KAYABA INDUSTRY CO., LTD. Patent applications |
Patent application number | Title | Published |
20160131217 | DAMPER - A damper that includes a piston reciprocally movable in a cylinder thereby dividing an interior of the cylinder into a first chamber located at an open end side and a second chamber located at a closed end side, a piston rod having a distal end to which the piston is connected and a rear end side protruding outward from the open end of the cylinder, a rod guide fixed to the open end of the cylinder and having a through hole through which the piston rod is reciprocally movable, and a seal which is provided in the rod guide so as to be located at a position spaced away from an outer end of a sliding surface of the through hole to the first chamber side by a distance longer than a maximum stroke width of the piston rod. | 05-12-2016 |
20160059663 | SHOCK ABSORBER - A shock absorber includes a suction passage allowing flow only from a reservoir towards a pressure side chamber, a rectifying passage allowing flow only from the pressure side chamber towards an expansion side chamber, and a damping force variable valve allowing flow only from the expansion side chamber towards the reservoir. Large, and small and outer peripheral chambers in a bottom housing sandwich a free piston. The small chamber communicates the outer peripheral chamber with the expansion side chamber. The large chamber communicates with the pressure side chamber through first and second valves. During a contraction in which a piston moves downward, even in a uniflow-type shock absorber in which pressure in the expansion side chamber and the pressure side chamber become equal, the free piston can move downward due to a difference in pressure-receiving areas. Even if a stretching speed reaches a high range, the first and second valves are opened, and damping force is reduced. | 03-03-2016 |
20160059298 | APPARATUS AND METHOD FOR MANUFACTURING A KNUCKLE BRACKET - A knuckle bracket includes a bracket main body that has an inner peripheral shape along a tube of a shock absorber and a pair of attachment parts that are formed to protrude parallel to each other. The apparatus for manufacturing the knuckle bracket includes a width molding machine that molds a width of the pair of attachment parts in a state where the workpiece is supported on a support shaft, and a hole punching machine that machines attachment holes into the pair of attachment parts in a state where the workpiece is supported on the support shaft. The workpiece is transported from the width molding machine to the hole punching machine by moving the workpiece along the support shaft until the workpiece is above the die after the support shaft is raised and then lowering the support shaft until the support shaft abuts a top surface of the die. | 03-03-2016 |
20160054742 | CONTROL VALVE - A control valve includes a poppet valve moving in an axial direction relative to a seat hole so as to change a flow-path cross-sectional area of the seat hole and a spring disc biasing the poppet valve in a valve opening direction against the return spring. The spring disc includes: a secondary-pressure receiving surface being a portion moving along with a movement of the poppet valve, the secondary-pressure receiving surface configured to receive secondary pressure introduced to the secondary port; and a pilot-pressure receiving surface configured to receive pilot pressure serving as a reference pressure. The spring disc deforms elastically in accordance with pressure difference between the secondary pressure and the pilot pressure to cause the poppet valve to move in the axial direction. | 02-25-2016 |
20160052589 | FRONT FORK - A front fork includes a pair of dampers standing on both sides of a wheel. One of the pair of dampers is a magnetic viscous fluid damper configured to use a magnetic viscous fluid whose viscosity is changed by an action of a magnetic field as a working fluid, while the other of the pair of dampers is a liquid-pressure damper configured to use a liquid such as oil, water, an aqueous solution and the like as the working fluid. | 02-25-2016 |
20160052360 | DAMPER CONTROL DEVICE - A damper control device includes a speed conversion unit configured to convert a damper speed to a control damper speed, and if the damper is accelerating, the damper speed is converted so that signs of the control damper speed and the damper speed accord with each other and an absolute value of the control damper speed becomes an absolute value of the damper speed or more, and if the damper is decelerating, the damper speed is converted so that the signs of the control damper speed and the damper speed accord with each other and the absolute value of the control damper speed becomes the absolute value of the damper speed or less, and a damping force of the damper is controlled by using the control damper speed. | 02-25-2016 |
20160046349 | HYDRAULIC SHOCK ABSORBER AND METHOD FOR INJECTING OPERATING LIQUID INTO HYDRAULIC SHOCK ABSORBER - A hydraulic shock absorber includes a cylinder connected to a wheel side, a liquid chamber formed in the cylinder and filled with an operating liquid, an annular rod guide fixed to the cylinder and closing a vehicle body side of the liquid chamber, a piston rod connected to the vehicle body side, penetrating a shaft core part of the rod guide, and going into/out of the cylinder, a piston held by the piston rod and dividing the liquid chamber into an extension-side chamber and a compression-side chamber, and an annular bush fitted in an inner periphery of the rod guide and pivotally supporting the piston rod, movably in an axial direction, in which the piston rod includes a columnar sliding shaft portion in sliding contact with the bush and a first injection portion for injecting the operating liquid provided on a side opposite to the piston of the sliding shaft portion and outside a range of a damper stroke. | 02-18-2016 |
20160046310 | DRIVING ASSIST UNIT OF TRUCK - A driving assist unit of a truck for assisting a driving force applied to the truck by a worker includes a unit body connected to the truck, the unit body being turnable with respect to the truck, an operation portion provided on the unit body, the operation portion being configured to input a driving force to the truck through the unit body by being pressed by the worker, a driving wheel provided on the unit body, the driving wheel being rotatable in a longitudinal direction of the unit body, an assist force according to the operation of the operation portion being applied to the driving wheel, a lower engagement mechanism configured to be engaged with a connecting rod, the connecting being provided protruding to an outside from the truck and perpendicularly with respect to a ground, the lower engagement mechanism being slidable in an axial direction with respect to the connecting rod, and an upper engagement mechanism provided above the lower engagement mechanism and configured to be engaged with the connecting rod, the upper engagement mechanism being slidable in the axial direction with respect to the connecting rod. | 02-18-2016 |
20160039446 | DRIVING ASSIST UNIT OF TRUCK - A driving assist unit of a truck for assisting a driving force applied to the truck by a worker includes a unit body connected to the truck, the unit body being turnable with respect to the truck, an operation portion provided on the unit body, the operation portion being configured to input a driving force to the truck through the unit body by being pressed by the worker, and a driving wheel provided on the unit body, the driving wheel being rotatable in a longitudinal direction of the unit body, an assist force according to the operation of the operation portion being applied to the driving wheel. | 02-11-2016 |
20160039444 | DRIVING ASSIST UNIT OF TRUCK - A driving assist unit of a truck for assisting a driving force applied to the truck by a worker includes a unit body connected to the truck, the unit body being turnable with respect to the truck, an operation portion provided on the unit body, the operation portion being configured to input a driving force to the truck through the unit body by being pressed by the worker, a driving wheel provided on the unit body, the driving wheel being rotatable in a longitudinal direction of the unit body, an assist force according to the operation of the operation portion being applied to the driving wheel, a lower engagement mechanism configured to be engaged with the truck by pressing the unit body onto the truck, and an upper engagement mechanism provided above the lower engagement mechanism and configured to be engaged with the truck by fitting of a locking member by the worker. | 02-11-2016 |
20160036187 | MANUFACTURING METHOD OF BUS BAR UNIT - A manufacturing method of a bus bar unit includes: a primary setting step of disposing a part of a plurality of bus bars into a first mold; a primary molding step of performing an insert molding by injecting the insulating resin material into the first mold, so as to form a primary molded member having a step part; a secondary setting step of disposing the primary molded member and a remaining bus bar of the plurality of bus bars into a second mold; and a secondary molding step of performing the insert molding by injecting the insulating resin material into the second mold, so as to form the bus bar unit. In the secondary setting step, the primary molded member and the remaining bus bar of the plurality of bus bars are arranged in the second mold in such a manner that at least one of an outer periphery and an inner periphery of the remaining bus bar abuts against the step part of the primary molded member. | 02-04-2016 |
20160032458 | SILVER-PLATED STRUCTURE - A silver-plated structure formed on a surface of a metallic base material includes: a pretreatment layer formed by washing the surface of the base material with a pretreatment agent; a resin paint film layer formed on a surface of the pretreatment layer; and a silver plating layer formed on a surface of the resin paint film layer. The silver plating layer includes: a silver film formed by a silver mirror reaction; an undercoat film that causes the silver film to adhere to the surface of the resin paint film layer; and a topcoat film that protects a surface of the silver film. | 02-04-2016 |
20160031286 | DAMPER CONTROL APPARATUS - A damper control apparatus damps vibration of an unsprung member by controlling a damping force of a damper in a vehicle, the damper being interposed between a sprung member and the unsprung member. The damper control apparatus includes a vibration level detecting unit that detects a vibration level serving as a magnitude of the vibration of the unsprung member, and a stroke speed detecting unit that detects a stroke speed of the damper. The damper control apparatus further includes a command value calculating unit that determines a control command value, the control command value is a command value for controlling the damping force of the damper on the basis of the vibration level of the unsprung member and the stroke speed of the damper. | 02-04-2016 |
20160031282 | SHOCK ABSORBER - A shock absorber mounted on a vehicle includes an inner portion that is made of a metal and has a first upper end and a first lower end, and an outer portion that is made of a composite material and is integrally formed with the inner portion. The outer portion has at least one of a second upper end on which the first upper end of the inner portion is folded and a second lower end on which the first lower end of the inner portion is folded, and a middle portion that has a seat for supporting a suspension spring. | 02-04-2016 |
20160031280 | SPRING RUBBER SEAT AND STRUT-TYPE SUSPENSION - A spring rubber seat provided between a spring formed by winding a wire rod to elastically support a chassis and a spring seat where the spring is placed. The spring rubber seat includes an arc seat portion having a seat surface where the spring is seated; and a link portion that links one circumferential end with the other circumferential end of the seat portion to make the spring rubber seat in an annular shape. | 02-04-2016 |
20160028286 | BUS BAR UNIT - At least one bus bar, out of a plurality of bus bars of a bus bar unit, includes: a bent main body part that bends and extends across a first stacked position and a second stacked position, the positions being separated in the axial direction of the stator; a first arc-shaped main body part that extends from one end of the bent main body part to be arranged next to another bus bar at the first stacked position along a circumferential direction of the stator; and a second arc-shaped main body part that extends from other end of the bent main body part to be arranged next to another bus bar at the second stacked position along the circumferential direction of the stator. | 01-28-2016 |
20160025237 | DAMPING VALVE - A damping valve includes a valve seat member, a valve body, a back-pressure chamber, a pilot passage, and a pilot valve, wherein the pilot valve has a pilot valve seat member and a pilot valve body, the pilot valve seat member having an cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port, and an annular pilot valve seat provided in an end of the valve container, and the pilot valve body having a large diameter portion, a small diameter portion slidably inserted into the valve container, and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole, and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage. | 01-28-2016 |
20160025180 | SHOCK ABSORBER - A shock absorber includes expanding-side and contracting-side chambers formed in a cylinder, a housing that forms a pressurizing chamber, a free piston that partitions the pressurizing chamber into an expansive pressurizing chamber communicating with the expanding-side chamber and a contractive pressurizing chamber communicating with the contracting-side chamber, and expanding-side and contracting-side springs that exert biasing forces for suppressing the free piston from being displaced from a neutral position. The contracting-side spring has a non-linear characteristic by which the spring constant increases as it is compressed. | 01-28-2016 |
20160025178 | DAMPING VALVE - A damping valve includes a valve seat member having a port and a first valve seat surrounding the port, a main valve body seated on or unseated from the first valve seat, the main valve body having a second valve seat oppositely to the valve seat member, a subsidiary valve body seated on or unseated from the second valve seat, a valve-body intermediate chamber provided between the main valve body and the subsidiary valve body in an inner circumferential side of the second valve seat, a restrictive passage that causes the port and the valve-body intermediate chamber to communicate with each other, the restrictive passage being configured to apply resistance to a flow of fluid passing therethrough, and a subsidiary valve body biasing means configured to bias the subsidiary valve body toward the main valve body. | 01-28-2016 |
20160025177 | DAMPING VALVE - A damping valve includes a valve seat member provided with a port, a valve body that opens or closes the port, a tubular spool that abuts on a side of the valve body opposite to the valve seat member, a spool holding member that has an outer circumference where the spool is mounted movably along an axial direction, a ring mounted to the outer circumference of the spool holding member, the ring contacting slidably with an inner circumference of the spool, and a back-pressure chamber partitioned by the spool and the spool holding member, the back-pressure chamber being configured to bias the spool such that the valve body is pressed toward the valve seat member using an internal pressure, wherein the internal pressure of the back-pressure chamber is applied to an inner circumferential side of the ring. | 01-28-2016 |
20160025176 | SOLENOID VALVE - A solenoid valve includes a valve seat provided in a main flow passage, a main valve body configured to open or close the main flow passage, a pilot passage that branches from the main flow passage, an orifice provided in the pilot passage, a back-pressure chamber connected to the pilot passage downstream from the orifice to bias the main valve body to a closing direction by virtue of an internal pressure, a pilot valve disposed in the pilot passage downstream from a connection point to the back-pressure chamber to control an internal pressure of the back-pressure chamber, a solenoid configured to control a valve opening pressure of the pilot valve, and a second orifice provided between the back-pressure chamber and the pilot valve. | 01-28-2016 |
20160023711 | VEHICLE HEIGHT ADJUSTMENT DEVICE - A vehicle height adjustment device includes a jack chamber for supporting a spring receiver supporting a suspension spring's one-side end portion and a fluid-pressure driving unit for supplying/discharging an operating fluid into/out of the jack chamber and elevating up/down the spring receiver. The fluid-pressure driving unit includes a pump for selectively supplying the operating fluid to a first or second channel and a tank connected to the first or second channel not receiving an operating fluid's supply from the pump. The vehicle height adjustment device further includes a jack channel allowing the first channel and the jack chamber to communicate with each other, a valve body closing the jack channel, capable of opening/closing, a spring for urging the valve body in a direction for shutting off the jack channel, and a pilot line for having a second channel's pressure act on the valve body so the jack channel is opened. | 01-28-2016 |
20160020660 | BUS BAR UNIT AND MANUFACTURING METHOD OF BUS BAR UNIT - A bus bar of a bus bar unit includes a main body part extended along a circumferential direction of the stator such that a plate thickness direction of the bus bar agrees with an axial direction of the stator; an extension part extended from the main body part in a radial direction of the stator; and a coil connection part provided at a tip of the extension part, the coil connection part being connectable to a winding terminal of the coil. The extension part includes a retained part having surfaces perpendicular to the axial direction of the stator on both sides of the plate thickness direction. The retained part are held by molds for the insert molding of the bus bar when the insulating resin is formed by the insert molding of the bus bar. | 01-21-2016 |
20160017884 | VARIABLE DISPLACEMENT VANE PUMP - A variable displacement vane pump includes a rotor, vanes, a cam ring, pump chambers, a suction port, a discharge port, back pressure chambers, a plate that has a sliding contact surface and a penetrating hole, a suction-side back pressure port being configured to guide the working fluid in the suction port to the back pressure chambers in a suction section, a discharge-side back pressure port being configured to guide the working fluid that is discharged from the discharge port to the back pressure chambers in a discharge section, an additional groove provided on the sliding contact surface so as to extend from between the discharge-side back pressure port and the penetrating hole to between the suction-side back pressure port and the penetrating hole, and a connection groove that communicates the additional groove with the suction-side back pressure port. | 01-21-2016 |
20160016605 | ELECTRIC POWER STEERING DEVICE AND ADJUSTING DEVICE AND ADJUSTING METHOD OF ELECTRIC POWER STEERING DEVICE - Output signals of a torque sensor include a first output signal used in an assist control and a second output signal used in controls other than the assist control. An adjusting device of an electric power steering device includes an input torque meter for measuring an input torque applied to the input shaft, an output torque meter for measuring an output torque output by the steering mechanism, and a sensor output corrector for correcting an output signal of the torque sensor. The sensor output corrector corrects the first output signal so that a relationship between the input torque measured by the input torque meter and the output torque measured by the output torque meter becomes an ideal characteristic set in advance, and corrects the second output signal so that an input torque detected by the torque sensor coincides with the input torque measured by the input torque meter. | 01-21-2016 |
20160003320 | SOLENOID VALVE - A solenoid valve includes a main valve having a valve seat and a main valve body configured to open or close a main flow passage, a pilot passage that branches from the main flow passage, an orifice provided in the pilot passage, a back-pressure chamber configured to bias the main valve body to a closing direction by virtue of an internal pressure, a pilot valve configured to control an internal pressure of the back-pressure chamber, and a solenoid configured to control a valve opening pressure of the pilot valve. There is a time difference between a valve opening timing of the main valve and a valve opening timing of the pilot valve such that the valve opening timing of the main valve is delayed from the valve opening timing of the pilot valve. | 01-07-2016 |
20160003241 | VANE PUMP - A vane pump includes: a rotor; vanes; a cam ring; pump chambers; a suction port; a discharge port; back-pressure chambers; a discharge-side back pressure port configured to guide working fluid that is discharged from the discharge port to the back-pressure chambers; and suction-side back pressure ports configured to guide the working fluid to the back-pressure chambers. The suction-side back pressure ports are formed to be divided into a low-pressure port and a high-pressure port, the low-pressure port being configured to guide the working fluid in the suction port to the back-pressure chambers, and the high-pressure port being configured to guide the working fluid that is discharged from the discharge port to the back-pressure chambers. The high-pressure port is arranged at the forward-side of the low-pressure port in rotating direction of the rotor. | 01-07-2016 |
20160003237 | PUMP DISCHARGE FLOW-RATE CONTROL DEVICE - A pump discharge flow-rate control device includes a constant capacity pump driven by a common driving source with a variable capacity pump, a resistor interposed in a signal pressure passage through which a working fluid discharged from the constant capacity pump flows, and a control pressure actuator configured to lower the control pressure by driving the regulator in accordance with a rise in a differential pressure before and after the resistor. The resistor includes a fixed throttle and a check valve interposed in the signal pressure passage in parallel with each other. The check valve includes a seat interposed in the signal pressure passage, a poppet arranged on a downstream side of the seat, and a spring configured to press the poppet to the seat. | 01-07-2016 |
20160001812 | LOAD CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND METHOD FOR CONTROLLING LOAD CONTROL DEVICE - A load control device includes a load control means that drives a load, a current detection resistor, a differential amplifier and a current calculation means. The load control means can switch between a standby state a drive state, a state in which a first of the switching elements is turned ON and a second of the switching elements is turned OFF and a state in which the first of the switching elements is turned OFF and the second of the switching elements is turned ON being alternately repeated in the standby state, in which both of the switching elements are turned ON in the drive state. The current calculation means calculates a current that flows to the current detection resistor on the basis of a value output from the differential amplifier in the drive state and an offset value output from the differential amplifier in the standby state. | 01-07-2016 |
20160001795 | ACTUATOR UNIT - An actuator unit includes a rod side chamber and a piston side chamber defined by a piston; a tank; a first opening/closing valve communicating the rod side chamber with the piston side chamber; a second opening/closing valve communicating the piston side chamber with the tank; an suction passage allowing a working fluid to flow from the tank toward the piston side chamber; a rectifying passage allowing the working fluid to flow from the piston side chamber toward the rod side chamber; a pump suppling the working fluid to the rod side chamber; a first discharge passage and a second discharge passage respectively communicating the rod side chamber to the tank; a first passive valve provided on the first discharge passage; a second passive valve provided on the second discharge passage; and a third passive valve configured to communicate and block the first discharge passage. | 01-07-2016 |
20150377236 | VANE PUMP - The vane pump includes a rotor, a plurality of slits, vanes that are respectively received in the slits, a cam ring that has an inner circumferential cam face with which tip portions of the vanes are brought into sliding contact, pump chambers that are defined by the rotor, the cam ring, and the adjacent vanes, a side member that has a sliding contact surface with which the side surface of the rotor is brought into sliding contact, a discharge port that is formed so as to open to the side member, the discharge port being configured to guide working fluid discharged from the pump chamber, and a notch that are provided on the side member so as to extend from the opening of the discharge port in direction opposite to rotating direction of the rotor. The notch is formed radially outside of the protruded portion of the rotor. | 12-31-2015 |
20150375587 | KNUCKLE BRACKET AND PAIR OF KNUCKLE BRACKETS - A knuckle bracket includes a cylindrical bracket main body that is fixed by welding to an outer periphery of an outer tube of a shock absorber and a pair of gripping pieces that extend along an axial direction of the bracket main body and stand up toward the outside from the bracket main body opposing each other. The bracket main body has a cut-away part formed on one side end and a compression part, the compression part being configured to abut a misassembly detection pin of a misassembly prevention device, the misassembly prevention device being configured to identify a type of the knuckle bracket. | 12-31-2015 |
20150369263 | ACTUATOR UNIT - An actuator unit includes two chambers defined in the cylinder; a supply passage allowing a working fluid discharged from the pump to be supplied to the two chambers; a discharge passage allowing the two chambers to communicate with the tank; a direction control valve configured to selectively communicate each of the two chambers with one of the pump and the tank; a control passage that branches from the supply passage on a side of the pump rather than the direction control valve so as to communicate the pump with the tank; a variable relief valve provided on the control passage, the variable relief valve opening so as to allow the working fluid to flow from the supply passage toward the tank when a pressure in the supply passage reaches the valve opening pressure; and a center passage that communicates the tank with an interior of the cylinder. | 12-24-2015 |
20150369262 | FLUID PRESSURE CONTROL DEVICE - A fluid pressure control device includes a switching valve configured to operate in conjunction with the control valve by the pilot pressure led through the pilot valve to switch work of the operation check valve. The switching valve includes a pilot chamber to which the pilot pressure is led, a spool that moves in accordance with the pilot pressure of the pilot chamber, a bias member that biases the spool in the valve closing direction, a collar detachably installed in the pilot chamber, and a piston slidably inserted into the collar, the piston being configured to receive the pilot pressure on a back surface thereof and give thrust force to the spool against bias force of the bias member. | 12-24-2015 |
20150367703 | DAMPER CONTROL DEVICE - A damper control device controls vibration of an unsprung member by controlling a damping force of a damper interposed between a sprung member and the unsprung member of a vehicle on the basis of a damping property prepared in advance. The damper control device includes a correction unit that extracts a sprung resonant frequency component of a stroke velocity of the damper, and corrects a damping force target value of the damper on the basis of the extracted above-spring resonant frequency component. | 12-24-2015 |
20150367702 | DAMPER CONTROL DEVICE - A damper control device controls a damping force of each damper interposed between a vehicle body and a corresponding one of a plurality of vehicle wheels of a vehicle. The damper control device includes: a good wavy road control calculation unit that obtains, for each damper, a good wavy road control instruction suitable for a good wavy road representing a wavy road surface; a bad wavy road control calculation unit that obtains, for each damper, a bad wavy road control instruction suitable for a bad wavy road that has more concavities and convexities than the good wavy road; and a final instruction calculation unit that obtains a final control instruction for each damper based on the good wavy road control instruction and on the bad wavy road control instruction. | 12-24-2015 |
20150362075 | SEAL MEMBER AND FRONT FORK PROVIDED WITH SEAL MEMBER - A seal member includes an annular fitting part and an annular dust lip. The fitting part fits on an inner circumference of a tubular member. The dust lip extends from the fitting part toward a side opposite from the tubular member such that a diameter of an inner circumference of the dust lip gradually decreases, and a distal end portion of the dust lip slides on an outer circumferential surface of a shaft member. A metal insert includes a reinforcing ring and a reinforcing extension piece. The reinforcing ring stands along the inner circumference of the tubular member. The reinforcing extension piece extends from the reinforcing ring toward a side opposite from the tubular member, and inclines such that a distal end of the reinforcing extension piece approaches the shaft member. The reinforcing ring is arranged in the fitting part, whereas the reinforcing extension piece is arranged in the dust lip. | 12-17-2015 |
20150357888 | BUS BAR UNIT MANUFACTURING METHOD AND BUS BAR UNIT - A bus bar unit manufacturing method by insert-molding a plurality of bus bars using insulating resin includes a primary setting step of disposing the plurality of bus bars on a support portion provided in a first die such that the plurality of bus bars are separated from each other in a bus bar axial direction, an insertion step of inserting a gap maintaining member between the bus bars, the gap maintaining member being a member that maintains gaps between the adjacent bus bars disposed on the support portion and is provided to be capable of moving relative to the support portion, and a primary molding step of executing insert molding by injecting the insulating resin into the first die in a condition where the gap maintaining member is inserted between the bus bars. | 12-10-2015 |
20150354657 | SHOCK ABSORBER - A shock absorber includes a shock absorber body having an outer shell and a piston rod, the shock absorber body being configured to generate a damping force for suppressing relative movement in an axial direction of the piston rod with respect to the outer shell; a dust cover connected to the piston rod, the dust cover allowing the outer shell to enter an inner part; an extension cover formed in a belt-like shape to be wound around an outer circumference of the dust cover, the extension cover extending from the dust cover to an outer shell side, the outer shell being inserted into an inner side of the extension cover; and a fixing member configured to fix the extension cover in a state that the extension cover is wound around the outer circumference of the dust cover. | 12-10-2015 |
20150354656 | SHOCK ABSORBER - A shock absorber includes a valve disc defining two chambers, a flow passage formed in the valve disc, the flow passage allowing communication between the two chambers, a window formed in the valve disc, the window being connected to the flow passage, a valve seat formed on the valve disc, the valve seat surrounding the outer periphery of the window; and a plurality of leaf valves formed in the shape of annular plates, the plurality of leaf valves being stacked on the valve disc. The first leaf valve stacked on the valve disc is provided such that an outer peripheral part is seatable on and separable from the valve seat, and includes a rib recessed on a valve disc side and projecting on an opposite valve disc side at a position facing the valve seat. | 12-10-2015 |
20150354655 | SHOCK ABSORBER - A shock absorber includes a valve disc defining two chambers, a flow passage formed in the valve disc, the flow passage allowing communication between the two chambers, and a plurality of leaf valves formed in the shape of annular plates, the plurality of leaf valves being stacked on the valve disc to openably close an outlet of the flow passage. The leaf valve disposed on the tail end of the plurality of leaf valves stacked on the valve disc includes a rib projecting in an axial direction from one flat surface and recessed on an opposite side. | 12-10-2015 |
20150354606 | ACTUATOR UNIT - An actuator unit includes a rod side chamber and a piston side chamber defined in the cylinder by a piston; a tank; a direction control valve configured to allow a working fluid discharged from the pump to be supplied selectively to the rod side chamber and the piston side chamber; a first control passage the rod side chamber with the tank; a second control passage the piston side chamber with the tank; a first variable relief valve provided on the first control passage, the first variable relief valve being configured to be varied a valve opening pressure; a second variable relief valve provided on the second control passage, the second variable relief valve configured to be varied a valve opening pressure; and a center passage the tank with a interior of the cylinder. | 12-10-2015 |
20150345584 | PISTON AND SHOCK ABSORBER INCLUDING PISTON - Provided on one plane of an annular piston are a sheet surface on which a leaf valve is seated and a supporting part constructed of a slope part and a flange part, and provided on the other plane is a leg part having a depression on an edge part. When two pistons are axially stacked, the sheet surface of one of the pistons is contained inside the depression of the other piston, and the sheet surface of the one piston is protected. | 12-03-2015 |
20150337813 | PUMP VOLUME CONTROL APPARATUS - A pump volume control apparatus includes: a tilting piston; a pump volume switching valve configured to adjust a tilt driving pressure by a movement of a spool; a flow rate control spring configured to bias the spool in accordance with a tilt angle; a horsepower control piston configured to move in accordance with a pump discharge pressure; and a horsepower control spring configured to bias the horsepower control piston in accordance with the tilt angle. The tilt driving pressure is adjusted by means of the movement of the spool in accordance with a force acting on the spool in response to a flow rate controlling signal pressure in a flow rate controlled state, and is adjusted by means of the movement of the spool in accordance with a force acting on the horsepower control piston in response to the pump discharge pressure in a horsepower controlled state. | 11-26-2015 |
20150330416 | FLUID PRESSURE CONTROL DEVICE FOR POWER SHOVEL - A fluid pressure control device for a power shovel includes: a first switching valve configured to permit or prohibit communication between a first pump and a first cylinder; a second switching valve configured to permit or prohibit communication between a second pump and a second cylinder; a third pump configured to allow to supply working fluid to the first cylinder and the second cylinder; a first junction control valve configured to permit or prohibit communication between the third pump and the first cylinder or the second cylinder; and a communication control valve configured to prohibit communication between the third pump and the first cylinder to guide the working fluid discharged by the third pump to the second cylinder by controlling the first junction control valve in a case where the second pump is communicated with the second cylinder by the second switching valve regardless of whether or not the first pump is communicated with the first cylinder by the first switching valve. | 11-19-2015 |
20150323036 | SHOCK ABSORBER - A shock absorber includes: a communication passage configured to cause a working fluid chamber formed in a cylinder to communicate with a reservoir for reserving a working fluid therein; a damping force generating mechanism configured to apply resistance to the working fluid passing through the communication passage; a low-speed compression-side damping adjuster configured to change a damping force when a stroke speed is in a low-speed range during compression; a high-speed compression-side damping adjuster configured to change the damping force when the stroke speed is in a high-speed range, the high-speed range representing higher speed than the low-speed range during compression; and an extension-side damping adjuster configured to change the damping force during extension. The low-speed compression-side damping adjuster, the high-speed compression-side damping adjuster, and the extension-side damping adjuster are attached to a tank side of the cylinder. | 11-12-2015 |
20150314664 | VEHICLE HEIGHT ADJUSTING APPARATUS - A vehicle height adjusting apparatus includes: an annular movable spring receiver in sliding contact with a guide surface formed on an outer periphery of an outer tube of a damper, the movable spring receiver being configured to support one side end of a suspension spring, the suspension spring biasing the damper in an expansion direction; a driving mechanism configured to drive the movable spring receiver in an axial direction of the damper; an auxiliary spring configured to bias the movable spring receiver to the suspension spring side; and a dust cover configured to cover a portion on the guide surface, the movable spring receiver being in sliding contact with the guide surface in the portion. The dust cover is held on the outer tube by means of a spring force of the auxiliary spring. | 11-05-2015 |
20150300443 | MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER - The entire length of a piston ( | 10-22-2015 |
20150300379 | CYLINDER CONTROL DEVICE - In a cylinder control device comprising a control valve that controls a flow of working fluid flowing between a cylinder and a pump, the control valve includes a spool provided in a main body portion, a sleeve that is provided in the main body portion opposite each of two end portions of the spool, and includes a communicating port that communicates with a valve chamber, a communicating passage that communicates with a cylinder chamber, and a throttle passage that communicates with the cylinder chamber, a valve body provided in the sleeve to control a communication state between the communicating port and the communicating passage and throttle passage in accordance with a sliding position thereof, and a biasing member that biases the valve body in a valve closing direction. | 10-22-2015 |
20150290992 | VEHICLE HEIGHT ADJUSTING DEVICE AND ASSEMBLING METHOD FOR VEHICLE HEIGHT ADJUSTING DEVICE - A vehicle height adjusting device includes an annular movable spring bearing mounted on the outer periphery of an outer tube of a shock absorber, the movable spring bearing being configured to support one side end of a suspension spring for biasing the shock absorber in an extending direction, a driving mechanism configured to drive the movable spring bearing in an axial direction of the shock absorber, an auxiliary spring configured to bias the movable spring bearing toward the suspension spring, and a stopper member mounted on the outer periphery of the outer tube of the shock absorber, the stopper member being configured to restrict a movement of the movable spring bearing toward the suspension spring. | 10-15-2015 |
20150285388 | LEVELING VALVE - A leveling valve includes: a seat portion configured to define a flow passage, the flow passage communicating with the air cushion and a compressed air source or communicating with the air cushion and a drain; a valve configured to move in an axial direction in accordance with a relative displacement of the vehicle body with respect to the truck; a spring configured to bias the valve toward a closing side, the valve being in contact with the seat portion in the closing side; a valve guide configured to support one end of the spring, the valve guide being slidably inserted with respect to a housing inner wall surface; and a communication port opened to the housing inner wall surface. A moving region in which the valve guide moves is set to a position offset from the communication port in the axial direction. | 10-08-2015 |
20150285274 | FLUID PRESSURE CONTROL DEVICE FOR POWER SHOVEL - A fluid pressure control device for a power shovel including first, second, and third pumps, a first switching valve connected to the first pump, a second switching valve connected to the second pump, a first merge control valve connected to the third pump, and a second merge control valve provided downstream of the first merge control valve, in which the first merge control valve is switched by a pilot pressure of the first switching valve or the second switching valve to enable communication between the third pump and a downstream side, and the second merge control valve is switched by a pilot pressure of the second switching valve to block communication between the third pump and the first switching valve. | 10-08-2015 |
20150275989 | CALIPER BRAKE APPARATUS - A caliper brake apparatus includes a piston configured to advance and retreat in accordance with a pressure in a pressure chamber of a caliper main body, a guide plate attached to the piston so as to support a brake shoe, and a fastening member configured to fasten the piston to the guide plate. The fastening member includes a tapered seating surface, and at least one of the piston and the guide plate includes a tapered contact portion on which the seating surface of the fastening member is seated. | 10-01-2015 |
20150275938 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A control system for a hybrid construction machine includes a turning-regeneration-use switching valve that opens when a pressure detected by a pressure detector reaches a turning-regeneration starting pressure, so as to introduce the working fluid from a turning circuit to a regenerative motor, an operating-state detector that detects an operating state of a fluid pressure cylinder; and a cylinder-regeneration-use switching valve that opens based on a detection result of the operating-state detector, so as to introduce the working fluid from the fluid pressure cylinder to the regenerative motor. When the turning regeneration is performed alone, the working fluid from the turning circuit is introduced into the regenerative motor without pressure reduction, When the turning regeneration and the cylinder regeneration are simultaneously performed, the working fluid from the turning circuit is reduced in pressure, joins the working fluid from the fluid pressure cylinder, and is introduced into the regenerative motor. | 10-01-2015 |
20150267700 | VARIABLE DISPLACEMENT VANE PUMP - A variable displacement vane pump includes: a rotor to be rotatively driven; a plurality of vanes slidably housed in the rotor; a cam ring allowed of eccentric with respect to a center of the rotor, the cam ring having an inner circumferential cam surface in sliding contact with a distal end portion of the vane; a pump chamber defined by the adjacent vanes, the rotor, and the cam ring; a suction port to guide hydraulic fluid to be suctioned to the pump chamber; and a discharge port to guide hydraulic fluid to be discharged from the pump chamber. An outer circumference of an opening portion of the suction port is formed so as to be positioned along the inner circumferential cam surface of the cam ring or at an outside of the inner circumferential cam surface regardless of eccentricity of the cam ring with respect to the rotor. | 09-24-2015 |
20150260204 | CYLINDER DRIVING APPARATUS - A cylinder driving apparatus includes a first passage connecting a first chamber of a cylinder to a first port of a pump; a second passage connecting a second chamber of the cylinder to a tank; a third passage connecting a second port of the pump to the tank; a throttle configured to apply resistance to a working fluid flowing through the third passage; and an operated check valve provided in the first passage to allow the working fluid to flow from the pump into the first chamber. The operated check valve is configured to allow the working fluid to flow from the first chamber into the pump in accordance with a fluid pressure of the working fluid in the third passage between the pump and the throttle. | 09-17-2015 |
20150260153 | OPPOSED SWASH PLATE TYPE FLUID PRESSURE ROTATING MACHINE - An opposed swash plate type fluid pressure rotating machine in which a first piston and a second piston projecting from opposite ends of a cylinder block reciprocate in a cylinder, respectively following a first swash plate and a second swash plate includes a center spring for biasing the cylinder block toward the second swash plate. A housing hole (biasing force receiving part) for receiving a biasing force of the center spring is formed on one end part of the cylinder block. The tip of a second neck (reaction force receiving part) for receiving a reaction force from the second swash plate is formed on the other end part of the cylinder block. The cylinder block is biased only toward the second swash plate by the center spring. | 09-17-2015 |
20150240637 | FLUID PRESSURE ROTATING MACHINE - A piston motor includes a bush in the form of a curved plate held in sliding contact with a back surface of a tiltable swash plate, a supply/discharge passage formed on the casing including a swash plate port formed on the swash plate and open on the back surface of the swash plate and a bush port penetrating through the bush and provided from a piston to the swash plate, and an elastic ring interposed between the casing and the bush and surrounding an opening end of the bush port. | 08-27-2015 |
20150240636 | OPPOSED SWASH PLATE TYPE FLUID PRESSURE ROTATING MACHINE - An opposed swash plate type fluid pressure rotating machine in which a first piston and a second piston projecting from opposite ends of a rotary cylinder block reciprocate in a cylinder, respectively following a first swash plate and a second swash plate includes a first tilt bearing for tiltably supporting the first swash plate, a first tilt driving piston for tilting the first swash plate in a direction intersecting with an axis of rotation of the cylinder block, a second tilt bearing for tiltably supporting the second swash plate, and a second tilt driving piston for tilting the second swash plate in a direction intersecting with the axis of rotation of the cylinder block. | 08-27-2015 |
20150239317 | DAMPER CONTROL DEVICE - A damper control device includes a pitching angular velocity detection unit that detects a pitching angular velocity of a vehicle body, a front wheel side pressure detection unit that detects a pressure of a compression side chamber in a front wheel side damper, and a rear wheel side pressure detection unit that detects a pressure of a compression side chamber in a rear wheel side damper. The damper control device controls the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper based on the pitching angular velocity, the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper. | 08-27-2015 |
20150233442 | SUSPENSION DEVICE - A suspension device includes a shock absorber, an air spring that consists of a compressed gas that is sealed within an air chamber that expands/contracts in volume as the shock absorber extends/compresses so as to constantly bias the shock absorber in an extension direction, and a volume expanding mechanism that expands a volume of the air chamber according to an increase in a compression amount of the shock absorber when the compression amount of the shock absorber has reached or exceeded a predetermined amount. | 08-20-2015 |
20150226236 | HYDRAULIC CONTROL APPARATUS - A hydraulic control apparatus includes: a plurality of spools incorporated into a valve main body; a cap provided on the valve main body; pilot chambers provided in the cap to correspond to the respective spools; a maximum pressure introduction passage to which a maximum pressure of the pilot chambers is led; connecting passages connecting the maximum pressure introduction passage to the respective pilot chambers; and selection valves provided in the connecting passages. The maximum pressure of the respective pilot chambers is selected by the selection valve and led to the maximum pressure introduction passage. The maximum pressure introduction passage is provided in the cap on an opposite side of the pilot chambers to a side on which the valve main body is provided. | 08-13-2015 |
20150219108 | CONTROL DEVICE FOR WORKING MACHINE - A control device for a working machine includes a storage unit in which a constant used in a program for operating the working machine is stored, a control unit which is configured to control the operation of the working machine by executing the program using the constant stored in the storage unit, and a connector unit to which an external apparatus capable of inputting an update value for overwriting the constant stored in the storage unit is connected. | 08-06-2015 |
20150217344 | DRUM WASHING APPARATUS - A drum washing apparatus for washing an interior of a mixer drum carried on a mixer truck includes a washing liquid supply hose for supplying a washing liquid; a washing pipe connected to the washing liquid supply hose, a tip end portion of which is inserted into the interior of the mixer drum through an open end of the mixer drum; and an ejection portion provided in the washing pipe to eject the washing liquid into the mixer drum. The washing pipe is adapted to be capable of moving in response to an externally applied external force. | 08-06-2015 |
20150211634 | SHOCK ABSORBER AND PISTON - A piston includes a disc formed to have an annular shape, a cylindrical skirt portion that projects from an outer peripheral portion of the disc on one end side in an axial direction of the disc, and a passage that is formed in the disc and that is opened on an inner side of the skirt portion. An inner peripheral surface of the skirt portion is a slope that increases its diameter toward a side opposite to the disc. | 07-30-2015 |
20150210136 | SHOCK ABSORBER - A shock absorber includes a cylinder, a piston, a piston rod, an expansion-side passage that allows a fluid to flow only from an expansion-side chamber toward a contraction-side chamber, a contraction-side passage that allows the fluid to flow only from the contraction-side chamber toward the expansion-side chamber, an expansion-side damping valve that applies resistance to a flow of fluid passing through the expansion-side passage, a contraction-side damping valve that applies resistance to a flow of fluid passing through the contraction-side passage, an expansion-side bypass passage that connects the expansion-side chamber to the contraction-side chamber, an expansion-side relief valve that is opened by pressure in the expansion-side chamber so as to open the expansion-side bypass passage, a contraction-side bypass passage that connects the expansion-side chamber to the contraction-side chamber, and a contraction-side relief valve that is opened by pressure in the contraction-side chamber so as to open the contraction-side bypass passage. | 07-30-2015 |
20150204409 | SHOCK ABSORBER - A shock absorber including a cylindrical outer shell and a piston rod slidably inserted into the outer shell, the shock absorber includes a cylindrical dust cover coupled to the piston rod and permitting an entry of the outer shell to inside thereof; and an annular dust filter whose inner peripheral side is attached to the outer shell and whose outer periphery is brought into slidable contact with an inner periphery of the dust cover at all times. | 07-23-2015 |
20150204408 | VALVE AND SHOCK ABSORBER - A valve includes an annular disc having an opening window and a passage that extends from an inner periphery or an outer periphery of the disc to the opening window, and an annular leaf valve that is laminated onto the disc in order to open and close the opening window. The passage is covered by the leaf valve so as to function as an orifice. | 07-23-2015 |
20150197307 | SUSPENSION DEVICE - A suspension device interposed between a vehicle body and a wheel includes a shock absorber, a suspension spring, a tube member accommodating the shock absorber and the suspension spring, a sealing member closing a one-side opening of the tube member and holding a piston rod of the shock absorber, a damping force adjustment portion, which includes a coil generating a magnetic field in a passage and a wiring penetrating the piston rod and the sealing member and conducting the coil, electrically adjusting resistance caused when an operating fluid, which is a magnetic viscous fluid whose viscosity changes by a magnetic field's action, passes through the passage allowing two chambers defined and formed by a piston in a cylinder to communicate with each other in the shock absorber, and a reaction force adjustment portion, which is mounted on the sealing member, for adjusting a reaction force of the suspension spring. | 07-16-2015 |
20150197132 | SHOCK ABSORBER - A shock absorber provided with a suspension spring, the shock absorber includes a tube whose lower end portion is joined to a vehicle axle side portion provided with a tire, and a lower spring bearing that is provided on an outer circumference of the tube and supports a lower end of the suspension spring. The lower spring bearing includes a bearing part on which the lower end of the suspension spring is seated, and a contact part that is continuous with the bearing part. An outer diameter of the contact part is larger than an outer diameter of the tube. | 07-16-2015 |
20150192184 | DAMPING VALVE FOR SHOCK ABSORBER - This invention obtains damping force in choke characteristics when piston speed is in low-speed region, and reduces damping force when piston speed is in medium-high-speed region. A damping valve for a shock absorber includes a piston partitioning an extension-side chamber from a pressure-side chamber, a returner laminated to pressure-side chamber side of piston, a flow passage penetrating from piston to returner and having entrance constantly communicating with expansion-side chamber, a leaf valve laminated to retainer and operably closing an exit of expansion-side flow passage, a first outer peripheral groove formed on outer periphery of piston rod. A passage T functioning as a choke is formed between first outer peripheral groove and retainer. One side of passage communicates with flow passage and other side thereof communicates with compression-side chamber. | 07-09-2015 |
20150184716 | SHOCK ABSORBER - A shock absorber including a cylinder, a piston, a piston rod, and a damping passage communicating an expansion-side chamber with a compression-side chamber, includes a pressure chamber formed by a cylindrical housing provided on the expansion-side chamber side of the piston rod from the piston and a piston holder to which the piston is mounted and which closes the opening of the housing, a free piston slidably inserted inside the housing and which divides the pressure chamber into an expansion-side pressure chamber communicating with the expansion-side chamber via an expansion-side channel and a compression-side pressure chamber communicating with the compression-side chamber via a compression-side channel, and a spring element that generates energizing force for restraining displacement of the free piston with respect to the pressure chamber. | 07-02-2015 |
20150184715 | SHOCK ABSORBER - A shock absorber includes a shock absorber body interposed between a vehicle body and a wheel, a cylinder connected to a wheel side and standing in a shaft center portion of the shock absorber body, a liquid chamber formed in the cylinder and filled with an operating liquid, an annular rod guide fixed to the cylinder and closing a liquid chamber's vehicle body side, a piston rod connected to a vehicle body side, penetrating a shaft center portion of the rod guide, and going into and out of the cylinder, an annular seal member held on a rod guide's inner periphery and in sliding contact with a piston rod's outer peripheral surface, and a relief portion formed on a piston rod's outer periphery and forming a gap between the piston rod and the seal member when the piston rod retreats from the cylinder by a predetermined amount. | 07-02-2015 |
20150184681 | ACTUATOR - An actuator includes a cylinder, a piston, a rod, a rod-side chamber and a piston-side chamber, a tank, a first pump capable of supplying liquid to the rod-side chamber, a second pump capable of supplying the liquid to the piston-side chamber, a first control passage allowing communication between the rod-side chamber and the tank, a second control passage allowing communication between the piston-side chamber and the tank, a first variable relief valve capable of changing a valve opening pressure for permitting a flow of the liquid by being opened when a pressure in the rod-side chamber reaches the valve opening pressure, a second variable relief valve capable of changing a valve opening pressure for permitting a flow of the liquid by being opened when a pressure in the piston-side chamber reaches the valve opening pressure, and a center passage allowing communication between the tank and the interior of the cylinder. | 07-02-2015 |
20150184364 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A control system for a hybrid construction machine includes: a turning motor provided in a turning circuit; a pressure detector for detecting a turning pressure of the turning motor; a variable displacement type of fluid pressure motor for regeneration which is rotated by means of pressurized fluid guided from the turning motor; a motor generator adapted to be rotated integrally with the fluid pressure motor; and a controller adapted to predict a turning regeneration flow from the turning motor on the basis of the turning pressure detected by pressure detector to control a tilt angle of the fluid pressure motor on the basis of the predicted turning regeneration flow. | 07-02-2015 |
20150159724 | DAMPING VALVE - A damping valve includes: a valve disc having a port; a shaft member provided in an axial central portion of the valve disc; an annular leaf valve that is attached to an outer periphery of the shaft member so as to be adjacent to the valve disc, and that is adapted to open and close the port; an annular main valve provided on the outer periphery of the shaft member to be free to move, and disposed adjacent to the leaf valve on an opposite side to the valve disc; and one or more annular plate springs provided on the outer periphery of the shaft member. The plate spring includes a conical plate spring main body having a hole and a flange that projects toward a radial direction outer side from an outer periphery of the plate spring main body. | 06-11-2015 |
20150152939 | SUSPENSION DEVICE - A suspension device interposed between a vehicle body and a wheel, including a magnetic viscous fluid shock absorber in which a magnetic viscous fluid is sealed, a tube member composed of an outer tube connected to the vehicle body side and an inner tube connected to the wheel side and going into/out of the outer tube and accommodating the magnetic viscous fluid shock absorber, a lubricant liquid stored in the tube member, and a seal member closing a space between the inner tube and the magnetic viscous fluid shock absorber and preventing intrusion of the lubricant liquid to the wheel side. | 06-04-2015 |
20150152935 | DAMPER - A damper includes a cylinder, a piston that is inserted into the cylinder, a rod that is connected to the piston, a rod-side chamber and a piston-side chamber that are divided within the cylinder, a tank, an extension-side passage that allows communication between the rod-side chamber and the tank, a compression-side passage that allows communication between the piston-side chamber and the tank, an extension-side damping valve that is provided in the extension-side passage, a first check valve that is provided in the extension-side passage in parallel with the extension-side damping valve, a compression-side damping valve that is provided in the compression-side passage, a second check valve that is provided in the compression-side passage in parallel with the compression-side damping valve, and a center passage that allows communication between the tank and the inside of the cylinder. | 06-04-2015 |
20150152900 | CONTROL SYSTEM FOR CONSTRUCTION MACHINE - A control system for a construction machine includes: a boom cylinder; a boom switching valve; a fluid pressure motor adapted to drive a motor generator by being rotated by means of a return fluid guided from a piston side chamber; a regeneration control valve adapted to adjust a first supply amount serving as a supply amount of a working fluid supplied from the piston side chamber to the boom switching valve, and a second supply amount serving as a supply amount of the working fluid supplied from the piston side chamber to the fluid pressure motor; and a controller adapted to control the regeneration control valve so that the second supply amount becomes smaller than the first supply amount in a case where a stroke amount of a spool becomes an upper limit value or more. | 06-04-2015 |
20150152890 | CONSTRUCTION MACHINE AND CONTROLLER - A construction machine having an actuator that is driven by a working fluid includes a state value detection unit that detects a state value indicating an operating condition of the actuator, a mode determination unit that determines an operating mode by comparing the state value with a determination condition value, and a condition value setting unit that modifies the determination condition value on the basis of a comparison result of the mode determination unit. The condition value setting unit sets the determination condition value such that the determination condition value is increased when the state value falls below the determination condition value and decreased when the state value rises above the determination condition value. | 06-04-2015 |
20150139824 | PUMP CONTROL APPARATUS - A pump control apparatus includes an actuator that varies a discharge capacity of a pump, and a regulator that regulates a control pressure led to the actuator. The regulator includes: a driving pressure port to which an average discharge pressure is led; a source pressure port to which a high pressure side discharge pressure is led; a signal pressure port to which a signal pressure is led; and a spool that regulates the control pressure using the high pressure side discharge pressure as a source pressure by moving upon reception of the average discharge pressure and the signal pressure. A driving pressure receiving surface that receives the average discharge pressure is formed inside the spool, and a signal pressure receiving surface that receives the signal pressure is formed in an outer peripheral step portion of the spool. | 05-21-2015 |
20150134196 | HYBRID CONSTRUCTION MACHINE, CONTROLLER, AND WRITE PROCESSING METHOD FOR NONVOLATILE MEMORY - A hybrid construction machine includes a hydraulic apparatus having a pump; a regeneration apparatus configured to generate power using energy discharged from the hydraulic apparatus; a nonvolatile memory configured to store condition information indicating whether a condition of at least one of the hydraulic apparatus and the regeneration apparatus is normal or abnormal; a detection unit that detects the condition; a condition determination unit that generates condition information indicating whether the detected condition is normal or abnormal; an information comparison unit that compares the condition information generated by the condition determination unit with the condition information stored in the nonvolatile memory to determine whether or not content thereof is identical; and an updating unit that writes the condition information generated by the condition determination unit to the nonvolatile memory when a comparison result from the information comparison unit indicates that the content is different. | 05-14-2015 |
20150129378 | MAGNETORHEOLOGICAL FLUID DAMPER - A magnetorheological fluid damper using magnetorheological fluid, whose viscosity changes according to an intensity of a magnetizing field, as working fluid includes a cylinder in which magnetorheological fluid is sealed, a piston which is slidably arranged in the cylinder, a first fluid chamber and a second fluid chamber which are partitioned by the piston, a main flow passage which is open on opposite end surfaces of the piston and allows communication between the first and second fluid chambers, an electromagnetic coil which generates a magnetizing field to be applied to the magnetorheological fluid flowing in the main flow passage, a bypass flow passage which is formed at a position less affected by the magnetizing field generated by the electromagnetic coil than the main flow passage, and a bypass branching portion which branches the bypass flow passage from the main flow passage. | 05-14-2015 |
20150128583 | TRAVEL CONTROL VALVE - A travel control valve includes a valve body and a spool. The valve body includes a first pump port connected on an upstream side from a drive control valve, a first connection port connected on a downstream side from the drive control valve, a second pump port connected to a second pump, and a second connection port connected to a second circuit system. The travel control valve can switch a communication opening between the first pump port and the first connection port to a large opening throttle position in which the communication opening remains smaller than that between the second pump port and the second connection port, and a small opening throttle position in which the communication opening remains smaller than that in the large opening throttle position. | 05-14-2015 |
20150108700 | SUSPENSION APPARATUS - A shock absorber of a suspension apparatus includes a pair of chambers, a flow passage connects the chambers such that a working fluid passes through the flow passage as the shock absorber expands and contracts, a damping force generation mechanism applies resistance to the working fluid passing through the flow passage, a bypass passage connects the chambers so as to bypass the flow passage, a variable throttle member that is inserted into the bypass passage to be capable of advancing and retreating in order to modify an opening of the bypass passage, an actuator drives the variable throttle member and includes an acting portion disposed on a back surface side of the variable throttle member, and a power transmission mechanism interposed between the acting portion and the variable throttle member in order to transmit a linear motion of the acting portion to the variable throttle member. | 04-23-2015 |
20150101900 | SUSPENSION DEVICE - A suspension device includes a partition wall body which partitions the outside of a hollow pipe into a working chamber and a reservoir first chamber, a first piston which partitions the working chamber into an extension-side first chamber and a contraction-side first chamber, a first flow passage which allows communication between the extension-side first chamber and the reservoir first chamber, an extension-side second chamber which communicates with the extension-side first chamber, a second piston which partitions the interior of the hollow pipe into a contraction-side second chamber and a reservoir second chamber, a first damping flow passage which allows communication between an extension-side chamber and a contraction-side chamber, and a second damping flow passage which allows communication between the contraction-side chamber and a reservoir. A cross-sectional area of the extension-side second chamber is larger than that of the hollow pipe. | 04-16-2015 |
20150097555 | RESOLVER - A resolver includes a resolver rotor that is provided in an outer circumference of the motor shaft and rotates integrally with the motor shaft, a resolver stator that has a plurality of coils and surrounds an outer circumference of the resolver rotor such that a rotational angle detection gap is provided between the outer circumference of the resolver rotor and the resolver stator, a housing that houses the resolver rotor and the resolver stator and has an opening for extracting wires of the coils in an outer circumference side of the resolver stator, a wire harnessing member provided to extend from the resolver stator to an outer side of the housing through the opening and consolidates wires of a plurality of the coils, and a cover member that covers a gap between the opening and the wire harnessing member. | 04-09-2015 |
20150096855 | SHOCK ABSORBER - A shock absorber includes a shock absorber body having a cylinder outer shell and a piston rod capable of going in/out of the outer shell and generating a damping force suppressing relative movement of the piston rod in an axial direction with respect to the outer shell, a cylindrical dust cover connected to the piston rod and allowing entry of the outer shell into an inside, and a cylindrical collar attached to the outer shell and arranged on an outer periphery of the piston rod. | 04-09-2015 |
20150096291 | FLUID PRESSURE CONTROL DEVICE - A fluid pressure control device includes a switching valve that operates in conjunction with a control valve by a pilot pressure to switch an operation of an operated check valve. The switching valve includes a spool that moves according to the pilot pressure of a pilot chamber, and a piston that is accommodated in the pilot chamber and imparts a thrust force to the spool upon receiving the pilot pressure. The piston includes a first piston that is slidingly accommodated in the pilot chamber and is acted upon by the pilot pressure, and a second piston whose distal end faces the spool and is inserted into an accommodating hole formed in the first piston. A spherical protrusion is provided on a center of either one of a bottom surface of the accommodating hole of the first piston and a back surface of the second piston. | 04-09-2015 |
20150089935 | CONTROL VALVE APPARATUS OF POWER SHOVEL - A control valve apparatus includes a second-working-actuator acceleration control valve connected to a first working control valve in parallel. The second-working-actuator acceleration control valve includes pilot chambers receiving a pilot pressure for switching first and second working control valves and a flow channel that guides a pressure fluid of a first pump port to an entrance port side of the second working control valve. The second-working-actuator acceleration control valve is switchable between a first priority position in which a pressure fluid is guided to the first working control valve with a higher priority than the second working control valve and a second priority position in which a pressure fluid is guided to the second working control valve with a higher priority than the first working control valve. | 04-02-2015 |
20150064030 | FLUID PRESSURE DRIVE UNIT - A fluid pressure drive unit is to supply a working fluid to and drive a fluid pressure actuator. The fluid pressure drive unit includes a fluid pressure pump for suctioning and discharging the working fluid, an electric motor for driving and rotating the fluid pressure pump, a power transmission mechanism for transmitting a power between a rotation shaft of the fluid pressure pump and a rotation shaft of the electric motor, and a circulation mechanism to be driven by the power transmitted by the power transmission mechanism, the circulation mechanism for guiding a lubricating fluid in the power transmission mechanism and cooling the electric motor. | 03-05-2015 |
20150060220 | SHOCK ABSORBER - A shock absorber includes a damper main body that has a tubular outer shell and a piston rod that advances and retreats freely into and from the outer shell, and that is configured to generate a damping force for suppressing relative movement in an axial direction between the piston rod and the outer shell. The shock absorber includes a tubular dust cover that is connected to the piston rod and is configured to allow the outer shell to advance into an interior thereof and a tubular extension cover that is attached to an outer shell side end of the dust cover in a condition where the outer shell is inserted therein. | 03-05-2015 |
20150059328 | FLUID PRESSURE DRIVE UNIT - A fluid pressure drive unit is to supply a working fluid to and drive a fluid pressure actuator. The fluid pressure drive unit includes a fluid pressure pump for suctioning and discharging the working fluid, an electric motor arranged in parallel to the fluid pressure pump, the electric motor for driving and rotating the fluid pressure pump, and a power transmission mechanism for transmitting a power between a rotation shaft of the fluid pressure pump and a rotation shaft of the electric motor. | 03-05-2015 |
20150054251 | SUSPENSION DEVICE - A suspension device intervenes between a vehicle body and a wheel in a vehicle. The suspension device includes an outer tube coupled to the vehicle body, an inner tube inserted into the outer tube so as to allow the inner tube to advance and retreat, and a wheel-side bracket that includes a tubular holding portion into which an end portion on the wheel side of the inner tube is inserted and couples the inner tube to the wheel. The holding portion includes an annular ring disposed on the outer tube side and having an inner peripheral surface standing along an outer peripheral surface of the inner tube. The ring includes an outer peripheral tapered surface formed on an outer peripheral surface of the ring continuously from the end portion on the outer tube side of the inner peripheral surface and having a diameter gradually expanded to the holding portion side. | 02-26-2015 |
20150053510 | CALIPER BRAKE APPARATUS - A caliper brake apparatus includes: a guide plate that supports a brake shoe; an anchor pin that supports the guide plate and is provided in a caliper main body to be free to advance and retreat; a piston provided in the caliper main body to be free to advance and retreat; a piston plate that is fixed to the piston and supported by the anchor pin; an elastic membrane that is provided so as to define a pressure chamber in the caliper main body, and that moves the brake shoe via the piston, the piston plate, and the guide plate; and an intermediate member disposed between the piston plate and the guide plate. The intermediate member is interposed between the piston plate and the guide plate such that a gap is formed between the piston plate and the guide plate. | 02-26-2015 |
20150047499 | FLUID PRESSURE CYLINDER - A cushion mechanism for decelerating a piston rod includes a holder fastened to an end surface of a cylinder portion fitted with an inner peripheral surface of a cylinder tube, an annular entry portion provided on the piston rod and advancing into the holder and the cylinder portion in the vicinity of the stroke end, a cushion passage leading a working fluid of the working chamber to a supply/discharge port, and an orifice plug fastened to the cushion passage, and the cushion passage includes an internal passage extending in a radial direction of the holder and to which the orifice plug is fastened, and the orifice plug is replaceable through a replacement port formed by penetrating the cylinder tube and communicating with the internal passage. | 02-19-2015 |
20150047335 | MIXER DRUM DRIVING APPARATUS - A mixer drum driving apparatus includes an auxiliary fluid pressure pump that is provided independently of a fluid pressure pump and is capable of supplying a working fluid to a fluid pressure motor so as to cause a mixer drum to perform agitation rotation, a plurality of motors configured to drive the auxiliary fluid pressure pump to rotate, and a control unit that controls rotation of the mixer drum. When an engine is stopped during the agitation rotation of the mixer drum, the control unit drives the auxiliary fluid pressure pump to rotate by operating the plurality of motors selectively in accordance with a load of the mixer drum. | 02-19-2015 |
20150044083 | VARIABLE CAPACITY TYPE VANE PUMP - A variable capacity type vane pump with a first fluid pressure chamber and a second fluid pressure chamber provided at opposite sides of a pivot point of a cam ring includes a control valve for controlling a drive pressure of working fluid introduced from a pump chamber to the second fluid pressure chamber, a suction pressure of the working fluid sucked into the pump chamber is constantly introduced to the first fluid pressure chamber, and the cam ring pivots in a direction to decrease a discharge capacity due to a pressure in the pump chamber acting on an inner peripheral cam surface during an operation to reduce the drive pressure, whereas the cam ring pivots in a direction to increase the discharge capacity during an operation to increase the drive pressure. | 02-12-2015 |
20150041263 | MAGNETIC VISCOUS FLUID DAMPER AND MANUFACTURING METHOD OF COIL ASSEMBLY USED THEREFOR - A magnetic viscous fluid damper includes: a cylinder; a piston that is slidably interposed within the cylinder; two fluid chambers that are partitioned by the piston; a hollow rod that is coupled to the piston; an electromagnetic coil that is formed with a magnet wire wound around the piston; two lead wires that extend from both ends of the magnet wire; and a coil assembly in which the electromagnetic coil and the two lead wires are embedded in a mold resin. The piston includes a hollow first core coupled to the rod and a second core that sandwiches the coil assembly with the first core. The two lead wires are passed through the inside of the first core and are electrically continuous with an electric wire passed through the inside of the rod. | 02-12-2015 |
20150040754 | FLUID PRESSURE CYLINDER - A cushion mechanism for decelerating a piston rod includes a holder fastened to an end surface of a cylinder portion fitted with an inner peripheral surface of a cylinder tube, a plurality of fastening bolts for fastening the holder to the cylinder portion, an annular entry portion provided on the piston rod and advancing into the holder and the cylinder portion in the vicinity of the stroke end, a cushion passage formed by penetrating at least one of the plurality of fastening bolts and allowing a working chamber and a discharge port to communicate with each other and leading a working fluid in the working chamber to a discharge port, and an orifice portion provided on the cushion passage and applying resistance to a flow of the working fluid. | 02-12-2015 |
20150040686 | TORQUE SENSOR - A torque sensor includes a magnetism generation portion that rotates together with a first shaft, a rotating magnetic circuit portion that rotates together with a second shaft, a fixed magnetic circuit portion fixed to a housing, a magnetism detector that detects a magnetic flux density guided from the magnetism generation portion to the fixed magnetic circuit portion through the rotating magnetic circuit portion in accordance with torsional deformation of the torsion bar, and a shield disposed between the rotating magnetic circuit portion and the magnetism detector in order to shield the magnetism detector magnetically. | 02-12-2015 |
20150040551 | FLUID PRESSURE PUMP MOTOR - A fluid pressure pump motor includes a supply/discharge passage where both a hydraulic fluid pumped in to a fluid pressure pump and a hydraulic fluid discharged from the fluid pressure motor flow, and a variable valve provided in the supply/discharge passage to control the fluid path area of the supply/discharge passage. The variable valve reduces the fluid path area of the supply/discharge passage for simultaneously actuating the fluid pressure pump and the fluid pressure motor to be smaller than the fluid path area for actuating only one of the fluid pressure pump and the fluid pressure motor. | 02-12-2015 |
20150034437 | DAMPING VALVE FOR SHOCK ABSORBER - A damping valve includes a valve disk, a retainer, an inner peripheral side flow passage configured to include a valve disk through hole formed in an inner peripheral side of the valve disk and a retainer through hole formed in the retainer and allowing communication between one and other chambers, an outer peripheral side flow passage formed in an outer peripheral side of the valve disk and allowing communication between the one and the other chambers, and a leaf valve in the form of an annular plate arranged on a side of the retainer opposite to the valve disk and configured to openably close the inner peripheral side flow passage by an outer peripheral part. A flow passage area of the retainer through hole is not smaller than that of the valve disk through hole. | 02-05-2015 |
20150034434 | DAMPING VALVE - In a damping valve having a partition that separates a first chamber and a second chamber, a valve seat that is formed on an end surface of the partition facing the first chamber or the second chamber; and a leaf valve whose outer-circumferential end portion is separably seated on the valve seat, the leaf valve has a plurality of orifices for allowing working fluid to flow therethrough in the outer-circumferential end portion, and the plurality of orifices are concentrated in an arbitrary region along a circumferential direction in the outer-circumferential end portion of the leaf valve. | 02-05-2015 |
20150033727 | HYBRID CONSTRUCTION MACHINE - A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branched off, first and second logic valves, a switching valve disposed in the other branch passage and switchable to a state where the assist pump is connected to the second supply passage on the upstream side of the second logic valve and a state where the second main pump is connected to the hydraulic motor, and a check valve. A poppet diameter of the first logic valve is smaller than that of the second logic valve. | 02-05-2015 |
20150033726 | HYBRID CONSTRUCTION MACHINE - A hybrid construction machine includes first and second main pumps, first and second supply passages, first and second circuit systems, a hydraulic motor, a motor generator, an assist pump, a joint passage connected to the assist pump and branching off, first and second logic valves, and a switching valve. The switching valve switches between a state where the assist pump is connected to the second supply passage and a state where the second main pump is connected to the hydraulic motor. The hybrid construction machine includes a bypass passage branching off from the other branch passage at the downstream of the switching valve. The bypass passage is connected to the second supply passage on the downstream side of the second logic valve. | 02-05-2015 |
20150028787 | CONVEYANCE CART - A conveyance cart includes: a body frame; a deck provided liftably against the body frame to load a burden; an electric actuator electrically driven to expand or contract to lift or lower the deck; a current detection element that detects an electric current value supplied to the electric actuator; and a PWM control element that drives the electric actuator in a pulse width modulation (PWM) control manner. The PWM control element increases an on-duty ratio input to the electric actuator if the electric current value detected by the current detection element exceeds a setting value when the deck is lifted. | 01-29-2015 |
20150027830 | SUSPENSION DEVICE - A suspension device includes a main body, and a stroke locking mechanism that locks expansion/contraction of the main body. The stroke locking mechanism includes: a tube member coupled to one of a vehicle body and a vehicle wheel; a partition wall body fixed inside the tube member so as to divide an interior of the tube member into a first chamber and a second chamber; a flow passage that connects the first chamber to the second chamber; a valve that cuts off the flow passage during stroke locking; and a shaft member coupled to the other of the vehicle body and the vehicle wheel and inserted into the first chamber to be capable of advancing and retreating. The first chamber is filled with a working fluid, and the working fluid is stored in the second chamber so as to form a reservoir portion. | 01-29-2015 |
20150022952 | BUSBAR - Disclosed is a busbar mounted on a board and electrically connected to an external element other than the board, including: a base portion; and a conductive pin body protruding from the base portion, wherein the base portion has a fixing portion where a fixing member for fixing the board and the base portion to each other is locked, and an engagement portion that extends from the fixing portion and is engaged with the board. | 01-22-2015 |
20150021130 | MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER - A magnetorheological fluid shock absorber includes a piston slidably arranged in a cylinder in which magnetorheological fluid is sealed. The piston includes a piston core which is attached to an end part of a piston rod and on the outer periphery of which a coil is provided, a flux ring which surrounds the outer periphery of the piston core and forms a flow passage for the magnetorheological fluid between the piston core and the flux ring, a first plate which is arranged on the outer periphery of the piston rod and specifies the position of one end of the flux ring in an axial direction with respect to the piston core, a second plate which is arranged on the inner periphery of the other end of the flux ring, and a first snap ring which is fitted to the inner periphery of the flux ring and fixes the second plate. | 01-22-2015 |
20150015352 | LINEAR ACTUATOR AND GROOVE FASHIONING METHOD FOR LINEAR ACTUATOR - A linear actuator includes a first tube, a second tube inserted into the first tube to be free to slide, a rod fixed at one end of the rod to the first tube, a rod guide provided on the other end of the rod so as to slide relative to the second tube, a plurality of permanent magnets held by the rod, a holder that is fitted into the second tube and holds a plurality of coils, a first chamber defined between one end of the holder and an end portion of the first tube, and a second chamber defined between the other end of the holder and the rod guide. An insertion hole which connects the first chamber to the second chamber and through which the rod passes is formed in the holder. A connecting groove that connects the first chamber to the second chamber is formed in the second tube to extend in an axial direction. | 01-15-2015 |
20150015090 | LINEAR ACTUATOR - A linear actuator that is configured to be extended/contracted by relatively displacing a first tube and a second tube in an axial direction, includes a rod that is provided inside the first tube, a plurality of permanent magnets that are held in the rod so as to be arranged in the axial direction; a stopper that is provided on a tip-end portion of the rod, a coil that is provided inside the second tube so as to face the permanent magnets, and a stopper receiving portion that is provided on the second tube so as to face the stopper, wherein the relative displacement between the first tube and the second tube in the extension direction is restricted by bringing an extension-direction-side end surface of the stopper into contact with the stopper receiving portion at a fully extended position. | 01-15-2015 |
20150014105 | ROTARY DAMPER - A rotary damper includes: a shaft having a hollow portion; a pair of side panels; a case provided between the pair of side panels; a vane provided on the shaft so as to divide a first chamber and a second chamber; a liquid chamber defined within the hollow portion; a first partition wall and a second partition wall housed in the hollow portion; a first side valve chamber that is defined by the first partition wall; a second side valve chamber that is defined by the second partition wall; a first side port that connects the first side valve chamber to a second liquid chamber; a second side port that connects the second side valve chamber to the second liquid chamber; a first side damping valve capable of opening and closing the first side port; and a second side damping valve capable of opening and closing the second side port. | 01-15-2015 |
20150013323 | CIRCUIT PRESSURE CONTROL DEVICE, HYDRAULIC CONTROL CIRCUIT USING CIRCUIT PRESSURE CONTROL UNIT, AND HYDRAULIC CONTROL CIRCUIT OF CONSTRUCTION MACHINE - A circuit pressure control unit includes a relief valve and a variable throttle valve. The relief valve is connected to a connecting passage communicating with an actuator upstream. The variable throttle valve is disposed upstream of the relief valve and is configured to change an opening degree thereof according to a control signal from a controller. | 01-15-2015 |
20150008082 | ROTARY DAMPER - A rotary damper includes: a shaft capable of rotating about a central axis; a pair of side panels that support the shaft rotatably; a case provided between the pair of side panels such that an operating chamber is defined in an interior thereof; a vane provided on the shaft such that a tip end thereof slides against an inner periphery of the case, thereby dividing the operating chamber into a first chamber and a second chamber; and a damping valve provided in the shaft to apply resistance to a flow of a fluid traveling between the first chamber and the second chamber. | 01-08-2015 |
20150008081 | MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER - A magnetorheological fluid shock absorber includes a piston slidably arranged in a cylinder in which magnetorheological fluid whose viscosity changes by the action of a magnetic field is sealed. The piston includes a piston core which is attached to an end part of the piston rod and on the outer periphery of which a coil is provided, a flux ring which surrounds the outer periphery of the piston core and forms a flow passage for the magnetorheological fluid between the piston core and the flux ring, a plate which is annularly formed, arranged on the outer periphery of the piston rod and attached to one end of the flux ring, and a stopper whose axial position is specified with respect to the piston rod and which sandwiches the plate between the piston core and the stopper. | 01-08-2015 |
20140361641 | LINEAR ACTUATOR AND TUBE ASSEMBLY METHOD FOR LINEAR ACTUATOR - A linear actuator includes a first tube and a second tube inserted into the first tube to be free to slide. The first tube includes an outer tube and a cap provided detachably on an end portion of the outer tube, while the second tube includes a base portion and an inner tube provided detachably on the base portion and inserted into the outer tube to be free to slide. A first sliding member that slides against an outer periphery of the inner tube is provided on an inner periphery of one end of the outer tube. A second sliding member that slides against an inner periphery of the outer tube is provided on an outer periphery of an end portion of the inner tube corresponding to the other end of the outer tube. | 12-11-2014 |
20140360351 | FLUID PRESSURE ROTARY MACHINE - A fluid pressure rotary machine includes a cylinder block that is fixed to a rotary shaft and includes a plurality of cylinder bores, a piston disposed to be free to slide in each cylinder bore such that a volume chamber is defined thereby, a swash plate that causes the piston to reciprocate such that the volume chamber expands and contracts, and a valve plate that slides against the cylinder block and includes an intake port and a discharge port communicating with the volume chamber. The valve plate includes a sliding surface formed to project in a spherical shape against the cylinder block. The cylinder block includes a sliding surface formed as an indentation corresponding to the shape of the sliding surface of the valve plate. A minute gap is formed between the sliding surface of the valve plate and the sliding surface of the cylinder block in an outer edge position. | 12-11-2014 |
20140339926 | LINEAR ACTUATOR - A linear actuator that is configured such that a first tube and a second tube are relatively displaced in an axial direction, includes a rod that is provided in the first tube and whose one end is fixed to an end portion of the first tube, a plurality of permanent magnets that are held by the rod so as to be arranged in the axial direction, and a tubular coil holder that is provided in the second tube and holds a coil that faces the permanent magnets, wherein the first tube has a first linear guide portion with a cylindrical surface that extends in the axial direction around the coil holder, and the second tube has a second linear guide portion with a cylindrical surface that is faced to the first linear guide portion without a gap therebetween so as to be slidably fitted therewith. | 11-20-2014 |
20140339034 | DAMPING VALVE - A damping valve includes an annular valve seat, a valve body, an actuator for driving the valve body and a valve case including a valve hole into which the valve body is slidably inserted. The valve body includes a valve main body and a shaft for transmitting a thrust force of the actuator to the valve main body. The valve main body includes a flange partitioning the interior of the valve hole into a valve seat side chamber and an opposite valve seat side chamber, a shaft portion extending from the flange and a valve head to be seated on and lifted from the valve seat. The valve seat side chamber and the opposite valve seat side chamber communicate via a communication passage and the valve seat side chamber and the flow path communicate via a throttle passage. | 11-20-2014 |
20140328700 | SWASH PLATE TYPE PISTON PUMP - A swash plate type piston pump includes a plurality of pistons, a cylinder block including a plurality of cylinders for housing the pistons, a swash plate for reciprocating the pistons to expand and contract volume chambers of the cylinders with the rotation of the cylinder block, a biasing mechanism for biasing the swash plate in a direction to increase a tilting angle, a first control pin for driving the swash plate in a direction to reduce the tilting angle according to a first load pressure, and a second control pin for driving the swash plate in a direction to reduce the tilting angle according to a second load pressure. The first and second control pins are connected in series. | 11-06-2014 |
20140318411 | RAILWAY VEHICLE DAMPING DEVICE - A railway vehicle damping device comprises at least two front side actuators interposed between a front bogie and a vehicle body of a railway vehicle, and at least two rear side actuators interposed between a rear bogie and the vehicle body of the railway vehicle, and suppresses vibration in a yaw direction of the vehicle body using a yaw suppression force generated by the actuators. After determining that the railway vehicle is traveling in a curve section, a control device causes at least one of the front side actuators and at least one of the rear side actuators to generate a yaw suppression force, and causes all of the remaining actuators to function as passive dampers. As a result, passenger comfort in the railway vehicle during travel in the curve section is improved. | 10-30-2014 |
20140265254 | CONVEYANCE CART - A conveyance cart that can convey a loaded burden, includes: a body frame supported by a wheel; a deck provided liftably against the body frame to load a burden; an electric actuator electrically driven to expand or contract to lift or lower the deck; and a controller that is configured to supply an electric current to the electric actuator. The controller stops supply of an electric current to the electric actuator when a continuous driving time of the electric actuator is equal to or longer than a predetermined time. | 09-18-2014 |
20140257606 | RAILWAY VEHICLE VIBRATION DAMPING DEVICE - A railway vehicle vibration damping device having at least two vibration suppression force generating sources interposed between a bogie and a vehicle body of a railway vehicle extracts from a transverse direction velocity of the vehicle body a frequency component at or above a frequency of a centrifugal acceleration of the vehicle body, and calculates a high frequency vibration suppression force on the basis thereof. When the railway vehicle travels in a curve section, at least a part of the vibration suppression force generating sources is caused to output the high frequency vibration suppression force, and the remaining vibration suppression force generating sources are caused to function as passive dampers. As a result, passenger comfort in the railway vehicle during travel in a curve section is improved. | 09-11-2014 |
20140251704 | ELECTRIC ASSIST CART - An electric assist cart includes: a body frame where a burden can be loaded; a drive wheel provided in the body frame; a control handle by which an operator can input a driving force to the body frame; a torque sensor that detects a driving torque applied to the body frame by pushing and handling the control handle; an electric motor that applies an assisting force to the drive wheel depending on the driving torque detected by the torque sensor; and a controller that computes the assisting force applied to the drive wheel and supplies an electric current to the electric motor depending on the assisting force, wherein the controller has a plurality of modes having different characteristics for a change of a magnitude of the electric current depending on the driving torque, and the electric current can be supplied to the electric motor by switching the mode. | 09-11-2014 |
20140249705 | RAILWAY VEHICLE VIBRATION DAMPING DEVICE - Two or more front-side vibration suppression force generation sources and two or more rear-side vibration suppression force generation sources are interposed between bogies and the vehicle body. A controller calculates a sway high-frequency vibration suppression force for suppressing vibration having a frequency which is not less than a frequency of a centrifugal acceleration acting on the vehicle body when the railway vehicle runs in a curve section. The controller lets at least a part of the front-side vibration suppression force generation sources and at least a part of the rear-side vibration suppression force generation sources output a resultant force of a yaw suppression force and the sway high-frequency vibration suppression force. The controller lets all the remaining vibration suppression force generation sources function as passive dampers when the railway vehicle runs in the curve section. Ride quality of the vehicle in the curve section is thereby improved. | 09-04-2014 |
20140246261 | ELECTRIC ASSIST CART - An electric assist cart includes: a drive wheel provided in a body frame; a control handle used by an operator to input a driving force to the body frame; a torque sensor that detects a driving torque applied to the body frame from the control handle; a controller that computes an assisting force applied to the drive wheel based on the driving torque; an electric motor that applies the assisting force to the drive wheel; a brake that brakes the drive wheel and switches from a braking state to an unbraking state when a predetermined electric current flows; and a brake release switch manipulated by an operator to allow the controller to instruct the predetermined electric current to flow to the brake, wherein the controller maintains the braking state of the brake even when the brake release switch is manipulated without turning on power, and power is then turned on. | 09-04-2014 |
20140234150 | VANE PUMP - A vane pump includes a rotor, slits which are radially formed in the rotor, vanes which slidably project from the slits, vane back pressure chambers which are defined between the base end parts of the vanes and the slits, a cam ring with which the tip parts of the vanes slide in contact, a pump chamber which is defined among the cam ring, the rotor and adjacent vanes, a vane ring which faces the base end parts of the vanes, a vane ring housing chamber on which one end of each slit is open and in which the vane ring is housed, and vane ring opposite pressure chambers on which the other ends of the slits are open and which cause a fluid pressure to act in a direction to push the rotor toward the vane ring. | 08-21-2014 |
20140202809 | SEALING DEVICE AND SHOCK ABSORBER WITH THE SEALING DEVICE - A sealing device adapted to seal an outer periphery of a shaft member inserted into a tubular member includes a dust seal lip arranged on an outer side of the tubular member and an oil seal lip arranged on an inner side of the tubular member to form a space for accumulating working fluid between the oil seal lip and the dust seal lip. The dust seal lip includes a main lip portion and an auxiliary lip portion formed to be closer to the oil seal lip than the main lip portion. A maximum value of a surface pressure gradient absolute value of the inner side in the auxiliary lip portion is set to be larger than that of a surface pressure gradient absolute value of the outer side in the auxiliary lip portion. | 07-24-2014 |
20140198599 | MIXER TRUCK - A mixer truck includes: a mixer drum capable of carrying ready-mixed concrete; a driving device that drives the mixer drum to rotate using an oil pressure of a working oil; a pressure sensor that detects a driving condition of the mixer drum driven by the driving device; a controller that determines a magnitude of rotation unevenness in the mixer drum by comparing a magnitude of variation in the driving condition detected by the pressure sensor with a predetermined set value after the ready-mixed concrete in the mixer drum has been discharged; and a notifying device that notifies a driver that the magnitude of the rotation unevenness in the mixer drum has reached an allowable value when the controller determines that the magnitude of the variation in the driving condition detected by the pressure sensor has reached the set value. | 07-17-2014 |
20140197297 | BOOM SPRAYER AND BOOM RAISING AND LOWERING DEVICE - A boom raising and lowering device that is configured to raise and lower a boom includes a raising and lowering mount that is provided so as to be able to be raised and lowered with respective to the working vehicle, a roll mount that is provided on the raising and lowering mount so as to be rotatable in a roll direction and that supports the boom in a cantilever-supported manner, a first raising and lowering actuator that drives one end of the roll mount in the vertical direction with respective to the working vehicle, and a second raising and lowering actuator that drives other end of the roll mount in the vertical direction with respective to the working vehicle. The boom is driven in the vertical direction and roll direction by operating the first raising and lowering actuator and the second raising and lowering actuator. | 07-17-2014 |
20140197179 | HIGH PRESSURE GAS CONTAINER AND MANUFACTURING METHOD FOR HIGH PRESSURE GAS CONTAINER - This invention is a high pressure gas container into which a high pressure gas is charged, includes: a liner into which the high pressure gas is charged; and a reinforcing sleeve that envelops an outer surface of the liner, wherein the liner includes: a cylindrical liner trunk portion; and a pair of liner shoulder portions formed by reducing a diameter of respective end portions of the liner trunk portion, and the reinforcing sleeve includes: a sleeve trunk portion fitted to the liner trunk portion; and a pair of sleeve shoulder portions that extend from the sleeve trunk portion so as to contact the respective liner shoulder portions. | 07-17-2014 |
20140196996 | BOOM SPRAYER AND BOOM VIBRATION CONTROL DEVICE - A boom vibration control device that is configured to suppress vibration of a boom that is cantilever-supported on a working vehicle includes a left-roll-direction biasing unit that biases the boom in the left roll direction with respective to the working vehicle and right-roll-direction biasing unit that biases the boom in the right roll direction with respective to the working vehicle. The boom is held at the roll angle at which the biasing force of the left-roll-direction biasing unit and the biasing force of the right-roll-direction biasing unit are balanced. | 07-17-2014 |
20140196628 | RAILCAR DAMPING DEVICE - A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber and a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber and the tank to be capable of opening and closing the second passage; a pump that is driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber; and a temperature determination unit that determines a temperature of the liquid supplied to the actuator, wherein a rotation speed of the pump is reduced below a normal rotation speed when the temperature determination unit determines that the temperature of the liquid is lower than a predetermined temperature. | 07-17-2014 |
20140196627 | RAILCAR DAMPING DEVICE - A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber to a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber to the tank to be capable of opening and closing the second passage; and a pump that is driven to rotate at a predetermined normal rotation speed in order to supply the liquid from the tank to the rod side chamber, wherein a rotation speed of the pump is reduced when a thrust command value is smaller than a normal lower limit value, which is a lower limit value of a thrust that can be generated by the actuator when the pump is rotated at the normal rotation speed. | 07-17-2014 |
20140169995 | ELECTRIC OIL PUMP - An electric oil pump includes an electric motor and an oil pump that is driven by the motive power from an electric motor, wherein; the oil pump has an introducing channel that guides a drain oil that has leaked from an interior of the oil pump to an interior of the electric motor; and the electric motor has a discharging channel that discharges the drain oil that has been guided to the interior of the electric motor to a tank. | 06-19-2014 |
20140167380 | FRONT FORK - A front fork includes a fork body having an outer tube and an inner tube relatively movably inserted into the outer tube in an axial direction, a damper housed in the fork body to dampen relative movement between the outer and inner tubes, a biasing member that biases the fork body in an expansion direction at all times, an annular dust seal that is held in the outer tube and makes sliding contact with an outer circumference of the inner tube, an annular oil seal that is held in the outer tube inside the fork body to be inner than the dust seal and makes sliding contact with the outer circumference of the inner tube, and a C-shaped scraper that is provided between the dust seal and the oil seal and makes sliding contact with the outer circumference of the inner tube. | 06-19-2014 |
20140138198 | DAMPER - A damper includes a vehicle-body-side mounting portion, an axle-side mounting portion, and a vehicle height adjusting mechanism for adjusting a distance between the vehicle-body-side mounting portion and the axle-side mounting portion. The vehicle height adjusting mechanism includes a first tubular member formed into a bottomed tubular shape, a second tubular member formed into a bottomed tubular shape and inserted from the bottom side into the first tubular member, and a stopper member having a shaft portion and a locking portion provided at a proximal end of the shaft portion. A distal end of the shaft portion is fixed to the bottom of the first tubular member. The shaft portion is inserted through a hole formed in the bottom of the second tubular member. The locking portion abuts on the bottom of the second tubular member. | 05-22-2014 |
20140124314 | SHOCK ABSORBER - A shock absorber includes a damping force adjustment mechanism having a flow passage that allows the fluid from a cylinder, a valve seat, a valve body, and a stepper motor that adjusts a flow passage area by driving the valve body. A valve body position in which step-out may occur in the stepper motor if the valve body is moved further toward the valve seat therefrom is set as a step-out boundary position, a zone between a seated position in which the valve body is seated on the valve seat and the step-out boundary position is set as a step-out zone, and when the valve body is to be moved to the seated position through the step-out zone, the stepper motor is energized to move the valve body by a distance that is at least twice a distance to the seated position. | 05-08-2014 |
20140124311 | DAMPER WITH A VEHICLE HEIGHT ADJUSTING FUNCTION - A damper with a vehicle height adjusting function includes a damper body and a vehicle height adjusting mechanism adapted to adjust an axial length of the damper body. The damper body includes a cylinder, a head member having an annular shape and closing one end of the cylinder, a piston rod axially supported on an inner periphery of the head member and inserted in the cylinder so as to be movable in an axial direction, and a piston retained by the piston rod and partitioning an inside of the cylinder into two pressure chambers. The vehicle height adjusting mechanism includes a partition wall member defining a jack chamber in one of the pressure chambers and being capable of extending and contracting in the axial direction, and a pump supplying/discharging a working fluid into/from the jack chamber. | 05-08-2014 |
20140116828 | SHOCK ABSORBER - At least one of fluid paths of a shock absorber is a bypass path including: a one-side opening opened to a chamber in one side; the other-side opening opened to a chamber in the other side; a one-side shaft member fluid path that is connected to the one-side opening and passes through an inner side of the shaft member; the other-side shaft member fluid path that is connected to the other-side opening and passes through the inner side of the shaft member; and a support member fluid path formed inside the support member to connect the one-side shaft member fluid path and the other-side shaft member fluid path. The valves provided in the bypass path are housed in the support member. | 05-01-2014 |
20140116827 | MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER - A magnetorheological fluid shock absorber that uses a magnetorheological fluid having a viscosity includes: a tubular cylinder formed from a non-magnetic material and having the magnetorheological fluid sealed into an inner periphery thereof; a piston formed from a non-magnetic material and disposed in the cylinder to be free to slide at an interval, through which the magnetorheological fluid can pass, relative to the inner periphery of the cylinder; a piston rod to which the piston is connected; and a magnet portion attached to the cylinder in order to apply a magnetic field to an interior of the cylinder. The magnet portion includes a permanent magnet having an inner peripheral shape that aligns with an outer periphery of the cylinder; and a ring member formed from a magnetic material and disposed on an outer peripheral side of the permanent magnet. | 05-01-2014 |
20140116826 | RAILCAR DAMPING DEVICE - A railcar damping device includes: a tank storing a liquid; a first opening/closing valve provided in a first passage connecting a rod side chamber to a piston side chamber, which are defined by a piston, to be capable of opening and closing the first passage; a second opening/closing valve provided in a second passage connecting the piston side chamber to the tank to be capable of opening and closing the second passage; a pump that supplies the liquid from the tank to the rod side chamber; a motor that rotates at a fixed rotation speed in order to drive the pump to rotate; and a section determination unit that determines whether a section type of a current travel section of the railcar is an open section or a tunnel section on the basis of a speed deviation between a target rotation speed and an actual rotation speed of the motor. | 05-01-2014 |
20140110200 | MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER - A magnetorheological fluid shock absorber that uses a magnetorheological fluid having a viscosity, includes: a tubular cylinder formed from a non-magnetic material, in which the magnetorheological fluid is sealed; a piston formed from a non-magnetic material and disposed in the cylinder to be free to slide at an interval, through which the magnetorheological fluid can pass, relative to an inner periphery of the cylinder; a piston rod to which the piston is connected; and a magnet portion attached to the cylinder in order to apply a magnetic field to an interior of the cylinder, wherein the magnet portion includes a pair of permanent magnets that are respectively formed in an arc shape having an inner peripheral shape that aligns with an outer periphery of the cylinder, magnetized in a circumferential direction, and disposed so as to face each other about a central axis of the cylinder. | 04-24-2014 |
20140107880 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A controller is connected to a pressure sensor. The controller controls a regulator of a sub-pump in accordance with a pressure signal from the pressure sensor, detects an output of a main pump, and controls an output of an electric motor according to the output of the main pump based on a table stored beforehand. | 04-17-2014 |
20140091552 | MOTORCYCLE - A motorcycle includes a seat supported on a pair of seat frames of a vehicle body frame. A rear wheel is disposed under the pair of seat frames in a side view of the motorcycle, and is swingable in an up-down direction. A damper includes a hydraulic jack to adjust the vehicle height. The pump unit includes a hydraulic pump to feed oil to the hydraulic jack and a vehicle height adjusting motor to drive the hydraulic pump. The vehicle height adjusting motor is located under the seat, and disposed between the pair of seat frames in a plan view of the motorcycle. | 04-03-2014 |
20140091539 | ELECTRIC SUSPENSION DEVICE AND MOTORCYCLE - An electric suspension device includes a cylinder, a sub-tank, a first oil passage and a second oil passage, a damping force adjusting valve, and a damping force adjusting motor. The cylinder is rotatable about a mounting axis. The first oil passage connects a first inner oil chamber and an outer oil chamber. The second oil passage connects the first inner oil chamber of the cylinder and an oil chamber of the sub-tank. The first and second oil passages are disposed outside an inner tube and an outer tube, and share a portion with each other. The first and second oil passages are entirely disposed on the same side with respect to a reference plane. | 04-03-2014 |
20140083807 | VIBRATION DAMPING DEVICE FOR RAILWAY VEHICLE - A vibration damping device for railway vehicle includes an actuator and a damper circuit that causes the actuator to function as a damper. The actuator includes a cylinder coupled to a truck of a railway vehicle, a piston, a rod coupled to the piston and a body, a rod-side chamber and a piston-side chamber inside the cylinder, a first on-off valve for a first passage that communicates between a rod-side chamber and a piston-side chamber, a second on-off valve for a second passage that communicates between the piston-side chamber and a tank, and a pump that supplies a hydraulic fluid into the rod-side chamber. The hydraulic fluid has such kinematic viscosity-temperature characteristics that a kinematic viscosity of the hydraulic fluid ranges from 7 mm | 03-27-2014 |
20140076677 | VALVE STRUCTURE - A valve structure includes a valve disc partitioning an interior of a damper into a one-side chamber and an other-side chamber, a plurality of one-side ports and a plurality of other-side ports communicating between the one-side chamber and the other-side chamber, a one-side leaf valve opening and closing only the one-side ports, and an other-side leaf valve opening and closing only the other-side ports, the one-side ports and the other-side ports are alternately arranged in the valve disc along the circumferential direction, and a plurality of through holes formed in the valve disk is opened from the inner circumferential side of openings of all the other-side ports and communicates with the one-side ports. | 03-20-2014 |
20140054117 | CALIPER BRAKE DEVICE FOR VEHICLE - A caliper brake device includes a brake shoe for exerting a friction force by sliding in contact with a disk, a caliper main body fixed to a vehicle and an actuator for pressing the brake shoe against the disk. The actuator includes an elastic film fixed to the caliper main body, a drive pressure chamber defined by the elastic film and supplied with a fluid, a valve introducing the fluid to the drive pressure chamber, and a piston interposed between the elastic film and the brake shoe. The fluid is supplied to the drive pressure chamber and the elastic film swells toward the brake shoe, whereby the piston brings the brake shoe into sliding contact with the disk. The valve introduces the fluid to the drive pressure chamber when the brake is applied while limiting the discharge of the fluid from the drive pressure chamber when the brake is released. | 02-27-2014 |
20140019009 | STEERING-SHAFT-ROTATION-ANGLE DETECTION DEVICE - A steering-shaft-rotation-angle detection device that detects a rotation angle of a steering shaft that is rotated by operation of a steering wheel, includes an electric motor that assists steering of the steering wheel by a driver, a speed reduction mechanism that reduces speed of rotation of the electric motor and transmits the rotation to the steering shaft, a rotating body that is attached to a rotation shaft of the electric motor, a signal output unit that outputs a signal in accordance with rotation of the rotating body, and a controller that calculates a rotation angle of the rotating body on the basis of the output signal from the signal output unit and calculates, on the basis of this rotation angle and a speed reduction ratio of the speed reduction mechanism, a rotation angle of the steering shaft. | 01-16-2014 |
20140015315 | MIXER DRUM DRIVING APPARATUS - A mixer drum driving apparatus having a mixer drum carried on a frame of a mixer truck to be free to rotate and a drive source configured to drive the mixer drum to rotate includes a rotary motor configured to drive the mixer drum to rotate as the drive source, a power supply configured to supply power to the rotary motor, and a power generator configured to generate power as the mixer drum rotates and charge the generated power to the power supply. | 01-16-2014 |
20140013736 | MIXER DRUM DRIVING DEVICE - A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. The auxiliary hydraulic pump is driven and rotated by the direct-current brush motor when the engine stops during the rotation of the mixer drum for mixing. | 01-16-2014 |
20140010035 | MIXER DRUM DRIVING APPARATUS - A mixer drum driving apparatus includes a mixer drum carried on a frame of a mixer truck in a frontward tilted condition to be free to rotate, and a drive source configured to drive the mixer drum to rotate. The drive source includes a motor which is disposed in a space between a rear portion of the mixer drum and a rear portion of the frame in order to drive the mixer drum to rotate. | 01-09-2014 |
20140007701 | TORQUE SENSOR - In a torque sensor that detects torque acting on a torsion bar on the basis of a magnetic flux density conducted to a magnetism collecting ring provided in a housing, the magnetism collecting ring is an annular member formed such that an axial direction end portion thereof is thinner than a central portion. The housing includes an annular groove formed to be capable of accommodating the magnetism collecting ring and provided as a recess in an inner peripheral wall of the housing so as to be deeper than a thickness of the end portion of the magnetism collecting ring, and a caulk portion provided in the inner peripheral wall to caulk the magnetism collecting ring by covering the end portion of the magnetism collecting ring that is fitted into the annular groove. | 01-09-2014 |
20140000997 | DAMPING VALVE | 01-02-2014 |
20130341139 | SHOCK ABSORBER - A shock absorber that absorbs a vibration using a working fluid charged into a first chamber and a second chamber comprises a tube body, an inserted body, a tip end of which is inserted into the tube body from an end portion of the tube body, and a partition wall portion that is provided on the tip end of the inserted body to be capable of sliding within the tube body and partitions an interior of the tube body into the first chamber and the second chamber. The shock absorber comprises a connecting portion that is provided within a partition wall portion sliding region of the tube body and connects the first chamber and the second chamber when the partition wall portion passes thereby. | 12-26-2013 |
20130294191 | MIXER DRUM APPARATUS - A mixer drum apparatus to stir material to be stored includes a freely-rotatable drum having an opening end opened at one end to receive the material to be stored therein, a plurality of spirally-shaped blades provided inside the drum to have a phase difference, and an inlet seal provided at the opening end of the drum and connected partially to the blades. The inlet seal located between the blades forms an opening causing the material to be stored to pass through. | 11-07-2013 |
20130280118 | VANE PUMP - A vane pump including a cam ring, a rotor, slits formed in the rotor, vanes inserted slidably into the slits, pump chambers defined by the vanes, back pressure chambers defined between respective base end portions of the vanes and the slits, back pressure grooves capable of communicating with the back pressure chambers as the rotor rotates, and connecting grooves connecting back pressure grooves that are adjacent in a circumferential direction of the rotor to each other, wherein a connecting groove that communicates with a back pressure groove positioned in a suction region formed above a rotary center of the rotor so as to suction a working fluid into the pump chambers is formed to have a larger passage sectional area than a connecting groove that communicates with another back pressure groove positioned in another suction region formed below the rotary center of the rotor. | 10-24-2013 |
20130270927 | LINEAR ACTUATOR - A linear actuator is provided with an outer tube and an inner tube inserted in the outer tube so as to be free to slide axially. A rod is erected at a central axis part of the inner tube, forming an annular space between the rod and the inner tube. Permanent magnets are retained along an axial direction in the rod, and a holder is fixed to the outer tube for retaining coils which are disposed face to face with the permanent magnets. The holder includes a cylindrical coil holding portion inserted in the annular space such that an extreme end of the cylindrical coil holding portion can move further into and backward from the annular space. The coil holding portion retains the coils within an inner peripheral surface, and a flange portion joined directly to a proximal end of the coil holding portion is fixed to the outer tube. | 10-17-2013 |
20130257012 | TWO-WHEELED MOTOR VEHICLE AND FRONT FORK FOR THE SAME - In a two-wheeled motor vehicle having a pair of right and left front forks for supporting a front wheel so that the front wheel is rotatable, a top bridge for supporting upper ends of the pair of right and left front forks, a handle post provided to the top bridge, and a bar-shaped handle secured to the hand post, the handle is provided above the front forks with respect to an axial line direction of the front forks, each front fork is provided with an air valve for sealingly filling air in the front fork and a projection on the upper surface thereof, and the projection is formed to be higher than the air valve. | 10-03-2013 |
20130248306 | VIBRATION CONTROL DEVICE FOR RAILROAD VEHICLE - A vibration control device for railroad vehicle includes an actuator with a cylinder coupled to a truck of a railroad vehicle, a piston, a rod coupled to the piston and a vehicle body, a rod-side chamber and a piston-side chamber in the cylinder, a tank, a first on-off valve disposed at an intermediate position of a first passage communicating between the rod-side chamber and the piston-side chamber, a second on-off valve disposed at an intermediate position of a second passage communicating between the piston-side chamber and the tank, and a pump for supplying fluid to the rod-side chamber. A warm-up operation of the actuator is performed by opening the first and second on-off valves and driving the pump after the vibration control device is started and before a transition is made to a normal control mode for suppressing the vibration of the vehicle body. | 09-26-2013 |
20130197755 | SUSPENSION DEVICE - A suspension device includes damper interposed between vehicle body and wheel in vehicle and exerted damping force for suppressing vertical movements of vehicle body and wheel, damping force adjustment mechanism adjusts damping force, control device controls damping force adjustment mechanism, lateral acceleration detection unit detects an lateral acceleration acting on vehicle body, roll angular velocity detection unit detects roll angular velocity of vehicle body, and steering angular velocity detection unit detects steering angular velocity of steering wheel. The control device sets maximum damping force out of damping force calculated from steering angular velocity, damping force calculated from lateral acceleration and damping force calculated from roll angular velocity as steering initial stage additional damping force, calculates final damping force of damper using steering initial stage additional damping force and performs steering initial stage control of controlling damper when steering angular velocity exceeds predetermined dead band. | 08-01-2013 |
20130195689 | FRONT FORK - A front fork includes a body side tube, an axle side tube, a damper, a reservoir, a damping force adjusting flow passage, and a solenoid valve including a spool housing portion provided at an intermediate position of the damping force adjusting flow passage, a spool valve inserted into the spool housing portion movably in an axial direction, and a solenoid that drives the spool valve in an axial direction, and configured to adjust a flow passage area of the damping force adjusting flow passage. Pressure receiving areas on opposite axial sides of the spool valve on which a pressure in an upstream side of the damping force adjusting flow passage acts are made equal. An upper arrangement passage which is arranged at least higher than the upper end of the spool housing portion is provided in a downstream side of the damping force adjusting flow passage. | 08-01-2013 |
20130181548 | LINEAR ACTUATOR - A linear actuator is provided with an outer tube and an inner tube inserted in the outer tube so as to be free to slide. The linear actuator is also provided with a rod erected at a central axis part of the inner tube and forming an annular space between the rod and the inner tube, a rod guide which slides along an inner surface of the outer tube and guides the rod along an axial direction, a plurality of permanent magnets arranged along the axial direction in the rod, and a plurality of coils retained by the outer tube so as to face the permanent magnets. A cooling fluid is filled in an internal space formed between the outer tube and the inner tube. | 07-18-2013 |
20130175887 | LINEAR ACTUATOR - A linear actuator is provided with an outer tube and an inner tube inserted in the outer tube so as to be free to slide. The linear actuator is also provided with a rod erected at a central axis part of the inner tube and forming an annular space between the rod and the inner tube, a rod guide provided at an extreme end of the rod in sliding contact with an inner surface of the outer tube, a plurality of permanent magnets arranged along an axial direction in the rod, and a plurality of coils retained by the outer tube so as to face the permanent magnets. A cross-sectional area of an outer periphery of the inner tube along which the outer tube slides and a cross-sectional area of an inner periphery of the outer tube along which the rod guide slides are set to be equal. | 07-11-2013 |
20130175886 | LINEAR ACTUATOR - A linear actuator for generating a thrust force for relatively displacing an outer tube and an inner tube in an axial direction includes a rod standing in an axial center part of the inner tube, a plurality of permanent magnets held side by side in an axial direction by the rod, a plurality of coils facing the permanent magnets, and a holder that is fixed to the outer tube and holds the plurality of coils. The holder includes a tubular coil holding portion that is provided in an annular space formed between the rod and the inner tube and holds the coils. A clearance is formed between the outer periphery of the coil holding portion and the inner periphery of the inner tube. | 07-11-2013 |
20130154233 | FRONT FORK - A front fork includes a damper that generates a damping force, a cylinder body that houses the damper, a reservoir formed on an exterior of the cylinder body, a rod body that is inserted into the cylinder body to be capable of advancing and retreating, a piston portion that defines an upper chamber and a lower chamber within the cylinder body, a through hole allows a working fluid to flow from the cylinder body into the reservoir, a flow rate control mechanism that is disposed in the vehicle body side tube to face an upper end opening of the through hole, and applies a resistance to a flow of the working fluid flowing toward the reservoir from the rod body, and a driving mechanism that drives the flow rate control mechanism to adjust an expansion side damping force and a contraction side damping force generated by the damper. | 06-20-2013 |
20130153348 | SHOCK ABSORBER - A shock absorber includes a shock absorber main body composed of a vehicle-body side tube and a wheel side tube and formed with a lubrication clearance, a damper including a cylinder, a piston which partitions the interior of the cylinder into two working chambers, and a rod, a reservoir chamber composed of an air chamber and a working fluid chamber, a partition wall member for partitioning the working fluid chamber into an upper working fluid chamber and a lower working fluid chamber, a flow path having a check valve for permitting only a movement of the working fluid from the upper working fluid chamber to the lower working fluid chamber, and a communication path for allowing communication between the lower working fluid chamber and the lubrication clearance. A cross-sectional area of the lubrication clearance and that of the rod are different. | 06-20-2013 |
20130134688 | DAMPER - Damper is provided with damper main body including cylinder, piston being slidably inserted into cylinder to partition interior of cylinder into extension and compression chambers, and piston rod being inserted into cylinder to be coupled to piston, and damping force adjustment mechanism including flow path permitting passage of fluid only during either extension or contraction, valve seat being provided at intermediate position of flow path, valve body being movable back and forth relative to valve seat, and motor driving and moving valve body back and forth relative to valve seat to adjust flow path area of flow path. Damper energizes motor to move valve body distance, which is two-fold or more of distance from separated position where valve body is separated from valve seat to seated position where valve body is seated on valve seat, when flow path is blocked by moving valve body from separated position to seated position. | 05-30-2013 |
20130113165 | PISTON BEARING STRUCTURE FOR FLUID PRESSURE CYLINDER - A piston bearing structure for a fluid pressure cylinder includes one seal ring which is housed in a housing groove of a piston and is held in sliding contact with a cylinder tube and two backup wear rings which is housed in a housing groove of a piston, is held in sliding contact with a cylinder tube and sandwiches the seal ring. The backup wear ring includes a pressure relief groove which faces the housing groove and extends over the backup ring portion and the wear ring portion, and the pressure relief groove allows opposite sides of the backup wear ring to communicate between the piston and the cylinder tube. | 05-09-2013 |
20130111892 | MIXER DRUM DRIVING DEVICE - A mixer drum driving device includes a hydraulic motor that rotates a mixer drum, a first hydraulic pump that is driven by an engine to be capable of supplying working oil to the hydraulic motor, an electric motor, a power supply connected to the electric motor, a second hydraulic pump capable of supplying the working oil to the hydraulic motor on the basis of a driving force of the motor, and a flow dividing valve that divides the working oil discharged from the first hydraulic pump and supplies the working oil to the hydraulic motor and the second hydraulic pump. The second hydraulic pump is configured to rotate the electric motor using the working oil. The electric motor is configured to generate electric power so as to charge the power supply when driven to rotate by the second hydraulic pump. | 05-09-2013 |
20130105261 | DAMPING VALVE FOR SHOCK ABSORBER | 05-02-2013 |
20130090811 | APPARATUS AND METHOD FOR ADJUSTING ELECTRIC POWER STEERING DEVICE - An adjusting apparatus for an electric power steering device includes a steering mechanism converting an input torque into a steering force and transmitting the steering force to wheels, a torque sensor outputting a torque detection signal according to an input torque, an electric motor applying a steering assist torque according to a torque detection signal output from the sensor, a sensor circuit changing output characteristics of the sensor, an actuator applying an input torque to the steering mechanism, a steering force meter actuating the motor via the sensor according to an input torque and measuring a steering force output by the steering mechanism, and a sensor output adjuster adjusting the output characteristic of the sensor circuit to approximate a steering force measured by the meter to an ideal value set in advance according to a deviation amount calculated based on a difference between the steering force and the ideal value. | 04-11-2013 |
20130068575 | JOINT STRUCTURE AND HYDRAULIC SHOCK ABSORBER - In a joint structure for joining an insertion shaft that is driven to rotate to a reception side shaft having an insertion groove into which the insertion shaft is inserted so that a rotation of the insertion shaft is transmitted to the reception side shaft, a plurality of pairs of opposing side face portions are formed on an outer periphery of the insertion shaft, the insertion groove includes an axial hole that is formed to open onto an end surface of the reception side shaft and coincides with a pair of first side face portions of the side face portions, and a radial hole that is formed to penetrate the reception side shaft in a radial direction and coincides with a pair of second side face portions of the side face portions, and the axial hole and the radial hole are formed such that respective parts thereof intersect. | 03-21-2013 |
20130048889 | CONTROL VALVE - A control valve includes a signal pressure passage that transmits a pilot pressure in first and second pilot chambers as a signal pressure of another device, and first and second connecting grooves that connect the first and second pilot chambers to the signal pressure passage when a spool is in a neutral position. When the pilot pressure is led into the first pilot chamber such that the spool moves, the first connecting groove connects the first pilot chamber to the signal pressure passage while the second connecting groove separates from the signal pressure passage. When the pilot pressure is led into the second pilot chamber such that the spool moves, the second connecting groove connects the second pilot chamber to the signal pressure passage while the first connecting groove separates from the signal pressure passage. | 02-28-2013 |
20130037131 | CONTROL VALVE - A control valve includes a signal pressure passage that transmits a pilot pressure of first and second pilot chambers as a signal pressure of another device, a connecting groove that is formed in a spool and connects the first pilot chamber to the signal pressure passage when the spool is in a neutral position, a connecting hole that is formed in the spool and connects the second pilot chamber to the signal pressure passage, and a check valve that is interposed in the connecting hole and permits a flow only from the second pilot chamber to the signal pressure passage. The connecting groove connects the first pilot chamber to the signal pressure passage when the pilot pressure is led into the first pilot chamber, and blocks communication between the first pilot chamber and the signal pressure passage when the pilot pressure is led into the second pilot chamber. | 02-14-2013 |
20130035820 | HYBRID CONSTRUCTION MACHINE - A hybrid construction machine includes a distribution ratio setting unit that reduces an output distribution ratio of a motor generator by controlling an output control mechanism for controlling the output distribution ratio of the motor generator relative to an engine and increases an output distribution ratio of the engine by an amount corresponding to a reduction in the output distribution ratio of the motor generator when a temperature of a battery is lower than a threshold value in a low-temperature region or higher than a threshold value in a high-temperature region, and a regeneration amount control unit that reduces a hydraulic regeneration amount for the hydraulic motor by controlling an input control mechanism for controlling the hydraulic regeneration amount for the hydraulic motor when the temperature of the battery is lower than the threshold value in the low-temperature region or higher than the threshold value in the high-temperature region. | 02-07-2013 |
20130021867 | CONCRETE MIXER TRUCK - A concrete mixer truck includes: a driving device that drives a mixer drum to rotate; a pressure sensor that detects a pressure of the working fluid in the driving device; a material introduction determination unit that determines whether or not a material for generating the mixed concrete has been introduced into the mixer drum; a pressure determination unit that determines whether or not the pressure of the working fluid detected by the pressure sensor has fallen to a set pressure set in advance in accordance with a carrying amount and a fluidity of the mixed concrete after the introduction of the materials for the mixed concrete into the mixer drum; and a notification device that notifies an operator that the pressure of the working fluid in the driving device has fallen to the set pressure on the basis of the determination made by the pressure determination unit. | 01-24-2013 |
20120325603 | DAMPING VALVE - A damping valve comprises a through-hole forming a passage for a working fluid. A poppet having a center axis is seated on a valve seat around the through-hole. The poppet is housed in a housing so as to be free to slide along the center axis. The poppet is pressed against one wall surface of the housing by a biasing mechanism, that biases the poppet in a direction perpendicular to the center axis, vibration of the poppet is thereby suppressed. | 12-27-2012 |
20120312007 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A control system for construction machine includes a pair of first and second main pumps which are variable-displacement pumps, first and second circuit systems connected to the first and second main pumps and including a plurality of control valves, main switching valves provided between the first and second circuit systems and the first and second main pumps, a hydraulic motor for power generation connected to the first and second main pumps via the main switching valves, a generator coupled to the hydraulic motor for power generation, and a battery for storing power generated by the generator. When at least the main switching valve connected to one circuit system is at a position to cause one main pump connected thereto to communicate with the hydraulic motor for power generation, the main switching valve connected to the other circuit system causes the other main pump to communicate with the other circuit system. | 12-13-2012 |
20120304855 | FLUID PRESSURE CYLINDER - A piston of a fluid pressure cylinder comprises a sealing ring interposed in a sealing ring accommodation groove, a piston ring that is interposed in a piston ring accommodation groove of the piston and comprises a fractured portion, and a backup ring that is attached to an outer peripheral surface of the piston and contacts the sealing ring and the piston ring. A groove for holding the backup ring is not required, and therefore a diameter of the piston can be reduced relative to the sealing ring. As a result, attachment of the sealing ring to the piston is simplified. | 12-06-2012 |
20120304630 | CONTROL SYSTEM FOR CONSTRUCTION MACHINE - A control system for construction machine includes a main pump; a circuit system including operation valves; a boom cylinder being connected to a specific operation valve; one passage allowing communication between the specific operation valve and a piston-side chamber; another passage allowing communication between the specific operation valve and a rod-side chamber; a hydraulic motor rotating by the action of return oil from the piston-side chamber; a generator generating power by a rotational force of the hydraulic motor; a battery storing power generated by the generator; and a valve mechanism being provided in the one passage communicating with the piston-side chamber, introducing the return oil from the piston-side chamber at the time of descent as a regeneration flow to the hydraulic motor and introducing the return oil as a recovery flow to the rod-side chamber if necessary by causing the return oil to flow into the other passage. | 12-06-2012 |
20120269656 | OPPOSING SWASH PLATE PISTON PUMP/MOTOR - A first swash plate ( | 10-25-2012 |
20120255822 | ADJUSTER AND SHOCK ABSORBER - A rotary member that displaces a valve member in an axial direction in accordance with a rotation operation is supported on an adjuster case coaxially with the valve member. A detent mechanism is constituted by a fluid chamber that applies a fluid pressure to the rotary member in a direction for separating from the valve member, a pressure-applying member fixed to the rotary member, and a pressure-receiving member that is fixed to the adjuster to support the pressure-applying member against a pressure of the fluid chamber. By forming an engagement portion that engages with the pressure-applying member in the pressure-receiving member, a dimension of the rotary member of the adjuster and an operation input can be suppressed to be small. | 10-11-2012 |
20120252590 | ROTARY DAMPER - In a rotary damper including a shaft, a pair of side panels which pivotally support the shaft while allowing the shaft to rotate in the circumferential direction, a case which is held between the side panels and forms a pressure chamber therein, a vane which is provided in the shaft, has a distal end in sliding contact with the inner periphery of the case and divides the pressure chamber into a first chamber and a second chamber, and a side plate which is interposed between the vane and at least one of the side panels and are more excellent in abrasion resistance than the side panels. | 10-04-2012 |
20120245806 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A controller determines whether or not the storage amount of a battery is below a threshold, and reduces an assist output of a sub-pump by controlling an assist control mechanism based on an assist correction coefficient, increases the discharge amount of a main pump by controlling an engine controller based on an engine rotation speed correction coefficient and increasing the rotation speed of an engine, and increases an output of the main pump by increasing the rotation speed of the engine by as much as a reduction in the assist output of the sub-pump. | 09-27-2012 |
20120245782 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A controller is connected to a pressure sensor. The controller controls a regulator of a sub-pump in accordance with a pressure signal from the pressure sensor, detects an output of a main pump, and controls an output of an electric motor according to the output of the main pump based on a table stored beforehand. | 09-27-2012 |
20120241245 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus for assisting steering of a steered wheel. The electric power steering apparatus includes an electric motor with a built-in controller for controlling rotation, a transmission mechanism for transmitting the rotation of the electric motor to the steering shaft, a connector used to pull out wiring from the controller to the outside, a first casing in which the connector and the electric motor are to be mounted and which includes an work hole used for a wire connection operation of the controller and the connector, a lid member for closing the work hole, and a second casing to be fixed to the first casing while housing the transmission mechanism. The second casing including a cover part for covering the lid member in a state fixed to the first casing. | 09-27-2012 |
20120234639 | DAMPING DEVICE - A damping device comprises a piston that partitions an interior of a cylinder into first and second working chambers. A flow-rate-dependent damping force generating element connects the first and second working chambers. A first pressure chamber and a second pressure chamber divided by a free piston are formed integrally with the piston. A first connecting passage connects the first working chamber and the first pressure chamber, and a second connecting passage connects the second working chamber and the second pressure chamber. By providing a relief valve that allows fluid to flow from the first working chamber into the second working chamber, an increase in the generated damping force during a high speed operation of the piston can be suppressed, regardless of a vibration frequency of the piston. | 09-20-2012 |
20120233998 | CONTROL SYSTEM FOR HYBRID CONSTRUCTION MACHINE - A regeneration switching valve which communicates with a neutral flow path and a tank at a normal position and cuts off communication between the neutral flow path and the tank to cause the neutral flow path to communicate with a hydraulic motor for power generation at a switched position is provided in at least one of first and second circuit systems including a plurality of control valves. | 09-20-2012 |
20120233995 | HYBRID OPERATING MACHINE - A controller determines whether or not a control valve for controlling the supply of pressure fluid from a main pump to an actuator is at a neutral position, detects input power of a hydraulic motor rotated by return oil from the actuator, and narrows the opening of a proportional electromagnetic throttle valve when the control valve is at the neutral position and the input power of the hydraulic motor is in excess of a first threshold value. | 09-20-2012 |
20120228948 | CHARGING APPARATUS FOR CONSTRUCTION MACHINE - A charging apparatus includes a diode, a switch, a high-voltage conversion circuit, and a controller which determines whether a charge capacity of a low-voltage battery is above a threshold and outputs a signal for supplying power of a generator to the low-voltage battery when the charge capacity is equal to or below the threshold while outputs a signal for charging the high-voltage battery when the charge capacity is above the threshold value. | 09-13-2012 |
20120228071 | LEAF VALVE STRUCTURE - A leaf valve structure according to this invention comprises an annular valve seat, and a leaf that is seated on the valve seat under a predetermined elastic supporting force against a pressure of a working fluid on an inner side of the valve seat. A recessed depression portion having an opening portion on both an inner periphery of the valve seat and a seating surface of the leaf is formed in the valve seat, thereby creating a site where the pressure of the working fluid on the inner side of the valve seat can act more easily on a seating surface between the valve seat and the leaf valve. Accordingly, an effect of a surface adsorption force applied to the leaf valve by the valve seat on a cracking pressure can be suppressed, and as a result, the leaf valve can be lifted under a stable cracking pressure. | 09-13-2012 |
20120204666 | WORM REDUCTION GEAR - A worm reduction gear that reduces a rotation of a worm and transmits the reduced rotation to a worm wheel includes a casing that houses the worm and the worm wheel, wherein the casing includes: a wheel opposing surface that opposes an end surface of the worm wheel via an interval; and a grease holding recessed portion formed in a recessed shape in the wheel opposing surface, and the grease holding recessed portion is provided in a position opposing a worm meshing portion between the worm and the worm wheel. | 08-16-2012 |
20120181767 | SUSPENSION DEVICE - A suspension device (S) of the present invention includes: a member ( | 07-19-2012 |
20120160899 | PISTON ROD MANUFACTURING METHOD - A piston rod manufacturing method for manufacturing a piston rod by joining together respective end surfaces of a rod main body and a rod head, includes a first step of hollowing out respective axial center portions of the rod main body and the rod head from the respective end surfaces thereof in order to remove impurities caused by center segregation, and a second step of joining together the respective end surfaces of the rod main body and the rod head by friction welding. | 06-28-2012 |
20120152053 | PEDAL DEVICE - A pedal device is provided with an accelerator pedal pivotally mounted in a vehicle; and a damper disposed between the accelerator pedal and the vehicle. The depressing force as a depression degree of the accelerator pedal is deter mined by the damper according to the movement of the accelerator pedal. Thus, the pedal device does not use friction members which create abrasion and the function thereof is not impaired even if exchange and maintenance are not carried out over a long period of time. Therefore, maintenance frequency and cost of the pedal device can be reduced. | 06-21-2012 |
20120116634 | SUSPENSION SYSTEM FOR VEHICLE - A suspension system is provided to execute a control for avoiding a state in which an operation of an electric motor which is a power source of an electromagnetic actuator is kept halted at a certain operational position while the motor is generating a motor force. Where a target rotational position of the motor becomes equal to a specific operational position (e.g., a rotational position at which an electrifying current amount of one phase reaches a peak value), a control for shifting the target rotational position by δθ is executed. Where the rotational position of the motor is kept located at the certain position for a time period longer than a prescribed time, a control for changing the rotational position of the motor is executed. | 05-10-2012 |
20120067444 | LEVELING VALVE - A contracted portion having an axial length is formed in the spool hole and a large diameter portion having an axial length is formed in the spool within the spool such that an annular gap is formed there-between. A valve body closes an opening portion of the spool hole. When the valve body is lifted, one of an air pressure source and a drain is connected to an air spring passage via the annular gap. When the spool retreats from the valve body, the other of the air pressure source and the drain is connected to the air spring passage via the annular gap. By setting the lengths at different values, different flow rate characteristics are realized when supplying compressed air to an air spring and discharging air from the air spring. | 03-22-2012 |