THK CO., LTD. Patent applications |
Patent application number | Title | Published |
20160126821 | LINEAR ACTUATOR - Provided is a linear actuator whose entire length can be shortened while thrust thereof can be made large. The linear actuator of the present invention is provided with the following: a hollow drive magnet ( | 05-05-2016 |
20160116033 | ACTUATOR - To provide an actuator with which side face covers can be easily attached and detached without damaging a top face cover, and workability is enhanced, and cost can be reduced without upsizing the actuator, by fastening and fixing the actuator to a base stand from above the actuator in a state in which the side face covers are removed. | 04-28-2016 |
20160097421 | BALL JOINT - Provided is a ball joint capable of coupling a third mechanical element in a freely pivotable manner near a pivot center of a first mechanical element and a second mechanical element coupled to each other in a freely pivotable manner. The ball joint includes: a ball stud including: a shaft member configured to allow a first mechanical element to be coupled thereto; and a ball portion formed at a distal end of the shaft member; a holder including a fixing port ion configured to allow a second mechanical element to be coupled thereto, the holder being formed through casting with the ball portion being set as a core to cover a maximum diameter portion of the ball portion, the holder being configured to couple the first mechanical element and the second mechanical element in a freely pivotable manner with the ball portion defining a pivot center; and a pivot shaft that protrudes out of the holder in a direction of intersecting with the shaft member of the ball stud to define a second pivot center independently of the ball portion, and to serve as a coupling portion for a third mechanical element, the pivot shaft being integrated with the holder at the time of the casting of the holder. | 04-07-2016 |
20160094169 | STEPPING-MOTOR CONTROL DEVICE AND CONTROL METHOD - A control device is a control device ( | 03-31-2016 |
20160091066 | SCREW DEVICE - Provided is a screw device in which a sudden change in force on or a sudden change in the positions of the rolling members can be suppressed at the boundary between a helical loaded rolling-member rolling path and a return path of the screw device. | 03-31-2016 |
20160084676 | LINEAR ENCODER DEVICE AND REFERENCE POSITION DETECTION METHOD - A linear encoder device ( | 03-24-2016 |
20160084312 | DOUBLE-ROW ROLLER BEARING - Provided is a double-row roller bearing, which is capable of suppressing a frictional force from being increased due to variation in force of press contact between outer and inner rings and rollers to enable smoother relative rotational movement between the outer ring and the inner ring, and is also suitable for downsizing and higher in versatility. The double-row roller bearing includes: the inner ring; the outer ring; and the plurality of rollers arranged between the inner ring and the outer ring. On an inner peripheral surface of the outer ring, a pair of lateral protruding portions continuous along a circumferential direction are formed at an interval in a direction of a rotation axis. On an outer peripheral surface of the inner ring, an intermediate protruding portion continuous along the circumferential direction is formed so as to be positioned between the lateral protruding portions. The pair of lateral protruding portions and the intermediate protruding portion define a pair of roller rolling passages between the outer ring and the inner ring. In each of the pair of roller rolling passages, rollers each having a turning axis perpendicular to the rotation axis of the outer ring and the inner ring, and rollers ( | 03-24-2016 |
20160082600 | HAND - A hand is provided which is capable of increasing not only the operation stroke of a pair of gripping members but also gripping force of the pair of gripping members. | 03-24-2016 |
20160003295 | SUPPORT AND GUIDE DEVICE - A support and guide device capable of smoothly shifting a moving block configured to move along a guide track from one of a plurality of track rails forming the guide track to another of the plurality of track rails even when clearances are secured at joints between the plurality of track rails. Each of the track rails has auxiliary sliding surfaces formed on both end portions of the each of the plurality of track rails in the longitudinal direction, the auxiliary sliding surfaces formed side by side with a guide surface and being inclined with respect to the guide surface. The moving block includes leading sliding portions each configured to face one of the auxiliary sliding surfaces of the track rail when the moving block reaches one of both end portions of the track rail in the longitudinal direction. | 01-07-2016 |
20150369282 | MOTION GUIDE DEVICE - The linear guide | 12-24-2015 |
20150369280 | MOVEMENT-GUIDING DEVICE - This movement-guiding device | 12-24-2015 |
20150362014 | MOTION GUIDE DEVICE - Provided is a motion guide device in which a moving member is equipped with circulation path moldings. With the device, ease of assembly and moldability can be improved. A moving member is provided with circulation path moldings, which have: holding sections that extend along loaded rolling-element rolling sections; return path configuring sections that configure return paths; and a pair of direction-change path inner circumference configuring sections that configure the inner circumferences of a pair of direction-change paths. The circulation path moldings are provided with a first molding in which one direction-change path inner circumference configuring sections is integrally molded with the holding section and a second molding in which the other direction-change path inner circumference configuring section is integrally molded with the return path configuring section. The first molding and the second molding are separate bodies. | 12-17-2015 |
20150337899 | MOTION-GUIDING DEVICE - Provided is a motion guide device capable of preventing interference of belt members with guide grooves to smoothly circulate the belt members through a direction-changing path, thereby being capable of smoothly circulating rolling elements through an endless circulation path. The motion guide device includes the rolling elements, a track rail on which the rolling elements are caused to roll, a moving block having formed therein the endless circulation path for the rolling elements, and a coupling member received in the endless circulation path. The endless circulation path includes a load rolling element path, a rolling element return path, and the direction-changing path. The guide groove for the coupling member, which is formed in the direction-changing path, has an outer circumferential guide surface and an inner circumferential guide surface, each of which is formed into a smoothly continuous shape. A groove width of the guide groove is set to a maximum value at a midpoint of a path within a range of from a coupling end between the direction-changing path and the load rolling element path or the rolling element return path to a center portion of the direction-changing path, and the groove width at the coupling end and the groove width at the center portion are set smaller than the maximum value of the groove width at the midpoint of the path. | 11-26-2015 |
20150321582 | SEAT SLIDE DEVICE FOR VEHICLE - Provided is a seat slide device for a vehicle capable of enhancing the degree of design freedom in an interior height of a vehicle cabin, light-weighting the vehicle, and enhancing comfort in use when a seat is moved forward and rearward. The seat slide device for a vehicle includes: an upper rail made of an aluminum alloy, including a sliding section having a plurality of ball rolling grooves each formed along a longitudinal direction of the upper rail; a lower rail made of an aluminum alloy, including: a guide groove for receiving the sliding section of the upper rail; and ball rolling grooves each formed in the guide groove along a longitudinal direction of the lower rail to be opposed to the plurality of ball rolling grooves of the sliding section; and a large number of guide balls each made of a synthetic resin, for supporting movement of the upper rail relative to the lower rail, the large number of guide balls being arrayed in line without using a cage in a portion between each of the plurality of ball rolling grooves and each of the ball rolling grooves. | 11-12-2015 |
20150176643 | GUIDING BODY AND MOTION-GUIDING DEVICE PROVIDED WITH SAME - A guide body can be prevented from being disengaged from a track rail even where the track rail is made of a low-rigidity material, thereby securing reliable movement along the track rail. The guide body includes: a large number of rolling elements that roll on a rolling surface formed along a structure, the guide body being movable relative to the structure; an endless circulation path through which the large number of rolling elements circulate; a load opening portion for allowing the large number of rolling elements in the endless circulation path to be held in contact with the rolling surface of the structure; and a guide portion formed on at least one side of the load opening portion so as to project toward the structure side with respect to projecting ends of the large number of rolling elements projecting from the load opening portion toward the structure side. | 06-25-2015 |
20150122963 | MOVEMENT UNIT - Provided is a moving unit that enables a movable body to be smoothly moved along guide tracks for guiding the movable body across joints between a plurality of track rails arranged in series so as to serve as the guide tracks. The moving unit includes: the pair of guide tracks laid in parallel to each other; a plurality of moving blocks being two or more moving blocks assembled to each of the guide tracks and being freely movable along the guide tracks; and the movable body fixed to the moving blocks. The track rails arranged in series serve as the guide tracks, and each have a guide surface formed along a longitudinal direction of each of the track rails. The moving blocks each include contact elements configured to travel on the guide surface while passing across joint clearances each being formed between the track rails arranged in series. | 05-07-2015 |
20150122559 | LOWER LIMB STRUCTURE FOR LEGGED ROBOT, AND LEGGED ROBOT - Provided is a lower limb structure for a legged robot with which a load on an actuator for driving a knee joint can be reduced. The lower limb structure for the legged robot comprises: a hip joint main body; a thigh portion; a hip joint coupling for connecting the thigh portion to the hip joint main body; and a knee joint main body joined to the thigh portion. The lower limb structure for the legged robot provides a thigh portion auxiliary link having one end portion joined to the hip joint main body or the hip joint coupling to be rotatable about a pitch axis and the other end portion joined to the knee joint main body to be rotatable about the pitch axis. A knee joint actuator increases and decreases a length from the one end portion to the other end portion of the thigh portion auxiliary link. | 05-07-2015 |
20150104122 | MOTION DEVICE - A motion device ( | 04-16-2015 |
20150098797 | ROTARY SHAFT DEVICE AND VERTICAL SHAFT FLUID POWER GENERATOR - A rotary shaft device ( | 04-09-2015 |
20150093055 | MOTION GUIDE DEVICE - A motion guide device includes a plurality of rolling element guide members provided along the entire length of a rolling element rolling surface so as to guide the unloaded side of a plurality of rolling elements that perform a rolling movement under load between the rolling element rolling surface and a loaded rolling element rolling surface. The rolling element guide member includes a beam member an outer member including a rolling element guide surface for guiding the unloaded side of the rolling elements, and the beam member and the outer member are insert-molded. Such a structure provides the motion guide device including the rolling element guide member that enables low cost manufacturing of a complex shape and capability of secure installation and guidance of the rolling elements with no deflection and can be adapted for use in various types by optionally selecting a connecting means. | 04-02-2015 |
20150043843 | ROLLING GUIDANCE DEVICE - A rolling guide device is capable of preventing a scooping piece formed on a circulation path module from being deformed along with use over time, and enhancing the durability of the scooping piece, thereby achieving smooth motion of a moving member relative to a track member. A moving member includes: a main body member having load rolling surfaces and return paths for rolling elements; direction change pipes having formed therein inner direction change paths and having inner peripheral guide surfaces of outer direction change paths, respectively; and lid members each being mounted on the main body member and having outer peripheral guide surfaces of the outer direction change paths. Each of the direction change pipes includes: a first half circulation segment and a second half circulation segment; and a scooping portion for guiding the rolling elements into each of the inner direction change paths. | 02-12-2015 |
20150036953 | MOTION DEVICE - A motion device includes a track rail, a moving body, rolling elements, fixing members each fixed to an end surface of the moving body, and rolling element circulation members arranged between the moving body and the fixing members. The rolling element circulation members each have a connection section connected to the moving body so as to be rotatable about a Y direction, and a pair of first outside surfaces. The fixing members each have accommodation sections to accommodate the rolling element circulation members, and a pair of first inside surfaces closely contact with the pair of first outside surfaces. The respective rolling element circulation members and the accommodation sections are provided at both sides of the track rail interposed there between. | 02-05-2015 |
20150016759 | ROLLING GUIDE DEVICE - A rolling guide device is capable of facilitating smooth circulation of rolling elements in an endless circulation path, and enhancing the accuracy of motion of a moving member relative to a track member. The moving member includes: a main body member having load rolling surfaces and return paths for the rolling elements; direction change pipes incorporating inner direction change paths and having inner peripheral guide surfaces of outer direction change paths, respectively; and lid members each being mounted on the main body member and having outer peripheral guide surfaces of the outer direction change paths. The main body member has position reference holes formed therein so as to serve as position references for the direction change pipes, respectively, whereas the direction change pipes have positioning protrusions formed thereon so as to be press-fitted into the position reference holes, respectively. Further, the direction change pipes include rotation restriction protruding portions. | 01-15-2015 |
20140363110 | MOTION GUIDE APPARATUS - To provide a motion guide apparatus which is capable of precisely positioning a moving member and rolling elements without using positioning devices, such as walls and flanges, of the rolling elements, and which thereby enables smooth rolling of the rolling elements and reduction of manufacturing cost, and also enables the rolling elements to surely exhibit the self-adjusting capability of the moving member. In the motion guide apparatus, the cross-sectional shape of each of the rolling-element rolling surface and the load rolling-element rolling surface is formed into a circular arc shape projecting in the direction that the rolling-element rolling surface and the load rolling-element rolling surface face each other, the rolling element is formed to have a drum shape with a diameter gradually reduced from both ends of the rolling element along the shaft direction of the rolling element so as to correspond to the cross-sectional shape of the rolling-element rolling surface and the load rolling-element rolling surface, and the rolling-element rolling surface and the load rolling-element rolling surface configure an angular contact structure. | 12-11-2014 |
20140333236 | LINEAR MOTOR DEVICE AND METHOD FOR CONTROLLING LINEAR MOTOR DEVICE - A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, the control unit controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, and the control unit causes the movable part to move until the current flowing through the linear motor is greater than or equal to a predetermined current limit value. | 11-13-2014 |
20140331806 | PARALLEL LINK ROBOT - Provided is a parallel link robot which has increased rigidity and which can be reduced in size. The parallel link robot includes: a base ( | 11-13-2014 |
20140301677 | MOTION GUIDE DEVICE - Provided is a motion guide device capable of suppressing generation of a gap between a first seal member and a second seal member, which are fixed to a moving block, and preventing foreign matters from entering the moving block, to thereby achieve a smooth motion of the moving block with respect to a track rail. The motion guide device includes: a track shaft having a rolling surface; a moving member freely movable along the track shaft; the first seal member that comes into sliding contact with a surface of the track shaft so as to close a gap between the track shaft and the moving member; and the second seal member that is provided along the rolling surface of the track shaft and closes the gap between the track shaft and the moving member. The second seal member includes: a fixing substrate locked to the moving member; and a seal portion that is firmly fixed to the fixing substrate along the rolling surface of the track shaft and includes a seal lip portion that comes into sliding contact with the surface of the track shaft and an extended seal portion that comes into close contact with the first seal member while being compressed by the first seal member under the state in which the first seal member is fixed to the moving member. | 10-09-2014 |
20140254961 | MOTION GUIDE DEVICE - Provided is a motion guide device capable of preventing a lid member from being damaged due to collision of balls and operating a moving block on a track rail at high speed. The motion guide device includes: a track member having a ball rolling surface; a moving member main body having a load ball rolling surface that forms a load ball path between the load ball rolling surface and the ball rolling surface, and a ball return path provided in parallel to the load ball path); a lid member having a direction changing path that connects the load ball path and the ball return path to each other to form an endless circulation path; and balls arranged in the endless circulation path. The lid member includes an introducing portion of the direction changing path, which includes a first contact surface continuous with the direction changing path. | 09-11-2014 |
20140238177 | ARTICULAR STRUCTURE FOR ROBOT AND ROBOT WITH INCORPORATED ARTICULAR STRUCTURE - An articular structure for a robot according includes: a first intermediate link ( | 08-28-2014 |
20140231197 | DAMPING DEVICE - The damping device includes: a fixed cylinder that is configured to be fixed to a first structural body and formed into a cylindrical shape so as to comprise a hollow portion; a shaft member that is configured to be fixed to a second structural body, the shaft member being housed in the hollow portion of the fixed cylinder and having an outer peripheral surface provided with a helical thread groove; a nut member that is threadedly engaged with the shaft member, and converts an axial motion of the shaft member into a rotational motion; a rotor member that is formed into a cylindrical shape so as to cover the fixed cylinder and to form a cylindrical accommodation chamber between the rotor member and an outer peripheral surface of the fixed cylinder, and is rotated by the nut member; and viscous fluid that is sealed in the cylindrical accommodation chamber. | 08-21-2014 |
20140210396 | LINEAR MOTOR DEVICE AND CONTROL METHOD - A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed. | 07-31-2014 |
20140159551 | LINEAR AND ROTARY ACTUATOR SYSTEM - A linear and rotary actuator system includes a shaft member moving linearly in an axial direction and rotating around an axis line, a hollow rotor surrounding the shaft member, a stator of a rotary motor having a space for holding the rotor and which rotates the rotor around the axis line, linear bearings, that rotates together with the rotor to transmit rotation of the rotor of the rotary motor to the shaft member and accepts linear movement of the shaft member, an angle measuring unit for measuring a rotation angle of the rotor, and a rotary motor driver for controlling the rotary motor in such a manner that the rotation angle of the rotor of the rotary motor measured by the angle measuring unit conforms to a command value. The rotation angle of the shaft member is controlled by controlling the rotation angle of the rotor of the rotary motor. | 06-12-2014 |
20140152096 | LOAD CONTROL SYSTEM AND LOAD DRIVING SYSTEM - A load control system has a plurality of drivers provided correspondingly to a plurality of load driving elements in order to control driving of the respective load driving elements for driving loads. Each of the plurality of drivers includes a control unit that controls the load driving element directly associated with a subject driver. The respective drivers are electrically connected to one another so that a mutual control communication state, in which the control unit of the subject driver can transmit to the control units of all or a portion of target drivers of other drivers excluding the subject driver a command signal for controlling the driving of a load driving element directly associated with the all or the portion of target drivers, is created in the load control system. | 06-05-2014 |
20140048504 | MOVABLE RACK UNIT - Provided is a movable rack unit for taking in and out a storage object with respect to a storage space. The movable rack unit includes a guide part including a track member linearly laid inside the storage space and along a depth direction of the storage space and a moving body that moves along the track member. A support member is rotatably borne on the moving body, and the support member supports the storage object within the storage space. Further, this unit includes a rotation guiding part, and the rotation guiding part changes the attitude of the support member in accordance with the position of the moving body with respect to the track member. When the moving member reaches an opening portion side of the storage space, the rotation guiding part rotates the support member so that merely the support member is set outside the storage space. | 02-20-2014 |
20140045733 | GREASE COMPOSITION AND MOTION GUIDING DEVICE LUBRICATED BY GREASE COMPOSITION - The grease composition for a clean environment includes, a base oil, a thickener and a extreme-pressure agent, in which a kinetic viscosity of the base oil at 40° C. is 100˜300 mm | 02-13-2014 |
20130323059 | WIND TURBINE GENERATOR - A wind turbine generator includes a plurality of blades that radially protrude from a rotor head about an axis of a main shaft, and a pitch axis rotation mechanism that is provided in the rotor head to rotate the blade about a pitch axis P. The pitch axis rotation mechanism includes an actuator that is supported by the rotor head, and has a stretchable rod which is supported by the rotor head, and a link structure that links the rod to the blade. The actuator extends on the axis of the main shaft. | 12-05-2013 |
20130282192 | MOTOR CONTROL APPARATUS, MOTOR CONTROL METHOD, AND CONTROL PROGRAM - A motor control apparatus is provided, including: a command generation unit that generates an acceleration pattern time-sequentially indicating an acceleration command value to be used during movement of a target object to a target position using a motor, makes a change to the generated acceleration pattern to prolong a period of reducing a driving speed of the motor in accordance with response characteristics of the motor, and outputs a position command value from the changed acceleration pattern; and a control unit that drives the motor using a proportional control with respect to a position deviation between the position command value output from the command generation unit and the target position of the target object, and changes a proportional control gain in the proportional control to a value larger than a current value when the target object reaches the vicinity of the target position. | 10-24-2013 |
20130278099 | ALIGNMENT STAGE - An alignment stage including: a base plate; one or more X direction thrust generation guide mechanisms for generating thrust and performing guidance in the direction of a straight line X; a pair of lower plates disposed above the X direction thrust generation guide mechanisms; a pair of upper plates provided corresponding to the lower plates, respectively; a pair of rotatable bearings disposed between the lower plates and the upper plates; one or more Y direction thrust generation guide mechanisms for generating thrust and performing guidance in the direction of a straight line Y perpendicular to the straight line X; and a table plate disposed above the Y direction thrust generation guide mechanisms. With this configuration, it is possible for the alignment stage to be compact and easy to assemble. | 10-24-2013 |
20130255419 | SEAL MEMBER AND LINEAR MOTION GUIDE DEVICE USING SAME - A ball screw device or linear motion guide device has a seal member preventing dust and dirt from entering into a movable member of a linear motion guide device and seals out fine dust, dirt or like by surely contacting a seal to a shaft member without providing a large margin to the seal. The seal member includes a body portion mounted to the movable member and a lip portion contacting an outer portion of the shaft member, the lip portion has an oblique surface having an axial section inclining with respect to its axial direction, the body portion has an urging member urging the lip portion in a diameter direction of the shaft member and a reinforcing portion reinforcing the body portion. The urging member is located on the reinforcing portion side than the tip end of the lip portion in the axial sectional shape of the lip portion. | 10-03-2013 |
20130247700 | ELECTRIC ACTUATOR WITH SHOCK ABSORBING MECHANISM - An electric actuator is capable of easily achieving reduction in weight and size when compared to a hydraulic cylinder device, capable of being used in place of the hydraulic cylinder device, and capable of freely extending in response to a suddenly-applied impact load. An electric actuator converts rotation of an electric motor into advancing/retracting motion of an output rod using a screw shaft and a nut member mounted to the screw shaft. The output rod includes: a drive cylinder, to which the nut member is provided, the drive cylinder being arranged around the screw shaft; and a movable cylinder arranged to overlap the drive cylinder around the screw shaft and freely advancing and retreating with respect to the drive cylinder. The electric actuator further includes a releasing mechanism provided between the drive cylinder and the movable cylinder, for engaging the movable cylinder with the drive cylinder. | 09-26-2013 |
20130243517 | SCREW MOTION MECHANISM AND DAMPING APPARATUS USING SAME - The screw motion mechanism includes: a threaded shaft having an outer peripheral surface provided with a helical thread groove, the threaded shaft having at least one axial end coupled to a first structural body; a nut member held in a rotatable manner with respect to a second structural body which is movable in an axial direction of the threaded shaft with respect to the first structural body, the nut member being threadedly engaged with the threaded shaft; and a spherical joint for coupling the at least one axial end of the threaded shaft to the first structural body, the spherical joint including: a spherical portion; and a sphere receiving portion for housing the spherical portion. When assuming an axial force applied to the threaded shaft as a variable, a line of a rotational torque intersects with a line of a sliding torque in a graph. | 09-19-2013 |
20130236133 | MOTION GUIDE DEVICE - The motion guide device includes: a raceway rail; a moving block including an endless circulation path for rolling elements; and spacers interposed in the endless circulation path of the moving block. The moving block includes: a block body including: a load rolling element path for the rolling elements; and a rolling element return path parallel to the load rolling element path; and turning path forming members fixed to the block body. The turning path forming member includes a direction turning path for coupling the load rolling element path and the rolling element return path to each other. The direction turning path includes: a turning portion for continuously varying a rolling direction of the rolling elements; and a preliminary turning portion which allows the spacers to move in a curved form while linearly guiding the rolling elements. | 09-12-2013 |
20130187573 | CONTROL APPARATUS FOR LINEAR MOTOR, AND LINEAR MOTOR APPARATUS - A control apparatus ( | 07-25-2013 |
20130147286 | LINEAR ACTUATOR PROVIDED WITH DUST-PROOF MECHANISM - There is provided a linear actuator provided with a dust-proof mechanism capable of preventing dust-proof belts from being deformed, improving a sealing performance between the dust-proof belts and a housing member, and achieving high dust-proof performance irrespective of a size of the linear actuator. The linear actuator provided with the dust-proof mechanism includes: a housing member disposed so as to cover at least a ball screw; an opening portion formed in the housing member so as to extend along a moving locus of a movable stage; and dust-proof belts stretched inside the housing member so as to close the opening portion by being mounted to mounting members disposed both end portions of the housing member, wherein a bypass member for bypassing the dust-proof belts positioned at position overlapped with the movable stage is provided for the movable stage so as to realize movement of the movable member along the opening portion while closing and sealing the opening portion by the dust-proof belts, and in such a linear actuator provided with the dust-proof mechanism, the dust-proof belts are wound up around the mounting member and sandwiched between the mounting member and the end portions of the housing member. | 06-13-2013 |
20130139629 | ROLLING ELEMENT SCREW ASSEMBLY - The rolling element screw device includes: a screw shaft having a rolling element raceway groove; a nut member, which has a loaded rolling element raceway groove opposed to the rolling element raceway groove and is threadingly engaged with the screw shaft through intermediation of the rolling elements; and the circulation component, which includes a pair of the first circulating portions passing through a peripheral wall of the nut member, and the second circulating portion coupling the pair of first circulating portions together, to thereby form the endless circulation path for the rolling elements. Each of the first circulating portions includes a first cylindrical portion fitted into a circulation component mounting hole of the nut member, and a second cylindrical portion which has an outer diameter larger than an outer diameter of the first cylindrical portion. The first cylindrical portion includes a rolling element introducing hole. | 06-06-2013 |
20130121625 | MOTION GUIDE DEVICE - The motion guide device includes: a track rail including insertion holes for fixing bolts; and a moving block assembled to the track rail through intermediation of a large number of rolling elements. The moving block includes an adhering matter path provided at a position opposed to the insertion holes of the track rail, the adhering matter path allowing matters adhering on the track rail to pass from one end to another end of the moving block. A pair of path forming members are fixed to both ends of the moving block in a moving direction thereof. The path forming members each include: a pair of end seal portions which traverse rolling-element rolling surfaces of the track rail and abut against a surface of the track rail; and a path opening portion which is provided between the end seal portions and forms an entrance of the adhering matter path. | 05-16-2013 |
20130082544 | LINEAR MOTOR - Provided is a linear motor capable of preventing an increase in length of the armature in the moving direction and also of reducing cogging. The linear motor has a magnetic field part having a plurality of permanent magnets arranged in a straight line in such a manner that N poles and S poles are formed alternately; and an armature having a core which has a plurality of teeth arranged opposite to the magnetic field part with a gap created therebetween and a plurality of coils wound on the teeth of the core. Among the teeth with the coils wound around, a width TW | 04-04-2013 |
20120328221 | MOTION GUIDE DEVICE AND METHOD OF MANUFACTURING SAME - A motion guide device has a moving block mounting surface | 12-27-2012 |
20120261920 | ROTARY MOTOR ACTUATOR AND HORIZONTAL AXIS WIND TURBINE - Provided is a rotary motor actuator capable of simplifying the manufacture and assembly process. | 10-18-2012 |
20120200178 | LINEAR MOTOR ACTUATOR - Provided is a linear motor actuator capable of eliminating an influence to be exerted onto linear guides ( | 08-09-2012 |
20120187873 | LINEAR MOTOR DRIVING SYSTEM AND LINEAR MOTOR CONTROL METHOD - In a linear motor in which a plurality of stators are arranged in a distributed manner, a position of the movable member is controlled while preventing unnecessary speed variation of the movable member while performing smooth driving. A driving device calculates a deviation between a position command from a controller and a position detected by a position sensor of a corresponding stator, a position controlling is performed calculating speed command to be utilized for speed controlling of the movable member based on the deviation and a position gain, a deviation is calculated at a time when the movable member enters a control area in which at least a part of the magnet portion opposes to the coil of the stator within an area of which position is detected by the position sensor of the corresponding stator, and the position of the movable member is back-calculated from deviation from the position command and the position command, and the position detected by the position sensor is corrected with the calculated position being as the position of the movable member at a time when the movable member enters the control area. | 07-26-2012 |
20120139455 | DISTRIBUTED-ARRANGEMENT LINEAR MOTOR AND CONTROL METHOD OF DISTRIBUTED-ARRANGEMENT LINEAR MOTOR - A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motor | 06-07-2012 |
20120097825 | BASE ISOLATION TABLE WITH DAMPING MECHANISM AND BASE ISOLATION TABLE UNIT USING THE SAME - Provided are a vibration isolating table ( | 04-26-2012 |
20120073396 | MOTION GUIDE DEVICE AND SCREW DEVICE - Provided are a motion guide device and a screw device each having a cover for protecting the device against moisture, such as coolant, and powder dust. The motion guide device has a raceway member | 03-29-2012 |
20120025635 | LINEAR MOTOR ACTUATOR - Provided is a linear motor actuator capable of oscillating a mover without using mechanical resilience of an elastic body. A first permanent magnet | 02-02-2012 |
20120024093 | BALL-SCREW SPLINE - Provided is a ball-screw spline which contributes to downsizing through reduction of an entire length of a spline shaft, while securing a sufficient stroke amount of a spline nut with respect to the entire length of the spline shaft. The ball-screw spline includes: a screw shaft; a ball-screw nut threadedly engaged with the screw shaft through intermediation of balls; and a spline nut assembled to an outside of the ball-screw nut through intermediation of balls to freely reciprocate in an axial direction of the ball-screw nut, in which the ball-screw nut includes a screw portion and an extended portion which are formed integrally with each other with the same outer diameter, in which the screw portion has an inner peripheral surface provided with: a load-rolling groove which forms a load path for the balls together with a ball rolling groove on the screw shaft side; and a ball return path coupling adjacent valley portions of the load-rolling groove so as to form an infinite circulation path corresponding to one loop around the screw shaft, and in which the ball-screw nut has an outer peripheral surface provided with a ball rolling groove for the spline nut, the ball rolling groove for the spline nut being formed over a range corresponding to the screw portion and the extended portion. | 02-02-2012 |
20120017713 | ROLLING ELEMENT SCREW DEVICE - Provided is a rolling-element screw device which does not sacrifice a stroke distance of a nut member ( | 01-26-2012 |
20110301540 | SYRINGE DRIVE UNIT - Provided is a syringe drive unit ( | 12-08-2011 |
20110181129 | LINEAR AND ROTARY ACTUATOR - Provided is a linear and rotary actuator capable of bearing moment and load from a movable body and downsizing its radial dimension. A spline shaft is held in housings to be movable linearly in the axial direction and rotatable about the axis. The spline shaft is connected to a mover shaft of a linear motor. The spline shaft is surrounded with a hollow rotor of a rotary motor. The rotor is connected to a spline nut which transmits rotation of the rotor to the spline shaft by rotating together with the rotor and allows linear movement of the spline shaft. The rotor of the rotary motor is rotated by a stator of the rotary motor. The spline nut, the stator of the rotary motor and a stator of the linear motor are arranged in this order from an end of the spline shaft and mover shaft along the axial direction. | 07-28-2011 |
20110156619 | LINEAR SYNCHRONOUS MOTOR CONTROL METHOD AND CONTROL APPARATUS - It makes possible to control a movable element to be smoothly movable by a sensor-less vector control in an equal speed area, without using a position sensor, and possible to perform a stop control and control it in a low speed area. In a case when a moving speed of the armature is faster than a predetermined speed preliminarily determined within a range in which the movable element is moved in synchronous with movement of the magnetic field generated by the armature by a predetermined sensor-less vector control, the current passing through the armature is controlled by the sensor-less vector control, and in a case when the moving speed of the armature is slower than the predetermined speed, in a d-q coordinate in which a d-axis represents a direction of a flux generated by field and a q-axis represents a phase advanced by π/2 with respect to the d-axis, a d-axis armature current and a q-axis armature current are controlled so that a d-axis electric angle is produced, and current passes through the d-axis armature and does not pass through the q-axis armature. | 06-30-2011 |
20110138942 | SEAL PLATE FOR A MOVEMENT GUIDE DEVICE - Provided is a seal plate ( | 06-16-2011 |
20110135226 | LINEAR MOTION GUIDANCE APPARATUS - A linear motion guidance apparatus suppresses a waving phenomenon, and includes a track rail with rolling member rolling grooves along the longitudinal direction, a movable block with loaded rolling member rolling grooves that face the rolling member rolling grooves, and a plurality of balls rollably provided in loaded rolling paths formed of the rolling member rolling grooves and the loaded rolling member rolling grooves. The movable block can make reciprocating motion in the longitudinal direction of the track rail. The linear motion guidance apparatus is configured so that the diameter of each of the balls is 1/10 of the width of the track rail or smaller and the movable block has a block length compliant with ISO. The number L of endless circulation paths is L=4×N (N is a natural number greater than or equal to two), and in particular, the number of paths L is preferably eight. | 06-09-2011 |
20110126648 | SEALED LINEAR ACTUATOR UNIT - A linear actuator unit has a slide plate which is allowed to freely move along the outer rail while causing a cover to retreat. The linear actuator unit includes: an outer rail, which is formed into a cylindrical shape, and includes the slit-opening portion formed along an axial direction thereof; the slide plate ( | 06-02-2011 |
20110110615 | TRACK RAIL AND MOTION GUIDANCE APPARATUS INCLUDING THE TRACK RAIL - Rigidity and precision of a motion guidance apparatus are increased by improving track rail shape. A track rail has at least two rolling member rolling grooves (RMRGs) on the upper surface and at least one RMRG on each side surface, the RMRGs extending in the longitudinal direction. When the RMRGs are taken along a cross-sectional plane perpendicular to the longitudinal direction of the track rail, and two imaginary lines extending vertically downward are drawn from ends of the respective grooves located on the outer sides among upper surface RMRGs, all the side surface RMRG are positioned in the rail but outside the corresponding one of the two imaginary lines, and at least portions of the upper surface and the side surfaces of the track rail, on which the RMRGs are formed, the portions being in the vicinity of the respective RMRGs, are formed with an inclination angle. | 05-12-2011 |
20110072667 | METHOD OF MANUFACTURING A SPHERICAL BEARING - Provided is a method of manufacturing a spherical bearing having an inside member with a metal ball portion and an outside member having a ball support portion enclosing and supporting the ball portion of the inside member and connected to the inside member swingably or rotatably relative to each other, including the steps of performing injection molding in which the ball portion of the inside member is inserted as a core in a mold to mold a resin liner covering the ball portion, molding the outside member covering the resin liner by a casting in which the ball portion and the resin liner are inserted as a core in the mold, and after the completion of the casting, heating the resin liner covering the ball portion through the ball portion of the inside member. | 03-31-2011 |
20110043159 | SERVO MOTOR POSITION CONTROL DEVICE - Provided is a technique to suppress hunting in a range of a minimum resolution of a pulse encoder when a servo motor has reached a target position and stopped, thereby maintaining a stable stop state. A servo motor position control device uses a cascade configuration having a position control loop as a main loop and a velocity and current control loop as a minor loop. A proportion control is performed for a position control while a proportion integration control is performed for a velocity control and a current control. When the servo motor position has reached the target position and stopped (S | 02-24-2011 |
20110041629 | MOTION DEVICE AND MOVING DEVICE - The present invention relates to a motion device and a moving device in which the total size in a direction perpendicular to the longitudinal direction of an orbital element can be reduced to extremely smaller sizes and miniaturization can be accomplished. A motion device | 02-24-2011 |
20110001282 | ROTARY TABLE DEVICE PROVIDED WITH COOLING STRUCTURE AND ROTARY BEARING PROVIDED WITH COOLING STRUCTURE - A rotary table device includes a cooling structure and a rotary bearing provided with a cooling structure. A rotary table device provided with a cooling structure includes a hollow motor as a drive source, a table rotated by the hollow motor, and a rotary bearing supporting rotational motion of the table, in which the rotary bearing includes an outer ring having an inner peripheral surface to which a rolling surface is formed, an inner ring having an outer peripheral surface to which a rolling surface facing the rolling surface of the outer ring is formed, and a number of rolling members in a rolling passage formed by the rolling surface of the outer ring and the rolling surface of the inner ring, and a heat sink is formed to either one of the inner and outer rings. | 01-06-2011 |
20100314006 | STEEL FOR INDUCTION HARDENING WITH EXCELLENT COLD WORKABILITY, ROLLING MEMBER MADE OF THE SAME, AND MOTION GUIDE DEVICE USING ROLLING MEMBER - This steel for induction hardening contains, by percent by mass, C: 0.7 to 0.9%, Si: 0.4 to 1.0%, Mn: 0.5 to 1.25%, P: 0.030% or less, S: 0.030% or less, Cr: 0.4% or less, Al: 0.05% or less, Ti: 0.003% or less, and O: 0.0020% or less, wherein [Mn]≦0.5+0.35/[Si] is met, the steel further contains Fe and unavoidable impurity and the steel has annealing hardness of 93 HRB or less, and wherein an induction hardening layer after induction hardening has residual austenite of 20 to 40% and hardness of 61 HRC or more. This makes it possible to provide steel for induction hardening in which lowering of a fatigue life hardly occurs even though foreign objects incorporates into lubricating oil of a motion guide device and concentration of stress on its dent causes flaking due to lubrication failure to be generated on a steel surface of a device, or even though rolling/sliding contact occurs. | 12-16-2010 |
20100284641 | ROTATION RING - Provided is a slewing ring which has a structure with a large slewing diameter, and is readily produced at low cost. The slewing ring includes: an outer ring ( | 11-11-2010 |
20100282011 | ROLLER SCREW AND METHOD OF CIRCULATING ROLLERS IN ROLLER SCREW - There is provided a roller screw in which a twisted amount of an unloaded return path is reduced. | 11-11-2010 |
20100263467 | ROLLER SCREW - Provided is a roller screw capable of preventing rollers moving from an unloaded return path to a loaded roller rolling path from coming into collision with a scooping portion. The roller screw has: a screw shaft | 10-21-2010 |
20100259209 | MULTI-AXIS DRIVER CONTROL METHOD, MULTI-AXIS DRIVER AND MULTI-AXIS DRIVE CONTROL SYSTEM HAVING THE SAME - Provided is a multi-axis driver control method that enables communications with drive-axis basis controllers of a multi-axis driver with use of a single general-purpose external interface. | 10-14-2010 |
20100242652 | BALL SCREW DEVICE - Provided is a ball screw device having a novel ball circulation structure suitable for a screw shaft with a large lead, optimum for downsizing and weight saving of a nut member, capable of being manufactured at low cost, and capable of exhibiting high reliability even under severe use conditions. In a ball screw device ( | 09-30-2010 |
20100242651 | ROLLING-ELEMENT SCREW DEVICE - Provided is a rolling-element screw device in which a recess can be easily formed in an outer diameter portion of a nut main body for receiving a circulation member. At both ends of a straight passage | 09-30-2010 |
20100236345 | ROLLING BODY SCREW DEVICE - There is provided a new rolling body screw device manufactured with cheap cost without degrading quality in comparison with a conventional device even for a device having any large dimension in an end-cap type rolling body screw device. The rolling body screw device includes the direction changing passages | 09-23-2010 |
20100207464 | LINEAR MOTOR AND LINEAR MOTOR COGGING REDUCTION METHOD - Provided is a linear motor capable of reducing cogging. | 08-19-2010 |
20100206102 | LINEAR ACTUATOR WITH DUSTPROOF MECHANISM - A linear actuator with a dustproof mechanism provides reliable dustproof capability over the entire stroke of the actuator. A linear actuator | 08-19-2010 |
20100194210 | LINEAR ACTUATOR UNIT - Provided is a linear actuator unit capable of suppressing flexure of a magnet rod ( | 08-05-2010 |
20100192711 | ROLLING DEVICE - A rolling device having high silencing effect and requiring no positional alignment working to the seal is provided. The rolling device includes an inner member, an outer member and a number of rolling members disposed between these inner and outer members to thereby allow the outer member to carry out relative rotational motion with respect to the inner member. In such rolling device, an end plate | 08-05-2010 |
20100171459 | LINEAR MOTOR POSITION DETECTION SYSTEM - Provided is a position detection system which is inexpensive and does not need to control the accuracy of mounting a sensor strictly. | 07-08-2010 |
20100164306 | LINEAR MOTOR - A linear motor is provided with a stator, a slider disposed to be movable relatively with respect to the stator with a gap, and a non-magnetic plate mounted to either one of the stator and the slider so as to define the gap between the stator and the slider. | 07-01-2010 |
20100158420 | METHOD OF MANUFACTURING MOTION GUIDE DEVICE AND MOTION GUIDE DEVICE MANUFACTURED BY THE METHOD - There is performed a treatment including a grinding working step of grinding at least a portion of a rolling surface and a sliding surface of a motion guide device using a rolling member by a grinding working using a grinding stone, and a surface treating step of effecting a peening treatment to a friction surface formed by the grinding working to render a defect on the friction surface caused by the grinding working harmless. By manufacturing a motion guide device through such treating steps, a defect such as flaw generated on the friction surface is made harmless, the fatigue strength, sliding performance and lifetime of the device can be improved. Even in a travelling distance test, a travelling distance largely over a calculated lifetime could be achieved. | 06-24-2010 |
20100158419 | SEALING MEMBER FOR ROLLING DEVICE AND ROLLING DEVICE - A sealing member for a rolling device is applied to a rolling device with inner and outer members and a plurality of rolling members between so the rolling members can roll to allow relative rotational or linear movement of the outer member with respect to the inner member. The sealing member includes an inner and outer lip parts that press the inner and outer members, respectively. The outer lip part is less rigid than the inner lip part. The sealing member may have a substantially circular shape and surround the inner member. Alternatively, the sealing member may have a substantially plate-like shape and extend in a direction of relative movement of the outer member with respect to the inner member. The sealing member for a rolling device configured as described above and a rolling device provided with the sealing member can be adequately used even in a hostile environment. | 06-24-2010 |
20100150483 | MOTION GUIDE DEVICE AND METHOD OF PRODUCING THE SAME - Provided is a motion guide device achieving both of high strength and weight reduction and yet having excellent mass-productivity. | 06-17-2010 |
20100127578 | X-Y TABLE ACTUATOR - Provided is an X-Y table actuator, which is capable of moving and positioning a movable table ( | 05-27-2010 |
20100102496 | ROTARY BEARING, ROTARY TABLE DEVICE AND TABLE DIAMETER DETERMINING METHOD - A rotary table device includes a hollow motor drive source, a table rotated thereby, and a rotary bearing supporting the table. The rotary bearing is provided an outer race having an inner surface to which a rolling surface is formed, an inner race having an outer peripheral surface to which a rolling surface opposing to the rolling surface of the outer race is formed, and a plurality of rolling members disposed in a rolling passage formed by the rolling surface of the outer race and the rolling surface of the inner race, and a cooling medium passage (α, β) is formed so as to be adjacent to either one of the inner race and outer race constituting a rotational driving side. According to the structure mentioned above, a rotary bearing and a rotary table device capable of achieving suitable cooling effect can be provided. | 04-29-2010 |
20100101348 | SCREW DEVICE MANUFACTURING METHOD AND SCREW DEVICE - A method of producing a screw device, having high productivity and capable of achieving sufficient strength of a nut. The method of producing a screw device has a groove forming step for previously forming a load ball rolling groove in a flat plate, which step is followed by a nut forming step for forming a nut by bending the flat plate into a ring. Since the method has, after the groove forming step in which the load rolling groove is formed in the flat plate, the nut forming step in which the flat plate is bent into a ring, sufficient strength of the nut can be easily achieved, and in addition, high compression stress is left in the load ball rolling groove in the inner diameter surface of the nut. | 04-29-2010 |
20100101347 | ROLLER SCREW AND METHOD OF MANUFACTURING THE SAME - The present invention provides a roller screw which bears loads in both directions along the axis of the screw shaft and which is also capable of preventing interference between each roller end surface and roller rolling grooves. Between roller rolling surfaces | 04-29-2010 |
20100098358 | BALL SPLINE DEVICE - Provided is a ball spline device, in which an outer diameter of a nut member can be downsized to the maximum while sufficiently performing an original function, and which can keep reliability while being capable of being simply manufactured at lower cost without involving time and effort in assembly, in which a nut member has a track groove which is formed on an inner peripheral surface facing a spline shaft, the balls circulating in the track groove, the track groove comprises: a linear load groove formed so as to face the ball rolling groove of the spline shaft; a linear non-load groove provided parallel to the linear load groove; and a pair of ball deflection grooves for communicably coupling the linear load groove and the linear non-load groove with each other so as to allow the balls to intercommunicate therebetween, and the ball deflection grooves forcibly change an advancing direction of the balls rolling in the ball rolling groove and cause the balls to depart from the ball rolling groove with use of a profile of the spline shaft. | 04-22-2010 |
20100095793 | STEERING DEVICE USING BALL SCREW - Provided is a steering device which can be reduced in size and weight and easily adapted even to a vehicle with a small engine room, such as a front-wheel-drive car. The steering device includes: a relay rod rotatably supported with respect to a gear casing and having a spiral ball rolling groove formed therein; an input shaft to which rotation of a steering shaft is transmitted; a rotation transmitting means for converting rotation of the input shaft into rotational movement of the relay rod and for allowing the relay rod to move in an axial direction thereof; a screw nut threadedly engaged with the ball rolling groove of the relay rod through an intermediation of a large number of balls and fixed to the gear casing, for allowing the relay rod to move in accordance with rotation of the relay rod in the axial direction thereof; a pair of tie rods for moving steerable wheels in accordance with axial movement of the relay rod; and a pair of spherical bearings for transmitting the axial movement of the relay rod to the tie rods without transmitting the rotational movement of the relay rod to the tie rods. | 04-22-2010 |
20100080496 | MOTION GUIDE DEVICE - Provided is a motion guide device capable of guiding a moving body smoothly without rattle and facilitating separation of the moving body from a main body. The motion guide device includes: a raceway rail having a rolling-element rolling part; a moving block having a rolling-element circulation path including a loaded rolling-element rolling part facing the rolling-element rolling part of the raceway rail and being mounted on the raceway rail movable relative to the raceway rail; a plurality of rolling elements arranged in the rolling-element circulation path of the moving block; and the raceway rail having a mounting member which does not have the rolling-element rolling part and is configured to be mounted onto a counterpart device, and a raceway rail main body which has the rolling-element rolling part and is configured to be mounted on the mounting member detachably. | 04-01-2010 |
20100072924 | METHOD FOR CONTROLLING AC LINEAR MOTORS, DEVICE FOR DRIVING AC LINEAR MOTORS, AND SYSTEM OF AC LINEAR MOTORS - Provided is a method for controlling a plurality of AC linear motors of identical specifications which are connected each other and operated synchronously so that they appear to operate as a single linear motor having desired power. | 03-25-2010 |
20100060087 | DRIVE GUIDE APPARATUS - A drive guide device capable of effectively releasing heat produced by a mover. The drive guide device has a movement unit | 03-11-2010 |
20100058885 | MOTION GUIDE DEVICE - A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide device comprises a track member ( | 03-11-2010 |
20100031856 | WIRELESS ACTUATOR - A wireless actuator has a structure in which movement of a movable table ( | 02-11-2010 |
20100024587 | XY TABLE ACTUATOR - Provided is an XY table actuator that, while building-in a drive means for freely moving an object placed on a table within an XY-plane and positioning the object, can be significantly reduced in size and that helps to suppress an increase in table height. The actuator has: a stationary plate ( | 02-04-2010 |
20090322265 | AC MOTOR DRIVING APPARATUS AND CONTROL METHOD - Provided is an AC motor driving apparatus and an AC motor control method capable of utilizing the conventional PWM system as-is even in an ultra-compact AC motor having an extremely few turns of exciting coil and preventing occurring of vibration and noise. | 12-31-2009 |
20090309529 | POWER BRANCHING SYSTEM AND POWER BRANCHING METHOD - Provided is a power branching system for driving a plurality of motors by use of a single servo driver, the power branching system capable of protecting each of the motors. | 12-17-2009 |
20090307888 | JIG FOR DRIVING CLOSING CAP FOR BOLT INSTALLATION HOLE - Provided is a driving jig for a closing cap which makes it possible to drive a closing cap straight into a bolt installation hole ( | 12-17-2009 |
20090304312 | MOTION GUIDE DEVICE AND ATTACHMENT FOR MOTION GUIDE DEVICE - Provided is a motion guide device having a lubricating path usable for both of grease lubrication and oil lubrication. | 12-10-2009 |
20090301246 | SCREW DEVICE AND METHOD OF MANUFACTURING THE SAME - The present invention provides a screw device which takes a heavy load in one direction along the axis of the screw shaft and only a light load in the opposite direction, the screw device capable of providing ease of control of preloading. | 12-10-2009 |
20090293658 | LOW-NOISE SCREW DEVICE - Provided is a screw device capable of reducing noise generated therefrom. | 12-03-2009 |
20090288511 | ELECTRIC LINEAR ACTUATOR - Provided is an electric linear actuator advantageous in downsizing and weight reduction. The electric linear actuator includes: a housing; a motor held by the housing; a nut member rotatably held with respect to the housing; a screw shaft threadedly engaged with the nut member; a drive shaft directly coupled with the motor; a rotation transmitting member rotatably supported about the drive shaft; a rotary driven member fixed to the nut member and rotated in accordance with the rotation transmitting member; a clutch member to which rotation of the drive shaft is transmitted, and which is provided so as to freely advance and retract in an axial direction of the drive shaft, and in which meshing with the rotation transmitting member is effected at an engagement position, and meshing with the rotation transmitting member is cancelled at a retraction position; and a setting lever capable of setting the clutch member to one of the advance position and the retraction position. | 11-26-2009 |
20090282940 | ROLLING ELEMENT SCREW DEVICE - A rolling element screw device is provided with a power transmission mechanism for moving a retainer ring | 11-19-2009 |
20090279820 | SPHERICAL BEARING AND PROCESS FOR MANUFACTURING THE SAME - Provided are a spherical bearing in which a ball portion ( | 11-12-2009 |
20090278412 | LINEAR MOTOR ACTUATOR - Provided is a linear motor actuator which generates a sufficient thrust force and a retaining force and is remarkably smaller than conventional linear motor actuators. The linear motor actuator includes a base member ( | 11-12-2009 |
20090261663 | LINEAR MOTOR AND METHOD OF MANUFACTURING THE SAME - Provided is a linear motor capable of simplifying assembling of a coil unit and stabilizing a coil pitch and the overall length of the coil unit. | 10-22-2009 |
20090260468 | STEERING DEVICE AND MOVEMENT CONVERTING DEVICE USED THEREFOR - Provided is a novel steering device which can be formed to be compact, which is easily applicable to a vehicle with a small engine room such as a front-engine/front-drive car, and which is of neither the ball nut type nor the rack and pinion type. The steering device operates steerable wheels by converting rotation of a steering shaft to axial movement of a relay rod, the steering device including: a gear casing through which the relay rod is passed; a spiral ball rolling groove provided in the relay rod within the gear casing so as to exhibit a lead of a magnitude of 1 or more; a nut member threadedly engaged with the ball rolling groove of the relay rod through an intermediation of a large number of balls and supported rotatably with respect to the gear casing; an input shaft to which rotation of the steering shaft is transmitted and which is in an intersecting or offset relationship with the relay rod; and a first transmission gear for transmitting rotation of the input shaft to the nut member. | 10-22-2009 |
20090252442 | MOTION GUIDE DEVICE AND METHOD OF LUBRICATING THE SAME - A motion guide device is provided, which is able to not only lubricate rolling-element rolling surfaces with the use of a technique totally different from conventional lubricating techniques but also maintain a lubricating capability over a long period of time. The motion guide device for use in the vacuum environment a track member ( | 10-08-2009 |
20090249912 | ROLLER SCREW - The present invention provides a roller screw capable of circulating rollers smoothly. | 10-08-2009 |
20090249911 | SCREW DEVICE - The present invention provides a screw device enabling insulation of sounds occurring from the inside of the screw device when circulating rolling elements. | 10-08-2009 |
20090218894 | LINEAR MOTOR - A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving. | 09-03-2009 |
20090205425 | STATE DETECTION DEVICE, STATE DETECTION METHOD, STATE DETECTION PROGRAM, AND INFORMATION RECORDING MEDIUM - A state detecting apparatus S for detecting a current operating state of an LM (linear motion) system includes an AE sensor | 08-20-2009 |
20090185765 | LINEAR GUIDANCE DEVICE - Provided is a linear guidance device in which a track groove ( | 07-23-2009 |
20090169139 | MOTION GUIDE DEVICE AND METHOD OF ASSEMBLING MOTION GUIDE DEVICE - A motion guide device is provided which is able to damp the moving block from vibrating in a direction perpendicular to an axis of the raceway rail. | 07-02-2009 |
20090161996 | MOTION GUIDE DEVICE, TABLE APPARATUS, AND DAMPING METHOD FOR MOTION GUIDE DEVICE - A motion guide device that has a novel damping structure different from the conventional damping structure is provided. The present invention comprises a raceway member ( | 06-25-2009 |
20090154850 | MOTION GUIDE DEVICE, RELATIVE MOTION SYSTEM AND DISPLACEMENT ABSORBING MECHANISM - Provided is a motion guide device having a low rigidity in the vertical direction and a low rigidity in the horizontal direction. | 06-18-2009 |
20090154849 | MOTION GUIDE DEVICE - Provided is a motion guide device having a scooping portion that is not damaged even when a moving member is moved at high speed. | 06-18-2009 |
20090152960 | MICRO ACTUATOR - Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to a stroke direction. The micro actuator includes: a spline shaft formed as a cylinder with a hollow part and having an axially extending slit opening; a spline nut fit-engaged with the spline shaft and axially guiding the spline shaft; a pair of end caps fixed to openings at both ends of the spline shaft; a magnet rod supported at both ends within the hollow part of the spline shaft by the end caps; and a forcer loosely fit-engaged with a periphery of the magnet rod within the hollow part of the spline shaft to constitute a linear motor together with the magnet rod and connected with the spline nut through the slit opening. | 06-18-2009 |
20090151493 | ROLLING-ELEMENT SCREW DEVICE AND METHOD OF ASSEMBLING THE SAME - The present invention provides a rolling-element screw device capable of offering advantages of both an end cap type ball screw and a return pipe type ball screw and belonging to an intermediate new category between these ball screws. | 06-18-2009 |
20090149855 | POWER ASSIST CONTROL METHOD, POWER ASSIST CONTROL APPARATUS, AND REDUCTION APPARATUS - Power assist control capable of responding to feeling and sensibility when a man applies force to an object is performed. The power assist control outputs an assist force F or a speed F on the basis of an assist target force X detected by a force sensor | 06-11-2009 |
20090148083 | MOVEMENT GUIDING DEVICE FOR VACUUM ENVIRONMENT - A movement guiding device for a vacuum environment is provided so that the device is able to suppress a base oil vaporized in the vacuum environment from leaking to the outside. The movement guiding device for a vacuum environment according to the present invention comprises a track member ( | 06-11-2009 |
20090146507 | Linear Motor Actuator - A linear motor actuator includes a raceway member | 06-11-2009 |
20090127939 | LINEAR SYNCHRONOUS MOTOR AND LINEAR MOTOR ACTUATOR - Provided is a linear synchronous motor in which, when a three-phase alternating current passes through a coil of a mover, thrust forces generated by the alternating currents of each phase are equalized, thereby making it possible to minimize variation in thrust force, the linear synchronous motor including: a stator magnet ( | 05-21-2009 |
20090123096 | ROLLING GUIDE DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a rolling guide device which can be produced easily and inexpensively by achieving a reduction in the number of parts constituting a slide member ( | 05-14-2009 |
20090100949 | MOTION GUIDE APPARATUS - A linear guide device ( | 04-23-2009 |
20090095099 | SPEED CHANGE MECHANISM AND ROTARY ACTUATOR - A rotary actuator | 04-16-2009 |
20090084212 | SCREW DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a screw device capable of preventing occurrence of any elevation change at a joint between a ball return path of a circulation member and a loaded ball rolling groove of a nut. | 04-02-2009 |
20090070078 | ROLLER SCREW AND METHOD OF DESIGNING UNLOADED ROLLER RETURN PATH THEREOF - Provided is a roller screw having an unloaded roller return path of new shape capable of moving rollers smoothly. | 03-12-2009 |
20090064811 | BALL SCREW DEVICE - Provided is a ball screw device capable of downsizing a nut member ( | 03-12-2009 |
20090060645 | FIXING STRUCTURE OF TRACK RAIL IN GUIDING APPARATUS - Provided is a fixing structure of a track rail, which is capable of fixing the track rail to a base portion without using a fixing bolt, in a case of fixing a guiding apparatus composed of the track rail and a slider to the base portion, and particularly suitable for an extremely small-sized guiding apparatus in which it is difficult to process a tap hole. A structure for fixing a track rail ( | 03-05-2009 |
20090049938 | Electric Actuator - An electric actuator is provided with a power transmission mechanism capable of converting a rotating driving power supplied from an electric motor to a reciprocating motion. This power transmission mechanism is provided with a cylindrical member formed, in its inner peripheral surface, with at least one row of rolling member rolling groove, a nut member disposed to be reciprocally through the rolling members endlessly circulating in the inner peripheral surface of the cylindrical member, and a cylinder rod operatively connected to an end portion of the nut member to be axially movable with respect to the cylindrical member. The reciprocating motion of the nut member in the axial direction is guided by the circular cylindrical member. According to such structure, high output and high controllability can be realized, as well as realizing of a compact electric actuator of a size similar to a conventional hydraulic cylinder. | 02-26-2009 |
20090047063 | BALL JOINT - Provided is a ball joint which enhances a sealing performance between a boot seal ( | 02-19-2009 |
20090045711 | THIN SLIDE UNIT - Provided is a thin slide unit which allows, in a case where two ball plates each formed with a track-like ball groove are combined to thereby construct an endless circulation path for balls, by merely directly connecting the two ball plates without using a guide plate, balls to smoothly circulate, and a slider to smoothly reciprocate with respect to a guide rail. An endless circulation path for the balls of the slider is formed such that the two ball plates each formed with the track-like ball groove are caused to face each other, and that the ball plates are directly connected. Peripheral sides of the two ball plates oppose to each other, to thereby form a load opening portion for causing the balls in the endless circulation path to contact a rolling groove of the guide rail, and form a scooping-up portion for raising the balls from the rolling groove to guide the balls into the endless circulation path. | 02-19-2009 |
20090010577 | Structure for Closing a Rail Mounting Hole - The present invention provides a structure for closing a track rail mounting hole, which prevents a closing cap from being press-fitted with an inclined state into the rail mounting hole, thereby being capable of positively preventing formation of a gap between the rail mounting hole and the closing cap. The closing cap ( | 01-08-2009 |
20090001837 | Hollow Motor Drive Device - A hollow motor drive device includes a screw shaft provided with a spiral screw groove formed in an outer peripheral surface thereof, a nut member screw-engaged with the screw groove, a hollow drive shaft having an inner peripheral side on which the nut member is fixed and an outer peripheral side on which a permanent magnet is disposed, and a housing provided with a bearing portion rotatably supporting the hollow drive shaft and a coil portion. In the hollow drive shaft, the nut member and the permanent magnet are disposed so as not to be overlapped with each other in a direction perpendicular to the axial direction of the hollow drive shaft, and in the housing, the bearing portion is disposed to a position corresponding to the nut member, and the coil portion is disposed to a position corresponding to the permanent magnet. | 01-01-2009 |
20080303356 | Rod-Type Linear Motor - By reviewing a material of a forcer housing and an assembly structure of a coil member with respect to the forcer housing, a thrust force is increased, an optimum shape can be easily given to the forcer housing depending on a purpose of use, and a linear motor can be manufactured at low cost. The linear motor includes a magnet rod composed of a large number of magnetic poles arranged with predetermined pitches along an axial direction and a forcer having a through-hole into which the magnet rod is loosely inserted and reciprocatable relatively to the magnet rod according to an applied electric signal. The forcer is composed of a forcer housing in which the through-hole is defined and a coil member which is arranged on an inner peripheral surface of the through-hole of the forcer housing and to which the electric signal is applied. The forcer housing is formed by mold forming with an insulating nonmetal inorganic material. | 12-11-2008 |
20080253703 | Method of Manufacturing Linear Guide Device and Track Rail For the Linear Guide Device - Provided are a linear guide device and a method of manufacturing a track rail of the linear guide device which make it unnecessary to finish rolling contact surfaces for rolling bodies for the purpose of ensuring parallelism between the rolling contact surfaces after fixing a plurality of rail members, in which the rolling contact surfaces for the rolling bodies are formed, to a rail housing while making it possible to achieve a maximum possible improvement in production efficiency and a reduction in production cost in producing the track rail. The track rail is composed of a pair of the rail members in which rolling contact surfaces for rolling bodies are formed, respectively, and the rail housing equipped with a pair of rail mounting grooves in which those rail members are fitted, respectively. Each of the rail members is fixed within a corresponding one of the rail mounting grooves via an adhesive layer. A reference projection, formed on a bottom of one of the pair of the rail mounting grooves, is in contact with a corresponding one of the rail members without the intermediary of the adhesive layer. The rail member fitted in the one of the rail mounting grooves is adhesively fixed in a state of being abutted against the reference projection. The rail member fitted in the other rail mounting groove is adhesively fixed at a predetermined distance from the reference projection. | 10-16-2008 |
20080246349 | Drive guide apparatus - The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly. | 10-09-2008 |
20080245170 | Roller Screw - A roller screw is provided having a structure suitable for circulating rollers. The roller screw has a screw shaft | 10-09-2008 |
20080217828 | Xy Guide Table - Provided is an XY guide table in which rigidity of portions thereof where ball rolling surfaces are formed is enhanced to thereby eliminate clearances between balls and ball rolling grooves making it possible to guide an upper plate in an X-direction and Y-direction with respect to a lower plate without involving any rattling, and which can be formed in a very thin shape. The XY guide table includes the lower plate, an intermediate plate, and the upper plate assembled with each other through intermediation of the balls. Each of the lower plate and the upper plate has a pair of rail bodies of a substantially rectangular sectional configuration and a storage groove sandwiched between the rail bodies, and is formed in a substantially channel-like configuration. The ball rolling groove is formed in a side surface of each rail body facing the storage groove. The plates are stacked together, with the storage grooves being opposed and orthogonal to each other. The intermediate plate is formed in a substantially rectangular configuration, and has the lower half thereof loosely fitted into the storage groove of the lower plate and the upper half thereof loosely fitted into the storage groove of the upper plate. | 09-11-2008 |
20080212905 | Motion Guide Device - A motion guide device having a novel scoop section structure whose scoop section is not likely to break even if a movement member is moved at high speed. A scoop section ( | 09-04-2008 |