Kobelco Cranes Co., Ltd. Patent applications |
Patent application number | Title | Published |
20160131059 | EXHAUST GAS PURIFICATION CONTROL DEVICE FOR CONSTRUCTION MACHINE - An exhaust gas purification control device includes an engine, an actuator using the engine as a driving source, an operation unit used by an operator to operate the actuator or the engine, an operation detector detecting whether or not the operation unit is being operated, a purification device for capturing soot in exhaust gas of the engine, an accumulation amount detector detecting an accumulation amount of the soot captured by the purification device, a regeneration unit for performing an regenerating operation of regenerating the purification device by burning the soot captured by the purification device, and a controller controlling the regenerating operation. The controller switches a control from a control of prioritizing an operation by the operation unit to a control of prioritizing the regenerating operation in a stepwise manner as the accumulation amount of the soot detected by the accumulation amount detector increases. | 05-12-2016 |
20140263140 | RAISABLE-LOWERABLE MEMBER - Disclosed is a raisable-lowerable member which comprises a boom and a jib. The boom comprises a first supporting portion configured to rotatably support a jib foot when the jib is set in a protruding posture; and a second supporting portion configured to rotatably support a supportable portion of the jib when the jib is set in an enfolded posture. A position adjusting and holding unit of the jib is configured to couple, to the frame, a specific site of the second link in such a manner that a relative position of the second link with respect to the frame in a rotational direction of the second link is adjustably changed to allow the rotational axis of the second joint portion to become coincident with the rotational axis of the jib foot, and to hold the second link at the changed relative position. | 09-18-2014 |
20140209552 | RAISABLE-LOWERABLE MEMBER FOR CRANE - Provided are a raisable-lowerable member capable of shortening a time required for assembling and disassembling of a crane, and a crane comprising the raisable-lowerable member. The raisable-lowerable member comprises: a boom attachable to an upper slewing body of the crane turnably about a boom-pivot-turn-axis in a raising-lowering direction; and a mast to be driven so as to be turned about a mast pivot-turn-axis parallel to the boom-pivot-turn-axis. The boom includes a boom body, a boom foot joined to a basal end of the boom body and adapted to be attached to the upper slewing body turnably about the boom-pivot-turn-axis, and a mast mounting portion joined to the basal end of the boom body. The mast has a basal end which includes a mast foot to be attached to the mast mounting portion turnably about the mast pivot-turn-axis. | 07-31-2014 |
20140130488 | HYDRAULIC DRIVE APPARATUS FOR WORK MACHINE - Provided is a hydraulic drive apparatus for working machine capable of preventing an excessive pressure reduction on a meter-in side and moving a load in a lowering direction at a stable speed requiring no counter balance valve. The apparatus includes a hydraulic pump, a hydraulic actuator for lowering the load, an operating device, a hydraulic circuit including a meter-in flow passage, a meter-out flow passage and a regeneration flow passage, a control valve, a meter-in-flow-rate controller for controlling a meter-in flow rate, a meter-out-flow-rate controller for controlling a meter-out flow rate to one not lower than the meter-in flow rate, a back pressure generator located downstream of the regeneration flow passage in the meter-out flow passage, and a meter-out-flow-rate limiter. The meter-out-flow-rate limiter minimizes a flow passage area of the meter-out orifice when a pressure in the meter-in flow passage falls to or below a permissible pressure. | 05-15-2014 |
20140130486 | HYDRAULIC DRIVE APPARATUS FOR WORK MACHINE - Provided is a hydraulic drive apparatus for working machine capable of preventing an excessive pressure drop on a meter-in side and moving a load in a lowering direction at a stable speed requiring no counter balance valve, including a hydraulic pump, a first hydraulic actuator lowering a first load, an operating device, a first hydraulic circuit including meter-in and meter-out flow passages, a control valve, a meter-in-flow-rate controller, a meter-out-flow-rate controller making a meter-out flow rate not lower than a meter-in flow rate, a second hydraulic actuator, a second hydraulic circuit between the first hydraulic circuit and a tank and for the second hydraulic actuator, a back pressure valve between the second hydraulic circuit and the tank, a regeneration line leading a part of hydraulic fluid from between the second hydraulic circuit and the back pressure valve to the meter-in flow passage, and a check valve in the regeneration line. | 05-15-2014 |
20140083964 | CRANE AND CRANE ASSEMBLING METHOD - Provided is a crane which comprises a luffing jib including a lower jib and an upper jib coupled to the lower jib in such a manner as to be separable from the lower jib, the lower jib is attached to a head of a boom to have a laid-down posture at a position between the boom and a strut when the upper jib is separated from the lower jib, when the boom is lowered and laid down to allow the head of the boom to come into contact with a ground and when the strut is lowered and laid down to allow a distal end of the strut to come into contact with the ground, and the lower jib has a length which causes no interference with the strut when the lower jib has the laid-down posture at the position between the boom and the strut. | 03-27-2014 |
20130152575 | HYDRAULIC DRIVING APPARATUS FOR WORKING MACHINE - Provided is a hydraulic driving apparatus for a working machine, preventing an excessive decrease in pressure on a meter-in side and moving a load at a stable speed in a lowering direction. The apparatus comprises: a hydraulic pump; a hydraulic actuator; a manipulation device; a working hydraulic circuit including a meter-in flow passage and a meter-out flow passage; a control valve for changing a state of supply of hydraulic fluid to drive the hydraulic actuator at a speed designated by the manipulation device; a meter-in flow adjuster and a meter-out flow adjuster adapted to adjust a meter-in flow rate and meter-in flow rate respectively to respective value corresponding to the speed designated by the manipulation device; and a relief valve. The meter-in and meter-out flow adjusters have respective flow adjustment characteristics such that the meter-in flow rate is greater than the meter-out flow rate. | 06-20-2013 |
20130105429 | CRANE EQUIPPED WITH TRAVELABLE COUNTERWEIGHT UNIT | 05-02-2013 |
20130082517 | OPERATING MACHINE - An operating machine includes: a charging time estimation unit that estimates a first estimated charging time required to restore a capacity of a first battery from a first estimated residual capacity to a target capacity value of the first battery and a second estimated charging time required to restore a capacity of a second battery from a second estimated residual capacity to a target capacity value of the second battery; a capacity management implementation unit that implements capacity management on the first battery and the second battery such that the first battery is charged for the first estimated charging time and the second battery is charged for the second estimated charging time; and a discharge amount limitation unit for limiting a discharge amount of the second battery during an idling stop so that a residual capacity of the second battery after discharge is maintained at or above a set value. | 04-04-2013 |
20120285159 | HYDRAULIC DRIVING APPARATUS FOR WORKING MACHINE - Provided is an apparatus provided in a working machine to lower a load, comprising a hydraulic pump, a hydraulic actuator, a manipulation device having a manipulation member, a meter-in flow control device, a meter-out flow control device, a back pressure valve, a regeneration fluid passage branched from the meter-out fluid passage at a position upstream of the back pressure valve and merged with the meter-in fluid passage, and a check valve. The meter-in flow control device controls a meter-in flow rate in a region of the meter-in fluid passage upstream of a merging point with the regeneration fluid passage. The meter-out flow control device controls a meter-out flow rate in a region of the meter-out fluid passage upstream of a branching point of the regeneration fluid passage so as to make the meter-out flow rate be greater than the meter-in flow rate. | 11-15-2012 |
20120285152 | HYDRAULIC DRIVING APPARATUS FOR WORKING MACHINE - Provided is an apparatus to lower a load, comprising a hydraulic pump, a hydraulic actuator having first and second ports, a manipulation device, a hydraulic circuit including meter-in and meter-out flow passages for the first and second ports respectively and a regeneration flow passage with a check valve, a control valve, a meter-out flow controller adjusting a meter-out flow rate according to the manipulation device, a back pressure valve, and a non-regeneration operation relief valve whose set pressure is not less than a sum of a minimum set pressure of the back pressure valve, an inlet-outlet pressure difference of the meter-out flow controller when the meter-out flow rate is maximum and a discharge flow rate of the hydraulic pump is maximum, and an actuator pressure difference for driving the hydraulic actuator with no load, and not less than a maximum set pressure of the back pressure valve. | 11-15-2012 |
20120227388 | CONSTRUCTION MACHINE - Disclosed is a construction machine which comprises: a command changing regulation section; a loading device for imposing, on an engine, a load for raising an exhaust temperature of the engine up to a value at which particulate matter accumulated in a filter is burnt; and an instruction section for instructing the loading device to perform an operation for loading the engine. The instruction section prohibits the loading device from changing a loading level on the engine, during a period where a manipulation-state detection section detects a presence of a manipulation of a manipulation section. The command changing regulation section is set to a changing permission mode for permitting a value of a command which is to be assigned to an actuator control valve, to be changed according to changing a value of a command to be output from a manipulation device, during a period where the loading level is constant. | 09-13-2012 |
20120152878 | CRANE - A crane includes a limiting device to limit a raising/lowering angle of the mast during suspending work to be equal to or less than an upper limit angle which is less than a value of the raising/lowering angle when the mast extends vertically; a release device into which a release instruction for causing the limiting device to release the limitation on the raising/lowering angle of the mast is input; and a first detection section adapted to detect that the mast support device is at an overhanging position where the mast support device pushes up and sets the mast in the work posture. The limiting device is operable whenever the first detection section does not detect that the mast support device is at the overhanging position, even if the release instruction is input into the release device, to prohibit the mast from being tilted rearward beyond the upper limit angle. | 06-21-2012 |
20120143460 | ENGINE CONTROL APPARATUS FOR WORKING MACHINE - An engine control apparatus includes a governor and a controller which derives a lever operation-related rotational speed control target value derives an accelerator operation-related rotational speed control target value-corresponding to a detected operation amount of the accelerator member, based on an accelerator operation/rotational speed correlation function defining a relationship between the rotational speed control target value and the operation amount of the accelerator member; performs a lower value selection for selecting a lower one of the derived lever operation-related rotational speed control target value and accelerator operation-related rotational speed control target value; and causes the governor to control the rotational speed of the engine such that the rotational speed of the engine is set to the rotational speed control target value selected by the lower value selection. | 06-07-2012 |
20110290751 | LATTICE BOOM - In a lattice boom, a first reinforcing lattice member includes a first reinforcing pipe which has a portion extending in the same direction as a first main member of a base boom and which is separated outward from a first side surface of the base boom and a first mounting part which is provided on the first reinforcing pipe and which is mounted to the first main member so as to transfer a load acting on the first main member in an axial direction of the first main member to the first reinforcing pipe, and a second reinforcing lattice member includes a second reinforcing pipe which has a portion extending in the same direction as a second main member of the base boom and which is separated outward from a second side surface of the base boom and a second mounting part which is provided on the second reinforcing pipe and which is mounted to the second main member so as to transfer a load acting on the second main member in an axial direction of the second main member to the second reinforcing pipe. | 12-01-2011 |
20110276261 | CRANE OPERATION EVALUATION DEVICE - A crane operation evaluation device for evaluating an operation status of an operator of a crane performing a crane work by using drive power of an engine. The crane operation evaluation device includes: a display device provided at a position of the crane that is visible to the operator and serving to display predetermined data; a detector for detecting a state of a given part of the crane; and a data control unit that, after a stopping operation of the engine, derives a first fuel consumption index for analyzing a fuel consumption efficiency of the crane work performed between the most recent start of the engine and the stop of the engine by the stopping operation and a first work index for analyzing content of such crane work, on the basis of detection data of the detector, and causes the display device to display the derived first fuel consumption index and first work index. | 11-10-2011 |
20110192815 | MOBILE CRANE HAVING COUNTERWEIGHT - Provided is a mobile crane capable of adjusting a counterweight height with no use of a costly hydraulic cylinder. The mobile crane comprises a lower propelling body, a upper slewing body, a boom pivotably attached to the upper slewing body, a mast which is at the rear of the boom and adapted to be raised and lowered so as to raise and lower the boom, a counterweight which is at the rear of the upper slewing body and hung from the mast through a guy line, and a counterweight-lifting cylinder attached to the counterweight so as to be extended to vertically push up the counterweight with respect to a ground surface. The counterweight-lifting cylinder has a cylinder body, a piston partitioning an internal space of the cylinder body into an upper head-side cylinder chamber and a lower rod-side cylinder chamber, and a rod extending from the piston downwardly beyond an lower end of the cylinder body. the counterweight-lifting cylinder is extended by supply of a hydraulic pressure into the head-side cylinder chamber and retracted by supply of a hydraulic pressure into the rod-side cylinder chamber. | 08-11-2011 |
20100264106 | SLEWING STOP CONTROL APPARATUS AND METHOD FOR SLEWING TYPE WORKING MACHINE - This invention provides a slewing stop control apparatus and method, capable of executing, while performing the control of determining the target slewing velocity based on a remaining slewing angle from the actual slewing motion position up to the slewing stop angular position, an automatic control of re-slewing the slewing structure having been stopped before the slewing stop angular position due to disturbance to move it to the slewing stop angular position without inconvenience. The apparatus executes slewing angular velocity control for deciding the slewing braking start timing to stop the slewing structure at a slewing stop angular position in accordance with a predetermined slewing deceleration and the subsequent target slewing angular velocity, based on the remaining slewing angle of the slewing structure. When the slewing structure stops before the slewing stop angular position due to disturbance despite the foregoing control, the target slewing angular velocity is corrected to be increased for generating slewing torque to restart the slewing. | 10-21-2010 |
20100263364 | BRAKING CONTROL APPARATUS FOR SLEWING TYPE WORKING MACHINE - Provided is a braking control apparatus for a slewing type working machine capable of giving a braking operation easily intuitively grasped. This apparatus includes: a flow control valve actuator increasing an opening of a flow control valve between a slewing hydraulic motor and a hydraulic pump according to an operation amount of a slewing operation member; pressure control valves limiting respective maximums of an inlet and outlet pressures of the hydraulic motor to a set value corresponding to a pressure command signal to be input; a motor-side pressure controller which retains a set pressure of the motor inlet sided pressure control valve to a pressure for motor driving and lets a set pressure of the motor outlet side pressure control valve be a set pressure for a braking torque corresponding to an operation amount of a braking operation member other than the slewing operation member; and a valve opening limiter reducing the opening of the flow control valve in correspondence with the operation of the braking operation member. | 10-21-2010 |
20100205955 | HYDRAULIC CIRCUIT OF WINCH FOR CRANE - Second-gear blocking switching valves | 08-19-2010 |
20090159547 | BOOM COMPONENT DISPLAY APPARATUS - A boom component display apparatus | 06-25-2009 |
20090159346 | CRAWLER CRANE - In a crawler crane of the present invention, a plurality of winches | 06-25-2009 |
20080302749 | COMBINATION CRANE - A combination crane A is formed by connecting two crawler cranes | 12-11-2008 |
20080217992 | CRAWLER VEHICLE - In a crawler vehicle according to the present invention, at the time of crane operation at a place where a grounding space of crawlers is limited, a land leveling preparation is suppressed as less as possible so as to improve efficiency of the operation. The crawler vehicle according to the present invention has a high performance. The crawler vehicle according to the present invention is provided with a pair of left and right crawler frames on the both left and right sides of a track frame. The crawler frames can be moved between an expansion position for maximizing a distance between centers of the crawlers and a contraction position for minimizing the distance. Further, the crawler vehicle according to the present invention can position the crawler frames to the track frame at an intermediate position in the middle of the expansion position and the contraction position. | 09-11-2008 |