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JP7124610B2 |
To provide a hydraulic equipment capable of supplying hydraulic oil to a hoisting motor via a traveling motor, in which when the hoisting motor and the traveling motor are operated simultaneously, it is prevented that both pressures in t...
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JP7123821B2 |
The present invention provides a work machine including a steering device that is very responsive to switching operations. The work machine includes: a proportional solenoid valve for outputting a first pilot pressure oil with a pressure...
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JP7120511B2 |
An abnormality detecting system (10) and an abnormality detecting method acquires a stroke of a piston (50) as input from outside, calculates a travel time of the piston (50) based on the results of sensing obtained by a first sensor (18...
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JP2022111995A |
To provide an emergency unit for a hydraulic closed circuit motorization system for a transport vehicle.A transport vehicle (1) is driven by a hydraulic closed circuit system (6) that has a variable displacement pump (7) for sending an o...
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JP7096178B2 |
To provide a construction machine capable of continuing operation even when any one of a plurality of valves connecting a plurality of closing circuit pumps to a plurality of actuators is failed.A controller 50 corrects opening/closing c...
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JP2022098283A |
To provide a fluid pressure linear motion actuator that can detect a lateral load applied to a piston rod to improve work efficiency for installation of a cylinder and monitor a state of, for example, wear of a bearing during operation.A...
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JP7089497B2 |
To provide a control device for a work machine that can deal with water mixed in the hydraulic oil used for a hydraulic system of the work machine.A control device 190 of a work machine comprises a storage device 191 that stores a rate-o...
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JP7084325B2 |
The present invention relates to a pneumatically, high pressure gas powered emergency release coupling control and monitoring system (S) comprising a powered emergency released coupling (1) arranged in a fluid-supply line (32) for convey...
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JP7063590B2 |
To detect operations of a fluid pressure actuator with an inexpensive and simple structure.An operation detection device 30 includes a control device 25 which calculates speed change amount of a piston 13 by differentiating detection pre...
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JP2022057405A |
To provide a hydraulic unit which can simplify a constitution for diagnosing abnormality of a hydraulic cylinder.A hydraulic unit comprises: a hydraulic pump for supplying a working fluid to a hydraulic actuator; a motor for driving the ...
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JP2022056033A |
To provide a die cast machine capable of suppressing deterioration in the quality of a hydraulic fluid at a low cost over a long period.A die cast machine comprises: a servo valve (50) arranged at a return flow passage (L4) branched from...
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JP2022050171A |
To detect an abnormal state of a pressurized oil supply/discharge system that has not been detected conventionally.A pump (1) driven by supplying compressed air supplies pressurized oil to a cylinder (10) via a flow passage. A three-way ...
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JP7026472B2 |
A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is ...
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JP2022021452A |
To provide an emergency on-off valve for a charge valve, which is controlled by an air cylinder operated by air control of a solenoid valve, prevents unintentional opening and closing of the charge valve at normal time, and easily and ma...
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JP7011223B2 |
To suppress energy consumption of an air circuit and a turnover device.An air circuit includes a drive air circuit 47 which operates an actuator, and a compressor C which supplies compression air to the drive air circuit 47. The drive ai...
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JP7008777B2 |
To detect or predict the deteriorated state of an accumulator early to prompt an operator to perform proper action.An accumulator deterioration determination processing unit 47 of a controller 45 includes a passing time measurement unit ...
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JP7002232B2 |
Provided is a steering control system capable of preventing undesired operation of a rudder plate driving unit at the occurrence of a failure. The steering control system is provided with: a steering device including a rudder plate drivi...
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JP7002231B2 |
Provided is an operation control system capable of preventing undesired motion of a rudder plate driving unit. The operation control system is provided with a rudder plate driving unit, a hydraulic pump, a directional control valve, a sh...
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JP7001573B2 |
To provide a construction machine for allowing accurate determination of a failure of a variable displacement pump which is controlled in a negative control system, in a simple structure.The construction machine includes a pump regulator...
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JP7001538B2 |
To enhance efficiency of fluid leakage detection in a fluid pressure cylinder.A fluid leakage detection system 100 includes a measuring unit 10 for detecting leakage of working fluid through an annular gap 8 between a piston rod 3 and a ...
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JP6992304B2 |
To provide a work machine capable of preventing hydraulic oil from leaking by ensuring the connected state of first and second members of a joint.The connected state of a plug 46 and a socket 47 is detected, and the detected incomplete c...
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JP2022001775A |
To detect filling pressure in an air chamber of an accumulator even in the middle of the functioning of a liquid-use object.A liquid device with an accumulator comprises: the accumulator 10 which is partitioned to an air chamber 14 and a...
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JP2021195813A |
To provide a technique capable of stopping an actuator in a case of abnormality occurrence in actuator operation system devices in a state where an actuator of a shovel is being driven.A shovel 100 in one embodiment of this invention com...
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JP6982561B2 |
To provide a construction machine capable of detecting failure (malfunction) of an accumulator by using a simple configuration.In the state where an engine 12 is in operation, a lever operation device 23 is operated and a regeneration ch...
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JP6982517B2 |
To prevent an actuator such as a cylinder from operating abruptly in a case where oil leakage occurs due to rupture of a hose or the like.A hydraulic control device is a fluid pressure control device that controls the operation of a cyli...
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JP2021173412A |
To provide a drive device and a fluid pressure drive valve capable of detecting an internal state of a cylinder and improving accuracy of abnormal diagnosis and predictive maintenance.A drive device 12 comprises: a cylindrical cylinder 1...
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JP6954247B2 |
The objective of the present invention is to detect an abnormality in an actuator using a displacement time of a movable portion, irrespective of the ambient temperature and the type of actuator. An abnormality detecting device (10) dete...
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JP2021162152A |
To propose a safety stop mechanism dedicated to a stage device for moving work by using an air actuator, and provide the stage device comprising the safety stop mechanism.A stage device comprises a guide 122, a slider 124, a positive sid...
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JP6944100B2 |
To provide means for quickly detecting the occurrence of the leakage of a working fluid in a working fluid supply/discharge mechanism of a hydraulic cylinder device in either case of the moving of a piston and a stop of the piston.A hydr...
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JP6940992B2 |
Provided is a hydraulic drive device that makes it possible to operate a hydraulic actuator in accordance with operation of an operation device, even when there has been a failure in an electromagnetic proportional control valve or a wir...
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JP6936766B2 |
To enhance efficiency of fluid leakage detection in a fluid pressure cylinder.A fluid leakage detection system 100 includes a measuring unit 10 for detecting leakage of working fluid in a hydraulic cylinder 1, and a controller 80 for acq...
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JP6922956B2 |
A hydraulic unit (1) includes a hydraulic circuit (10) and a control device (20) that controls the hydraulic circuit (10). The hydraulic circuit (10) includes a hydraulic pump (12) that supplies hydraulic oil to a hydraulic actuator (2a)...
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JPWO2019235610A1 |
Provided is a construction machine capable of determining which of a plurality of hydraulic actuators is abnormal with a simple configuration. The construction machine according to the present invention has a first flow rate detector (17...
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JP6904576B2 |
To disclose an automatic feed device comprising a feed housing.An operating space with an opening facing upward is provided inside the feed housing. A hydraulic cylinder is provided at both front and rear ends of the left and right end w...
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JP6907779B2 |
To perform a revolving operation of an upper structure so that moving of the upper structure to a valley side against the revolving operation according to release of a parking brake can be prevented, when the revolving operation of the u...
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JP6901875B2 |
To make it possible to prevent the swing-back phenomenon at a rotation stop without using a contrarotation prevention valve.A construction machine hydraulic drive system comprises: a rotation motor 4; a rotation operating device for outp...
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JP6902298B1 |
To provide a liquid leakage port attachment device which can be easily attached to an existing hydraulic cylinder device not provided with a liquid leakage port at an installation site. An inner peripheral portion 3 in which an extending...
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JP6901441B2 |
To provide a hydraulic driving device capable of accurately measuring a leakage flow rate of a hydraulic pump regardless of a level of a leakage flow rate of a relief valve.A controller 30 holds a discharge flow rate of a first hydraulic...
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JP6902508B2 |
There is provided a hydraulic drive device for a working machine with which a number of times of maintenance can be reduced. A controller (20) opens a first on-off valve (25a), closes a second on-off valve (25b), switches a first directi...
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JP6903564B2 |
To provide a work vehicle capable of securely detecting abnormality in hydraulic pumps arranged on the work vehicle which is provided with the plurality of hydraulic pumps.A work vehicle having a plurality of actuating parts comprises: a...
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JP6899627B2 |
To provide a fluid circuit capable of easily technologically controlling a fluid-type driven machine with high dynamic characteristic and high accuracy, and resolving defects in a conventional technology.A fluid circuit for controlling a...
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JP2021095728A |
To provide a construction machine that can accurately determine the failure of variable displacement pumps controlled by the negative control method while suppressing cost increase.A hydraulic excavator comprises a variable displacement ...
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JP6886405B2 |
Hydraulic equipment of the type that can be fixed to a moving arm of an operating machine. The equipment has a support structure connected or connectable to a moving arm of an operating machine, at least one hydraulic motor for the rotat...
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JP6879285B2 |
In order to provide an error detection device having excellent convenience, this error detection device (6) comprises: an operation time acquisition unit (611) that obtains a plurality of operation times for a plurality of air cylinders ...
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JP6879284B2 |
In order to achieve an error detection device that has excellent convenience, this error detection device (6) comprises: an action time acquisition unit (611) that obtains the compression time and return time of pistons (531) in an air c...
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JP6871627B2 |
To disclose a safety feed device comprising a feed housing.An operating space with an opening facing upward is provided inside the feed housing. A hydraulic cylinder is provided at both front and rear ends of the left and right end walls...
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JP6868166B2 |
A microcomputer of a detector that constitutes part of a monitoring device calculates differential pressures (first differential pressure, second differential pressure) between a first pressure value detected by a first pressure sensor p...
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JP6871626B2 |
To disclose a material processing device comprising a feed housing.An operating space with an opening facing upward is provided inside the feed housing. A hydraulic cylinder is provided at both front and rear ends of the left and right e...
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JP6861501B2 |
To provide a hydraulic actuator system, a fluid valve, and a steam turbine capable of suddenly closing a fluid valve body in a short time.A hydraulic actuator system comprises: a hydraulic pump 35 provided in a pipe line 33 connecting be...
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JP6859637B2 |
To provide a pressure increasing device for a high lift work vehicle enabling a disadvantage at the pressure increasing device to be detected.This invention relates to a pressure increasing device for a high lift work for use in supplyin...
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