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11. 发明申请

US20220154738A1 WORK MACHINE AND CONTROL METHOD 有权
公开(公告)号：US20220154738A1
公开(公告)日：2022-05-19
申请号：US17432350
申请日：2020-04-02
申请人： KOMATSU LTD.
发明人： Akira NAKASHIMA , Shinobu KAMIKAWA
IPC分类号： F15B11/08 , F15B13/042
摘要： An HST circuit has a hydraulic pump that converts a drive force of an engine into energy of oil, and a hydraulic motor that converts the energy of the oil converted by the hydraulic pump into drive energy. Pressure sensors detect a pressure of the oil within the HST circuit. A variable charge pump replenishes the oil into the HST circuit. A controller controls a capacity of the variable charge pump based on the pressure of the oil within the HST circuit detected by the pressure sensors.

12. 发明授权

US11268542B2 Actuator control valve arrangement 有权
公开(公告)号：US11268542B2
公开(公告)日：2022-03-08
申请号：US16710370
申请日：2019-12-11
申请人： GOODRICH ACTUATION SYSTEMS SAS
发明人： Raphael Medina
IPC分类号： B64C13/50 , F15B11/12 , F15B11/08 , F15B15/20 , F15B20/00
摘要： An actuator control arrangement includes a hydraulic actuator having a housing and a piston rod axially moveable within the housing, a stop disposed within the housing to limit the extent of movement of the piston rod into the housing, and a solenoid valve arranged between a pressure source and the actuator. The solenoid valve is switchable between a first mode and a second mode in response to an electric control signal, wherein, in the first mode, the solenoid valve creates a fluid flow path from the pressure source to the actuator so as to locate the stop in its neutral position and in the second mode, the solenoid valve creates a fluid flow path to release pressure from the actuator to permit the stop to move to its retracted position. In the event of electrical failure, the stop will set the actuator to its neutral position.

13. 发明授权

US11224164B2 Damped float response on an agricultural harvester 有权
公开(公告)号：US11224164B2
公开(公告)日：2022-01-18
申请号：US16392120
申请日：2019-04-23
申请人： Deere & Company
发明人： Alex Brimeyer , David E. Renner , Praveen Kumar Singh , Todd M. Verhoef
IPC分类号： A01D41/14 , A01D41/127 , A01B63/00 , A01B63/108 , F15B13/04 , A01B63/10 , F15B21/00 , F15B13/043 , F15B11/08 , F15B21/08
摘要： A header assembly for an agricultural harvesting machine having a traction unit comprises a cutter, a main frame that supports the cutter, a float cylinder configured to be coupled between the main frame and the traction unit, an accumulator, and fluidic circuitry that fluidically couples the accumulator to the float cylinder. The fluidic circuitry is configured to provide a first flow of pressurized fluid under pressure to the float cylinder, so the float cylinder exerts a float force on the main frame, and, based on a control input that corresponds to a lifting operation of the header assembly, provide a restricted flow of fluid, that is restricted relative to the first flow, between the float cylinder and the accumulator.

14. 发明授权

US11181126B2 Systems and methods for operating a direct current hydraulic pump 有权
公开(公告)号：US11181126B2
公开(公告)日：2021-11-23
申请号：US15889854
申请日：2018-02-06
申请人： Kar-Tech, Inc.
发明人： Hassan Karbassi
IPC分类号： F15B11/04 , F15B11/042 , F15B13/044 , F15B11/08
摘要： System and methods for a DC powered hydraulic system capable of providing control over pressurized hydraulic fluid delivered to directional valves without the need for a PTO and/or a proportional valve. The hydraulic system controls the output from a battery to a direct current hydraulic pump.

15. 发明授权

US11136940B2 Hydraulic thrust reverser actuation system 有权
公开(公告)号：US11136940B2
公开(公告)日：2021-10-05
申请号：US16711897
申请日：2019-12-12
申请人： Goodrich Actuation Systems Limited
发明人： Tim Hudson , Brett Wharton
IPC分类号： F02K1/76 , F15B15/26 , F15B11/08
摘要： A hydraulic thrust reverser system (TRAS) including a first return line having a first check valve therein, and a second return line having a second check valve therein, wherein the first return line and the second return line are in fluid communication with each other via a fluid restrictor located upstream of the first and second check valves, wherein the first return line extends from a piston system of the TRAS, the piston system being for moving at least one thrust reverser door, and wherein the second return line extends from a lock system of the TRAS, the lock system being for controlling locks to selectively prevent the movement of the at least one thrust reverser door.

16. 发明申请

US20210285530A1 HYDRAULIC CONTROL UNIT FOR LIMITED SLIP DIFFERENTIAL 有权
公开(公告)号：US20210285530A1
公开(公告)日：2021-09-16
申请号：US17333081
申请日：2021-05-28
申请人： Eaton Intelligent Power Limited
发明人： Matthew G. Fox , Jeffrey A. Oesch , Andrew N. Edler
IPC分类号： F16H48/32 , F15B1/26 , F15B1/02 , F15B11/08 , F16H61/00
摘要： A hydraulic control unit that delivers hydraulic fluid to a limited slip differential includes a hydraulic control unit housing having a manifold housing portion and an accumulator housing portion. The accumulator housing portion and manifold housing portion cooperate to form an accumulator chamber that houses the biasing assembly and the piston. A motor is disposed on a first side of the manifold housing portion, and a pump is disposed on a second side of the manifold portion, opposite the first side. The pump is configured to pump fluid into the accumulator chamber of the accumulator housing portion. A reservoir is defined by at least one of the manifold housing portion and the accumulator housing portion, and a bag filter disposed in the reservoir is configured to filter fluid flowing through the reservoir.

17. 发明授权

US11118327B2 Work machine 有权
公开(公告)号：US11118327B2
公开(公告)日：2021-09-14
申请号：US17057414
申请日：2019-06-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroyuki Kobayashi , Yoshiyuki Tsuchie , Hidekazu Moriki , Hiroshi Sakamoto
IPC分类号： E02F9/22 , F15B21/045 , F15B11/028 , F15B11/08
摘要： Provided is a work machine with which responsiveness of a hydraulic actuator can be improved when driving the hydraulic actuator through an electric lever-type operation device. A controller 100 further includes: an operation direction determining section 116 configured to determine operation directions of operation devices 2a and 2b; and a standby pressure switching command section 117 configured to output a standby pressure switching command to a first target pilot pressure correction section 112 or a second target pilot pressure correction section 113 which corresponds to a solenoid proportional valve that does not correspond to the operation direction from among first solenoid proportional valves 41a, 42a, 42b, 43a, 43b, and 44a and second solenoid proportional valves 41b, 42c, 42d, 43c, 43d, and 44b. The first target pilot pressure correction section and the second target pilot pressure correction section are configured to switch a first standby pressure α to a second standby pressure β set lower than the first standby pressure in a case in which the standby pressure switching command has been inputted.

18. 发明申请

US20210229962A1 CRANE HYDRAULIC SYSTEM AND CONTROLLING METHOD OF THE SYSTEM 有权
公开(公告)号：US20210229962A1
公开(公告)日：2021-07-29
申请号：US17228005
申请日：2021-04-12
申请人： XUZHOU HEAVY MACHINERY CO., LTD.
发明人： Zenghai Shan , Xiaodong Hu , Guowang Jiao , Bin Zhou , Conglin Yuan
IPC分类号： B66C13/20 , B66D1/08 , F15B13/04 , F15B13/16 , F15B11/08 , F15B11/05
摘要： A crane hydraulic system and a controlling method of the system is provided in order to fundamentally reduce impact in start and stop operations of a load sensing winch system. The load sensing subsystem is arranged, at the start and stop moments of a winch system, the pressure compensator can be opened, and the variable pump oil inlet line communicates with the oil return line to realize pressure relief, so as to reduce the pressure impact.

19. 发明授权

US11053957B2 Actuating drive having a hydraulic outflow booster 有权
公开(公告)号：US11053957B2
公开(公告)日：2021-07-06
申请号：US16772246
申请日：2018-12-14
申请人： MOOG GmbH
发明人： Achim Helbig , Sascha Dany , Udo Koelbl , Werner Haendle
IPC分类号： F01D17/26 , F15B11/08 , F15B21/14
摘要： An electro-hydrostatic actuating drive has a variable-volume and/or variable-speed hydraulic machine, which is driven by an electric motor, for the provision of a volumetric flow of a hydraulic fluid. Furthermore, the actuating drive comprises a cylinder with a piston, a piston rod and a first piston chamber, a valve with a first position and a second position, which valve can be moved by a first hydraulic actuator into the first position and by a second hydraulic actuator into the second position, wherein the second position controls a greater volumetric flow of the hydraulic fluid than the first position, a sink, a main line which connects a first piston chamber of the cylinder to the sink and in which the hydraulic machine is arranged, an auxiliary line which connects the first piston chamber to the sink and in which the valve is arranged, a first control line to the first hydraulic actuator, and a second control line to the second hydraulic actuator. A hydraulic resistor is arranged in the main line in series with the hydraulic machine, the first control line is connected to the main line, and the second control line is connected between the hydraulic resistor and the first piston chamber.

20. 发明授权

US10983539B2 Work machine 有权
公开(公告)号：US10983539B2
公开(公告)日：2021-04-20
申请号：US16306908
申请日：2017-06-01
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Yoshiyuki Tsuchie , Hiroshi Sakamoto
IPC分类号： F16K31/02 , G05D16/08 , F16K13/10 , E02F9/20 , E02F9/22 , F15B11/08
摘要： A work machine includes an operation intention determining section that determines whether or not an operator has an intention of operating an operation member based on a state change of the operation member, a current supply section that supplies a current to a solenoid valve device based on an operation of the operation member, and a current control section that permits supply of a standby current from the current supply section to the solenoid valve device when it has been determined by an operation position determining section that the operation member is disposed within a preset neutral range and it has been determined by the operation intention determining section that there is an intention of operating the operation member, the standby current being lower than a current of the time when a hydraulic actuator starts driving.

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