公开(公告)号：US12098060B1

公开(公告)日：2024-09-24

申请号：US18614420

申请日：2024-03-22

申请人： Roadtek Enterprises Inc.

发明人： Dustin Nielson ,  Maggie Hu

IPC分类号： B66F3/42 ,  F15B13/02

CPC分类号： B66F3/42 ,  F15B13/024 ,  F15B2211/30505 ,  F15B2211/50518 ,  F15B2211/55 ,  Y10T137/87185

摘要： Hydraulic jack assemblies are disclosed herein. The hydraulic jack assemblies may include a hydraulic unit base that includes a plurality of pump pistons to output hydraulic fluids with different characteristics that can be selectively used based on load conditions. The hydraulic jack assemblies may additionally or alternatively include a hydraulic fluid release valve that may be opened by an electrically powered driver.

公开(公告)号：US11668074B2

公开(公告)日：2023-06-06

申请号：US17631903

申请日：2020-09-14

申请人： Hitachi Construction Machinery Tierra Co., Ltd.

发明人： Yuichi Ogawa ,  Takeshi Ishii ,  Seiichi Kihara ,  Kiwamu Takahashi

IPC分类号： E02F9/22 ,  B60L1/00 ,  B60L58/13 ,  B60L58/14

CPC分类号： E02F9/2296 ,  B60L1/003 ,  B60L58/13 ,  B60L58/14 ,  E02F9/2221 ,  E02F9/2246 ,  E02F9/2267 ,  B60L2200/40 ,  F15B2211/50518 ,  F15B2211/55 ,  F15B2211/665

摘要： To reduce an increase in the electric power consumption of an electric motor according to the state of an electric power source at the start of driving of an actuator, and make it possible to use devices in an appropriate state in an electrically driven hydraulic construction machine including a driving system that drives a hydraulic pump by using the electric motor. For this purpose, a controller 50 sets a target relief pressure of a relief valve 3 to a normal relief pressure Pn (first relief pressure) when an operation lever device 44 is not being operated and a storage amount SOC(t) of a battery 62 (the state quantity of an electric power source) is equal to or larger than a threshold S1, and sets the target relief pressure to a reduced relief pressure Pr(t) (second relief pressure) lower than the normal relief pressure Pn (first relief pressure) when the operation lever device 44 is not being operated, and the storage amount SOC(t) of the battery 62 (the state quantity of the electric power source) is smaller than the threshold S1.

公开(公告)号：US20180252572A1

公开(公告)日：2018-09-06

申请号：US15973136

申请日：2018-05-07

申请人： Cascade Corporation

发明人： David W. Petronek

IPC分类号： G01G19/10 ,  B66F9/22 ,  B66F9/18

CPC分类号： G01G19/10 ,  B66F9/183 ,  B66F9/184 ,  B66F9/22 ,  F15B2211/30595 ,  F15B2211/55 ,  F15B2211/555 ,  F15B2211/565

摘要： Hydraulic valve circuitry adapted for automatic weight-responsive control of load-clamping members of a load-lifting system having a free lift mast. The load-lifting system generally includes one or more fluid power actuator for applying a gripping force to a load, at least one elongate, longitudinally-extensible fluid power lifting device having a free lift range of motion and at least one main lift range of motion, and manually operated load-clamping and load-lifting selector valves. The hydraulic valve circuitry provides, independently, weight-responsive control of the load-clamping members when lifting a load, full-time automatic weight-responsive force control of the load-clamping members without concurrent manual actuation of load-clamping or load-lifting selector valves, and equalization of sensed load weight so that the sensed load weight is substantially independent of the longitudinally-extensible position of the lifting device.

公开(公告)号：US20180187702A1

公开(公告)日：2018-07-05

申请号：US15741334

申请日：2016-06-30

申请人： SMS group GmbH

发明人： Frank ZENSEN

IPC分类号： F15B11/032 ,  F15B1/24 ,  F15B11/20 ,  F15B13/02 ,  B21J9/12

CPC分类号： F15B11/0325 ,  B21J9/12 ,  B30B15/163 ,  F15B1/027 ,  F15B1/24 ,  F15B11/20 ,  F15B13/025 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/50554 ,  F15B2211/5158 ,  F15B2211/55 ,  F15B2211/6653 ,  F15B2211/6658 ,  F15B2211/7055 ,  F15B2211/7107 ,  F15B2211/76 ,  F15B2211/775

摘要： A hydraulic machine unit that can be operated with various working forces, in which working medium is selectively delivered, via a pump-piston accumulator system, to a main cylinder and at least one driving cylinder, wherein at least for one working stroke a pump system of the pump-piston accumulator system is used to provide working medium to a piston accumulator of the pump-piston accumulator system, and then at least for the working stroke at least the main cylinder is charged with a working pressure from the piston accumulator, and wherein at least for a return stroke the at least one driving cylinder is charged with a return stroke pressure from the pump-piston accumulator system, can be of structurally simple configuration if, at reduced working forces, the working pressure is reduced with respect to the piston accumulator pressure prevailing in the piston accumulator.

公开(公告)号：US09914127B2

公开(公告)日：2018-03-13

申请号：US14399425

申请日：2013-04-26

申请人： SANDVIK INTELLECTUAL PROPERTY AB

发明人： Kristian Burhoff ,  Patrik Sjoberg ,  Andreas Wood

IPC分类号： F15B1/02 ,  B02C1/02 ,  B02C1/00

CPC分类号： B02C1/025 ,  B02C1/005 ,  F15B1/021 ,  F15B2211/3058 ,  F15B2211/50518 ,  F15B2211/55

摘要： A hydraulic system for controlling the position of a movable jaw of a jaw crusher includes a hydraulic cylinder having a piston with a piston rod for positioning the movable jaw. The hydraulic cylinder has a bore side space for containing a hydraulic fluid taking up crushing forces exerted by the movable jaw on the piston rod, and an annular side space containing a hydraulic fluid pressing the piston against hydraulic fluid of the bore side space. The hydraulic system further includes an annular side space accumulator having a fluid compartment, which is in fluid contact with the annular side space, and a gas compartment containing a pressurized gas applying a pressure on the hydraulic fluid in the annular side space.

公开(公告)号：US09850885B2

公开(公告)日：2017-12-26

申请号：US14364177

申请日：2012-12-12

申请人： YANMAR CO., LTD.

发明人： Kunihiko Sakamoto

IPC分类号： F04B1/32 ,  F04B17/05 ,  F04B49/08 ,  F04B49/06 ,  F15B20/00 ,  F15B11/042 ,  E02F9/20 ,  E02F9/22 ,  F04B49/20 ,  F04B1/29

CPC分类号： F04B1/324 ,  E02F9/2079 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F04B1/29 ,  F04B1/32 ,  F04B17/05 ,  F04B49/065 ,  F04B49/08 ,  F04B49/20 ,  F04B2203/0209 ,  F15B11/0423 ,  F15B20/007 ,  F15B2211/20523 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30595 ,  F15B2211/50518 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/526 ,  F15B2211/55 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6652 ,  F15B2211/86

摘要： A working vehicle provided with a fixed-capacity hydraulic pump driven by power from an engine and a working hydraulic actuator driven by working oil pumped from the fixed-capacity hydraulic pump is a rotary working vehicle which is provided with an electromagnetic relief valve for modifying the pressure of working oil from the fixed-capacity hydraulic pump, and the rotary working vehicle is such that if the actual number of revolutions (N) of the engine is reduced by a set number of revolutions (Ns) as the load on the engine increases, then the electromagnetic relief valve operates in accordance with the deviation (e) between the actual number of revolutions (N) of the engine and the specified number of revolutions (Ns), and the pressure of the working oil from the fixed-capacity hydraulic pump is modified.

公开(公告)号：US20170284425A1

公开(公告)日：2017-10-05

申请号：US15391740

申请日：2016-12-27

申请人： KUBOTA CORPORATION

发明人： Yoshimitsu TANAKA ,  Kunihiko BITO ,  Tsukasa HARAGUCHI ,  Toshiaki OTANI ,  Yuji KAWANO ,  Masaru KUMATANI ,  Junki MAEDA ,  Shoichi KAWANO ,  Hitoshi IWAMURA ,  Teruo KUNIZAWA ,  Takehiro WAKASUGI

IPC分类号： F15B11/16 ,  E02F9/22 ,  F15B21/04 ,  E02F3/42 ,  F15B11/10 ,  F15B1/26

CPC分类号： F15B11/168 ,  E02F3/422 ,  E02F9/2221 ,  E02F9/2239 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/26 ,  F15B11/10 ,  F15B21/044 ,  F15B2211/35 ,  F15B2211/55 ,  F15B2211/7052 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/78

摘要： A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve is switchable between a confluent position and an isolation position. The first switch valve is switched to the confluent position such that a first operation fluid tube is connected to a second operation fluid tube and a first transmission fluid tube is connected to a second transmission fluid tube. The first switch valve is switched to the isolation position such that the first operation fluid tube is disconnected from the second operation fluid tube and the first operation fluid tube is disconnected from the second operation fluid tube.

公开(公告)号：US20170253468A1

公开(公告)日：2017-09-07

申请号：US15448516

申请日：2017-03-02

申请人： Liebherr-Werk Ehingen GmbH

发明人： Joerg GEBELE

IPC分类号： B66C23/86 ,  F15B13/02 ,  F15B11/044 ,  F15B11/10

CPC分类号： B66C23/86 ,  F15B11/044 ,  F15B11/10 ,  F15B13/024 ,  F15B13/027 ,  F15B2211/30 ,  F15B2211/30505 ,  F15B2211/3053 ,  F15B2211/3144 ,  F15B2211/351 ,  F15B2211/40561 ,  F15B2211/41554 ,  F15B2211/455 ,  F15B2211/46 ,  F15B2211/50572 ,  F15B2211/5156 ,  F15B2211/5157 ,  F15B2211/55 ,  F15B2211/5753 ,  F15B2211/6658 ,  F15B2211/7058 ,  F15B2211/715

摘要： The present disclosure relates to a hydraulic control circuit for crane slewing gear having directional valves arranged in work lines and controllable separately for the inflow and outflow to the hydraulic motor for the carrying out of a rotational movement of the slewing gear, wherein an inflow valve serves the control of the oil inflow from a hydraulic pump via the work line to the hydraulic motor and an outflow valve is provided via which the hydraulic motor can be relieved to the tank, wherein the work lines are each connected via at least one check valve to a common inlet of the outflow valve to relieve the hydraulic motor independently of the direction of rotation of the slewing gear via an outflow valve into the tank.

公开(公告)号：US20170130742A1

公开(公告)日：2017-05-11

申请号：US15340012

申请日：2016-11-01

申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ,  NISHINA INDUSTRIAL CO., LTD.

发明人： Tetsuya GOTO ,  Kenichi HAGINO ,  Yasushi KUWANO ,  Akihito NIBE ,  Shigeto NAKAJIMA ,  Satoshi TAKANO

IPC分类号： F15B1/26 ,  F15B13/02

CPC分类号： F15B1/26 ,  B66F9/22 ,  E02F9/2228 ,  E02F9/2267 ,  F15B13/024 ,  F15B2211/255 ,  F15B2211/40592 ,  F15B2211/55

摘要： When an engine stall is likely to occur, the pressure of the back pressure chamber of a relief pressure valve is released to adjust the relief pressure of the relief pressure valve. This actuates a pressure compensating circuit to release the pressure in a control circuit to an oil tank. Thus, a rapid increase of the pressure due to a cargo handling operation is restricted, and an engine stall due to insufficient torque of the engine is avoided.

公开(公告)号：US09587652B2

公开(公告)日：2017-03-07

申请号：US14445240

申请日：2014-07-29

申请人： Robert Bosch GmbH

发明人： Igor Glaz ,  Steffen Loritz

IPC分类号： F15B15/06 ,  E02F9/22 ,  F16H61/433 ,  F04B49/00 ,  F04D19/00 ,  F04D25/04 ,  F16H61/431

CPC分类号： F15B15/06 ,  E02F9/2285 ,  E02F9/2296 ,  F04B49/002 ,  F04D19/002 ,  F04D25/04 ,  F15B2211/20553 ,  F15B2211/55 ,  F15B2211/575 ,  F15B2211/5753 ,  F15B2211/5756 ,  F15B2211/6333 ,  F15B2211/6652 ,  F16H61/431 ,  F16H61/433

摘要： A hydrostatic fan drive is operated with a closed circuit and includes a variable-displacement pump with a swept volume that is configured to be adjusted by an adjustment device. The variable-displacement pump is connected by two working lines to a motor that is coupled fixedly in terms of torque to a fan impeller. The fan drive further includes a feed pressure pump and an adjustment pressure line by which the adjustment device is supplied with adjustment pressure medium. A pressure cut-off valve is connected to the adjustment pressure line. The pressure cut-off valve is configured to limit an adjustment pressure, as a function of a high pressure in the working line acting as high-pressure line, to a value such that a certain value of high pressure is not exceeded. The pressure cut-off valve is configured to exhibit pilot control to regulate a working pressure of the variable-displacement pump.

摘要翻译： 流体静力风扇驱动器采用闭路运行，并且包括具有被扫描体积的可变排量泵，其配置为由调节装置调节。 可变排量泵通过两条工作线连接到电动机，该电动机以转矩方式固定地连接到风扇叶轮。 风扇驱动器还包括进料压力泵和调节压力管线，通过该调节压力线向调节装置供应调节压力介质。 压力截止阀连接到调节压力线。 压力截止阀被配置为将作为高压管线的工作线路中的高压的调节压力限制为不超过某一特定值的值。 压力截止阀被配置为展现先导控制以调节可变排量泵的工作压力。