公开(公告)号：US20240159256A1

公开(公告)日：2024-05-16

申请号：US18284255

申请日：2022-03-25

申请人： HUSCO International, Inc.

发明人： Tom Peterson ,  Andrew Kundert ,  Casey Buschkopf

IPC分类号： F15B21/04 ,  E02F9/22

CPC分类号： F15B21/04 ,  E02F9/2267 ,  F15B2201/405 ,  F15B2211/322 ,  F15B2211/41536 ,  F15B2211/45 ,  F15B2211/50554 ,  F15B2211/5154 ,  F15B2211/555 ,  F15B2211/7121

摘要： A return manifold includes a housing having a first workport, a second workport, a third workport, and a fourth workport, and defining a first chamber and a second chamber. The return manifold includes a back-pressure disk arranged between the first workport and the first chamber, a bypass disk arranged between the first chamber and the second chamber, a back-pressure spring biased between the back-pressure disk and the bypass disk, and a bypass spring biased against the bypass disk. The back-pressure disk and the bypass disk are hydro-mechanically coupled so that movement of the bypass disk alters a force on the back-pressure disk and movement of the back-pressure disk alters a force on the bypass disk.

公开(公告)号：US20240099175A1

公开(公告)日：2024-03-28

申请号：US18475382

申请日：2023-09-27

申请人： DEERE & COMPANY

发明人： MANUEL BILLICH

IPC分类号： A01B63/10 ,  F15B11/22

CPC分类号： A01B63/1006 ,  F15B11/22 ,  F15B2211/50554

摘要： An arrangement for controlling a hydraulic three-point hitch includes a hydraulic cylinder, first and second seat valves, and first and second pressure compensation valves. The hydraulic cylinder includes a working chamber, by which pressurized hydraulic fluid changes a lifting position of a lower arm of the hydraulic three-point hitch. The first and second seat valves are in fluid communication with the working chamber. The first seat valve selectively produces a flow connection to a high-pressure source. The second seat valve selectively produces a return connection to a hydraulic reservoir. The first pressure compensation valve is connected upstream of the first seat valve in a first through-flow direction. The second pressure compensation valve is connected upstream of the second seat valve in a second through-flow direction.

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：US09752596B2

公开(公告)日：2017-09-05

申请号：US15049168

申请日：2016-02-22

申请人： Precision Planting LLC

发明人： Derek A. Sauder ,  Jeremy J. Hodel

IPC分类号： A01B63/00 ,  F15B11/042

CPC分类号： F15B11/042 ,  A01B63/008 ,  F15B2211/3057 ,  F15B2211/50554 ,  F15B2211/7053

摘要： A variable pressure control system for varying pressures in the fluid circuits of a dual acting actuator over a range of pressures. The variable pressure control system includes a controller that cooperates with pressure regulators for regulating the desired pressure in the fluid circuits.

公开(公告)号：US09728314B2

公开(公告)日：2017-08-08

申请号：US14609626

申请日：2015-01-30

申请人： BorgWarner Inc.

发明人： Jeffrey J. Waterstredt ,  R. Keith Martin

IPC分类号： F16K31/02 ,  H01F7/08 ,  F16K35/00 ,  F15B11/16 ,  F15B13/02 ,  F15B13/042 ,  F15B13/044 ,  F16K31/06 ,  H01F7/128

CPC分类号： H01F7/088 ,  F15B11/16 ,  F15B13/025 ,  F15B13/042 ,  F15B13/044 ,  F15B2211/50554 ,  F15B2211/71 ,  F15B2211/78 ,  F16K31/0613 ,  F16K31/0668 ,  F16K31/0675 ,  F16K35/00 ,  H01F7/128

摘要： A latching solenoid assembly is provided which includes a solenoid actuator. A housing is also provided which has an axial passage. An intermediate piston is moved by the solenoid actuator. A reaction member is also placed within the housing axial passage spring biased by a transfer spring from the intermediate piston. The housing has a latching port allowing pressure to latch the intermediate piston in position to set the force which is transmitted to the reaction member.

公开(公告)号：US20170159263A1

公开(公告)日：2017-06-08

申请号：US15371287

申请日：2016-12-07

申请人： Liebherr-Hydraulikbagger GmbH

发明人： Simon Meier ,  Thomas Zitterbart

IPC分类号： E02F3/36 ,  E02F3/38

CPC分类号： E02F3/3663 ,  E02F3/3686 ,  E02F3/369 ,  E02F3/382 ,  E02F9/2217 ,  F15B1/022 ,  F15B2211/212 ,  F15B2211/30515 ,  F15B2211/30565 ,  F15B2211/40507 ,  F15B2211/41509 ,  F15B2211/50554 ,  F15B2211/50563 ,  F15B2211/5151 ,  F15B2211/5153 ,  F15B2211/8633

摘要： The invention relates to a valve unit for the exclusive hydraulic actuation of the locking means of a mechanical quick-changer for attachments of a construction machine, wherein the valve unit comprises a feed pressure connector for applying the feed pressure, a first valve unit outlet for connecting an unlocking pressure line, a second valve unit outlet for connecting a locking pressure line, at least one discharge to the tank, and at least two switchable directional valves, with the feed pressure connector being connected or connectable to the second valve unit outlet via a serial connection of the at least two switchable directional valves.

公开(公告)号：US09605590B2

公开(公告)日：2017-03-28

申请号：US15208755

申请日：2016-07-13

申请人： IHI Corporation

发明人： Takeshi Yamada ,  Yoshiyuki Umemoto ,  Machiko Kobayashi

IPC分类号： F02D15/02 ,  F02B75/04 ,  F02B75/32 ,  F04B19/22 ,  F15B11/08 ,  F02B25/04

CPC分类号： F02B75/045 ,  F02B25/04 ,  F02B75/047 ,  F02B75/32 ,  F02D15/02 ,  F04B19/22 ,  F15B11/08 ,  F15B2211/50554 ,  F15B2211/7051

摘要： Provided is a crosshead engine that includes: a cylinder; a piston; a piston rod; a crosshead; a connecting rod; a crankshaft; and a variable mechanism varies positions of top and bottom dead centers of the piston by changing a relative position between the piston rod and the crosshead in a stroke direction of the piston. The variable mechanism includes: a hydraulic pressure chamber which is provided in the crosshead and into which an end of the piston rod is inserted; and a hydraulic pressure adjustment mechanism which supplies hydraulic oil to the hydraulic pressure chamber or discharges the hydraulic oil from the hydraulic pressure chamber and which adjusts an entering position at which the end of the piston rod is inserted into the hydraulic pressure chamber in the stroke direction.

公开(公告)号：US20170030347A1

公开(公告)日：2017-02-02

申请号：US14812758

申请日：2015-07-29

申请人： Hamilton Sundstrand Corporation

发明人： Gary M. McBrien

IPC分类号： F04B49/24 ,  F04B23/02 ,  F16K15/00 ,  F04B53/14 ,  G05D7/06 ,  F04B19/22 ,  F04B9/123

CPC分类号： F04B49/24 ,  F02C9/263 ,  F04B9/123 ,  F04B19/22 ,  F04B23/02 ,  F04B53/14 ,  F15B1/024 ,  F15B11/072 ,  F15B2211/212 ,  F15B2211/50536 ,  F15B2211/50554 ,  F15B2211/5158 ,  F15B2211/565 ,  F15B2211/625 ,  F15B2211/6313 ,  F16K15/00 ,  G05D7/0635

摘要： A method and system providing a pressurized fluid includes a pump having a pump inlet and a pump outlet, the pump to provide a fluid flow, a bypass path to direct the fluid flow from the pump outlet to the pump inlet, a load path having a load path pressure, the load path including: a fluid accumulator to accumulate a fluid volume, and at least one load device, a bypass regulator valve in fluid communication with the pump outlet, the bypass path, and the load path, and a controller to direct the fluid flow to the load path in response to the load path pressure being less than a low load path threshold pressure via the bypass regulator valve and to direct the fluid flow to the bypass path in response to the load path pressure being greater than a high load path threshold pressure via the bypass regulator valve.

摘要翻译： 提供加压流体的方法和系统包括具有泵入口和泵出口的泵，用于提供流体流的泵，用于将流体流从泵出口引导到泵入口的旁路路径，具有 负载路径压力，所述负载路径包括：用于积蓄流体体积的流体蓄积器，以及至少一个负载装置，与所述泵出口，所述旁路路径和所述负载路径流体连通的旁路调节阀，以及控制器 响应于经由旁路调节阀小于低负载路径阈值压力的负载路径压力将流体流引导到负载路径，并且响应于负载路径压力而将流体流引导到旁路路径 通过旁路调节阀的高负载路径阈值压力。

公开(公告)号：US09546468B2

公开(公告)日：2017-01-17

申请号：US14360504

申请日：2012-12-24

申请人： DOOSAN INFRACORE CO., LTD.

发明人： Jai Seok Bang

IPC分类号： F16D31/02 ,  E02F9/22 ,  F15B13/042 ,  F15B11/16 ,  F15B11/042 ,  F15B11/17

CPC分类号： E02F9/2235 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/0423 ,  F15B11/165 ,  F15B11/167 ,  F15B11/17 ,  F15B13/0426 ,  F15B2211/20523 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/3052 ,  F15B2211/50554 ,  F15B2211/513 ,  F15B2211/526 ,  F15B2211/633 ,  F15B2211/6355 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/6655 ,  F15B2211/6658 ,  F15B2211/7142 ,  F15B2211/8606 ,  F15B2211/8613

摘要： The present disclosure relates to a hydraulic system of a construction machine. The hydraulic system of the construction machine includes: an electronic proportional pressure reducing valve configured to control a flow rate, to which a maximum pressure is input as a control current value, and which is set to a minimum flow rate; a gear pump configured to provide pilot operation oil to the EPPRV; a shuttle valve configured to compare a pressure of first pilot operation oil passing through the EPPRV and a pressure of a flow rate control signal, and output second pilot operation oil having the greater pressure; a hydraulic pump of which a swash plate angle is controlled by the second pilot operation oil; and a pump control device configured to control a pressure of the EPPRV to be decreased from a maximum pressure by a predetermined inclination when the flow rate control signal is generated.

摘要翻译： 本公开涉及施工机械的液压系统。 施工机械的液压系统包括：电子比例减压阀，其被配置为控制输入最大压力作为控制电流值的流量，并将其设定为最小流量; 齿轮泵，其构造成向EPPRV提供先导操作油; 构造成将通过所述EPPRV的第一先导操作油的压力与流量控制信号的压力进行比较，并输出具有较大压力的第二先导操作油的梭阀; 液压泵，其中斜盘角由第二先导操作油控制; 以及泵控制装置，被配置为当产生所述流量控制信号时，将所述EPPRV的压力从最大压力减小规定的倾斜度。

公开(公告)号：US20160312443A1

公开(公告)日：2016-10-27

申请号：US15103346

申请日：2014-12-02

申请人： KYB CORPORATION

发明人： Masahiro EGAWA ,  Haruhiko KAWASAKI

IPC分类号： E02F9/22 ,  F15B21/14 ,  E02F9/26 ,  E02F9/08 ,  E02F9/20

CPC分类号： E02F9/2217 ,  B60Y2200/412 ,  B60Y2300/437 ,  B60Y2300/54 ,  B60Y2300/55 ,  B60Y2400/14 ,  B60Y2400/301 ,  B60Y2400/306 ,  B60Y2400/406 ,  B60Y2400/60 ,  E02F9/0875 ,  E02F9/123 ,  E02F9/2075 ,  E02F9/2095 ,  E02F9/226 ,  E02F9/2267 ,  E02F9/2271 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/267 ,  F15B21/14 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/426 ,  F15B2211/50554 ,  F15B2211/6313 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/7135

摘要： A control system of a hybrid construction machine includes a main pump for discharging working fluid and driving an actuator, a regeneration motor driven by the working fluid discharged from the actuator through a first regeneration passage, a rotational electric machine drivable by the regeneration motor, and a regeneration passage switching valve having a tank communication position that allows the first regeneration passage to communicate with a tank when a flow-in amount of the working fluid inside the first regeneration passage into the regeneration motor exceeds a defined value.

摘要翻译： 混合式施工机械的控制系统包括：用于排出工作流体和驱动致动器的主泵，由通过第一再生通道从致动器排出的工作流体驱动的再生马达，由再生马达驱动的旋转电机;以及 再生通道切换阀具有罐连通位置，当第一再生通道内的工作流体的进入量超过限定值时，允许第一再生通道与罐连通。