公开(公告)号：US08495870B2

公开(公告)日：2013-07-30

申请号：US12724941

申请日：2010-03-16

申请人： Ryohei Sumiyoshi ,  Kazuyoshi Arii ,  Kunihiro Suzuki

发明人： Ryohei Sumiyoshi ,  Kazuyoshi Arii ,  Kunihiro Suzuki

IPC分类号： F16H61/42

CPC分类号： F16H61/433 ,  E02F9/2232 ,  E02F9/2235 ,  E02F9/2253 ,  F15B2211/20561 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/6355 ,  F15B2211/7058 ,  F16H61/4104

摘要： Disclosed is a work machine having a traveling apparatus and a work implement driven by an engine. A hydraulic system mounted on the work machine includes an HST pump comprising a swash plate, variable displacement pump driven by the engine, an HST motor connected in a closed circuit to the HST pump and a pair of speed-changing oil passageways, the HST motor being driven by an amount of oil supplied by the HST pump, thereby to drive the traveling apparatus, a main pump driven by the engine, the main pump supplying pressure oil to the work implement, a pilot pump driven by the engine, a swash plate positioning circuit configured to effect positioning of a swash plate of the HST pump with pilot oil supplied from the pilot pump, and a bleed circuit configured to drain, via a throttle, a portion of the pilot oil supplied to the swash plate positioning circuit.

摘要翻译： 公开了一种具有行驶装置和由发动机驱动的工作装置的作业机械。 安装在作业机器上的液压系统包括HST泵，其包括斜盘，由发动机驱动的可变排量泵，连接到HST泵的闭合回路中的HST马达和一对变速油通道，HST马达 由HST泵供给的油量驱动，从而驱动行驶装置，由发动机驱动的主泵，主泵向工作装置供给压力油，由发动机驱动的先导泵，斜盘 定位电路，其被配置为利用由先导泵供给的先导油来实现HST泵的斜盘的定位;以及放气回路，其经由节流阀将提供给斜盘定位电路的先导油的一部分排出。

公开(公告)号：US08347620B2

公开(公告)日：2013-01-08

申请号：US12636351

申请日：2009-12-11

申请人： Gang Yu ,  Zhongming Ye ,  Fugang Li

发明人： Gang Yu ,  Zhongming Ye ,  Fugang Li

IPC分类号： F16D31/02

CPC分类号： F16H61/4104 ,  F16H61/4043 ,  Y10T137/2567 ,  Y10T137/4259

摘要： A bypass/flushing valve for a hydrostatic system includes a valve body including a central bore, a shuttle valve located in the central bore, and a valve spindle disposed within the central bore. The valve body includes four ports each in communication with the central bore. The shuttle valve blocks flow through the central bore between a first port and a second port. When pressure at the second port is higher than at the first port, the shuttle valve moves to allow flow passage between the first port and the third port. When pressure at the first port is higher than at the second port, the shuttle valve moves to allow flow passages between the second port and a third port. The spindle is movable between a first position to block communication between the second port and the fourth port and a second position to allow for communication between the second port and the fourth port.

摘要翻译： 用于静液压系统的旁通/冲洗阀包括阀体，阀体包括中心孔，位于中心孔中的梭阀和设置在中心孔内的阀芯。 阀体包括四个与中心孔连通的端口。 梭阀块在第一端口和第二端口之间流过中心孔。 当第二端口处的压力高于第一端口处的压力时，梭阀移动以允许第一端口和第三端口之间的流动通道。 当第一端口处的压力高于第二端口处的压力时，梭阀移动以允许在第二端口和第三端口之间的流动通道。 主轴可在第一位置之间移动以阻止第二端口和第四端口之间的通信，以及允许第二端口和第四端口之间的通信的第二位置。

公开(公告)号：US08205444B2

公开(公告)日：2012-06-26

申请号：US12255350

申请日：2008-10-21

申请人： Brian D. Kuras ,  Michael G. Cronin ,  Frank Anthony DeMarco ,  Tyler Bowman

发明人： Brian D. Kuras ,  Michael G. Cronin ,  Frank Anthony DeMarco ,  Tyler Bowman

IPC分类号： F16H39/00 ,  F16H61/40

CPC分类号： F16H61/4104 ,  F16H61/4165 ,  F16H2059/144

摘要： A system and method for variator control employs positively directed electronic make-up and flushing relief valves for more precise torque control of a hydraulic variator, especially during torque reversal, as well as improved cold weather operation. This can improve machine response during periods of severe torque change. The ability to more tightly control variator torque allows more precise torque management algorithms for power control and engine matching purposes. Moreover, the ability to positively control venting of the hydraulic circuit for purposes of fluid cooling allows for more consistent machine response regardless of ambient temperature.

摘要翻译： 用于变换器控制的系统和方法使用正向电子化妆和冲洗安全阀，用于液压变速器的更精确的扭矩控制，特别是在扭矩反转期间以及改进的寒冷天气操作。 这可以在严重的扭矩变化期间改善机器响应。 更紧密地控制变矩器扭矩的能力允许更精确的扭矩管理算法用于功率控制和发动机匹配目的。 此外，为了流体冷却的目的，积极控制液压回路排气的能力允许不管环境温度如何，更一致的机器响应。

公开(公告)号：US08132588B1

公开(公告)日：2012-03-13

申请号：US12166911

申请日：2008-07-02

申请人： Thomas J. Langenfeld ,  Scott E. Windhorst

发明人： Thomas J. Langenfeld ,  Scott E. Windhorst

IPC分类号： G05D11/02

CPC分类号： F16K11/065 ,  F16H61/4104 ,  F16K11/048 ,  F16K11/105 ,  F16K17/18 ,  G05D11/02 ,  Y10T137/2521 ,  Y10T137/2564 ,  Y10T137/2567

摘要： A valve for use between a first fluid side and a second fluid side is disclosed herein. The valve comprises a pair of subassemblies, each one slidable between a closed position and an open position. Each subassembly comprises a first component comprising a first component main body, a first component first end and a first component second end opposite the first component first end. A first component first extension is formed on each first component first end, the first component first extension comprising a diameter that is less than the diameter of the first component main body. Hydraulic pressure causes one subassembly to slide to its closed position, and causes it to engage the second subassembly, sliding the second subassembly to its open position.

摘要翻译： 本文公开了在第一流体侧和第二流体侧之间使用的阀。 阀包括一对子组件，每个子组件可在关闭位置和打开位置之间滑动。 每个子组件包括第一部件，其包括第一部件主体，第一部件第一端部和与第一部件第一端部相对的第一部件第二端部。 第一部件第一延伸部形成在每个第一部件第一端上，第一部件第一延伸部包括直径小于第一部件主体的直径。 液压使一个子组件滑动至其关闭位置，并使其接合第二子组件，将第二组件滑动到其打开位置。

公开(公告)号：US07523609B2

公开(公告)日：2009-04-28

申请号：US11626783

申请日：2007-01-24

申请人： Yasuhisa Mochizuki ,  Koji Sakata ,  Kazuhiro Owada

发明人： Yasuhisa Mochizuki ,  Koji Sakata ,  Kazuhiro Owada

IPC分类号： F16D39/00

CPC分类号： F16H61/4104 ,  F16H61/4139

摘要： There is provided a hydrostatic transmission (HST) in which a hydraulic pump unit operatively driven by a driving power source and a hydraulic motor unit arranged spaced apart from the hydraulic pump unit and operatively driving a driving-wheel are fluidly connected by way of operation fluid lines so as to form a closed circuit. The hydraulic motor unit is provided with motor-side operation fluid passages forming one part of the operation fluid lines. A motor-side charge fluid passage having a first end opened to an outside to form a motor-side charge port and a second end fluidly connected to at least one of the motor-side operation fluid passages is also included. A check valve is interposed in the motor-side charge fluid passage so as to allow the fluid to flow from the motor-side charge port to one motor-side operation fluid passage while preventing reverse flow.

摘要翻译： 提供了一种液压传动（HST），其中由驱动动力源可操作地驱动的液压泵单元和与液压泵单元间隔开并且可操作地驱动驱动轮的液压马达单元通过操作流体流体连接 以形成闭路。 液压马达单元设置有形成操作流体管线的一部分的马达侧操作流体通道。 电动机侧充电流体通道，其具有向外部敞开的第一端以形成电动机侧充电端口，并且还包括流体连接到电动机侧操作流体通道中的至少一个的电动机侧充电流体通道。 止回阀插入电动机侧充电流体通道中，以便允许流体从电动机侧充电口流动到一个电动机侧操作流体通道，同时防止反向流动。

公开(公告)号：US20090101216A1

公开(公告)日：2009-04-23

申请号：US11920796

申请日：2006-08-04

申请人： Steven Donders

发明人： Steven Donders

IPC分类号： F16K21/04

CPC分类号： F15B21/042 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/20584 ,  F15B2211/611 ,  F15B2211/613 ,  F15B2211/7058 ,  F16H61/40 ,  F16H61/4104 ,  F16K11/044 ,  F16K11/0712 ,  Y10T137/7837

摘要： The invention relates to a scavenging valve for a closed hydraulic circuit. A valve piston (40) is arranged in a longitudinally displaceable manner in a clearance (36) in a valve housing (35). Said scavenging valve (21) has at least three pressure spaces (41, 42, 43) which are constructed in an axially consecutive manner. Two of said pressure spaces (41, 42, 43) can be connected to one another other at a time in dependence upon a relative position of the valve piston (40) in relation to the valve housing (35). In order to interrupt the connection between the pressure spaces (41, 42, 43), a sealing element (44, 45), which effects sealing against a valve-seat face (50) constructed in the housing, is provided in each case.

摘要翻译： 本发明涉及一种用于封闭液压回路的扫气阀。 阀活塞（40）以可纵向移位的方式布置在阀壳体（35）中的间隙（36）中。 所述扫气阀（21）具有至少三个以轴向连续方式构造的压力空间（41,42,43）。 两个所述压力空间（41,42,43）可以一次根据阀活塞（40）相对于阀壳体（35）的相对位置而彼此连接。 为了中断压力空间（41,42,43）之间的连接，在每种情况下都设置有密封元件（44,45），其对构成在壳体中的阀座面（50）进行密封。

公开(公告)号：US20090064675A1

公开(公告)日：2009-03-12

申请号：US11896957

申请日：2007-09-07

申请人： Paul Anthony Dvorak ,  Matthew Chad Full ,  Paul Alan Rousseau

发明人： Paul Anthony Dvorak ,  Matthew Chad Full ,  Paul Alan Rousseau

IPC分类号： F16D31/02

CPC分类号： F16H61/4104 ,  F16H61/4017 ,  F16H61/448

摘要： A flushing system for a transmission is disclosed. The system has a first pump and a first actuator connected to the first pump to form a first loop. The system also has a second pump and a second actuator connected to the second pump to form a second loop. The system further has a charge pump configured to replenish the first and second loops. The system also has a single charge relief valve situated to receive fluid from the first pump, the second pump, and the charge pump.

摘要翻译： 公开了一种用于变速器的冲洗系统。 该系统具有连接到第一泵的第一泵和第一致动器，以形成第一回路。 该系统还具有连接到第二泵的第二泵和第二致动器，以形成第二回路。 该系统还具有配置成补充第一和第二回路的电荷泵。 该系统还具有单个电荷释放阀，其位于用于从第一泵，第二泵和电荷泵接收流体。

公开(公告)号：US07401466B2

公开(公告)日：2008-07-22

申请号：US10592396

申请日：2006-02-02

申请人： Paul Von Baeumen ,  Dirk Hoevemeyer ,  Hans Renz

发明人： Paul Von Baeumen ,  Dirk Hoevemeyer ,  Hans Renz

IPC分类号： F16D31/02 ,  F15B13/06 ,  F15B21/02

CPC分类号： F04B9/1178 ,  F04B15/02 ,  F15B7/10 ,  F15B2211/20561 ,  F15B2211/613 ,  F15B2211/7053 ,  F15B2211/7121 ,  F16H61/4104

摘要： The invention relates to a hydraulic drive, especially for two-cylinder thick matter pumps. Said hydraulic drive comprises at least one main pump (10) embodied as a hydraulic variable displacement pump, and two hydraulically actuatable drive cylinders (20, 22) that are each connected to a connection line (16, 18) of the main pump (10) by means of pump connections mounted on one end thereof, forming a closed hydraulic circuit, and communicate with each other at the ends thereof opposing the pump connections (24, 26) by means of a swinging oil line (28). The hydraulic drive also comprises a feed pump (42), by which means pressurized oil is fed from an oil tank to the current low-pressure side into the hydraulic circuit, and a flushing branch (52), by which means a flushing oil flow is branched off from the current low-pressure side under a limited pressure into the oil tank (44). In order to avoid low-pressure influxes during the reversal process of the main pump (10), the flushing oil flow is blocked and then released in a time-delayed manner during each reversal process of the main pump (10), independently of the differential pressure in the connection lines.

摘要翻译： 本发明涉及一种液压驱动装置，尤其涉及两缸厚料泵。 所述液压驱动器包括体现为液压可变排量泵的至少一个主泵（10）和两个液压致动驱动缸（20,22），每个驱动缸连接到主泵（10）的连接管线（16,18） ），通过安装在其一端的泵连接件，形成一个闭合的液压回路，并通过摆动油管线（28）在与泵连接件（24,26）相对的端部处相互连通。 液压驱动装置还包括供给泵（42），通过该供给泵将加压油从油箱向当前低压侧供给到液压回路中，以及冲洗分支（52），通过该冲洗分支 在有限压力下从当前低压侧分支到油箱（44）中。 为了避免在主泵（10）的反转过程中的低压流入，在主泵（10）的每个反向过程期间，冲洗油流被阻断然后以时间延迟的方式释放，而与 连接线中的压差。

公开(公告)号：US20060064974A1

公开(公告)日：2006-03-30

申请号：US11237144

申请日：2005-09-28

申请人： James Whitaker ,  Xingen Dong

发明人： James Whitaker ,  Xingen Dong

IPC分类号： F16D31/02

CPC分类号： F16H61/4104 ,  F16H61/40 ,  F16H61/4043 ,  F16H61/4139

摘要： Improvement in a hydrostatic valve assembly for use in a hydrostatic transmission, for controlling fluid transfer between a first, second and third line, wherein two of the lines define first and second pressure lines within a closed loop circuit. The valve assembly comprises a valve body having ports in communication with the three lines; a spool bore and valve spool reciprocating therewithin, having first and second end portions joined by a connecting portion, and first and second bypass orifices within the valve spool; and dampers for centering the valve spool in a neutral position. The bypass orifices utilize increased cross-sectional areas that permit the passage of substantially the full flow of the charge pump, without using a charge pump relief valve, at a low pressure drop. A hydraulic system utilizing this valve assembly and a method for increasing the transmission efficiency, in the neutral mode, are also set forth.

摘要翻译： 用于静液压传动装置的静液压阀组件的改进，用于控制第一，第二和第三管线之间的流体传递，其中两条管线限定闭环回路内的第一和第二压力管线。 阀组件包括具有与三条线路连通的端口的阀体; 阀芯孔和阀芯在其中往复运动，具有通过连接部分连接的第一和第二端部，以及阀阀芯内的第一和第二旁通孔; 以及用于将阀芯定中心在中立位置的阻尼器。 旁通孔利用增加的横截面积，允许在低压降下不使用电荷泵安全阀使电荷泵的基本上全部流通。 还阐述了利用该阀组件的液压系统以及在空档模式下提高传动效率的方法。

公开(公告)号：US20040187491A1

公开(公告)日：2004-09-30

申请号：US10807602

申请日：2004-03-24

发明人： James S. Whitaker ,  Xingen Dong

IPC分类号： F16D031/02

CPC分类号： F04B1/2042 ,  F04B1/145 ,  F04B53/04 ,  F04B53/16 ,  F15B21/042 ,  F16H61/40 ,  F16H61/4104 ,  F16H61/4165

摘要： A hydraulic pump for a closed-loop hydrostatic transmission circuit having an integrated shuttle valve for diverting hot fluid from the hydrostatic transmission circuit to a reservoir. The circuit operatively interconnects the hydraulic pump and a motor and includes a first line connecting a first port within the hydraulic pump to a first port within the motor and a second line connecting a second port within the hydraulic pump to a second port within the motor.

摘要翻译： 一种用于闭环静液压传动回路的液压泵，其具有用于将热流体从静液压传动回路转移到储液器的集成梭阀。 该电路将液压泵和电动机可操作地互连，并且包括将液压泵内的第一端口连接到电动机内的第一端口的第一线路和将液压泵内的第二端口连接到电动机内的第二端口的第二线路。