Pressure compensation valve
    31.
    发明授权
    Pressure compensation valve 失效
    压力补偿阀

    公开(公告)号:US5730182A

    公开(公告)日:1998-03-24

    申请号:US776677

    申请日:1997-02-04

    摘要: A pressure compensation valve is constructed with a valve establishing and blocking a communication between an inlet port and an outlet port, a pressure receiving chamber, a piston driven by a load pressure within the pressure receiving chamber and shifting the valve in blocking direction, an intermediate pressure receiving chamber communicated with the inlet port via a first conduit and pushing the valve in blocking direction by the pressure therein, and a pressure variable relief valve for relieving a pressurized fluid in the intermediate pressure chamber to the outlet port via a second conduit.

    摘要翻译: PCT No.PCT / JP95 / 01546 Sec。 371日期1997年2月4日 102(e)日期1997年2月4日PCT提交1995年8月3日PCT公布。 公开号WO96 / 04482 日期1996年2月15日压力补偿阀构造有一个阀门,建立和阻止入口和出口之间的连通,压力接收室,由受压室内的负载压力驱动的活塞,并将阀门 中间压力接收室,其经由第一导管与入口端口连通,并通过其中的压力推动阀阻挡方向;以及压力可变安全阀,用于将中压室中的加压流体经由 第二个管道。

    Hydraulic circuit for operating plural actuators and its pressure
compensating valve and maximum load pressure detector
    32.
    发明授权
    Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector 失效
    用于操作多个执行器的液压回路及其压力补偿阀和最大负载压力检测器

    公开(公告)号:US5481872A

    公开(公告)日:1996-01-09

    申请号:US244439

    申请日:1994-09-23

    摘要: Simultaneous operation efficiency in a case where a plurality of actuators are operated by one or a plurality of hydraulic pumps is improved. A delivery pressure passage (1a) of one hydraulic pump (1) and that (1a) of the other hydraulic pump (1) communicate with each other through a first short-circuit passage (39) via a pair of check valves (38, 38), and an unload valve (40) is provided in this first short-circuit passage (39). The load pressure introduction passages (6, 6) on the left and right hydraulic pumps (1, 1) communicate with each other through a second short-circuit passage (36) via a pair of check valves (35, 35), and a relief valve (37) is provided in this short-circuit passage (36). The unload valve (40) is unloaded by the differential pressure between the pump delivery pressure in the first short-circuit passage (39) and the load pressure in the second short-circuit passage (36), whereby a single relief valve (37) carries out a relieving operation both at the time of flow merging and at the time of flow branching to equalize the maximum pump delivery pressures. The set pressure of the relief valve (37) can be a high level so as to relieve the valve (37) under a predetermined high load pressure, whereby the relieving operation can be arbitrarily controlled.

    摘要翻译: PCT No.PCT / JP92 / 01540 Sec。 371日期1994年9月23日 102(e)1994年9月23日PCT PCT日期:1992年11月25日PCT公布。 公开号WO93 / 11364 日期:1993年6月10日。在多个致动器由一个或多个液压泵操作的情况下的同时操作效率提高。 一个液压泵(1)的输送压力通道(1a)和另一个液压泵(1)的(1a)通过第一短路通道(39)经由一对止回阀(38, 38),在该第一短路通路(39)上设置有卸载阀(40)。 通过一对止回阀(35,35),通过第二短路通路(36)将左右液压泵(1,1)的负荷压力引入通路(6,6)相互连通, 在该短路通路(36)上设有安全阀(37)。 卸载阀(40)通过第一短路通道(39)中的泵输送压力和第二短路通道(36)中的负载压力之间的压差来卸载,由此单个安全阀(37) 在流动合并时和流动分支时均执行减压操作以均衡最大泵输送压力。 安全阀(37)的设定压力可以是高水平,以便在预定的高负载压力下释放阀(37),从而可以任意地控制卸载操作。

    Control valve system
    33.
    发明授权
    Control valve system 失效
    控制阀系统

    公开(公告)号:US5046400A

    公开(公告)日:1991-09-10

    申请号:US425176

    申请日:1989-10-17

    摘要: In a control valve system provided with a plurality of valves for controlling a hydraulic equipment such as hydraulic cylinders, there are employed a plurality of valves each of which does not interfere with each other in operation and requires a minimum mounting space in the system to enable the system to be a small-sized system having a construction easily adapted to control a plurality of hydraulic equipments. The control valve system comprises: a valve (10) assuming a rectangular parallelepiped form; a first (11) and a second (12) pump port passage formed in an upper portion of a valve housing of the valve (10) so as to be parallel to each other; a tank port passage (13) formed in a lower central portion of the valve housing; a first (14) and a second (15) port passage vertically formed in the valve housing so as to separately open into an upper surface of the valve housing to communicate with each of pressure chambers of the hydraulic equipment; and a plurality of valves (19, 20, 23, 24) inserted into a plurality of valve receiving bores formed in the valve housing so as to shut off desired ones of these port passages from the remaining port passages.

    SPEED-CHANGING DEVICE
    34.
    发明申请
    SPEED-CHANGING DEVICE 有权
    变速装置

    公开(公告)号:US20080108467A1

    公开(公告)日:2008-05-08

    申请号:US11961918

    申请日:2007-12-20

    IPC分类号: F16H47/04

    摘要: A transmission is provided which has a very compact system configuration and is capable of exerting high energy efficiency over all speed regions from a low speed region to a high speed region, while providing improved operability free from a torque shortage. To this end, the transmission has an input shaft, an intermediate output shaft, a planetary gear mechanism, a first pump-motor, and a second pump-motor connected to the first pump-motor, the input shaft being coupled to a first element of the planetary gear mechanism, the second pump-motor being coupled to a second element of the planetary gear mechanism, the intermediate output shaft being coupled to a third element of the planetary gear mechanism, and the transmission further comprising a switching mechanism for selectively coupling the first pump-motor to either the input shaft or the intermediate output shaft.

    摘要翻译: 提供了一种具有非常紧凑的系统配置并且能够在从低速区域到高速区域的所有速度区域施加高能量效率的传输,同时提供了没有扭矩不足的改进的可操作性。 为此,变速器具有输入轴,中间输出轴,行星齿轮机构,第一泵电动机和连接到第一泵电动机的第二泵电动机,输入轴与第一元件 所述第二泵电动机联接到所述行星齿轮机构的第二元件,所述中间输出轴联接到所述行星齿轮机构的第三元件,并且所述变速器还包括用于选择性地联接的切换机构 第一个泵马达到输入轴或中间输出轴。

    Operating lever device
    35.
    发明授权
    Operating lever device 失效
    操作杆装置

    公开(公告)号:US06328127B1

    公开(公告)日:2001-12-11

    申请号:US09561987

    申请日:2000-05-02

    IPC分类号: B60K2600

    摘要: A vehicle advances forward while turning to the right when an operating lever is tilted forward and to the right, that is, being operated in a direction intermediate between the forward direction and right-hand direction. Only an output signal of the component corresponding to the forward direction is preserved when the operating lever is released. The component corresponding to the right-hand direction returns to the neutral position, and the signal output is brought to zero. The vehicle therefore moves only forward. The operating position can thus be preserved and a signal output state can be held for a single directional component selected from longitudinal and transverse direction components when operating the operating lever device which is tilted along the directional components in both longitudinal and transverse directions.

    摘要翻译: 当操作杆向前和向右倾斜时,即在向前方向和右手方向之间的方向上操作时,车辆向右转。 当操作杆被释放时,仅保持与前进方向对应的部件的输出信号。 对应于右方向的部件返回到中立位置,信号输出为零。 因此,车辆只能前进。 因此,当操作沿纵向和横向方向上的方向分量倾斜的操作杆装置时,可以保持操作位置并且可以保持从纵向和横向分量中选择的单个方向分量的信号输出状态。

    Hydraulically actuated breaker with lost-motion prevention device
    36.
    发明授权
    Hydraulically actuated breaker with lost-motion prevention device 失效
    具有防失动装置的液压致动器

    公开(公告)号:US6152013A

    公开(公告)日:2000-11-28

    申请号:US194946

    申请日:1998-12-07

    CPC分类号: B25D9/16

    摘要: A hydraulically actuated breaker with a lost-motion preventing device includes a cylinder portion (26) defining a first chamber (23) constantly communicated with a hydraulic pressure source (47) and having a small pressure receiving area for upwardly moving a piston (22) and a second chamber (24) having a large pressure receiving area for downwardly moving the piston, by inserting the piston into a piston bore (21) of a breaker main body (20); a chisel (28) inserted within a chisel insertion hole (27) of the breaker main body in opposition to the piston; a main switching valve (40) being switched between a first position (E) communicating the second chamber with a tank (48) and a second position (F) communicating the second chamber with the hydraulic pressure source; and a valve mechanism (30) placing the main switching valve at the first position when the piston is in an effective lower stroke end position, placing the main switching valve at the second position when the piston is in an effective upper stroke end position, and maintaining the main switching valve at the second position when the piston is lowered beyond the effective lower stroke end position.

    摘要翻译: PCT No.PCT / JP97 / 02577 Sec。 371 1998年12月7日第 102(e)日期1998年12月7日PCT 1997年7月24日PCT公布。 公开号WO98 / 04387 日本1998年2月5日具有防漏运动装置的液压致动断路器包括限定与液压源(47)恒定连通的第一腔室(23)的气缸部分(26),并且具有小的压力接收区域用于向上移动 通过将活塞插入到断路器主体(20)的活塞孔(21)中,具有用于向下移动活塞的大的压力接收区域的活塞(22)和第二室(24)。 插入在与所述活塞相对的所述断路器本体的凿子插入孔(27)内的凿子(28) 主切换阀(40)在连通第二腔室的第一位置(E)与罐(48)之间切换,以及将第二腔室与液压源连通的第二位置(F); 以及阀机构(30),当所述活塞处于有效的下行程末端位置时,将所述主切换阀置于所述第一位置,当所述活塞处于有效的上冲程终点位置时,将所述主切换阀置于所述第二位置,以及 当活塞下降超过有效下冲程终点位置时,将主切换阀保持在第二位置。

    Travelling control circuit for a hydraulically driven type of travelling
apparatus
    37.
    发明授权
    Travelling control circuit for a hydraulically driven type of travelling apparatus 失效
    一种液压驱动型行走装置的行驶控制回路

    公开(公告)号:US5857330A

    公开(公告)日:1999-01-12

    申请号:US765259

    申请日:1996-12-20

    摘要: A travelling control circuit for a hydraulically driven type of travelling apparatus is provided. The circuit has a hydraulic pump, left and right hand side directional control valves provided parallel to each other in a discharge path of the hydraulic pump, a left hand side first and second circuit and a right hand side first and second circuit. Furthermore, the output sides of the left hand side and right hand side directional control valves are connected with a left and right hand side travelling purpose hydraulic motor, respectively. In addition, a pressure compensating valve is provided with each of the first and second circuits to control the opening between an inlet port and an outlet port in response to a difference in pressure between a self load pressure and a maximum load pressure of the load pressures of the left and right hand side travelling purpose hydraulic motors, thereby compensating a pressure in the fluid. When the pressurized fluid is compensated, the pressure compensating valves establish communication between the left hand side and the right hand first circuits and between the left hand side and the right hand side second circuits. When communication between the inlet port an the outlet port is blocked or substantially blocked, the pressure compensating valves block communication between the left hand side and the right hand side first circuits and communication between the left hand side and the right hand side second circuits, respectively.

    摘要翻译: PCT No.PCT / JP95 / 01227 Sec。 371日期1996年12月20日第 102(e)日期1996年12月20日PCT提交1995年6月20日PCT公布。 出版物WO95 / 35220 日期1995年12月28日提供了一种用于液压驱动型行进装置的行驶控制回路。 电路具有液压泵,在液压泵的排出路径中彼此平行设置的左右侧方向控制阀,左侧第一和第二回路以及右手侧第一和第二回路。 此外,左侧和右侧方向控制阀的输出侧分别与左右侧行驶用液压马达连接。 此外,压力补偿阀设置有第一和第二回路中的每一个,以响应于自负载压力和负载压力的最大负载压力之间的压力差来控制入口端口和出口之间的开口 的左右侧行驶用液压马达,从而补偿流体中的压力。 当加压流体被补偿时,压力补偿阀建立左手侧和右手第一回路之间以及左手侧和右手侧第二回路之间的连通。 当入口端口与出口端口之间的连通被阻塞或基本阻塞时,压力补偿阀分别阻止左手侧和右手侧第一回路之间的通信以及左手侧和右手侧第二回路之间的连通 。

    Directional control valve unit
    38.
    发明授权
    Directional control valve unit 失效
    定向控制阀单元

    公开(公告)号:US5832808A

    公开(公告)日:1998-11-10

    申请号:US776675

    申请日:1997-02-04

    摘要: A directional control valve unit includes a first actuator port connected to a raising side chamber of a working machine cylinder. In addition, a second actuator port is connected to a lowering side chamber of the working machine cylinder. A regeneration passage makes the second actuator port communicate with a regeneration port through a check valve. A main spool is adapted to supply a pressure oil to the second actuator port and to make the first actuator port communicate with a tank port and the regeneration port by moving the main spool in one direction. The directional control valve unit also includes a switching device for switching the maximum moving distance of the main spool in the one direction in a plurality of stages.

    摘要翻译: PCT No.PCT / JP95 / 01547 Sec。 371日期1997年2月4日 102(e)日期1997年2月4日PCT提交1995年8月3日PCT公布。 公开号WO96 / 04481 日期1996年2月15日方向控制阀单元包括连接到工作机气缸的升高侧室的第一致动器端口。 此外,第二致动器端口连接到作业机筒的下降侧室。 再生通道使得第二致动器端口通过止回阀与再生端口连通。 主阀芯适于向第二致动器端口提供压力油,并且通过沿一个方向移动主阀芯来使第一致动器端口与罐口和再生端口连通。 方向控制阀单元还包括用于在多个级中沿一个方向切换主阀芯的最大移动距离的开关装置。

    Pressure compensation valve
    39.
    发明授权
    Pressure compensation valve 失效
    压力补偿阀

    公开(公告)号:US5738134A

    公开(公告)日:1998-04-14

    申请号:US765193

    申请日:1997-01-03

    摘要: A pressure compensation valve has a check valve portion with a check valve bore with an inlet port and an outlet port in a valve body, a valve in the check valve bore for establishing and blocking communication between the inlet port and the outlet port, a pressure reduction valve portion constructed by forming a pressure reducing valve bore having a first port, a second port and a third port and being coaxial with the check valve bore in the valve body, a spring-biased spool in the pressure reduction valve bore to define a first pressure chamber communicating with the first port and a second pressure chamber communicating with the third port at both sides, making the second port communicate with the third port by a pressure of the first pressure chamber, and blocking communication between the second port and the third port by the pressure in the second pressure chamber.

    摘要翻译: PCT No.PCT / JP95 / 01378 Sec。 371日期1997年1月3日 102(e)日期1997年1月3日PCT提交1995年7月11日PCT公布。 公开号WO96 / 01952 日期1996年1月25日压力补偿阀具有止回阀部分,止回阀孔具有阀体中的入口和出口,止回阀孔中的阀门用于建立和阻止入口和入口之间的连通 出口端口,通过形成具有第一端口,第二端口和第三端口并与阀体中的止回阀孔同轴的减压阀孔构成的减压阀部分,减压阀中的弹簧偏压阀芯 阀孔以限定与第一端口连通的第一压力室和在两侧与第三端口连通的第二压力室,使得第二端口通过第一压力室的压力与第三端口连通,并阻止第二压力室 第二端口和第三端口通过第二压力室中的压力。

    Operating valve assembly with pressure compensation valve
    40.
    发明授权
    Operating valve assembly with pressure compensation valve 失效
    带压力补偿阀的操作阀组件

    公开(公告)号:US5613519A

    公开(公告)日:1997-03-25

    申请号:US446839

    申请日:1995-06-01

    申请人: Naoki Ishizaki

    发明人: Naoki Ishizaki

    摘要: An operating valve assembly with a pressure compensation valve, comprises a spool for selectively establishing and blocking communication between a pump port, an output port and a main tank port, being disposed within a spool bore of a valve body, and a pressure compensation valve being provided between the output port and the actuator port. The pressure compensation valve has a piston pressed in the closing side by a load pressure acting on a compensation pressure acting portion, and a valve provided integrally with the piston for selectively establishing and blocking communication between the output port and the actuator port, and actuated for opening by the output port pressure acting on a portion to be compensated, the compensation acting area being equal to the area to be compensated. A pilot valve for selectively establishing and blocking communication of a pressure receiving portion of the piston of the pressure compensation valve with a tank, and a shuttle valve supplying the pressure of higher pressure side among the load pressure and the actuator port pressure to a compensation pressure acting portion of the pressure compensation valve, are provided.

    摘要翻译: PCT No.PCT / JP93 / 01861 Sec。 371日期:1995年6月1日 102(e)1995年6月1日PCT 1993年12月22日PCT PCT。 第WO94 / 15103号公报 日期1994年7月7日具有压力补偿阀的操作阀组件包括一个用于选择性地建立和阻断泵口,输出端口和主罐端口之间的连通的阀芯,该阀口设置在阀体的阀芯孔内,以及 压力补偿阀设置在输出端口和致动器端口之间。 压力补偿阀具有通过作用在补偿压力作用部分上的负载压力而在关闭侧被按压的活塞,以及与活塞一体设置的阀,用于选择性地建立和阻断输出端口和致动器端口之间的连通, 通过作用在待补偿部分上的输出端口压力打开,补偿作用面积等于要补偿的区域。 用于选择性地建立和阻止压力补偿阀的活塞的压力接收部分与罐的连通的先导阀和将负载压力和致动器端口压力中的较高压力侧的压力提供给补偿压力的往复阀 提供了压力补偿阀的作用部分。