公开(公告)号：US4549466A

公开(公告)日：1985-10-29

申请号：US604106

申请日：1984-04-26

申请人： Kenzo Hoashi ,  Kazuo Uehara

发明人： Kenzo Hoashi ,  Kazuo Uehara

IPC分类号： F04B1/20 ,  F04B27/06 ,  F04B1/22

CPC分类号： F04B1/2042

摘要： The known swash plate type oil hydraulic piston pump is improved in that three delivery slots each extending over an angular distance of about 60.degree. are formed in a valve plate along one circumference concentric with a rotary cylinder block at an angular interval of 60.degree. and the number of piston-cylinder units provided in the cylinder block is chosen to be a multiple of 6. Pressurized oil delivered through a center delivery slot is fed to one hydraulic actuator, and pressurized oil delivered through the delivery slots on the opposite sides of the center delivery slot is jointly fed to the other hydraulic actuator, whereby variations of flow rates of the pressurized oil fed to the respective hydraulic actuators can be minimized. Preferably, in order to feed more pressurized oil to a more heavily loaded hydraulic actuator, additional delivery slots are formed in the valve plate at the boundary portions between the three main delivery slots, and pressurized oil delivered through these additional delivery slots is fed selectively to a more heavily loaded hydraulic actuator or, if the both actuators are equally loaded, to both the hydraulic actuator through a pressure-sensitive switching valve. More preferably, a pulsation damper is connected across the hydraulic circuits for feeding the pressurized oil to the respective hydraulic actuators.

摘要翻译： 已知的旋转斜盘式油压液压活塞泵的改进在于，每个延伸大约60°的角距离的三个输送槽沿一个与旋转气缸体同心的圆周形成在阀板中，该圆周以60°的角度间隔形成， 设置在气缸体中的活塞气缸单元的数量选择为6的倍数。通过中心输送槽输送的加压油被供给到一个液压致动器，并且压力油通过中心的相对侧上的输送槽输送 输送槽共同供给到另一个液压致动器，由此可以使供给到各个液压致动器的加压油的流量的变化最小化。 优选地，为了将更多的加压油供给到更重负载的液压致动器中，在三个主输送槽之间的边界部分处在阀板中形成另外的输送槽，并且通过这些附加输送槽输送的加压油被选择性地供给到 液压致动器负载较重，或者如果两个致动器同样地装载，则通过压力敏感的切换阀对液压致动器施加。 更优选地，脉动阻尼器连接在液压回路上，用于将加压油供给到相应的液压致动器。

公开(公告)号：US4306488A

公开(公告)日：1981-12-22

申请号：US104753

申请日：1979-12-18

申请人： Kazuo Uehara

发明人： Kazuo Uehara

IPC分类号： F15B11/05 ,  B62D5/06 ,  B62D5/07 ,  B62D5/32 ,  F15B11/16 ,  F15B13/06 ,  F15B13/09

CPC分类号： B62D5/32 ,  B62D5/061 ,  B62D5/07 ,  Y10T137/87185

摘要： A pressure-compensated directional control valve assembly suitable for use in hydraulic power steering systems of off-highway working vehicles. The valve assembly integrally comprises a control valve for controlling communication between two engine-driven pumps and a steering cylinder, and a pressure compensator valve for controlling the fluid pressure delivered from the pumps to the control valve. Constantly comparing its outgoing fluid pressure with the fluid pressure at control ports of the control valve, the pressure compensator valve delivers to the control valve the pressurized fluid from one or both of the pumps. Any excess of the pressurized fluid is directed from the pressure compensator valve to, for example, an implement hoist cylinder of the work vehicle.

摘要翻译： 适用于非公路工作车辆的液压动力转向系统的压力补偿方向控制阀组件。 阀组件一体地包括用于控制两个发动机驱动泵和转向缸之间的连通的控制阀和用于控制从泵输送到控制阀的流体压力的压力补偿阀。 不断比较其输出流体压力与控制阀控制端口处的流体压力，压力补偿阀将一个或两个泵的加压流体输送到控制阀。 任何过量的加压流体从压力补偿阀引导到例如工作车辆的工具提升缸。

公开(公告)号：US4248574A

公开(公告)日：1981-02-03

申请号：US78030

申请日：1979-09-24

申请人： Kazuo Uehara ,  Hideaki Tohma ,  Yoshito Sato

发明人： Kazuo Uehara ,  Hideaki Tohma ,  Yoshito Sato

IPC分类号： F04B49/00

CPC分类号： F04B49/007 ,  F04B49/002

摘要： A hydraulic control system for variable displacement pumps, comprising at least two variable displacement pumps, a prime mover for driving the variable displacement pumps, a fixed displacement pilot pump driven by the common prime mover, a pressure compensating valve comprising a two-stage proportional pressure reducing valve and a negative proportional pressure reducing valve, the pressure compensating valve being connected to the variable displacement pumps and the fixed displacement pilot pump, and at least two servo boosters each being mechanically connected to the respective variable displacement pumps for controlling the displacement therefrom, the servo boosters being connected to the fixed displacement pilot pump and the pressure compensating valve and controlled thereby.

摘要翻译： 一种用于可变排量泵的液压控制系统，包括至少两个可变排量泵，用于驱动可变排量泵的原动机，由共同原动机驱动的固定排量先导泵，包括两级比例压力的压力补偿阀 减压阀和负比例减压阀，压力补偿阀连接到可变排量泵和固定排量先导泵，并且至少两个伺服增压器机械地连接到各个可变排量泵，以控制其位移， 伺服增压器连接到固定排量先导泵和压力补偿阀并由此控制。

公开(公告)号：US5877577A

公开(公告)日：1999-03-02

申请号：US913031

申请日：1997-09-05

申请人： Naoki Ishizaki ,  Kazuo Uehara ,  Hiromasa Yamaguchi

发明人： Naoki Ishizaki ,  Kazuo Uehara ,  Hiromasa Yamaguchi

IPC分类号： F04B9/00 ,  F04B49/00 ,  H02K7/00 ,  H02K7/14 ,  H02K9/19

CPC分类号： H02K9/19 ,  F04B49/002 ,  H02K7/00 ,  H02K7/14 ,  F04B2201/0402 ,  F04B2203/0201 ,  F04B2203/0202 ,  F04B2203/1201

摘要： The present invention is an electric hydraulic hybrid motor, a control device, and a control method for the same motor, which is small in size and simple in construction, which can be equal horsepower controlled or torque limiter controlled when required. To this end, an electric hybrid motor includes a cylinder block (21), provided for common use by a hydraulic pump (20) and by a hydraulic motor (50) and rotated integrally with a rotor (14); a number of plungers (23), provided for the hydraulic pump (20) and rotated integrally with the rotor (14); a number of plungers (23a), provided for the hydraulic motor (50); a variable swash plate control device (33), for setting the discharge rate from the hydraulic pump (20); a swash plate setting device (56), for setting the discharge rate from the hydraulic motor (50); and a case (11) in which these constituent members are disposed.

摘要翻译： PCT No.PCT / JP96 / 00525 Sec。 371日期：1997年9月5日 102（e）日期1997年9月5日PCT提交1996年3月5日PCT公布。 WO96 / 27938 PCT公开号 日期1996年9月12日本发明是一种电动液压混合电动机，控制装置和同一电动机的控制方法，其尺寸小，结构简单，可以在需要时控制等马力控制或扭矩限制器 。 为此，电动混合动力电动机包括：液压泵（20）和液压马达（50）共同使用并与转子（14）整体旋转的气缸体（21）。 多个柱塞（23），用于液压泵（20）并与转子（14）一体旋转; 为液压马达（50）提供的多个柱塞（23a）; 用于设定来自液压泵（20）的排出速度的可变斜盘控制装置（33）。 用于设定来自液压马达（50）的排出速度的斜盘调整装置（56）。 以及配置有这些构成部件的壳体（11）。

公开(公告)号：US5255705A

公开(公告)日：1993-10-26

申请号：US210245

申请日：1988-06-24

申请人： Kazuo Uehara ,  Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Masayuki Tanaami

发明人： Kazuo Uehara ,  Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Masayuki Tanaami

IPC分类号： F15B11/08 ,  F15B13/04 ,  F15B13/042 ,  F16K31/383 ,  G05D7/01

CPC分类号： F15B13/0405 ,  F15B11/08 ,  F15B13/0422 ,  F15B2211/405 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/40576 ,  F15B2211/41572 ,  F15B2211/42 ,  F15B2211/428 ,  F15B2211/6355 ,  F15B2211/67 ,  Y10T137/7764

摘要： A pressure control system in which a pressure in a back pressure chamber of a flow control valve is controlled according to a throttle opening of a pilot valve to locate stationary the valve body of the flow control valve at a position corresponding to the throttle opening of the pilot valve. In the system, a fixed throttle is provided in an oil passage extended to the back pressure chamber of the flow control valve, thereby applying a dampering action to the valve body.

公开(公告)号：US5253672A

公开(公告)日：1993-10-19

申请号：US336570

申请日：1989-04-11

申请人： Kazuo Uehara ,  Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Masayuki Tanaami

发明人： Kazuo Uehara ,  Tadao Karakama ,  Sadao Nunotani ,  Naoki Ishizaki ,  Masayuki Tanaami

IPC分类号： F15B11/08 ,  F15B13/04 ,  F15B13/042 ,  F16K31/383 ,  G05D7/01

CPC分类号： F15B13/0405 ,  F15B11/08 ,  F15B13/0422 ,  F15B2211/405 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/40576 ,  F15B2211/41572 ,  F15B2211/42 ,  F15B2211/428 ,  F15B2211/6355 ,  F15B2211/67 ,  Y10T137/7764

摘要： A pressure control system in which a pressure in a back pressure chamber of a flow control valve is controlled according to a throttle opening of a pilot valve to locate stationary the valve body of the flow control valve at a position corresponding to the throttle opening of the pilot valve. In the system, a fixed throttle is provided in an oil passage extended to the back pressure chamber of the flow control valve, thereby applying a dampering action to the valve body.

摘要翻译： 一种压力控制系统，其中根据先导阀的节气门开度来控制流量控制阀的背压室中的压力，以将流量控制阀的阀体定位在与所述流量控制阀的节气门开度相对应的位置 先导阀。 在该系统中，在通向流量控制阀的背压室的油路中设置有固定的节气门，从而对阀体施加阻尼作用。

公开(公告)号：US4473090A

公开(公告)日：1984-09-25

申请号：US310423

申请日：1981-10-09

申请人： Kazuo Uehara ,  Kiyoshi Shirai

发明人： Kazuo Uehara ,  Kiyoshi Shirai

IPC分类号： E02F9/22 ,  E02F3/84 ,  E02F3/85 ,  F15B11/17 ,  F15B11/16 ,  F15B13/06

CPC分类号： E02F3/844 ,  Y10T137/2572

摘要： All but the circle drive motor of the implement actuators of a motor grader are divided into two groups each consisting of those which need not be operated simultaneously. The power system has three fixed displacement pumps for driving the circle drive motor via a circle control valve and the two implement actuator groups via respective implement control valve arrangements of carry-over parallel configurations. One of the pumps is connected to the two implement control valve arrangements via a restriction and a flow divider. A first demand valve controls communication between the other two pumps and the implement control valve arrangements in response to the pressure differential across the restriction, maintaining constant fluid flow to the valve arrangements regardless of engine speed or the loads on the implement actuators. A second demand valve likewise responds to a pressure differential across another restriction formed in a conduit communicating the first demand valve and the carry-over ports of the implement control valve arrangements with the circle control valve, maintaining constant fluid flow thereto.

摘要翻译： 除了平行机的工具执行机构的圆周驱动马达之外，所有的驱动马达都分成两组，每组由不需要同时操作的那些组成。 电力系统具有三个固定排量的泵，用于通过循环控制阀驱动圆形驱动电动机，并通过相应的工具控制阀结构进行结转并联配置。 其中一个泵通过限制和分流器连接到两个工具控制阀装置。 第一需求阀控制响应跨过限制的压差的其它两个泵和工具控制阀装置之间的连通，保持恒定的流体流动到阀装置，而不管发动机速度或工具致动器上的负载如何。 第二需求阀同样响应于在与第一需求阀和工具控制阀装置的搬运端口连通的导管中形成的另一个限制器上的压力差与圆形控制阀相通，保持恒定的流体流动。

公开(公告)号：US4248573A

公开(公告)日：1981-02-03

申请号：US78029

申请日：1979-09-24

申请人： Kazuo Uehara ,  Hideaki Tohma ,  Yoshito Sato

发明人： Kazuo Uehara ,  Hideaki Tohma ,  Yoshito Sato

IPC分类号： F04B49/00

CPC分类号： F04B49/002 ,  F04B49/007

摘要： A hydraulic control system for a variable displacement pump, comprising a prime mover for driving the variable displacement pump, a fixed displacement pilot pump driven by the common prime mover, a pressure compensating valve connected to the pilot pump and the variable displacement pump, a cut-off control valve connected to the pressure compensating valve and the variable displacement pump, and a servo booster connected to the cut-off control valve and the pilot pump for controlling the displacement of the variable displacement pump.

摘要翻译： 一种用于可变排量泵的液压控制系统，包括用于驱动可变排量泵的原动机，由共同原动机驱动的固定排量先导泵，连接到先导泵和可变排量泵的压力补偿阀， 连接到压力补偿阀和可变排量泵的断开控制阀，以及连接到截止控制阀和先导泵的伺服增压器，用于控制可变排量泵的排量。

公开(公告)号：US4245962A

公开(公告)日：1981-01-20

申请号：US52099

申请日：1979-06-26

申请人： Kazuo Uehara ,  Hideaki Toma ,  Yoshito Sato

发明人： Kazuo Uehara ,  Hideaki Toma ,  Yoshito Sato

IPC分类号： F16K11/07 ,  F04B49/00 ,  F04B49/08

CPC分类号： F04B49/002 ,  F04B49/08 ,  F04B2201/1204

摘要： A displacement control system for a variable displacement pump comprising a charge pump; a cut-off control valve connected to the charge pump, the cut-off control valve including a valve body having a first and a second pump ports and an outlet port formed therein, the first pump port being connected to the charge pump and the second pump port being connected to the variable displacement pump, a sleeve mounted within the valve body, a pin slidably mounted within the sleeve, a spool slidably mounted within the sleeve, a cylindrical cap member fixedly secured to the valve body defining a spring chamber therein, and a spring disposed within the spring chamber for urging the spool toward connecting the first pump port with the outlet port; and a servo booster connected to the outlet port for controlling the displacement of the variable displacement pump.

摘要翻译： 一种用于包括电荷泵的可变排量泵的排量控制系统; 连接到所述电荷泵的截止控制阀，所述截止控制阀包括具有形成在其中的第一和第二泵口和出口的阀体，所述第一泵口连接到所述电荷泵，所述第二泵口连接到所述电荷泵， 泵端口连接到可变排量泵，安装在阀体内的套筒，可滑动地安装在套筒内的销，可滑动地安装在套筒内的柱塞，固定地固定到阀体上的圆柱形盖件，在其中限定弹簧室， 以及弹簧，其设置在所述弹簧室内，用于推压所述线轴以将所述第一泵口与所述出口连接; 以及连接到出口的伺服增压器，用于控制可变排量泵的排量。

公开(公告)号：US4152896A

公开(公告)日：1979-05-08

申请号：US892306

申请日：1978-03-31

申请人： Hideaki Tohma ,  Kazuo Uehara

发明人： Hideaki Tohma ,  Kazuo Uehara

IPC分类号： F04B49/00 ,  F16H39/46

CPC分类号： F04B49/002

摘要： A control system for a variable displacement pump which powers a load actuator via a selector valve and which has its displacement varied by a pump actuator of the single-acting type. The system includes a load-sensing control valve for selectively communicating the pump actuator with a pressurized fluid source or with a fluid drain in accordance with a differential between the sum of the pump output pressure and the pump actuator pressure and the sum of the load actuator pressure and the force of a spring. Also included is a normally open, cutoff control valve, connected serially with the load-sensing control valve, for placing the pump actuator in communication with a fluid drain in response to the sum of the pump output pressure and pump actuator pressure acting against the force of a spring.

摘要翻译： 一种用于可变排量泵的控制系统，其通过选择阀为负载致动器供电，并且其排量由单作用型泵致动器变化。 该系统包括负载感测控制阀，用于根据泵输出压力和泵致动器压力的总和与负载致动器的总和之间的差异来选择性地将泵致动器与加压流体源或流体排放器连通 压力和弹簧的力。 还包括一个常开的截止阀，与负载传感控制阀串联连接，用于响应于泵输出压力和泵致动器压力的作用力而反作用力将泵致动器与流体排放管连通 的春天