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：US4022023A

公开(公告)日：1977-05-10

申请号：US638070

申请日：1975-12-05

申请人： Nobuaki Inaba ,  Kenzo Hoashi

发明人： Nobuaki Inaba ,  Kenzo Hoashi

IPC分类号： F04B49/00 ,  F04B49/08 ,  F16H39/46

CPC分类号： F04B49/08 ,  F04B49/002

摘要： A hydraulic circuit for controlling actuators in a construction vehicle which comprises an engine, a fixed displacement pump driven by said engine, a variable displacement pump driven by said engine, a controlling cylinder connected to the variable displacement pump for controlling the displacement thereof, an orifice provided between the output of the fixed displacement pump and a tank and, an unloading valve connected to the fixed displacement pump and also to the variable displacement pump via a pilot line for selectively unloading an output fluid from the fixed displacement pump when it is open.

摘要翻译： 一种用于控制建筑车辆中的致动器的液压回路，包括发动机，由所述发动机驱动的固定排量的泵，由所述发动机驱动的可变排量泵，连接到所述可变排量泵的控制缸，用于控制其移动， 设置在固定排量泵的输出和罐之间，以及连接到固定排量泵的卸载阀，以及经由先导管路连接到可变排量泵，用于当打开时从固定排量泵选择性地卸载输出流体。

公开(公告)号：US4583371A

公开(公告)日：1986-04-22

申请号：US713096

申请日：1985-03-18

申请人： Kenzo Hoashi ,  Koichi Morita ,  Kazuo Matsuda

发明人： Kenzo Hoashi ,  Koichi Morita ,  Kazuo Matsuda

IPC分类号： F16H61/40 ,  F16H61/4104 ,  F16H61/456 ,  F15B11/22

CPC分类号： F16H61/456 ,  F16H61/40 ,  F16H61/4104

摘要： A hydrostatic drive arrangement for a vehicle providing synchronized rotation of a pair of output drive shafts including a pair of transmissions each having a closed loop hydraulic circuit hydraulically interconnecting a variable displacement pump and a hydraulic motor, and a pressure responsive hydraulic synchronizing valve disposed between the hydraulic circuits and normally open to permit interflow of fluid between the hydraulic circuits with the valve being responsive to fluid pressure in one of the hydraulic circuits to restrict flow therethrough when the fluid pressure in the one hydraulic circuit exceeds a predetermined value.

摘要翻译： 一种用于车辆的静液压驱动装置，其提供一对输出驱动轴的同步旋转，所述输出驱动轴包括一对变速器，每对变速器具有液压互连可变排量泵和液压马达的闭环液压回路，以及设置在 液压回路并且通常打开以允许液压回路之间的流体相互交流，其中阀响应于其中一个液压回路中的流体压力，以在一个液压回路中的流体压力超过预定值时限制流过其中。

公开(公告)号：US4395878A

公开(公告)日：1983-08-02

申请号：US144165

申请日：1980-04-25

申请人： Koichi Morita ,  Kenzo Hoashi

发明人： Koichi Morita ,  Kenzo Hoashi

IPC分类号： B62D11/04 ,  B60K17/10 ,  B62D11/18 ,  F16H61/4192 ,  F16H61/44 ,  F16H61/46 ,  F16H61/478 ,  F16H39/46

CPC分类号： F16H61/42 ,  B60W10/04 ,  B60W10/103 ,  B60W30/18 ,  B62D11/183 ,  F16H61/433

摘要： A control system for a hydraulically driven vehicle having a pair of closed loop each including a variable displacement hydraulic pump driven by an engine and a variable displacement hydraulic motor, the control system comprising a charge pump driven by the engine, a directional control valve for speed control and forward and reverse change-over of the vehicle connected with the charge pump, a pair of steering valves connected with the directional control valve, a pair of servo controls each operatively connected with the respective variable displacement hydraulic pumps for controlling the displacement volume thereof, another charge pump driven by the engine, and a manually operated selector valve connected with the another charge pump and the servo controls, the selector valve having formed therein a throttling position and a communication position and normally held in the throttling position and being interlocked with the operation of the steering valves, whereby the selector valve is changed-over to its communication position when either one of the steering valves is manually operated.

摘要翻译： 一种用于液压驱动车辆的控制系统，具有一对闭环，每个闭合回路包括由发动机驱动的可变排量液压泵和可变排量液压马达，所述控制系统包括由发动机驱动的电荷泵，用于速度的方向控制阀 与电荷泵连接的车辆的控制和正向和反向切换，与方向控制阀连接的一对转向阀，一对伺服控制器，每个伺服控制器与各个可变排量液压泵操作连接，用于控制其位移体积 ，由发动机驱动的另一个电荷泵，以及与另一个电荷泵和伺服控制器连接的手动操作的选择阀，所述选择阀在其中形成有节流位置和连通位置，并且通常保持在节流位置并与 转向阀的操作，从而选择阀i 当任何一个转向阀被手动操作时，转换到其通信位置。

公开(公告)号：US4047590A

公开(公告)日：1977-09-13

申请号：US638071

申请日：1975-12-05

申请人： Kenzo Hoashi ,  Nobuaki Inaba

发明人： Kenzo Hoashi ,  Nobuaki Inaba

IPC分类号： B62D5/09 ,  B62D5/06

CPC分类号： B62D5/09

摘要： A hydraulic circuit for steering control in articulate vehicles which comprises an engine, a fixed displacement pump driven by the engine, a variable displacement pump driven by the engine, an exit port of the variable displacement pump being connected to a control valve of a steering actuator, an orifice provided at an outlet side of the fixed displacement pump and, a controlling cylinder connected to the variable displacement pump for controlling displacement of the variable displacement pump, the controlling cylinder being actuated by a spring disposed therein and a differential hydraulic pressure at the orifice.

摘要翻译： 一种用于铰接式车辆中的转向控制的液压回路，包括发动机，由发动机驱动的固定排量泵，由发动机驱动的可变排量泵，可变排量泵的出口连接到转向致动器的控制阀 ，设置在固定排量泵的出口侧的孔口和连接到可变排量泵的控制缸，用于控制可变排量泵的排量，控制缸由设置在其中的弹簧致动，并且在该位移泵处的差动液压 孔。

公开(公告)号：US4324098A

公开(公告)日：1982-04-13

申请号：US122273

申请日：1980-02-19

申请人： Taketo Aruga ,  Koichi Morita ,  Kenzo Hoashi ,  Yasuo Kojima

发明人： Taketo Aruga ,  Koichi Morita ,  Kenzo Hoashi ,  Yasuo Kojima

IPC分类号： B62D11/04 ,  F16H61/40 ,  F16H61/4043 ,  F16H39/46

CPC分类号： F16H61/456 ,  F16H61/42 ,  F16H61/423

摘要： A hydraulic circuit for a hydraulically driven vehicle comprising a pair of variable displacement pumps each driven by a common engine, a pair of variable displacement motors each connected with the respective variable displacement pumps in a closed loop circuit and driven thereby, a fixed displacement charge pump driven by the engine, and a pair of shuttle valves each connected in parallel with the respective closed loop circuits and has formed therein a neutral position and two offset positions wherein in the neutral positions of the shuttle valves both the closed loop circuits are connected with each other through the shuttle valves.

摘要翻译： 一种用于液压驱动车辆的液压回路，包括一对各自由公共发动机驱动的可变排量泵，一对可变排量电动机，每个可变排量电动机以闭环回路并由其驱动的相应可变排量泵连接，固定排量电荷泵 由发动机驱动的一对往复阀和各自与各个闭环回路并联连接的梭阀，并且在其中形成有中立位置和两个偏移位置，其中在往复阀的中间位置，两个闭环回路与每个 其他通过梭阀。

公开(公告)号：US4376371A

公开(公告)日：1983-03-15

申请号：US195382

申请日：1980-10-09

申请人： Yasuo Kojima ,  Koichi Morita ,  Kenzo Hoashi ,  Taketo Aruga

发明人： Yasuo Kojima ,  Koichi Morita ,  Kenzo Hoashi ,  Taketo Aruga

IPC分类号： B60R16/08 ,  B60K17/10 ,  B62D11/04 ,  B62D11/18 ,  F15B13/09

CPC分类号： B62D11/18 ,  B60K17/10

摘要： A hydraulic circuit for a hydraulically driven vehicle comprising a pair of variable displacement hydraulic pumps, a pair of hydraulic motors each connected with the respective variable displacement pumps in a closed loop, and a straight run compensator valve connected between the respective closed loops for equalizing fluid pressure in both closed loops when the vehicle is set in a straight run thereby assuring a steady straight run of the vehicle irrespective of the difference in displacement of the respective variable displacement pumps.

摘要翻译： 一种用于液压驱动车辆的液压回路，包括一对可变排量液压泵，一对液压马达，每个液压马达各自与闭合回路中的可变排量泵连接，以及连接在相应闭合回路之间的直行程补偿阀，用于均衡流体 当车辆设置在直线运行中时，两个闭合回路中的压力，由此确保车辆的稳定的直线行驶，而与各个可变排量泵的位移的差异无关。

公开(公告)号：US4024721A

公开(公告)日：1977-05-24

申请号：US643119

申请日：1975-12-22

申请人： Hiroshi Takada ,  Kenzo Hoashi

发明人： Hiroshi Takada ,  Kenzo Hoashi

IPC分类号： E21D9/093 ,  E21B7/04 ,  E21B7/20 ,  E21B7/28 ,  E21D9/08 ,  F16L1/00

CPC分类号： E21B7/28 ,  E21B7/046 ,  E21B7/20 ,  E21B7/203

摘要： There is disclosed a method and apparatus for laying small-diameter gas, water pipes or the like precisely in the ground. Small-diameter pilot pipes are first laid in while at the same time, a pilot head is measured and controlled to make its straight advance. Pipes of a larger diameter are then laid in successively, the pipes being led by the pilot pipes. Concurrent with this, excavated earth is discharged through the laid-in pilot pipes.

摘要翻译： 公开了一种将小直径气体，水管等精确地放置在地面中的方法和装置。 首先放置小直径的先导管，同时测量和控制引导头使其直线前进。 然后连续放置较大直径的管道，管道由引导管引导。 与此同时，挖出的地球通过铺设的先导管排出。