公开(公告)号：US4628690A

公开(公告)日：1986-12-16

申请号：US645730

申请日：1984-08-30

申请人： Mitsuru Arai ,  Hideyori Sato ,  Shoichiro Inatomi

发明人： Mitsuru Arai ,  Hideyori Sato ,  Shoichiro Inatomi

IPC分类号： E02F9/22 ,  E02F9/12 ,  F15B11/00 ,  F16D31/02

CPC分类号： F16H61/4061 ,  E02F9/123 ,  E02F9/128 ,  F16H61/40 ,  F16H61/4043 ,  F16H61/4148

摘要： A hydraulic circuit is disclosed for driving a bidirectional hydraulic motor from a pump via a hand operated directional control valve, as for propelling an earthmover or actuating an implement assembly thereon. For mitigating an abrupt pressure rise as when the motor is set into or out of rotation, the circuit has a pair of oppositely directed dual pressure relief valves connected in parallel with each other between a pair of main lines extending between motor and directional control valve. Each dual pressure relief valve is normally conditioned to pass at a predetermined lower pressure the pressurized fluid from one of the main lines and to pass at a predetermined higher pressure the pressurized fluid from the other main line. When pilot operated from a timing valve responsive to a pressure differential between the main lines, that one of the relief valves which has been bleeding off the pressurized fluid at the low pressure is closed, with the result that the pressurized fluid is then released at the high pressure through the other relief valve, thereby causing two stepwise pressure rises for the reduction of a shock. The invention proposes the provision of a variable resistor between the timing valve and each main line for variably delaying the pilot actuation of the relief valves by the timing valve.

摘要翻译： 公开了一种用于通过手动方向控制阀从泵驱动双向液压马达的液压回路，用于推动推土或在其上致动工具组件。 为了减轻与电动机进入或退出旋转之间的突然的压力升高，电路具有一对相反方向的双重压力释放阀，它们彼此并联连接在电动机和方向控制阀之间延伸的一对主线之间。 每个双压力释放阀通常被调节以使预定的较低压力从主线之一通过加压流体，并且以预定的较高压力从另一个主管路通过加压流体。 当导向器响应于主管之间的压力差从定时阀操作时，已经将处于低压下的加压流体渗出的溢流阀中的一个被关闭，结果是加压流体然后在 高压通过另一个安全阀，从而导致两个逐步的压力升高以减少冲击。 本发明提出在定时阀和每个主管线之间设置可变电阻器，用于通过定时阀可变地延迟安全阀的先导操作。

公开(公告)号：US4520625A

公开(公告)日：1985-06-04

申请号：US471341

申请日：1983-03-02

申请人： Hideyori Sato ,  Nobuaki Inaba ,  Mitsuru Arai ,  Michio Onzou

发明人： Hideyori Sato ,  Nobuaki Inaba ,  Mitsuru Arai ,  Michio Onzou

IPC分类号： F15B13/02 ,  F16H61/40 ,  F16H61/4148 ,  F16H61/4157 ,  F16D31/02

CPC分类号： F16H61/4157 ,  F15B13/02 ,  F16H61/40 ,  F16H61/4148

摘要： A hydraulic brake valve system for use in a hydraulic circuit consisting of driving and braking fluid lines and including therein at least a hydraulic motor for the actuation of an inertia body such as, for example, a construction vehicle or work implements thereof has a counterbalance valve, a cross-over safety valve, a drain change-over valve and a timer valve. The cross-over safety valve consists of two common relief valves, each having two pressure receiving surfaces and adapted to relieve pressurized fluid acted on one of the pressure receiving surfaces at a low pressure and relieve pressurized fluid acted on the other pressure receiving surface at a high pressure, wherein the first port of one of said relief valves is connected with said driving fluid line and the second port thereof is connected with said braking fluid line, whilst the first port of the other relief valve is connected with said braking fluid line and the second port thereof is connected with said driving fluid line.

摘要翻译： 一种用于由驱动和制动流体管线组成的液压回路的液压制动阀系统，其中至少包括用于致动诸如施工车辆或其工具的惯性体的液压马达具有平衡阀 ，交叉安全阀，排水转换阀和定时阀。 交叉安全阀由两个共同的安全阀组成，每个安全阀具有两个压力接收表面，并且适于在低压下减轻作用在压力接收表面之一上的加压流体，并且在一个压力接收表面上减轻作用在另一压力接收表面上的加压流体 其中一个所述安全阀的第一端口与所述驱动流体管线连接，并且其第二端口与所述制动流体管线连接，而另一泄压阀的第一端口与所述制动流体管线相连接， 其第二端口与所述驱动流体管线连接。

公开(公告)号：US4372335A

公开(公告)日：1983-02-08

申请号：US237769

申请日：1981-02-24

申请人： Hideyori Sato ,  Nobuaki Inaba ,  Shigeru Shinohara

发明人： Hideyori Sato ,  Nobuaki Inaba ,  Shigeru Shinohara

IPC分类号： F15B13/06 ,  F15B13/02 ,  G05D11/03

CPC分类号： F15B13/022 ,  Y10T137/2524 ,  Y10T137/2579

摘要： A flow divider valve assembly for dividing a flow of fluid between a priority flow device, such as a power steering system, and an excess flow device, such as an auxiliary mechanism. The flow divider valve assembly comprises a valve body defining an inlet port to be connected to a source of fluid under pressure, a priority flow outlet port, an excess flow outlet port and a valve bore interconnecting the ports, and a valve spool axially movable within the valve bore, the valve spool having formed therein an axial bore for permitting a constant communication between the inlet port and the priority flow outlet port. A first restrictor is disposed between the inlet port and the priority flow outlet port and a second restrictor is disposed between the inlet port and the excess flow outlet port. Restriction rate of the first restrictor is made larger than that of the first restrictor.

摘要翻译： 一种用于在诸如动力转向系统的优先流量装置和诸如辅助机构的过量流动装置之间分配流体流的分流阀组件。 分流阀组件包括阀体，其限定要连接到压力下的流体源的入口端口，优先流出口，过量流出口和互连端口的阀孔以及可在轴向内移动的阀芯 阀芯，其中形成有用于允许入口端口和优先流出口之间的恒定连通的轴向孔的阀芯。 第一限流器设置在入口和优先流出口之间，第二限流器设置在入口和过流出口之间。 第一节流器的限制比第一节流器的限制更大。

公开(公告)号：US4449366A

公开(公告)日：1984-05-22

申请号：US268235

申请日：1981-05-29

申请人： Hideyori Sato ,  Mitsuru Arai

发明人： Hideyori Sato ,  Mitsuru Arai

IPC分类号： E02F9/22 ,  F15B11/17 ,  F16H39/46

CPC分类号： F15B11/17 ,  E02F9/2232 ,  E02F9/2239 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/3116 ,  F15B2211/3127 ,  F15B2211/67 ,  F15B2211/71

摘要： A hydraulic excavator is disclosed which includes two sets of manual control valves for selectively placing a pair of variable displacement pumps in and out of communication with hydraulically driven components such as propelling motors, arm cylinders and boom cylinders. In order to minimize the per-cycle displacement of the pumps when same are discommunicated from all the driven components, a sensing valve is provided which is pilot operated from the sets of manual control valves. When all the manual control valves are in neutral, the sensing valve directs pressurized fluid from a charging pump to a pump-displacement adjustment mechanism thereby causing same to reduce the per-cycle displacement of the pumps to a minimum.

摘要翻译： 公开了一种液压挖掘机，其包括两组手动控制阀，用于选择性地将一对可变排量泵放置在与液压驱动部件（例如推进马达，臂缸和动臂缸）连通中。 为了尽可能减少泵在与所有从动部件相通时的每循环位移，提供了一组感应阀，该传感阀由该组手动控制阀引导操作。 当所有手动控制阀处于空档状态时，传感阀将加压流体从充气泵引导到泵排量调节机构，从而使泵的排放量逐渐减小到最小。