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公开(公告)号：US5398507A
公开(公告)日：1995-03-21
申请号：US856972
申请日：1992-06-03
CPC分类号： E02F9/2225 , E02F9/2232 , E02F9/2296 , F15B11/165 , F15B2211/20553 , F15B2211/20592 , F15B2211/40515 , F15B2211/40569 , F15B2211/413 , F15B2211/455 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058 , F15B2211/6355 , F15B2211/71
摘要： This invention has for its aim to provide a hydraulic circuit system arranged such that, even at the time of commencement of drive of a hydraulic actuator with a large inertia, a slow rise in the drive pressure can be achieved, thereby preventing the occurrence of hunting phenomenon. The hydraulic circuit system according to the present invention comprises a plurality of operating valves (15) provided in a discharge conduit (10a) of a hydraulic pump (10), and pressure compensating valves (18) provided in connection conduits between these operating valves (15) and respective hydraulic actuators (16), wherein each of the pressure compensating valves (18) is set at a highest value of load pressures of each of the hydraulic actuators (16), and the displacement of the pump is controlled by a change-over valve (14) adapted to be actuated by the difference between the pump discharge pressure and the load pressure. The hydraulic circuit comprises a bypass conduit (31) connected with a load pressure introduction conduit (30) for introducing the load pressure into a pressure receiving portion of the change-over valve (14). This bypass conduit is connected through a bypass valve (32) adapted to conduct throttling of fluid in inverse proportion to the change in the area of opening of each of the operating valves (15).
摘要翻译： PCT No.PCT / JP91 / 01284第 371日期：1992年6月3日 102（e）日期1992年6月3日PCT 1991年9月26日PCT公布。 出版物WO92 / 06304 本发明的目的在于提供一种液压回路系统，其设置为使得即使在开始具有大惯性的液压致动器的驱动时，也可以实现驱动压力的缓慢上升 ，从而防止发生狩猎现象。 根据本发明的液压回路系统包括设置在液压泵（10）的排出管道（10a）中的多个操作阀（15）和设置在这些操作阀之间的连接管道中的压力补偿阀（18） 15）和相应的液压致动器（16），其中每个压力补偿阀（18）被设置在每个液压致动器（16）的负载压力的最高值，并且泵的位移由变化控制 （14），其适于由泵排出压力和负载压力之间的差异致动。 液压回路包括与负载压力引入导管（30）连接的旁通管道（31），用于将负载压力引入转换阀（14）的受压部分。 该旁通管道通过旁通阀（32）连接，该旁通阀（32）适于与每个操作阀（15）的打开面积的变化成反比地导通流体节流。
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公开(公告)号：US5273069A
公开(公告)日：1993-12-28
申请号：US793385
申请日：1992-03-16
CPC分类号： E02F9/2232 , E02F9/2225 , E02F9/2296 , F15B13/0417 , Y10T137/87169 , Y10T137/87185
摘要： An operation valve having a pressure compensation valve of relatively simple non-complicated internal body structure. In the valve body, a load pressure introducing passage, a check valve and a restriction are formed inside the spool comprising the operation valve. An intermediate pressure between an inlet pressure and an outlet pressure of the compensation valve which is arranged in the valve body, may be supplied to a pressure receiving section of the pressure compensation valve through an oil hole of the spool. The operation valve with the pressure compensation valve is of simple construction and may be easily manufactured.
摘要翻译： PCT No.PCT / JP91 / 00638 Sec。 371日期：1992年3月16日 102（e）1992年3月16日PCT PCT 1991年5月15日提交PCT公布。 出版物WO91 / 18211 PCT 日期为1991年11月28日。具有相对简单的非复杂内部结构的压力补偿阀的操作阀。 在阀体中，在包括操作阀的阀芯内部形成有负载压力引入通道，止回阀和限制器。 布置在阀体中的补偿阀的入口压力和出口压力之间的中间压力可以通过阀芯的油孔供应到压力补偿阀的受压部分。 具有压力补偿阀的操作阀结构简单，制造容易。
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公开(公告)号：US5271227A
公开(公告)日：1993-12-21
申请号：US793395
申请日：1992-01-09
CPC分类号： E02F9/2232 , F15B11/163 , F15B11/165 , F15B13/0417 , F15B2211/20553 , F15B2211/3054 , F15B2211/3111 , F15B2211/3144 , F15B2211/40515 , F15B2211/40569 , F15B2211/413 , F15B2211/455 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058 , F15B2211/7052 , F15B2211/71
摘要： In the hydraulic apparatus (1) according to a first aspect of the present invention, mid-pressures between the inlet side and outlet side pressures of a first and a second pressure compensating valves (4, 4') are permitted to act on the flow rate decreasing side pressure receiving surfaces (4b, 4b') thereof through first and second mid-pressure supplying means (13, 13'), thereby restraining operational error and malfunction of the pressure compensating valves (4, 4'). In the hydraulic apparatus (20) according to a second aspect of the present invention. when actuating valves are made to assume neutral position, holding pressures of hydraulic actuators (5, 5') are permitted to act on flow rate decreasing side pressure receiving surfaces (4b, 4b') of pressure compensating valves (4), (4') so that spools of the pressure compensating valves are held at compensating position, thereby improving the response of the hydraulic actuators (5, 5') to lever actuation.
摘要翻译： PCT No.PCT / JP91 / 00641 Sec。 371日期1992年1月9日 102（e）日期1992年1月9日PCT 1991年5月15日PCT PCT。 出版物WO91 / 18212 PCT 1991年11月28日，在本发明的第一方面的液压装置（1）中，第一和第二压力补偿阀（4,4'）的入口侧和出口侧压力之间的中间压力， 被允许通过第一和第二中压供给装置（13,13'）作用在其流量减小侧压力接收表面（4b，4b'）上，从而抑制压力补偿阀（4， 4'）。 在本发明的第二方面的液压装置（20）中， 当致动阀处于中立位置时，允许液压致动器（5,5'）的保持压力作用在压力补偿阀（4），（4'）的流量减小侧压力接收表面（4b，4b'）上， ），使得压力补偿阀的阀芯保持在补偿位置，从而提高液压致动器（5,5'）对杠杆致动的响应。
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公开(公告)号：US09790966B2
公开(公告)日：2017-10-17
申请号：US14354735
申请日：2012-09-11
申请人： Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
发明人： Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
CPC分类号： F15B15/02 , E02F9/2217 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要： A shuttle valve connects a second flowpath and a drain flowpath when the hydraulic pressure in a first flowpath is greater than the hydraulic pressure in the second flowpath. The shuttle valve connects the first flowpath and the drain flowpath when the hydraulic pressure in a second flowpath is greater than the hydraulic pressure in the first flowpath. The ratio between the pressure receiving area of a first pressure section and the pressure receiving area of a second pressure section is the same as the ratio between the pressure receiving area of a first chamber side and the pressure receiving area of a second chamber side of a cylinder rod.
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公开(公告)号：US20140283510A1
公开(公告)日：2014-09-25
申请号：US14354735
申请日：2012-09-11
申请人： Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
发明人： Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
IPC分类号： F15B15/02
CPC分类号： F15B15/02 , E02F9/2217 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要： A shuttle valve connects a second flowpath and a drain flowpath when the hydraulic pressure in a first flowpath is greater than the hydraulic pressure in the second flowpath. The shuttle valve connects the first flowpath and the drain flowpath when the hydraulic pressure in a second flowpath is greater than the hydraulic pressure in the first flowpath. The ratio between the pressure receiving area of a first pressure section and the pressure receiving area of a second pressure section is the same as the ratio between the pressure receiving area of a first chamber side and the pressure receiving area of a second chamber side of a cylinder rod.
摘要翻译： 当第一流路中的液压大于第二流路中的液压时，梭阀连接第二流路和排水流路。 当第二流路中的液压大于第一流路中的液压时，梭阀连接第一流路和排水流路。 第一压力部的受压面积与第二压力部的受压面积之比与第一室侧的受压面积和第二室侧的受压面积之比 气缸杆。
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公开(公告)号：US5666808A
公开(公告)日：1997-09-16
申请号：US524439
申请日：1995-09-06
申请人： Koji Yamashita , Teruo Akiyama , Kouji Saito , Shinichi Shinozaki
发明人： Koji Yamashita , Teruo Akiyama , Kouji Saito , Shinichi Shinozaki
CPC分类号： E02F9/2267 , E02F9/2225 , E02F9/2271 , E02F9/2296 , F15B13/0417
摘要： An operating valve assembly incorporates a pressure compensation valve and is capable of contributing down-sizing of a hydraulic circuit. The valve assembly includes an operating valve, compensation valves and a load pressure detecting portion. A valve body of the operating valve defines a spool bore extending laterally through the valve body at a vertically intermediate portion of the valve body, a load pressure detecting port at a laterally intermediate portion of the spool bore, and a respective pump port, actuator port and tank port at each side of the load pressure detecting port. The operating valve also includes a spool within the spool bore. The pressure compensation valves are arranged at left and right sides of an upper portion of the valve body and the load pressure detecting portion, for supplying load pressure to the load pressure detecting port, is formed in the spool.
摘要翻译： 一个操作阀组件包括一个压力补偿阀，并能够减小液压回路的减小尺寸。 阀组件包括操作阀，补偿阀和负载压力检测部分。 操作阀的阀体限定在阀体的垂直中间部分横向延伸穿过阀体的阀芯，位于阀芯孔的横向中间部分处的负载压力检测端口和相应的泵口，致动器端口 和负载压力检测端口两侧的油箱口。 操作阀还包括在阀芯孔内的阀芯。 压力补偿阀布置在阀体的上部的左侧和右侧，并且负载压力检测部分用于向负载压力检测口提供负载压力，形成在阀芯中。
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公开(公告)号：US5535663A
公开(公告)日：1996-07-16
申请号：US318631
申请日：1994-10-07
申请人： Koji Yamashita , Teruo Akiyama , Kouji Saito , Shinichi Shinozaki
发明人： Koji Yamashita , Teruo Akiyama , Kouji Saito , Shinichi Shinozaki
CPC分类号： E02F9/2267 , E02F9/2225 , E02F9/2271 , E02F9/2296 , F15B13/0417
摘要： An operating valve assembly incorporates a pressure compensation valve and is capable of contributing down-sizing of a hydraulic circuit. The valve assembly includes an operating valve, compensation valves and a load pressure detecting portion. A valve body of the operating valve defines a spool bore extending laterally through the valve body at a vertically intermediate portion of the valve body, a load pressure detecting port at a laterally intermediate portion of the spool bore, and a respective pump port, actuator port and tank port at each side of the load pressure detecting port. The operating valve also includes a spool within the spool bore. The pressure compensation valves are arranged at left and right sides of an upper portion of the valve body and the load pressure detecting portion for supplying load pressure to the load pressure detecting port is formed in the spool.
摘要翻译： PCT No.PCT / JP93 / 00459 Sec。 371日期：1994年10月7日 102（e）日期1994年10月7日PCT 1993年4月9日PCT公布。 公开号WO93 / 21447 日期为1994年10月28日。一个操作阀组件包括一个压力补偿阀，并能够减小液压回路的尺寸。 阀组件包括操作阀，补偿阀和负载压力检测部分。 操作阀的阀体限定在阀体的垂直中间部分横向延伸穿过阀体的阀芯，位于阀芯孔的横向中间部分处的负载压力检测端口和相应的泵口，致动器端口 和负载压力检测端口两侧的油箱口。 操作阀还包括在阀芯孔内的阀芯。 压力补偿阀布置在阀体的上部的左侧和右侧，并且用于在负载压力检测口中提供负载压力的负载压力检测部分形成在阀芯中。
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公开(公告)号：US09683585B2
公开(公告)日：2017-06-20
申请号：US14129387
申请日：2012-08-13
申请人： Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
发明人： Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
IPC分类号： F15B11/042 , E02F9/22 , F15B11/04
CPC分类号： F15B11/0423 , E02F9/2217 , E02F9/2228 , E02F9/2232 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/0413 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要： A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
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公开(公告)号：US20140130487A1
公开(公告)日：2014-05-15
申请号：US14129387
申请日：2012-08-13
申请人： Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
发明人： Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
IPC分类号： F15B11/042 , F15B11/04 , E02F9/22
CPC分类号： F15B11/0423 , E02F9/2217 , E02F9/2228 , E02F9/2232 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/0413 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要： A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
摘要翻译： 液压驱动系统包括液压泵，驱动源，液压缸，泵和缸之间的闭路液压路径，控制泵的排出流量的泵流量控制单元，流量控制阀 在流体路径中的泵和缸之间，方向控制单元，目标流量设定单元和控制装置。 方向控制单元允许流体从泵到气缸流动，并且当流体经由流量控制阀从泵供应到气缸时，阻止流体从气缸流到泵。 当目标流量在规定范围内时，控制装置利用流量控制阀，当目标流量大于规定范围时，利用泵流量控制单元来控制流向缸的流体。
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公开(公告)号：US5372060A
公开(公告)日：1994-12-13
申请号：US44205
申请日：1993-04-08
申请人： Jun Maruyama , Koji Yamashita , Naoki Ishizaki
发明人： Jun Maruyama , Koji Yamashita , Naoki Ishizaki
IPC分类号： F16K11/07 , F15B13/02 , F16K27/04 , F15B13/043
CPC分类号： F15B13/02 , Y10T137/87201 , Y10T137/87209
摘要： A hydraulic valve assembly comprises a valve body defining first and second valve receptacle bores, a fluid pump, a first fluid passage communicated with the fluid pump, a second fluid passage communicated with a hydraulic load, and a third fluid passage communicated with a fluid reservoir. A first valve sub-assembly including a sleeve enclosing a first valve mechanism therein is disposed within the first valve receptacle body for selectively permitting and blocking introduction of the pressurized working fluid. Also, a second valve sub-assembly including a sleeve enclosing a second valve mechanism therein is disposed within the second valve receptacle bore for selectively establishing and blocking fluid communication between the second and third fluid passage means. A third valve assembly is provided in the valve body for selectively establishing and blocking fluid communication between the load side of the first valve sub-assembly and the second fluid passage for supplying the pressurized working fluid to the hydraulic load. A control valve assembly is provided in the valve body for generating a control pressure for controlling position of the first and second valve subassemblies.
摘要翻译： 液压阀组件包括限定第一和第二阀容纳孔的阀体，流体泵，与流体泵连通的第一流体通道，与液压负载连通的第二流体通道，以及与流体储存器连通的第三流体通道 。 包括其中包围第一阀机构的套筒的第一阀子组件设置在第一阀座体内，用于选择性地允许和阻止加压工作流体的引入。 此外，包括在其中封闭第二阀机构的套筒的第二阀子组件设置在第二阀容纳孔内，用于选择性地建立和阻止第二和第三流体通道装置之间的流体连通。 第三阀组件设置在阀体中，用于选择性地建立和阻断第一阀子组件的负载侧和第二流体通道之间的流体连通，以将加压工作流体供应到液压负载。 控制阀组件设置在阀体中，用于产生用于控制第一和第二阀组件的位置的控制压力。
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