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公开(公告)号：US06327959B1
公开(公告)日：2001-12-11
申请号：US09600318
申请日：2000-07-13
IPC分类号： F15B1108
CPC分类号： E02F9/2267 , E02F9/2271 , F15B13/021 , F15B13/0418 , F15B2013/006 , Y10T137/86702
摘要： A recovery check valve 26 and a piston valve 27 are axially slidably disposed within a spool 2 in coaxial relation. An axial fluid passage 32 is formed within a cylindrical portion 27a of the piston valve 27, and a seat portion 33 for the recovery check valve is formed at an open end of the cylindrical portion 27a. The cylindrical portion 37a of the piston valve is formed with a hole 36 through which a hydraulic fluid in the fluid chamber 32 is introduced to a bridge passage 21 when the spool 2 is operated so as to introduce a hydraulic fluid from a hydraulic pump to the bottom side of a hydraulic cylinder. Fluid passages 40, 31 are formed within the spool so that a hydraulic fluid in the bridge passage 21 is introduced to the closed end of the piston valve through the fluid passages when the spool is operated in the opposite direction. With such a structure, the size of the valve apparatus can be set to the same size as the directional control valve not provided with the recovery check valve.
摘要翻译： 回收止回阀26和活塞阀27以同轴的关系轴向可滑动地设置在阀芯2内。 轴向流体通道32形成在活塞阀27的圆筒形部分27a内，并且用于回收止回阀的座部33形成在圆柱形部分27a的开口端。 活塞阀的圆筒部37a形成有孔36，当阀芯2被操作时，流体室32中的液压流体通过该孔36被引导到桥接通道21，以将来自液压泵的液压流体引入到 液压缸底部。 流体通道40,31形成在阀芯内，使得当阀芯沿相反方向操作时，桥式通道21中的液压流体通过流体通道被引入活塞阀的封闭端。 通过这样的结构，可以将阀装置的尺寸设定为与未设置回收止回阀的方向控制阀相同的尺寸。
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公开(公告)号：US06438952B1
公开(公告)日：2002-08-27
申请号：US09673938
申请日：2000-10-24
IPC分类号： F15B1105
CPC分类号： F15B11/163 , E02F9/2221 , E02F9/2225 , F15B11/0406 , F15B13/0417 , F15B2211/20538 , F15B2211/20553 , F15B2211/30505 , F15B2211/30525 , F15B2211/30535 , F15B2211/40515 , F15B2211/41509 , F15B2211/41527 , F15B2211/455 , F15B2211/46 , F15B2211/50518 , F15B2211/50554 , F15B2211/5151 , F15B2211/57 , F15B2211/6051 , F15B2211/6052 , F15B2211/6054 , F15B2211/6055 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/76
摘要： A hydraulic circuit system having a load sensing system including a hydraulic pump, a plurality of hydraulic actuators driven by a hydraulic fluid delivered from the hydraulic pump, a plurality of control valves disposed between the hydraulic pump and the plurality of acutators, a signal detecting hydraulic line to which a signal pressure based on a maximum load pressure among the plurality of hydraulic actuators is introduced, and pump control means for controlling a delivery pressure of the hydraulic pump to be held higher than the signal pressure by a predetermined value.
摘要翻译： 一种具有负载感测系统的液压回路系统，包括液压泵，由从液压泵输送的液压流体驱动的多个液压致动器，设置在液压泵和多个辅助器之间的多个控制阀， 引入基于多个液压致动器中的最大负载压力的信号压力的线路，以及用于控制液压泵的输送压力保持高于信号压力预定值的泵控制装置。
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公开(公告)号：US06422009B1
公开(公告)日：2002-07-23
申请号：US09744308
申请日：2001-01-23
IPC分类号： F15B1100
CPC分类号： E02F9/2296 , E02F9/2232 , F04B49/002 , F15B11/165 , F15B11/17 , F15B2211/20546 , F15B2211/20584 , F15B2211/253 , F15B2211/30515 , F15B2211/40515 , F15B2211/41572 , F15B2211/50572 , F15B2211/513 , F15B2211/5158 , F15B2211/6054 , F15B2211/6355 , F15B2211/7052 , F15B2211/71 , F15B2211/88 , Y10T137/2705
摘要： A fixed throttle 12 is provided in a delivery line 11a of a fixed pump 11 driven by an engine 9 for rotation together with a hydraulic pump 1, and a differential pressure detecting valve 31 is provided in association with the fixed throttle 12 to detect a differential pressure across the fixed throttle 12 and to output a pressure lower than the detected differential pressure by a predetermined value. The output of the differential pressure detecting valve 31 is introduced, as a signal pressure, to a pressure bearing section 5c of a load sensing valve 5, thereby setting a target differential pressure. With that arrangement, a pressure in link with an engine revolution speed can be directly employed as the set differential pressure of the load sensing valve, and the structure of the load sensing valve can be avoided from being complicated. Further, in the idling revolution range in which the work amount is relatively small, the displacement of the hydraulic pump can be reduced to improve fine operability and cut down fuel consumption.
摘要翻译： 固定节流阀12设置在由液压泵1与发动机9一起驱动的固定泵11的输送管线11a中，并且与固定节流阀12相关联地设置有差压检测阀31，以检测差速器 并且将低于检测到的差压的压力输出预定值。 差压检测阀31的输出作为信号压力引入负载检测阀5的压力承受部5c，从而设定目标压差。 通过这种结构，可以直接使用与发动机转速相关的压力作为负载感测阀的设定差压，并且可以避免负载感测阀的结构复杂化。 此外，在工作量相对较小的怠速转速范围内，能够降低液压泵的排量，提高精细的操作性，并且降低燃料消耗。
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公开(公告)号：US06408876B1
公开(公告)日：2002-06-25
申请号：US09601251
申请日：2000-10-13
IPC分类号： F16K1124
CPC分类号： F15B11/165 , F15B2211/20546 , F15B2211/20576 , F15B2211/30525 , F15B2211/329 , F15B2211/6355 , F15B2211/67 , F16K11/07 , F16K27/041 , Y10T137/87193 , Y10T137/87201
摘要： It is an object of the present invention to provide a control valve which can reduce the number of external lines connected to a hydraulic remote control valve. A control valve 1 for controlling hydraulic cylinders 2,2′ is provided, in one 26 of spool covers, with fluid passages 27,27′, a shuttle valve 28 for selecting higher one of pilot pressures to be transmitted to these fluid passages 27,27′, and a fluid passage 29 for transmitting the pressure selected by the shuttle valve 28. The fluid passages 27,27′ are in communication with pressure fluid ports 25,25′ as connection ports for pilot lines 24a,24c. The control valve 1 is also provided, in the other spool cover 32, with fluid passages 33,33′, a shuttle valve 34 for selecting higher one of pilot pressures to be transmitted to these fluid passages 33,33′, and a fluid passage 35 for transmitting the pressure selected by the shuttle valve 34. The fluid passages 33,33′ are in communication with pressure fluid ports 31,31′ as connection ports for pilot lines 24b,24d.
摘要翻译： 本发明的目的是提供一种可以减少连接到液压遥控阀的外部线路的数量的控制阀。 用于控制液压缸2,2'的控制阀1设置在一个26个卷轴盖中，其中包括流体通道27,27'，用于选择要传递到这些流体通道27的先导压力中的较高一个的往复阀28， 27'和用于传递由梭阀28选择的压力的流体通道29.流体通道27,27'与用于引导管线24a，24c的连接端口的压力流体端口25,25'连通。 控制阀1还在另一个卷轴盖32中设置有流体通道33,33'，用于选择要传递到这些流体通道33,33'的先导压力中的较高一个的往复阀34和流体通道 35，用于传递由梭阀34选择的压力。流体通道33,33'与用于导向管线24b，24d的连接端口的压力流体端口31,31'连通。
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公开(公告)号：US06681794B2
公开(公告)日：2004-01-27
申请号：US10031169
申请日：2002-01-17
IPC分类号： F16K1704
CPC分类号： F04B49/03 , Y10T137/2579 , Y10T137/2605 , Y10T137/2642
摘要： A spool 33 provided with a flange 39 is inserted in a spool bore 32, and a pressing force of a spring 52 is always applied through the flange 39 to the spool 33 at its one end in a second pressure chamber 35. A fluid groove 60 is formed in an inner peripheral surface of the spool bore 32 at a position near an abutment surface 51. A hydraulic fluid under the same pressure P2 as that in the second pressure chamber 35 is introduced to the fluid groove 60 through a fluid passage 61 formed in a valve body 31. When the flange 39 and the abutment surface 51 are in contact with each other, the hydraulic fluid is allowed to enter the interface between them through the fluid groove 60. A rise of the cracking pressure, which occurs upon the flange coming into tightly close contact with the abutment surface, can be prevented without reducing the strength of the flange 39, and stable opening/closing characteristics of the spool 33 can be achieved.
摘要翻译： 设置有凸缘39的卷轴33插入卷轴孔32中，并且弹簧52的按压力总是通过凸缘39施加到卷轴33的一端处于第二压力室35中。流体槽60 在靠近抵接表面51的位置处形成在滑阀孔32的内周表面中。在与第二压力室35相同的压力P2下的液压流体通过形成的流体通道61被引入到流体槽60中 在阀体31中。当凸缘39和抵接表面51彼此接触时，允许液压流体通过流体槽60进入它们之间的界面。裂化压力的上升发生在 可以防止法兰与邻接表面紧密接触，而不会降低凸缘39的强度，并且可以实现稳定的卷轴33的打开/关闭特性。
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公开(公告)号：US06453585B1
公开(公告)日：2002-09-24
申请号：US09980543
申请日：2001-12-04
IPC分类号： F15B1100
CPC分类号： E02F9/2267 , E02F9/2239 , E02F9/2271 , E02F9/2282 , E02F9/2292 , E02F9/2296 , F15B11/162 , F15B11/17 , F15B2211/20553 , F15B2211/20576 , F15B2211/3116 , F15B2211/329 , F15B2211/40515 , F15B2211/428 , F15B2211/7142 , F15B2211/78
摘要： To permit forcedly stopping combining flows of pressure fluid from two hydraulic pumps when a load pressure on a combined-flow-driven actuator in which the flows of pressure fluid are combined together exceeds a predetermined pressure and hence to permit driving the combined-flow-driven actuator with the pressure fluid from only one of the hydraulic pumps, a hydraulic drive system is provided with a flow-combining valve 2 connected to a directional control valve 1 in a first group of directional control valves via a center bypass passage 3, a flow-combining circuit 5 communicating the flow-combining valve 2 and a supply port of a flow-combining directional control valve 4 with each other, and a combined-flow-driven actuator 20 controlled by the flow-combining directional control valve 4, and performs overall power control such that a total value of input torques to the two hydraulic pumps 15,18 does not exceed an output torque from an engine 30. The hydraulic drive system is provided with a canceling valve 10 to cancel the combination of flows by the flow-combining valve 2 when a load pressure on the combined-flow-driven actuator 20 becomes higher than a predetermined pressure.
摘要翻译： 当压力流体组合在一起的组合流动驱动致动器上的负载压力超过预定压力并因此允许驱动组合流动驱动时，允许强制停止组合来自两个液压泵的压力流体流 致动器与来自仅一个液压泵的压力流体相连，液压驱动系统设置有通过中心旁通通道3连接到第一组方向控制阀中的方向控制阀1的流动合并阀2，流动 将组合阀2和组合方向控制阀4的供给口彼此连通的组合回路5和由组合方向控制阀4控制的组合流动驱动致动器20，并进行 整体功率控制使得两个液压泵15,18的输入转矩的总值不超过来自发动机30的输出扭矩。液压驱动系统设置为w 一个取消阀10，当组合流动致动器20上的负载压力变得高于预定压力时，消除组合阀2的流动的组合。
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公开(公告)号：US06378302B1
公开(公告)日：2002-04-30
申请号：US09674366
申请日：2000-10-31
IPC分类号： F16D3102
CPC分类号： F15B11/167 , E02F9/128 , E02F9/2225 , E02F9/226 , E02F9/2296 , F15B11/163 , F15B11/168 , F15B13/0417 , F15B2211/40515 , F15B2211/40569 , F15B2211/428 , F15B2211/455 , F15B2211/46 , F15B2211/50518 , F15B2211/50536 , F15B2211/5157 , F15B2211/55 , F15B2211/6355 , F15B2211/651 , F15B2211/71 , F15B2211/78
摘要： A hydraulic line slit 20 formed in a valve body 50 of a flow distribution valve 5-1, a control chamber 70, and a hydraulic line 31-1 are connected to a signal transmitting hydraulic line 9. A lap portion 32 is formed in the hydraulic line slit 20, the lap portion 32 having a check valve function with a lap amount X when the valve body 50 is in a cutoff position. A 2-position, 3-way valve 11 is disposed in the hydraulic line 31-1. The valve 11 connects the control chamber 70 of the flow distribution valve 5-1 to only the signal transmitting hydraulic line 9 when an external signal F is not applied, and to both the signal transmitting hydraulic line 9 and a lower-pressure detecting hydraulic line 35, which is connected an outlet passage 5b of a flow distribution valve 5-2 on the side of a hydraulic actuator 3-2, when the external signal F is applied. With such an arrangement, during a combined operation including driving of an inertial body, a pressure on the lower load pressure side can be detected as a signal pressure without cutting off a load-pressure detecting hydraulic line on the higher load pressure side. Further, a portion for detecting a load pressure is simplified and the flow distributing function is not impaired.
摘要翻译： 形成在分流阀5-1的阀体50上的液压线狭缝20，控制室70以及液压管线31-1连接到信号传输液压管路9上。搭接部分32形成在 液压线狭缝20，当阀体50处于切断位置时，具有止回阀的搭接部32具有搭接量X。 2位三通阀11设置在液压管线31-1中。 当未施加外部信号F时，阀11将分流阀5-1的控制室70仅连接到信号传输液压管路9，并且在信号传输液压管线9和低压检测液压管线 当外部信号F被施加时，其连接有液压致动器3-2一侧的分流阀5-2的出口通道5b。 通过这样的布置，在包括惯性体的驱动的组合操作中，可以将下负载压力侧的压力检测为信号压力，而不会在较高负载压力侧切断负载压力检测液压管路。 此外，用于检测负载压力的部分被简化，并且流量分配功能不受损害。
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公开(公告)号：US5957159A
公开(公告)日：1999-09-28
申请号：US142870
申请日：1998-09-17
CPC分类号： E02F9/2267 , E02F9/2225 , E02F9/2271 , E02F9/2296 , F15B11/05 , F15B2211/20553 , F15B2211/3053 , F15B2211/30555 , F15B2211/3144 , F15B2211/329 , F15B2211/35 , F15B2211/71 , F15B2211/78 , Y10T137/87169 , Y10T137/87185
摘要： A pair of directional control valves 8 and a pair of hold check valves 9 are disposed respectively between a pair of metering notches 6, which are formed in a land 4-1 of a spool 2 and have functions of both flow rate control and direction control, and a pair of actuator ports A, B. Each hold check valve comprises a valve body 90 in the form of a hollow spool having a seat portion 12 formed on an outer periphery and being subject to a pressure developed in an outlet passage 10 communicating with one of the actuator ports to act in the valve-closing direction. Each flow distribution valve comprises a valve body 80 being slidably fitted in the valve body 90 and having a front surface positioned to face an inlet passage 7 communicating with the metering notch and a rear surface positioned to face an control pressure chamber 30 communicating with a signal detecting hydraulic line. The valve body 90 has a shape to maintain a balance between forces produced by a pressure in the control pressure chamber and acting upon the valve body. A slit 21 having a variable dead zone X2 is formed between the valve body 80 and the valve body 90 for detecting and introducing a pressure between an outlet portion of the flow distribution valve and an inlet portion of the hold check valve to the control pressure chamber. The casing structure and device construction of a directional control valve with postpositional type flow distribution valves are thereby simplified.
摘要翻译： PCT No.PCT / JP98 / 00197 Sec。 371日期：1998年9月17日 102（e）1998年9月17日PCT PCT 1998年1月20日PCT公布。 第WO98 / 31940号公报 日期1998年7月23日一对方向控制阀8和一对保持止回阀9分别设置在一对计量凹口6之间，这些计量凹口6形成在阀芯2的平台4-1中并且具有两个流动 速度控制和方向控制以及一对致动器端口A，B。每个保持止回阀包括中空阀芯形式的阀体90，该阀体具有形成在外周上的阀座部分12， 与致动器端口中的一个连通的出口通道10以沿阀关闭方向作用。 每个流量分配阀包括可滑动地装配在阀体90中的阀体80，其具有面向与计量凹口连通的入口通道7的前表面以及与信号通信的控制压力室30相对的后表面 检测液压管路。 阀体90具有保持由控制压力室中的压力产生的作用在阀体上的力之间的平衡的形状。 具有可变死区X2的狭缝21形成在阀体80和阀体90之间，用于检测和分配在分流阀的出口部分和保持止回阀的入口部分之间的压力到控制压力室 。 因此简化了具有后置式流量分配阀的方向控制阀的壳体结构和装置结构。
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公开(公告)号：US6135149A
公开(公告)日：2000-10-24
申请号：US367232
申请日：1999-08-11
CPC分类号： F15B11/05 , F15B13/0417 , F15B2211/20553 , F15B2211/30505 , F15B2211/30535 , F15B2211/355 , Y10T137/87169 , Y10T137/87185
摘要： Pressure compensating valves disposed at inlet sides of directional control valves are each configured with a step-shaped spool having a larger diameter portion and smaller diameter portions and pressure receiving chambers are provided to sandwich the larger diameter portion such that a pump delivery pressure and an inlet pressure of a metering throttle of the directional control valve acts in the chambers, respectively, and further pressure receiving chambers are provided at respective ends of the smaller diameter portions such that an outlet pressure of the metering throttle and a signal pressure act in the chambers, respectively. A check valve operated by the outlet pressure of the metering throttle is fitted in the smaller diameter end portion positioned on the side of the pressure receiving chamber to reduce the pump delivery pressure and produce a signal pressure. A sleeve having opposed ends positioned in a pressure receiving chamber in which the outlet pressure of the metering throttle is introduced and in the pressure receiving chamber is fitted on the smaller diameter portion, and the outlet pressure of the metering throttle is introduced to the pressure receiving chamber by movement of the sleeve.
摘要翻译： PCT No.PCT / JP99 / 00051 Sec。 371日期1999年8月11日 102（e）1999年8月11日PCT PCT 1999年1月11日PCT公布。 出版物WO99 / 35408 日期1999年7月15日设置在方向控制阀的入口侧的压力补偿阀各自配置有具有较大直径部分和较小直径部分的阶梯形卷轴，并且设置压力接收室以夹持较大直径部分，使得泵 方向控制阀的计量节气门的输送压力和入口压力分别作用在室中，并且另外的压力接收室设置在较小直径部分的相应端部处，使得计量节流阀的出口压力和信号压力 分别在室内行事。 通过计量节流阀的出口压力操作的止回阀装配在位于压力接收室一侧的较小直径端部分中，以减小泵输送压力并产生信号压力。 具有相对端的套筒，其位于压力接收室中，其中计量节流阀的出口压力被引入并且在压力接收室中安装在较小直径部分上，并且计量节流阀的出口压力被引入压力接收 通过袖子的移动。
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公开(公告)号：US5921165A
公开(公告)日：1999-07-13
申请号：US011555
申请日：1998-02-10
IPC分类号： E02F9/22 , F15B11/02 , F15B11/028 , F15B13/01 , F15B11/08
CPC分类号： E02F9/2267 , E02F9/226 , E02F9/2271 , F15B11/02 , F15B11/028 , F15B13/015 , F15B2211/20538 , F15B2211/30505 , F15B2211/30515 , F15B2211/30525 , F15B2211/3116 , F15B2211/329 , F15B2211/40515 , F15B2211/41527 , F15B2211/428 , F15B2211/46 , F15B2211/50518 , F15B2211/5151 , F15B2211/528 , F15B2211/55 , F15B2211/6355 , F15B2211/7053
摘要： In a hydraulic control system including a valve device B for controlling a hydraulic fluid supplied from a hydraulic pump A to a hydraulic cylinder C, the valve device comprises a spool 16 slidably fitted into a valve body 1, and a non-leak valve 27 for controlling communication of an actuator passage 19. The non-leak valve comprises a main valve section 40 including a seat valve 41 provided in the valve body, and a pilot control section 60 including a pilot poppet valve 61 provided in an end cover 31. The seat valve is controlled in proportion to an opening of the pilot poppet valve, and a relief valve 55 for preventing the hydraulic cylinder from being subject to an overload is built in the seat valve. The non-leak valve thus fulfills a load holding function and an overload relief function. By arranging the non-leak valve and the spool in two lines, the valve device can be made more compact.
摘要翻译： PCT No.PCT / JP97 / 02713 Sec。 371日期1998年2月10日 102（e）1998年2月10日PCT PCT 1997年8月5日PCT公布。 公开号WO98 / 06949 日期：1998年2月19日在包括用于控制从液压泵A供给到液压缸C的液压流体的阀装置B的液压控制系统中，阀装置包括可滑动地装配到阀体1中的阀芯16， - 用于控制致动器通道19的连通的泄漏阀27.无泄漏阀包括主阀部分40，其包括设置在阀体中的阀座41，以及引导控制部分60，其包括提供在阀 座盖阀与先导提升阀的开口成比例地被控制，并且用于防止液压缸遭受过载的安全阀55被内置在座阀中。 因此，无泄漏阀实现负载保持功能和过载释放功能。 通过将无泄漏阀和阀芯设置成两条线，可以使阀装置更紧凑。
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