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19 条记录 (耗时 0.029 秒)

    Hydraulique drive device
    1.
    发明授权
    Hydraulique drive device 失效
    液压驱动装置

    公开(公告)号：US06244048B1

    公开(公告)日：2001-06-12

    申请号：US09000222

    申请日：1998-01-23

    申请人： Sotaro Tanaka ,  Gen Yasuda ,  Masami Ochiai ,  Yusaku Nozawa ,  Hideyo Kato

    发明人： Sotaro Tanaka ,  Gen Yasuda ,  Masami Ochiai ,  Yusaku Nozawa ,  Hideyo Kato

    IPC分类号： F16D3102

    CPC分类号： E02F9/2296 ,  E02F9/2242 ,  E02F9/2292

    摘要： A hydraulic drive system for a supersized hydraulic working machine such as a hydraulic excavator includes hydraulic pumps connected to main lines through a delivery line and a supply line. Branch portions from the main line include flow control valves for allowing a hydraulic fluid to flow from the hydraulic pumps toward hydraulic cylinders. A hydraulic reservoir is connected to the main lines through a reservoir line and a drain line. Other branch portions for the drain line include flow control valves for allowing a hydraulic fluid to flow from the hydraulic cylinders toward the hydraulic reservoir. A line branched for the delivery line includes a bypass valve for supplying the hydraulic fluid delivered from the hydraulic pumps to the supply line at a desired flow rate and returning the remaining hydraulic fluid to the hydraulic reservoir.

    摘要翻译： 用于诸如液压挖掘机的超级液压工作机的液压驱动系统包括通过输送管线和供给管线连接到主线路的液压泵。 来自主线的分支部分包括用于允许液压流体从液压泵流向液压缸的流量控制阀。 液压油箱通过油藏管线和排油管线连接到主管线。 用于排水管线的其他分支部分包括流量控制阀，用于允许液压流体从液压缸流向液压储存器。 用于输送管线分支的管线包括旁通阀，用于以期望的流量将从液压泵输送的液压流体供应到供应管线，并将剩余的液压流体返回到液压储存器。

    Hydraulic control valve apparatus and hydraulic drive system
    2.
    发明授权
    Hydraulic control valve apparatus and hydraulic drive system 失效
    液压控制阀装置和液压驱动系统

    公开(公告)号：US5433076A

    公开(公告)日：1995-07-18

    申请号：US244038

    申请日：1994-05-16

    申请人： Genroku Sugiyama ,  Toichi Hirata ,  Yusaku Nozawa ,  Masami Ochiai

    发明人： Genroku Sugiyama ,  Toichi Hirata ,  Yusaku Nozawa ,  Masami Ochiai

    IPC分类号： E02F9/22 ,  F15B13/04 ,  F16D31/02 ,  F15B11/08

    CPC分类号： E02F9/2225 ,  F15B13/0417

    摘要： A hydraulic control valve apparatus including a flow control valve having a pair of variable throttles, a feeder passage, a pair of load passages, directional control valve devices comprise a seat valve having a seat valve body movably disposed in a housing to form an auxiliary variable throttle in the feeder passage, and a control variable throttle (33) formed in the seat valve body for changing an opening area in accordance with an amount of movement of the seat valve body; (b) a pilot line (24, 29-31, 35-37) for communicating a portion (7C) of the feeder passage upstream of the auxiliary variable throttle with a downstream portion (7A, 7B) of the feeder passage through the control variable throttle to determine the amount of movement of the seat valve body in accordance with a flow rate of the hydraulic fluid passing through the pilot line; and (c) pilot flow control (400; 401; 403; 405; 406; 407; 408) having a pilot variable throttle (45) disposed in the pilot line and input (800; 52-59; 159, 54-59; 231A, 231B, 251, 252) for receiving a flow restricting signal whereby an opening area of the pilot variable throttle is changed in accordance with the received flow restricting signal to control a flow rate of the hydraulic fluid passing through the pilot line.

    摘要翻译： PCT No.PCT / JP93 / 01558 Sec。 371日期1994年5月16日 102（e）日期1994年5月16日PCT提交1993年10月28日PCT公布。 公开号WO94 / 10456 日期：1994年5月11日。一种液压控制阀装置，包括具有一对可变节流阀的流量控制阀，进料通道，一对负载通道，方向控制阀装置，其包括座阀，该阀座具有可移动地设置在 在所述供给通道中形成辅助可变节流阀，以及形成在所述座阀主体中的控制可变节流阀（33），用于根据所述座阀主体的移动量来改变开口面积; （b）用于将辅助可变节流阀上游的供料通道的一部分（7C）与馈送通道的下游部分（7A，7B）通过控制通道的控制线（24,29-31,35-37） 可变节气门，以根据通过先导管线的液压流体的流量来确定座阀体的运动量; 以及（c）具有设置在所述先导管线中的先导可变节流阀（45）的输入（800; 52-59; 159,54-59;和（c））先导流量控制（400; 401; 403; 405; 231A，231B，251,252），用于接收流量限制信号，由此根据所接收的流量限制信号改变先导可变节流阀的开口面积，以控制通过先导管线的液压流体的流量。

    Pump capacity control device and valve device
    4.
    发明授权
    Pump capacity control device and valve device 失效
    泵容量控制装置和阀装置

    公开(公告)号：US06422009B1

    公开(公告)日：2002-07-23

    申请号：US09744308

    申请日：2001-01-23

    申请人： Yusaku Nozawa ,  Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Kinya Takahashi

    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。

    Control valve
    5.
    发明授权
    Control valve 失效
    控制阀

    公开(公告)号：US06408876B1

    公开(公告)日：2002-06-25

    申请号：US09601251

    申请日：2000-10-13

    申请人： Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi ,  Mitsuhisa Tougasaki

    发明人： Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi ,  Mitsuhisa Tougasaki

    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。

    Flow control system for hydraulic motors
    6.
    发明授权
    Flow control system for hydraulic motors 失效
    液压马达流量控制系统

    公开(公告)号：US4938022A

    公开(公告)日：1990-07-03

    申请号：US213107

    申请日：1988-06-29

    申请人： Toichi Hirata ,  Yusaku Nozawa

    发明人： Toichi Hirata ,  Yusaku Nozawa

    IPC分类号： E02F9/22 ,  F15B13/04

    CPC分类号： E02F9/2232 ,  E02F9/2225 ,  F15B13/0405 ,  Y10T137/87193

    摘要： In a hydraulic drive system, first and second flow control valves means comprise each: a main valve having a valve body for controlling communication between an inlet port and an outlet port both connected to a main circuit, a variable restrictor capable of changing an opening degree thereof in response to displacements of the valve body, and a back pressure chamber communicating with the outlet port through the variable restrictor and producing a control pressure to urge the valve body in the valve-opening direction; a pilot valve connected to a pilot circuit which is connected between the inlet port of and the back pressure chamber of the main valve; and an auxiliary valve connected to the pilot circuit for controlling a differential pressure between the inlet pressure and the outlet pressure of the pilot valve. The auxiliary valve is controlled such that the differential pressure between the inlet and outlet pressures of the pilot valve has a relationship expressed by a certain equation including predetermined constants .alpha., .beta. and .gamma., with respect to a differential pressure between the delivery pressure of a hydraulic pump and the maximum load pressure of first and second hydraulic actuators, a differential pressure between that maximum load pressure and the self-load pressure of each of the hydraulic actuators, and the self-load pressure, respectively.

    Unloading valve
    7.
    发明授权
    Unloading valve 失效
    卸载阀门

    公开(公告)号：US06681794B2

    公开(公告)日：2004-01-27

    申请号：US10031169

    申请日：2002-01-17

    申请人： Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi

    发明人： Mitsuhisa Tougasaki ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Kinya Takahashi

    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。

    Directional control valve with flow distribution valves
    8.
    发明授权
    Directional control valve with flow distribution valves 失效
    带分流阀的定向控制阀

    公开(公告)号：US5957159A

    公开(公告)日：1999-09-28

    申请号：US142870

    申请日：1998-09-17

    申请人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Nobuhiko Ichiki ,  Minoru Aoki

    发明人： Kinya Takahashi ,  Yoshizumi Nishimura ,  Yusaku Nozawa ,  Nobuhiko Ichiki ,  Minoru Aoki

    IPC分类号： E02F9/22 ,  F15B11/05 ,  F15B13/08

    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。

    Pressure control valve
    9.
    发明授权
    Pressure control valve 失效

    公开(公告)号：US4942900A

    公开(公告)日：1990-07-24

    申请号：US412491

    申请日：1989-09-26

    申请人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

    发明人： Yusaku Nozawa ,  Kazumasa Yuasa ,  Wataru Ootu ,  Kinya Takahashi

    IPC分类号： F16K17/04 ,  F15B11/00 ,  F16K17/10 ,  F16K31/363 ,  F16K31/383

    CPC分类号： F16K31/3835 ,  F16K17/105 ,  F16K31/363 ,  Y10T137/7764 ,  Y10T137/7765 ,  Y10T137/7769

    摘要： A pressure control valve has a main valve element of seat type slidably accommodated in a valve case for controlling communication between inlet and outlet sections of the valve case by movement of the main valve element, a control chamber defined within the valve case and between the valve case and an end face of the main valve remote from the outlet section for biasing the main valve element in a valve closing direction, and a variable restriction variable in its opening in response to the movement of the main valve element for communication between the control chamber and the inlet section of the valve case. There are provided first and second pilot lines for communication between the control chamber and the outlet section of the valve case, first and second pilot valve elements arranged respectively in the first and second pilot lines, a first valve drive unit operative in response to the pressure of the inlet section of the valve case for opening the first pilot valve element when the pressure reaches a first predetermined value, and a second valve drive unit operative in response to differential pressure between the pressure of the inlet section of the valve case and signal pressure introduced to a signal port for opening the second pilot valve element when the differential pressure reaches a second predetermined value.