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公开(公告)号：US5188147A
公开(公告)日：1993-02-23
申请号：US611499
申请日：1990-11-13
CPC分类号： E02F9/2296 , E02F9/2225 , E02F9/2232 , F15B13/0417 , Y10T137/87169 , Y10T137/87185
摘要： A pressure compensating type hydraulic valve wherein a pressure compensation can be made according to the movement of the movable portion of a hydraulic actuator, and the movable portion of the actuator can be stopped against load pressure when it is located at its neutral position. This pressure compensating type hydraulic valve is arranged such that a spool (24) is moved in a valve hole (16) so as to allow a first actuating port (21) and a second actuating port (22) connected with pressure receiving chambers (13.sub.1, 13.sub.2), respectively, defined on both sides of a movable portion (13.sub.3) of a hydraulic actuator (13) to be selectively connected with or disconnected from a first pumping port and a second pumping port in which fluid under pressure discharged by a hydraulic pump (10) flows, through the intermediary of a first check valve (31) and a second check valve (32), respectively, both of which are preset at predetermined pressures, and either one of the actuating ports which is isolated from the pumping port is connected with either one of the tank ports (33.sub.1, 33.sub.2).
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2.发明授权
公开(公告)号：US5218897A
公开(公告)日：1993-06-15
申请号：US655351
申请日：1991-02-22
IPC分类号： E02F9/22 , F15B11/024 , F15B13/02
CPC分类号： F15B11/024 , E02F9/2221 , F15B13/021 , F15B2011/0243 , F15B2211/20546 , F15B2211/30505 , F15B2211/3054 , F15B2211/30555 , F15B2211/3058 , F15B2211/3111 , F15B2211/3133 , F15B2211/31529 , F15B2211/31576 , F15B2211/329 , F15B2211/6054 , F15B2211/75 , Y10T137/87185
摘要： This invention provides a hydraulic circuit apparatus for operating a work-implement actuating cylinder arranged such that, during an earth compacting operation using a bucket, a work implement or boom is lowered by its own weight, and during other operations, a part of the fluid under pressure in a lifting chamber of the actuating cylinder is supplied together with pressurized fluid discharged by a pump into a lowering chamber to increase the retracting speed of a piston rod in the work-implement actuating cylinder. The apparatus comprises a spool slidably inserted in a valve bore formed in an operating valve body so that it may be moved between a first actuating position, where a second port connected to the lowering chamber is communicated with a second tank port and a first port connected to the lifting chamber is communicated with a first pump port; and a second actuating position, where the second port is communicated with a second pump port and the first port is communicated with a first tank port. A regenerative fluid passage, including a check valve, is formed in the valve body so as to allow the first and second ports to communicate together.
摘要翻译： PCT No.PCT / JP90 / 00829 Sec。 371日期1991年2月22日 102（e）日期1991年2月22日PCT Filed 1990年6月26日PCT公布。 出版物WO91 / 00431 日本1991年1月10日。本发明提供了一种液压回路装置，用于操作工作台致动筒，其布置成使得在使用铲斗的地球压实操作期间，工件或吊杆由其自重降低，并且在其他 操作中，在致动缸的提升室中的压力下的一部分流体与由泵排出的加压流体一起供应到下降室中，以增加工作机构致动缸中的活塞杆的回缩速度。 该装置包括可滑动地插入形成在操作阀体中的阀孔中的阀芯，使得其可在第一致动位置和连接到下降室的第二端口与第二罐口连通的第一致动位置和连接的第一端口之间移动 所述升降室与第一泵口连通; 以及第二致动位置，其中所述第二端口与第二泵口连通，并且所述第一端口与第一罐口连通。 包括止回阀的再生流体通道形成在阀体中，以允许第一和第二端口连通在一起。
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3.发明授权Hydraulic circuit apparatus for supplying fluid under pressure into hydraulic cylinders for work implement 失效液压回路装置，用于将压力下的液体供给工作液压缸
公开(公告)号：US5279122A
公开(公告)日：1994-01-18
申请号：US38189
申请日：1993-03-29
CPC分类号： F15B11/165 , E02F9/2235 , E02F9/2296 , F15B11/163 , F15B2211/20523 , F15B2211/20553 , F15B2211/20592 , F15B2211/253 , F15B2211/40515 , F15B2211/40569 , F15B2211/41572 , F15B2211/428 , F15B2211/455 , F15B2211/6054 , F15B2211/6058 , F15B2211/6303 , F15B2211/6346 , F15B2211/7052 , F15B2211/71
摘要： This invention aims at providing a hydraulic circuit apparatus for supplying pressurized fluid into cylinders for a work implement arranged such that during normal operation of the work implement the flow rate of fluid discharged by a pump is controlled such that the difference between the discharge pressure of the pump and the load pressure is always kept constant, whilst during inching operation of the work implement the flow rate of fluid discharged by the pump is reduced. This circuit apparatus comprises a large diameter piston (9) for actuating a displacement regulating member (8) of a variable displacement pump (2) in a direction as to reduce the displacement of the pump; a small diameter piston (10) having pressure receiving chamber (10a) connected with discharge passage (2a) of the pump and adapted to actuate discharge regulating member (8) in a direction as to increase the displacement of the pump (2); a load sensing valve (11) for connecting or disconnecting pressure receiving chamber (9a) of the large piston (9) with or from the discharge passage; and apparatus (12, 13, 14) for applying a force to the load sensing valve to push its spool in a direction as to communicate the discharge passage (2a) of the pump with pressure receiving chamber (9a) of the large piston.
摘要翻译： 本发明的目的在于提供一种液压回路装置，用于将加压流体供应到用于工作工具的气缸中，该工作工具被布置为使得在工作的正常操作期间，控制由泵排出的流体的流量，使得排出压力 泵和负载压力始终保持恒定，而在工作的微动操作期间，减少了由泵排出的流体的流量。 该电路装置包括大直径活塞（9），用于在减小泵的排量的方向上致动可变排量泵（2）的排量调节构件（8）; 具有与所述泵的排出通道（2a）连接的压力接收室（10a）的小直径活塞（10），并且适于在增加所述泵（2）的位移的方向上致动排放调节构件（8）。 负载感测阀（11），用于将大活塞（9）的压力接收室（9a）与排出通道或从排出通道连接或断开; 以及用于向负载感测阀施加力以沿着使泵的排出通道（2a）与大活塞的压力接收室（9a）连通的方向推动其阀芯的装置（12,13,14）。
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公开(公告)号：US5212950A
公开(公告)日：1993-05-25
申请号：US882367
申请日：1992-05-06
IPC分类号： F15B13/042
CPC分类号： F15B13/0422
摘要： This invention provides a hydraulic circuit apparatus arranged such that when each of operating valves is operated suddenly, the stability of each of actuators is improved, and when the operating valves are kept at their neutral positions, the flow rate of fluid discharged by a variable displacement pump is increased to improve the response of the hydraulic circuit, and when the actuators are supplied with pressurized fluid, pressure compensation is made by pressure compensating valves. This hydraulic circuit apparatus comprises a bleed-off circuit (11) connecting the discharge passage (1a) of the variable displacement pump (1) with a fluid tank; a bleed-off valve (12) provided in bleed-off circuit (11) and adapted to be kept at its communicating position (I) when the operating valves (2) assume their neutral positions, and also kept at its shut-off position when the operating valves assume either their first fluid supply positions or their second fluid supply positions; and a flow restrictor (13) provided in the bleed-off circuit.
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公开(公告)号：US5209063A
公开(公告)日：1993-05-11
申请号：US877364
申请日：1992-05-04
CPC分类号： F15B11/165 , E02F9/22 , E02F9/2225 , F15B2211/20546 , F15B2211/253 , F15B2211/40569 , F15B2211/428 , F15B2211/455 , F15B2211/50518 , F15B2211/5153 , F15B2211/6054 , F15B2211/6057 , F15B2211/635 , F15B2211/71
摘要： A hydraulic circuit arranged to prevent the load pressure in one of the hydraulic actuators at the time of starting from becoming abnormally high thereby preventing fluid under pressure from being relieved by the safety valve when a plurality of hydraulic actuators are operated at the same time, wherein the function of one of the pressure compensating valves is temporarily enhanced by introducing the load pressure in the hydraulic actuator so as to supply a large quantity of fluid under pressure to the hydraulic actuator connected to the pressure compensating valve so that the operating speed of the hydraulic actuator can be increased. This hydraulic circuit comprises a compensation pressure selecting valve adapted to supply normally the highest load pressure to the spring chambers of the pressure compensating valves, and supply the load pressure in the hydraulic actuator connected to each of the pressure compensating valves to the spring chamber of each of the pressure compensating valves when either one of the operating valves is operated for the full stroke.
摘要翻译： PCT No.PCT / JP90 / 00667 Sec。 371日期：1991年4月9日 102（e）日期1991年4月9日PCT提交1990年5月24日PCT公布。 第WO90 / 14519号公报 日本1990年11月29日。一种液压回路，其布置成防止在启动时一个液压致动器中的负载压力变得异常高，从而当多个液压致动器为多个时，防止压力下的流体被安全阀释放 同时操作，其中通过将液压致动器中的负载压力引入到压力补偿阀中的一个压力补偿阀的功能，以便向连接到压力补偿阀的液压致动器供应大量压力流体，从而 可以提高液压执行器的运行速度。 该液压回路包括补偿压力选择阀，该补偿压力选择阀适于向压力补偿阀的弹簧室提供最高的负载压力，并将连接到每个压力补偿阀的液压致动器中的负载压力提供给每个压力补偿阀的弹簧室 的压力补偿阀，当操作阀中的任何一个操作全冲程时。
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公开(公告)号：US5477678A
公开(公告)日：1995-12-26
申请号：US839664
申请日：1992-02-14
CPC分类号： E02F9/2214 , F15B11/16 , F15B13/0417 , F15B2211/20546 , F15B2211/3054 , F15B2211/3111 , F15B2211/329 , F15B2211/6054 , F15B2211/71
摘要： In a hydraulic circuit system, when pressurized oil discharged from a single hydraulic pump is supplied to a plurality of actuators: the pressurized oil is supplied to heavily-loaded ones of the actuators at gradually reducing flow rates to reduce a shock, while supplied to lightly-loaded ones of the actuators at gradually increasing flow rates to increase working speeds of these lightly-loaded actuators. The hydraulic circuit system comprises a plurality of directional control valves (2) one of which is provided with pressure-compensated flow control valves (18) each of which is provided with a load lead-in passage having a restriction means (R). In addition, further comprised in the system are: relief valves (22, 22) for relieving the pressurized oil under the influence of load pressure of the actuators (3) operated by the directional control valves (2); a restriction orifice (24) provided in a drain side of each of the relief valves so as to produce pressure therein.
摘要翻译： 在液压回路系统中，当从单个液压泵排出的加压油被供给到多个致动器时：在逐渐减小流量的同时向加载的致动器供应压力油，以减少冲击，同时供给轻度 在逐渐增加的流量下执行器中的一个，以增加这些轻载驱动器的工作速度。 液压回路系统包括多个方向控制阀（2），其中一个方向控制阀设置有压力补偿流量控制阀（18），每个阀都设置有具有限制装置（R）的负载引入通道。 此外，该系统还包括：用于在由方向控制阀（2）操作的致动器（3）的负载压力的影响下释放加压油的安全阀（22,22）; 设置在每个安全阀的排水侧的限制孔（24），以在其中产生压力。
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公开(公告)号：US07549522B2
公开(公告)日：2009-06-23
申请号：US10579387
申请日：2005-09-13
CPC分类号： B60W30/18109 , B60T10/02 , B60W10/02 , B60W10/18 , F16D48/04 , F16D2048/0209 , F16D2048/0224 , F16D2048/0281 , F16D2048/0287 , F16D2500/1112 , F16D2500/70217 , F16D2500/70235
摘要： A device which can easily adjust a relationship between a clutch pressure of an input clutch and a braking force (brake pressure) generated by a brake device to a desired relationship by a simple structure, in which a draining oil passage which is branched from an oil passage for supplying a pressure oil to the input clutch is provided, and the draining oil passage is communicated with a tank. The draining oil passage is provided with a pressure reducing valve which increases the pressure oil flowing through the draining oil passage depending on the valve position to decrease a clutch pressure of the input clutch. A brake operating member is mechanically coupled with a valve operating member of the pressure reducing valve, and the valve operating member of the pressure reducing valve is mechanically coupled with a valve operating member of the brake control valve by, for example, a spring.
摘要翻译： 一种能够通过简单的结构容易地将输入离合器的离合器压力与由制动装置产生的制动力（制动压力）之间的关系调节到期望的关系的装置，其中从油分支的排水油通道 设置用于向输入离合器供给压力油的通道，并且排出油通道与罐连通。 排水油通道设置有减压阀，该减压阀根据阀位置增加流过排油通道的压力油，以降低输入离合器的离合器压力。 制动操作构件与减压阀的阀操作构件机械联接，并且减压阀的阀操作构件通过例如弹簧与制动控制阀的阀操作构件机械联接。
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8.发明授权Working vehicle, control device for working vehicle, and hydraulic oil amount control method for working vehicle 有权工作车辆，作业车辆控制装置以及工作车辆的液压油量控制方法公开(公告)号：US08725358B2
公开(公告)日：2014-05-13
申请号：US12736159
申请日：2009-03-11
CPC分类号： E02F9/2246 , E02F9/2235 , E02F9/2296
摘要： An object of the present invention is to prevent an unnecessary large amount of hydraulic oil from being supplied to a cylinder when a working vehicle capable of performing both a loading operation and a digging operation is performing the digging operation. When one or a plurality of first digging operation conditions are satisfied and when a second operation condition that it is not detected that the loading operation is being performed is also satisfied, a control unit executes fluid amount reduction control of reducing the amount of hydraulic oil supplied from a first pump to a cylinder that actuates a work equipment.
摘要翻译： 本发明的目的在于，当能够执行装载操作和挖掘操作的作业车辆正在进行挖掘操作时，防止不必要的大量液压油被供给到气缸。 当满足一个或多个第一挖掘操作条件时，并且当满足未检测到正在进行装载操作的第二操作条件时，控制单元执行减少供应的液压油量的流体量减少控制 从第一泵到致动工作设备的气缸。
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9.发明申请WORKING VEHICLE, CONTROL DEVICE FOR WORKING VEHICLE, AND HYDRAULIC OIL AMOUNT CONTROL METHOD FOR WORKING VEHICLE 有权车辆工作车辆，车辆工作控制装置及车辆液压油控制方法公开(公告)号：US20110040459A1
公开(公告)日：2011-02-17
申请号：US12736159
申请日：2009-03-11
IPC分类号： G06F19/00
CPC分类号： E02F9/2246 , E02F9/2235 , E02F9/2296
摘要： An object of the present invention is to prevent an unnecessary large amount of hydraulic oil from being supplied to a cylinder when a working vehicle capable of performing both a loading operation and a digging operation is performing the digging operation.When one or a plurality of first digging operation conditions are satisfied and when a second operation condition that it is not detected that the loading operation is being performed is also satisfied, a control unit executes fluid amount reduction control of reducing the amount of hydraulic oil supplied from a first pump to a cylinder that actuates a work equipment.
摘要翻译： 本发明的目的在于，当能够执行装载操作和挖掘操作的作业车辆正在进行挖掘操作时，防止不必要的大量液压油被供给到气缸。 当满足一个或多个第一挖掘操作条件时，并且当满足未检测到正在进行装载操作的第二操作条件时，控制单元执行减少供应的液压油量的流体量减少控制 从第一泵到致动工作设备的气缸。
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公开(公告)号：US20070125614A1
公开(公告)日：2007-06-07
申请号：US10579387
申请日：2005-09-13
IPC分类号： F16D67/04
CPC分类号： B60W30/18109 , B60T10/02 , B60W10/02 , B60W10/18 , F16D48/04 , F16D2048/0209 , F16D2048/0224 , F16D2048/0281 , F16D2048/0287 , F16D2500/1112 , F16D2500/70217 , F16D2500/70235
摘要： A device which can easily adjust a relationship between a clutch pressure of an input clutch and a braking force (brake pressure) generated by a brake device to a desired relationship by a simple structure, in which a draining oil passage which is branched from an oil passage for supplying a pressure oil to the input clutch is provided, and the draining oil passage is communicated with a tank. The draining oil passage is provided with a pressure reducing valve which increases the pressure oil flowing through the draining oil passage depending on the valve position to decrease a clutch pressure of the input clutch. A brake operating means is mechanically coupled with a valve operating member (spool) of the pressure reducing valve, and the valve operating member of the pressure reducing valve is mechanically coupled with a valve operating member (spool) of the brake control valve by, for example, a spring.
摘要翻译： 一种能够通过简单的结构容易地将输入离合器的离合器压力与由制动装置产生的制动力（制动压力）之间的关系调节到期望的关系的装置，其中从油分支的排水油通道 设置用于向输入离合器供给压力油的通道，并且排出油通道与罐连通。 排水油通道设置有减压阀，该减压阀根据阀位置增加流过排油通道的压力油，以降低输入离合器的离合器压力。 制动器操作装置与减压阀的阀操作构件（阀芯）机械联接，并且减压阀的阀操作构件与制动控制阀的阀操作构件（阀芯）机械联接，用于 例如，春天。
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