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    Control system for hydraulically-operated construction machinery
    1.
    发明授权
    Control system for hydraulically-operated construction machinery 失效
    液压施工机械控制系统

    公开(公告)号：US4697418A

    公开(公告)日：1987-10-06

    申请号：US904118

    申请日：1986-09-05

    申请人： Nobuya Okabe ,  Toichi Hirata ,  Kuniaki Yoshida ,  Genroku Sugiyama ,  Masakazu Haga ,  Hideaki Tanaka ,  Akira Tatsumi

    发明人： Nobuya Okabe ,  Toichi Hirata ,  Kuniaki Yoshida ,  Genroku Sugiyama ,  Masakazu Haga ,  Hideaki Tanaka ,  Akira Tatsumi

    IPC分类号： E02F9/22 ,  E02F9/20 ,  F15B9/04

    CPC分类号： E02F9/2246 ,  B60W10/06 ,  B60W10/30 ,  B60W30/188 ,  E02F9/2235 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  B60W2300/17 ,  B60W2510/0638 ,  B60W2510/30 ,  B60W2540/04 ,  B60W2710/0644 ,  B60W2710/30

    摘要： A control system for a hydraulic excavator having a prime mover, revolution number control device for the prime mover, at least one variable displacement hydraulic pump driven by the prime mover, displacement volume control device for the pump, actuators driven by pressurized fluid discharged from the pump and working elements driven by the respective actuators. The control system includes maximum revolution number altering device for the prime mover associated with the revolution number control device, maximum displacement volume altering device for the pump associated with the displacement volume control devices, devices for sensing the operation condition of the actuators, devices for selecting an operation mode for each working element and control devices. The maximum revolution number altering device provides at least one maximum revolution number of the prime mover and the maximum displacement volume altering device provides at least one maximum displacement volume so that maximum revolution numbers of the prime mover and maximum displacement volumes are arranged in a plurality of combinations. The plurality of combinations are set in association with the operation condition of the actuators and the selection of the operation mode. The control means selects a combination of the maximum revolution number of the prime mover and the maximum displacement volume of the pumps on basis of output signals of the sensors and selection devices and drives the maximum revolution number altering device and the maximum displacement volume altering device to set the maximum revolution number of the prime mover and the maximum displacement volume of the hydraulic pump.

    摘要翻译： 一种用于液压挖掘机的控制系统，具有用于原动机的原动机，转数控制装置，由原动机驱动的至少一个可变排量液压泵，用于泵的排量体积控制装置，由从 泵和工作元件由相应的致动器驱动。 控制系统包括与转数控制装置相关联的原动机的最大转数改变装置，与排量体积控制装置相关联的泵的最大排量变化装置，用于感测致动器的操作状态的装置，用于选择的装置 每个工作元件和控制装置的操作模式。 最大转数改变装置提供原动机的至少一个最大转速，并且最大排量改变装置提供至少一个最大排量，使得原动机和最大排量的最大转数排列成多个 组合。 多个组合与致动器的操作条件和操作模式的选择相关联地设置。 控制装置基于传感器和选择装置的输出信号选择原动机的最大转数与泵的最大排量之间的组合，并将最大转数改变装置和最大排量变更装置驱动到 设定原动机的最大转数和液压泵的最大排量。

    Hydraulic drive system for civil engineering and construction machine
    4.
    发明授权
    Hydraulic drive system for civil engineering and construction machine 失效
    公路工程施工机械液压驱动系统

    公开(公告)号：US5062350A

    公开(公告)日：1991-11-05

    申请号：US536545

    申请日：1990-07-12

    申请人： Hideaki Tanaka ,  Toichi Hirata ,  Genroku Sugiyama ,  Masakazu Haga ,  Yusuke Kajita

    发明人： Hideaki Tanaka ,  Toichi Hirata ,  Genroku Sugiyama ,  Masakazu Haga ,  Yusuke Kajita

    IPC分类号： E02F9/22

    CPC分类号： E02F9/2235 ,  E02F9/2228 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296

    摘要： A hydraulic drive system for a civil engineering and construction machine of the present invention comprises a hydraulic pump (11, 11A), a plurality of actuators (4-6) driven by a hydraulic fluid supplied from the hydraulic pump and including an arm cylinder (5) and a boom cylinder (4), a plurality of flow control valves (12, 14, 16) for controlling flows of the hydraulic fluid supplied to the respective actuators and including an arm directional control valve (14) and a boom directional control valve (12) and a plurality of distribution compensating valves (13, 15, 17; 13A, 15A, 17A) for controlling differential pressures across the respective flow control valves, the distribution compensating valves each having a first device (13d,15d, 17d; 13e, 13f, 15e, 15f, 17e, 17f) to set a target value of the differential pressure across the associated flow control valve. The present invention is featured in further comprising a first device (21) for detecting an arm crowding operation performed by driving of the arm cylinder (5), and a second device (24, 30, 31; 24, 30A, 31) for controlling the drive means (15d; 15f) of the distribution compensating valve (15; 15A) associated with the arm cylinder so as to reduce at least the target value of the differential pressure across the flow control valve (14) associated with the arm cylinder, when the arm crowding operation is detected.

    摘要翻译： PCT No.PCT / JP90 / 00375 Sec。 371日期1990年7月12日 102（e）日期1990年7月12日PCT 1990年3月29日PCT PCT。 公开号WO90 / 11413 日本1990年10月4日。本发明的土木工程机械的液压驱动系统包括液压泵（11,11A），由液压供给的液压流体驱动的多个致动器（4-6） 泵和包括臂缸（5）和动臂缸（4）;多个流量控制阀（12,14,16），用于控制供应到各个致动器的液压流体的流动，并包括臂方向控制阀（ 14）和用于控制横跨各个流量控制阀的压差的多个分配补偿阀（13,15,17; 13A，15A，17A）的动臂式方向控制阀（12）和分配补偿阀，分配补偿阀各自具有第一 装置（13d，15d，17d; 13e，13f，15e，15f，17e，17f），以设定跨过相关的流量控制阀的差压的目标值。 本发明的特征在于还包括：第一装置（21），用于检测通过所述手臂缸（5）的驱动进行的斗臂拥挤操作;以及第二装置（24,30,31; 24,30A，31），用于控制 与所述悬臂气缸相关联的所述分配补偿阀（15; 15A）的驱动装置（15d; 15f），以便至少将与所述手臂气缸相关联的所述流量控制阀（14）的差压的目标值减至最小， 当检测到胳膊拥挤操作时。

    Brake circuit apparatus for hydraulic motor
    5.
    发明授权
    Brake circuit apparatus for hydraulic motor 失效
    液压马达制动回路装置

    公开(公告)号：US4729222A

    公开(公告)日：1988-03-08

    申请号：US886040

    申请日：1986-07-16

    申请人： Hideaki Tanaka ,  Toichi Hirata ,  Genroku Sugiyama ,  Kuniaki Yoshida ,  Shinichi Mihara

    发明人： Hideaki Tanaka ,  Toichi Hirata ,  Genroku Sugiyama ,  Kuniaki Yoshida ,  Shinichi Mihara

    IPC分类号： F15B11/08 ,  E02F9/12 ,  E02F9/22 ,  F15B11/044 ,  F16D31/02

    CPC分类号： E02F9/2285 ,  E02F9/123 ,  E02F9/128 ,  E02F9/2221 ,  F15B11/0445 ,  F15B2211/20576 ,  F15B2211/3056 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/50527 ,  F15B2211/6355 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/715 ,  F16H61/4061

    摘要： The brake circuit apparatus for a hydraulic motor in a hydraulic circuit system having at least one main hydraulic pump, a hydraulic motor driven by a hydraulic fluid supplied from the main pump and having a rotary shaft, and a directional control valve actuated by an operation device for control of flow rate and flow direction of the hydraulic fluid supplied to the hydraulic motor from the main pump. The hydraulic motor is provided with a mechanical brake device having a brake release cylinder adapted to release the rotary shaft of the motor from the braking by the mechanical brake device by supply of a hydraulic fluid to the brake release cylinder. The apparatus further has an auxiliary hydraulic pump and a control circuit connected to the auxiliary pump, brake release cylinder and reservoir for control of fluid communication therebetween. The control circuit includes a hydraulic fluid supply line for receiving a hydraulic fluid supplied from the auxiliary hydraulic pump, a first line connected between the hydraulic fluid supply line and the brake release cylinder, and a second line connected between the hydraulic fluid supply line and the reservoir.

    摘要翻译： 一种用于液压回路系统中的液压马达的制动电路装置，具有至少一个主液压泵，由从主泵供给的具有旋转轴的液压流体驱动的液压马达和由操作装置致动的方向控制阀 用于控制从主泵供给到液压马达的液压流体的流量和流动方向。 液压马达设置有机械制动装置，其具有制动释放缸，其适于通过将液压流体供应到制动释放缸而通过机械制动装置从制动中释放马达的旋转轴。 该装置还具有辅助液压泵和连接到辅助泵，制动释放缸和储存器的控制电路，用于控制其间的流体连通。 控制电路包括用于接收从辅助液压泵供应的液压流体的液压流体供给管线，连接在液压流体供给管线和制动器释放缸之间的第一管路和连接在液压流体供给管线和制动器释放缸之间的第二管路 水库

    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures
    8.
    发明授权
    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures 失效
    压力补偿阀由压力接收区域负载和入口压力的差异定位

    公开(公告)号：US5152140A

    公开(公告)日：1992-10-06

    申请号：US640440

    申请日：1991-02-06

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    IPC分类号： E02F9/22 ,  F15B13/04

    CPC分类号： F15B13/0417 ,  E02F9/2232 ,  E02F9/2296 ,  Y10T137/7858

    摘要： A hydraulic drive system has a hydraulic pump (1), an actuator (2), a flow control valve (5) disposed between the hydraulic pump and the actuator, a pressure compensating valve (8; 8A; 8B) having a valve spool (23; 23A; 23B) that controls the differential pressure (Pz-PLS) across the flow control valve, and a pump delivery rate control device (9) for controlling a flow rate of the hydraulic fluid delivered from the hydraulic pump dependent on a differential pressure (Pd-PLS) between a pump pressure and a load pressure of the actuator. The pressure compensating valve has a first control chamber (30; 30A) subjected to the load pressure (PLS) of the actuator such that the load pressure acts on a first pressure receiving section (28; 28A) of the valve spool to urge the valve spool in the valve-opening direction, a second control chamber (29; 29A) subjected to the inlet pressure (Pz) of the flow control valve such that the inlet pressure acts on a second pressure receiving section (27; 27A) of the valve spool to urge the valve spool in the valve-closing direction, and a target differential pressure setting arrangement (31, 50, 51; 31B, 51) for urging the valve spool in the valve-opening direction. A damping capability to the actuator (2) is provided by setting pressure receiving area (Az) of the second pressure receiving section (27; 27A) to be greater than a pressure receiving area (ALS) of the first pressure receiving section (28; 28A).

    摘要翻译： PCT No.PCT / JP90 / 01310 Sec。 371日期1991年2月6日 102（e）日期1991年2月6日PCT 1990年10月11日PCT PCT。 出版物WO91 / 05958 日期：1991年5月2日。液压驱动系统具有液压泵（1），致动器（2），设置在液压泵和致动器之间的流量控制阀（5），压力补偿阀（8; 8A; 8B ）具有控制跨过流量控制阀的差压（Pz-PLS）的阀芯（23; 23A; 23B）和用于控制从所述流量控制阀输送的液压流体的流量的泵输送速率控制装置（9） 液压泵取决于泵压力和执行器的负载压力之间的压差（Pd-PLS）。 压力补偿阀具有受到致动器的负载压力（PLS）的第一控制室（30; 30A），使得负载压力作用在阀芯的第一压力接收部分（28; 28A）上，以推动阀 阀门处于阀打开方向，第二控制室（29; 29A）经受流量控制阀的入口压力（Pz），使得入口压力作用在阀的第二压力接收部分（27; 27A）上 阀芯沿阀关闭方向推压阀芯，以及用于沿阀打开方向推压阀芯的目标压差设定装置（31,50,51; 31B，51）。 通过将第二受压部分（27; 27A）的压力接收面积（Az）设定为大于第一压力接收部分（28; 27）的受压面积（ALS）来提供致动器（2）的阻尼能力。 28A）。

    Valve apparatus
    9.
    发明授权
    Valve apparatus 失效
    阀门装置

    公开(公告)号：US5140815A

    公开(公告)日：1992-08-25

    申请号：US427126

    申请日：1989-10-23

    申请人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    发明人： Genroku Sugiyama ,  Toichi Hirata ,  Hideaki Tanaka ,  Kazumasa Yuasa ,  Yusaku Nozawa

    IPC分类号： F15B13/04 ,  F16K15/18

    CPC分类号： F15B13/0405 ,  F16K15/18

    摘要： A hydraulic actuator is driven by hydraulic fluid discharged from a hydraulic pump, for controlling driving of the actuator. A valve has a meter-in circuit for introducing the hydraulic fluid discharged from the hydraulic pump into the actuator. The valve also has a meter-out circuit for returning fluid from the actuator, into a tank. The meter-out circuit is provided with a main valve for controlling the return fluid from the actuator, and a pilot circuit including a variable restrictor. When the main valve is closed, the pilot circuit is closed, and when the main valve is open, its degree of opening varies depending upon an amount of restriction of the variable restrictor. A controller varies the amount of restriction of the variable restrictor valve in accordance with the driving pressure of the actuator.

    摘要翻译： PCT No.PCT / JP89 / 00184 Sec。 371日期：1989年10月23日 102（e）日期1989年10月23日PCT提交1989年2月23日PCT公布。 第WO89 / 08213号公报。 日期1989年9月8日。液压致动器由从液压泵排出的液压流体驱动，用于控制致动器的驱动。 阀具有用于将从液压泵排出的液压流体引入致动器的计量回路。 阀还具有用于将流体从致动器返回到罐中的出口回路。 出口电路设置有用于控制来自致动器的返回流体的主阀和包括可变节流器的先导电路。 当主阀关闭时，先导电路关闭，当主阀打开时，其开度根据可变节流器的限制量而变化。 控制器根据致动器的驱动压力改变可变节流阀的限制量。

    Hydraulic driving apparatus
    10.
    发明授权
    Hydraulic driving apparatus 失效
    液压驱动装置

    公开(公告)号：US5083430A

    公开(公告)日：1992-01-28

    申请号：US439389

    申请日：1989-11-13

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusaku Nozawa

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B13/04

    CPC分类号： F15B11/165 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/3055 ,  F15B2211/3111 ,  F15B2211/324 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6051 ,  F15B2211/6054 ,  F15B2211/7053 ,  F15B2211/7135 ,  Y10T137/87193

    摘要： A hydraulic driving apparatus has at least one hydraulic pump, a plurality of hydraulic actuators driven by hydraulic fluid discharged from the hydraulic pump, a tank to which return fluid from the plurality of hydraulic actuators is discharged, and a flow control valve associated with each of the plurality of hydraulic actuators. The flow control valve has a first main variable restrictor for controlling flow rate of the hydraulic fluid supplied from the hydraulic pump to the hydraulic actuator, and a second main variable restrictor for controlling flow rate of the return fluid discharged from the hydraulic actuator to the tank. A pump control operative in response to the difference between the discharge pressure of the hydraulic pump and the maximum load pressure of the hydraulic actuators normally controls the discharge rate of the hydraulic pump so that the pump discharge pressure is raised more than the maximum load pressure by a predetermined value. A first pressure-compensating control operates with a valve determined by the difference between the pump discharge pressure and the maximum load pressure, the value acting as a compensating differential-pressure target value, and pressure-compensation-controls the first main variable restrictor of the flow control valve. A second pressure-compensating control is operative with a value determined by the pressure difference across the first main variable restrictor, the valve acting as a compensating differential-pressure target value, for controlling the second main variable restrictor of the flow control valve.