利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

356 条记录 (耗时 0.014 秒)

    HYDRAULIC CONTROL VALVE DEVICE AND HYDAULICALLY DRIVING DEVICE.
    45.
    发明公开
    HYDRAULIC CONTROL VALVE DEVICE AND HYDAULICALLY DRIVING DEVICE. 失效
    水力控制阀及供电设备HYDRUALISCH。

    公开(公告)号：EP0620370A4

    公开(公告)日：1995-04-19

    申请号：EP93923655

    申请日：1993-10-28

    申请人： HITACHI CONSTRUCTION MACHINERY

    发明人： SUGIYAMA GENROKU ,  HIRATA TOICHI ,  NOZAWA YUSAKU ,  OCHIAI MASAMI

    IPC分类号： E02F9/22 ,  F15B13/04 ,  F15B11/00 ,  F15B11/05 ,  F15B11/08 ,  F15B11/16

    CPC分类号： E02F9/2225 ,  F15B13/0417

    摘要： A hydraulic control valve device provided with spool type flow rate control valves (200A, 201A; 200; 204), wherein in order to control a flow rate of pressure oil supplied from a pump path (5) to a pair of main variable throttles (16A, 16B) through a feeder path (7) and to control a flow rate of pressure oil flowing into a pair of load paths (6A, 6B) in an auxiliary manner, direction changing-over valve devices (100A; 101A; 102A; 103A; 105A; 106A; 107A; 108A; 110A; 111A; 112A; 113A; 114A) comprises: (a) seat valves (300, 301) provided in the feeder path, having a seat valve body (20) movably provided in a housing (1) and forming an auxiliary variable throttle (28) in the feeder path and a variable control throttle (33) formed on the seat valve body, for varying an opening area in response to a distance of move of the seat valve body; (b) pilot lines (24, 29 - 31, 35 - 37) for allowing communication between the upstream side (7C) of the auxiliary variable throttle of the feeder path and the downstream sides (7A, 7B) of the feeder path through the variable control throttle to determine a distance of move of the seat valve body by a flow rate of pressure oil flowing through the above-described lines; and (c) pilot flow rate control valves (400; 401; 403; 405; 406; 407; 408) each having a pilot variable throttle (45) in a pilot line and means for receiving flow rate control signals to be input (800, 52 - 59, 159, 54 - 59, 231A, 231B, 251, 252), for varying an opening area of the pilot variable throttle in response to input flow rate control signals to thereby control flow rates of pressure oil flowing through the pilot lines.

    HYDRAULIC CIRCUIT SYSTEM
    48.
    发明公开
    HYDRAULIC CIRCUIT SYSTEM 失效
    HYDRAULIKKREISLAUF。

    公开(公告)号：EP0515692A1

    公开(公告)日：1992-12-02

    申请号：EP91920811.6

    申请日：1991-11-29

    申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

    发明人： KARAKAMA, Tadao, Kawasaki Factory of K.K.Komatsu ,  AKIYAMA, Teruo, Kawasaki Factory of K.K. Komatsu

    IPC分类号： F15B11/00 ,  F15B11/05 ,  F15B11/16 ,  E02F9/22

    CPC分类号： E02F9/2285 ,  E02F9/2225 ,  E02F9/2232 ,  E02F9/2235 ,  E02F9/2296 ,  F15B11/163 ,  F15B2211/20553 ,  F15B2211/25 ,  F15B2211/3054 ,  F15B2211/3111 ,  F15B2211/329 ,  F15B2211/50518 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/71

    摘要： A hydraulic circuit system wherein errors in flowrate distribution of pressure oil from a hydraulic pump to a plurality of hydraulic actruators can be reduced, supply of pressure oil can be quickly performed, a circuit configuration can be simplified and the system can be produced at low costs. The system comprises: a plurality of control valves (15) provided in circuits (10a, 17) connected between a hydraulic pump (10) and a plurality of hydraulic actuators (16); a plurality of pressure compensation valves (18) which can be set at the highest load pressure from among the load pressures acting on the respective hydraulic actuators; and load pressure detecting ports (37) connected to a load pressure introduction path (23) through a check valve (42) and provided on control valves (15) in a manner to detect intermediate pressures between pressures on the inlet sides and on the outlet sides of the respective pressure compensation valves (18) from within control valves when the respective control valves (15) are set at pressure oil supply positions (I or II). First pressure receiving portions (19) for pressing the pressure compensation valves (18) in the blocking directions are connected to a load pressure introduction path (23) in such a manner that load pressures can be detected at the ports from pressure oil inlet sides of the pressure compensation valves (18), and, on the other hand, second pressure receiving portions (21) for pressing the pressure compensation valves (18) in the communicating directions are connected to the pressure oil outlet side of the control valve (15).

    摘要翻译： 一种液压回路系统，其中可以减少从液压泵到多个液压执行器的压力油的流量分布误差，可以快速地提供压力油，可以简化电路配置并且可以以低成本生产系统 。 该系统包括：连接在液压泵（10）和多个液压致动器（16）之间的电路（10a，17）中的多个控制阀（15）。 多个压力补偿阀（18），其可以从作用在各个液压致动器上的负载压力中设定在最高负载压力; 以及通过止回阀（42）连接到负载压力引入路径（23）并且设置在控制阀（15）上的负载压力检测端口（37），以检测入口侧和出口之间的压力之间的中间压力 当各个控制阀（15）设置在压力供油位置（I或II）时，各个压力补偿阀（18）的侧面从控制阀内。 用于按阻力方向按压压力补偿阀18的第一压力接收部分19连接到负载压力引入路径23，使得能够在压力油入口侧的端口处检测负载压力， 压力补偿阀18和另一方面用于在连通方向上按压压力补偿阀18的第二压力接收部21连接到控制阀15的压力油出口侧。 。

    HYDRAULIC CIRCUIT SYSTEM
    49.
    发明公开
    HYDRAULIC CIRCUIT SYSTEM 失效
    HYDRAULIKKREISLAUFSYSTEM。

    公开(公告)号：EP0513360A1

    公开(公告)日：1992-11-19

    申请号：EP91916806.2

    申请日：1991-09-26

    申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

    发明人： AKIYAMA, Teruo, c/o Kawasaki Factory ,  ISHIZAKI, Naoki, c/o Kawasaki Factory ,  SHIRAI,Kiyoshi, c/o Kawasaki Factory ,  YAMASHITA, Koji, c/o Kawasaki Factory ,  SHINOZAKI, Shin-ichi, c/o Kawasaki Factory

    IPC分类号： F15B11/00 ,  F15B11/16 ,  F15B11/05

    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： A hydraulic circuit system capable of making the rise of the driving pressure slow and of preventing the hunting phenomenon even at the start of driving of a hydraulic actuator being high in inertia. The system comprises: a plurality of control valves (15) provided in a discharge piping (10a) of a hydraulic pump (10); and pressure compensating valves (18) respectively provided in pipings for connecting these control valves (15) to respective hydraulic actuators (16); wherein the respective pressure compensating valves (18) are set at the highest load pressure out of respective load pressures of the respective hydraulic actuators (16), and a pump discharge capacity is controlled by a change-over valve (14) actuated by the difference between a pump discharge pressure and a load pressure. A bypass piping (31) connected to a load pressure introducing path (30) for introducing the load pressure into the pressure receiving portion of the aforesaid change-over valve (14) is included, and this bypass piping (31) is connected to a tank through a bypass valve (32) being throttled in the inverse proportion to a change in the opening area of the control valve (15).

    摘要翻译： 能够使驱动压力上升缓慢的液压回路系统，即使是开始驱动惯性高的液压致动器，也能够防止振动现象。 该系统包括：设置在液压泵（10）的排放管道（10a）中的多个控制阀（15）; 和分别设置在管道中的压力补偿阀（18），用于将这些控制阀（15）连接到相应的液压致动器（16）; 其中相应的压力补偿阀（18）在相应的液压致动器（16）的各自的负载压力之下设定在最高负载压力，并且泵排出能力由通过差异致动的转换阀（14）来控制 在泵排出压力和负载压力之间。 包括连接到用于将负载压力引入上述转换阀（14）的压力接收部分的负载压力引入路径（30）的旁通管道（31），并且该旁通管道（31）连接到 通过旁通阀（32）以与控制阀（15）的开口面积的变化成反比的方式节流。