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    • 91. 发明专利
    • Direction control valve system and direction control valve system block furnished with plurality of direction control valve system
    • 方向控制阀系统和方向控制阀系统组件与多个方向控制阀系统
    • JP2008202724A
    • 2008-09-04
    • JP2007041023
    • 2007-02-21
    • Hitachi Constr Mach Co Ltd日立建機株式会社
    • TOUGASAKI MITSUHISAUENO KATSUMI
    • F15B11/16F16K11/07F16K13/00F16K15/18F16K27/00
    • F15B13/0417F15B13/0405F15B2211/40515F15B2211/41509F15B2211/428F15B2211/455Y10T137/2625Y10T137/7922Y10T137/86549Y10T137/86558Y10T137/87185Y10T137/87917
    • PROBLEM TO BE SOLVED: To provide a direction control valve system hard to cause a flow in pressure oil to generate pressure while a check valve to control a flow rate of the pressure oil to be lead to a direction control valve which is a main valve and a control means to restrict opening of this check valve by pressure are integrated with the direction control valve. SOLUTION: The control means has; a pressure chamber 24 to apply pressure to a valve element 21 of the check valve 20; an oil chamber 39 in the circumference of the valve element 21; a groove 40 formed in the valve element 21 connecting the oil chamber 39 and the pressure chamber 24 to each other; a control valve 25 directly connected to a branch part 17 continued to a sliding hole of the direction control valve and the oil chamber 39 and capable of communicating/shutting off the branch part 17 and the oil chamber 39 to and from each other and changing opening; a passage 42 in the valve element; a control groove 51 of an outer peripheral surface of the valve 21 communicating the passage 42 in the valve element and the oil chamber 39 with each other and; a spring-return type auxiliary check valve 43 to allow inflow of the pressure oil to the passage 42 in the valve element from a supply passage 15. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种方向控制阀系统,其难以在压力油中产生压力而产生压力,而止回阀控制压力油的流量导致方向控制阀,该方向控制阀为 主阀和通过压力限制该止回阀打开的控制装置与方向控制阀一体化。

      解决方案:控制装置具有 压力室24,向止回阀20的阀体21施加压力; 在阀元件21的圆周上的油室39; 形成在阀芯21中的槽40,其将油室39和压力室24彼此连接; 直接连接到分支部17的控制阀25,该分支部17连续地连接到方向控制阀和油室39的滑动孔,并且能够使分支部17和油室39相互连通/关闭,并且改变开口 ; 阀元件中的通道42; 阀21的外周面的控制槽51将阀元件中的通路42和油室39彼此连通; 弹簧复位式辅助止回阀43,用于允许压力油从供给通道15流入阀元件中的通道42。版权所有(C)2008,JPO&INPIT