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    • 2. 发明公开
    • 유압 제어 장치
    • 液压控制装置
    • KR1020080055873A
    • 2008-06-19
    • KR1020087007847
    • 2007-03-26
    • 가부시키가이샤 도요다 지도숏키
    • 마츠자키다케하루나카지마시게토고바야시다케시
    • F15B11/04B66F9/22F15B11/044F15B11/05
    • F15B11/0413B66F9/22E02F9/2203E02F9/2225E02F9/2267F15B11/044F15B11/05F15B13/0402F15B2211/30545F15B2211/353F15B2211/40561F15B2211/47F15B2211/473F15B2211/7052Y10T137/87169
    • A hydraulic control apparatus (1) includes a switch valve (11) , a valve support chamber (35) , a flow control valve (12) movable therein, an on-off valve (13) movable within a communication path chamber (12a) located inside the flow control valve (12)', and a valve control device 14. The on-off valve (13) can open and shut off a communication path X between a cylinder line (32) and a switch valve line (33). A restrictor formed between the flow control valve (12) and a wall defining the valve support chamber (35) connects the cylinder line (32) and the communication path chamber (12a). The restrictor opening is changed in correspondence with movement of the flow control valve (12). When the switch valve (11) is located at the drainage position, the valve control device (14) applies a pilot pressure lower than the pressure in the cylinder line (32) to a back pressure chamber (12d) of the flow control valve (12) , thereby moving the on-off valve (13) in a direction for opening the communication path X.
    • 液压控制装置(1)包括开关阀(11),阀支撑室(35),可在其中移动的流量控制阀(12),可在连通路径室(12a)内移动的开关阀(13) 位于流量控制阀(12)'内的开关阀(13)和阀控制装置14.开关阀(13)可以打开和关闭气缸管线(32)和开关阀线(33)之间的连通路径X, 。 形成在流量控制阀(12)和限定阀支撑室(35)的壁之间的限流器连接气缸管线(32)和连通路径室(12a)。 限流器开度根据流量控制阀(12)的运动而改变。 当切换阀(11)位于排水位置时,阀控制装置(14)将低于气缸管线(32)中的压力的​​先导压力施加到流量控制阀的背压室(12d) 12),从而沿着打开连通路径X的方向移动开关阀(13)。