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    • 6. 发明授权
    • Hydraulic control valve
    • 液压控制阀
    • US5566716A
    • 1996-10-22
    • US456964
    • 1995-06-01
    • Yoshio TogashiKenji NakamuraHiroshi IwataMichisada SakamotoYutaka Yasuhara
    • Yoshio TogashiKenji NakamuraHiroshi IwataMichisada SakamotoYutaka Yasuhara
    • F16K31/12F15B13/042F16K31/44F16K31/62F15B13/02
    • F15B13/0422Y10T137/87064Y10T137/87233
    • A hydraulically operated control valve with a cam member that pivots toward one or the other side of the neutral position in response to an operating member. A pair of push rods each with a piston interposed between the cam member and one of a pair of spool valves. A casing is provided wherein the cam member is mounted in the casing upper portion. A pair of piston chambers, each having an oil chamber formed at the top by the piston and a damper chamber formed at the bottom by the piston, are formed in the casing lower portion. A throttle in each piston communicates fluid between the corresponding oil chamber and the damper chamber. A pair of spring chambers each contain a spool valve at the center thereof. A pair of casing partition members separate the piston chambers and the spring chambers, and are adapted so the push rods extend through the center thereof. A pair of damping springs energize the pistons in the direction of departing from the partition members. A pair of check valves included on the casing partition members enable the hydraulic oil to move from the spring chambers to the damper chambers and prevent the hydraulic oil from moving from the damper chambers to the spring chambers.
    • 一种液压操作的控制阀,其具有响应于操作构件向中立位置的一侧或另一侧枢转的凸轮构件。 一对推杆,每个推杆具有插入在凸轮构件和一对滑阀中的一个之间的活塞。 提供了一种壳体,其中凸轮构件安装在壳体上部。 在壳体下部形成有一对活塞室,每个活塞室具有由活塞顶部形成的油室和由活塞在底部形成的阻尼室。 每个活塞中的节流阀连通相应的油室和阻尼室之间的流体。 一对弹簧室在其中心处包含滑阀。 一对壳体分隔构件分离活塞室和弹簧室,并且使得推杆延伸穿过其中心。 一对阻尼弹簧在离开分隔构件的方向上激励活塞。 包括在壳体分隔构件上的一对止回阀使得液压油能够从弹簧室移动到阻尼室,并且防止液压油从阻尼室移动到弹簧室。