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实用新型
CN203640773U 一种气动马达先导换向装置 失效 - 权利终止

一种气动马达先导换向装置
摘要：
本实用新型公开了一种气动马达先导换向装置，包括先导阀体、气缸、气缸下盖和换向活塞。所述先导阀体上设置有进气孔、控制孔和排气孔三个通道，所述先导阀体内设置一先导阀杆，该先导阀杆上设置一环形槽。当先导阀杆处于关闭位置时，先导阀杆上的环形槽把先导阀体上的控制孔和进气孔连通；当先导阀杆处于开启位置时，先导阀杆上的环形槽把先导阀体上的控制孔和排气孔连通，换向活塞两端的压力失去平衡，从而使换向活塞实现换向。本实用新型的气动马达先导换向装置，换向动作灵敏、复位及时，可靠性高，故障率低，使用寿命长。
摘要（英）：

The utility model discloses a pneumatic motor pilot reversing device. The pneumatic motor pilot reversing device comprises a pilot valve body, a cylinder, a cylinder lower cover and a reversing piston, wherein the three channels of a gas-in hole, a control hole and a gas exhaust hole are formed in the pilot valve body, a pilot valve stem is arranged in the pilot valve body, and an annular groove is formed in the pilot valve stem. When the pilot valve stem is in a closed position, the control hole and the gas-in hole in the pilot valve body are communicated by the annular groove in the pilot valve stem. When the pilot valve stem is in an open position, the control hole and the gas exhaust hole in the pilot valve body are communicated by the annular groove in the pilot valve stem, and pressures at the two ends of the reversing piston are imbalanced, thereby realizing reversing of the reversing piston. The pneumatic motor pilot reversing device provided by the utility model has the advantages of flexible reversing action, timely resetting, high reliability, low failure rate and long service life.

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