The invention discloses a split type automatic stroke unloading valve which comprises a rack piston, a limiting rod and an abutting spring. The rack piston is provided with an unloading hole, an unloading assembly is arranged in the unloading hole, and the unloading assembly comprises a pair of stroke valve seats and a pair of stroke valve rods; blind holes are formed in the opposite end faces of the two stroke valve rods; the two ends of the limiting rod are inserted into the blind holes correspondingly, the two blind holes form a limiting cavity for containing the limiting rod, and the length of the limiting cavity is larger than that of the limiting rod so that the limiting rod can move in the axial direction of the limiting cavity; the abutting spring is arranged on the limiting rod in a sleeving mode, the two ends of the abutting spring abut against the stopping parts of the stroke valve rod respectively, and a moving part partially penetrates out of a shaft hole through the abutting spring; guiding is carried out in the mode that the limiting rods are inserted into the stroke valve rod blind holes, the stroke valve rods at the two ends limit the limiting rod in the radial direction, and the disturbance of hydraulic oil to the limiting rod in the unloading process of the automatic stroke unloading valve can be relieved.

    本发明公开了一种分体式自动行程卸荷阀,包括具有卸荷孔的齿条活塞,卸荷孔内设置有卸荷总成,卸荷总成包括一对行程阀座,一对行程阀杆;两个行程阀杆相对的端面上均设置有盲孔;限位杆,限位杆的两端分别插接于盲孔内,两个盲孔形成容纳限位杆的限位腔,限位腔的长度大于限位杆的长度使得限位杆能够沿着限位腔轴向移动;和抵接弹簧,套设在限位杆上且抵接弹簧的两端分别与行程阀杆的止挡部抵接,抵接弹簧使得移动部部分的穿出轴孔;采用限位杆插入行程阀杆盲孔的方式进行导向,并且两端的行程阀杆对限位杆在径向有限位作用,可以减缓自动行程卸荷阀卸荷过程中液压油对限位杆的扰动。


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    Title :

    Split type automatic stroke unloading valve


    Additional title:

    一种分体式自动行程卸荷阀


    Contributors:
    CHEN YANGBIN (author) / MA YUANJIE (author)

    Publication date :

    2021-09-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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