The invention relates to the field of automobile steering pull rod systems, in particular to a power-assisted steering cylinder assembly with a stroke unloading valve. The power-assisted steering cylinder assembly with the stroke unloading valve comprises a cylinder body, a piston, a piston rod and the stroke unloading valve, and an inner cavity of the cylinder body is divided into a first oil cavity, a second oil cavity, a first side face of the piston and a second side face of the piston by the piston; one end of the piston rod is a telescopic end, and the other end of the piston rod extendsinto the second oil cavity to be connected with the second side face of the piston. The stroke unloading valve comprises a one-way valve, an ejector rod and a valve body cavity. The valve body cavityis provided with an opening formed in the first side face of the piston, a valve body containing cavity extending into the piston along the opening, and an oil channel penetrating through the first oil cavity and the second oil cavity. The one-way valve is installed in the valve body containing cavity, the ejector rod is arranged in the first oil cavity, when the ejector rod is separated from theone-way valve, the one-way valve closes the oil way, and when the ejector rod pushes the one-way valve, the one-way valve is communicated with the oil way. The piston stroke of the power-assisted steering cylinder can be controlled.

    本发明涉及汽车转向拉杆系统领域,尤其涉及一种具有行程卸荷阀的转向助力缸总成。本发明的具有行程卸荷阀的转向助力缸总成,包括缸体、活塞、活塞杆和行程卸荷阀,活塞将缸体的内腔分隔为第一油腔和第二油腔,活塞第一侧面和与第二侧面;活塞杆的一端为伸缩端,活塞杆的另一端伸入第二油腔内与所述活塞的第二侧面连接;行程卸荷阀包括单向阀、顶杆以及阀体腔,阀体腔具有开设在活塞第一侧面上的开口和沿开口向活塞内延伸的阀体容置腔以及贯通第一油腔和第二油腔的油道,单向阀安装在阀体容置腔中,顶杆设置在所述第一油腔中,顶杆与单向阀分离时,单向阀关闭油道,顶杆推动单向阀时,单向阀导通油道。本发明能够控制转向助力缸的活塞行程。


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    Title :

    Power-assisted steering cylinder assembly with stroke unloading valve


    Additional title:

    一种具有行程卸荷阀的转向助力缸总成


    Contributors:
    HE HAN (author) / DU XIYANG (author) / LI QIAN (author) / ZHANG TENGXIN (author) / CHENG TINGTING (author)

    Publication date :

    2020-10-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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