The invention provides a bottom lifting jack and a hydraulic support. The bottom lifting jack comprises a piston rod provided with a first arc structure at one end, and a cylinder body, wherein the piston rod are arranged in the cylinder body, and the piston rod and the cylinder body can relatively slide; and the first arc structure is located outside the cylinder body and at one end of the cylinder body, and a second arc structure is arranged at one end, far away from the first arc structure, of the cylinder body. According to the bottom lifting jack, the first arc structure is arranged at the end part of the piston rod outside the cylinder body, so that the top of the bottom lifting jack and a bottom lifting frame connected with the bottom lifting jack form arc surface contact, and damage caused by bending deformation of a hinged shaft of the bottom lifting jack and the bottom lifting frame due to stress is avoided. The second arc structure is arranged at one end, far away from the first arc structure, of the cylinder body, so that the cylinder body can be better contacted with a push rod. When the bottom lifting jack works, the piston rod and the cylinder body slide relatively,and when the bottom of the cylinder body is contacted with the push rod, the bottom lifting function is realized.

    本发明提出了一种抬底千斤顶和一种液压支架,其中,抬底千斤顶包括:活塞杆,活塞杆的一端设有第一圆弧结构;缸体,活塞杆设置于缸体内,活塞杆与缸体能够相对滑动;第一圆弧结构位于缸体的外部,位于缸体的一端,缸体远离第一圆弧结构的一端设有第二圆弧结构。本发明提供的抬底千斤顶通过在缸体外部的活塞杆端部设置第一圆弧结构,使抬底千斤顶顶部同与之相连接的抬底框架形成圆弧面接触,避免了抬底千斤顶与抬底框架的铰接轴因受力产生弯曲变形而损坏。缸体远离第一圆弧结构的一端设有第二圆弧结构,可以使缸体与推杆更好地接触。在抬底千斤顶工作时,活塞杆与缸体相对滑动,当缸体底部与推杆相接触时,实现抬底功能。


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    Title :

    Bottom lifting jack and hydraulic support


    Additional title:

    抬底千斤顶和液压支架


    Contributors:
    ZHU QINGBO (author) / SUN XIAOLIANG (author) / LIU JIAQI (author)

    Publication date :

    2020-07-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / E21D SHAFTS , Schächte



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