The invention discloses a center-hole type press-fitting propeller jack. The center-hole type press-fitting propeller jack comprises a cylinder body, a piston and O-shaped rings, a circular through hole is formed in the middle of the cylinder body, the cylinder body is composed of an inner cylinder wall, an outer cylinder wall and a cylinder bottom, the inner cylinder wall, the outer cylinder wall and the cylinder bottom of the cylinder body form a first annular groove with the visible end face, a communicating screw hole penetrating through the outer cylinder wall in the radial direction is formed in the bottom of the first annular groove, and the communicating screw hole can be connected with an external hydraulic pump; the piston is installed in the first annular groove, the piston is annular and is matched with the first annular groove in size, and a chamfer is arranged on the outer circle of the lower end face of the piston; and the O-shaped rings are arranged on the inner side wall and the outer side wall of the piston. The bottom of the piston is provided with a chamfer of 5 degrees * 30 degrees, the chamfer and other parts form an annular oil cavity, and the external hydraulic pump pumps oil to the cylinder body through the communicating screw hole. The center-hole type press-fitting propeller jack has the advantages of being simple in structure, convenient to operate and the like, the labor intensity of operators is obviously reduced, the working efficiency and the construction quality are improved, and the cost is also reduced.

    本发明公开一种穿心式压装螺旋桨千斤顶,其包括缸体,所述缸体中间设有圆形通孔,所述缸体由内缸壁、外缸壁和缸底组成,所述缸体的内缸壁、外缸壁和缸底组成一个端面可见的第一环形槽,所述第一环形槽底部设有一径向贯穿所述外缸壁的连通螺孔,所述连通螺孔可与外部液压泵连接;活塞,所述活塞安装于第一环形槽内,所述活塞为环状,且与第一环形槽大小相适配,所述活塞下端面外圆设有倒角;O型圈,所述O型圈设于活塞的内侧壁和外侧壁。活塞底部设置5*30°倒角与其他部件组成环形油腔,外部液压泵通过连通螺孔给缸体泵油,本发明具有结构简单、操作方便等特点,不仅明显降低了操作者的劳动强度、提高了工作效率及施工质量,还减少了成本。


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    Title :

    Center-hole type press-fitting propeller jack


    Additional title:

    一种穿心式压装螺旋桨千斤顶


    Contributors:
    SONG HAIPENG (author) / YANG JIAJIE (author) / LI JIMIN (author) / HE MINGCHUN (author) / LI HUAXIA (author)

    Publication date :

    2021-05-18


    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 / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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