The invention discloses a jack. The jack consists of a lifting sleeve, a nut, a thrust bearing, a rocker arm, a gear, a square-head flat key, a round-head flat key, a screw, a shell and a base, wherein the screw is inserted in the shell; the round-head flat key is arranged on the screw; the square-head flat key sleeves the screw; concave and convex teeth arranged on the round-head flat key and the square-head flat key are gripped with each other; the gear is arranged on the right side of the square-head flat key; the thrust bearing is arranged on the top of the screw; the rocker arm is transversely inserted in the thrust bearing; the thrust bearing is inserted in the lifting sleeve and is fixed through the nut arranged on the right side of the lifting sleeve; and the base is arranged on the bottom of the shell. The jack is exquisite in structure and convenient to carry and can jack up tonnage heavy objects.


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    Title :

    Jack


    Contributors:
    HANG LONG (author)

    Publication date :

    2015-09-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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



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