The invention belongs to the field of welding lifting platforms and particularly discloses a gear and rack lifting frame. The gear and rack lifting frame comprises a supporting base, a rack, a hydraulic cylinder and at least two rotating shafts. The rotating shafts are rotationally connected with the supporting base. A piston rod of the hydraulic cylinder is connected with the end of the rack. Each rotating shaft sequentially comprises a threaded part, a gear part and a rotating part from top to bottom. A nut is arranged on the upper portion of each rotating part. Each gear part is provided with a gear meshed with the rack. A ratchet wheel is installed on the rotating part of one rotating shaft. A pawl base is installed on the supporting base. A pawl matched with the ratchet wheel is installed on the pawl base.


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    Title :

    Gear and rack lifting frame


    Contributors:

    Publication date :

    2016-02-17


    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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