The invention discloses a jack with the overlaying stroke lengthening function. The jack comprises a first fixed seat, a first hydraulic cylinder and a first hydraulic pump. The first hydraulic cylinder and the first hydraulic pump are arranged on the first fixed seat. The first hydraulic pump and the first hydraulic cylinder are connected for lifting drive. A second fixed seat parallel to the first fixed seat is arranged below the first fixed seat. The second fixed seat is provided with a second hydraulic cylinder and a second hydraulic pump. The top of the second hydraulic cylinder is connected with the bottom of the first fixed seat. In this way, by means of the jack with the overlaying stroke lengthening function, the first fixed seat can be separated from the second fixed seat and independently works, when the stroke of the first hydraulic cylinder cannot meet use requirements, the second fixed seat can be overlaid below the first fixed seat, the height of the first fixed seat is adjusted through the second hydraulic cylinder, multi-height stroke lengthening is achieved, hoisting stability is good, and working efficiency is high.


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    Title :

    Jack with overlaying stroke lengthening function


    Contributors:

    Publication date :

    2016-01-27


    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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