The invention discloses a small lifter which comprises a hydraulic motor, a lifting device and a constant moment gear device, wherein the hydraulic motor comprises a gear roller, the lifting device comprises a coiling roller, a steel rope and an objective table, and the constant moment gear device comprises a gear chuck, an elastic element and a cylindrical pin; the gear roller is connected with the coiling roller, and the steel rope connects the coiling roller with the objective table; the gear chuck is mounted on the gear roller, the elastic element is mounted on the inner wall of the coiling roller, and the cylindrical pin is mounted on the elastic element and connected with the gear chuck. According to the small lifter, when the weight of objects on the objective table is larger than elastic force, the cylindrical pin on the gear chuck can compress the elastic element, so that the gear chuck idles, the coiling roller does not rotate, the too large pre-tightening force is prevented, the hydraulic motor is prevented from being overloaded, and therefore the lifter is protected.


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    Title :

    Small lifter


    Contributors:

    Publication date :

    2016-01-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66D Haspeln , CAPSTANS



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