The invention discloses a two-way safety gear used for preventing a lift car from moving accidentally. The two-way safety gear is clamped on a guide rail and comprises an inner shell arranged in an inner cavity of an outer shell. A horizontal positioning screw and a first horizontal movable screw with an elastic piece are arranged between the outer shell and the inner shell. Flat gear bodies are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. An upper wedge gear body and a lower wedge gear body which are symmetrical about the horizontal middle line of the inner shell are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. Double wedge blocks which are symmetrical about the horizontal middle line of the inner shell are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. The double wedge blocks are connected with the inner shell through second horizontal movable screws with elastic pieces. Movable push-pull rods extending out of a horizontal pipe cavity of the inner shell are arranged on the portions, on the rear right sides of the double wedge blocks, in the inner cavity of the inner shell. The contact faces between the front ends of the movable push-pull rods and the double wedge blocks are inclined faces. The movable push-pull rods are connected with safety gear transmission mechanisms through horizontal pin shafts. The two-way safety gear is simple in structure, safe and reliable. The braking force of the two-way safety gear directly acts on the lift car and the guide rail. The two-way safety gear has the good short-distance and short-time braking effect for the accidental movement of the lift car.


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    Title :

    Two-way safety gear used for preventing lift car from moving accidentally


    Contributors:
    WEI XIAOBING (author) / YAN CHUNXI (author) / GU WANCHENG (author)

    Publication date :

    2015-11-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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