The invention discloses an overload limit alarming device and relates to the technical field of manufacturing of hydraulic cranes and dragging winches. The overload limit alarming device comprises a pressure relay arranged in a hydraulic oil path, and a middle-position switch and a audible and visual alarming element which are arranged on an operation handle; a normally closed contact of the pressure relay is connected with a coil of a first relay; a normally closed contact of the first relay is connected with a coil of the second relay; and a normally closed contact of the second relay is connected with a coil of an ascending electromagnetic directional valve. By virtue of the overload limit alarming device, the problems that when the overload limit alarming device of the hydraulic crane has a fault, the maintenance time is long and the efficiency is low can be solved.


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    Title :

    Overload limit alarming device


    Contributors:
    HU LING (author)

    Publication date :

    2015-05-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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