The invention discloses a variable-amplitude auxiliary arm support of a crawler crane and the crawler crane. The variable-amplitude auxiliary arm support comprises a variable-amplitude auxiliary arm support body (9), a hoisting steel wire rope guide pulley block (10) and a variable-amplitude steel wire rope winding pulley block (11), wherein the hoisting steel wire rope guide pulley block (10) and the variable-amplitude steel wire rope winding pulley block (11) are arranged in the middle and the top of the variable-amplitude auxiliary arm support body respectively. The variable-amplitude auxiliary arm support body is of a variable-section double-supporting-leg box type structure composed of a first variable-amplitude auxiliary arm supporting leg (9-3) and a second variable-amplitude auxiliary arm supporting leg (9-4) which are arranged on the two sides respectively. The variable-section structural form is adopted, so that the self weight of the variable-amplitude auxiliary arm support is low, the generated overturning moment is small, the arm lifting difficulty of the whole crane is correspondingly lowered, and the hoisting performance of the overall crane can be correspondingly improved. Manufacturing cost and transport cost are reduced. The overturning angle of a variable-amplitude auxiliary arm can be delayed, and the design difficulty and cost for a back tipping prevention device can be reduced. Relative thrust provided by the back tipping prevention device is small, and damage to the variable-amplitude auxiliary arm is remarkably reduced.


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    Title :

    Variable-amplitude auxiliary arm support of crawler crane and crawler crane


    Contributors:
    ZHOU YULONG (author) / CHEN GUOLIANG (author) / ZUO QIWEI (author)

    Publication date :

    2015-12-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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