The invention discloses a stable amplitude variable pulley block. The stable amplitude variable pulley block comprises a pulley mounting bracket, a first pulley block and a second pulley block, wherein the first pulley block and the second pulley block are symmetrically arranged on the pulley mounting bracket; the pulley mounting bracket comprises four U-shaped steel plates; the U-shaped steel plates are overlapped in parallel to form three interlayers; each of the first pulley block and the second pulley block comprises a central shaft and three hot rolling pulleys which are arranged on the central shaft in a sleeving manner; the central shafts are vertically fixed on the pulley mounting bracket respectively; and the hot rolling pulleys are arranged in the three interlayers respectively. With the adoption of the manner, the first pulley block and the second pulley block of the stable amplitude variable pulley block are symmetrically arranged in parallel, and the central shafts and an inhaul cable keep vertical in a use process, so that the pulley mounting bracket is prevented from being overturned or inclined, and stress of the central shafts is relatively uniform; and the use is stable and reliable and the safety is high.


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    Title :

    Stable amplitude variable pulley block


    Contributors:
    JIN FUMIN (author)

    Publication date :

    2015-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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