The invention provides a pawl type crawl device. The device is that a pawl chambers are symmetrically arranged at two sides of a crawl device frame; pawls are assembled into the pawl chambers and can float up and down; the bottom surfaces of the pawls are curved surfaces; pressing cover assemblies are mounted on the upper end surfaces of the pawl chambers; springs are mounted between the pawls and the pressing cover assemblies; strip-shaped holes are formed in the middle parts of the pawls; the inner ends of limiting bolts mounted at the outer sides of the paw chambers are inserted into the strip-shaped holes; U-shaped clamps are mounted at two sides of the front end and the rear end of the crawl device frame through connecting bolts; the bottom surfaces of the front end and the rear end of the crawl device frame are clamped to two sides of the upper end surface of a slide rail through the U-shaped clamps; the pawls are as wide as square holes in the upper end surface of the slide rail; the length between the bearing end and the non-bearing end of the bottom part of each pawl is more than the length of the square hole, so that the non-bearing ends are positioned on the upper end surface of the slide rail all the time while the pawls smoothly fall down into the square hole. With the adoption of the device, the time of pushing (pulling) the whole drilling machine or well repair machine can be greatly reduced; the working efficiency can be increased; the safety of workers in operation can be improved.


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    Title :

    Pawl type crawl device


    Contributors:
    CHEN CHAOQUAN (author) / WANG BING (author) / MA XIUFANG (author) / WU XIAOLIANG (author) / YANG XINLIN (author) / WANG XINGYAN (author)

    Publication date :

    2015-07-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren



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