The invention provides a hydraulic jack device for a dragging pry. The hydraulic jack device comprises a supporting seat, a hydraulic oil cylinder, a hydraulic cylinder support, a dragging and prying support, a connecting rod and the like; the cylinder block of the hydraulic oil cylinder is hinged to the hydraulic cylinder support by use of an ear plate; the piston rod of the hydraulic oil cylinder is hinged to the supporting seat; one end of the connecting rod is hinged to the dragging pry, while the other end of the connecting rod is hinged to the supporting seat. The hydraulic cylinder support is reliably connected with a dragging pry by use of a pin shaft; the dragging pry support is welded on the dragging pry. The hydraulic oil cylinder is capable of jacking the dragging pry to a predetermined height to realize the connection with a trailer under the hydraulic effect, and pulls the dragging pry under the action of the connecting rod, and therefore, too large or small shifting distance of the dragging pry is prevented under the jacking inertia force, and the hydraulic oil cylinder is always vertical to jack up the dragging pry. During short-distance transportation, a welded chain on the supporting seat is suspended on the hydraulic cylinder support to protect the supporting seat and the piston rod from dropping due to the sudden relief of the hydraulic pressure. During long-distance transportation, the supporting seat, the hydraulic support, the connecting rod and the hydraulic oil cylinder can be entirely demounted from the dragging pry to reduce the width of the overall vehicle, and therefore, the passing convenience of the vehicle can be improved.


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    Title :

    Hydraulic jack device for dragging pry


    Contributors:
    WANG LONGTING (author) / XU XINGPING (author) / LIU CHUNHUA (author) / ZHANG XIN (author) / LIU GUANGDOU (author) / WANG YANZHE (author)

    Publication date :

    2015-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen



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