The invention discloses a three-stage telescopic oil cylinder, and belongs to the technical field of development of hydraulic cylinders. The three-stage telescopic oil cylinder comprises a first-stage piston rod assembly, a second-stage piston rod assembly, a third-stage piston rod assembly and a cylinder barrel assembly; the second-stage piston rod assembly sleeves the outer circumferential surface of a three-stage piston rod of the three-stage piston rod assembly; the first-stage piston rod assembly sleeves the outer circumferential surface of a second-stage piston rod of the second-stage piston rod assembly; the cylinder barrel assembly sleeves the outer circumferential surface of a first-stage piston rod of the first-stage piston rod assembly; a clearance is formed between the end surface of an inner hole in the cylinder bottom of the cylinder barrel assembly, the non-boss tail end of the first-stage piston rod, the seconds-stage piston rod and a piston; the end surface of the inner hole in the cylinder bottom is closely clung to the boss end surface of the first-stage piston rod and the end surface of a cylinder barrel. According to the three-stage telescopic oil cylinder, the mode that oil channels are connected in series is adopted, so that the product is easily manufactured and easily dismounted; the application environment that the space is narrow and small, the structure is compact, and the travel and mounting distance and dimension are limited applies.


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    Title :

    Three-stage telescopic oil cylinder


    Contributors:
    SHI ZHANJUN (author) / LIU JIANKUI (author) / DU HAOBIN (author) / TANG RUI (author)

    Publication date :

    2015-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / 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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