The invention belongs to the technical field of hydraulic jacks and discloses a built-in hydraulic jack. The jack comprises a cylinder body, a piston rod (5) which is arranged in the cylinder body and axially slides relative to the cylinder body, a core axle (4) which is arranged in the piston rod (5), a chip (8) which is fixed in the cylinder body, an annular groove which is arranged on the surface of the piston rod (5), a cooper ring (9) which is fixedly connected in the annular groove and electrically connected with the chip (8), wherein the copper ring is fixed on the piston rod to integrate a sensor with an oil cylinder, the magnetic field can be sensed by the metal of the copper ring, the displacement and pressure data of the piston rod is transmitted to the chip by an electric wire, and furthermore the displacement and pressure data can be stored and recorder, the detection precision is increased, the copper ring and the chip are arranged in the jack, so as to prevent the copper ring and the chip from being contacted with the outer environment of the jack, and furthermore the damage of the displacement sensor is reduced.


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    Title :

    Built-in hydraulic jack


    Contributors:

    Publication date :

    2015-12-23


    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



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