A hydraulic drive device (1) for an industrial vehicle (2) includes a tank (3), a hydraulic pump (4), a capacity control valve (5), a plurality of hydraulic cylinders (6, 8, 9), a plurality of direction switching valves (7,27, 31), a first hydraulic oil passage (12, 29, 33), a second hydraulic oil passages (16, 17, 18), a pilot line (19, 30, 34A, 34B), a relief valve (40), a relief pressure setting portion (40a, 41, 42), a plurality of operation detecting portions (51, 52),and a control unit (53). The control valve (5) controls the hydraulic pumps (4) so that a differential pressure between a discharge pressure of the hydraulic pump (4) and a pilot pressure of the pilot line (19) is to be a predetermined pressure. The control unit (53) controls the relief pressure setting portion (40a, 41, 42).


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    Title :

    HYDRAULIC DRIVE DEVICE FOR INDUSTRIAL VEHICLE


    Additional title:

    HYDRAULIKANTRIEBSVORRICHTUNG FÜR EIN INDUSTRIEFAHRZEUG
    DISPOSITIF D'ENTRAÎNEMENT HYDRAULIQUE DE VÉHICULE INDUSTRIEL


    Contributors:

    Publication date :

    2022-08-24


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



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