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).
HYDRAULIC DRIVE DEVICE FOR INDUSTRIAL VEHICLE
HYDRAULIKANTRIEBSVORRICHTUNG FÜR EIN INDUSTRIEFAHRZEUG
DISPOSITIF D'ENTRAÎNEMENT HYDRAULIQUE DE VÉHICULE INDUSTRIEL
24.08.2022
Patent
Elektronische Ressource
Englisch
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 |