A hydraulic drive device for a cargo vehicle includes a first hydraulic cylinder for raising and lowering, a second hydraulic cylinder for performing an operation different from the first hydraulic cylinder, a first operation member, a second operation member, a hydraulic pump, an electric motor, a lowering oil path, an operation valve, a bypass oil path that branches off from the lowering oil path, a bypass flow rate control valve in the bypass oil path, a command rotational speed setting unit that sets a command rotational speed of the electric motor, and an electric motor control unit. A command rotational speed deceleration which is a deceleration of the command rotational speed set by the command rotational speed setting unit is larger than an actual rotational speed deceleration which is a deceleration of an actual rotational speed of the electric motor by the controlling output of the electric motor control unit.
HYDRAULIC DRIVE DEVICE FOR CARGO VEHICLE
2019-09-12
Patent
Electronic Resource
English
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 |