A hydraulic system (1) is provided with: a variable displacement steering pump (21) that supplies a hydraulic fluid to a steering actuator (11); a variable capacity type loading/unloading pump (31) for supplying the operating fluid to the at least one loading/unloading actuator (12); and a converging line (71) branched from the diverting supply line (22) and connected to the loading/unloading supply line (32). The hydraulic system (1) is further provided with: a loading/unloading regulator (5) that inputs a loading/unloading request command pressure and that increases the capacity of the loading/unloading pump (31) as the loading/unloading request command pressure increases; and a steering regulator (4) to which the higher one of the steering load pressure and the loading/unloading load pressure is input as a load sensing pressure, and which controls the capacity of the steering pump (21) such that the pressure difference between the load sensing pressure and the discharge pressure of the steering pump (21) is constant.
液压系统(1)包括:向转向致动器(11)供给工作液的可变容量型的转向泵(21);向至少一个装卸致动器(12)供给工作液的可变容量型的装卸泵(31);和从转向供给线路(22)分支并与装卸供给线路(32)相连的合流线路(71)。此外,液压系统(1)包括:输入装卸要求指令压且装卸要求指令压越大则装卸泵(31)的容量越增加的装卸调节器(5);和转向调节器(4),转向负载压和装卸负载压中较高的一方作为负载传感压输入,以使所述负载传感压和转向泵(21)的吐出压的压力差为一定的形式控制转向泵(21)的容量。
Hydraulic system of industrial vehicle
工业车辆的液压系统
2024-05-28
Patent
Electronic Resource
Chinese
IPC: | E02F Baggern , DREDGING / 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 / B62D MOTOR VEHICLES , Motorfahrzeuge |