The electric proportional control hydraulic system comprises an oil tank, an oil pump, an electric proportional multi-way valve, a lifting oil cylinder, an inclined oil cylinder, an accessory oil cylinder, a hydraulic steering gear and a steering oil cylinder, the electric proportional multi-way valve comprises a priority valve, an oil inlet of the priority valve is connected with the oil pump, and one oil outlet of the priority valve is connected with an oil supply way of the electric proportional multi-way valve; the other oil outlet of the priority valve is connected with an oil inlet of the hydraulic steering gear, a control signal input port of the priority valve is connected with a control signal output port of the hydraulic steering gear, and when the hydraulic steering gear controls steering action, the priority valve is controlled to act so as to adjust the opening degree of the two oil outlets of the priority valve. By means of the hydraulic control system, accurate automatic control during remote control or unmanned driving is achieved, the priority valve is arranged, the steering priority function is integrated, oil supply to other oil cylinders during steering is reduced, sufficient pressure oil is provided for steering, smooth steering is guaranteed, and the safety and reliability of the system are improved.

    本发明公开一种叉车电比例控制液压系统,包括油箱、油泵、电比例多路阀、起升油缸、倾斜油缸、属具油缸、液压转向器和转向油缸,电比例多路阀包括优先阀,优先阀的进油口连接油泵,优先阀的一个出油口连接电比例多路阀的供油油路,优先阀的另一个出油口连接液压转向器的进油口,优先阀的控制信号输入口连接液压转向器的控制信号输出口,液压转向器控制转向动作时,控制优先阀动作,以调节优先阀两个出油口的开度。实现远程遥控或者无人驾驶时的精确自动控制,并通过设置优先阀,集成转向优先功能,转向时减小为其他油缸的供油,为转向提供充足的压力油,保证转向顺利,提升系统安全性和可靠性。


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    Title :

    Electric proportional control hydraulic system of forklift


    Additional title:

    一种叉车电比例控制液压系统


    Contributors:
    LI JING (author) / ZHAI MINGCHAO (author) / LUO SHENG (author) / WANG YUTING (author) / RUAN JINGXUAN (author) / HE JINGQUAN (author)

    Publication date :

    2023-12-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    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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