The invention discloses a forklift hydraulic lifting system and a forklift. The forklift hydraulic lifting system comprises a working pipeline. The working pipeline comprises a lifting oil cylinder, a hydraulic pump, a first electro-hydraulic proportional flow valve, a first electromagnetic directional valve, a lifting control valve and a hydraulic oil tank; one end of a valve core of the lifting control valve is connected with a control handle; the control handle is used for controlling the displacement of the valve core; a valve element displacement sensor is arranged at the position of the lifting control valve and is in signal connection with a first electro-hydraulic proportional flow valve, and the first electro-hydraulic proportional flow valve adjusts the flow of hydraulic oil according to displacement signals so as to control the descending speed of the lifting oil cylinder. By arranging the first electro-hydraulic proportional flow valve in the working pipeline, the effect of accurately controlling the descending speed of the lifting oil cylinder can be achieved, the stable descending speed of the lifting oil cylinder can be guaranteed under the condition of different loads, and the working stability and safety of the forklift are effectively improved.

    本发明公开一种叉车液压升降系统和叉车,包括:工作管路。所述工作管路包括:起升油缸、液压泵、第一电液比例流量阀、第一电磁换向阀、举升控制阀和液压油箱;举升控制阀的阀芯一端连接安装有操纵手柄,操纵手柄用于控制阀芯位移;举升控制阀处设置有阀芯位移传感器,阀芯位移传感器与第一电液比例流量阀信号连接,第一电液比例流量阀根据位移量信号调节液压油的流量大小,以控制起升油缸的下降速度。通过在工作管路中设置第一电液比例流量阀,能够达到精准控制起升油缸的下降速度的作用,使得起升油缸的下降速度在不同负载的情况下,均能够保证稳定的下降速度,有效提高了叉车工作的稳定性和安全性。


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    Title :

    Forklift hydraulic lifting system and forklift


    Additional title:

    叉车液压升降系统和叉车


    Contributors:
    SUN YAHAO (author) / TANG DAWEI (author) / WANG LIAOFENG (author) / DENG CHEN (author) / WANG AIHUA (author)

    Publication date :

    2024-09-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / 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 / F16K VALVES , Ventile



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