The invention discloses a hydraulic parking braking system of an electric forklift. The hydraulic parking braking system comprises a main oil supply path, a braking cylinder, a braking oil path and abraking valve block, wherein the main oil supply path is provided with a priority valve; a CF port of the priority valve is used for being connected to an oil inlet of a steering gear of the forklift;an EF port of the priority valve is used for being connected to an oil inlet of a multi-way valve of a forklift working system; the braking cylinder is used for performing parking braking of the forklift; the braking oil path is used for supplying hydraulic oil to the braking cylinder; an oil supply end of the braking oil path is connected to the CF port; the braking valve block is arranged in the braking oil path; and the braking valve block is used for controlling the action of the braking cylinder so that the braking cylinder can perform parking braking of the forklift or can be in an unlocking state. The hydraulic parking braking system of the electric forklift can supply the hydraulic oil to the braking cylinder without the need for an energy accumulator. Compared with the prior art,the hydraulic parking braking system eliminates the accumulator, thereby saving components and reducing the cost. Meanwhile, the hydraulic parking braking system is simplified in structure and reduced in size. The invention also discloses the electric forklift which comprises the hydraulic parking braking system.

    本发明公开了一种电动叉车液压驻车制动系统,包括:主供油路,主供油路设有优先阀,优先阀的CF口用于与叉车的转向器进油口连接,优先阀的EF口用于与叉车工作系统的多路阀进油口连接;用于对叉车进行驻车制动的制动缸;用于为制动缸提供液压油的制动油路,制动油路的供油端与CF口连接;设于制动油路的制动阀块,制动阀块用于控制制动缸动作,以使制动缸对叉车进行驻车制动或使制动缸处于解锁状态。该电动叉车液压驻车制动系统无需采用蓄能器为制动缸提供液压油,相比于现有技术,省去了蓄能器,节省了元器件,成本低;同时简化了结构,减小了体积。本发明还公开了一种包括上述电动叉车液压驻车制动系统的电动叉车。


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    Title :

    Hydraulic parking braking system of electric forklift and electric forklift


    Additional title:

    一种电动叉车液压驻车制动系统及电动叉车


    Contributors:
    ZHAI MINGCHAO (author) / YU JIANLIANG (author) / DONG QIAN (author) / CHEN JUN (author) / XIAO JUN (author) / WU YINGPING (author)

    Publication date :

    2020-05-15


    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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