The present disclosure relates to a forklift truck (101, 102, 1) in which a carriage moves up and down by a mast assembly in a multi-stage structure including an outer mast, a first inner mast accommodated in the outer mast and moving up and down, and a second inner mast accommodated in the first inner mast and moving up and down, the forklift truck (101, 102, 1) including a first lift cylinder (210) configured to move the first inner mast up and down;a second lift cylinder (220) configured to move the second inner mast up and down and having a pressure (P2) reception area less than a pressure (P2) reception area of the first lift cylinder (210);a first lift hydraulic line (610) configured to supply a hydraulic oil to the first lift cylinder (210);a second lift hydraulic line (620) connected to the first lift hydraulic line (610) and configured to supply a hydraulic oil to the second lift cylinder (220);and a pressure regulating valve (500, 550) installed on the first lift hydraulic line (610) and configured to increase a pressure (P2) of the hydraulic oil to a pressure (P2) capable of driving the second lift cylinder (220).


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    Title :

    FORKLIFT TRUCK


    Additional title:

    GABELSTAPLER
    CHARIOT ÉLÉVATEUR À FOURCHE


    Contributors:
    YI JUNIL (author)

    Publication date :

    2025-04-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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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