To provide a hydraulic system of an industrial vehicle which enables reduction in the number of components and a component mounting space.SOLUTION: A hydraulic system 1 includes: an oil tank 5 which stores a working fluid; hydraulic pumps 6, 16 which suck the working fluid from the oil tank 5 and supplies the working fluid to a lift cylinder 9, a tilt cylinder 10, and a wet type brake unit 15; a brake valve 18 which controls the working fluid to be supplied to the wet type brake unit 15 according to an operation of a brake pedal 14; a working fluid cooler 19 which cools the working fluid; a cooling passage 20 in which the working fluid flows toward the working fluid cooler 19 and the working fluid cooled by the working fluid cooler 19 flows toward the wet type brake unit 15; and a charge valve 21 which switches between an accumulator oil passage 21a which blocks supply of the working fluid from the hydraulic pump 16 to the cooling passage 20 and a cooling oil passage 21b which allows the supply of the working fluid from the hydraulic pump 16 to the cooling passage 20.SELECTED DRAWING: Figure 1

    【課題】部品点数及び部品搭載スペースを削減することができる産業車両の油圧システムを提供する。【解決手段】油圧システム1は、作動油が貯留されるオイルタンク5と、作動油をオイルタンク5から吸い上げてリフトシリンダ9、ティルトシリンダ10及び湿式ブレーキユニット15に供給する油圧ポンプ6,16と、ブレーキペダル14の操作に応じて湿式ブレーキユニット15に供給される作動油を制御するブレーキバルブ18と、作動油を冷却する作動油クーラ19と、作動油が作動油クーラ19に向けて流れると共に作動油クーラ19により冷却された作動油が湿式ブレーキユニット15に向けて流れる冷却用流路20と、油圧ポンプ16から冷却用流路20への作動油の供給を遮断する蓄圧油路21aと、油圧ポンプ16から冷却用流路20への作動油の供給を許容する冷却油路21bとを切り換えるチャージバルブ21とを備える。【選択図】図1


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    Title :

    HYDRAULIC SYSTEM OF INDUSTRIAL VEHICLE


    Additional title:

    産業車両の油圧システム


    Contributors:

    Publication date :

    2021-04-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / 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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