A hydraulic control device for a forklift includes: a plurality of hydraulic mechanisms including a lifting/lowering hydraulic cylinder and a tilting hydraulic cylinder; a hydraulic pump; an electric motor; a discharge control mechanism; a proportional valve; a flow rate control valve; and a controller. When the lifting/lowering hydraulic cylinder performs a lowering operation of the fork and a hydraulic mechanism other than the lifting/lowering hydraulic cylinder simultaneously performs a further operation, the controller controls an open degree of the proportional valve in accordance with a rotation speed difference of a required lowering operation rotation speed for the hydraulic pump, which is required to perform the lowering operation at an instructed speed that is in accordance with an operation amount of the lifting/lowering control member, and a required further operation rotation speed for the hydraulic pump, which is required to perform the further operation.


    Access

    Download


    Export, share and cite



    Title :

    HYDRAULIC CONTROL DEVICE FOR FORKLIFT


    Additional title:

    HYDRAULIKSTEUERUNGSVORRICHTUNG FÜR EINEN GABELSTAPLER
    DISPOSITIF DE COMMANDE HYDRAULIQUE POUR ÉLÉVATEUR À FOURCHE


    Contributors:

    Publication date :

    2016-01-06


    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



    Hydraulic control device for forklift

    UEDA YUKI / MATSUO TSUTOMU / ISHIKAWA HIROHIKO et al. | European Patent Office | 2017

    Free access

    HYDRAULIC CONTROL DEVICE FOR FORKLIFT

    UEDA YUKI / MATSUO TSUTOMU / UNO TAKASHI et al. | European Patent Office | 2015

    Free access

    HYDRAULIC CONTROL DEVICE FOR FORKLIFT

    European Patent Office | 2016

    Free access

    Hydraulic control device for forklift

    UEDA YUKI / MATSUO TSUTOMU / UNO TAKASHI et al. | European Patent Office | 2018

    Free access

    HYDRAULIC CONTROL DEVICE FOR FORKLIFT

    UEDA YUKI / MATSUO TSUTOMU / UNO TAKASHI et al. | European Patent Office | 2016

    Free access