To provide a hydraulic drive device capable of recovering positional energy of an object in a space-saving manner.SOLUTION: A hydraulic drive device 1 comprises: an operation valve 12 arranged between a hydraulic pump 6 and tank 9 and a lift cylinder 2; an accumulator 23 connected to a hydraulic fluid passage 20 connecting a suction port 6a of the hydraulic pump 6 and the lift cylinder 2, for accumulating hydraulic fluid from the lift cylinder 2; a pressure accumulation flow control valve 24 disposed in the hydraulic oil flow passage 20, for controlling the flow rate of hydraulic oil supplied to the accumulator 23; and a bypass flow control valve 22 disposed in a hydraulic oil flow passage 21 connecting the hydraulic oil flow passage 20 and the tank 9, for controlling the flow rate of hydraulic oil discharged to the tank 9, where a connection branch point A between the bypass flow control valve 22 and the hydraulic oil flow passages 20 and 21 is arranged inside the operation valve 12.SELECTED DRAWING: Figure 1

    【課題】省スペース化を図りつつ、昇降物の位置エネルギーを回収することができる油圧駆動装置を提供する。【解決手段】油圧駆動装置1は、油圧ポンプ6及びタンク9とリフトシリンダ2との間に配置された操作弁12と、油圧ポンプ6の吸込口6aとリフトシリンダ2とを接続する作動油流路20に接続され、リフトシリンダ2からの作動油を蓄圧するアキュムレータ23と、作動油流路20に配設され、アキュムレータ23に供給される作動油の流量を制御する蓄圧用流量制御弁24と、作動油流路20とタンク9とを接続する作動油流路21に配設され、タンク9に排出される作動油の流量を制御するバイパス用流量制御弁22とを備え、バイパス用流量制御弁22及び作動油流路20,21の接続分岐点Aは、操作弁12の内部に配置されている。【選択図】図1


    Access

    Download


    Export, share and cite



    Title :

    HYDRAULIC DRIVE DEVICE


    Additional title:

    油圧駆動装置


    Contributors:

    Publication date :

    2019-10-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    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



    HYDRAULIC DRIVE DEVICE

    TAKAHASHI KIWAMU / ISHIKAWA KOUJI / TSURUGA YASUTAKA et al. | European Patent Office | 2022

    Free access

    HYDRAULIC DRIVE DEVICE

    TAKAHASHI KIWAMU / ISHIKAWA KOUJI / TSURUGA YASUTAKA et al. | European Patent Office | 2019

    Free access

    HYDRAULIC DRIVE DEVICE

    OKADA ISAMU / YOSHIDA MAKOTO | European Patent Office | 2019

    Free access

    HYDRAULIC DRIVE DEVICE

    SAJI TSUNESHIRO / UEDA SUKENORI | European Patent Office | 2018

    Free access

    HYDRAULIC AXLE DRIVE DEVICE

    KAWATANI TETSUYA / SUGIMOTO HIROSHI / TSUKAMOTO MICHIO et al. | European Patent Office | 2020

    Free access