To provide a hydraulic suspension device of a construction machine which has such a configuration as to supply pilot oil to a switch valve between a suspension cylinder and an accumulator, and suppresses increase in the size and complication.SOLUTION: In a hydraulic suspension device of a construction machine, hydraulic oil to a suspension cylinder is accumulated in a first accumulator, a switch valve is arranged in a flow channel connecting the suspension cylinder and the first accumulator. The switch valve enables switching of an operation status between an open state where the hydraulic oil can pass and a block state where the passage of the hydraulic oil is blocked, and the operation status is switched corresponding to a supply status of pilot oil. The pilot oil to the switch valve is accumulated in a second accumulator.SELECTED DRAWING: Figure 4

    【課題】サスペンションシリンダーとアキュムレータとの間の切替え弁へパイロット油を供給する構成の大型化及び複雑化が抑制される建設機械の油圧サスペンション装置を提供すること。【解決手段】建設機械の油圧サスペンション装置では、サスペンションシリンダーへの作動油が、第1のアキュムレータに蓄積され、サスペンションシリンダーと第1のアキュムレータとの間を接続する流路に、切替え弁が配置される。切替え弁は、作動油が通過可能な開放状態と作動油の通過を遮断する遮断状態との間で、作動状態が切替わり可能であり、パイロット油の供給状態に対応して作動状態が切替わる。切替え弁へのパイロット油は、第2のアキュムレータに蓄積される。【選択図】図4


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    Title :

    HYDRAULIC SUSPENSION DEVICE OF CONSTRUCTION MACHINE AND CONSTRUCTION MACHINE


    Additional title:

    建設機械の油圧サスペンション装置及び建設機械


    Contributors:

    Publication date :

    2022-04-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen



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