PROBLEM TO BE SOLVED: To provide a work machine hydraulic transmission, for a work machine mounted with an exhaust gas treatment device using a reducing agent, which enables an emergency evacuation measure to be taken on an occurrence of serious abnormality in the exhaust gas treatment device causing engine output restriction while reliably blocking hydraulic drive of the work machine.SOLUTION: A hydraulic transmission comprises: a hydraulic pump 52; a hydraulic actuator 54; a control valve 56 which changes a flow rate of hydraulic oil from the hydraulic pump 52 to the hydraulic actuator 54 by receiving input of control pressure; a control pressure input switching section 66 which can switch between a permission state to permit the input of the control pressure and a blocking state to block the input thereof; an input switch control section 40; and a restoration command input section. The input switch control section 40 has a pump capacity control section 42 which controls pump capacity of the hydraulic pump 52. The pump capacity control section 42 puts the control pressure input switching section 66 into the blocking state when an engine is in a specific output restriction state and into the permission state when a restoration command is input.SELECTED DRAWING: Figure 2

    【課題】還元剤を用いる排ガス処理装置を備えた作業機械において、排ガス浄化装置の深刻な異常によるエンジン出力の制限時に油圧駆動を確実に阻止しつつも緊急避難を可能にする油圧駆動装置を提供する。【解決手段】油圧駆動装置は、油圧ポンプ52と、油圧アクチュエータ54と、制御圧の入力を受けて油圧ポンプ52から油圧アクチュエータ54への作動油の流量を変化させるコントロールバルブ56と、制御圧の入力を許容する許容状態と阻止する阻止状態とに切換えられる制御圧入力切換部66と、入力切換制御部40と、回復指令入力部と、を備える。入力切換制御部40は、油圧ポンプ52のポンプ容量を制御するポンプ容量制御部40と、を備える。ポンプ容量制御部40は、エンジン出力について特定制限状態にある場合に制御圧入力切換部66を阻止状態とするが、回復指令が入力された場合には許容状態にする。【選択図】図2


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    Titel :

    WORK MACHINE HYDRAULIC TRANSMISSION


    Weitere Titelangaben:

    作業機械の油圧駆動装置


    Beteiligte:
    SASAI SHINTARO (Autor:in) / TERASAKA JOJI (Autor:in) / TSURUMI TOSHIKI (Autor:in) / KIMITANI TSUKASA (Autor:in) / USUMOTO SHOTA (Autor:in)

    Erscheinungsdatum :

    2017-06-01


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    E02F Baggern , DREDGING / B66C Krane , CRANES / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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