PROBLEM TO BE SOLVED: To enable the capacity of a variable displacement pump connected to a hydraulic circuit of a running system to be easily changed.SOLUTION: A hydraulic system of a working machine comprises: a prime mover; a variable displacement pump which is driven by power of the prime mover and has changeable capacity; an operation device having an operation member and an operation valve which can change a pressure of hydraulic fluid in accordance with operation of the operation member, and capable of changing the capacity of the variable displacement pump with the pressure of the hydraulic fluid changed by the operation valve; a running oil passage connecting the operation valve to the variable displacement pump; a discharge oil passage connected to the running oil passage and discharging the hydraulic fluid in the running oil passage; an actuation valve provided in the discharge oil passage and capable of reducing the pressure of the hydraulic fluid in the one oil passage; and a control device for controlling the actuation valve in accordance with rotational speed of the prime mover and a temperature of the hydraulic fluid.SELECTED DRAWING: Figure 1

    【課題】走行系の油圧回路に接続された可変容量ポンプの容量を簡単に変更することができるようにする。【解決手段】作業機の油圧システムは、原動機と、原動機の動力により駆動し且つ容量を変更可能な可変容量ポンプと、操作部材及び操作部材の操作に応じて作動油の圧力が変更可能な操作弁を有し、且つ操作弁で変更された作動油の圧力によって可変容量ポンプの容量を変更可能な操作装置と、操作弁と可変容量ポンプとを接続する走行油路と、走行油路に接続し且つ走行油路の作動油を排出する排出油路と、排出油路に設けられ且つ1油路における作動油の圧力を低減可能な作動弁と、原動機の回転数及び作動油の温度に応じて作動弁を制御する制御装置と、を備えている。【選択図】図1


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    Titel :

    HYDRAULIC SYSTEM OF WORKING MACHINE


    Weitere Titelangaben:

    作業機の油圧システム


    Beteiligte:
    FUKUDA YUJI (Autor:in)

    Erscheinungsdatum :

    2018-07-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    E02F Baggern , DREDGING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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