To provide a hydraulic crane driving device capable of enhancing the degree of freedom of arrangement of directional control valves, and also controlling a manufacturing cost.SOLUTION: A supplementary directional control valve 58 is provided between a second hydraulic pump 48 and a jib derricking and supplementary hydraulic motor 12B. A jib derricking directional control valve 60 is provided between a first hydraulic pump 44 and the jib derricking and supplementary hydraulic motor 12B. A jib derricking and supplementary operation device 68 operates the directional control valve of one of the jib derricking directional control valve 60 and the supplementary directional control valve 58. An operation circuit switching valve 69 is provided between the jib derricking and supplementary operation device 68, and the jib derricking directional control valve 60 and the supplementary directional control valve 58. The operation circuit switching valve 69 performs switching whether to supply pilot pressure according to an operation of the jib derricking and supplementary operation device 68 to the jib derricking directional control valve 60 or to the supplementary directional control valve 58.SELECTED DRAWING: Figure 2

    【課題】方向制御弁の配置の自由度を向上することができ、かつ、製造コストを抑制することができる油圧クレーン駆動装置を提供する。【解決手段】補巻用方向制御弁58は、第2の油圧ポンプ48とジブ起伏兼補巻用油圧モータ12Bとの間に設けられている。ジブ起伏用方向制御弁60は、第1の油圧ポンプ44とジブ起伏兼補巻用油圧モータ12Bとの間に設けられている。ジブ起伏兼補巻用操作装置68は、ジブ起伏用方向制御弁60と補巻用方向制御弁58とのうちのいずれか一方の方向制御弁を操作する。操作回路切換弁69は、ジブ起伏兼補巻用操作装置68とジブ起伏用方向制御弁60および補巻用方向制御弁58との間に設けられている。操作回路切換弁69は、ジブ起伏兼補巻用操作装置68の操作に応じたパイロット圧を、ジブ起伏用方向制御弁60に供給するか補巻用方向制御弁58に供給するかを切換える。【選択図】図2


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    Titel :

    HYDRAULIC CRANE DRIVING DEVICE


    Weitere Titelangaben:

    油圧クレーン駆動装置


    Beteiligte:
    FUKUI AKIRA (Autor:in) / MIYAZAKI ITARU (Autor:in)

    Erscheinungsdatum :

    2021-01-28


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B66C Krane , CRANES



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