PROBLEM TO BE SOLVED: To provide a revolving drive device and a work machine with the same capable of imparting a preferred brake force to a revolving motor according to a control amount of a control lever even when a revolving speed of a revolving body changes and with improved operability in a revolving brake action.SOLUTION: A revolving drive device 100 comprises a revolving motor 20 for revolving a revolving body 10, a hydraulic pump 52, a control lever 56, a control valve 54, a brake valve 60 and a brake valve control part 83. The brake valve control part 83 switches a position of the brake valve 60 so that a differential pressure of the revolving motor 20 becomes a predetermined target pressure Pt according to a control amount that the control lever 56 receives when the control lever 56 receives a brake operation of the revolving motor 20 and enables a hydraulic oil to generate a pressure loss at the brake valve 60.SELECTED DRAWING: Figure 2

    【課題】旋回体の旋回速度が変化する場合であっても、操作レバーの操作量に応じた所望のブレーキ力を旋回モータに付与することが可能であり、旋回ブレーキ動作における操作性が向上した旋回駆動装置、およびこれを備えた作業機械を提供する。【解決手段】旋回駆動装置100は、旋回体10を旋回させる旋回モータ20と、油圧ポンプ52と、操作レバー56と、コントロールバルブ54と、ブレーキバルブ60と、ブレーキ弁制御部83と、を備える。ブレーキ弁制御部83は、操作レバー56が旋回モータ20のブレーキ操作を受けた場合に、旋回モータ20の差圧が、操作レバー56がうける操作量に応じた所定の目標圧Ptとなるように、ブレーキバルブ60の位置を切換え、ブレーキバルブ60において作動油に圧力損失を発生させる。【選択図】図2


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    Title :

    REVOLVING DRIVE DEVICE AND WORK MACHINE WITH THE SAME


    Additional title:

    旋回駆動装置、およびこれを備えた作業機械


    Contributors:

    Publication date :

    2018-11-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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