To provide a turning driving device that can ensure suppression of the entry of a turning body into a work limited area and issue an appropriate warning to an operator.SOLUTION: The turning driving device comprises: a neutral brake-type control valve 30 that is provided between a hydraulic pump 20 and a turning motor 22; a pilot pressure control unit 28 that controls pilot pressure applied to the control valve 30 to operation pilot pressure corresponding to a turning command operation applied to a turning operation member 26; a turning brake area setting unit 42 that sets a turning brake area before a work limited area; a pilot pressure limitation unit 40 that identifies limit pilot pressure which is the upper limit value of the pilot pressure for braking turning in the turning brake area; and a warning control unit 40 that causes a warning device 50 to start a warning operation at a point of time when a limit determination condition for determining that the pilot pressure is limited to the limit pilot pressure is satisfied, and reserve the warning operation until the limit determination condition is satisfied.SELECTED DRAWING: Figure 2

    【課題】作業制限領域内への旋回体の進入を確実に抑止し、かつ、オペレータに対して適正な警告を行う旋回駆動装置を提供する。【解決手段】旋回駆動装置は、油圧ポンプ20と旋回モータ22との間に介在する中立ブレーキ式のコントロールバルブ30と、コントロールバルブ30に与えられるパイロット圧を旋回操作部材26に与えられる旋回指令操作に対応した操作パイロット圧に制御するパイロット圧制御部28と、作業制限領域の手前側に旋回制動領域を設定する旋回制動領域設定部40と、旋回制動領域での旋回の制動のためのパイロット圧の上限値である制限パイロット圧を特定するパイロット圧制限部40と、パイロット圧が制限パイロット圧に制限されていることを判定するための制限判定条件が満たされた時点で警告装置50に前記警告動作を開始させ、制限判定条件が満たされるまでは警告動作を保留する警告制御部40と、を備える。【選択図】図2


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    Title :

    TURNING DRIVING DEVICE FOR TURNING-TYPE WORK MACHINE


    Additional title:

    旋回式作業機械の旋回駆動装置


    Contributors:
    HORI NAOTO (author) / INUKAI RYOTA (author) / KISHI TAKURO (author) / SUMIO TAISUKE (author)

    Publication date :

    2019-12-12


    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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