PROBLEM TO BE SOLVED: To realize a turning control device for coping with a neutral free system turning operation method, and also having the restriction function of a turning range.SOLUTION: A turning control device comprises a control valve having a neutral free position and interposed in an oil passage between a hydraulic pump and a turning hydraulic motor, a turning operation device for controlling a rotational speed and the rotational direction of the turning hydraulic motor by operating the control valve, a turning state detection device for detecting a turning state of a turning body, a turning restriction position setting device for setting a turning restriction position of the turning body, a braking hydraulic device for operating the control valve so as to generate hydraulic brake force in a return side oil passage of the turning hydraulic motor when determining that the turning body is a turning state of approaching the turning restriction position based on a detection result of the turning state detection device and a control device for controlling the braking hydraulic device.SELECTED DRAWING: Figure 2
【課題】中立フリー方式の旋回操作方法に対応し、かつ、旋回範囲の制限機能を備える旋回制御装置を実現する。【解決手段】旋回制御装置は、中立フリー位置を有し油圧ポンプと旋回油圧モータとの間の油路に介挿される制御弁と、制御弁を操作して旋回油圧モータの回転速度と回転方向を制御する旋回操作装置と、旋回体の旋回状態を検出する旋回状態検出装置と、旋回体の旋回制限位置を設定する旋回制限位置設定装置と、旋回状態検出装置の検出結果に基づいて旋回体が旋回制限位置に近づく旋回状態であることが判定されているときは、旋回油圧モータの戻り側油路に油圧ブレーキ力が発生するよう制御弁を操作する制動用油圧装置と、制動用油圧装置を制御する制御装置とを備える。【選択図】図2
TURNING CONTROL DEVICE AND WORK MACHINE
旋回制御装置および作業機械
2016-12-28
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |
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