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HYDRAULIC SYSTEM FOR WORKING MACHINE AND CONTROL METHOD THEREOF
PROBLEM TO BE SOLVED: To secure safety at the time of failure of a working machine which can be operated by both ordinary control and remote control.SOLUTION: At the time of performing ordinary control, a controller causes an SOL 3 of a second pilot valve 2 to be excited and an operator operates an operation lever 11, which causes pilot pressure corresponding to an amount of lever operation to act from a first pilot valve 1 through a selection valve 4 to a control valve 3 to thereby drive a hydraulic actuator 10. When a working machine is in a safe condition at this time, the selection valve 4 is in a state of being excited and fully opened. At the time of performing remote control, the controller causes an SOL 4 of the second pilot valve 2 to be excited and an SOL 1 or SOL 2 of the selection valve 4 as a remote control target to be excited, which causes pilot pressure supplied from the second pilot valve 2 to act through the selection valve 4 to the control valve 3, to thereby drive the hydraulic actuator 10. The selection valve 4 is configured to block the pilot pressure to the control valve 3 when not being excited.SELECTED DRAWING: Figure 1
【課題】通常操作及び遠隔操作の両方が可能な作業機械の故障時における安全性を確保する。【解決手段】通常操作時には、第２パイロット弁２のＳＯＬ３を励磁し、操作レバー１１をオペレータが操作することで、レバー操作量に応じたパイロット圧が第１パイロット弁１から選択弁４を通ってコントロール弁３に作用し、油圧アクチュエータ１０が駆動する。この時、作業機械が安全な状態であれば、選択弁４は励磁された全開の状態である。遠隔操作時には、第２パイロット弁２のＳＯＬ４を励磁し、遠隔操作対象となる選択弁４のＳＯＬ１又はＳＯＬ２を励磁することで、第２パイロット弁２から供給されたパイロット圧が選択弁４を通ってコントロール弁３に作用し、油圧アクチュエータ１０が駆動する。選択弁４は、非励磁の場合にコントロール弁３へのパイロット圧を遮断するように構成されている。【選択図】図１
HYDRAULIC SYSTEM FOR WORKING MACHINE AND CONTROL METHOD THEREOF
PROBLEM TO BE SOLVED: To secure safety at the time of failure of a working machine which can be operated by both ordinary control and remote control.SOLUTION: At the time of performing ordinary control, a controller causes an SOL 3 of a second pilot valve 2 to be excited and an operator operates an operation lever 11, which causes pilot pressure corresponding to an amount of lever operation to act from a first pilot valve 1 through a selection valve 4 to a control valve 3 to thereby drive a hydraulic actuator 10. When a working machine is in a safe condition at this time, the selection valve 4 is in a state of being excited and fully opened. At the time of performing remote control, the controller causes an SOL 4 of the second pilot valve 2 to be excited and an SOL 1 or SOL 2 of the selection valve 4 as a remote control target to be excited, which causes pilot pressure supplied from the second pilot valve 2 to act through the selection valve 4 to the control valve 3, to thereby drive the hydraulic actuator 10. The selection valve 4 is configured to block the pilot pressure to the control valve 3 when not being excited.SELECTED DRAWING: Figure 1
【課題】通常操作及び遠隔操作の両方が可能な作業機械の故障時における安全性を確保する。【解決手段】通常操作時には、第２パイロット弁２のＳＯＬ３を励磁し、操作レバー１１をオペレータが操作することで、レバー操作量に応じたパイロット圧が第１パイロット弁１から選択弁４を通ってコントロール弁３に作用し、油圧アクチュエータ１０が駆動する。この時、作業機械が安全な状態であれば、選択弁４は励磁された全開の状態である。遠隔操作時には、第２パイロット弁２のＳＯＬ４を励磁し、遠隔操作対象となる選択弁４のＳＯＬ１又はＳＯＬ２を励磁することで、第２パイロット弁２から供給されたパイロット圧が選択弁４を通ってコントロール弁３に作用し、油圧アクチュエータ１０が駆動する。選択弁４は、非励磁の場合にコントロール弁３へのパイロット圧を遮断するように構成されている。【選択図】図１
HYDRAULIC SYSTEM FOR WORKING MACHINE AND CONTROL METHOD THEREOF
作業機械の油圧システム及びその制御方法
SAKURAI HITOSHI (author) / TERASAKA JOJI (author) / SHIMOMURA KOICHI (author)
2017-04-06
Patent
Electronic Resource
Japanese
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