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公开(公告)号:US20070089408A1
公开(公告)日:2007-04-26
申请号:US11613697
申请日:2006-12-20
Applicant: YUTAKA TOJI
Inventor: YUTAKA TOJI
IPC: F16D31/02
CPC classification number: F15B20/008 , E02F9/2228 , E02F9/2235 , E02F9/226 , E02F9/2285 , E02F9/2296 , F15B11/165 , F15B20/00 , F15B21/08 , F15B2211/20553 , F15B2211/20576 , F15B2211/20584 , F15B2211/20592 , F15B2211/30505 , F15B2211/30525 , F15B2211/3056 , F15B2211/3111 , F15B2211/3127 , F15B2211/3144 , F15B2211/31511 , F15B2211/31576 , F15B2211/329 , F15B2211/355 , F15B2211/45 , F15B2211/5753 , F15B2211/63 , F15B2211/6346 , F15B2211/6355 , F15B2211/6653 , F15B2211/7053 , F15B2211/7058 , F15B2211/71 , F15B2211/8623 , F15B2211/8626 , F15B2211/87 , F15B2211/8752 , F15B2211/8755
Abstract: A hydraulic controller for working machine according to the present invention, which presupposes an electronic control system where an integrated bleed-off valve common to hydraulic actuators is used for bleed-off control and the bleed-off valve is controlled by the secondary pressure of a proportional solenoid valve controlled by a controller, is constituted to compensate supply of a pressure oil for the hydraulic actuators even if the secondary pressure of the proportional solenoid valve is stopped, by providing, at the bleed-off valve, a fail-safe position with a fail-safe path which opens with an opening having smaller area than an unload opening.
Abstract translation: 根据本发明的用于工作机的液压控制器,其预先假定电子控制系统,其中使用与液压致动器共用的集成泄放阀用于泄放控制,并且排放阀由第二压力 由控制器控制的比例电磁阀构成为补偿液压致动器的压力油的供给,即使在比例电磁阀的二次压力停止时,通过在泄放阀处设置故障安全位置, 一个故障安全的路径打开,开口面积小于卸载开口面积。