发明名称 |
Control apparatus for hydraulic cylinder |
摘要 |
Cushion chambers ( 8 ) disposed in the vicinity of both ends of a hydraulic cylinder ( 1 ) to throttle inflow or outflow of an operating oil caused by a piston ( 5 ) moving close to a piston stroke end, pressure sensors ( 16, 17 ) to detect pressures in the cushion chambers ( 8 ), and a control valve ( 13 ) disposed in a passage to supply/drain the operating oil to and from oil chambers ( 6, 7 ) of the hydraulic cylinder ( 1 ) for varying a flow amount of the operating oil are provided. A controller ( 9 ) varies an opening degree of the control valve ( 13 ) within a piston stroke end range based upon outputs of the pressure sensors ( 16, 17 ), adjusts a cushion pressure and controls a moving speed of the piston ( 5 ). Thereby deceleration degrees of the piston ( 5 ) can be freely adjusted within the piston stroke end range based upon a change of the operating conditions of the hydraulic cylinder ( 1 ).
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申请公布号 |
US7387061(B2) |
申请公布日期 |
2008.06.17 |
申请号 |
US20060566869 |
申请日期 |
2006.12.05 |
申请人 |
HUSCO INTERNATIONAL, INC.;KAYABA INDUSTRY COMPANY, LTD. |
发明人 |
KOBATA HIROSHI;CHRISTIANSON ROLLIN C.;KOLBE CHRISTOPHER JOHN |
分类号 |
E02F9/22;F15B15/22;F01B31/12;F15B11/00;F15B11/048 |
主分类号 |
E02F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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