INSTANT LOWERING PREVENTIVE DEVICE FOR HYDRAULIC WINCH,申请号JP20020062951-传众专利搜索

INSTANT LOWERING PREVENTIVE DEVICE FOR HYDRAULIC WINCH

申请公布号：JP2003261289(A)

申请号：JP20020062951

申请日期：2002.03.08

申请公布日期：2003.09.16

申请人：

KOBELCO CONTSTRUCTION MACHINERY LTD

发明人：EBARA MASAAKI;SANTO KOJI

分类号：B66D1/54;B66D5/26;(IPC1-7):B66D1/54

主分类号：B66D1/54

摘要：PROBLEM TO BE SOLVED: To provide an instant lowering preventive device for securing proper motor holding pressure with simple constitution. SOLUTION: This hydraulic winch has a winch drum braked by a brake, a hydraulic winch motor 1 for rotatably driving this winch drum, a hydraulic pump 7 as a driving source of this winch motor 1, a control valve 6 for supplying pressure oil to the winch motor 1 via a pipe by controlling the direction and a flow of the pressure oil from the hydraulic pump 7, a remote control valve 8 for operating the control valve 6, and a counter balance valve 13 for holding pressure of the pipe at winch drum stopping, and is characterized by having an accumulator 14 for accumulating pressure by introducing a part of winch motor driving pressure, and a pilot check valve 15 for deriving the accumulating pressure accumulated in the accumulator 14 to a hoisting side pipe 4a when operating hoisting or lowering after stopping hoisting. COPYRIGHT: (C)2003,JPO