公开(公告)号：EP0404956A1

公开(公告)日：1991-01-02

申请号：EP89909849.5

申请日：1989-08-30

申请人： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

发明人： KARAKAMA, Tadao, c/o Kawasaki Factory ,  ENDO, Hiroshi, c/o Kawasaki Factory ,  NUNOTANI, Sadao, c/o Kawasaku Factory ,  ISHIZAKI, Naoki, c/o Kawasaki Factory ,  TAKANO, Toshiro, c/o Kawasaki Factory

IPC分类号： F15B11/04 ,  F15B11/16 ,  F15B20/00

CPC分类号： F15B13/015 ,  E02F9/226 ,  F16L55/1022 ,  Y10T137/87201 ,  Y10T137/87209

摘要： This invention relates to an oil pressure feeder which can prevent the abrupt fall of a work machine at the time of breakage of a piping arrangement for supplying a pressurized oil to a work machine cylinder and which can make the lowering speeds of a plurality of work machine cylinders equal. The oil pressure feeder includes a lock valve (B) consisting of a check valve (77), a poppet valve (78) and a pilot valve (79) that are disposed inside a valve housing (70) fixed to a cylinder tube (6), and an operation valve (C) for supplying selectively the pressurized oil to each pressure chamber (9a, 9b) for lifting and lowering the work machine cylinder (A) through each of two pressure oil feed piping arrangements (a, b). One (a) of these piping arrangements communicates with the pressure chamber (9a) for lifting through the check valve (77) and a first main port (75) communicating with this pressure chamber (9a) communicates with a tank port (74) through the poppet (32') of the poppet valve (78) whose opening/closing is controlled by the pilot valve (79).

摘要翻译： 本发明涉及一种油压给料机，其能够防止作业机器在作业机械缸上供给加压油的配管装置断裂时的突然下降，能够使多台作业机的下降速度 气瓶相等。 油压给料机包括一个锁紧阀（B），它由止回阀（77），提升阀（78）和先导阀（79）组成，它们设置在固定在缸筒（6） ）和用于通过两个压力供油配管装置（a，b）中的每一个选择性地将加压油供给到各压力室（9a，9b）的操作阀（C），用于使作业机筒（A）升降。 这些管道装置中的一个（a）与用于提升止回阀（77）的压力室（9a）连通，与该压力室（9a）连通的第一主端口（75）与罐口（74）连通 提升阀（78）的提升阀（32'）的开/关由先导阀（79）控制。