公开(公告)号：EP1181458B1

公开(公告)日：2004-02-25

申请号：EP00940261.1

申请日：2000-05-23

申请人： Bosch Rexroth AG

发明人： PÜSCHEL, Reiner

IPC分类号： F15B11/16 ,  B29C45/68

CPC分类号： F15B21/14 ,  B29C45/82 ,  B29C2045/828 ,  F04B49/002 ,  F04B49/08 ,  F15B11/162 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/3057 ,  F15B2211/3059 ,  F15B2211/3111 ,  F15B2211/327 ,  F15B2211/6309 ,  F15B2211/6654

摘要： The invention relates to a hydraulic drive having several hydraulic consumers (10, 40, 41, 42, 43) also comprising a differential cylinder (10) and located especially in a plastic injection molding machine. A first (25) and a second (26) hydraulic machines are provided, both of which can operate as a pump and as a motor. The first of the two hydraulic machines is connected to a tank (30) by means of a second connection (29) and communicates with a pressure line (19) by means of a first connection (28). The pressure line can be connected to the working chamber (13) of the differential cylinder located on the rear side of the piston rod by means of a check valve (17). The second hydraulic machine is also connected to the pressure line by means of a first connection (32) and can be connected by means of a second connection (33) to a tank via a non-return valve (34) that opens in the direction of the second connection and to the working chamber (14) of the differential cylinder located on the rear side of the piston rod. According to the invention, both hydraulic machines (25, 26) can also be used to supply pressurized medium to at least one additional hydraulic consumer (40, 41, 42, 43). To this end, the at least one additional consumer can be connected to the pressure line by means of the distributing valve (44, 45, 46, 47).