公开(公告)号：EP1731801A4

公开(公告)日：2010-05-12

申请号：EP05720665

申请日：2005-03-08

申请人： HITACHI CONSTRUCTION MACHINERY ,  TCM CORP

发明人： YOSHIKAWA MASAKI ,  MUROTA JUJITSU ,  YAMAZAKI YASUO

IPC分类号： F16H61/00 ,  B60K20/00 ,  B60K20/02 ,  E02F9/20 ,  E02F9/22 ,  E02F9/24 ,  F16H59/02 ,  F16H59/12 ,  F16H61/18

CPC分类号： F16H59/02 ,  E02F9/2004 ,  E02F9/24 ,  F16H59/12 ,  F16H61/18 ,  F16H2059/0256 ,  Y10T74/20582 ,  Y10T477/60

摘要： A forward/ reverse control system for a work machine cancels a second control state, in which forward/reverse switching control is performed by a second forward/reverse control means, by an operation of a first forward/reverse control means to return to a first control state in which forward/reverse switching control is performed by the first forward/reverse control means. The system is provided with a F-N-R lever unit 30 (the first forward/reverse control means) and F-N-R switch unit 40 (the second forward/reverse control means) that instruct forward, reverse or neutral, a controller 42 which performs forward/reverse switching control by giving priority to an instruction from the F-N-R lever unit 30 over an instruction from the F-N-R switch unit 40, and a selector switch 41 which by an operation of a switching control member 41a, instructs the controller 42 to switch to the second control state or to cancel the second control state. As a consequence, the system has made it possible to return to the first control state without an operation of the first forward/reverse control means.