公开(公告)号：US11591190B2

公开(公告)日：2023-02-28

申请号：US16095832

申请日：2017-04-20

申请人： Cargotec Patenter AB

发明人： Sten Sirén ,  Per Gustafsson ,  Lars Rydahl

IPC分类号： B66C23/90 ,  B66C13/20 ,  B66C13/44 ,  B66C13/46 ,  B66C23/68 ,  B66C23/70 ,  B66C23/00 ,  B66C23/42 ,  B66C23/78

摘要： A hydraulic crane comprising: —a rotatable column (7); —a crane boom system (10) comprising two or more liftable and lowerable crane booms (11, 13); and —an electronic control device (25), which is configured to prevent an execution of crane boom movements that would make the lifting moment of the crane exceed the maximum allowed lifting moment of the crane, and to continuously establish position information as to the prevailing position of the load suspension point (P) of the crane boom system. When the lifting moment of the crane has reached a limit value at a given level below the maximum allowed lifting moment, the electronic control device is configured to prevent the execution of any combination of crane boom movements that would increase the horizontal distance between the load suspension point and said vertical axis of rotation and at the same time allow the execution of any combination of crane boom movements that keeps said horizontal distance unchanged or reduces said horizontal distance.