A hydraulic crane comprising:- 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 control the crane by boom tip control, 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 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.
HYDRAULIC CRANE
HYDRAULIKKRAN
GRUE HYDRAULIQUE
2019-06-05
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |