MOBILE CRANE FOR ANGLING A MAIN JIB EXTENSION RELATIVE TO A MAIN JIB OF A MOBILE CRANE

摘要

A mobile crane having a tiltably mounted main jibwhich can be erected by a tilting cylinder, and having a main jib extension releasably connected to a main jib head of the main jib by upper and lower bolts. Starting from a normal position, after release of the upper bolts, the main jib extension can be angled about a tilting axis relative to the main jib by an angling drive that engages on a foot of the main jib extension, and a drive that is provided for another purpose supplies the kinetic energy for the angling drive. The angling drive includes a lever element having two lever arms, pivotably mounted on the upper chord of the main jib extension, with the first lever arm being connected to a lifting cable of the lifting gear for operation of the angling drive and engaging the main jib head by the second lever arm.