MOBILE CRANE FOR ANGLING A MAIN JIB EXTENSION RELATIVE TO A MAIN JIB OF A MOBILE CRANE
First Claim
1. A mobile crane, said mobile crane comprising a luffably mounted main jib that is configured to be raised via a luffing cylinder, and with a main jib extension releasably connected to a main jib head of the main jib via upper bolts and lower bolts, wherein the main jib extension, starting from a basic position after release of the upper bolts, is able to be angled about a luffing axis relative to the main jib by an angling drive, wherein the angling drive engages on a foot of the main jib extension, and wherein a lifting mechanism of the mobile crane, which is provided for another task, provides the movement energy for the angling drive, wherein the angling drive comprises a lever element having two lever arms with the lever element pivotably mounted on the top chord of the main jib extension, and wherein the first lever arm is connected to a lifting cable of the lifting mechanism for operating the angling drive and engages on the main jib head via the second lever arm.
2 Assignments
0 Petitions
Accused Products
Abstract
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.
12 Citations
14 Claims
- 1. A mobile crane, said mobile crane comprising a luffably mounted main jib that is configured to be raised via a luffing cylinder, and with a main jib extension releasably connected to a main jib head of the main jib via upper bolts and lower bolts, wherein the main jib extension, starting from a basic position after release of the upper bolts, is able to be angled about a luffing axis relative to the main jib by an angling drive, wherein the angling drive engages on a foot of the main jib extension, and wherein a lifting mechanism of the mobile crane, which is provided for another task, provides the movement energy for the angling drive, wherein the angling drive comprises a lever element having two lever arms with the lever element pivotably mounted on the top chord of the main jib extension, and wherein the first lever arm is connected to a lifting cable of the lifting mechanism for operating the angling drive and engages on the main jib head via the second lever arm.
Specification