Vehicle mounted crane
The invention relates to a vehicle crane, especially a mobile crane, automobile crane, or track-laying crane, comprising a superstructure which is embodied as a top slewing crane and encompasses a vertical tower and a boom located on the tower.
1. A vehicle mounted crane comprising
a non-rotating vertical tower, said tower comprising several relatively telescopic segments;
a slewing jib mounted on the tower,
an anchoring system for the telescopic tower, said anchoring system comprising a plurality of anchoring elements for each of at least two of said relatively telescopic tower segments distributed around the tower and about said respective telescopic segments; and
a tower stabilizer system comprising individual adjustors for the respective anchoring elements which are configured to pull at the respective anchoring elements and which can be selectively activated independently of one another by means of a control unit to compensate for loads induced by said slewing jib mounted on the tower.
2. A vehicle mounted crane as in claim 1 , wherein the anchoring system comprises a base disposed in a cross-shaped or star-shaped arrangement with respect to the axis of the telescopic tower, at least some of said anchoring elements being connected to portions of said base.
3. A vehicle mounted crane as in claim 1 , wherein the anchoring system comprises a base disposed in an H-shaped arrangement with respect to the axis of the telescopic tower, at least some of said anchoring elements being connected to portions of said base.
4. A vehicle mounted crane as in claim 1 , wherein the anchoring system acts on the tower by means of variable tension forces during operation of said crane to compensate for bending moments induced on the tower by the slewing jib.
5. A vehicle mounted crane as in claim 1 , wherein said anchoring elements are connected to the upper ends of at least two telescopic segments of said tower, whereby said anchoring elements may remain connected to said telescopic segments when said segments are extended or retracted with respect to one another.
6. A vehicle mounted crane as in claim 1 , further comprising at least one stabilizing jib extending laterally from at least one of said telescopic segment of said vertical tower, and at least one anchoring element connected to said at least one telescopic segment via said stabilizing jib.