Tower crane

Patent metadata

Field	Value
Publication number	US-10934140-B2
Application number	US-201716333497-A
Country	US
Kind code	B2
Filing date	Sep 12, 2017
Priority date	Sep 15, 2016
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

The present invention relates to a tower crane, in particular a revolving tower crane, comprising a crane tower composed of a plurality of tower pieces, a main boom arranged at the tower tip, and a counter-boom, wherein at least one main hoist rope is guided over the main boom to take up the load and at least one counter-boom hoist rope is guided over the counter-boom to take up a balance weight.

First claim

The invention claimed is:

1. A tower crane comprising a crane tower composed of a plurality of tower pieces, a main boom arranged at a tower tip, and a counter-boom, wherein at least one main hoist rope is guided over the main boom to take up a load and at least one counter-boom hoist rope is guided over the counter-boom to take up at least one ballast element;
wherein the crane tower comprises at least one climb piece at which the counter-boom and/or the main boom is/are luffably taken up; and
wherein one or more consoles are laterally installed at the at least one climb piece, at which consoles the main boom and/or the counter-boom is/are pivotably supported.

2. The tower crane in accordance with claim 1 , wherein the at least one ballast element to ballast the counter-boom is taken up via the at least one counter-boom hoist rope.

3. The tower crane in accordance with claim 1 , wherein the counter-boom and the main boom are luffably arranged at the tower tip.

4. The tower crane in accordance with claim 1 , wherein the at least one climb piece is movable in a vertical direction by means of a hydraulic cylinder, with the hydraulic cylinder being supported at abutments of the crane tower provided for this purpose.

5. The tower crane in accordance with claim 1 , wherein one or more drive units and/or switch cabinets and/or hydraulic tanks are installed within at least one of the consoles.

6. The tower crane in accordance with claim 1 , wherein at least two guying frames are provided at the at least one climb piece, with at least one guying frame of the at least two guying frames being connected to a guying rope system of the main boom and at least one other guying frame of the at least two guying frames being connected to a guying rope system of the counter-boom, with a respective guying frame being rotatably supported at a console of the lattice piece and with the guying frame of the main boom being supported at the console taking up the main boom and the guying frame of the counter-boom being supported at the console taking up the counter-boom.

7. The tower crane in accordance with claim 6 , wherein the guying frames are connected to one another via a length-adjustable connection.

8. The tower crane in accordance with claim 7 , wherein the length-adjutable connection is a rope system.

9. The tower crane in accordance with claim 6 , wherein the main boom and the counter-boom are downwardly luffable such that the main boom and the counter-boom come to lie laterally at and almost in parallel with the crane tower, by letting out the respective guying rope systems and by extending the rope system connecting the guying frames.

10. The tower crane in accordance with claim 1 , wherein the at least one climb piece comprises a pivot bearing to rotate the at least one climb piece about a vertical axis of rotation with respect to the crane tower.

11. The tower crane in accordance with claim 1 , wherein at least one auxiliary boom is provided at the counter-boom, with the auxiliary boom being pivotable at a tip of the counter-boom, and with at least one auxiliary hoist rope being guided over the auxiliary boom.

12. The tower crane in accordance with claim 11 , wherein the auxiliary hoist rope or a tip of the auxiliary boom is pivotable over the climb piece of the crane tower to introduce one or more lattice pieces into the climb piece that are taken up by means of the auxiliary hoist rope.

13. The tower crane in accordance with claim 11 , wherein the auxiliary boom is pivotable with respect to the counter-boom by means of at least one drive.

14. The tower crane in accordance with claim 13 , wherein the drive is a hydraulic cylinder.

15. The tower crane in accordance with claim 1 , wherein at least one collar is installed or installable about the crane tower; and in that a guying is spanned between any fixing points of a base of the crane or of an undercarriage of the crane and the collar.

16. The tower crane in accordance with claim 15 , wherein the guying at least partially comprises rope material and/or sheet metal material.

17. The tower crane in accordance with claim 1 , wherein the tower crane is a revolving tower crane.

18. The tower crane in accordance with claim 1 , wherein the one or more consoles are installed at a front side and a rear side of the climb piece lying in a luffing plane.

Assignees

• Liebherr Werk Biberach Gmbh

Inventors

• Konijn Eric

Classifications

• B66C23/72 Primary

  Counterweights or supports for balancing lifting couples · CPC title

• B66C23/76

  and movable to take account of variations of load or of variations of length of jib · CPC title

• B66C23/283 Primary

  with frameworks composed of assembled elements · CPC title

• B66C23/54

  with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors · CPC title