Tower crane

Patent metadata

Field	Value
Publication number	US-10843908-B2
Application number	US-201615741831-A
Country	US
Kind code	B2
Filing date	Jul 6, 2016
Priority date	Jul 6, 2015
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

The invention relates to a tower crane with a crane tower and a jib mounted thereon as well as a counter-jib, wherein the length of the counter-jib is defined by the number of the counterweights received.

First claim

The invention claimed is:

1. A tower crane comprising:
a crane tower and a jib mounted thereon; and
a counter-jib,
wherein a length of the counter-jib is defined by a number of counterweights;
wherein a first counterweight is mounted to a free end of a steel structure of the counter-jib, and any other counterweights are directly connected to the first counterweight or to one another;
wherein at least one counterweight of the number of couterweights comprises at least one cantilevered panel to retain the at least one counterweight at a respective bearing point of the steel structure of the counter-jib or a further counterweight;
wherein the at least one counterweight additionally comprises at least one tab or at least one rigid hook establishing a tensile connection with the steel structure or the further counterweight; and
wherein at least one attachment rod extending transversely to a jib direction is provided at the steel structure or the further counterweight as a counter-element for the at least one tab or at least one rigid hook.

2. The tower crane according to claim 1 , wherein at least two counterweights of the number of counterweights in a counter-jib direction are mounted successively.

3. The tower crane according to claim 1 , wherein the bearing point of at least one counterweight is formed by a recess of an upper side of the counterweight.

4. The tower crane according to claim 3 , wherein a continuous platform is formed when successively arranging multiple counterweights through the recess.

5. The tower crane according to claim 4 , wherein the counterweights are identical.

6. The tower crane according to claim 4 , wherein at least one of the counterweights is surrounded at least partially by a steel frame.

7. The tower crane of claim 4 , wherein at least one part of the counterweights differ in at least one of thickness, perimeter, shape, or type of material used.

8. The tower crane of claim 3 , wherein the recess extends in the jib direction continuously through the counterweight.

9. A counterweight for ballasting a counter-jib of a tower crane, wherein the counterweight comprises at least one cantilevered panel to retain the counterweight on a horizontal bearing point, as well as at least one tab or at least one rigid hook, for establishing a tensile connection with an attachment rod;
wherein the counterweight comprises a bearing point for retaining the cantilevered panel of a further counterweight, wherein the bearing point is formed by a recess on an upper side of the counterweight and the recess extends in a mounting position in a jib direction continuously on the upper side through the counterweight;
wherein the counterweight is provided with a frame enclosing a ballast element; and
wherein the frame provides support to the ballast element.

10. The counterweight according to claim 9 , wherein the frame enclosure is made of steel.

11. The counterweight according to claim 9 , wherein the counterweight does not have a cleat.

12. The counterweight of claim 9 , wherein the cantilevered panel is in the form of at least one cleat.

Assignees

• Liebherr Werk Biberach Gmbh

Inventors

• Herse Thomas

Classifications

• B66C23/72 Primary

  Counterweights or supports for balancing lifting couples · CPC title

• B66C23/16

  with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements · CPC title