Fast assembly head for a telescopic boom and method of assembling same

Patent metadata

Field	Value
Publication number	US-12286332-B2
Application number	US-202418438259-A
Country	US
Kind code	B2
Filing date	Feb 9, 2024
Priority date	Aug 13, 2020
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

The disclosure relates to an assembly head for a telescopic boom that can be separated into an inner and an outer boom set and that is reversibly mountable at an inner telescopic section of the outer boom set. The assembly head comprises a pulley head having deflection pulleys and a telescopic tube section that is arranged the pulley head, that can be pushed into the inner telescopic section from its end, and that has a substantially smaller length than the inner telescopic section. The disclosure further relates to a separable telescopic boom having an assembly head in accordance with the disclosure, to a mobile crane having a telescopic boom in accordance with the disclosure, and to a method for the self-assembly of an assembly head in accordance with the disclosure at the outer boom set of a telescopic boom.

First claim

The invention claimed is:

1. A telescopic boom with an assembly head, wherein the telescopic boom can be separated, the assembly head detachably mounted at an inner telescopic section of an outer boom set, the assembly head comprising a pulley head having deflection pulleys and comprising a telescopic tube section that is arranged at the pulley head, wherein the telescopic tube section can be pushed into the inner telescopic section, wherein the telescopic tube section has a smaller length than the inner telescopic section, and wherein the telescopic tube section does not extend beyond a collar of an outer boom set of the telescopic boom.

2. The telescopic boom with an assembly head in accordance with claim 1 , wherein the telescopic tube section and the telescopic boom are different.

3. The telescopic boom with an assembly head in accordance with claim 1 , wherein the pulley head has connection means that are connectable to connection means of the inner telescopic section.

4. The telescopic boom with an assembly head in accordance with claim 3 , wherein the connection means of the inner telescopic section is arranged at a collar of the inner telescopic section.

5. The telescopic boom with an assembly head in accordance with claim 1 , wherein the pulley head has a fastening point to which an assembly rope can be fastened to lift the assembly head, with the fastening point being disposed above a center of gravity of the assembly head in a raised state.

6. The telescopic boom with an assembly head in accordance with claim 1 , wherein a guide element is provided that is arranged at the telescopic tube section and that cooperates with a guide element of the inner telescopic section on the assembly of the assembly head to facilitate an introduction of the telescopic tube section.

7. The telescopic boom with an assembly head in accordance with claim 1 , wherein the length of the telescopic tube section is smaller than half than a length of the inner telescopic section.

8. The telescopic boom with an assembly head in accordance with claim 1 , wherein the length of the telescopic tube section is the same as a length of the pulley head.

9. The telescopic boom with an assembly head in accordance with claim 1 , wherein an outer contour of the telescopic tube section follows an inner contour of the inner telescopic section.

10. The telescopic boom with an assembly head in accordance with claim 9 , wherein the telescopic tube section contacts inner sides of the inner telescopic section and/or lies on one or more support points.

11. The telescopic boom with an assembly head in accordance with claim 1 , wherein the telescopic tube section is not a telescopic section of the telescopic boom.

12. The telescopic boom with an assembly head in accordance with claim 1 , wherein pushing the telescopic tube section into the inner telescopic section establishes a pinning connection between the pulley head and the inner telescopic section.

13. The telescopic boom with an assembly head in accordance with claim 1 , wherein the telescopic tube section contacts a support point of the inner telescopic section on which an outer telescopic section of an inner boom set is supported in an assembled state.

Assignees

• Liebherr Werk Ehingen

Inventors

• Boos Bernd

Classifications

• B66C23/66 Primary

  Outer or upper end constructions · CPC title

• B66C23/702

  with a jib extension boom · CPC title

• B66C23/707 Primary

  guiding devices for telescopic jibs · CPC title

• B66C23/701 Primary

  telescopic · CPC title