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

Patent metadata

Field	Value
Publication number	US-11975950-B2
Application number	US-202117402308-A
Country	US
Kind code	B2
Filing date	Aug 13, 2021
Priority date	Aug 13, 2020
Publication date	May 7, 2024
Grant date	May 7, 2024

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, and wherein the telescopic tube section has a substantially smaller length than the inner telescopic section,
wherein an assembly arm is mounted at the outer boom set, and the assembly arm is movable between a transport position and an assembly position.

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

3. The 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 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 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 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. A telescopic boom for a crane, wherein the telescopic boom can be separated into two boom sets,
the telescopic boom comprising an outer boom set having a coupling section and at least one telescopic section of the outer boom set telescopically supported in the coupling section,
at least one additional telescopic section, wherein the at least one additional telescopic section is telescopically supportable in an inner telescopic section of the outer boom set, and
an assembly head detachably mountable at the inner telescopic section of the outer boom set,
wherein an assembly arm is provided that is mounted or mountable at the outer boom set, and that can be moved from a transport position into an assembly position and vice versa.

8. The telescopic boom in accordance with claim 7 , wherein the assembly arm has a deflection pulley via which an assembly rope is guidable for lifting of the assembly head, with the assembly rope being fastenable to a fastening point of the assembly head.

9. The telescopic boom in accordance with claim 8 , wherein an axis of rotation of the deflection pulley is inclined towards a longitudinal axis of the outer boom set and/or to/with a longitudinal axis of the assembly arm.

10. The telescopic boom in accordance with claim 9 , wherein the assembly arm is pivotably supported about an axis at the outer boom set, said axis not being oriented perpendicular to or in parallel with the longitudinal axis of the outer boom set.

11. The telescopic boom in accordance with claim 7 , wherein the assembly arm does not project beyond the outer contour of the outer boom set in the transport position.

12. A mobile crane having the telescopic boom in accordance with claim 7 .

13. The telescopic boom in accordance with claim 7 , wherein the assembly arm is mounted or mountable at the coupling section and at a fastening device.

14. The telescopic boom in accordance with claim 7 , wherein the assembly arm is mounted or mountable at the coupling section.

15. The telescopic boom in accordance with claim 7 , wherein the assembly arm is mounted or mountable at a fastening device for a guying of the telescopic boom.

16. A method of assembling an assembly head at an outer boom set of a telescopic boom, the method comprising:
a) moving an assembly arm into an assembly position;
b) guiding an assembly rope over a deflection pulley of the assembly arm and connecting the assembly rope to the assembly head;
c) raising the assembly head to a height of an inner telescopic section;
e) connecting the assembly head to the inner telescopic section;
f) releasing the assembly rope from the assembly head and removing the assembly rope from the assembly arm; and
g) moving the assembly arm into a transport position.

17. The method in accordance with claim 16 , wherein the assembly head is mounted at the outer boom set by establishing a pinning connection between a pulley head and the inner telescopic section.

18. The method in accordance with claim 16 , wherein the following step is carried out before step e):
d) partially extending the inner telescopic section to receive a telescopic tube section of the assembly head.

19. The method in accordance with claim 16 , wherein connecting the assembly head to the inner telescopic section includes pinning the assembly head to the inner telescopic section.

Assignees

• Liebherr Werk Ehingen

Inventors

• Boos Bernd

Classifications

• B66C23/707 Primary

  guiding devices for telescopic jibs · CPC title

• B66C23/66 Primary

  Outer or upper end constructions · CPC title

• B66C23/701 Primary

  telescopic · CPC title

• B66C23/702

  with a jib extension boom · CPC title