Telescopic boom and mobile crane

Patent metadata

Field	Value
Publication number	US-10494236-B2
Application number	US-201815976158-A
Country	US
Kind code	B2
Filing date	May 10, 2018
Priority date	May 12, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

The present invention relates to a telescopic boom having a coupling section at whose lower shell at least one luffing cylinder mount, in particular a bolt mount, is centrally provided for fastening at least one luffing cylinder, wherein at least two closed sheet metal box structures for the load transmission from the luffing cylinder mount into the structure of the telescopic boom are provided at the support metal sheets of the luffing cylinder mount.

First claim

The invention claimed is:

1. A telescopic boom having a coupling section having a lower shell and at least one luffing cylinder mount centrally provided for fastening at least one luffing cylinder to the telescopic boom, wherein
two closed sheet metal box structures for load transmission from the luffing cylinder mount into the telescopic boom, adjoin respective support metal sheets of the luffing cylinder mount.

2. A telescopic boom in accordance with claim 1 , wherein the sheet metal box structures are symmetrical with one another.

3. A telescopic boom in accordance with claim 1 , wherein the sheet metal box structures extend from the support metal sheets in a direction of a boom tip obliquely to a longitudinal boom axis.

4. A telescopic boom in accordance with claim 1 , wherein each of the sheet metal box structures has two side walls, a top metal sheet, and a terminal metal sheet.

5. A telescopic boom in accordance with claim 4 , wherein an outer side wall of each of the sheet metal box structures and/or the top metal sheets of each of the sheet metal box structures is in two parts or in multiple parts.

6. A telescopic boom in accordance with claim 5 , wherein an inner side wall is in one part.

7. A telescopic boom in accordance with claim 1 , wherein the sheet metal box structures each have at least one inner standing metal sheet that is peripherally connected to the respective box structure and to the lower shell of the coupling section.

8. A telescopic boom in accordance with claim 7 , wherein the standing metal sheet is arranged in a transition region between at least two wall elements of a two-part or multiple part outer side wall and/or of a top metal sheet.

9. A telescopic boom in accordance with claim 1 , wherein the coupling section has a substantially perpendicular web region adjoining the lower shell.

10. A telescopic boom in accordance with claim 1 , wherein one or more U buckling braces extending in a boom direction are arranged at the lower shell, with corresponding recesses for the buckling braces being provided in the sheet metal box structures.

11. A telescopic boom in accordance with claim 10 , wherein the buckling braces are provided in a top metal sheet.

12. A telescopic boom in accordance with claim 1 , wherein one or more wing metal sheets are provided that are oriented transversely to a longitudinal boom axis and that at least partly surround the lower shell starting from the mount.

13. A crane, in particular a mobile crane, having at least one telescopic boom in accordance with claim 1 .

14. A telescopic boom in accordance with claim 1 , wherein the at least one luffing cylinder mount is a bolt mount.

Assignees

• Liebherr Werk Ehingen

Inventors

• Brzoska Sebastian
• Helbig Mario

Classifications

• B66C23/64

  Jibs · CPC title

• B66C2700/0357

  Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks · CPC title

• B66C23/701 Primary

  telescopic · CPC title

• B66C23/82

  Luffing gear · CPC title