Mobile crane boom having an autarchic hydraulic power unit mounted thereon

• US 20050098524A1
• Filed: 08/20/2004
• Published: 05/12/2005
• Est. Priority Date: 08/22/2003
• Status: Active Grant

• Current Assignee: Tadano Demag GmbH (Tadano Limited)
• Original Assignee: Terex Demag GmbH (Tadano Limited)
• Inventors: Irsch, Michael, Backes, Bernd
• Granted Patent: US 7,258,242 B2
• Time in Patent Office: Days
• US Class Current: 212/300
• CPC Class Codes: B66C 13/18 Control systems or devices exclusively for rope, cable, or chain winding mechanisms B66D1/40
• CPC Class Codes: B66C 23/702 with a jib extension boom
• CPC Class Codes: B66C 23/82 Luffing gear

Abstract

The present invention relates to a mobile crane boom having a self-sufficient energy supply arranged on it for supplying hydraulic energy to at least one hydraulic load arranged on the mobile crane boom. The supply of the hydraulic load arranged on the mobile crane boom is therefore not carried out by means of a hydraulic unit arranged on the revolving superstructure of the crane, which provides the hydraulic energy to each hydraulic load via hoses, but by means of a hydraulic unit which is arranged in the upper reaches of the mobile crane boom or in the area of the linkage of any second boom section. By arranging the hydraulic unit directly on the boom, the hoses normally required for supplying the hydraulic loads can be eliminated.

Claims

1. A mobile crane boom, having a self-sufficient hydraulic unit arranged on it for supplying hydraulic energy to at least one hydraulic load arranged on the crane boom.

2. The mobile crane boom of claim 1,

wherein the mobile crane boom has at least a first boom section comprising a main boom, wherein said hydraulic unit is arranged either at the head of said first boom section or at a second boom section attachable to the first boom section.

3. The mobile crane boom of claim 2,

wherein said second boom section is kinematically coupled with said first boom section via at least one piston-cylinder unit fed by said hydraulic unit.

4. The mobile crane boom of claim 3,

wherein said first piston-cylinder unit is arranged between the head of said first boom section and the foot of said second boom section.

5. The mobile crane boom of claim 4,

wherein by operating said hydraulic unit, said second boom section is pivoted in the pivoting plane by means of said first piston-cylinder unit.

6. The mobile crane boom of claim 5,

wherein said second boom section is a main boom extension.

7. The mobile crane boom of claim 2,

wherein said first boom section comprises at least one intermediate portion arranged between said second boom section and said main boom.

8. The mobile crane boom of claim 2, wherein said main boom is a telescopic boom for a telescopic crane.

9. The mobile crane boom of claim 2, wherein said main boom is a latticework boom for a mobile crane.

10. The mobile crane boom of claim 1 or claim 2,

wherein said hydraulic unit is a self-sufficient energy supply unit which does not comprise any energy supply hoses.

11. The mobile crane boom of claim 1 or claim 2,

wherein said hydraulic unit is operated by an internal combustion engine.

12. The mobile crane boom of claim 1 or claim 2,

wherein said hydraulic unit is a diesel unit.

13. The mobile crane boom of claim 1 or claim 2,

wherein said hydraulic unit is supported so that it may be rotated about at least one axis.

14. The mobile crane boom of claim 1 or claim 2,

wherein said hydraulic unit supplies other hydraulic loads arranged on said crane boom.

15. The mobile crane boom of claim 2,

wherein said first boom section is connected to said second boom section by hydraulically operable boltings which are operated by means of said hydraulic unit.

16. The mobile crane boom of claim 2,

wherein, at said first boom section or at said second boom section a pulley foldable up and down by means of a second piston-cylinder unit is arranged for guiding a lifting cable, wherein said piston-cylinder unit is operated for moving said pulley with the aid of the hydraulic unit.

17. The mobile crane boom of claim 2,

wherein said second boom section can be pivoted vertically to the pivoting plane with a second piston-cylinder unit by operating said hydraulic unit.

18. The mobile crane boom of claim 2,

wherein said first boom section is a main boom of a telescopic crane and said second boom section is a main boom extension attached to the main boom in a pivotable fashion.

20. The main boom extension according to claim 11,

wherein further hydraulic loads can be supplied with the hydraulic energy generated by the hydraulic unit.

22. A mobile crane having a mobile crane boom according to any one of claims 1 to 18.

19. A main boom extension having a hydraulic unit arranged on it, wherein said hydraulic unit is suitable for the generation of hydraulic energy supplying at least one piston-cylinder unit for varying the inclination of said main boom extension, when the main boom extension is coupled to the main boom.

21. A hydraulic supply of hydraulic energy for at least one hydraulic load arranged at a mobile crane boom, wherein said hydraulic supply of said at least one hydraulic load is ensured by a hydraulic unit arranged on said mobile crane boom.