Mobile construction crane comprising a superstructure and an undercarriage and one or more electrical consumers

Patent metadata

Field	Value
Publication number	US-11945698-B2
Application number	US-201917287969-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Oct 25, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

The invention relates to a mobile construction crane comprising a superstructure and an undercarriage, wherein one or more electrical consumers are provided in or at the superstructure, wherein a supply of the one or more electrical consumers with electrical energy takes place by at least one current generator installed in the undercarriage.

First claim

The invention claimed is:

1. A mobile construction crane comprising a superstructure and an undercarriage, wherein one or more electrical consumers of the mobile construction crane are accommodated in or at the superstructure, wherein a supply of the one or more electrical consumers of the superstructure with electrical energy takes place by at least one current generator installed in the undercarriage, and wherein a switchgear cabinet for a generator control is designed as an independent unit and is arranged physically separated from the at least one current generator at the undercarriage.

2. The mobile construction crane in accordance with claim 1 , wherein at least one of the one or more electrical consumers is an electrically driven hoisting winch of the superstructure, and/or an adjustment drive to adjust a crane cab movably supported at a crane tower, and/or a telescopic drive for a telescopic crane tower, and/or a trolley drive, and/or a crane control, and/or an illumination means.

3. The mobile construction crane in accordance with claim 1 , wherein electrical supply lines are led from the at least one current generator via a rotary union of a slewing gear between the superstructure and the undercarriage to the one or more electrical consumers of the superstructure.

4. The mobile construction crane in accordance with claim 1 , wherein the at least one current generator is drivable by at least one internal combustion engine installed in the undercarriage.

5. The mobile construction crane in accordance with claim 4 , wherein the at least one current generator is drivable in a plurality of speed ranges.

6. The mobile construction crane in accordance with claim 5 , wherein a control is provided and configured to select a speed range of the at least one current generator in dependence on a current power demand.

7. The mobile construction crane in accordance with claim 6 , wherein the control is configured to select the speed range of the at least one current generator by transfer of a required engine speed to a control device of the at least one internal combustion engine.

8. The mobile construction crane in accordance with claim 4 , wherein the at least one current generator is connected to a drive shaft of the at least one internal combustion engine via a transfer case.

9. The mobile construction crane in accordance with claim 4 , wherein the at least one internal combustion engine provides the required torque for a traction drivetrain of the mobile construction crane.

10. The mobile construction crane in accordance with claim 1 , wherein one or more electrical consumers of the mobile construction crane can selectively be supplied with electrical energy by the at least one generator of the undercarriage and/or via an interface for an external energy source, with the interface and/or a switchover means for switching over an energy supply positioned at the undercarriage.

11. The mobile construction crane in accordance with claim 1 , wherein an interface is provided that enables an energy supply of external consumers by the at least one current generator of the undercarriage.

12. The mobile construction crane in accordance with claim 1 , wherein the at least one current generator is arranged in a hollow space of a steel frame of the undercarriage, with a support of the generator there being suspended or standing.

13. The mobile construction crane in accordance with claim 1 , wherein the switchgear cabinet is fastened to the undercarriage.

14. A mobile construction crane comprising a superstructure and an undercarriage, wherein one or more electrical consumers of the mobile construction crane are accommodated in or at the superstructure, wherein a supply of the one or more electrical consumers of the superstructure with electrical energy takes place by at least one current generator installed in the undercarriage, wherein the at least one current generator is drivable by at least one internal combustion engine installed in the undercarriage, wherein the at least one current generator is connected to a drive shaft of the at least one internal combustion engine via a transfer case, and wherein the connection of the at least one current generator to the transfer case takes place via a universal shaft having a cross-cut flange.

Assignees

• Liebherr Werk Biberach Gmbh

Inventors

• Assfalg Martin
• Eggert Michael
• Schmid Gerhard

Classifications

• B66C13/12 Primary

  Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices · CPC title

• B60R16/03

  for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} · CPC title

• B66C13/22

  for electric drives (transmitting control pulses B66C13/40; systems or devices of general application H02P) · CPC title

• B66C23/84

  Slewing gear (anti-friction bearings F16C) · CPC title

• B66C23/26

  for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail (with supporting couples provided by walls or buildings B66C23/20; mounted on vehicles B66C23/36; jib constructions B66C23/64) · CPC title