Construction- and/or material-handling machine
AssigneeLiebherr-Components Biberach GmbH
InventorsNorbert Hausladen, Viktor Schindler
Life of this patent
Estimating the term…
Abstract
The invention relates to a construction- and/or material-handling machine such as a crane, excavator or tracked vehicle, comprising an internal combustion engine that drives one or more energy-consuming devices such as a pump, winch, actuator for a structure or working-unit drives of the construction- and/or material-handling machine via a mechanical drive train. According to the invention, an electric drive for driving the mechanical drive train is provided and can be engaged by means of a clutch and decoupled from the mechanical drive train.
Claims18
A construction machine comprising:
- an internal combustion engine configured to drive one or more energy-consuming devices of the machine via a mechanical drive train, wherein the one or more energy consuming devices comprise a pump, winch, actuator for a structure and/or working unit drives,
- an electric drive for driving the mechanical drive train which is engaged by a clutch and decouplable from the mechanical drive train, and
- a planetary gear that connects the electric drive to the mechanical drive train, wherein the planetary gear comprises a stationary, non-rotating planet carrier, on which at least one set of planet wheels is rotatably mounted, wherein the planetary gear comprises double planet wheels connected to one another in a rotationally fixed manner and jointly rotatably mounted on the planet carrier, comprise different diameters and/or numbers of teeth and are in rolling engagement with two separate sun gears.
A retrofitted, pre-assembled electric drive assembly for installation in a mechanical drive train of a construction machine, comprising:
- a drive shaft piece comprising two portions,
- two mutually coaxial shaft connectors arranged at opposite axial ends of the assembly for rotationally fixed connection of the drive shaft piece to two drive shaft pieces of the mechanical drive train,
- an electric motor, wherein the electric motor comprises a hollow shaft through which the drive shaft piece passes, and wherein a planetary gear comprises, as input and output elements for rotationally fixed connection to the hollow shaft of the electric motor and a coupling half of the at least one clutch, two sun gears configured to be hollow and through which the drive shaft piece extends,
- at least one clutch for coupling and decoupling the electric motor to the drive shaft piece, and
- at least one spur gear between the electric motor and the at least one clutch and/or between the at least one clutch and the drive shaft piece.
A retrofitted, pre-assembled electric drive assembly for installation in a mechanical drive train of a construction machine, comprising:
- a drive shaft piece comprising two portions,
- two mutually coaxial shaft connectors arranged at opposite axial ends of the assembly for rotationally fixed connection of the drive shaft piece to two drive shaft pieces of the mechanical drive train,
- an electric motor,
- at least one clutch for coupling and decoupling the electric motor to the drive shaft piece, wherein a clutch is positioned between the drive shaft piece and one of the shaft connectors for releasing and closing the rotationally fixed connection between the shaft connector and the drive shaft piece, and
- at least one spur gear between the electric motor and the at least one clutch and/or between the at least one clutch and the drive shaft piece.
Dependencies are inferred from the claim text.