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US 12,649,541 B2Granted
Driving device for an electric bicycle and electric bicycle
AssigneePorsche eBike Performance GmbH
InventorJohannes Biechele
Life of this patent
Estimating the term…
Abstract
In an embodiment a driving device for an electric bicycle includes a motor unit configured to drive the electric bicycle, a drive and a gear stage, wherein the drive is configured to drive the gear stage, wherein the gear stage is configured to drive the electric bicycle, the gear stage being coupled to the drive, on the one hand, and configured to output a torque for driving the electric bicycle, on the other hand, and wherein the gear stage is designed as a strain wave gear and the drive and the strain wave gear are arrangeable coaxially with respect to an axis of rotation of a pedal crank of the electric bicycle.
Claims19
A driving device for an electric bicycle, the driving device comprising:
- a drive;
- and
- a gear stage,
- wherein the drive is configured to drive the gear stage,
- wherein the gear stage is configured to drive the electric bicycle, the gear stage being coupled to the drive and configured to output a torque for driving the electric bicycle, on the other hand,
- wherein the gear stage comprises a strain wave gear,
- wherein the drive and the strain wave gear are arrangeable coaxially with respect to an axis of rotation of a pedal crank of the electric bicycle, and
- wherein a radial coupling element of the gear stage has, with respect to the axis of rotation, on an outer side a plurality of radial projections arranged in coordination with a plurality of recesses arranged on a transmission element of the gear stage facing the radial coupling element so that the radial coupling element is couplable to and decouplable from the transmission element along the axis of rotation.
5 more elements
A driving device for an electric bicycle, the driving device comprising:
- a drive;
- and
- a gear stage,
- wherein the drive is configured to drive the gear stage, the gear stage comprising:
- a wave generator,
- a cylindrical outer ring with internal toothing,
- an elastic transmission element having external toothing formed in coordination with the internal toothing of the outer ring, and
- a radial coupling element,
- wherein the gear stage is a strain wave gear,
- wherein the wave generator is configured for predetermined deformation of the transmission element, the outer ring being an input and the radial coupling element being an output of the gear stage,
- wherein the transmission element is arranged between the outer ring and the radial coupling element and is configured to provide a predetermined transmission ratio of the gear stage for driving the electric bicycle,
- wherein the drive and the strain wave gear are arrangeable coaxially with respect to an axis of rotation of a pedal crank of the electric bicycle, and
- wherein the radial coupling element has, with respect to the axis of rotation, on an outer side, a plurality of radial projections arranged in coordination with a plurality of recesses, arranged on the transmission element facing the radial coupling element so that the radial coupling element is couplable to and decouplable from the transmission element along the axis of rotation.
10 more elements
An electric bicycle comprising:
- a bicycle frame having a lower frame section extending to a pedal bearing comprising a pedal crank;
- and
- a drive device comprising:
- a drive;
- and
- a gear stage,
- wherein the drive is configured to drive the gear stage, the gear stage comprising:
- a wave generator,
- a cylindrical outer ring with internal toothing,
- an elastic transmission element having external toothing formed in coordination with the internal toothing of the outer ring, and
- a radial coupling element,
- wherein the gear stage is a strain wave gear,
- wherein the wave generator is configured for predetermined deformation of the transmission element, the outer ring being an input and the radial coupling element being an output of the gear stage,
- wherein the transmission element is arranged between the outer ring and the radial coupling element and is configured to provide a predetermined transmission ratio of the gear stage for driving the electric bicycle,
- wherein the drive and the strain wave gear are arranged coaxially with respect to an axis of rotation of the pedal crank, and
- wherein the radial coupling element has, with respect to the axis of rotation, on an outer side, a plurality of radial projections arranged in coordination with a plurality of recesses, arranged on the transmission element facing the radial coupling element so that the radial coupling element is couplable to and decouplable from the transmission element along the axis of rotation.
13 more elements
Dependencies are inferred from the claim text.