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US 12,691,969 B2Granted
Means of transport that can be simultaneously driven electromotively and by human muscular power
AssigneeKill Watt GmbH
InventorsHans Peter Ackermann, Volker Ackermann
Life of this patent
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Abstract
A means of transport, in particular a pedelec, which can be driven by means of drive energy produced electromotively and by human muscular power, comprising a drive unit in which an electric drive motor and a harmonic drive transmission are nested one inside the other, thereby saving space.
Claims16
A means of transport that can be simultaneously driven electromotively and by human muscular power, with a drive unit, the drive unit comprising:
- an input shaft for transmitting drive energy generated from human muscular power;
- an output shaft for delivering drive energy to a travel unit;
- a harmonic drive transmission arranged around a rotation axis and having a wave generator, a flexspline and a ring gear;
- an electric drive motor arranged around the rotation axis and having a stator and a rotor, wherein drive energy of the electric drive motor is transmittable to the output shaft via the harmonic drive transmission,
- wherein the flexspline is configured as a sleeve extending in an axial direction of the rotation axis, which is connected on one axial side to a rotary bearing and toward another axial side has an engagement region for the wave generator, wherein a sleeve cavity is provided between the rotary bearing and the wave generator, as seen in the axial direction of the rotation axis, and
- wherein the electric drive motor is arranged in the axial direction of the rotation axis at least partially in the sleeve cavity of the flexspline of the harmonic drive transmission with respect to an axial extent of the stator along the rotation axis.
3 more elements
Dependencies are inferred from the claim text.