US 12,296,921 B2
Electric bicycle drive unit
Henrik Braedt, Dittelbrunn (DE); and Sebastian Heyna, Dittelbrunn (DE)
Assigned to SRAM DEUTSCHLAND GmbH, Schweinfurt (DE)
Filed by SRAM DEUTSCHLAND GmbH, Schweinfurt (DE)
Filed on Apr. 20, 2022, as Appl. No. 17/725,047.
Claims priority of application No. 10 2021 002 051.0 (DE), filed on Apr. 20, 2021; application No. 10 2021 005 374.5 (DE), filed on Oct. 30, 2021; and application No. 10 2022 109 481.2 (DE), filed on Apr. 19, 2022.
Prior Publication US 2022/0332389 A1, Oct. 20, 2022
Int. Cl. B62M 6/55 (2010.01); B62J 43/13 (2020.01)
CPC B62M 6/55 (2013.01) [B62J 43/13 (2020.02)] 20 Claims
OG exemplary drawing
 
1. An Electric Bicycle Drive Unit comprising:
an Electric Motor Device having a Bottom Bracket Assembly and a Bottom Bracket Shaft and a motor output shaft, the motor output shaft being arranged coaxially with the Bottom Bracket Shaft; and an Integrative Energy Storage Device for supplying energy to the electric motor device,
wherein the Electric Motor Device and the Integrative Energy Storage Device are configured to be separable, allowing the Energy Storage Device to be user-removable independently of the Electric Motor Device,
wherein the Integrative Energy Storage Device is arranged adjacent to the electric motor device so that a center of gravity position of the Energy Storage Device and a center of gravity position of the Electric Bicycle Drive Unit lie within the Bottom Bracket Area of a bicycle frame,
wherein the Integrative Energy Storage Device is at least partially enclosed by a Motor Housing of the Electric Motor Device, the Motor Housing simultaneously forming a Common Drive Housing for the Electric Motor Device and the Integrative Energy Storage Device, the Common Drive Housing not being a part of the bicycle frame.