Electric drive system for bicycle, has electric motor directly screwed to frame via stator flange, where main supporting plate is provided as fixed frame part that is used as receiving plate

摘要

The drive system has an electric motor (1) directly screwed to a frame of a bicycle via a stator flange (11), where a main supporting plate is provided as a fixed frame part (10) that is used as a receiving plate. The receiving plate is welded or glued to the frame, where the receiving plate is provided as a fixed and insoluble part of the frame. Heat of the motor engine is delivered to the frame via the flange. A driven gear of a transmission stage (4) is directly connected to a foot pedal (5), where the foot pedal is eccentrically mounted in a bottom bracket housing.