Invention Grant
US09533734B2 Electric assist device for a bicycle and electrically assisted bicycle provided with such a device 有权
具有这种装置的自行车和电动辅助自行车用电动辅助装置

Electric assist device for a bicycle and electrically assisted bicycle provided with such a device
Abstract:
An electrical assist device is provided for a bicycle. The device includes an electric machine, a drive pinion, an attachment device, a source of electrical energy, and a controller. The attachment device fixes the electric machine to the bicycle near a tire of a wheel of the bicycle. The source of electrical energy powers the electric machine. The controller controls the electric machine. The electric machine includes a rotor, which drives the drive pinion. The drive pinion includes teeth structured to mesh tangentially with complementary teeth fastened to the tire.
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