Electric assist device for a bicycle and electrically assisted bicycle provided with such a device

摘要

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.

主权项

1. An electrical assist device for a bicycle, the device comprising:
an electric machine that includes a rotor; a drive pinion structured to be driven by the rotor of the electric machine, the drive pinion including teeth; an articulating structure that includes an oscillating arm, which carries the electric machine, and a support portion, which is fastened to the bicycle in a vicinity of a tire of a wheel of the bicycle, the support portion being in a fixed position relative to the bicycle, and the oscillating arm being arranged to pivot about a pivot axis with respect to the support portion; and a source of electrical energy for powering the electric machine, wherein the teeth of the drive pinion are structured to mesh tangentially with complementary teeth attached to the tire.