Power-supporting transmission system of power-assisting bicycle, has drive motor that is equipped with reduction gear at front end of output shaft, where last reduction gear is mounted on outer side of blanking plate

摘要

The transmission system (1) has an annular magnet that is mounted on one side of a shift gear of a gear set and is moved synchronously by an external force. A Hall sensor is installed on a pedaling end of the annular magnet, for detecting a change in displacement of the ring-shaped magnet. A blanking plate is attached to a gear edge of the gear set and a chain wheel (G1). A drive motor is equipped with a reduction gear at a front end of an output shaft. The last reduction gear is mounted on an outer side of the blanking plate.