Bicycle mid motor and electric assist bicycle

摘要

Bicycle mid motors and electric assist bicycles are related to the electric assist bicycle technical field, and solve the technical problems of conventional bicycle mid motors that have a complicated torque sensor structure and low detection accuracy. The bicycle mid motor is integrated with a motor casing 011, a motor inner stator 012 fixed in the motor casing 011 via an inner stator frame, a motor outer rotor 013 mounted on the inner stator frame, and a motor outer rotor 013. Motor main body output shaft 014 connected to the inner stator frame, the first planetary gear mechanism 015 installed inside the inner stator frame and outputting after increasing the input of human power, and fixedly mounted inside the inner stator frame And an elastic body 031 connected to the ring gear of the first planetary gear mechanism 015, and a torque sensor 032 that is attached to the elastic body 031 and detects a pedal depression force provided from the rider to the bicycle.