Wheel energy recovery device of electric bicycle

The utility model discloses an electric bicycle wheel energy recovery device which comprises a box body, a protective cover and a brake disc gear, the protective cover is fixed on the outer wall of one side of the box body through screws, the inside of the protective cover is rotatably connected with a first belt wheel through a rotating shaft, and a connecting gear is integrally formed on the outer wall of one side of the first belt wheel. The interior of the protective cover is rotationally connected with a first rotating shaft through a bearing, and the exterior of the first rotating shaft is in key connection with a second belt wheel. In the braking process, an operator presses down the brake handle, at the moment, the brake cable drives the first pressing disc to be attached to the friction plate through the pressing rod, a brake system is connected, at the moment, transmission is small, a certain braking effect is achieved, the vehicle speed can be slowly reduced, and the brake handle is pressed down wi