A Modular Power-Assisted Device for Bicycles

This creation combines the functions of two transmission systems of electric bicycle and electric assist bicycle, is a modular dual-input bicycle booster, the internal design uses the basic planetary gear train as the power coupling mechanism of dual input, adopts modular design, and has three operating modes, namely: auxiliary motor drive mode, rider pedaling mode, and hybrid mode, can be based on the riding environment and conditions, select the appropriate operation mode, assist the rider to contribute, and has the characteristics of dense structure, light weight, and easy to carry, which can be directly installed on the crank shaft of the current bicycle for use.