A Study on the Application of Shiftable Pulley of Power-train for Bicycles Using Belt

A Study on the Application of Shiftable Pulley of Power-train for Bicycles Using Belt

A bicycle is an eco-friendly vehicle that does not emit harmful exhaust gases that pollute human beings or the earth, and is used for leisure or sports by exerting an exercise effect on the human body while a person rides a bicycle. Chains and sprocket wheels have long been used as power-trains for environmentally friendly and human-friendly bicycles. In this study, a new type of power-train device that can be applied to the center of the wheel of a bicycle using a belt and a pulley capable of performing a shift function is described. A method of applying a pulley capable of performing a shift function to a wheel of a bicycle depends on the type of a bicycle to be adopted. Bicycles that do not require a shift function, bicycles that require only one of the front and rear wheels, and front and rear wheels are all applied. The application of pulleys with shift function to these various types of bicycle wheels was studied.