International Research Journal of Education and Technology

A Shaft Driven Bicycle is a bicycle in which the power from pedals to rear wheel of the bicycle is transmitted by means of gear and shaft arrangement unlike the conventional chain drive. The main aim of the project is to obtain a maximum displacement of bicycle by transmitting the maximum possible torque from pedals to the rear wheel for a minimum applied force, reducing the human effort. This project is estimated to be a more reliable and safe system.  Shaft-driven bicycles have bevel gears and a connecting rod system where a conventional bicycle would have its chain ring. The bevel gear meshes with another bevel gear mounted on the drive shaft. The Bevel gears are the most efficient way of turning drives 90 degrees as compared to worm gears or crossed helical gear. This system consists of two set of bevel gears at both the ends. The shaft drive only needs periodic lubrication using a grease gun to keep the gears running quiet and smooth. This “chainless” drive system provides smooth, quiet and efficient transfer of energy from the pedals to the rear wheels. The methodology of the project is to design the chainless transmission system and carryout an analysis of the same using design and analysis tools. A comparison of theoretical and simulated results will be done.

Key Words:  A Shaft Driven Bicycle, Chain drive, Torque, of Bevel Gears, Transmission System.