Bicycle gears

摘要

The gear box (1) has a driven shaft (2) that is adapted to drive a bicycle, and is fixed with a torque-proof first friction wheel (3). One of the driver and motor is driven coaxially to the driven shaft mounted in a coaxial a second friction wheel (4). The driven shaft is rotatably mounted with a double-cone (5). The torque between the first friction wheel and the second friction wheel is transmitted to the double-cone frictionally. An independent claim is included for bicycle.