| 摘要 |
FIELD: transport.SUBSTANCE: invention relates to bicycle speed control device. Control device comprises gearshift mechanism with pulleys, belts and flexible control cable. Gearshift mechanism is composed of two belts and two pairs of pulleys, constantly engaged. Two drive pulleys are installed on different sides of drive shaft, and two driven ones at different sides of driven shaft via overrunning clutches. High gear pulley is connected with drive shaft via clutch.EFFECT: provided is higher reliability and longer life.1 cl, 1 dwg |
