| 摘要 |
PURPOSE: A sub drive apparatus for a bicycle is provided to reduce noise by enabling power transmission and shift through a timing belt. CONSTITUTION: A sub drive apparatus for a bicycle comprises a mount, a bracket, a motor, a pair of substrates(40), a slave gear, a timing belt, and a driving roller. A mount is fixed to the seat tube of a bicycle, wherein a flange is formed at the both ends thereof. The bracket is fixed by a screw has a fastening structure. The motor is inserted into the bracket. A pair of substrates are coupled with one end of the motor through a screw. The driven gear is coupled with the drive gear coupled with the drive shaft of the motor. The timing belt connects the drive gear and the drive gear. |
