| 摘要 |
An electric scooter is provided to increasing the driving fuel efficiency and gradability by changing the rotation ratio of wheel and motor according to the operation state. An electric scooter comprises a power transmission unit delivering the motor torque to wheels and including an infinite variable speed device. The infinite variable speed device includes: a driving pulley(120) consisting of a movable pulley and a fixed pulley; a follower(130) consisting of the movable pulley and the fixed pulley in which the friction surface is formed; and a belt(140) installed in the driving pulley and follower in order to deliver the torque. |
