AUTOMATICALLY INCREASE OR DECREASE DUAL TORQUE SPEED CHANGE DEVICE

摘要

PURPOSE: An automatic dual torque increase/decrease transmission is provided to efficiently perform the gear transmission of a bicycle based on the travel information of the bicycle, thereby facilitating an efficient operation of the bicycle. CONSTITUTION: A first input axis (110) is rotated with the power of the outside. A first rotator (120) is rotated with the first input axis. A first output axis (130) is rotated with the torque of the first input axis. A second rotator (140) is arranged on the first output axis and is rotated with the first output axis. A first power carrier (150) delivers the torque of the first rotator to the second rotator.