Assisting apparatus for changing speeds in a bicycle transmission

摘要

An assisting apparatus (14) for using power from a rotating member (534,616) to assist the operation of a bicycle transmission includes a mounting unit and an input transmission member (176,706) coupled to the mounting unit, wherein the input transmission member (176,706) moves to at least a first input position and a second input position. An output transmission member (280,794) is coupled to the mounting unit, wherein the output transmission member moves to at least a first output position and a second output position corresponding to the at least first input position and the second input position of the input transmission member (176,706), respectively. A rotating member engaging member (498,892) moves between a rotating member engaging position and a rotating member disengaging position, and a motion transmitting mechanism is provided for transmitting motion from the rotating member engaging member (498,892) to the output transmission member. A switching mechanism is provided for moving the rotating member engaging member to the rotating member engaging position when the input transmission member (176,706) is in one of the at least first input position or second input position and the output transmission member is not in the corresponding at least first output position or second output position, and for moving the rotating member engaging member to the rotating member disengaging position when the input transmission member (176,706) is in one of the at least first input position, or second input position and the output transmission member (280,794) is in the corresponding at least first output position or second output position.