| 摘要 |
An assisting apparatus (14', 514) that uses power from a rotating member to assist the operation of a bicycle transmission includes a mounting member (132); a cam member (304,604) coupled to the mounting member (132) for rotation around a cam axis, wherein the cam member (304,604) has a cam surface (308,608) ;a cam follower (311, 612) cooperating with the cam surface (308,608) for moving in response to rotation of the cam member (304,604); a transmission actuating element coupling member (316) for communicating movement of the cam follower (311, 612) to a transmission actuating element (320); a first coupling member (324, 654) coupled for rotation of the cam member (304,604), wherein the first coupling member (324, 654) moves between a first engaged position and a first disengaged position; an operating member (323,474) for moving the first coupling member (324, 654) to the first engaged position; and a decoupling member that moves the first coupling member (324, 654) to the first disengaged position in response to a rotational position of the cam member (304,604). The first coupling member (324, 654) selectively engages and disengages the rotating member so that the rotational force of the rotating member may be used to assist the shifting operation. <IMAGE> |
