| 摘要 |
A transmission (10) for converting an input rotational motion having an input angular speed into an output rotational motion having an output angular speed. The transmission (10) includes a transmission body (12); a first rotating component (14) rotatably mounted to the transmission body (12); a second rotating component (18) mounted to the transmission body (12) in a substantially parallel and spaced apart relationship relatively to the first rotating component (14); an output component (20) mounted to the transmission body (12) substantially concentrically relatively to the first and second rotating components (14) and (18), the output component (20) being rotatable about a rotation axis (16) at the output angular speed; a first coupling mechanism (22) operatively coupled to the first and second rotating components (14) and (18) such that a rotation of the first rotating component (14) causes a rotation of the second rotating component (18), the first coupling mechanism (22) being fixed relatively to the transmission body (12); a second coupling mechanism (24), the second coupling mechanism (24) including a substantially disc-shaped member (26, 38a) rotatably mounted to the output component substantially radially spaced apart from the rotation axis (16), the substantially disc-shaped member (26, 38a) being disposed between and engaged with the first and second rotating components (14) and (18). Rotating the first and second rotating components (14) and (18) produces a substantially circumferential movement of the disc-shaped member (26, 38a) relatively to the rotation axis, which causes a rotation of the output component (20) relatively to the transmission body (12); and at least one of the first and second coupling mechanisms (22) and (24) is a variable ratio mechanism allowing to selectively vary a ratio between the input angular speed and the output angular speed.
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