| 摘要 |
<p>A speed and/or direction change means includes a wobbling member (10) adapted for orderly cyclic wobbling about a wobble centre and having a frictional contact surface, and this is combined with means for imparting an orderly cyclic wobbling motion to the wobbling member and there is a rotor having a contact surface. The rotor is able to rotate relative to the wobbling member so that, under the orderly cyclic wobbling of the wobbling member the contact surface of the rotor is progressively engaged by the contact surface of the wobbling member at a circularly moving locus of contact to achieve a differing effective gear ratio.</p> |
