| 摘要 |
<p>A variable drive comprises a driving flange, a driven flange (22) facing the driving flange, and guides disposed in each flange extending radially with respect to the centre of the flange. Members are retained for movement in the guides. These members are operatively connected together whereby torque may be transmitted through the members between the flanges and the rotational axes of the flanges moved laterally relative to one another. A transmission member in the form of a ring gear (23) meshes with the driven flange (22) which is a planet gear to provide an epicyclic gear set. The ring gear (23) may be rotatable or wholly or partially restrained. In alternative embodiments, the transmission member may be the sun gear of an epicyclic gear train or a conical member disposed to receive drive from another conical member connected to the driven flange. In the latter arrangement the two conical members are relatively displaceable to alter the effective gear ratio.</p> |
