| 摘要 |
<p>A continuously variable drive ratio transmission includes a support, a first shaft rotatably mounted to the support so that shaft can rotate about a first axis, a helical rack supported by the first shaft so that the rack has a plurality of toothed convolutions facing away from and spaced apart along the first shaft, the diameters of said convolutions being such that together they define a conical envelope encircling the first shaft. A second shaft is rotatably mounted to the support so that the second shaft is spaced from and extends parallel to the envelope, and a gear member is mounted to the second shaft for rotation therewith, the gear member having teeth which mesh with those of the rack. The gear member is slidable along the second shaft so that the gear member may be positioned at any location along the rack.</p> |
