| 摘要 |
A power transmission mechanism having an hourglass worm with a continuous tooth groove. Cooperating with the hourglass worm is a wheel device having a plurality of recesses therein spaced around its circumference with the spacing between the recesses corresponding to a pitch of the continuous tooth groove. A roller is mounted in each of the recesses for rotation in a transverse direction with respect to the circumference of the wheel device and is in meshing engagement with the continuous groove. Each roller is formed from a pair of disc rollers. |
