| 摘要 |
<p>In order to increase the ratio coverage without leading to an increase in size, the speed of the rotation that has been changed by a primary transmission mechanism is then decreased or increased by a secondary transmission mechanism, after which the rotation is transmitted to an output shaft. On a first shaft, low transmission gears and high transmission gears are arranged. On a second shaft that is parallel to the first shaft, driven-side low transmission gears, which continuously engage the aforementioned low transmission gears, and a secondary transmission first gear, are arranged. On a cylindrical third shaft provided on the outer circumferential side of the second shaft, driven-side high transmission gears, which continuously engage the aforementioned high transmission gears, and a secondary transmission second gear, are arranged. On the output shaft, a secondary transmission first driven gear, which continuously engages the secondary transmission first gear, and a secondary transmission second driven gear, which continuously engages the secondary transmission second gear and has a smaller diameter than the secondary transmission first driven gear, are arranged. The rotation of the low transmission gears and the high transmission gears can be selectively transmitted.</p> |
