| 摘要 |
PURPOSE:To realize a small-sized and inexpensive transmission by connecting each revolution transmission element having different outer diameter onto an eccentric shaft through an Oldham's coupling in rotatable ways and selectively taking out the revolution from one among the revolution transmission elements. CONSTITUTION:An eccentric shaft 3 consists of a large-diameter part 3a, middle- diameter part 3b, and a small-diameter part 3c, and a large-diameter gear 4a is rotatably fitted onto the large-diameter part 3a, and a middle-diameter gear 4b is fitted onto the middle-diameter part 3b, and a small-diameter gear 4c is fitted onto the small-diameter part 3c. Further,the first Oldham's coupling 5a is interposed between the large-diameter gear 4a and the middle-diameter gear 4b, and the second Oldham's coupling 5b is interposed between the middle- diameter gear 4b and the small-diameter gear 4c. A transmission gear 11 on the trailing side spline shaft 10 installed in parallel to the eccentric shaft 3 selectively meshes with each gear 4a, 4b, 4c, and a driving side gear 12 meshes with the large-diameter gear 4a at all times. |
