| 摘要 |
An automatic transmission includes an input first rotating member (3), an output second rotating member (6) coaxial with the first rotating member (3) , a third rotating member (8) coaxial with the first rotating member (3), and a rotation transmitting element (10) mounted on the third rotating member (8) to transmit rotation of the first rotating member (3) to the second rotating member (6) so that the second rotating member (6) is rotated at a predetermined reduction ratio exceeding rotation of the first rotating membe r (3) in a stopped state of the third rotating member (8) in a direction of rotation of the first rotating member (3). The reduction ratio is increased as a difference between numbers of revolution of the first and third rotating members (3, 8) is rendered larger.
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