| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight and to miniaturize a mechanism against a speed- change stage number by shortening a high torque transmission route in a multi- stage automatic transmission. SOLUTION: The automatic transmission is provided with a planetary gear set G for outputting a plurality of speed-change rotations making a speed- reduction rotation and a non-speed-reduction rotation as an input; a speed- reduction planetary gear G1; an input shaft 11; first and third clutches C-1, C-3 for attachably/detachably connecting the input shaft 11 to two different speed-reduction input elements S2, S3 through the speed-reduction planetary gear G1 respectively; and a second clutch C-2 for attachably/detachably connecting the input shaft 11 to a nonspeed-reduction rotation input element C2 (C3) of the planetary gear set G. The first and third clutches C-1, C-3 are together disposed and the second clutch C-2 is disposed at an opposite side of the planetary gear set G to the speed-reduction planetary gear G1.
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