| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic transmission capable of being axially miniaturized while preventing degradation of controllability of a clutch.SOLUTION: Three axial oil passages a11, a21, a31 are formed on positions eccentric from the center of an input shaft 40 of an automatic transmission 1, and one first radial oil passage a12 is formed from the axial oil passage a11 to an outer peripheral side in the radial direction. A sleeve portion 70a on which a second radial oil passage a13 is formed on a position axially corresponding to the first radial oil passage a12, is disposed at an outer peripheral side of the input shaft 40, and a sleeve portion 52A on which a third radial oil passage a15 is formed on a position axially corresponding to the second radial oil passage a13, is disposed at an outer peripheral side of the sleeve portion 70a. By forming the second radial oil passage a13 and the third radial oil passage a15 by two or more, and reducing a diameter of the first radial oil passage a12, throttle effect is prevented, and axial miniaturization can be achieved. |
