| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve fuel consumption performance by reducing the influence of dragging at a brake part in an automatic transmission. <P>SOLUTION: The automatic transmission 1 includes: clutches C1 and C2; a clutch drum 2; pistons 3 and 4; and a brake B2. The clutch drum 2, the clutch C1, the clutch C2 and the brake B2 are arranged in sequence in an interior space formed by joining a transmission case 200 to a rear case 201 in an axial direction from the rear case side. A separating/guiding wall 401 that is provided in a circumferential direction so as to define a surplus lubricating oil trapping space 400 that gathers on an inner peripheral surface of the transmission case 200 and a second brake B2 and causes a trapped surplus lubricating oil guided into the surplus lubricating oil trapping space 400 to flow downward in the circumferential direction, and a holding mechanism 402 for restricting movement in axial/rotation direction of the separating/guiding wall 401 are provided in relation to spline fitting portions formed on the inner peripheral surface of the transmission case 200. <P>COPYRIGHT: (C)2010,JPO&INPIT |
