| 摘要 |
PROBLEM TO BE SOLVED: To more favorably improve strength of a supporting member for rotatably supporting a counter drive gear to which power from a transmission is transmitted, while suppressing an increase in size of a power transmission device.SOLUTION: A power transmission device 20 includes: a brake B2 for fixing a planetary carrier 39 of a second planetary gear mechanism 35 of an automatic transmission 25 in a transmission case 22 in an unrotatable manner; and a supporting member 100 for rotatably supporting a counter drive gear 41 and fixed at the transmission case 22. The supporting member 100 includes: a cylindrical boss part 101 for rotatably supporting the counter drive gear 41; a wall part 102 extended radially outward of the automatic transmission 25 from one end of the boss part 101; and a cylindrical first drum part 111 extended in the same direction as the boss part 101 and also in an axial direction from the wall part 102, and functioning as a brake drum of the brake B2. |
