| US 7,582,039 B2 | ||
| Automatic transmission for automotive vehicles | ||
| Tatsuhiko Iwasaki, Hiroshima (Japan); Takamichi Teraoka, Hiroshima (Japan); Tokimori Saka, Hiroshima (Japan); Naohiro Sakaue, Hiroshima (Japan); and Yoshihiko Fujita, Aki-gun (Japan) | ||
| Assigned to Mazda Motor Corporation, Hiroshima (Japan) | ||
| Filed on Nov. 01, 2006, as Appl. No. 11/555,394. | ||
| Claims priority of application No. 2006-004753 (JP), filed on Jan. 12, 2006. | ||
| Prior Publication US 2007/0161453 A1, Jul. 12, 2007 | ||
| Int. Cl. F16H 3/44 (2006.01) | ||
| U.S. Cl. 475—280 [475/281] | 18 Claims |
| 1. An automatic transmission comprising:
a transmission case;
a first shaft housed in, and rotationally supported by, said transmission case, and capable of receiving torque from an engine;
first and second planetary gear sets arranged coaxially on said first shaft, each having a single sun gear that is fixed to
said transmission case and a single ring gear that rotates together with said first shaft;
a gear mechanism arranged coaxially on said first shaft capable of receiving torque selectively through said first or second
planetary gear set;
an output gear arranged coaxially on said first shaft between said first planetary gear set and said gear mechanism and capable
of outputting torque from said gear mechanism; and
a support wall provided inside of said transmission case, said support wall dividing said inside of said transmission case
into a front chamber of a power input side to said first shaft and a rear chamber of its opposite side in the axial direction
of said first shaft;
wherein said output gear is rotationally supported by said support wall; and
wherein said first planetary gear set is housed in said front chamber, while said gear mechanism and said second planetary
gear set are housed in said rear chamber.
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