Automatic transmission for automotive vehicles
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-003/44
F16H-037/06
출원번호
UP-0555369
(2006-11-01)
등록번호
US-7749128
(2010-07-26)
우선권정보
JP-2005-320060(2005-11-02)
발명자
/ 주소
Kamada, Shinya
Teraoka, Takamichi
Doi, Junichi
Saka, Tokimori
Iwasaki, Tatsuhiko
Sakaue, Naohiro
Mizobe, Tatsutoshi
Fujita, Yoshihiko
Iwashita, Norio
Komori, Satoshi
Ueda, Kazuhiko
Esaki, Seiji
출원인 / 주소
Mazda Motor Corporation
대리인 / 주소
Alleman Hall McCoy Russell & Tuttle LLP
인용정보
피인용 횟수 :
2인용 특허 :
10
초록▼
There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a
There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a single ring gear. Further, the automatic transmission comprises an output wheel arranged coaxially on the first shaft, and capable of outputting torque transmitted from the engine through some of the four planetary gear sets. The output wheel is arranged between two of the four planetary gear sets. Accordingly, the noise or vibration from the planetary gear sets in the automatic transmission may be reduced, while the overall length of the first shaft may be made shorter, and the overall size of the automatic transmission may be made smaller.
대표청구항▼
The invention claimed is: 1. An automatic transmission, comprising: an input shaft capable of receiving torque from an engine; a transmission case rotationally supporting said input shaft; first and second planetary gear sets arranged coaxially on said input shaft, each having a single sun gear and
The invention claimed is: 1. An automatic transmission, comprising: an input shaft capable of receiving torque from an engine; a transmission case rotationally supporting said input shaft; first and second planetary gear sets arranged coaxially on said input shaft, each having a single sun gear and a single ring gear, one of which permanently rotates together with said input shaft, and the other of which is fixed to said transmission case; a gear mechanism arranged coaxially on said input shaft between said first and second planetary gear set, and capable of receiving torque selectively through said first or second planetary gear set; and an output gear arranged coaxially on said input shaft between said first planetary gear set and said gear mechanism and capable of outputting torque from said gear mechanism. 2. An automatic transmission, comprising: an input shaft capable of receiving torque from an engine; a transmission case rotationally supporting said input shaft; first and second planetary gear sets arranged coaxially on said input shaft, each having a single sun gear that is fixed to said transmission case and a single ring gear that rotates together with said input shaft; a gear mechanism arranged coaxially on said input shaft between said first and second planetary gear sets, and capable of receiving torque selectively through said first or second planetary gear set; and an output gear arranged coaxially on said input shaft between said first planetary gear set and said gear mechanism and capable of outputting torque from said gear mechanism. 3. The automatic transmission as described in claim 2, wherein said gear mechanism comprises a third planetary gear set having a single sun gear and a single ring gear, and a fourth planetary gear set having a single sun gear and a single ring gear, some of rotational elements of said third and fourth planetary gear set being permanently connected with each other, and one of said rotational elements of said fourth planetary gear set being coupled to said output gear. 4. The automatic transmission as described in claim 2, further comprising: a second shaft arranged in parallel to said input shaft; and a driven gear coaxially arranged on said second shaft and engaging with said output gear. 5. The automatic transmission as described in claim 4, further comprising a final gear rotationally arranged on said second shaft and capable of transmitting torque from said driven gear to a vehicle driving wheel. 6. The automatic transmission as described in claim 5, wherein said final gear is at least partially overlapped with said first planetary gear set in the axial direction. 7. The automatic transmission as described in claim 6, further comprising a torque converter capable of transmitting torque from said engine to said input shaft, and wherein said first planetary gear set is arranged between said output gear and said torque converter. 8. The automatic transmission as described in claim 2, further comprising a torque converter arranged coaxially with said input shaft and capable of transmitting torque from said engine to said input shaft, and wherein said first planetary gear set is arranged closest to said torque converter in the axial direction among said planetary gear sets. 9. The automatic transmission as described in claim 8, wherein the gear mechanism comprises third and fourth planetary gear sets arranged between said first and second planetary gear sets, and said output gear is arranged between said first and fourth planetary gear sets. 10. The automatic transmission as described in claim 9, wherein said output gear is connected to one of a plurality of rotational elements of said fourth planetary gear set. 11. The automatic transmission as described in claim 10, wherein said output gear is connected to a planetary carrier of said fourth planetary gear set through a first connecting member. 12. The automatic transmission as described in claim 11, wherein one of a plurality of rotational elements of said first planetary gear set is capable of transmitting torque to a sun gear of said fourth planetary gear set through a second connecting member. 13. The automatic transmission as described in claim 12, wherein another one of a plurality of rotational elements of said first planetary gear set is capable of transmitting torque to said third planetary gear sets through a third connecting member. 14. The automatic transmission as described in claim 13, further comprising a support wall formed integrally with said transmission case, and rotationally supporting coaxially said input shaft and said first through third connecting members. 15. The automatic transmission as described in claim 10, wherein at least one of the rotational elements of said third planetary gear set is connected to one of the rotational elements of said fourth planetary gear set. 16. The automatic transmission as described in claim 8, wherein torque from said input shaft is permanently transmitted to ring gears of said first and second planetary gear sets. 17. The automatic transmission as described in claim 16, wherein the gear mechanism comprises third and fourth planetary gear sets arranged between said first and second planetary gear sets, said fourth planetary gear set being closer to said torque converter than said third planetary gear set in the axial direction, said first planetary gear set is capable of transmitting torque to said fourth planetary gear set, and said second planetary gear set is capable of transmitting torque to said third planetary gear set. 18. An automatic transmission, comprising: an input shaft capable of receiving torque from an engine; a transmission case rotationally supporting said input shaft; first and second planetary gear sets arranged coaxially on said input shaft, each having a single sun gear that is fixed to said transmission case and a single ring gear that rotates together with said input shaft; a gear mechanism capable of receiving torque selectively through said first or second planetary gear sets, wherein the gear mechanism includes two single pinion planetary gear sets; and an output gear arranged coaxially on said input shaft between said first planetary gear set and said gear mechanism and capable of outputting torque from said gear mechanism.
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