DUAL-CLUTCH AUTOMATIC TRANSMISSION

摘要

A dual-clutch automatic transmission has seven forward and one reverse gear. A seventh driving gear (17), a first driving gear (11), a fifth driving gear (15) and a third driving gear (13) are fixedly arranged on the first input shaft (1) independently; a fourth driving gear (24) and the second driving gear (22) are fixedly arranged on a second input shaft (2) independently; driven gears meshed with the above driving gears correspondingly are sleeved on the first output shaft (3) and the second output shaft (4). The fourth driving gear (24) is meanwhile served as a sixth driving gear and other gear sets are not shared, thereby, the transmission has the advantages of enabling the overall axial length of the transmission to be reduced, being convenient for arrangement of a vehicle, enabling speed ratio ranges of other gears to be not influenced by sharing of a gear set, and being adapted to more vehicle types; additionally, optimizing arrangement of parking ratchet wheels (11a, 11b); also enabling force distribution of the output shafts to be more uniform, improving stability and prolonging service life.