DUAL-CLUTCH AUTOMATIC TRANSMISSION

摘要

A dual-clutch automatic transmission having seven forward gears and one reverse gear, wherein a seventh-gear driving gearwheel, a first-gear driving gearwheel, a fifth-gear driving gearwheel and a third-gear driving gearwheel are individually and fixedly arranged on a first input shaft, a fourth-gear driving gearwheel and a second-gear driving gearwheel are individually and fixedly arranged on a second input shaft, driven gearwheels respectively and correspondingly engaged with the driving gearwheels are rotatably supported on the first output shaft and the second output shaft. The fourth-gear driving gearwheel is also used as a sixth-gear driving gearwheel, and the gear sets of other gears are not shared, which is conducive to decrease the overall axial length of the transmission, facilitates full vehicle arrangement, and prevents the speed ratio ranges of other gears from being influenced by sharing of these gear sets to adapt to more vehicle models. In addition, the arrangement of a parking ratchet wheel is optimized in the present invention, the stress distribution on the output shafts can be more even, and thus the stability is improved and the service life is prolonged.

主权项

1. A dual-clutch automatic transmission, comprising:
a first input shaft having a first end and a second end opposite to the first end of the first input shaft; a first clutch connected to the first input shaft at the first end of the first input shaft; a second input shaft having a first end and a second end opposite to the first end of the second input shaft; wherein the second input shaft is a hollow shaft and is sleeved on the first input shaft; a second clutch connected to the second input shaft at the first end of the second input shaft; a seventh-gear driving gearwheel, a first-gear driving gearwheel, a fifth-gear driving gearwheel and a third-gear driving gearwheel, which are individually arranged and are fixedly connected to the first input shaft; a fourth-gear driving gearwheel and a second-gear driving gearwheel, which are individually arranged and are fixedly connected to the second input shaft; wherein, the fourth-gear driving gearwheel is also used as a sixth-gear driving gearwheel, and the second-gear driving gearwheel is also used as a reverse-gear driving gearwheel in order to omit a reverse-gear shaft; a first output shaft and a second output shaft on which driven gearwheels respectively engaged with the corresponding driving gearwheels are rotatably supported; and a parking ratchet wheel.