Double-clutch automatic transmission without reverse gear shaft

Abstract

The invention discloses a double-clutch automatic transmission without a reverse gear shaft. The double-clutch automatic transmission comprises a clutch 1, a clutch 2, an input shaft 1, an input shaft 2, an output shaft 1, an output shaft 2 and a differential gear, wherein the input shaft 1 and the input shaft 2 are coaxial, the input shaft 2 rotates around the input shaft 1; the output shaft 1 is provided with a main reduction gear 2, a reverse gear driving gear, a first gear driven gear, a second gear driven gear, a third gear driven gear and a fourth gear driven gear; the output shaft 2 is provided with a main reduction gear 2, a reverse gear, a fifth gear driven gear, a sixth gear driven gear and a seventh gear driven gear; the third gear and the fifth gear share one driving gear on the input shaft 2, the fourth gear and the sixth gear share the driving gear on the input shaft 1; and the clutch 1 controls the second gear, the fourth gear, the sixth gear and the reverse gear, and the clutch 2 controls the first gear, the third gear, the fifth gear and the seventh gear. By installing one reverse gear driving gear related to low gear on the output shaft 1 and one reverse gear driven gear on the output shaft 2, the reverse gear installation without the reverse gear shaft can be realized; and the transmission has compact structure, light weight and more reasonable speed ratios of gears, thus the transmission can fit more engines and complete vehicles.

Description

technical field [0001] The invention relates to an automatic transmission, in particular to a dual-clutch automatic transmission for a front-transverse front-drive car. Background technique [0002] As the domestic oil supply becomes more and more severe, the requirements of emission regulations become more and more stringent, and the number of non-professional drivers continues to increase, the market needs automatic transmissions with high efficiency, high comfort and low cost. At present, the automatic transmissions used in automobiles can be roughly divided into three categories: one is a hydraulic automatic transmission (AT, Automatic Transmission) composed of a hydraulic torque converter, a planetary gear mechanism and an electro-hydraulic control system; An electromechanical automatic transmission (AMT, Automated Manual Transmission) composed of a fixed-shaft gearbox, a dry clutch and a corresponding electro-hydraulic control system; the other type is a continuously v...

AI Technical Summary

Problems solved by technology

It mentioned in the background technology: the patent No. is the technical solution disclosed in the German patent document DE19821164A, which has a reverse gear meshing structure coupled to the input two shafts and forms a forward gear arrangement elsewhere, known double clutch The transmission includes six forward gears, of which the fourth and sixth gears adopt a constant mesh gear structure, the second gear adopts a simple gear structure, and the second, fourth, and sixth gears are all connected to the input shaft. Simple gear association forms the arrangement of the third and fourth gears, that is, a total of three gear structures; such a gear arrangement, since three gears have been arranged on the input two shafts, the result is that it can no longer be on the input two shafts. Odd number gears are arranged to meet the requirement of adding gears above the sixth gear

Although the technical solution disclosed in the U.S. patent document with the patent number US7225696 achieves the purpose of increasing the gear by rearranging the gears, in the above-mentioned solutions, a reverse shaft is used, which includes two A total of five shafts are used for the input shaft and the two output shafts, which increases the overall weight of the transmission and makes the structure very complicated

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