Double-clutch transmission with short idler shaft

Abstract

The invention discloses a double-clutch transmission with a short idler shaft. Particularly, the double-clutch transmission comprises seven forward gears, a reverse gear, four synchronizers and the short idler shaft, each synchronizer is selectively connected with two gears, and a driving gear of each gear in the transmission is an independent gear. The double-clutch transmission has the advantages that by the design of the transmission structure with the seven forward gears, the transmission has better economical efficiency and power performance; arrangement of the seven forward gears and the reverse gear is more reasonable; each synchronizer is effective on the two gears simultaneously, so that the synchronizers are fully utilized; all the driving gears are the independent gears, so that tooth number design is facilitated, and convenience is brought to speed ratio matching; by the short idler shaft structure, space of the transmission is saved, stiffness is good, and deflection deformation is avoided; the short idler shaft is connectively butted against a shell of the transmission, additional supporting design is not required, the shell of the transmission is reasonable in design, and overall firmness is improved.

Description

technical field [0001] The invention relates to a dual-clutch gearbox, in particular to a dual-clutch gearbox with seven forward gears and a short idler shaft. Background technique [0002] The concept of dual clutch transmission (DCT) has a history of sixty or seventy years. As early as 1939, Germany's Kegresse.A was the first to apply for a patent for a dual-clutch transmission, and proposed the design concept of dividing the manual transmission into two parts. One part transmits odd-numbered gears, and the other part transmits even-numbered gears. A clutch connects the two input shafts, and the driven gears of adjacent gears mesh with the gears of the two input shafts. Cooperating with the control of the two clutches, the transmission ratio can be converted without cutting off the power, thereby shortening the shifting time and effectively improving the gear ratio. Shift quality. [0003] China's auto market will undergo significant changes in the next few years: regula...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, a known dual-clutch gearbox is mentioned in CN1621715, which is designed for six forward gears, and adopts a short idler shaft and three sets of double-link mechanisms, image 3 It is a schematic diagram of the layout of the short idler shaft. The short idler shaft is located in the middle of the gearbox, and a support seat is required to accommodate the shaft of the short idler shaft in the gearbox. The support seat protrudes from the outside of the clutch housing. The connection of the box leads to low overall firmness, which easily affects the service life of the gearbox and clutch housing; compared with the design of seven forward gears, the design of six forward gears has lower economy and power, and higher engine efficiency loss; Three sets of double-linkage mechanisms increase the difficulty of gear ratio, and it is difficult to meet the requirements of the speed ratio of the whole vehicle

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