Parallel axes type automatic transmission

Abstract

The present invention provides a three-input-axis and one-output-axis parallel axis type automatic speed variator which can reduce the amount of the lubricant oil dispersing in the casing and can be miniaturized, and the automatic speed variator comprises a first input axis (6) which inputs the power from the power source, a second input axis which inputs the power through the first input axis (6) and a third input axis (10), and an output shaft. A plurality of wet-type multiple disc clutch for varying velocity are dispersedly arranged on the input axis, each input axis is axially supported with a driving gear connected with the wet-type multiple disc clutch arranged on each input axis, and a plurality of driven gears are fixed on the output axis. The number of the wet-type multiple disc clutches which are arranged on each input axis for speed varying is as follows: the number on the first input axis is above m, the number on the second input axis is above n, the number on the third input axis is less than m, wherein m is an integer above 2, and n is an integer above 3. The second input axis is arranged at the highest position, the first input is arranged at the middle position and the third input axis is arranged at the lowest position.

Description

technical field [0001] The present invention relates to a parallel shaft automatic transmission with three input shafts. Background technique [0002] Parallel shaft automatic transmission, between the input shaft and the output shaft arranged parallel to each other, a plurality of gear trains for speed change composed of the drive gear on the input shaft and the driven gear on the output shaft are arranged side by side, and each gear train One of the driving gear and the driven gear is supported on the corresponding shaft, and is connected with each gear row (for speed change) wet multi-disc clutch installed on the shaft, and is connected by selectively connecting each wet multi-disc clutch , so that the rotation of the input shaft is transmitted to the output shaft through the corresponding gear train, and the output is taken out through the final reduction drive gear fixed on the output shaft, with the same number of wet multi-disc clutches as the number of shifting stage...

AI Technical Summary

Problems solved by technology

[0004] However, this parallel shaft type automatic transmission has a problem that the size reduction of the automatic transmission is not sufficient due to limited conditions such as the condition of the mating surface of the automatic transmission and the engine and the space when it is mounted on a vehicle.

In addition, splashes of lubricating oil from wet multi-disc clutches attached to each input shaft spread to the inner wall of the housing, causing aeration, or further increasing friction.

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