Two-clutch double-row planetary gear four-gear automatic transmission

Abstract

The invention discloses a two-clutch double-row planetary gear four-gear automatic transmission. The transmission comprises an input shaft, input end double clutches, a front shaft assembly, a box body, a first planetary row, a second planetary row, a rear shaft assembly, output end double clutches and an output shaft, wherein the input end double clutches comprise a first clutch and a second clutch, the front shaft assembly comprise a first sun wheel front shaft and a first front planet carrier front shaft, the first planetary row comprises a first sun gear, a first front planet carrier, a first rear planet carrier, a first planetary gear shaft, a first planetary gear and a first gear ring, the second planetary row comprises a second gear ring, a second planetary gear, a second planetarygear shaft, a second planet carrier and a second sun gear, the rear shaft assembly comprises a second sun gear rear shaft and a second planet carrier rear shaft, and the output end double clutches comprise a third clutch and a fourth clutch. According to the transmission, the clutches are arranged outside the box body, the churning loss of a gearbox is reduced, the efficiency of the planetary geartransmission is very high, the multi-gear adjustment of the transmission is realized, so that the chance that a motor works in a high-efficiency area is increased, the economy of the whole vehicle isimproved, and the driving mileage is increased.

Description

Technical field: [0001] The invention relates to the technical field of vehicles, in particular to a four-speed automatic transmission with two dual-clutch dual-row planetary gears. Background technique: [0002] The low-speed torque of the motor of a pure electric vehicle is very large, and the efficiency of the motor is extremely low at this time. Therefore, the electric vehicle consumes a lot of electricity when starting, accelerating and climbing a steep slope at low speed, and it will also make the motor heat. In hilly areas, mountain cities or congested cities The cruising range of electric vehicles is shortened a lot. This requires the use of a gearbox to reduce the heating of the motor, reduce energy consumption, increase the cruising range, and improve vehicle dynamics. If there is no need to improve the power performance, the power of the electric motor can be reduced to further save energy, increase the cruising range, and simplify the cooling system of the elect...

AI Technical Summary

Problems solved by technology

The disadvantage is: the economy of electric vehicles is not high at low speed and high speed

[0004] At present, there are also some electric vehicles using various two-speed transmissions, but due to the low efficiency of the transmissions used and the limited improvement of the vehicle economy by the two-speed transmissions, the economic efficiency of the vehicle is not high

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