Planetary reduction stepless variable speed coupling box of new energy automobile

Abstract

The invention relates to a planetary reduction stepless variable speed coupling box of a new energy automobile. The planetary reduction stepless variable speed coupling box comprises a main drive loop formed by motors, planetary reduction mechanisms and a differential mechanism, wherein the motors are connected with sun wheels of the planetary reduction mechanisms through rotor frames to be used as power input, and planet carriers of the planetary reduction mechanisms are connected with the differential mechanism to be used as power output drive wheels. The planetary reduction stepless variable speed coupling box of the new energy automobile further comprises an auxiliary drive device for driving inner gear rings of the planetary reduction mechanisms to rotate. Compared with the prior art, the main drive loop can carry out gear switching of different speed ratios on a planet gearbox according to the working conditions of the inner gear rings, and therefore the whole gear shifting process is continuous, stable and free of impact force, so that stepless variable speed of the automobile in climbing, heavy-load starting, common-load driving at the moderate speed and light-load driving at high speed can be achieved.

Description

technical field [0001] The invention relates to a vehicle gearbox, in particular to a planetary deceleration continuously variable transmission coupling box applied to new energy vehicles. Background technique [0002] With the deterioration of the international environment and the rise of oil prices, new energy vehicles are becoming more and more popular among OEMs all over the world. Among them, pure electric vehicles are currently the only realistic and feasible solution due to their high efficiency and low energy consumption. [0003] Pure electric vehicles are a new type of transportation that uses motors to drive wheels. Because the impact on the environment is relatively small compared with traditional cars, it has a wide range of application prospects and markets, but the current technology is still immature. Among them, the gearbox is an important part of a pure electric vehicle, and its role is to realize the gear switching of the vehicle during driving to meet t...

AI Technical Summary

Problems solved by technology

[0005] At present, most of the pure electric vehicles that have come out are output at a constant speed ratio. Although the motor drive is more efficient than the traditional engine drive, this drive method requires too high a motor speed and torque. There is no way for the motor to have the dual characteristics of high speed and high torque at the same time, so the efficiency of the motor at both ends of the full speed range is not high. At the same time, when starting at low speed and heavy load, it requires high current power supply, which will cause great damage to the power battery. And when the vehicle climbs a slope, because the motor needs to have a higher torque, it makes the vehicle more difficult when climbing a slope, which affects the driving control and comfort of the user.

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