Two-gear transmission for electric vehicle

Abstract

The invention discloses a two-gear transmission for an electric vehicle. The two-gear transmission is applicable to front-engine front-drive or rear-engine rear-drive vehicles, is positioned at the output end of a driving motor, and is of a three-shaft structure. The two-gear transmission comprises an input shaft assembly, an intermediate shaft assembly, an output assembly and a case assembly, wherein rotation central lines of the input shaft assembly, the intermediate shaft assembly and the output assembly are parallel; the input shaft assembly, the intermediate shaft assembly and the output assembly are mounted and supported on the case assembly. According to the two-gear transmission, the transmission efficiency is high, the structure is simple, the transmission ratio is liable to match, and the production and manufacturing cost is relatively low; the transmission torque is large, gear shifting control is accurate, reliability is high, and performance requirements that power is not interrupted during the gear shifting process, the time of the gear shifting process is short, and the gear shifting process is smooth can be met; the lighter driving motor can be adopted, and the cost of the driving motor is reduced; and the driving motor and a transmission system are integratedly designed, so that the comprehensive cost of an electric driving system is greatly reduced, and the loading compatibility on different vehicles is higher.

Description

technical field [0001] This project involves a two-speed transmission for electric vehicles, which belongs to the field of automobile technology. Background technique [0002] With the increasingly serious environmental problems and the depletion of traditional fossil energy, the industry wave of developing electric vehicles has been set off worldwide. In my country's "13th Five-Year Plan", the construction of "Industry 4.0", and the realization of "Made in China 2025" and other national strategic plans, it is clear that electric vehicles are the main strategic orientation for the development of new energy vehicles and the transformation of the automobile industry in my country. [0003] Transmission technology is the core technology of electric vehicles, which directly determines the power and economy of vehicles. At present, the electric vehicles on the market are mainly matched with single-speed reducers. Although they have the advantages of simple structure, small size,...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a two-speed transmission for electric vehicles to solve the problems of the existing single-speed reducer, such as high requirements on the drive motor and relatively low efficiency of the drive motor during driving, so as to increase the cruising range of the electric vehicle while ensuring The shifting power is uninterrupted, the shifting time is short, and the vibration and noise are small, which improves the power and economy of the vehicle, reduces costs, and promotes the industrialization of electric vehicles

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