Electric vehicle powertrain based on continuously variable transmission

Abstract

The invention provides an electric car power assembly based on a continuously variable transmission. The electric car power assembly comprises a motor, the continuously variable transmission and a speed change control device. An output shaft of the motor is connected with an input shaft of the continuously variable transmission through a clutch, the continuously variable transmission comprises a base wheel and an output wheel, and a plurality of fan-shaped grooves are formed in the base wheel. A fan-shaped disc is arranged in each fan-shaped groove and can move in the fan-shaped groove. Grooves are formed in the outer circles of the fan-shaped discs and the output wheel, and the fan-shaped discs and the output wheel are connected through transmission elements. Mounting holes are formed inthe fan-shaped discs, cams are mounted in the mounting holes and used for pushing the fan-shaped discs to move in the fan-shaped grooves of the base wheel, and the speed change control device is connected with the cams to control rotation of the cams so as to adjust the outer diameters of the fan-shaped discs to change the speed of the output wheel. According to the electric car power assembly based on the continuously variable transmission, the rated torque of the motor can be effectively decreased, the weights and sizes of a battery and the motor are greatly decreased, and the problem that amotor and a battery of an electric car are too large can be solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to an electric vehicle power assembly based on a continuously variable transmission. Background technique [0002] With the rapid development of science and technology, people's quality of life has been significantly improved. Cars have become an indispensable means of transportation for people to travel. People pay more and more attention to the economy, comfort and environmental protection of cars; In the current increasingly tense situation, some countries have formulated a timetable for stopping the production and sales of traditional energy vehicles, and people are paying more and more attention to the protection of resources and the environment. Electric vehicles have entered people's sight because of their low pollution and low energy consumption, and they have very good development prospects. [0003] In the development and design process of a car, the powertrain ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides an electric vehicle based on a continuously variable transmission that can realize the adjustment of the speed ratio of the electric vehicle, can greatly reduce the weight and size of the battery and the motor, and can solve the problem of the electric vehicle motor and battery being too large. Automotive Powertrain

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