Four-speed mid-mounted chain transmission electric drive adaptive transmission system

Abstract

The invention discloses a four-speed center-mounted chain drive electric drive self-adaptive transmission system. The power input mechanism transmits power to the outer intermediate shaft through the high-speed gear transmission mechanism or the low-speed gear transmission mechanism, and the outer intermediate shaft passes through the chain transmission in turn. The components and the two-speed transmission transmit power to the drive wheels. Using the above technical scheme, the power input mechanism, the high-speed transmission mechanism and the low-speed transmission mechanism are set in the middle of the original two-wheeled vehicle, and a two-speed transmission mechanism is added at the position of the driving wheel, which not only forms a four-speed transmission, but also prolongs the deceleration. The transmission path increases the reduction ratio, so that a high-speed motor can be used as the drive while retaining the chain transmission method, and it can adaptively match the actual driving conditions and motor conditions of the electric vehicle according to the resistance situation.

Description

technical field [0001] The invention relates to the technical field of electric drive systems for two-wheel vehicles, in particular to a four-speed mid-mounted chain drive electric drive self-adaptive variable speed system. Background technique [0002] The design structure of the chain drive has the advantages of simple structure, light weight, low cost, etc., and the advantage that the final reduction ratio can be easily changed by replacing the sprocket, so it is adopted by most two-wheeled vehicles. In addition, the chain can buffer the impact of acceleration and deceleration of the vehicle, and can also reduce the change in the distance between the sprockets caused by the up and down vibration of the suspension system. [0003] The existing two-wheeled electric drive system capable of shifting gears usually sets the power input mechanism (motor, etc.) and the deceleration and shifting mechanism in the middle of the two-wheeled vehicle (below the seat), and then directly...

AI Technical Summary

Problems solved by technology

Since the speed of the motor is much higher than that of the internal combustion engine, the reduction mechanism is relatively complicated and the volume is large

However, due to the structural characteristics of the two-wheeled vehicle, the installation space is extremely limited, and it is difficult to install a deceleration and shifting mechanism with a large reduction ratio. Therefore, it is impossible to use a high-speed motor, and the efficiency of the motor is always not ideal, which affects the cruising range.

[0004] Moreover, the existing two-wheeled electric drive system cannot automatically shift gears according to the resistance, so it cannot adaptively match the vehicle speed output torque according to the driving resistance

In order to ensure the performance and energy consumption of ordinary road conditions, the electric two-wheeled vehicle does not have strong climbing and heavy load capabilities, so that the motor is not on a high-efficiency platform when the electric two-wheeled vehicle is climbing and heavy-loading, so that the motor not only Inefficient and consumes too much energy

[0005] Moreover, the gears of the electric drive system of two-wheeled vehicles are generally less, and at most only two gears can be shifted, which cannot meet some application requirements.

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