Reverse gear type three-gear transmission for electrocar

Abstract

The invention discloses a reverse gear type three-gear transmission for an electrocar. The reverse gear type three-gear transmission for the electrocar comprises a variable speed transmission system and a power input component, wherein the variable speed transmission system is provided with a power input shaft; power can be input to the power input shaft by the power input assembly in a forward-direction and reverse-direction switching mode; and the variable speed transmission system is a three-gear variable speed system. The reverse gear type three-gear transmission for the electrocar, which is disclosed by the invention, has a reverse gear function, so that the whole transmission has a compact and simple structure and a smaller size, the application range of the transmission is increased, a complex motor positive and negative rotation control system is omitted, the service life of the motor and the transmission system is prolonged, and the electrocar cost is lowered. In addition, a reverse gear mechanism and a forward gear mechanism can share the transmission so as to realize the thrust augmentation or acceleration of the reverse gear; the three-gear structure transmission is adopted, power output is reasonably blended when the electrocar is driven on a flat ground and climbs so as to further cause connection between gear positions to be smooth and stable; power consumption during climbing is reduced; the driving and the gear change of the electrocar can be smoother and more stable; and the use cost is lowered while purposes of energy saving and environment protection are realized.

Description

technical field [0001] The invention relates to a motor vehicle component, in particular to a reverse gear type three-speed transmission for an electric vehicle. Background technique [0002] Electric vehicles (two-wheel, three-wheel and electric vehicles) are powered by on-board power batteries to drive electric vehicles. Due to the characteristics of energy saving, environmental protection and lightness, and low cost of use, electric vehicles have received more and more attention. [0003] Electric vehicles generally include power supply, motor, transmission, walking assembly and control system. Due to the operating characteristics of the motor, especially for compact, light and flexible two-wheeled or three-wheeled electric vehicles, the transmission not only does not have gears, And there is no reverse gear, so the operation is extremely inconvenient, especially for three-wheeled electric vehicles, when pulling and transporting goods, it needs a larger external force to ...

AI Technical Summary

Problems solved by technology

[0003] Electric vehicles generally include power supply, motor, transmission, walking assembly and control system. Due to the operating characteristics of the motor, especially for compact, light and flexible two-wheeled or three-wheeled electric vehicles, the transmission not only does not have gears, And there is no reverse gear, so the operation is extremely inconvenient, especially for three-wheeled electric vehicles, when pulling and transporting goods, it needs a larger external force to assist in reversing; The reverse of the motor is realized, which requires a relatively complicated control system, which is extremely costly, and for the motor, it will greatly affect its service life and reduce the transmission efficiency

[0004] In the prior art, if the existing motor vehicle reverse gear structure is used on the electric vehicle, it will be more complicated, and the volume of the transmission will increase a lot, which is obviously not suitable for light and flexible models such as three-wheeled electric vehicles.

[0005] At the same time, the transmissions of electric vehicles generally do not adopt gear shifting, and directly control the speed of the vehicle by controlling and adjusting the motor speed; and for uphill sections with large output torque, the existing single transmission structure can only be used to increase the power output to reach The purpose of climbing will cause a lot of waste of electricity, and because the structure of the transmission is more concerned with driving on flat ground, the effect achieved by increasing the power output for climbing is not ideal, and sometimes even occurs Motor stall phenomenon

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