Automatic synchronous gear shifting system and electric automobile

Abstract

The invention discloses an automatic synchronous shifting system and an electric vehicle, belonging to the technical field of electric vehicles. The automatic shifting system provided by the present invention includes a power mechanism, a deceleration mechanism, a fork mechanism and a shifting mechanism. The deceleration mechanism of the present invention uses a lead screw and a nut sleeve to form a lead screw and nut pair. Compared with the self-locking pin or positioning pin that prevents off-gear in the existing automatic shifting system, the use of the lead screw and nut pair can not only achieve self-locking and The purpose of deceleration also simplifies the structure of the entire shifting system. The present invention also provides an electric vehicle using the above-mentioned automatic shifting system, the automatic synchronous shifting system for electric vehicles not only has a self-locking function, but also has low cost and reliable performance, and also saves the synchronous ring structure, thereby improving The shifting speed is reduced and the shifting shock is reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an automatic shifting system and an electric vehicle applying the automatic synchronous shifting system. Background technique [0002] Electric vehicles refer to vehicles that are powered by on-board power and drive wheels with motors, which are in line with road traffic and safety. Compared with traditional vehicles, electric vehicles have the advantages of less environmental pollution, low noise, simple structure and convenient maintenance. . [0003] The electric vehicle adopts the electronic control system to control the voltage or current of the motor installed on the drive axle of the electric vehicle, so as to realize the control of the driving torque and rotation direction of the motor. Since the motor of the electronic control system can realize the motor reversal, the pure electric vehicle does not need to be equipped with a reverse gear device compared with...

AI Technical Summary

Problems solved by technology

However, if only a single forward gear transmission is installed, it is difficult to meet the driving performance requirements of users and car manufacturers. Therefore, the transmission of electric vehicles is developing in the direction of two gears and multi-speed. Multi-speed transmissions can improve vehicle acceleration performance and make the drive motor work normally. In the high-efficiency range, the power consumption of the motor is reduced, and the cruising range and economy are improved

However, the existing electric vehicle shifting system generally uses a synchronizing ring to realize the synchronization process between the gear sleeve and the engaging teeth. During the shifting process, there are problems such as shifting impact, large shifting force and long synchronization time, and the existing automatic shifting system Generally, there is a device to prevent the gear sleeve from being out of gear, which increases the complexity of the gear shifting system and reduces the reliability of gear shifting.

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