Fixed-axis large-load self-adaptive electric drive assembly in the form of central drive

Abstract

The invention discloses a fixed-axis large-load self-adaptive electric drive assembly in the form of a central drive, which includes a rotating output component, a power system and a speed change system. Both the two-stage transmission sleeve and the secondary transmission sleeve are installed on the rotating output part, and both ends are respectively inserted into the first box body and the second box body, and the two ends of the main shaft respectively pass through the first box body and the second box body Fork fixed connection. Through the newly designed central drive structure, it combines the advantages of hub motor and side-mounted structure; the main shaft is fixedly connected with the fork, and the weight of the vehicle is completely carried by the main shaft, which greatly improves the stability, reliability and durability. ; Make full use of the space inside the motor, the structure is extremely compact, and the degree of integration is high; it can adaptively match the actual driving conditions of pure electric vehicles and the working conditions of the motor, which greatly improves the efficiency of the motor in climbing and heavy load conditions , reducing the energy consumption of the motor.

Description

technical field [0001] The invention relates to the field of transmission technology, in particular to a fixed-axis large-load self-adaptive electric drive assembly in the form of a central drive. Background technique [0002] With the increasingly stringent environmental protection regulations, it is a general trend that new energy vehicles represented by pure electric vehicles, two-wheelers and tricycles will replace traditional fuel vehicles. Existing two-wheeled electric vehicle generally adopts hub motor and motor side-mounted structure. [0003] The in-wheel motor is directly driven by a low-speed DC motor, which not only has relatively low efficiency and high heat generation, but also breaks the original balance of the wheel structure due to the large size and heavy weight of the motor, which will have a certain impact on handling performance and safety. The side-mounted structure puts the motor and the transmission system (gearbox or reducer) on the same side of the...

AI Technical Summary

Problems solved by technology

[0003] The hub motor is directly driven by a low-speed DC motor, which not only has relatively low efficiency and high heat generation, but also breaks the original balance of the wheel structure due to the large size and heavy weight of the motor, which will have a certain impact on handling performance and safety.

The side-mounted structure puts the motor and the transmission system (gearbox or reducer) on the same side of the driving wheel. Although a high-speed motor can be used to improve mechanical efficiency, the weight of the transmission mechanism and the motor is heavy, resulting in unbalanced wheels. Good, especially for two-wheelers

[0004] Due to the limitations of its transmission structure, the existing electric vehicles are completely controlled by the driver based on experience when the driving resistance cannot be accurately known during driving. The actual driving conditions do not match, causing the motor to stall

Especially when the vehicle is under low-speed and heavy-load conditions such as starting, climbing, and headwind, the motor often needs to work at low efficiency, low speed, and high torque, which is likely to cause accidental damage to the motor and increase maintenance and replacement costs. directly affect the battery life

For models with high economic requirements such as electric logistics vehicles, the traditional variable speed transmission structure obviously cannot better meet their use requirements.

[0005] Moreover, the traditional electric drive assembly is composed of mutually independent power system and transmission system, not only the transmission efficiency is not high enough, but also affects the layout of the mechanism, and the volume is relatively large

[0006] Moreover, when the main shaft is used as a power structure, it needs to bear the torque, and when the main shaft is used as a load-bearing structure, it also needs to bear the bending moment (the greater the load of the two-wheeled vehicle, the greater the bending moment), resulting in the stability, reliability and durability. not ideal

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