Compact large-load central drive type self-adaptive electric drive assembly

Abstract

The invention discloses a compact type large-load central drive type self-adaptive electric drive assembly comprising a rotating output part, a power system and a speed-changing system. A first box body and a second box body are arranged on the two sides of the rotating output part respectively. The speed change system comprises a power input mechanism, a high-speed gear transmission mechanism, alow-speed gear transmission mechanism and a main shaft; the main shaft is sleeved with a main transmission sleeve; a power system, a power input mechanism and the high-speed gear transmission mechanism are installed in the first box body; and the low-speed gear transmission mechanism is installed in the second box body. According to the technical scheme, on the basis of a newly-designed central driving type structure, the assembly has advantages of a hub motor and a side hanging type structure; with full utilization of the internal space of the motor, the structure is very compact and the integration degree is high; and the actual driving working condition and the motor working condition of the pure electric vehicle can be matched in a self-adaptive mode, the efficiency of the motor underthe climbing and heavy load conditions is greatly improved, and the energy consumption of the motor is reduced.

Description

technical field [0001] The invention relates to the technical field of electric drive systems, in particular to a compact large-load central drive type self-adaptive electric drive assembly. 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 vehicles generally adopt hub motors and motor side-mounted structures. [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...

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

Images