Center-driven adaptive electric drivetrain with multi-plate friction clutch

Abstract

The invention discloses a central drive type self-adaptive electric drive assembly with a multi-plate friction clutch. The central drive type self-adaptive electric drive assembly comprises a rotary output component, a power system and a speed change system, and the power system drives the output component through the speed change system. By the adoption of the technical scheme, through the newly-designed central drive type structure, the advantages of a hub motor and a side hanging type structure are achieved at the same time, the defects of the hub motor and the side hanging type structure are overcome, and the hub motor is particularly suitable for two-wheeled vehicles; moreover, the friction structure of the multi-plate type friction clutch is provided with a plurality of outer friction plates and inner friction plates which are alternately arranged, so that the borne torque is dispersed on the outer friction plates and the inner friction plates, abrasion is shared through the outer friction plates and the inner friction plates, the sliding friction loss is greatly reduced, the defects of a traditional disc type friction clutch are overcome, therefore, the wear resistance, thestability and the reliability of the friction clutch are greatly improved, the service life is prolonged, and the friction clutch can serve as a large-torque power transmission device.

Description

technical field [0001] The invention relates to the technical field of electric drive systems, in particular to a centrally driven self-adaptive electric drive assembly with multi-plate friction clutches. 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 ...

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] In order to solve the above problems, the inventor team of this case designed a series of cam adaptive automatic transmission devices, which drive the cams by driving resistance to achieve the purpose of automatic gear shifting and adaptive matching of vehicle speed output torque according to the driving resistance, which has a good application effect ; Although the aforementioned cam adaptive automatic transmission has the above-mentioned advantages, its stability and high efficiency are greatly improved compared with the prior art, but the structure of some parts is relatively complicated, the volume of the transmission is large, and the deformation of the long-term running parts is obvious, and there is no stability. support, resulting in high operating noise, affecting operating comfort and affecting transmission efficiency, resulting in high energy consumption; moreover, the fast and slow gear engagement and separation mechanism have a long axial joint surface stroke, and the separation and engagement are not thorough enough, which is not conducive to improving transmission accuracy. After periodic use, it will affect the overall shape and position tolerance, thus affecting the stability of the transmission

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