Central drive smart self-adaptive electric drive system

Abstract

The invention discloses a central drive type intelligent self-adaptive electric drive system, which comprises a motor, an self-adaptive transmission assembly and a central output mechanism. Adopting the above technical scheme, the structure is extremely compact, the degree of integration is high, the space inside the motor is fully utilized, and some parts of the transmission mechanism can be installed inside the motor. Not only is the transmission line short, the transmission efficiency is high, and it is also conducive to the layout of the power mechanism. Reduce the impact on the dynamic balance of the wheel; and adopt a new transmission path to realize the central output structure, not only can use high-speed motors, but also have good overall balance, high reliability, and adapt to more application scenarios; thus in Without cutting off the driving force, the self-adaptive and automatic gear shifting changes with the change of driving resistance, so that the motor is always on the high-efficiency platform as much as possible, which greatly increases the range of high-efficiency operation of the motor.

Description

technical field [0001] The invention relates to the technical field of electric drive systems, in particular to a centrally driven intelligent self-adaptive electric drive system. Background technique [0002] With the increasingly stringent environmental protection regulations, it is the general trend that new energy vehicles represented by pure electric vehicles, motorcycles and tricycles will replace traditional fuel vehicles. [0003] At present, the electric drive systems of automobiles, motorcycles and tricycles powered by pure electricity are composed of two independent parts, the motor and the reduction box (gearbox or transmission box). Not only the transmission efficiency is not high enough, but also the layout of the mechanism is affected. [0004] The motor generally adopts the installation method of hub motor or side-mounted structure. The hub motor is directly driven by a low-speed DC motor, which not only has relatively low efficiency and high heat generation...

AI Technical Summary

Problems solved by technology

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

[0005] Moreover, due to the limitations of its transmission structure, the existing electric vehicle is completely controlled by the driver based on experience when the driving resistance cannot be accurately known during the driving process. Therefore, it is often inevitable that the motor working state and traffic The actual driving conditions of the tool 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

[0006] Moreover, the traditional roller overrunning clutch has limited load capacity, and the only way to increase the load capacity is to increase the size of the outer ring, inner wheel and rolling body, but the inner wheel and rolling body cannot be infinitely extended, especially the thinnest If the roller is too long, not only is it prone to uneven force, it may cause breakage, and it is difficult to guarantee the machining accuracy, and it is prone to poor meshing, which makes production difficult and the yield rate is low. At the same time, the requirements for materials are extremely high. , high production costs

Therefore, the existing self-adaptive automatic transmission device cannot withstand super large loads, the manufacturing cost remains high, and the reliability is insufficient.

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