Central driving type super-large load intelligent self-adaptive electric driving system

Abstract

The invention discloses a central driving type super-large load intelligent self-adaptive electric driving system which comprising a motor, a high-speed gear transmission mechanism, a low-speed gear transmission mechanism and a central output mechanism. According to the scheme, compared with the traditional single-row type overrunning clutch, the multi-row type overrunning clutch has the advantages that the load bearing capacity is improved exponentially and the bearing limit of the traditional overrunning clutch is broken through; with a brand-new transmission path, a central output type structure is achieved; a high-speed motor can be adopted and the overall balance is good, the reliability is high, so that the system is suitable for more application scenes. Meanwhile, ae spiral transmission pair is arranged at an outer position, so that the assembly is easier; and thus under the condition that the driving force is not cut off, gear shifting and speed changing are automatically carried out along with driving resistance changes in a self-adaptive mode, so that the motor is always located on an efficient platform as much as possible, and the efficient operation interval of the motor is greatly increased.

Description

technical field [0001] The invention relates to the technical field of electric drive systems, in particular to a centrally driven super-large load 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] Moreover, 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 efficien...

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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