Double-motor electric drive axle assembly with hub reduction gear

Abstract

The invention provides a dual-motor electric drive axle assembly with a hub reduction gear. The dual-motor electric drive axle assembly comprises a first drive motor M1 and a second drive motor M2 which are distributed on the two sides of an axle. The first driving motor M1, the first gear transmission speed reduction module, the second gear transmission speed reduction module and the third gear transmission speed reduction module are connected in sequence, and the power output of the first driving motor M1 transmits power to the third gear transmission speed reduction module through the first gear transmission speed reduction module and the second gear transmission speed reduction module in sequence; and the power output of the second driving motor M2 transmits the power to the third gear transmission speed reduction module through the fourth gear transmission speed reduction module and the fifth gear transmission speed reduction module in sequence to be converged with the power of the first driving motor M1. Driving force is coupled differently at different vehicle speeds and under different loads, real-time power distribution is achieved, and the power performance of the whole vehicle is improved; single-motor driving is achieved under common working conditions, the motor load rate is increased, and the whole vehicle economy is improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a dual-motor electric drive axle assembly with a pulley side reducer. Background technique [0002] From the perspective of the current development trend of new energy vehicle electric drive system technology, it is generally developing in the direction of power system integration and integration. Domestic and foreign car companies have integrated drive motors, gearboxes, reducers, axles, etc. as electric drive assembly products. Through the integrated design, on the one hand, the volume and weight of the assembly can be further reduced, and the power, volume, and torque density of the system can be improved; It can improve the versatility of products and reduce the cost of development and production. [0003] At present, electric drive axles of new energy commercial vehicles mostly adopt single-motor matching AMT gearboxes, single-motor matching reducers, double-mo...

AI Technical Summary

Problems solved by technology

[0003] At present, electric drive axles of new energy commercial vehicles mostly adopt single-motor matching AMT gearboxes, single-motor matching reducers, double-motor matching reducers, and double-motor matching AMT gearbox solutions, and most of them are single-motor solutions. The degree is low, which is reflected in the following: the powertrain occupies a large space and is heavy in weight. In order to meet the complex working conditions, a single motor considers a large design margin, and a large power motor is often used. However, in most cases, the demand The power is small, resulting in the actual load rate of the motor at a low level, and the drive motor runs in the low-efficiency area for a long time, resulting in high energy consumption of the vehicle

The dual-motor matching scheme is mainly based on wheel-side motors, without a central differential. For electric vehicles with high speed and frequent steering, the stability is poor and the tires are severely worn.

However, the dual-motor matching AMT scheme has not yet been popularized and applied in large quantities, and most of them use two sets of motors to match two sets of AMT, which is heavy, poor in shifting reliability, and difficult to control the system

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