Central integrated electric drive axle assembly with two motors and two speed reducers

Abstract

The invention provides a central integrated electric drive axle assembly with two motors and two speed reducers. The assembly is matched with the two driving motors and two speed reducer assemblies, and the driving motors and the two speed reducer assemblies can provide power for a whole vehicle at the same time or one of the driving motors and the speed reducer assemblies provides power for the whole vehicle according to demands; by selecting the motors with different parameters in power, torque, efficiency distribution and the like and the speed reducer assemblies which are matched with themotors and are different in speed ratio for use, four driving modes can be provided for the whole vehicle. The two driving motors are both high-speed motors, so that the torque is reduced on the premise of same power, and the weight and cost of the motors are reduced; in order to meet the requirement of the maximum climbing gradient of the whole vehicle, the two motors small in torque and high inrotation speed can be matched with the speed reducers with high speed ratios respectively, so that a large enough driving force is provided for the whole vehicle. Meanwhile, according to the conditionof the whole vehicle, the parameters such as power, torque and efficiency distribution of the two motors are reasonably selected, and the speed ratios of the speed reducers connected with the two motors are reasonably matched, so that an optimal driving mode is provided for the whole vehicle under the conditions of different loads, different vehicle speeds, different road conditions and the like.

Description

Technical field [0001] The invention belongs to the field of electric drive axle assemblies, and particularly relates to a centrally integrated electric drive axle assembly with dual motors and double reducers. Background technique [0002] At present, the motor integrated drive axle mainly has four schemes: single-motor matching reducer, single-motor matching transmission, dual-motor matching reducer, and dual-motor matching transmission. Among them, the single-motor matching reducer solution can simultaneously meet the maximum gradeability and The maximum speed has limitations and is suitable for small tonnage vehicles; the single-motor matching transmission scheme is not easy to achieve when it meets the requirements of larger tonnage vehicles, which is affected by power, system weight, and system cost; the dual-motor matching transmission scheme is more suitable for large-tonnage vehicles The application can not only meet the power requirements of the entire vehicle, but also...

AI Technical Summary

Problems solved by technology

[0002] Currently, motor-integrated drive axles mainly include four schemes: single-motor matching reducer, single-motor matching transmission, double-motor matching reducer, and double-motor matching transmission. There are limitations in the maximum speed, which is suitable for small-tonnage vehicles; the single-motor matching transmission scheme is not easy to realize due to the influence of power, system weight, system cost, etc. when meeting larger-tonnage vehicles; the dual-motor matching transmission scheme is more suitable for large-tonnage vehicles application, it can not only meet the power requirements of the vehicle, but also meet the maximum gradient and maximum speed requirements of the vehicle through the setting of the gearbox speed ratio. This solution is heavy and costly; while the dual motor matching reducer solution currently only The side drive scheme is mainly used in low-floor new energy buses with a low maximum speed, and its structure and performance cannot meet the application of pure electric trucks

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