Dual-motor electric drive axle with hub reduction gear

Abstract

The invention provides a dual-motor electric drive axle with a hub reduction gear and relates to the technical field of new energy vehicles. The electric drive axle comprises a first drive motor, a second drive motor, an axle shell, a planet carrier, a first half shaft, a second half shaft and a differential mechanism, wherein the first drive motor and the second drive motor are respectively arranged on two sides of the axle shell; two sets of driving motor modules distributed on the two sides of an axle are connected with a two-gear gear shifting module sharing an axle assembly module through a transmission module, power is distributed to two half shafts through a differential mechanism by means of planetary speed reduction, and finally the power is transmitted to wheels through a hub reduction gear, so motor distributed driving and power transmission coupling can be achieved. Through a modular double-motor combination mode and different double-motor coupling control strategies, compared with single-motor driving, the motor load rate is increased, motor operation efficiency is improved, the power assembly is reduced, and development cost is reduced.

Description

technical field [0001] The present application relates to the technical field of new energy vehicles, in particular to a double-motor electric drive axle with a pulley side reducer. Background technique [0002] 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, which causes the actual load rate of the motor to be 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. T...

AI Technical Summary

Problems solved by technology

[0002] 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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