Lightweight dual-motor dual-speed-reducer electric drive axle assembly

Abstract

The invention provides a lightweight dual-motor dual-speed-reducer electric drive axle assembly. Two drive motors both adopt high-speed motors, the torque is reduced on the premise of the same power,and the weight and cost of the motors are lowered; in order to meet the requirement of the maximum gradeability of the whole automobile, the two small-torque high-rotating-speed motors are matched with large-speed-ratio speed reducers respectively, and enough drive force is supplied to the whole automobile; according to the condition of the whole automobile, the power, torque, efficiency distribution and other parameters of the two motors are reasonably selected, the speed ratios of the speed reducers connected with the motors are reasonably matched, and the optimum drive mode is supplied to the whole automobile; the two drive motors and the speed reducers can select the same parameters to reduce the production cost, different parameters can be selected to avoid resonance points of the twosystems, and the NVH characteristics of the assembly are ensured; the left-right wheel independent drive electronic differential technology is adopted, a traditional bevel gear type differential assembly is omitted, the weight of the assembly can be effectively lowered, meanwhile, the drive force of wheels can be effectively ensured, and the whole automobile driving stability and security are improved.

Description

technical field [0001] The invention belongs to the technical field of an electric drive axle assembly, and in particular relates to a lightweight electric drive axle assembly with double motors and double reducers. Background technique [0002] At present, there are two main structural forms of dual-motor double-reducer electric drive axles, one is wheel-side electric drive axles, and the other is central integrated electric drive axles. The motor and reducer of the wheel-side electric drive axle are distributed at both ends of the bridge, and the left and right wheels are used to independently drive the electronic differential technology. However, due to the small ground clearance, it is mainly used in new energy buses; the motor and reducer of the central integrated electric drive axle The gears are distributed on the front and rear sides of the center of the axle housing. The two reducers share the traditional bevel gear differential assembly. The power of the two motors...

AI Technical Summary

Problems solved by technology

The motor and reducer of the wheel-side electric drive axle are distributed at both ends of the bridge, and the left and right wheels are used to independently drive the electronic differential technology. However, due to the small ground clearance, it is mainly used in new energy buses; the motor and reducer of the central integrated electric drive axle The gears are distributed on the front and rear sides of the center of the axle housing. The two reducers share the traditional bevel gear differential assembly. The power of the two motors is transmitted to the differential through the reducer, and then through the differential and the left and right half shafts is transmitted to the wheels, so this kind of electric drive axle assembly is heavy and costly

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