Torque directional distribution and double motor multi-mode coupling drive integrated toothless ring electric drive bridge

By designing an integrated gearless electric drive axle with torque-oriented distribution and dual-motor multi-mode coupling drive, the problems of high cost and poor stability of drive axle systems in new energy commercial vehicles under complex working conditions have been solved. It has achieved efficient switching and independent control of four drive modes, reduced production costs, and improved the stability and energy efficiency of the whole vehicle.

CN122323682APending Publication Date: 2026-07-03JILIN UNIVERSITY
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Patent Information

Application Number
CN202610583099.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing drive axle systems for new energy commercial vehicles suffer from high costs, poor reliability, and insufficient stability when meeting power demands under complex driving conditions. In particular, dual-motor multi-mode coupling drive axles require multiple shifting mechanisms, leading to increased production costs. Furthermore, distributed drive systems are costly and have limited load-bearing capacity.

Method used

Design a gearless electric drive bridge that integrates torque-oriented distribution and dual-motor multi-mode coupling drive. Employing fewer active actuators, it achieves integrated multi-coupling drive modes and torque-oriented distribution functions. Four drive operating states are realized through a shift fork coupling sleeve mechanism and a one-way clutch, including dual-motor torque coupling drive, dual-motor speed coupling drive, single-motor independent drive, and torque-oriented distribution drive.

Benefits of technology

It effectively reduces manufacturing costs, improves vehicle handling stability and drive system reliability, increases energy efficiency, reduces transmission efficiency loss, and enables independent control of the driving force of the left and right wheels.

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Abstract

This invention discloses an integrated gearless ring drive axle with torque-oriented distribution and dual-motor multi-mode coupling drive, comprising a first motor, a second motor, a first reducer, a second reducer, an intermediate shaft, a first compound planetary gear set, a second compound planetary gear set, a one-way clutch, a differential, a main reducer, a secondary reducer, and a shift fork engagement mechanism. The first left sun gear is connected to the first reducer, the first right sun gear is connected to the intermediate shaft, the second left sun gear is connected to the first planetary carrier, the second right sun gear is connected to the intermediate shaft, the second planetary carrier is connected to the one-way clutch, and the intermediate shaft is connected to the second reducer. The main reducer connects the first planetary carrier to the differential. The intermediate shaft, via the secondary reducer and the shift fork engagement mechanism, is connected to the right half-shaft, the drive axle housing, or remains in a free state. Ultimately, four drive modes can be achieved: dual-motor torque coupling drive, dual-motor speed coupling drive, single-motor independent drive, and torque-oriented distribution drive.
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