Coaxial multi-gear electric drive axle system and vehicle

By designing a coaxial multi-speed electric drive axle system in the electric drive axle system, using a parallel shaft transmission mechanism and a planetary assembly, combined with two shifting mechanisms, the transmission of three gears is achieved, solving the problems of complex structure, high manufacturing cost and limited speed ratio coverage in the existing technology, and an efficient and compact electric drive axle system is realized.

CN119682534AActive Publication Date: 2025-03-25ZERON AUTOMOBILE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411887690.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-03-25
Estimated Expiration
2044-12-20

AI Technical Summary

Technical Problem

The existing electric drive axle system has the problems of high manufacturing difficulty, high manufacturing cost, only two gear transmissions can be achieved, complex structures and unfavorable for compact layout, and it is difficult to meet the diverse transmission ratio requirements under different working conditions.

Method used

The coaxial multi-speed electric drive axle system is adopted. By setting a parallel shaft transmission mechanism and planetary assembly in the main box and the sub-box, and designing two shifting mechanisms, the transmission of three forward gears is achieved.

Benefits of technology

The switching of three gears is achieved, the speed ratio coverage of the system is expanded, the structure is compact, the transmission efficiency is high, and the manufacturing and maintenance costs are reduced. It is suitable for different types of new energy vehicles.

✦ Generated by Eureka AI based on patent content.
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Abstract

According to the coaxial type multi-gear electric drive axle system and the vehicle, by arranging two gear shifting mechanisms, switching of three gears can be achieved, so that the driving requirements under different working conditions are met. Wherein the first gear is used for a low-speed large-torque working condition, the second gear is used for a medium-speed working condition, the third gear is used for a high-speed working condition, and the speed ratio coverage range of the system is effectively expanded. Furthermore, the gear transmission mechanism and the planet row assembly are coaxially arranged, the structure is compact, the transmission efficiency is high, the meshing relation between gear sleeves and combination teeth of the two gear shifting mechanisms is reasonably designed, smooth switching among three gears is achieved, gear shifting impact is avoided, and the driving comfort of the whole vehicle is improved.
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