Mechanical drive device for a transmission shaft comprising two rotating machines

FR3154045B1Active Publication Date: 2026-02-13VALEO EAUTOMOTIVE GERMANY GMBH
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Patent Information

Application Number
FR2023011205
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-10-17
Publication Date
2026-02-13
Estimated Expiration
2043-10-17

AI Technical Summary

Technical Problem

Existing wheel drive systems in electric vehicles face challenges in achieving sufficient mechanical torque while maintaining a compact and reliable architecture, often requiring more powerful rotating machines or additional gears, which can compromise efficiency and reliability.

Method used

A mechanical drive device utilizing two identical or different rotating machines, each connected to a differential through an epicyclic gear train, where the moving parts of the machines transmit torques that sum up to provide higher mechanical torque, with a compact and reliable design.

Benefits of technology

The drive device enhances torque output and reliability by allowing each machine to operate at its efficiency peak, ensuring continued operation even with a failed machine, and improves compactness by integrating the differential within the epicyclic gear train.

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Abstract

The present invention relates to a drive device (2) comprising: a frame (4); a first machine (6) comprising a fixed part (8) and a rotating moving part (10); a second machine (12) comprising a fixed part (14) and a rotating moving part (16) configured to transmit a second torque; an epicyclic gear train (18) comprising a ring gear (20), a planet gear (22), and a planet carrier (24) rotating relative to the ring gear (20), the rotating part (10) of the first machine being fixed to the planet carrier (24); a drive shaft (26); a differential (28) configured to transmit a resulting torque to the drive shaft (26); the drive device (2) being characterized in that the moving part (16) of the second machine (12) transmits the second torque to the differential (28). Abstract figure: Figure 1
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