Unit

WO2025187135A8 Publication Date: 2025-10-02JATCO LTD
0 Cites 0 Cited by

Patent Information

Application Number
PCT/JP2024/041371
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-05
Filing Date
2024-11-22
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

Vibrations generated by the planetary gear mechanism in electric vehicle drive units are transmitted to the vehicle body, significantly impacting vehicle vibrations due to a short transmission distance between the ring gear and the case.

Method used

The connection portion between the ring gear and the case is positioned such that it is not located between the center of rotation of the planetary gear mechanism and the boundary between the mounting member and the case, incorporating a toothless portion or a fastening structure that avoids direct alignment, thereby increasing the vibration transmission distance.

Benefits of technology

This configuration reduces the impact of the planetary gear mechanism on vehicle vibrations by elongating the vibration transmission path, while maintaining support performance for the pinion gears during revolution.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

[Problem] To reduce the influence of a planetary gear mechanism on vehicle vibration. [Solution] A unit comprising: a case; a planetary gear mechanism accommodated in the case; a mount member that is provided on an outer wall of the case and connects the case and a vehicle body; and a connection part that connects a ring gear of the planetary gear mechanism and an inner wall of the case, wherein, when viewed from a rotation axis direction, the connection part is not disposed between a rotation center of the planetary gear mechanism and the entire area of a boundary part between the mount member and the case.
Need to check novelty before this filing date? Find Prior Art