Vehicle drive device

By employing a reduction mechanism with multiple gear combinations in the vehicle drive unit, the problem of large size was solved, achieving miniaturization and efficient transmission, and reducing manufacturing costs.

CN122249981APending Publication Date: 2026-06-19AISIN CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
AISIN CORP
Filing Date
2024-09-30
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing vehicle drive systems tend to be large while ensuring a large reduction ratio, making it difficult to miniaturize them.

Method used

The reduction mechanism employs a combination of multiple gears, including a first gear, a first intermediate gear mechanism, a second intermediate gear mechanism, and a differential input gear. By configuring gear meshing on different shafts, the rotational speed reduction of the rotor is achieved and transmitted to the differential gear mechanism, thus avoiding the problem of excessive radial dimensions caused by a single intermediate gear mechanism.

Benefits of technology

While ensuring a sufficient reduction ratio, the miniaturization of the vehicle drive unit was achieved, and transmission efficiency was improved while manufacturing costs were reduced.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122249981A_ABST
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Abstract

A vehicle drive unit is provided. The vehicle drive unit (100) includes a rotary motor (1), a pair of output members (3), a reduction mechanism (4), and a differential gear mechanism (5). The reduction mechanism (4) reduces the rotation of the rotary motor (1). The differential gear mechanism (5) distributes the rotation transmitted from the reduction mechanism (4) to the pair of output members (3). The reduction mechanism (4) includes a first gear (4A), a first intermediate gear mechanism (41), a second intermediate gear mechanism (42), and a sixth gear (4F) that rotate due to the rotary motor (1). The first intermediate gear mechanism (41) is connected to the first gear (4A). The second intermediate gear mechanism (42) is connected to the first intermediate gear mechanism (41). The sixth gear (4F) drives the second intermediate gear mechanism (42) to the differential gear mechanism (5).
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