Sealing structure and method for manufacturing the same

By using a sealing structure with pre-deformed rubber components in the oil-cooled motor and battery, the problem of decreased sealing performance caused by temperature and hydraulic pressure changes is solved, achieving excellent sealing performance over a long period of time.

CN122447486APending Publication Date: 2026-07-24WUXI NOK FREUDENBERG OILSEAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUXI NOK FREUDENBERG OILSEAL CO LTD
Filing Date
2026-06-17
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In oil-cooled motors and batteries, gaps can appear between the sealing material and the plastic support and metal conductor due to temperature and hydraulic pressure changes in the sealing structure, resulting in decreased sealing performance and leakage of liquid from the sealed object.

Method used

A sealing structure using rubber components to fill gaps through pre-deformation force is used. The rubber components are fixed to the metal conductor by injection molding and maintain a seal through pre-deformation force when the environment changes. The rubber components are made of rubber material and are fixed by chemical bonding or shape locking. The plastic support is formed by injection molding to create an internal space to accommodate the rubber components.

Benefits of technology

Even under changes in temperature and hydraulic pressure, the rubber components can fill gaps through pre-deformation force, maintaining excellent sealing performance and extending the service life of the sealing structure.

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Abstract

The present invention relates to a sealing structure and a manufacturing method thereof, the sealing structure comprising: a metal conductor having a length direction and a circumferential direction; a rubber portion formed on a partial surface of the length direction of the metal conductor and continuously formed over the circumferential direction of the partial surface; and a plastic support for supporting the metal conductor and the rubber portion, the plastic support being formed by injection molding, having the rubber portion accommodated therein, both ends of the length direction of the metal conductor being exposed from the plastic support, and the rubber portion having a pre-deformation force.
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