Novel roller needle bearing with sealing structure

By designing a combination structure of sealing ring and fastening ring in needle roller bearings, a double seal is formed, which solves the problem of grease leakage under high-speed rotation or vibration of traditional sealing structures, and achieves high sealing performance and long service life of bearings.

CN224283215UActive Publication Date: 2026-05-26ZHONGZHE HIGH-SPEED RAILWAY BEARING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHONGZHE HIGH-SPEED RAILWAY BEARING CO LTD
Filing Date
2025-08-19
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Traditional needle roller bearings are prone to grease leakage under high-speed rotation or vibration due to their sealing structure. Furthermore, impurities such as dust and moisture can enter through the gaps, affecting the bearing's sealing performance and service life.

Method used

The sealing ring has an "F" shaped cross section, with the top extending obliquely upwards to abut against the outer ring. The sealing ring is axially pressed against the flat retaining ring by the fastening ring, so that the sealing ring is embedded between the flat retaining ring and the inner ring, forming a double seal and achieving radial and axial fixation.

Benefits of technology

It improves the assembly reliability of the sealing ring, prevents grease leakage, extends the service life of the bearing, meets the maintenance-free requirement, and ensures the stability and sealing performance of the bearing.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224283215U_ABST
    Figure CN224283215U_ABST
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Abstract

The utility model relates to the technical field of needle bearings, in particular to a novel roller needle bearing with a sealing structure. Comprising an outer ring, an inner ring arranged in the outer ring and a roller pin arranged between the outer ring and the inner ring, the flat check rings are arranged at the two ends of the roller pin and installed between the outer ring and the inner ring, the sealing ring is arranged between the flat check rings and the outer ring, the fastening ring is arranged between the flat check rings and the inner ring, the section of the sealing ring is in an F shape, the top of the sealing ring obliquely extends upwards and outwards to be connected with the outer ring in an abutting mode, and the top of the sealing ring is connected with the outer ring in an abutting mode. And the fastening ring axially presses the loose rib to enable the sealing ring to be embedded between the loose rib and the inner ring so as to form double sealing. The roller needle bearing of the novel sealing structure has the advantages of being good in sealing performance, long in service life, high in reliability, good in stability and firmness, convenient to maintain and the like.
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