Static sealing system in sealing shield for rolling bearing and rolling bearing

By employing a double-ring boss design and a thinned ring support structure in the static sealing system of rolling bearings, the problems of decreased sealing performance and increased friction caused by machining tolerances of the outer ring are solved, achieving more efficient sealing and reduced friction.

CN122148661APending Publication Date: 2026-06-05AB SKF SKF PATENT DEPARTMENT
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Patent Information

Application Number
CN202511727487.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-12-03
Filing Date
2025-11-24
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the prior art, the static sealing system of rolling bearings suffers from decreased sealing performance and increased friction due to machining tolerances of the outer ring, resulting in uneven sealing pressure distribution and unexpected reaction forces generated during assembly, which affect the sealing effect.

Method used

The design employs a double-ring boss. The first ring boss is interference-fitted with the outer ring seat, while the second ring boss is spaced apart from the curved end surface in the axial direction. Combined with the thinning design of the ring support, this ensures proper installation of the sealing device, reduces deformation, and lowers friction.

Benefits of technology

Improve sealing performance, ensure proper installation of sealing devices, reduce friction, minimize the risk of unintended contact and deformation, enhance hydraulic sealing performance, and protect against the effects of outer ring machining tolerances.

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Abstract

Static sealing system (1) and associated rolling bearing (3), in particular for a wheel hub unit of a vehicle, for coupling a sealing device (2) to an outer ring (5) of the bearing, the mounting portion (15) of the sealing device comprising a sleeve portion (12) of an annular support (10) and an end portion (14) of an elastomeric sealing element (11), the end portion is coupled to the sleeve portion and has a radially inner first annular boss (16) configured to be coupled in an interference fit with an annular seat (18) of the outer ring; the end portion of the elastomeric element comprises a second annular boss (20) adjacent to the first annular boss, coupled with the annular seat on an axially opposite side from a curved end surface (22) of the annular seat, and flanked radially outside by a radially thinned end (24) of the sleeve portion of the annular support, a first annular boss protrudes from the end portion in the axial direction.
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