Ball bearing and method for assembling ball bearing

JP2022173121A5Active Publication Date: 2025-03-28MINEBEAMITSUMI INC
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Patent Information

Application Number
JP2022075672
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-04-20
Filing Date
2022-05-02
Publication Date
2025-03-28
Estimated Expiration
2042-05-02

AI Technical Summary

Technical Problem

Existing ball bearings with snap cages or crown cages suffer from reduced dynamic stability and increased wear at high rotational speeds due to inadequate structural mechanical stability and guide mechanisms, particularly when the cages are closed on both sides in the axial direction.

Method used

A ball bearing with a cage assembled from two parts joined by material bonding, such as ultrasonic welding or gluing, where one part is a snap cage part with axial webs and the other part provides stabilization, ensuring form-fitting retention and guided assembly to enhance stability and reduce wear.

Benefits of technology

The solution provides enhanced wear resistance and stability at high speeds, minimizing cage deformation and wear, while maintaining effective ball guidance and reducing operational friction.

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Abstract

To provide a ball bearing comprises: a holder; and a plurality of balls held in the holder, where the balls are arranged one behind another and at a distance from one another in a circumferential direction about an axis of rotation of the ball bearing.SOLUTION: The holder is assembled from at least two or exactly two holder parts which are joined to one another in a materially bonded manner by welding and / or bonding and completely enclose the balls in a circumferential surface extending around the axis of rotation. In the ball bearing of the present invention, a first holder part is formed as a snap holder having axial webs which project in the direction of the axis of rotation from a closed base ring, where ball pockets are formed between the axial webs; the first holder part encloses the balls along outer circumference of the balls by 180° or more, holds the balls in a shape-bonded manner while forming an undercut, and limits displacement of the balls within the circumferential surface in the direction of the at least one other second holder part.SELECTED DRAWING: Figure 1
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