Rolling bearing

By forming a spherical portion on the wall of the retainer pocket of the rolling bearing and a notch on the inner or outer diameter side of the pocket, the problems of interference and uneven grease distribution during high-speed rotation of the rolling bearing are solved, achieving improved high-speed rotation performance and effective grease management.

CN120641673APending Publication Date: 2025-09-12NTN CORP
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Patent Information

Application Number
CN202480010273.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-02-17
Filing Date
2024-02-13
Publication Date
2025-09-12

AI Technical Summary

Technical Problem

Existing rolling bearings are prone to interference between the balls and the retainer when rotating at high speeds, leading to problems such as oil burning, abnormal wear and heat generation. At the same time, uneven distribution of grease will increase the running-in time and heat generation.

Method used

A spherical portion is formed on the wall of the retainer pocket of the rolling bearing so that the spherical portion does not contact the ball when the ball abuts the circumferential end of the pocket. A cutout portion is also formed on the inner or outer diameter side of the pocket to reduce the grease retention area.

Benefits of technology

By preventing direct contact between the balls and the retainer, the amount of grease retained and the amount of heat generated are reduced, the stability during high-speed rotation and the uniformity of grease distribution are improved, and the running-in time and heat generation are reduced.

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Abstract

A rolling bearing according to the present invention is configured to have: a cage (3) in which a plurality of pockets (2) are formed in the circumferential direction by causing two annular bodies (11) to face each other in the axial direction, the two annular bodies (11) being alternately formed in the circumferential direction with a plurality of pocket wall sections (9) provided with recesses constituting the pockets (2), and coupling plate sections (10) connecting the pocket wall sections (9) to each other; an inner ring (5) having an inner ring raceway surface (4) formed on the outer peripheral surface; an outer ring (7) provided on the outer peripheral side of the inner ring (5) and having an outer ring raceway surface (6) formed on the inner peripheral surface; and a plurality of balls (8) provided between the inner ring (5) and the outer ring (7) and held by pockets (2) formed in the cage (3), in which a spherical surface section (17) is formed in a pocket wall section (9), the spherical surface section (17) being not in contact with the balls (8) in a state in which the balls (8) are in contact with circumferential end sections of the pockets (2).
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