Title:
RESIN-MADE CAGE FOR BALL BEARING AND BALL BEARING
Document Type and Number:
WIPO Patent Application WO/2022/054730
Kind Code:
A1
Abstract:
A resin-made cage (20) for a ball bearing is obtained by combining a first cage element (30) with a second cage element (50) in the axial direction. The first cage element (30) has pocket portions (31), first connecting portions (32), and engaged portions (41). The second cage element (50) has pocket opposing portions (51), second connecting portions (52), and engaging portions (53). The pocket portions (31) are each provided with a pair of protruding portions (33) opposed to each other in the circumferential direction and forming a pocket surface (35), and a ball (13) is held only by the pocket surface (35) of the first cage element (30). The pocket opposing portions (51) are each provided with a partially cylindrical surface (51a) having a radius (r1) larger than the total sum of a radius (R) of the ball (13) and an axial movement amount (∆a) of the first cage element (30) and the second cage element (50). Accordingly, the present invention provides a resin-made cage for a ball bearing and a ball bearing which suppress the occurrence of stress that would separate the engagement between the first cage element and the second cage element engaging each other, which can downsize the engaging portions, and which have a high degree of freedom in cage design.
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Inventors:
TORII KEISUKE (JP)
Application Number:
PCT/JP2021/032553
Publication Date:
March 17, 2022
Filing Date:
September 03, 2021
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C19/06; F16C33/38
Foreign References:
| JPS60227014A | 1985-11-12 | |||
| JP2007198583A | 2007-08-09 | |||
| JP2015187494A | 2015-10-29 | |||
| JP2007285506A | 2007-11-01 | |||
| JP2020153066A | 2020-09-24 |
Other References:
See also references of EP 4212747A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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