Rolling bearing, rotating device, and method for manufacturing rolling bearing

Patent metadata

Field	Value
Publication number	US-12454983-B2
Application number	US-202418405614-A
Country	US
Kind code	B2
Filing date	Jan 5, 2024
Priority date	Jan 12, 2023
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

The rolling bearing includes an inner ring and an outer ring that are disposed coaxially with each other, a rolling body that is disposed between the inner ring and the outer ring, and a resin cover that is mounted on the outer ring. The outer ring has an outer circumferential surface that faces an opposite side of the inner ring, and an end surface that faces an axial direction. The resin cover has a circumferential wall portion that covers the outer circumferential surface, and a flange portion that is connected to the circumferential wall portion and covers the end surface. The flange portion has an opening portion formation region that has a constant width in a radial direction, extends over an entire circumference, and is formed with opening portions that expose the end surface.

First claim

What is claimed is:

1. A rolling bearing comprising:
an inner ring and an outer ring that are disposed coaxially with each other;
a rolling body that is disposed between the inner ring and the outer ring; and
a resin cover that is mounted on one bearing ring of the inner ring and the outer ring, wherein the one bearing ring comprises:
a circumferential surface that faces an opposite side of the other bearing ring of the inner ring and the outer ring; and
an end surface that faces an axial direction,

the resin cover comprises:
a circumferential wall portion that covers the circumferential surface; and
a flange portion that is connected to the circumferential wall portion and covers the end surface, wherein the flange portion has an opening portion formation region that has a constant width in a radial direction, extends over an entire circumference, and is formed with opening portions that expose the end surface.

2. The rolling bearing according to claim 1 , wherein the flange portion further includes a covering region that is formed adjacent radially outside to the opening portion formation region, extends over an entire circumference, and entirely covers the end surface.

3. The rolling bearing according to claim 2 , wherein the covering region is formed adjacent radially outside to the opening portion formation region on an opposite side of the circumferential wall portion in the radial direction.

4. The rolling bearing according to claim 1 , wherein a total area of the opening portions is smaller than a half in area of the opening portion formation region.

5. The rolling bearing according to claim 1 , wherein the opening portion is opened at a circumferential edge in the flange portion on an opposite side of the circumferential wall portion.

6. The rolling bearing according to claim 1 , wherein the flange portion has a gap over an entire circumference with respect to a circumferential edge of the end surface on an opposite side of the circumferential surface when viewed in the axial direction.

7. The rolling bearing according to claim 1 , wherein the opening portions are arranged at equal intervals in a circumferential direction.

8. The rolling bearing according to claim 1 , wherein the flange portion includes:
a first flange portion covering a first end surface of the one bearing ring; and
a second flange portion covering a second end surface of the one bearing ring, wherein the first flange portion and the second flange portion are formed in the same shape as each other when viewed in the axial direction.

9. The rolling bearing according to claim 1 , wherein the one bearing ring is mounted on a mounted member, and the opening portions are fitted into the mounted member in a relatively unrotatable manner.

10. A rotating device comprising:
a rotating body disposed to be rotatable;
a support body configured to rotatably support the rotating body; and
the rolling bearing according to claim 1 interposed between the rotating body and the support body.

11. A method for manufacturing a rolling bearing in which a resin cover to be mounted on a bearing ring of the rolling bearing and configured to cover a circumferential surface and an end surface of the bearing ring is insert-molded integrally with the bearing ring, the method for manufacturing a rolling bearing comprising embedding the bearing ring in the resin cover using a mold, wherein the mold comprises:
a core that holds the bearing ring alone; and
an ejector sleeve having a plurality of pin portions abutted against the end surface in a circumferential direction.

Assignees

• Seiko Instr Inc

Inventors

• Iino Akihiro
• Kosaka Takayuki
• Hasegawa Haruhiko

Classifications

• F16C2208/02

  comprising fillers, fibres · CPC title

• F16C2208/52

  Polyphenylene sulphide [PPS] (F16C2208/58 takes precedence) · CPC title

• F16C2208/70

  Polyesters, e.g. polyethylene-terephthlate [PET], polybutylene-terephthlate [PBT] · CPC title

• F16C33/586

  outside the space between the races, e.g. end faces or bore of inner ring · CPC title

• F16C19/06

  with a single row or balls · CPC title