# US 12,006,980 B2 · Rolling bearing having improved sealability

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,006,980 B2
- Document ID: US12006980B2
- Status: Granted
- Kind: B2
- Application number: 17/492,948
- Filed: 2021-10-04
- Published: 2022-01-27
- Granted: 2024-06-11
- Earliest claimed: 2019-04-03
- Assignees: Bearingart
- Applicants: Bearingart
- Inventors: Young Keun Lee; Kyu Bok Kim
- Web page: https://patentgrep.com/patent/US12006980B2

## CPC

- F16C 33/7846: {with a gap between the annular disc and the inner race}
- F16C 33/7823: {of sealing lips}
- F16C 33/7826: {of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring}
- F16C 33/7853: {with one or more sealing lips to contact the inner race}
- F16C 33/80: Labyrinth sealings {(F16C33/761 takes precedence)}
- F16C 33/805: {in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips}
- F16C 43/045: {Mounting or replacing seals}
- F16J 15/3232: having two or more lips
- F16J 15/447: Labyrinth packings
- F16C 19/06: with a single row or balls
- F16C 33/6603: {with grease as lubricant}
- F16C 33/783: {of the mounting region}
- F16C 2240/30: Angles, e.g. inclinations
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS

## Abstract

A sealing member of a rolling bearing is formed in a structure in which an elastic sealing portion is attached to a frame, and the elastic sealing portion may comprise a first sealing portion formed on one end portion of the frame and a second sealing portion formed on the other end portion of the frame. The first sealing portion may be inserted into and mounted to a coupling groove formed in the second member, and the second sealing portion may comprise an axial sealing lip extending in the axial direction from the frame and a radial sealing lip extending in the radial direction from the frame. The axial sealing lip and the radial sealing lip of the second sealing portion may be positioned adjacent to the first member and may be configured to perform a sealing in a non-contact manner.

## Claims

### Claim 1

A rolling bearing, comprising:
a first member having a raceway for rolling elements formed on one side of the first member;
a second member provided to be spaced apart from the first member in a radial direction and having a raceway for the rolling elements formed on one side of the second member;
the rolling elements provided between the first member and the second member; and
a sealing member provided in an axial end portion of the rolling bearing between the first member and the second member,
wherein the sealing member is formed in a structure in which an elastic sealing portion is attached to a frame,
the elastic sealing portion comprises a first sealing portion formed on one end portion of the frame and a second sealing portion formed on the other end portion of the frame,
the first sealing portion is inserted into and mounted to a coupling groove formed in the second member,
the second sealing portion comprises an axial sealing lip extending in an axial direction from the frame and a radial sealing lip extending in the radial direction from the frame,
the axial sealing lip and the radial sealing lip of the second sealing portion are positioned adjacent to the first member and are configured to perform a sealing in a non-contact manner,
the radial sealing lip of the second sealing portion is formed in a shape corresponding to a sealing groove formed in the first member and is accommodated in the groove, and
a groove is formed at an axial outer side of the radial sealing lip to have a shape recessed obliquely and inwardly with respect to the axial direction,
wherein the groove formed in the second sealing portion comprises two linear surfaces, and a rounded portion formed at end portions of the two linear surfaces, and
wherein a radius of the rounded portion constituting the groove of the second sealing portion falls within a range of 15% to 20% of an axial maximum thickness t between an axial inner surface of the radial sealing lip and an axial outer surface of the second sealing portion.

### Claim 2 (depends on 1)

The rolling bearing of claim 1, wherein the groove formed in the second sealing portion is formed to be recessed obliquely and inwardly at an angle of 50 to 70 degrees with respect to the axial direction.

### Claim 3 (depends on 1)

The rolling bearing of claim 1, wherein the two linear surfaces constituting the groove of the second sealing portion are formed in a parallel relationship with each other, or such that a width between the two linear surfaces is increased outward in the axial direction.

### Claim 4 (depends on 3)

The rolling bearing of claim 3, wherein an angle between the two linear surfaces constituting the groove of the second sealing portion falls within a range of 0 to 40 degrees.

### Claim 5 (depends on 4)

The rolling bearing of claim 4, wherein the rounded portion constituting the groove of the second sealing portion is formed in an arc shape in contact with the two linear surfaces.

### Claim 6 (depends on 1)

The rolling bearing of claim 1, wherein the second sealing portion further comprises an extended portion formed at an axial outer side of the groove and configured to perform the sealing in conjunction with a stepped portion formed in the axial end portion of the first member.

### Claim 7 (depends on 6)

The rolling bearing of claim 6, wherein the extended portion is positioned adjacent a stepped portion of the first member and is configured to perform the sealing in the non-contact manner.

### Claim 8 (depends on 6)

The rolling bearing of claim 6, wherein the extended portion is positioned in contact with the stepped portion of the first member and is configured to perform the sealing in a contact manner.

### Claim 9 (depends on 1)

The rolling bearing of claim 1, further comprising: an outer recess formed at an axial outer surface of the second sealing portion to be recessed inward of the second sealing portion.