# US 12,215,742 B2 · Sliding member

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- Number: US 12,215,742 B2
- Document ID: US12215742B2
- Status: Granted
- Kind: B2
- Application number: 17/774,069
- Filed: 2020-11-27
- Published: 2022-12-01
- Granted: 2025-02-04
- Earliest claimed: 2019-12-03
- Assignees: Daido Metal Company Ltd.
- Applicants: Daido Metal Company Ltd.
- Inventors: Tetsuya Ogawa; Erina Yasuda; Kenji Nimura
- Web page: https://patentgrep.com/patent/US12215742B2

## CPC

- F16C 33/201: {Composition of the plastic}
- F16C 33/6696: {with solids as lubricant, e.g. dry coatings, powder}
- F16C 2240/30: Angles, e.g. inclinations
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A sliding member includes a resin overlay layer on a sliding-surface side of a bearing alloy layer. The resin layer includes a resin binder and 20% by volume or more of solid lubricant particles with an anisotropic shape dispersed in the resin binder. The sliding surface is located at 0° and has a virtual axis perpendicular to the sliding surface at 90°. An angle θ is formed by a straight line and a major axis of the particles. The total number of the particles in a observation region is N. A rate R1=N1/N of the number N1 of first particles at the angle θ of 70°≤θ≤90° from among the particles is 3%≤R1≤20%, and a rate R2=N2/N of the number N2 of second particles with the angle θ being θ≤20° is 35%≤R2≤65%.

## Claims

### Claim 1

A sliding member comprising:
a resin overlay layer on a sliding-surface side of a bearing alloy layer,
wherein the resin overlay layer includes
a resin binder, and
20% by volume or more of solid lubricant particles with an anisotropic shape dispersed in the resin binder,
when a virtual straight line that is parallel to the sliding surface is defined as being located at 0°, a virtual axis that is perpendicular to the sliding surface is defined as being located at 90°, an angle formed by the straight line and the major axis of the particles is defined as θ, and the total number of the particles included in a given observation region of the resin binder is defined as N,
a rate R1=N1/N of the number N1 of first particles with the angle θ being 70°≤θ≤90° from among the particles is 3%≤R1≤20%, and
a rate R2=N2/N of the number N2 of second particles with the angle θ being θ≤20° from among the particles is 35%≤R2≤65%.

### Claim 2 (depends on 1)

The sliding member according to claim 1,
wherein the rate R1 is 6%≤R1≤15%, and
the rate R2 is 40%≤R2≤60%.

### Claim 3 (depends on 1)

The sliding member according to claim 1, wherein a rate R3=N3/N of the number N3 of third particles with the angle θ being 40°≤θ≤50° from among the particles is 5%≤R3≤15%.

### Claim 4 (depends on 1)

The sliding member according to claim 1, wherein a vertical component rate Rx of the particles is 0.20≤Rx≤0.50.

### Claim 5 (depends on 4)

The sliding member according to claim 4, wherein the vertical component rate Rx is 0.25≤Rx≤0.40.

### Claim 6 (depends on 1)

The sliding member according to claim 1,
wherein when a distribution parameter a is 10≤a≤160,
a range of 0° to 90° from the straight line to the axis is sectioned in units of 10° into angular ranges of A−10°<x≤A° (A=10, 20, 30, . . . 90), which of the angular ranges the angle of the major axis of the particles is included is classified, and the number n of the particles included in each of the angular ranges is counted,
a distribution rate n/N (%) of the particles included in the resin binder is represented:
n
N
[
%
]
=
100
×
e
-
(
x
a
)
×
e
-
(
10
a
)
-
1
e
-
(
10
a
)
×
(
e
-
(
90
a
)
-
1
)