Sliding member

Patent metadata

Field	Value
Publication number	US-9759258-B2
Application number	US-201314758167-A
Country	US
Kind code	B2
Filing date	Dec 24, 2013
Priority date	Dec 27, 2012
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

A sliding member includes: a lining layer formed from an alloy having a predetermined shape; and an overlay layer formed on an inner circumferential surface of the lining layer, the overlay layer being formed of a resin, the overlay layer sliding with a shaft, the overlay layer including a raised portion a height of which in a predetermined area including each of an edge in an axial direction of the shaft is greater than a height of another area of the overlay layer.

First claim

What is claimed is:

1. A sliding member comprising:
a lining layer formed from an alloy having a predetermined shape; and
an overlay layer formed on an inner circumferential surface of the lining layer, the overlay layer being formed of resin, the overlay layer being configured to slide along a shaft, the overlay layer including a raised portion in a predetermined area at each axial edge of the overlay layer, a height of the raised portion being greater than a height of an entire remainder of the overlay layer,
in a cross section parallel to an axial direction, the height of the overlay layer gradually decreases from a top of the raised portion to the axial edge.

2. The sliding member according to claim 1 , wherein
the raised portion includes the top between a starting point and the axial edge of the overlay layer, the starting point being an inboard edge of the raised portion,
the sliding member has a width K in the axial direction, and
a distance between the starting point and the axial edge of the overlay layer is less than K/2.

3. The sliding member according to claim 2 , wherein
a difference between a first thickness and a second thickness is less than or equal to 6 micrometers, the first thickness being a thickness of the overlay layer at the entire remainder of the overlay layer, the second thickness being a thickness of the overlay layer at the top.

4. The sliding member according to claim 1 , wherein
the overlay layer consists of at least one of a solid lubricant and hard particles in addition to a binder resin.

5. The sliding member according to claim 4 , wherein
the binder resin consists of at least one of a polyamide-imide (PAI) resin, polyimide resin, phenolic resin, polyacetal resin, poly-ether-ether-ketone resin, and polyphenylenesulfide resin.

6. The sliding member according to claim 5 , wherein
the solid lubricant consists of at least one of MoS 2 , PTFE, graphite, WS 2 , and SB 2 O 3 .

7. The sliding member according to claim 6 , wherein
the hard particles consist of at least one of SiC, Al 2 O 3 , AlN, CrO 2 , Si 3 N 4 , ZrO 2 , and Fe 3 P.

8. The sliding member according to claim 5 , wherein
the hard particles consist of at least one of SiC, Al 2 O 3 , AlN, CrO 2 , Si 3 N 4 , ZrO 2 , and Fe 3 P.

9. The sliding member according to claim 4 , wherein
the solid lubricant consists of at least one of MoS 2 , PTFE, graphite, WS 2 , and SB 2 O 3 .

10. The sliding member according to claim 9 , wherein
the hard particles consist of at least one of SiC, Al 2 O 3 , AlN, CrO 2 , Si 3 N 4 , ZrO 2 , and Fe 3 P.

11. The sliding member according to claim 4 , wherein
the hard particles consist of at least one of SiC, Al 2 O 3 , AlN, CrO 2 , Si 3 N 4 , ZrO 2 , and Fe 3 P.

12. The sliding member according to claim 1 , wherein
the lining layer includes an axially extending surface on which the overlay layer is formed, the axially extending surface being substantially planar in cross section.

13. A sliding member comprising:
a lining layer formed from an alloy having a predetermined shape; and
an overlay layer formed on an inner circumferential surface of the lining layer, the overlay layer being formed of resin, the overlay layer being configured to slide along a shaft,
the overlay layer including:
a first radially projecting rib extending in a circumferential direction along a first axial edge of the overlay layer,
a second radially projecting rib extending in the circumferential direction along a second axial edge of the overlay layer, and
an uninterrupted surface occupying an entire area between a base of the first rib and a base of the second rib,

the uninterrupted surface being:
recessed relative to the first and second ribs, and
substantially planar in cross section,

in a cross section parallel to an axial direction, the height of the overlay layer gradually decreases from a top of the first and second radially projecting ribs to the first and second axial edges, respectively.

14. The sliding member according to claim 13 , wherein
the sliding member has a width K in the axial direction, and
a distance between an inboard starting point of each of the first and second ribs and each of the first and second axial edges, respectively, is less than K/2.

15. The sliding member according to claim 14 , wherein
the overlay layer has a first thickness from the lining layer to the uninterrupted surface,
the overlay layer has a second thickness from the lining layer to a vertex, and
a difference between the first thickness and the second thickness is less than or equal to 6 micrometers.

16. The sliding member according to claim 13 , wherein
the overlay layer consists of at least one of a solid lubricant and hard particles in addition to a binder resin.

17. The sliding member according to claim 16 , wherein
the binder resin consists of at least one of a polyamide-imide (PAI) resin, polyimide resin, phenolic resin, polyacetal resin, poly-ether-ether-ketone resin, and polyphenylenesulfide resin.

18. The sliding member according to claim 16 , wherein
the solid lubricant consists of at least one of MoS 2 , PTFE, graphite, WS 2 , and SB 2 O 3 .

19. The sliding member according to claim 16 , wherein
the hard particles consist of at least one of SiC, Al 2 O 3 , AlN, CrO 2 , Si 3 N 4 , ZrO 2 , and Fe 3 P.

20. The sliding member according to claim 13 , wherein
the lining layer includes an axially extending surface on which the overlay layer is formed, the axially extending surface being substantially planar in cross section.

Assignees

• Taiho Kogyo Co Ltd

Inventors

• Kamiya Shu
• Chitose Toshiyuki
• Tomikawa Takashi
• Kabeya Yasunori
• Yoshimi Taichi

Classifications

• F16C2208/02

  comprising fillers, fibres · CPC title

• B32B2307/746

  Slipping, anti-blocking, low friction · CPC title

• C09D179/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C09D159/00

  Coating compositions based on polyacetals; Coating compositions based on derivatives of polyacetals · CPC title

• B32B15/00

  Layered products comprising {a layer of} metal · CPC title