Sliding mechanism

Patent metadata

Field	Value
Publication number	US-2016348545-A1
Application number	US-201515117297-A
Country	US
Kind code	A1
Filing date	Jan 16, 2015
Priority date	Feb 10, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A sliding mechanism 1 includes a first sliding member 10 and a partner second sliding member 20 configured to slide relative to the first sliding member 10 . The first sliding member 10 includes a matrix phase 11 and a hard phase 13 that is harder than the matrix phase 11 , in which the hard phase 13 is embedded in the matrix phase 11 in a dispersed state. The second sliding member 20 includes a base 21 and a surface-treatment layer 23 that is formed on the sliding surface 20 of the base 21 and is harder than the matrix phase 11.

First claim

1 .- 8 . (canceled)

9 . A sliding mechanism, comprising:
a first sliding member and a partner second sliding member configured to slide relative to the first sliding member,
wherein the first sliding member consists of a matrix phase and a hard phase that is harder than the matrix phase, in which the hard phase is embedded in the matrix phase in a dispersed state,
the matrix phase is composed of copper or a copper alloy (which is neither a brass-based alloy nor a bronze-based alloy), the hard phase is composed of an iron alloy, and the second sliding member is harder than the matrix phase.

10 . The sliding mechanism according to claim 9 , wherein the first sliding member comprises the hard phase that is exposed in a sliding surface of the first sliding member.

11 . The sliding mechanism according to claim 9 , wherein the second sliding member or a surface-treatment layer formed on a sliding surface of the second sliding member is harder than the first sliding member.

12 . The sliding mechanism according to claim 11 , wherein the surface-treatment layer is composed of at least one layer selected from the group consisting of a nitride layer, a carburized layer, a chromium plating layer and a diamond-like carbon coating layer.

13 . The sliding mechanism according to claim 9 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

14 . The sliding mechanism according to claim 9 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

15 . The sliding mechanism according to claim 10 , wherein the second sliding member or a surface-treatment layer formed on a sliding surface of the second sliding member is harder than the first sliding member.

16 . The sliding mechanism according to claim 15 , wherein the surface-treatment layer is composed of at least one layer selected from the group consisting of a nitride layer, a carburized layer, a chromium plating layer and a diamond-like carbon coating layer.

17 . The sliding mechanism according to claim 10 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

18 . The sliding mechanism according to claim 11 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

19 . The sliding mechanism according to claim 12 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

20 . The sliding mechanism according to claim 14 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

21 . The sliding mechanism according to claim 15 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

22 . The sliding mechanism according to claim 16 , further comprising:
a cooling unit disposed around the first sliding member, configured to directly or indirectly cool the first sliding member,
wherein the cooling unit has at least one cooling function selected from the group consisting of water cooling, oil cooling and air cooling, and
the first sliding member is partly exposed to a high-temperature atmosphere during use.

23 . The sliding mechanism according to claim 10 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

24 . The sliding mechanism according to claim 11 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

25 . The sliding mechanism according to claim 12 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

26 . The sliding mechanism according to claim 13 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

27 . The sliding mechanism according to claim 15 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

28 . The sliding mechanism according to claim 16 , wherein the first sliding member is used for at least one of a valve guide and a valve sheet of an internal combustion engine.

Assignees

• Nissan Motor

Inventors

• Izawa Yoshinori
• Mabuchi Yutaka

Classifications

• F16C2204/12

  with tin as the next major constituent · CPC title

• F16C2204/14

  with zinc as the next major constituent · CPC title

• C23C8/24

  Nitriding · CPC title

• F16C2223/14

  with nitriding · CPC title

• F16C2240/00

  Specified values or numerical ranges of parameters; Relations between them · CPC title