IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0835705
(2010-07-13)
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등록번호 |
US-8152377
(2012-04-10)
|
우선권정보 |
JP-2002-322322 (2002-11-06); JP-2003-207056 (2003-08-11); JP-2003-208193 (2003-08-21) |
발명자
/ 주소 |
- Konishi, Shozaburo
- Kano, Makoto
- Yasuda, Yoshiteru
- Mabuchi, Yutaka
- Hamada, Takahiro
- Takeshima, Shigeki
- Tsushima, Kenji
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
292 |
초록
▼
A low-friction sliding mechanism includes first and second sliding members having respective sliding surfaces slidable relative to each other and a lubricant applied to the sliding surfaces of the first and second sliding members. At least the sliding surface of the first sliding member is made of a
A low-friction sliding mechanism includes first and second sliding members having respective sliding surfaces slidable relative to each other and a lubricant applied to the sliding surfaces of the first and second sliding members. At least the sliding surface of the first sliding member is made of a diamond-like carbon material, and at least the sliding surface of the second sliding member is made of either an aluminum-based alloy material, a magnesium-based alloy material or a diamond-like carbon material. The lubricant contains a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.
대표청구항
▼
1. A low-friction sliding mechanism, comprising: a first sliding member having a sliding surface, at least the sliding surface of the first sliding member comprising a diamond-like carbon material;a second sliding member having a sliding surface slidable relative to the sliding surface of the first
1. A low-friction sliding mechanism, comprising: a first sliding member having a sliding surface, at least the sliding surface of the first sliding member comprising a diamond-like carbon material;a second sliding member having a sliding surface slidable relative to the sliding surface of the first sliding member, the second sliding member being formed in one piece of diamond-like carbon material; anda lubricant applied to the sliding surfaces of the first and second sliding members, the lubricant comprising at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier. 2. A low-friction sliding mechanism according to claim 1, wherein the diamond-like carbon material of the first sliding member is hydrogen-free amorphous carbon. 3. A low-friction sliding mechanism according to claim 1, wherein the aluminum-based alloy material of the second sliding member is a hypoeutectic or hypereutectic aluminum alloy containing 4 to 20% by mass silicon and 1.0 to 5.0% by mass copper. 4. A low-friction sliding mechanism according to claim 1, wherein the magnesium-based alloy material of the second sliding member comprises at least one alloy selected from the group consisting of magnesium-aluminum- zinc alloys, magnesium-aluminum-rare earth metal alloys, magnesium- aluminum-calcium alloys, magnesium-zinc-aluminum-calcium alloys, magnesium-aluminum-calcium-rare earth metal alloys, magnesium-aluminum- strontium alloys, magnesium-aluminum-silicon alloys, magnesium-rare earth metal-zinc alloys, magnesium-silver-rare earth metal alloys and magnesium-yttrium-rare earth metal alloys. 5. A low-friction sliding mechanism according to claim 1, wherein each of the sliding surfaces of the first and second sliding member has an arithmetic mean roughness of 0.1 μm or less. 6. A low-friction sliding mechanism according to claim 1, wherein the first sliding member comprises a base and a coating of the diamond-like carbon material applied to the base to define the sliding surface, the coating has a thickness of 0.3 to 2.0 μm and a micro Vickers hardness HV of 1000 to 3500 as measured by application of a 10 g load, the second sliding member is made of the aluminum-based alloy material, and the sliding surface of the second sliding member has a Brinell hardness HB of 80 to 130. 7. A low-friction sliding mechanism according to claim 1, wherein the first sliding member comprises a base and a coating of the diamond-like carbon material applied to the base to define the sliding surface, the coating has a thickness of 0.3 to 2.0 μm and a micro Vickers hardness HV of 1000 to 3500 as measured by application of a 10 g load, the second sliding member comprises an magnesium-based alloy material, and the sliding surface of the second sliding member has a Brinell hardness HB of 45 to 95. 8. An internal combustion engine comprising a low-friction sliding mechanism according to claim 1. 9. A low-friction sliding mechanism according to claim 1, wherein the fatty-ester friction modifier and the aliphatic-amine friction modifier comprise C6-C30 straight or branched hydrocarbon chains, respectively, and the lubricant comprises 0.05 to 3.0% by mass based on the total mass of the lubricant of the at least one of the fatty-ester friction modifier and the aliphatic-amine friction modifier. 10. A low-friction sliding mechanism according to claim 1, wherein the lubricant further comprises polybutenyl succinimide and/or a derivative thereof. 11. A low-friction sliding mechanism according to claim 10, wherein the lubricant comprises 0.1 to 15% by mass based on the total mass of the lubricant of the polybutenyl succinimide and/or the derivative. 12. A low-friction sliding mechanism according to claim 1, wherein the lubricant further comprises zinc dithiophosphate in an amount of 0.1% or less by mass in terms of an phosphorus element based on a total mass of the lubricant. 13. A low-friction sliding mechanism, comprising: a first sliding member having a sliding surface, at least the sliding surface of the first sliding member comprising a diamond-like carbon material wherein the diamond-like carbon material of the first sliding member is hydrogen-free amorphous carbon;a second sliding member having a sliding surface slidable relative to the sliding surface of the first sliding member, the second sliding member consisting essentially of a diamond-like carbon material; anda lubricant applied to the sliding surfaces of the first and second sliding members, the lubricant comprising friction modifier.
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