[미국특허]
APPLYING POLYMER COATING CONNECTING ROD SURFACES FOR REDUCED WEAR
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
F16C-007/02
B05D-001/18
B05D-001/28
B05D-001/02
출원번호
US-0710918
(2015-05-13)
공개번호
US-0123381
(2016-05-05)
발명자
/ 주소
OVARES, PAUL MATTHEW
TOTH, JAMES R.
출원인 / 주소
OVARES, PAUL MATTHEW
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A wear resistant coating is applied to the thrust surfaces and bore surfaces of a connecting rod. The wear resistant coating includes a polymer matrix, such as polyamide imide (PAI), solid lubricant, and hard particles including Fe2O3. The wear resistant coating is typically applied by spraying or r
A wear resistant coating is applied to the thrust surfaces and bore surfaces of a connecting rod. The wear resistant coating includes a polymer matrix, such as polyamide imide (PAI), solid lubricant, and hard particles including Fe2O3. The wear resistant coating is typically applied by spraying or rolling. The wear resistant coating adheres well to metal and provides lubrication. Thus, the wear resistant coating can reliably reduce wear, scuff, and seizure along the surfaces of the connecting rod as the piston reciprocates and crank shaft rotates during operation of the internal combustion engine. The likelihood of engine contamination caused by metal shavings from wear of the connecting rod is reduced, and the life of the connecting rod and engine is increased.
대표청구항▼
1. A connecting rod for connecting a crankshaft to a piston of an internal combustion engine, comprising: a body formed of metal extending longitudinally from a first end to a second end;said body including a first thrust portion adjacent said first end, a second thrust portion adjacent said second
1. A connecting rod for connecting a crankshaft to a piston of an internal combustion engine, comprising: a body formed of metal extending longitudinally from a first end to a second end;said body including a first thrust portion adjacent said first end, a second thrust portion adjacent said second end, and a stem connecting said first thrust portion to said second thrust portion;said first thrust portion including a pair of first thrust surfaces facing opposite one another and encircling a first bore for receiving a crankshaft,said second thrust portion including a pair of second thrust surfaces facing opposite one another and encircling a second bore for receiving a wrist pin; anda wear resistant coating applied to at least one of said thrust surfaces, said wear resistant coating including polymer, solid lubricant, and particles formed of Fe2O3. 2. The connecting rod of claim 1, wherein said wear resistant coating includes said polymer in an amount of at least 40 vol. %, said solid lubricant in an of 5.0 to 40.0 vol. %, and said Fe2O3 particles in an amount of 0.1 to 15.0 vol. %, based on the total volume of said wear resistant coating. 3. The connecting rod of claim 2, wherein said polymer includes polyamide imide (PAI) in an amount of at least 85 vol. %, based on the total volume of said wear resistant coating; said solid lubricant includes one or more components selected from: MoS2, graphite, WS2, hexagonal boron nitride (h-BN), PTFE, and metal sulfides in a total amount of 5.0 to 30.0 vol. %, based on the total volume of said wear resistant coating; and said Fe2O3 particles have a D50 particle size of 0.1 to 5.0 microns and are present in an amount of 3.0 to 8.0 vol. %, based on the total volume of said wear resistant coating. 4. The connecting rod of claim 1, wherein said polymer includes at least one of polyarylate, polyetheretherketone (PEEK), polyethersulfone (PES), polyamide imide (PAI), polyimide (PI), expoxy resin, polybenzimidazole (PBI), silicone resin, polyester, and silicone. 5. The connecting rod of claim 4, wherein said polymer of said wear resistant coating includes polyamide imide (PAI). 6. The connecting rod of claim 1, wherein said solid lubricant of said wear resistant coating includes at least one of MoS2, graphite, WS2, hexagonal boron nitride (h-BN), PTFE, and metal sulfides. 7. The connecting rod of claim 1, wherein said Fe2O3 particles have a D50 particle size of 0.1 to 5.0 microns. 8. The connecting rod of claim 1, wherein said wear resistant coating is applied to a thickness of 5 to 50 microns. 9. The connecting rod of claim 1, wherein each of said bores is formed by a bore surface extending perpendicular to said thrust surfaces, and said wear resistant coating is applied to at least one of said bore surfaces. 10. The connecting rod of claim 1, wherein said body is formed of steel material, said first bore is formed by a first bore surface extending perpendicular to said first thrust surfaces, said first bore surface surrounds a first center axis and presents a first diameter, said second bore is formed by a second bore surface extending perpendicular to said second thrust surfaces, said second bore surface surrounds a second center axis parallel to said first center axis and presents a second diameter being smaller than said first diameter. 11. A connecting rod for connecting a crankshaft to a piston of an internal combustion engine, comprising: a body formed of steel material extending longitudinally from a first end to a second end;said body including a first thrust portion adjacent said first end, a second thrust portion adjacent said second end, and a stem connecting said first thrust portion to said second thrust portion;said first thrust portion including a pair of first thrust surfaces facing opposite one another and encircling a first bore for receiving a crankshaft, said first bore being formed by a first bore surface extending between and perpendicular to said first thrust surfaces, said first bore surface surrounding a first center axis and presenting a first diameter,said first thrust portion including a pair of openings at said first end on opposite sides of said first bore for receiving fasteners;said first thrust portion including a bearing cap at said first end between said openings;said second thrust portion including a pair of second thrust surfaces facing opposite one another and encircling a second bore for receiving a wrist pin, said second bore being formed by a second bore surface extending between and perpendicular to said second thrust surfaces, said second bore surface surrounding a second center axis parallel to said first center axis and presenting a second diameter being smaller than said first diameter.a wear resistant coating applied to said thrust surfaces and said bore surfaces of said body;said wear resistant coating having a thickness of 5 to 20 microns;said wear resistant coating including polyamide imide (PAI) in an amount of at least 80.0 volume percent (vol. %), based on the total volume of said wear resistant coating;said wear resistant coating including solid lubricant selected from one or more of: MoS2, graphite, WS2, hexagonal boron nitride (h-BN), PTFE, and metal sulfides in a total amount of 5.0 to 30.0 vol. %, based on the total volume of said wear resistant coating;said wear resistant coating including particles formed of Fe2O3 in an amount of 3.0 to 8.0 vol. %, based on the total volume of the wear resistant coating;said Fe2O3 particles having a D50 particle size of 0.1 to 5.0 microns; andsaid wear resistant coating include at least one hard particle in addition to said Fe2O3 particles in an amount of 3.0 to 5.0 vol. %, based on the total volume of said wear resistant coating;said at least one additional hard particle selected from: metal nitrides, metal carbides; metal oxides, metal silicides, metal borides, metal phosphides, intermetallic compounds, metal oxynitrides, metal carbonitrides, metal oxycarbides, and metal powders of Ag, Pb, Au, SnBi and/or Cu. 12. A method of manufacturing a connecting rod for connecting a crankshaft to a piston of an internal combustion engine, comprising the steps of: providing a body formed of metal extending longitudinally from a first end to a second end, the body including a first thrust portion adjacent the first end and a second thrust portion adjacent the second end and a stem connecting the first thrust portion to the second thrust portion, the first thrust portion including a pair of first thrust surfaces facing opposite one another and encircling a first bore for receiving a crankshaft, and the second thrust portion including a pair of second thrust surfaces facing opposite one another and encircling a second bore for receiving a wrist pin; andapplying a wear resistant coating to at least one of the thrust surfaces of the body, the wear resistant coating including polymer, solid lubricant, and particles formed of Fe2O3. 13. The method of claim 12, wherein the step of applying the wear resistant coating includes providing the wear resistant coating in the form of liquid or powder, and applying the liquid or powder to the at least one thrust surface. 14. The method of claim 13, wherein the step of applying the wear resistant coating to the at least one thrust surface includes at least one of spraying, rolling, dipping, brushing, atomizing, and printing. 15. The method of claim 12, wherein the step of applying the wear resistant coating includes applying the wear resistant coating to a thickness of 5 to 50 microns. 16. The method of claim 12 including curing the wear resistant coating after applying the wear resistant coating to the at least one thrust surface. 17. The method of claim 12, wherein the bores are formed by bore surfaces extending perpendicular to the thrust surfaces, and further including the step of applying the wear resistant coating to at least one of the bore surfaces. 18. The method of claim 12, wherein the wear resistant coating includes the polymer in an amount of at least 40 vol. %, the solid lubricant in an amount of 5.0 to 40.0 vol. %, and the Fe2O3 particles in an amount of 0.1 to 15.0 vol. %, based on the total volume of the wear resistant coating. 19. The method of claim 18, wherein the polymer includes at least one of polyarylate, polyetheretherketone (PEEK), polyethersulfone (PES), polyamide imide (PAI), polyimide (PI), expoxy resin, polybenzimidazole (PBI), silicone resin, polyester, and silicone; the solid lubricant includes at least one of MoS2, graphite, WS2, hexagonal boron nitride (h-BN), PTFE, and metal sulfides; and the Fe2O3 particles have a D50 particle size of 0.1 to 5.0 microns. 20. The method of claim 19, wherein the polymer includes polyamide imide (PAI) in an amount of at least 85 vol. %, based on the total volume of the wear resistant coating; the solid lubricant includes one or more components selected from: MoS2, graphite, WS2, hexagonal boron nitride (h-BN), PTFE, and metal sulfides in a total amount of 5.0 to 30.0 vol. %, based on the total volume of the wear resistant coating; and the Fe2O3 particles have a D50 particle size of 0.1 to 5.0 microns and are present in an amount of 3.0 to 8.0 vol. %, based on the total volume of the wear resistant coating.
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