[특허]Polished gear surfaces

[미국특허] Polished gear surfaces 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16H-001/04 F16H-057/04
출원번호	US-0607958 (2000-06-30)
발명자 / 주소	Zhu, Dong Bujold, Michael Watts, Patrick
출원인 / 주소	Eaton Corporation
대리인 / 주소	Rader, Fishman & Grauer PLLC
인용정보	피인용 횟수 : 23 인용 특허 : 8

초록 ▼

An optimally finished gear has a surface roughness between approximately 5 micro-inches Ra to 10 micro-inches Ra. The reduced surface roughness, when located at the gear teeth, can reduce the maximum contact stress by more than fifty percent. Similarly, the subsurface shear stress can be reduced by approximately thirty percent. The reduced contact stress and reduced shear stress results from improved lubrication conditions between the gear teeth. Surface roughness greater than 10 micro-inches Ra results in increased contact of the surface peaks, while surface roughness lower than 3 micro-inches is too smooth to retain adequate lubrication between the gear teeth.

대표청구항 ▼

1. A lubricated gear set, comprising: a first gear having a first surface finish and including a first lubrication film thickness; and a second gear engaging said first gear and having a second surface finish different from said first surface finish, said second gear including a second lubrication film thickness different from said first lubrication film thickness; wherein said first surface finish has an arithmetic mean roughness of approximately 3 micro-inches to approximately 12 micro-inches. 2. The gear set of claim 1, wherein said first or said second gear is selected from a spur gear, an internal gear, a helical gear, a herringbone gear, a bevel gear, a worm gear or a planetary gear.3. The gear set of claim 1, wherein said first surface finish has an arithmetic mean roughness of approximately 5 micro-inches to approximately 10 micro-inches.4. The gear set of claim 1, wherein said second surface finish has an arithmetic mean roughness outside of the range of approximately 3 micro-inches to approximately 12 micro-inches.5. The gear set of claim 4, wherein said second surface finish has an arithmetic mean roughness greater than approximately 12 micro-inches.6. The gear set of claim 4, wherein said second surface finish has an arithmetic mean roughness less than approximately 3 micro-inches.7. The gear set of claim 4, wherein a lubricant is disposed between said first gear and said second gear, and wherein said first and second surface finishes are adjusted such that a total wear reduction between said gears is optimized to permit the continued presence of said lubricant.8. A gear set, comprising: a first gear engaging a second gear, a first wear reduction means employing a lubricant having a film thickness; and a second wear reduction means employing a first surface finish on one of said first and second gears, and a second surface finish on the other said gears, wherein said second surface finish is different from said first surface finish, and; wherein said film thickness is dependent upon the roughness of said first surface finish and optimized when said first surface finish has an arithmetic mean roughness of approximately 3 micro-inches to approximately 12 micro-inches. 9. The gear set of claim 8, wherein said first or said second gear is selected from a spur gear, an internal gear, a helical gear, a herringbone gear, a bevel gear, a worm gear or a planetary gear.10. The gear set of claim 8, wherein said first surface finish has an arithmetic mean roughness of approximately 5 micro-inches to approximately 10 micro-inches.

이 특허에 인용된 특허 (8) 인용/피인용 타임라인 분석

Hashimoto Fukuo F. H. (North Canton OH) Zhou Rao-Sheng (Canal Fulton OH) Howlett Kevin (North Canton OH), Bearing surfaces with isotropic finish.
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Franco Melvin A. (Detroit MI), Gear polishing.
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Michaud Mark D. (Bristol CT), Metal surface refinement using dense alumina-based media.
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Lenz Sieghart (Berlin DEX) Ulrich Hans-Joachim (Berlin DEX) Ruhle Jurgen (Nassenheide DEX), Method and mechanism for the grinding of groove-shaped external profiles on work pieces.
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Michaud Mark D. (Bristol CT) Michaud Robert G. (Bristol CT) Tirendi Frank (Hamden CT) Zobbi Robert G. (Southbury CT), Method for refinement of metal surfaces.
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Barnsby Roger Michael ; McKibbin Albert Hunt ; Aufischer Rainer Werner,ATX, Method of making a coated planet gear journal bearing.
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Cataldo Roy S. (Birmingham MI), Multi-speed power transmission.
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Shimono Nobuo (Fukuoka JPX) Honjoh Toshio (Fukuoka JPX) Itoh Yoshihiro (Fukuoka JPX) Yoshida Mamoru (Fukuoka JPX) Ide Hitoshi (Fukuoka JPX), Speed reduction motor with integral hermetic gear case.
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이 특허를 인용한 특허 (23) 인용/피인용 타임라인 분석

Mordukhovich, Gregory; Singh, Avinash, Apparatus and method of using a hardness differential and surface finish on mating hard gears.
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Wang, Qi; Schuster, Donald L., Chemical assisted lapping and polishing of metals.
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Yoshida, Hitoshi; Yoshioka, Hidekazu; Sakai, Takahiro; Shimizu, Yoshihiro; Yamashita, Toshio, Contact and method for manufacturing the contact.
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Olsommer, David; Essinger, Olivier, Electric assist device for a bicycle and electrically assisted bicycle provided with such a device.
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Olsommer, David; Essinger, Olivier, Electrical assistance device for a bicycle and electrically assisted bicycle provided with such a device.
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Maurin-Perrier, Philippe; Ledrappier, Florent; Mourier, Louis; Donnet, Christophe; Audouard, Eric; Mazuyer, Denis, Friction piece in a lubricated medium, working at contact pressures higher than 200 MPa.
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Sato, Masanori; Abe, Katsufumi, Gear.
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Satou, Masanori; Nakano, Yoshiyasu; Abe, Katsufumi, Gear and gear drive unit.
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Satou, Masanori; Nakano, Yoshiyasu; Abe, Katsufumi, Gear and gear drive unit.
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Nakura, Makoto; Kawamoto, Masaru; Ueda, Naoto; Ohkushi, Hirofumi, Gear drive apparatus, driving device including gear drive apparatus, and image forming device including gear drive apparatus.
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Cooper, Clark V.; Tulyani, Sonia; Karedes, Edward J.; Covington, Jefferi J.; Staroselsky, Alexander; Vinayak, Harsh, Gear having improved surface finish.
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Downey, Adam; Parrett, Dale H., Gear joint with super finished surfaces.
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Vinayak, Harsh; Hansen, Bruce D.; Karedes, Edward J.; Cooper, Clark V.; Zunski, Lawrence M., Gear tooth topological modification for reducing noise and vibration in transmission systems.
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Mittermair, Mario; Spitaler, Robert; Mueller, Alexander; Pamminger, Helmut, Gear wheel.
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Law,Chi, Geartrain coupling for a turbofan engine.
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Dreher, Ernst, Hand-held electrical shears.
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Bittner, Edward H., Machine for machining gear teeth and gear teeth machining method.
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Bittner, Edward H., Machine for machining gear teeth and gear teeth machining method.
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Sroka, Gary; Winkelmann, Lane W.; Michaud, Mark D., Method for inspecting and refurbishing engineering components.
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Szalony,Norman; Majors,David; Golembiewski, Jr.,Walt; Glowacki,Mitch; Horen,Kenneth, Shaft to transfer torque in a vehicle.
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Michaud, Mark; Summers, Edward David, Superfinishing large planetary gear systems.
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Michaud, Mark; Summers, Edward David, Superfinishing large planetary gear systems.
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Michaud, Mark; Summers, Edward David, Superfinishing large planetary gear systems.
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A	생활필수품
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[미국특허] Polished gear surfaces 원문보기