2013 Fiscal Year Final Research Report
Bending Strength Design of Thin-Rimmed Helical Gears with Various Web Arrangements
| Project/Area Number |
23560161
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Tottori University |
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Principal Investigator |
MIYACHIKA Kouitsu 鳥取大学, 工学(系)研究科(研究院), 教授 (30157664)
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| Co-Investigator(Kenkyū-buntansha) |
KOIDE Takao 鳥取大学, 工学研究科, 教授 (60127446)
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| Project Period (FY) |
2011 – 2013
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| Keywords | はすば歯車 / 歯元応力 / 曲げ疲労強度 / 薄肉構造 / 機械要素 / ねじれ角 / かみ合い率 / リム・ウェブ厚さ |
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| Research Abstract |
Root stresses of thin-rimmed helical gears with web arrangement were measured, and then effects of rim and web thicknesses and web structure on root stress in meshing process, the maximum root stress and the worst meshing position were determined. Bending fatigue tests were carried out for the thin-rimmed helical gear meshed at the worst meshing position, and then S-N curves and bending fatigue limit loads were obtained. The main results obtained are summarized as follows. (1)Th worst meshing posiition of thin-rimmed helical gear is near the outer point of single tooth pair contact in the case of of small helix angle and is the backward position a little from the pitch point of the end of face width of leading side in the case of large helix angle. (2) The bending fatigue strength of thin-rimmed helical gear has not a influence of web position in the case of thin rim and web, and the effect of helix angle is also considerably small compared with the case of root stress.
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