Abstract
In this chapter, the fundamentals of straight bevel geometry are given and the related main quantities are defined. Geometry of spherical involute and octoid toothing is introduced and implications on the cutting processes of these gears are analyzed. Tredgold approximation is then used to define the equivalent cylindrical gears and their main characteristic quantities, including the minimum number of teeth to avoid interference. Short notes are given on the reference profile modifications. The problem of straight bevel gears with profile-shifted toothing and variation of shaft angle is therefore dealt with in detail in an analytical way, also considering the effects of transverse tooth thickness modifications . The load analysis of these gears is then performed and the thrust characteristics on shafts and bearings are defined. Subsequently, the main kinematic quantities related to the rolling and sliding motions of the mating teeth surfaces are defined and the instantaneous and average efficiencies are analytically determined. Finally, short notes on the main cutting processes of these types of gears are given and suggestions for their construction and assembly are provided.
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Vullo, V. (2020). Straight Bevel Gears. In: Gears. Springer Series in Solid and Structural Mechanics, vol 10. Springer, Cham. https://doi.org/10.1007/978-3-030-36502-8_9
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DOI: https://doi.org/10.1007/978-3-030-36502-8_9
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