Abstract
This paper presents a study on the effect of radial clearance between a planet gear and shaft on the root stress of a planet gear. The stress analysis of planet gears with various radial shaft clearances by the 2-dimensional finite element method (FEM), in which the elastic contact between a planet gear and shaft was taken into consideration, was carried out under different normal tooth loads, and the relation between the root stress and normal tooth load, the effect of radial shaft clearance on root stress, the position of maximum root stress and the cyclic stress under running conditions were examined. Furthermore stress analysis of planet gears with various radial shaft clearances and rim thicknesses was carried out and the stress state of a planet gear with radial shaft clearance was clarified to a considerable extent.
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