薄肉非対称ウェブ構造平内歯車の歯元応力(機械要素,潤滑,工作,生産管理など)

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This paper presents a study on the root stresses of thin-rimmed spur internal gears with asymmetric web arrangements for planetary gear units of the caterpillar drive of construction machinery and automatic transmissions of automobiles. Tooth deflections of thin-rimmed spur internal gears with asymmetric web arrangements due to a concentrated load in the normal direction of the tooth surface were calculated by the three-dimensional finite element method (3D-FEM). On the basis of the calculated results, an approximate equation for the influence function of tooth deflection was derived. The load sharing factor and the load distributions on contact lines were calculated using the approximate equation and Kubo and Umezawa's method. The root stresses of the thin-rimmed spur internal gear in mesh were calculated by 3D-FEM, and the maximum root stress and its position were examined. These results were also compared with those of the case of thick-rimmed or solid gears. Furthermore, a simplified calculation method of the load distribution on the contact line and the root stress of the thin-rimmed spur internal gear in mesh by 3D-FEM, considering the mating planet gear as a rigid body, was determined.
1997-06-25