Computerized investigation of straight and face-hobbed spiral bevel gears.

摘要

This thesis covers the geometry and tooth contact analysis of face-hobbed spiral bevel gears and forging straight bevel gears, and also the finite element analysis of the forging straight bevel gears.; A unique geometry of the face-hobbed spiral bevel gears is developed upon the idea of epicycloidal gearing. The straight bevel gear geometry is developed for forging purpose. In both cases, the gear surfaces are modified to provide a localized bearing contact and a predesigned parabolic function of transmission errors. This enables to reduce the sensitivity of the gears to the shift of the bearing contact and reduce as well the gear noise caused by errors of alignment.; The meshing and contact of the gears have been simulated by computer programs. Results show that the gears are stable, and the transmission errors are absorbed. The finite element analysis is applied on the straight bevel gears. The stress and load share are determined by the results of the finite element method.