Asymmetric modified spur gear drives: reduction of noise, localization of contact, simulation of meshing and stress analysis

An asymmetric spur gear drive is considered. The asymmetry means that larger and smaller pressure angles are applied for the driving and coast sides, respectively. The conventional design of such a drive is based on application of involute profiles. The authors propose a modified geometry of an asymmetric spur gear drive designed as a combination of ail involute gear and a double crowned pinion that enables to localize and stabilize the beating contact and obtain a favorable shape of transmission errors of reduced magnitude. Computerized dc sign of spur gears of proposed geometry and simulation of their meshing and contact have been developed. A method of generation of a double-crowned pinion has been developed as well stress analysis of symmetric and asymmetric spur gears have been accomplished, that confirm reduction of contact and bending stresses for an asymmetric spur gear drive. The developed theory is illustrated with numerical examples. (C) 2000 Elsevier Science S.A. All rights reserved.