Analysis of Gear Quality Criteria and Performance of Curved Face width Spur Gears

Abstract

For plastic gears, developments in composites and tooth geometry are essential for their selection in power transmissions. In order to enhance the transmissible power level of the plastic spur gears, an arc-shaped tooth is designed, with variable height along the gear face width. There are two parameters that influence the tooth geometry: the radius of the generating point, defining the tooth curvature, and the tool axis inclination, leading to a tooth height variation. The paper deals with computerized design of the curved face width spur gear, as a replacement of the traditional numerical procedure, focused on tooth surface generation, contact analysis and stress calculation. The procedure enabled the correlation of the gear defining parameters such that interference could be avoided. The gears mesh simulation illustrated the path of contact geometry and enabled a proper load distribution for the finite element analysis. Compared to other standard spur gears, the designed curved face width spur gears exhibited a higher bending resistance.