Reduction of Tooth Fillet Stresses Using Novel One-Sided Involute Asymmetric Gear Design

Abstract

For increasing the load carrying capacity of geared power transmissions several tooth designs alternative to the standard involute have been proposed. The use of non-involute teeth has a number of disadvantages and for this reason asymmetric involute-type teeth have been studied as a promising alternative. In this article the idea of one-sided involute asymmetric spur gear teeth is introduced to increase load carrying capacity and combine the good meshing properties of the driving involute and the increased strength of non-involute curves. These novel teeth are intended for constant direction of rotation, although they can be used in a limited way for reverse rotation. Both profiles are fully generated by a hob, the design of which is also investigated. The increase in load carrying capacity can reach up to 28{%} compared to the standard 20° involute teeth.

Keywords:

• Asymmetric teeth
• Circular fillet
• FEA
• Root stress
• Spur gears

Notes

^#Communicated by C. Spitas.