Study on High Reduction Face Gears

3rd Report, Proposal of Simplified Design Method

Abstract

It is a troublesome problem to decide design parameters for face gears. In this paper, a simplified design method for face gears is proposed. In the method, meshing of face gears at a certain gear radius is approximately substituted with that of the pinion and a virtual rack. Under this approximation, the shape of the virtual rack (pressure angle and module) is decided and both root and tip interference limits and tip pointing limit in face gearing are analyzed by investigating the meshing of the pinion and the virtual rack. Those limits were almost agreed with that of the strict calculation shown in the first report. As a result, it was found that the simplified method could be used to estimate efficiently the design parameters for face gears. In addition, an equation to give an offset to design a compact face gear set will be proposed.