| 摘要 |
PURPOSE:To prevent reduction of bending strength while maintaining the tooth face strength by profile shifting a WN gear with a tool based on a referential rack tooth profile having the tooth end and the tooth root formed with a involute curve while the intermediate section is connected with lines. CONSTITUTION:In a referential rack profile, convex and concave curves are employed respectively for the tooth end and the tooth root while the intermediate section is connected with line. Here, the curvature is reduced toward the tooth tip at the tooth end while increased toward the tooth bottom at the tooth root and the curvature of an involute curve at the tooth end is made larger than that at the tooth root at the contacting point with the intermediate line. When profile shifting with a tool based on the referential rack tooth, linear contact or similar contact can be achieved locally at the gearing point. |
