Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
In this study, a tooth profile design method is developed for a three-lobes strain wave gearing and the responsive design software is developed in AutoCAD surrounding. A three-lobes strain wave gearing is designed by the developed software. Then stress analysis is conducted for the flex-spline when it is deformed by the three-lobes wave-generator using specially developed finite element method software. This analysis is also conducted for the flex-spline when it is deformed by a two-lobes wave-generator in order to know the effects of the lobe numbers on the stresses occurred in the flex-spline. Based on the calculation results, it is found that the maximum load on the ball surfaces is increased by approximately 65% and there is almost on difference in the shear stress that causes diaphragm fatigue cracking failure when the two-lobes wave-generator is changed into three-lobes wave-generator. In addition, it was confirmed that the bending stress at the root of the tooth was reduced by about 20%.
