A kind of modified hourglass worm drives, which is frequently called the type II worm gearing for short, has various favorable meshing features. Nevertheless, its sole shortcoming is the undercutting of the worm wheel. In the condition of adopting slight modification, this problem can be overcome due to the removal of a part of one sub-conjugate area containing the curvature interference limit line. In order to measure the effect of the avoidance of undercutting, a strategy to determine the meshing point in the most severe condition is proposed for a type II worm drive. The presented strategy can be divided into two steps. The first step is to establish a system of nonlinear equations in five variables in accordance with the theory of gearing. The second step is to solve the procured nonlinear equations by numerical iterative method to ascertain the meshing point required. A numerical example is presented to verify the validity and feasibility of the proposed scheme.
- Design Engineering Division and Computers and Information in Engineering Division
Determination of the Most Dangerous Meshing Point for Modified Hourglass Worm Drives
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Zhao, Y, & Wu, T. "Determination of the Most Dangerous Meshing Point for Modified Hourglass Worm Drives." Proceedings of the ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 8: 11th International Power Transmission and Gearing Conference; 13th International Conference on Advanced Vehicle and Tire Technologies. Washington, DC, USA. August 28–31, 2011. pp. 181-187. ASME. https://doi.org/10.1115/DETC2011-47202
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