Stress Analysis of Hourglass Worm Gear : 1st Report, Case of Classical Hindley Worm Gear

Abstract

While many geometrical studies on the hourglass worm gear have been reported, there are few studies on its intensity. In this paper the root stress distribution in the direction of the tooth trace and the stress distribution in the direction of the tooth depth are measured by the three-dimensional photoelastic method, when a pair of classical hindley worm gear are loaded statically. The results indicate that maximum tensile stress is generated on the root of the tooth which is located at 60 degrees to 70 degrees from the contact markings along the worm tooth trace.