Miniaturization of Involute-Splined Couplings : Discussion from Torsional Stiffness and Yield Torque

Abstract

The formula for the torsional stiffness and those for the yield torque of small involute splined shaft couplings are derived under some assumptions. Then the four kinds of small splined shaft couplings are made and tested. Those torsional stress compared with the theoretical ones. Consequently it is found that the assumptions are suffucient for a practical use, and the formula are useful to estimate the torsional characteristics. Moreover the effects of some parameters on the torsional characteristics of the splined shaft couplings are studied with the formula. And some instruction for the miniaturization of the couplings are obtained.