Performance Analysis of Spur Gears with Pitch Phase Shift

Abstract

With the advancement of civilization, mankind has designed various mechanical devices, several of which incorporate mechanical elements such as gears. However, to keep up with the constantly evolving modern technology and for the future development of mechanical devices, it is important to develop gears with smaller transmission errors compared to those of conventional gears. In this study, two plastic spur gears were aligned with different pitch phases and glued together to produce spur gears with pitch phase shift. The spur gears with pitch phase shift were designed to have a better meshing ratio and reduced transmission error. The transmission error was measured in four different patterns: normal spur gears, spur gears with pitch phase shift, spur gears with pitch phase shift and varying pitch displacements, and spur gears with pitch phase shift and varying torque. Using spur gears with pitch phase shift, we successfully reduced the transmission error to less than half that of a normal gear. As a result, the greatest reduction in transmission error was achieved when the gear was shifted by exactly half a pitch.