Transmission error in offset toothed double helical synchronous belt drives (in quasi-static condition)

Abstract

Some studies have shown that offset toothed double helical synchronous belts (OTDHSB) have lower transmission noise and higher fatigue life than straight toothed synchronous belts (STSB). However, the transmission errors of these belts have not been reported. The present study aims to elucidate the mechanisms of the transmission error due to the belt climbing at the beginning of the meshing and at the end of meshing. In theoretical analysis, a model was established under quasi-static conditions. The results of the model used to calculate the transmission error of the helical synchronous belt (HSB) agreed closely with the published paper results. And then, the influence of the belt width, the helical angle and the offset coefficient on the transmission error was studied using the model. Computational results revealed that the amplitude of the transmission error decreases as the increasing of the offset coefficient, belt width, and helical angle when the offset coefficient and helical ratio are less than 0.5 and 1 respectively. In addition, the amplitude of the transmission error is equal to zero when the offset coefficient and helical ratio are equal to 0.5 and an integer respectively.

Keywords

• belt width
• helical synchronous belt
• helical angle
• offset toothed double helical synchronous belt
• transmission error