Heuristic Search for the Design of Silent Chain Transmissions Using Graphs

Abstract

The problem of “rectangling” or “polygonal action” has not been solved for chain drives, either bush roller chains or toothed chains. The search for a fundamentally new chain design was carried out using the heuristic method of enhancement creative activity. It is shown how, using the heuristic techniques that make up the method, the designer comes step by step to a new design. In the proposed six design options, the “rectangling” effect is completely eliminated. The design with the location of the drive sprocket on a straight chain section is considered. In this case, the following types of gearings can be used: pin sprocket – cycloidal rack, involute sprocket – gear rack, involute sprocket – pin rack. A design option is possible, in which the sprocket engages in the section where the chain wraps the tension roller. The chain, when wraps the tension roller, forms a compound gear wheel. In this case, the following types of gearings can be used: pin gear – cycloidal sprocket, cycloidal gear – pin sprocket, involute gear – involute sprocket and cycloidal gear – cycloidal sprocket. A significant reduction in the dynamic loads acting on the chain has been achieved.