DESIGNING PITCH CURVES OF NON-CIRCULAR GEARS

Abstract

The paper examines the design and generation of gear drives with non-circular gears. Gearings with a changing transmission gear ratio are used for the purposes of practical experimentation, even though “standard” gearings with a constant transmission gear ratio are used more often. In this paper, the author presents the design for the shape of a pitch outline for a specific requirement, that is, continuous change in gear ratio during one rotation. The gearing is designed such that the pitch curve is composed of an ellipse. The article also presents some kinematic properties of the designed non-circular gearing.

Keywords

• gear
• non-circular
• ellipse
• pitch outline
• variable transmission ratio