Cylindrical Gears with Changing Ratio

  • András Bendefy Department of Machine and Product Design, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Hungary
  • Péter Horák Department of Machine and Product Design, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Hungary

Abstract

Changing ratio gears are noncircular. It means that if they are combined with a conventional cylindrical gear a changing axis distance will be given. Changing axis distance can generate a lot of difficulties and additional costs in the construction. Our goal was to create changing ratio gears that have cylindrical geometry and interlock with conventional cylindrical gears at a constant axis distance. This can be achieved by applying continuously changing profile shift. Profile shift modifies the diameter of the gears, however it does not have any effect on the ratio; regardless if that is constant or changing. The point of our calculation is that some gears with noncircular rolling curves can have circular pitch curve with the help of changing profile shift.

Keywords: gears, noncircular gears, changing profile shift, changing ratio, changing axis distance, envelope
Published online
2017-03-02
How to Cite
Bendefy, A. and Horák, P. (2017) “Cylindrical Gears with Changing Ratio”, Periodica Polytechnica Mechanical Engineering, 61(2), pp. 130-134. https://doi.org/10.3311/PPme.9870.
Section
Articles