Noncircular Gears: Geometry and Visualization MODEL Development.

Accession Number

ADA560949

Publication Date

Jan 2012

Media Count

20p

Personal Author

D. Stringer

Abstract

Circular gears are optimized to provide constant torque and speed ratio with low noise. In conventional automotive applications, a transmission provides the required power, torque, and speed settings using a finite arrangement of gear sets, which limits the range of transmission gear ratios, resulting in a loss of efficiency. However, other transmission configurations operate over a continuous range of gear ratios, providing a continuous range of output speeds while maintaining constant input shaft speed. Circular gears are not always practical for these configurations. One solution incorporates noncircular gears. The asymmetry of a noncircular gear pair results in instantaneously changing gear properties throughout gear rotation. This report presents a method for determining the required parameters to produce a noncircular gear pair of desired velocity and torque ratio distribution. Finally, to graphically depict the noncircular effects on gear motion, torque, and velocity distributions, a visualization model has been developed.

Keywords

Automotive components
Gear analysis
Gear geometry
Noncircular gears
Rotation
Shape
Transmission gears


$15.00-Electronic Document $30.00-Customized CD $33.00-COLOR DOCUMENT

Source Agency

Non Paid ADAS

NTIS Subject Category

85 - Transportation
41J - Tooling, Machinery, & Tools

Corporate Author

Army Research Lab., Cleveland, OH. Vehicle Technology Directorate.

Document Type

Technical report

Title Note

Final rept.

NTIS Issue Number

1222

Contract Number

N/A

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