This paper draws attention to pin gearing for its antibacklash gear property. The gear tooth curve derived from a cycloidal curve furnishes the pin gearing with kinematic antibacklash, low pressure angle, and no interference among other features. The pins on one side of a centerline are contacting the forward faces of the mating tooth gear. Simultaneously the pins on the other side of the centerline are contacting the backward faces of the gear. The correct center distance can be maintained by applying a force directed to each other center for multiple contacts. A generating method of gear manufacture is also suggested. Contact and bending deformations as well as the gear stress are analyzed to help its engineering design.

Issue Section:
Power Transmission and Gearing
Topics:
Deformation, Design, Engineering design, Gear teeth, Gears, Kinematics, Pins (Engineering), Pressure, Stress
1.
Brown, G. T., and Stewart, D. A., U.S. Patent No. 4,998,442, Mar. 1991.
2.
Doughtie, V. L., and James, W. H., Elements of Mechanism, John Wiley & Sons, 1954.
3.
Drago, R. J., Gear Design, Chap. 1, Butterworths, 1988.
4.
Kamm, L. J., Designing Cost-Efficient Mechanisms, Chap. 16, 1990.
5.
Kerkhoff, E. F., U.S. Patent No. 4,879,920, Nov. 1989.
6.
Landau, L. D., and Lifshitz, E. M., Theory of Elasticity, Sec. 9, Pergamon Press, 1970.
7.
Litvin, F. L., Gear Geometry and Applied Theory, Sec. 13. 5, Prentice-Hall, 1994.
8.
Young, W. C., Roark’s Formulas for Stress and Strain, 6th ed., McGraw-Hill 1989.
This content is only available via PDF.
Copyright © 1998
 by The American Society of Mechanical Engineers
You do not currently have access to this content.