The innovation was to develop a gear geometry that reduces or eliminates gear noise and increases the strength of gears. Gear noise is a common problem in all bevel and hypoid gear drives. A variety of expensive gear geometry optimizations are applied daily in all hypoid gear manufacturing plants, to reduce gear noise. In many cases those efforts have little success. Additional expensive finishing operations (lapping after the grinding) are applied to achieve the goal of quiet and stong gear sets. The ultimate motion graph is a concept for modulating the tooth surfaces that uses a physical effect to cancel out the dynamic disturbances that are naturally generated by all up-to-date known kind of gears. The ultimate motion graph also eliminates the sensitivity of gears against deflection under load or displacements because of manufacturing tolerances. Lower dynamic disturbances will also increase the dynamic strength. [S1050-0472(00)00203-8]

Issue Section:
Technical Papers
Keywords:
Bevel Gears, Hypoid Gears, Motion Graph, Noise Reduction, Bevel Gear Grinding, Ease-off, Adjustability, mechanical contact, noise, design engineering, mechanical strength, rolling
Topics:
Gears, Grinding, Noise (Sound), Spiral bevel gears, Stress, Errors, Deflection
1.
Stadtfeld, H. J., 1993, Handbook of Bevel and Hypoid Gears, Calculation, Manufacturing and Optimization, Rochester Institute of Technology, Rochester, New York.
2.
1981, Understanding Tooth Contact Analysis, Gleason, Rochester, New York.
3.
Litvin, F. L., Tsung, W. J., Coy, J. J., and Heine, C., 1985, “Generation of Spiral Bevel Gears with Zero Kinematical Errors and Computer Aided Tooth Contact Analysis,” World Congress on Gearing, Paris, France.
4.
Stadtfeld, H. J., 1995, Flank Modifications in Bevel Gears using a Universal Motion Concept, Gleason, Rochester, New York.
5.
Litvin
,
F. L.
, and
Zhang
,
J.
,
1989
, “
Topology of Modified Helical Gears
”
Surf. Topol.
,
2
, No.
1
, pp.
41
–
59
.
6.
Zhang
,
Y.
,
Litvin
,
F. L.
, and
Handschuh
,
R. F.
,
1995
, “
Computerized Design of Low-Noise Face Milled Spiral Bevel Gears
,”
Mech. Mach. Theory
,
3
, No.
8
, pp.
1171
–
1178
.
Copyright © 2000
 by ASME
You do not currently have access to this content.