Hybrid gear drive

Details Hybrid gear drive Hybrid gear drive

1998-05-12

2000-10-10

Herrmann, Allan D.

Machine element or mechanism

Gearing

Teeth

74416, 74425, 74462, 244 1711, 416170R, F16H 116, F16H 5508, F16H 5522

Patent

active

061289698

ABSTRACT:
A hybrid gear drive suitable for the transformation of motion and power between an involute worm and a face gear wherein the axis of the face gear and the worm may be crossed or intersected. The gear drive includes a multi-thread involute worm in meshing engagement with a face gear having helical teeth. The multi-thread involute worm threads each have a driving surface and a coasting surface formed in the profiles of the involutes of a pair of base circles having different radii. The gear drive allows practical gear ratios up to about ten for high speed, high load applications such as helicopter or automobile gearboxes.

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Article entitled "Computer Methods In Applied Mechanics and Engineering", I. H. Seol and F. L. Litvin, Department of Mechanical Engineering, University of Illinois at Chicago, Chicago, IL., Nov. 1, 1995, pp. 73-103.
Ewert, Richard H., Gears and Gear Manufacture--The Manufacture, Chapman & Hall, New York, 1997, pp. 2-32.
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Litvin, Faydor L., Gear Geometry and Applied Theory, Prentice Hall, New Jersey, 1994, Chapter 11, pp. 490-525.
Litvin F.L., A.M. Egelja, and M. De Donno. "Computerized Determination of Singularities and Envelopes to Families of Contact Lines on Gear Tooth Surfaces." Computer Methods in Applied Mechanics and Engineering. (1998) pp. 23-34.
Litvin F.L., M. De Donno, Q. Lian, and S.A. Lagutin. "Alternative Approach for Determination of Singularity of Envelope to a Family of Parametric Surfaces." Computer Methods in Applied Mechanics and Engineering. (1998) pp. 153-165.
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