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RESEARCH PAPERS

Geometry and Investigation of Klingelnberg-Type Worm Gear Drive

[+] Author and Article Information
Faydor L. Litvin

Department of Mechanical and Industrial Engineering,  University of Illinois at Chicago, 842 W. Taylor Street, Chicago, IL, 60607-7022

Kenji Yukishima, Kenichi Hayasaka

Gear R&D Department, Research and Development Operations,  Yamaha Motor Co. Ltd., 2500 Shingai, Iwata, Shizuoka 438-8501, Japan

Ignacio Gonzalez-Perez

Department of Mechanical Engineering,  Polytechnic University of Cartagena, Campus Universitario Muralla del Mar, C∕Doctor Fleming, s∕n, 30202 Cartagena, Spain

Alfonso Fuentes1

Department of Mechanical Engineering,  Polytechnic University of Cartagena, Campus Universitario Muralla del Mar, C∕Doctor Fleming, s∕n, 30202 Cartagena, Spainalfonso.fuentes@upct.es

1

Corresponding author.

J. Mech. Des 129(1), 17-22 (Jun 05, 2006) (6 pages) doi:10.1115/1.2359477 History: Received January 26, 2006; Revised June 05, 2006

The computerized design, generation, and tooth contact analysis of a Klingelnberg-type cylindrical worm gear drive is considered wherein localization of contact is obtained by application of an oversized hob and mismatch geometries of hob and worm of the drive. A computerized approach for the determination of contacting surfaces and the investigation of their meshing and contact by tooth contact analysis is presented. The developed theory results in an improvement of bearing contact and reduction of sensitivity to misalignment. The theory is illustrated with numerical examples and may be applied for other types of cylindrical worm gear drives.

FIGURES IN THIS ARTICLE
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Copyright © 2007 by American Society of Mechanical Engineers
Topics: Worm gears , Disks , Equations
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References

Figures

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Figure 1

Coordinate systems Sc, Sw, and S0 applied for worm generation and generating cone surface

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Figure 2

Contact lines Lcw between the generating disk and worm on the worm surface

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Figure 3

Coordinate systems Sh, Sg, Sm, and Sn applied for generation of the worm gear

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Figure 4

Contact lines Lhg and their envelope Ehg: (a) in space of surface parameters and (b) on hob surface

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Figure 5

Contact lines Lhg in space of surface parameter in the case of N1=7 and γ=85deg

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Figure 6

Contact lines Lhg on hob surface in the case of N1=7 and γ=85deg: (a) group A, (b) group B, and (c) group C in Fig. 5

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Figure 7

Contact lines on worm-gear surface: (a) in the case of N1=1 and crossing angle γ=90deg and (b) in case of N1=7 and crossing angle γ=85deg

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Figure 8

Schematic of disk: (a) axial section of mismatched disk and (b) applied parabola

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Figure 9

Results of TCA: (a) paths of contact for aligned and misaligned gear drives and (b) negative function of transmission errors

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Figure 10

Results of TCA for design of a worm-gear drive by application of an oversized hob without mismatch of profiles of worm- and hob-generating disks: (a) path of contact on worm-gear surface and (b) illustration of positive function of transmission errors

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