Alberto Demenego

University of Illinois Chicago

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Daniele Vecchiato

University of Chicago

Faydor L. Litvin

University of Illinois Chicago

Robert F. Handschuh

Glenn Research Center

Qi Fan

Sichuan University

E. Karedes

Brian Hansen

University of Nevada, Reno

Salvatore Mancò

Polytechnic University of Turin

Thomas M. Sep

Visteon (United States)

John Argyris

Stuttgart Observatory

Alfonso Fuentes

Rochester Institute of Technology

Cooperative Institutions

University of Illinois Chicago

University of Chicago

Polytechnic University of Turin

Turin Polytechnic University

Northeastern University

Institut national de recherche en informatique et en automatique

Glenn Research Center

Cleveland Institute of Art

DEVCOM Army Research Laboratory

Goddard Space Flight Center

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New developments in the design and generation of gear drives

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science (2001)

Faydor L. Litvin Alfonso Fuentes Alberto Demenego Daniele Vecchiato Qi Fan

Design, generation and simulation of the meshing and contact of gear drives with favourable bearing contact and reduced noise are considered. The proposed approach is based on replacement of the instantaneous line of contact of tooth surfaces by point contact and on application of a predesigned parabolic function of transmission errors that is able to absorb linear discontinuous functions of transmission errors caused by misalignment. Basic algorithms for analysis and synthesis of gear drives are presented. The developed theory is applied for design and generation of the following gear drives with modified geometry: (a) spur and helical gears, (b) a new version of Novikov-Wildhaber (N-W) helical gears, (c) asymmetric face gear drives with a spur pinion, (d) formate-cut spiral bevel gears. Generation of the tooth surface of a worm gear is presented as the formation of a two-branch envelope. The discussed topics are illustrated with examples.

Bevel gear

Pinion

Tooth surface

Non-circular gear

Contact analysis

Spur

Cycloid gear

Envelope (radar)

10.1243/0954406011524117

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Citations (19)

Formation by branches of envelope to parametric families of surfaces and curves

Computer Methods in Applied Mechanics and Engineering (2001)

Faydor L. Litvin Alberto Demenego Daniele Vecchiato

Envelope (radar)

Family of curves

Parametric equation

10.1016/s0045-7825(00)00334-0

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Citations (34)

Design and simulation of meshing of a cycloidal pump

Mechanism and Machine Theory (2002)

Alberto Demenego Daniele Vecchiato Faydor L. Litvin Nicola Nervegna Salvatore Mancò

Instant

10.1016/s0094-114x(01)00074-x

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Citations (104)

Design of One Stage Planetary Gear Train With Improved Conditions of Load Distribution and Reduced Transmission Errors

Journal of Mechanical Design (2002)

Faydor L. Litvin Daniele Vecchiato Alberto Demenego E. Karedes Brian Hansen

The authors propose an approach for the design of one-stage planetary gear train with reduced transmission errors, localized bearing contact and improved conditions of distribution of load between the planetary gears. The planetary gear train is considered as a multi-body mechanical system of rigid bodies. The proposed approach is based: (i) on modification of geometry of gear tooth surfaces, and (ii) minimization and equalization of the backlash between the contacting gear tooth surfaces. The modification of geometry is accomplished: (i) by double-crowning of planetary gears, and (ii) by application of screw involute surfaces of the same direction of screws for the sun and the ring gears. The proposed geometry enables: (i) predesign of parabolic function of transmission errors for reduction of noise and vibration, and (ii) a simple method of regulation and equalization of the backlash between the gear tooth.

Gear train

Non-circular gear

Load distribution

Involute gear

10.1115/1.1515797

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Citations (25)

Geometry of a cycloidal pump

Computer Methods in Applied Mechanics and Engineering (2001)

Daniele Vecchiato Alberto Demenego John Argyris Faydor L. Litvin

Envelope (radar)

Parametric equation