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Research Papers

Feasible Geometrical Configurations for Split Torque Gearboxes With Idler Pinions

[+] Author and Article Information
José A. Vilán Vilán

Area of Mechanical Engineering, Superior Technical School of Industrial Engineers, University of Vigo, 36310 Vigo, Spainjvilan@uvigo.es

Abraham Segade Robleda1

Area of Mechanical Engineering, Superior Technical School of Industrial Engineers, University of Vigo, 36310 Vigo, Spainasegade@uvigo.es

Marcos López Lago

Area of Mechanical Engineering, Superior Technical School of Industrial Engineers, University of Vigo, 36310 Vigo, Spainmllago@uvigo.es

Enrique Casarejos Ruiz

Area of Mechanical Engineering, Superior Technical School of Industrial Engineers, University of Vigo, 36310 Vigo, Spaine.casarejos@uvigo.es

1

Corresponding author.

J. Mech. Des 132(12), 121011 (Dec 14, 2010) (8 pages) doi:10.1115/1.4002977 History: Received December 10, 2009; Revised November 04, 2010; Published December 14, 2010; Online December 14, 2010

The split torque gearbox is a practical solution to the transmission of high torques with the lowest possible weight. In this article, we perform the mathematics necessary to calculate possible solutions for the simultaneous meshing of four wheels on the basis of geometric conditioning factors. These calculations will be illustrated by numerical applications. Finally, particular cases of planetary gearboxes and a gearbox with equal idler pinions are studied, with the conclusion that their application is appropriate in specific conditions.

Copyright © 2010 by American Society of Mechanical Engineers
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References

Figures

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Figure 6

Representation of Eq. 9 for n=−3

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Figure 5

Nomenclature for the four-wheel case

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Figure 4

General condition for simultaneous meshing of four wheels

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Figure 3

Different meshing options for the four-wheel problem

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Figure 2

(a) Configuration of patent by Southcott (6) and (b) configuration of patent by Gmirya (7)

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Figure 1

(a) Standard gearbox, (b) gearbox with two input pinions, and (c) split torque gearbox with idler pinions

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Figure 7

Some feasible solutions for given numbers of teeth

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Figure 8

Two-plane meshing for the solution n=29

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Figure 9

Solutions for three outside wheels and one hollow wheel: (a) crossed quadrilateral and (b) noncrossed quadrilateral

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Figure 10

Representation of Eq. 9 for n=0, crossed geometry

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Figure 11

Roots of Eq. 9 for n=0, noncrossed geometry

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Figure 12

Geometry for some crossed quadrilateral −12≤n≤1 and noncrossed quadrilateral 14≤n≤18 solutions

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Figure 13

Idler pinions in an outside gear

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Figure 14

Planetary gear with nonequispaced planet wheels

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Figure 15

Planetary gear with equispaced planet wheels

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