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Technical Briefs

High-Performance Linear Cable Transmission

[+] Author and Article Information
Joan Savall1

 CEIT, Manuel de Lardizábal 15, 20018 San Sebastián, Spain; TECNUN, University of Navarra, Manuel de Lardizábal 13, 20018 San Sebastián, Spainjsavall@ceit.es

Javier Martín

 CEIT, Manuel de Lardizábal 15 20018 San Sebastián, Spainjmamezaga@ceit.es

Alejo Avello

 CEIT, Manuel de Lardizábal 15, 20018 San Sebastián, Spain; TECNUN,  University of Navarra, Manuel de Lardizábal 13, 20018 San Sebastián, Spainalavello@ceit.es

1

Corresponding author.

J. Mech. Des 130(6), 064501 (Apr 16, 2008) (5 pages) doi:10.1115/1.2901149 History: Received February 16, 2007; Revised January 18, 2008; Published April 16, 2008

Cable transmissions offer several advantages such as high stiffness to weight ratio, high strength, low friction, and absence of backlash, which makes them appropriate for demanding mechanical applications. However, while extensively used as rotational transmissions, there are only a few examples of linear cable transmissions in the literature. The reason is that the up-to-date designs are based on a cable layout that leads to cable length changes during movement. This, in turn, produces negative effects such as transmission nonlinearity and cable fatigue. In this paper, an alternative design for linear cable transmissions is presented. The new design overcomes the aforementioned problems through a proper cable layout. Different applications of the new transmission are reported, validating the proposed design.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 9

Tightening procedure with proposed pretensioning mechanism: (a) initial pretension T0 and (b) increased pretension T0′>T0.

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Figure 10

Linear cable transmission applied to the double inverted pendulum control. (a) stabilization and (b) swing up.

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Figure 11

Large interface for aeronautics maintainability (LHIfAM)

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Figure 12

Linear cable transmission applied to the translational degree of freedom of the large haptic interface for aeronautics maintainability

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Figure 8

(a) Cable-return (b) theoretical cable return

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Figure 7

Geometrical parameters of the transmission

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Figure 6

Cable parallel to itself between any two positions of the moving part

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Figure 5

Linear cable transmission assembly with two identical pulleys on both ends of the linear path

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Figure 4

Cable trajectory for a pulley rotation: more than one-half cable turns around the pulley

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Figure 3

Different single cable-pulley layouts: (a) one-half or less cable turns around the pulley, (b) more than one-half cable turns, and (c) more than one-half cable turns around threaded pulley

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Figure 2

Working principle of cable transmissions

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Figure 1

High-performance linear cable transmission

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