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Open AccessArticle

Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles

Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Machines 2019, 7(3), 55; https://doi.org/10.3390/machines7030055
Received: 18 July 2019 / Revised: 27 August 2019 / Accepted: 29 August 2019 / Published: 1 September 2019
In this article, the design and implementation of an electronic bicycle gear-shift with moving cassette is presented. The niche context where the needs developed is explained and the project evolution over two versions is described. Technical aspects considered in the design phase are discussed and detailed explanations of hardware layout and control software logic are given. Performance of the two implemented versions are compared through data recorded during the target competition (pedaling cadence and torque), highlighting the higher reliability of the second design thanks to mechanical simplification and a more stable position feedback. An additional comparison with cadence data from other competitors in a speed-challenge competition is then presented to highlights the main benefit obtained: a reduced variance in cadence that enables the rider to pedal at his optimal rate since the early stage and through the whole run-up. Finally, the current development of the project under a Proof of Concept grant is presented by discussing its potential application on the standard bicycle market, the need for an assessment of its value proposition and the main obstacles to overcome for complying (or not) with the current market standards. The article offers an overview of practical aspects to be considered when designing high-speed human powered vehicle transmissions, including technical details of an innovative solution and critical considerations about the possibility of such a specific design to develop within the standard bicycle market. View Full-Text
Keywords: bicycle transmission; gear-shifting control; shifting mechanism; multi-speed bicycle; human powered vehicles; mechanical design; innovation bicycle transmission; gear-shifting control; shifting mechanism; multi-speed bicycle; human powered vehicles; mechanical design; innovation
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MDPI and ACS Style

Baldissera, P.; Delprete, C.; Zahar, A. Design and Construction of a Moving Cassette Electronic Gear-Shift for Human Powered Vehicles. Machines 2019, 7, 55.

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