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Technical Briefs

A New Concept for a Wheel-Embedded Assembly for Electric Vehicles

[+] Author and Article Information
João Pedro

e-mail: jsimoespedro@gmail.com

João Weinholtz

Research Fellow
e-mail: joao.weinholtz@sapo.pt

Luís Sousa

Assistant Professor
e-mail: lsousa@dem.ist.utl.pt

Luís Reis

Associate Professor
e-mail: luis.g.reis@ist.utl.pt
Department of Mechanical Engineering,
Instituto Superior Técnico, University of Lisbon,
Avenida Rovisco Pais 1,
Lisbon 1049-001, Portugal

Contributed by the Design for Manufacturing Committee of ASME for publication in the Journal of Mechanical Design. Manuscript received November 8, 2012; final manuscript received August 14, 2013; published online September 18, 2013. Assoc. Editor: Rikard Söderberg.

J. Mech. Des 135(12), 124502 (Sep 18, 2013) (5 pages) Paper No: MD-12-1551; doi: 10.1115/1.4025294 History: Received November 08, 2012; Revised August 14, 2013

The present research focuses on the development of a multifunctional wheel-embedded assembly for electrically powered vehicles. It must perform the core functions of a road-going vehicle—propulsion, braking, steering, and suspension—with all functional mechanical elements within the wheel envelope. The originality of the research lies in the integration of all aforementioned functions at once. The proposed concept exhibits two off-center electric motors, sliding pillar-type suspension with direct-drive steering at the top, and braking is achieved by means of a conventional disk and caliper assembly, but servohydraulically actuated with magnetically actuated parking brake. It makes extensive use of geometric nesting and function sharing—the large transmission gear doubles as hub and wheel carrier, the suspension pillar is also used for steering torque transmission. Finally, the advantages and disadvantages of the proposed concept are addressed, as well as practical applications.

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References

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Figures

Grahic Jump Location
Fig. 1

Frame and sleeve: (a) exploded view CAD model, (b) built prototype

Grahic Jump Location
Fig. 2

Hub: (a) exploded view CAD model. Built prototype front (b) and rear (c) views.

Grahic Jump Location
Fig. 3

Unsprung components. Exploded view CAD model front (a) rear (c). Built prototype front (b) rear (d).

Grahic Jump Location
Fig. 4

Sprung components. CAD model (a), (b), and (c). Built prototype (d), (e), and (f).

Grahic Jump Location
Fig. 5

Complete assembly overview. CAD model (a) and (b). Built prototype (c), (d), and (e).

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