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Trends in the Development of Machinery and Associated Technology ” TMT 2009 , Hammamet , Tunisia , 16-21 October 2009 DEVELOPMENT AND PRODUCTION OF STEERING MECHANISM FOR THREE WHEEL VEHICLES

Development of a steering mechanism in a human powered vehicle (HPV – Fig. 1.) [1, 2] with two steering wheels tackles two major issues: the lack of space to accommodate steering rods between front wheels, and conditions that occur while the vehicle is driving along a curve. The second are analytically described by the function of the wheel turn depending on an optional radius of the curve. The constructional solution [3] is based upon two rope-wheels with variable radii and Bowden cables. Unlike the Ackerman’s mechanism, presented solution enables the optimal travel of both wheels through a curve. To prove the practical aspects of the mechanism several working prototypes were produced using various rapid prototyping and tooling techniques from three-dimensional printing to investment casting of aluminum working parts.