GREEN, GREENER, GREENY. AN EVOLUTION OF GREENY TO A SAFER, MORE STABLE AND MORE CONFORTABLE ELECTRIC TRICYCLE

This paper is a presentation of Greeny 's evolution over the design phases. The study started with an analysis of the existing products on the market, the requirements for such vehicles and the applied legislation in this case. There were mainly 3 versions of Greeny: V1.0, V2.0, V3.0. Each version brings optimisation in terms of autonomy, stability and ergonomics. The goal is to obtain a cost-effective product using mostly prefabricated parts having a high degree of recyclability. The evolution of different subassemblies (Handlebar, Fork, Folding System, Tilting System, The Hull, Rear Axle) is presented in this paper. Materials used for Greeny are also presented since we tried to lower the weight of the vehicle which influences its autonomy. For better damping, we have chosen for V2.0 and V3.0 a different type of fork which lead us to a change on the folding system that also is easier to be handled. The handlebar was changed to improve ergonomics and the safety of the passenger. It is also easier to be set to height. The safety of the passenger was considered also when the tilting system was changed. This change also brings a better posture on the vehicle. The hull design was decided by the position of the batteries that was changed to improve stability and ergonomics. A better feet position was obtained changing the design of the rear axle.