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Published on Dec 20, 2009
We describe a robotic car capable of changing its wheels automatically. The robot consists of 2 main parts: the car itself and an arm placed above the car, which will change the broken wheel. The car is constructed from a Lego NXT kit, while the arm is a standard Lynx arm with 6 degrees of freedom. The difficulty consists in assembling the wheel on its shaft with a high precision which is not possible with the Lego components. In order to solve this problem we propose a more complex device. Instead of changing the wheel, we change an ensemble composed from wheel and its axel. We also design a mechanism where the wheel and its axel can be inserted without needing a high precision.