Pulley Back Car

thingiverse

Ideation for this design started with a mind map where my mind freely bounced from idea to idea, unearthing main concepts I could potentially develop into an enjoyable and educational toy, which turned out to be pulleys and motion. As I brainstormed possible ways to incorporate these ideas into a 3D printable toy car, traditional pull-back cars that brought me joy as a child inspired me to create one using pulleys and tension for propulsion. After printing, I encountered some necessary adjustments, including shaving of the slide bars to ensure smooth operation. To achieve this, low-friction line was essential; fishing line proved to be an excellent option, which needed to be strung through holes and tied off at the smallest printed part. Limited print size dictated that a drop of super glue would need to bind the slide bars securely once they were snapped together. Two pencils sharpened on both ends served as ideal axles for the toy car's wheels. Pencil wheel caps fit snugly onto these axle-ends, whereupon they sat firmly with their accompanying wheels secured on the toy car's chassis. A couple of drops of super glue into each wheel hole ensured further stability by bonding the wheels to their respective axles. To finish the pull-back capabilities, push pins had to be pressed through holes on both ends of the pencil axles protruding from the rear of the toy car.