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Developing the Folding 3-Wheeler

Developing the Folding 3-Wheeler. March 6, 2007. Background/Justification. Allow user to gain access to public transportation. Facilitate the process of transporting the user and the wheelchair safely. Goal.

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Developing the Folding 3-Wheeler

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  1. Developing the Folding 3-Wheeler March 6, 2007

  2. Background/Justification • Allow user to gain access to public transportation. • Facilitate the process of transporting the user and the wheelchair safely.

  3. Goal • To design a folding three wheeled wheelchair that has the kinematic advantages of a 3-wheeler, but the portability of a folding 4-wheeler.

  4. Original Functional Requirements • Fold compactly when not in use • Be comfortable and ergonomic • Light enough so the user can carry it

  5. But then…

  6. Primary Functional Requirements • Ability to fold compactly • Made from cheap and available materials • Easy to manufacture • Sturdy

  7. Design Parameters

  8. Cheap and Available Materials • Design constraints • Joints must be prismatic or revolute. • Use of only 25mm pipe. • 26” wheels. • Limited tool set. • Design Freedoms • Use of bike parts

  9. Easy to Manufacture • Timeline to completion: 3 days • Can extend production time to 4 days. • Cost vs. Benefit

  10. Sturdy • Sacrifice portability for rigidity?

  11. Current Brainstorming/ Strategies

  12. Countermeasures • Modularity • Easily detachable features • “snap together” • Only uses one “extra” tool

  13. Questions?

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