developing the folding 3 wheeler
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Developing the Folding 3-Wheeler - PowerPoint PPT Presentation


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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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Presentation Transcript
background justification
Background/Justification
  • Allow user to gain access to public transportation.
  • Facilitate the process of transporting the user and the wheelchair safely.
slide3
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.
original functional requirements
Original Functional Requirements
  • Fold compactly when not in use
  • Be comfortable and ergonomic
  • Light enough so the user can carry it
primary functional requirements
Primary Functional Requirements
  • Ability to fold compactly
  • Made from cheap and available materials
  • Easy to manufacture
  • Sturdy
cheap and available materials
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
easy to manufacture
Easy to Manufacture
  • Timeline to completion: 3 days
    • Can extend production time to 4 days.
  • Cost vs. Benefit
sturdy
Sturdy
  • Sacrifice portability for rigidity?
countermeasures
Countermeasures
  • Modularity
    • Easily detachable features
    • “snap together”
    • Only uses one “extra” tool
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