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Up-Down Wheelchair

Up-Down Wheelchair. 2.009 Silver A. Design Specifications. Critical Issues and Solutions. Hydraulic System Easy to lift 24” Compactness Optimal system Stability Smooth vertical motion Torsional strength Cost Manual Chair ~ $150 Electric Lift Chair ~ $3000. Design Process.

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Up-Down Wheelchair

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  1. Up-Down Wheelchair 2.009 Silver A

  2. Design Specifications

  3. Critical Issues and Solutions • Hydraulic System • Easy to lift 24” • Compactness • Optimal system • Stability • Smooth vertical motion • Torsional strength • Cost • Manual Chair ~ $150 • Electric Lift Chair ~ $3000

  4. Design Process • Modify wheelchair structure • Decouple and modify jacks • Stabilize chair • Integrate components Bottle Jack Guided seat

  5. Lessons from Model • Hydraulics: • Cheap, and work well • Complex to assemble; highly sensitive • Stability • Slider bearings • Torsional links • Ergonomics • Jack placement: handle and scissors • Seat Angle

  6. Conclusions • Technically feasible • Cost effective

  7. Thank You

  8. POST PRESENTATION MATERIAL

  9. Hydraulic Design Evolution • Design for cheap Decoupled Auto Jack

  10. Stability Solution Scissor jack for vertical and forward stability Sliding Bearings for lateral stability

  11. Fabrication Cost: <$300 Wheelchair Manufacturing < $150 Hydraulics Manufacturing < $50 Bearings < $50 Assembly < $50 Customer Demand: $500 Typical Wheelchair ~$200 Chiropractors and Doctors dealing with temporary injuries Libraries and stores desiring extra handicapped accessibility 80% Covered by Medicare for individual users Cost

  12. The Hydraulics Drive Piston Response Piston One Way Check Valves Manual operation Pressure Release Reservoir 1Sarcopenia: As We Age Muscle Loss Occurs, Ezine Articles <http://ezinearticles.com/?Sarcopenia:-As-We-Age-Muscle-Loss-Occurs&id=297128>

  13. Pressure Drive

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