Up-Down Wheelchair 2.009 Silver A Design Specifications - - PowerPoint PPT Presentation
Up-Down Wheelchair 2.009 Silver A Design Specifications Requirements Attributes Specifications Reach Lift System Seat height 9-33 Wheel brakes, Handles 100kg Sliding bearings without tipping Safety and stability Weight Hydraulic jack 1500N
Requirements Attributes Specifications Reach Lift System Seat height 9-33” Safety and stability Wheel brakes, Sliding bearings Handles 100kg without tipping Weight Hydraulic jack 1500N force output Standard mobility Modified chassis Meets all ASA requirements
¡ Hydraulic System
l Easy to lift 24” l Compactness l Optimal system
¡ Stability
l Smooth vertical motion l Torsional strength
¡ Cost
l Manual Chair ~ $150 l Electric Lift Chair ~ $3000
¡ Modify wheelchair structure ¡ Decouple and modify jacks ¡ Stabilize chair ¡ Integrate components Bottle Jack Guided seat
¡ Hydraulics:
l Cheap, and work well l Complex to assemble; highly sensitive
¡ Stability
l Slider bearings l Torsional links
¡ Ergonomics
l Jack placement: handle and scissors l Seat Angle
¡ Technically feasible ¡ Cost effective
¡ Design for cheap Decoupled Auto
Jack
Scissor jack for vertical and forward stability Sliding Bearings for lateral stability
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
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