up-down wheelchair 2.009 silver a. design specifications requirementsattributesspecifications...
TRANSCRIPT
![Page 1: Up-Down Wheelchair 2.009 Silver A. Design Specifications RequirementsAttributesSpecifications ReachLift SystemSeat height 9-33” Safety and stability Wheel](https://reader036.vdocuments.us/reader036/viewer/2022062409/5697c0201a28abf838cd275e/html5/thumbnails/1.jpg)
Up-Down Wheelchair2.009 Silver A
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Design Specifications
Requirements Attributes Specifications
Reach Lift System Seat height 9-33”
Safety and stabilityWheel brakes,
Sliding bearingsHandles 100kg
without tipping
Weight Hydraulic jack 1500N force output
Standard mobility Modified chassisMeets all ASA
requirements
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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
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Design Process
Modify wheelchair structure Decouple and modify jacks Stabilize chair Integrate components
Bottle Jack Guided seat
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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
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Conclusions
Technically feasible Cost effective
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Thank You
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POST PRESENTATION MATERIAL
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Hydraulic Design Evolution
Design for cheap Decoupled Auto Jack
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Stability Solution
Scissor jack for
vertical and forward stability
Sliding Bearings for lateral stability
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Cost
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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The Hydraulics
1Sarcopenia: As We Age Muscle Loss Occurs, Ezine Articles
<http://ezinearticles.com/?Sarcopenia:-As-We-Age-Muscle-Loss-Occurs&id=297128>
Drive Piston
One Way Check Valves
Response Piston
Manual operation Pressure Release
Reservoir
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Pressure Drive