Personal Mobility Lift 2006-2007 Capstone Team Members: Jim Folgate Bill Beers Ryan Pelton David Zuercher.

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Presentation transcript:

Personal Mobility Lift Capstone Team Members: Jim Folgate Bill Beers Ryan Pelton David Zuercher

Introduction PDS Concept Selection Design Selections AnalysisFabricationVerificationAdditions

Product Design Specifications Mission Statement: This project requires the team to design and build a small functional device that will lift a person from the floor (2”) to the height of a wheelchair or walker (24”- 30”.) The device will be firmly mounted to a wall, and be powered by the person being lifted. This product will be designed for anyone requiring the additional mobility afforded by such a device.

High Priority Requirements Lifting Range Lowers Easily and Safely Human Powered Secure Mounting Ergonomic/Comfort Maintenance Free Long Wearing Finish Cost

Concept Selection WeightHand winch Hydraulic ScissorRatchet Performance3252 Ergonomics2333 Quality/Reliability3445 Safety3343 Aesthetics1244 Cost2423 Totals435346

Detail Design Decisions Bottle Jack –Inexpensive $10 –Functional –Lifting Power –Built in features Pump Release valve

Scissor Lift –Number of Linkages –Lengths –Beam analysis Fasteners –Diameters selected for strength –Lengths selected based on design geometry

Bushing Blocks –Bronze Bushing –Steel mounting Guide Rods –Solid Steel Shafts –Precision machined

Frame –3/16” A36 Steel –Doubles as the housing for the lifting device, and a supportive back for the chair Pump Handle –Steel pipe with bungee cord

Powder Coat

Analysis FEA analysis of frame Beam Analysis for the Scissor members Lateral Forces on the Guide rods Fastener Shearing Analysis

Fabrication at Warn Industries

Assembly

Verification Lifting Range –Lifts from 1/2” to 28” Human Powered –Check Secure Mounting –Mounted to wall studs and flooring Ergonomics –Smooth pumping action –Pillow-top seat (add-on) Lowers easily and safely –Controlled by the release valve of the jack Long wearing finish –Powder Coat Maintenance Free –No required maintenanceCost –Final Prototype Cost $165 Lifting Capacity –PDS requirement not met

New Additions Some unpredicted motion of the chair has cause the team to redesign and add a guide block and bearings to the design. The bearings will be attached to the centerline of bolts on the scissor members and will ride up a vertical block to stabilize the vertical motion of the lift.

Questions