cross slope compensation for wheelchairs david dar marc c. moore alexander a. abraham advisor: dr....
DESCRIPTION
Design Criteria Add-on feature to current wheelchairs Cost-friendly Aesthetically appealing Light-weight Mechanically simple Robust, durableTRANSCRIPT
![Page 1: Cross Slope Compensation for Wheelchairs David Dar Marc C. Moore Alexander A. Abraham Advisor: Dr. Mark Richter](https://reader034.vdocument.in/reader034/viewer/2022051007/5a4d1afd7f8b9ab059985317/html5/thumbnails/1.jpg)
Cross Slope Compensation for
WheelchairsDavid Dar
Marc C. MooreAlexander A. Abraham
Advisor: Dr. Mark Richter
![Page 2: Cross Slope Compensation for Wheelchairs David Dar Marc C. Moore Alexander A. Abraham Advisor: Dr. Mark Richter](https://reader034.vdocument.in/reader034/viewer/2022051007/5a4d1afd7f8b9ab059985317/html5/thumbnails/2.jpg)
The Problem Currently wheelchairs do not have a
mechanism to prevent involuntary veering on cross-slopes
Subjects are forced to apply more torque on one wheel to maintain straightforward motion
![Page 3: Cross Slope Compensation for Wheelchairs David Dar Marc C. Moore Alexander A. Abraham Advisor: Dr. Mark Richter](https://reader034.vdocument.in/reader034/viewer/2022051007/5a4d1afd7f8b9ab059985317/html5/thumbnails/3.jpg)
Design Criteria Add-on feature to current wheelchairs Cost-friendly Aesthetically appealing Light-weight Mechanically simple Robust, durable
![Page 4: Cross Slope Compensation for Wheelchairs David Dar Marc C. Moore Alexander A. Abraham Advisor: Dr. Mark Richter](https://reader034.vdocument.in/reader034/viewer/2022051007/5a4d1afd7f8b9ab059985317/html5/thumbnails/4.jpg)
The Solution A mechanism that restricts rotational
movement of a front wheel Forces wheelchair to travel in a single direction
without deviation Applied only when the subject deems it
necessary
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Our Design Preliminary model of
the caster wheel Caster features two
surfaces separated by ball bearings
Upper contingent smaller than lower contingent
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Our Design Ring with teeth along the
radial and axial axes, which surrounds central post
By default, the spring-loaded ring is suspended above the lower surface
When activated, ring snaps down and locks with lower plate
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Concerns Solves problem Mechanism inadvertently activating Reliability - Mean Time Between Failure
(MTBF) Ease of use Warning of hazards
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Work Completed Researched ADA regulations Researched wheelchair mechanics (lab visits,
journal publications, etc.) Constructed initial 3-D model Consulted several times with Dr. Mark Richter
(Vanderbilt University, MAX-Mobility) Submitted NCIIA proposal Established project website
![Page 9: Cross Slope Compensation for Wheelchairs David Dar Marc C. Moore Alexander A. Abraham Advisor: Dr. Mark Richter](https://reader034.vdocument.in/reader034/viewer/2022051007/5a4d1afd7f8b9ab059985317/html5/thumbnails/9.jpg)
Current Work Increasing proficiency with Pro Engineer Forming basic caster model with the CAD
program Using established manufactured caster
designs as samples
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Future Work Complete CAD model Manufacture prototype from finished CAD
model Analyze design effectiveness Re-design model and make adjustments
accordingly Implement device alterations