1 / 30

Off-Road Wheelchair Project for Outdoor Mobility Solutions

Join our team as we design a safe off-road wheelchair for outdoor enthusiasts. Detailed engineering analysis, lightweight design, and easy assembly instructions. Delivered with client satisfaction in mind.

fmacon
Download Presentation

Off-Road Wheelchair Project for Outdoor Mobility Solutions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Design Review Off-Road Wheelchair Project

  2. Mobility Solutions Team • Scott Turnbull - Team Leader • Brett Bonner - Assistant Team Leader • Roy La Barbera – Treasurer • Joey Speigl – Communications • Dr. John Tester - Advisor Our Clients • Carol Seumptewa • Toni Seumptewa

  3. Problem Statement • Clients enjoy the outdoors • Current wheelchair unsuitable • Past search was unsuccessful Our objective is to design and build a safe and reliable off-road wheelchair.

  4. Deliverables • A customized off-road wheelchair • Design • Drawings • Assembly instructions • Engineering Analysis

  5. Functional Requirements • Safely, Easily Traverse Dirt Trails • Facilitates Passenger Pivot Transfers • Comfortable, Upright Seating Position • Passenger Restraint System • Braking System • Low Maintenance • Lightweight and Fit Into Client’s Truck

  6. Wheelchair Experience Quickie 2 Special Needs Baby Jogger

  7. Off-Road Wheelchair Models Quickie XTR Natural Access De-Bug

  8. Available Accessories Wheel Rims Quick Release Hubs Castors Seating Upholstery Mountain Bike Tires

  9. Safety and Stability Overall Convenience Cost Design Philosophy: What drives the design?

  10. Design Method • Modeling

  11. Wheel Sizes

  12. Design Evolution Design #1 Features: • Folding X-Member • Swinging Arms w/ Castors • 26’’ Rear Tire • 12’’ Front Castor Problems: • Too many moving parts • Questionable reliability

  13. Design Evolution Design #2 Features: • Folding X-Member • 16’’ Rear Castors • 16’’ Front Tires Problems: • Rear Castors • Steering Difficulty • Curb Navigation • Difficulty Collapsing

  14. Design Evolution Design #3 = Frozen Design Features: • Seatback Folds • Elevated Footrest • 20’’ Rear Tires • 12’’ Front Castors • Quick Release rear tires

  15. Design Evolution Moving Stationary for Transfers

  16. Design Evolution Castor Wheel Wheelchair Folded

  17. Frame Material - Aluminum 5052 • Corrosion Resistant • Weldability • Availability • High Strength-Weight Ratio • Tinius Olsen Tension Test • Su = 24,000 psi • Sy = 16,000 psi

  18. Determining Design Load • Static Load = 150 lbs • Shock Load • Worst Case Amplification Factor = 2 • Results in 300 lbs Dynamic Load

  19. FEM - Loads and Displacements

  20. FEM – Max Stress

  21. FEM – Deflection and Contour Stress F.S. = 2.8 s’ = 5,700 psi Points of Max Stress

  22. Fatigue Analysis • Sf = 16,000 psi (500 million cycles) • F.S. = 2.8 • Weight Estimate • 20 – 30 lbs • Stability Analysis • 25 Degree Slopes

  23. Schedule Followed

  24. Where We Are Behind Schedule • Approximately 1.5 Weeks Behind • Locating Vendors (Mostly Complete) • Order Ready-Made Parts • Weld Frame • Use of Time and Manpower • Assigned Design and Analysis Tasks • Manufacturing Tasks To Be Assigned

  25. Spring Semester Team Timesheet Week Hours 1 20.3 2 50.6 3 36.1 4 45.7 5 71.0 6 36.8 7 51.7 8 22.0 Total 334.2 Weekly Avg: 41.8

  26. Bill of Materials and Cost Estimate

  27. Fundraising • ASNAU - $360 • DDD - $300 • Doney Park Water - $700 • Cost Tracking • CET Account Setup • Receipts to Treasurer and Reimbursement • Notify Client to Write Check

  28. Summary • Design Finalized • Ready to Begin Manufacturing • Funds are in Place • Wheelchair Delivered May 2

  29. Questions?

More Related