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Hybrid Wheelchair Created By: ETM 498 Senior Project Fall 2008 ETM 498 Mechanical Engineering Technology (Senior Project) ...
“ The story behind our project” ETM 498 Mechanical Engineering Technology (Senior Project) Figure 2: Peter Ladd
<ul><li>Topics Presented By: </li></ul><ul><ul><li>Concept Development……………………….Sean Kelleher </li></ul></ul><ul><ul><li>D...
Concept Development Process ETM 498 Mechanical Engineering Technology (Senior Project) Examine existing ski, water and sno...
I: Custom Wheel Chair Designs ETM 498 Mechanical Engineering Technology (Senior Project) <ul><li>Recreational Equipment fo...
I: Custom Wheel Chair Design Goals in Order of Priority <ul><li>Maneuverability </li></ul><ul><li>Light weight </li></ul><...
II: Design Candidates <ul><li>3-ski sled </li></ul><ul><li>Modified wheelchair </li></ul><ul><li>Modified mountain bike se...
III: Initial Designs  ETM 498 Mechanical Engineering Technology (Senior Project) Figure 7: By Rob D.  Figure 8: By Sean K....
IV: Final Frame Design <ul><li>Combination of Ideas :  </li></ul><ul><li>Rob  </li></ul><ul><li>Sean </li></ul><ul><li>Ore...
Detailed Design ETM 498 Mechanical Engineering Technology (Senior Project) Figure 11: Adjustments, Ski mounts, Knee Brace ...
Parts Integration outline  <ul><li>   </li></ul><ul><li>Researched cerebral palsy to determine wheelchair requirements. Ex...
ETM 498 Mechanical Engineering Technology (Senior Project) Table 1: Total Parts use COMPONENT TOTAL COST COMPONENT TOTAL C...
Bill of Material Development  ETM 498 Mechanical Engineering Technology (Senior Project) Table 2: Total Parts purchase COM...
Analysis     Figure 14:  Experimentation View Table 3: Input Dimensions Table 4: Stability Study Results ETM 498 Mechanica...
Analysis    ETM 498 Mechanical Engineering Technology (Senior Project) Figure 15:  Experimentation View <ul><li>Stability ...
  ETM 498 Mechanical Engineering Technology (Senior Project) Maximum Displacement Analysis:  Figure 16: Seat Frame Displac...
  ETM 498 Mechanical Engineering Technology (Senior Project) Maximum Principal Stress Analysis:  Figure 17: Seat Frame Max...
Purchased Chair vs. Hybrid Wheelchair  ETM 498 Mechanical Engineering Technology (Senior Project) Figure 18: Peter’s Curre...
Manufacturing Summary  <ul><li>Report summary:  </li></ul><ul><li>about 30 parts to manufacture </li></ul><ul><ul><li>Lowe...
Manufacturing <ul><li>Integration of existing supports were fabricated into the hybrid wheel chair.  </li></ul><ul><li>Wei...
ETM 498 Mechanical Engineering Technology (Senior Project) Figure 22: E-Z Lock System Figure 23: Front Wheel Assembly Figu...
Assembly / Testing and Development ETM 498 Mechanical Engineering Technology (Senior Project)
Final Prototype ETM 498 Mechanical Engineering Technology (Senior Project) Table:  Purple -  Components of the shelf.  RED...
Conclusion   <ul><li>What challenges the team faced? </li></ul><ul><li>Advantages of the  Hybrid Wheelchair  ?  </li></ul>...
 
Works Cited <ul><li>www.globalspec.com/local/4352/CT  </li></ul><ul><li>www.manta.com </li></ul><ul><li>www.freedommotors....
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Final Presentation

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  • Mono or duo skis: for snow or water -Snow mono skis/duo skis are set up with a shock to absorb the bumps on a mountain. People without the need for a wheel chair have their legs to absorb the uneven terrain that is encountered on a mountain. Wheel chairs for sports like track and basketball are lighter, slimmer, and tailored for the specific recreation: -Basketball wheel chairs come with anti-tip bars, high performance wheels, adjustable center of gravity, and only weight around 15 lbs. -Track wheel chairs come with high performance wheels, brakes, fully welded aluminum frames, and steering. Off-road wheel chairs: -Are lightweight and super-strong, knobby tires with quick release.
  • Maneuverability: Mobile at home, fit through 28” doorway, be able to push on skis through snow. Wheel chair should be easy to steer while on wheels and on snowboards. Therefore steering is in the rear to be able to control the snowboards. Light Weight: The mother should be able to push the wheel chair through snow up a sight grade with ease. Brakes always on: The wheelchair should not be able to roll when no one is around to push it. E-Z lock system: The chair needs to be able to travel in the family van and be secure in case of an accident. Short wheel base: To be able to make sharper turns (decrease turning radius). Able to convert to sled with minimal effort: Mother must be able to do this alone Offer same support as existing chair: Peter must be as secure and stable as the existing wheel chair while also as comfortable. Chair should be adjustable. Use as many off the shelf parts as possible: These parts are already designed for safety and security while in use on a wheel chair. Decreases design and manufacturing time. Steering:
  • 3-ski sled / Dr. Gates: Mtn. bike fork in rear with single tire and two wheels in front. They detach to allow skis to attach. Modified wheelchair / Orelvis: Take an existing chair and apply design changes to meet design goals. Modified mtn. bike seat shock / Sean: Offers suspension for the seat to absorb bumps. Modified mono ski: Take a mono ski and apply design changes to meet design goals. 4-bar link (swing arm) / Rob: offers suspension for the seat to absorb bumps.
  • Designs were presented and defended Robs design: Pros: 4-bar link suspension, shorter and fatter skis, slim Cons: Heavy, complicated ski attachment and steering design Seans design: Pros: 4-bar link system, wheels roll onto skis, slim Cons: Front wheels are attached to casters, heavy Orelvis’ design: Pros: wheelchair easily rolls onto skis, easy to apply design changes Cons: can’t steer, heavy Dr. Gates Design: Pros: simple, light, steering in rear Cons: unstable in rear, difficult to convert to sled
  • Final design is a light weight triangular frame with no suspension to save weight. Steering is in the rear using parts from a mountain bike fork and handle bars. The wheels roll onto the snowboards and fit into channels with quick release pins to hold them on place. The bottom seat is adjustable up and down. The back rest is adjustable forward and back. Most potential for maneuverability Simple design Easy access from front Etc add more
  • Transcript of "Final Presentation"

    1. 1. Hybrid Wheelchair Created By: ETM 498 Senior Project Fall 2008 ETM 498 Mechanical Engineering Technology (Senior Project) Figure 1: Final Design
    2. 2. “ The story behind our project” ETM 498 Mechanical Engineering Technology (Senior Project) Figure 2: Peter Ladd
    3. 3. <ul><li>Topics Presented By: </li></ul><ul><ul><li>Concept Development……………………….Sean Kelleher </li></ul></ul><ul><ul><li>Detailed Design………………………………….Sean Kelleher </li></ul></ul><ul><ul><li>Parts Integration………………………………..Adam Senatro </li></ul></ul><ul><ul><li>Bill of Material Development……………..Adam Senatro </li></ul></ul><ul><ul><li>Analysis………………………………………………Mazami Boroze </li></ul></ul><ul><ul><li>Manufacturing ……………………………………John Juarez </li></ul></ul><ul><ul><li>Assembly /Testing and Development…. John Juarez </li></ul></ul><ul><ul><li>Conclusion ………………………………………….Tomasz Duda </li></ul></ul>ETM 498 Mechanical Engineering Technology (Senior Project) ETM 498- members. Brian Downd, Chris Boatney, Edwin Martinez, Mustafa Telawi,Lucas Senorowsui, Orelvis Migenes, Lidia Cabello, Wojiech Piechota, Rob Drechsler , Amin G
    4. 4. Concept Development Process ETM 498 Mechanical Engineering Technology (Senior Project) Examine existing ski, water and snow, devices for people with disabilities and review with class Examine existing custom wheel chairs Determine Design Goals Select 6 candidate designs Students present and defend the designs, evaluate and select 2 or 3 Defend final designs and determine the best design based on the design goals I I I III IV
    5. 5. I: Custom Wheel Chair Designs ETM 498 Mechanical Engineering Technology (Senior Project) <ul><li>Recreational Equipment for the Disabled : </li></ul><ul><li>Mono or Dual Skis </li></ul><ul><li>Wheel Chair Basketball </li></ul><ul><li>Wheel Chair Track </li></ul><ul><li>Extreme Wheel Chair Sports </li></ul>Figure 4: Mono Snow-Ski Figure 3: Mono Water-ski Figure 6: Extreme Wheelchair Figure 5: Racing Chair
    6. 6. I: Custom Wheel Chair Design Goals in Order of Priority <ul><li>Maneuverability </li></ul><ul><li>Light weight </li></ul><ul><li>Brakes always on when not moving </li></ul><ul><li>Incorporate E-Z Lock system </li></ul><ul><li>Short wheel base </li></ul><ul><li>Able to convert into a sled, with minimal effort </li></ul><ul><li>Offer same support as existing chair </li></ul><ul><li>Use as many off the shelf parts as possible </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project)
    7. 7. II: Design Candidates <ul><li>3-ski sled </li></ul><ul><li>Modified wheelchair </li></ul><ul><li>Modified mountain bike seat shock </li></ul><ul><li>Modified mono ski </li></ul><ul><li>4-bar link (swing arm) </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project)
    8. 8. III: Initial Designs ETM 498 Mechanical Engineering Technology (Senior Project) Figure 7: By Rob D. Figure 8: By Sean K. Figure 9: Orelvis M . Figure 10: Dr. Gates
    9. 9. IV: Final Frame Design <ul><li>Combination of Ideas : </li></ul><ul><li>Rob </li></ul><ul><li>Sean </li></ul><ul><li>Orelvis </li></ul><ul><li>Dr. Gates. </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project) Figure 1: Final Design
    10. 10. Detailed Design ETM 498 Mechanical Engineering Technology (Senior Project) Figure 11: Adjustments, Ski mounts, Knee Brace Figure 12: Arm rests, Adjustments, Axles Figure 13: Chair frame, Seat frame
    11. 11. Parts Integration outline <ul><li>   </li></ul><ul><li>Researched cerebral palsy to determine wheelchair requirements. Example: seat adjustments, Easy-lock </li></ul><ul><li>Used pictures of Peter’s current wheelchair to determine attachments required </li></ul><ul><ul><li>Example: leg rest, headrest, knee brace. </li></ul></ul><ul><li>Determine wheelchair parts. </li></ul><ul><li>Worked closely with design and manufacturing to determine parts or additional information needed. </li></ul><ul><li>Searched for parts and cost. </li></ul><ul><li>Presented parts and cost for review and purchasing decision. </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project)
    12. 12. ETM 498 Mechanical Engineering Technology (Senior Project) Table 1: Total Parts use COMPONENT TOTAL COST COMPONENT TOTAL COST BOBY SUPPORT   STREARING COMPONENTS AND BRAKES   SEAT CUSHION - (USE (1) CUSHION TO MAKE KNEE BRACE) $141.40 BIKE STEERING NUT $0.00 WHEELCHAIR BACKREST CUSHION $276.75 BIKE STEERING BEARING $0.00 TRUNK SUPPORT $49.40 BRAKE LEVER $20.00 LAP BELT $14.35 BRAKE CABLE $42.00 ARMREST (SOLD IN PAIRS) $15.00 HANDLE GRIP $20.00 HEADREST $221.40 WASHER, 7/16&quot; ID $0.00 LATERAL BODY SUPPORT (SOLD IN PAIRS) $171.90 REAR WHEEL, 8&quot; X 1-1/4&quot;, 7/16&quot; BEARING X 2-3/8&quot; HUB WIDTH $58.20 FOOTREST, LEFT SIDE $48.00 SCREW, 7/16 x 3&quot; LONG, HEX HEAD $0.00 FOOTREST, RIGHT SIDE $48.00 REAR WHEEL AXLE HOUSING, ALUM. ROUND TUBE $0.00 FOOTREST STRAP (SOLD IN PAIRS) $22.75 FRONT WHEEL, 12&quot; x 1-1/4&quot;, 3/8&quot; BEARING x 2-1/2&quot; HUB WIDTH $62.00 ALUM. ROUND TUBE, 1-3/4&quot; OD x 3/16&quot; WALL x 6' LONG $25.00 STEEL ROD, 3/8&quot; DIA x 24-1/4&quot; LONG $0.00     KNOB MAIN FAME MATERIALS   EZ LOCK AND SNNOWBOARD COMPONENTS   6063 ALUM. SQUARE TUBING, 2&quot; x 2&quot; x 1/8&quot; WALL x 6' LONG $42.00 EZ-LOCK BRACKET $0.00 6063 ALUM. RECT TUBING, 1&quot; x 3&quot; x 1/8&quot; WALL x 6' LONG $86.20 EZ-LOCK BOLT, 5/8 GRADE 8 HEX BOLT 4-1/2 LONG $4.99 6063 ALUM. SQUARE TUBING, 1&quot; x 1&quot; x 1/8&quot; WALL X 6' LONG $0.00 EZ-LOCK HEX NUT $1.98 6063 ALUM. SQUARE TUBING, 3/4&quot; x 3/4&quot; x 1/8&quot; WALL x 6' LONG $0.00 SNOWBOARD, 42.5&quot; LONG $79.98 6061 ALUM. PLATE, 12&quot; x 12&quot; x 1/8&quot; THICK $0.00 ALUM. ROD, 3/4&quot; OD x 36&quot; LONG $0.00 SEAT CUSHION PLYWOOD, 24&quot; x 24&quot; x 1/4&quot; THICK $0.00 SCREW, 1/4-20 X 3/8 LG, HEX HEAD $0.00 KNEE BRACE PLYWOOD, 24&quot; x 24&quot; x 1/2&quot; THICK $0.00 SCREW, 1/4-20 X 1/2&quot; LG, HEX HEAD $0.00 BIKE STEERING COLUMN $0.00 SCREW, 1/4-20 X 1-1/2&quot; LG, HEX HEAD $0.00 BIKE STEERING FORK $0.00 NUT, 1/4-20, HEX $0.00 BIKE STEERING NECK $0.00 QUICK RELEASE PIN, 3/8&quot; DIA x 1-1/2&quot; LG $5.22 ALUM. ROUND TUBE, 3/4&quot; OD x .065&quot; WALL x 36&quot; LONG $0.00 QUICK RELEASE PIN, 3/8&quot; DIA x 2&quot; LG $15.20 ALUM. ROUND TUBE, 1&quot; OD x 1/4&quot; WALL x 36&quot; LONG $0.00     STEEL TUBING, 1&quot; OD x 1/16&quot; WALL x 6' LONG $0.00    
    13. 13. Bill of Material Development ETM 498 Mechanical Engineering Technology (Senior Project) Table 2: Total Parts purchase COMPONENT VENDOR TOTAL COST SEAT CUSHION - (USE (1) CUSHION TO MAKE KNEE BRACE) EDMOND WHEELCHAIR REPAIR & SUPPLY $141.40 WHEELCHAIR BACKREST CUSHION EDMOND WHEELCHAIR REPAIR & SUPPLY $276.75 TRUNK SUPPORT EDMOND WHEELCHAIR REPAIR & SUPPLY $49.40 LAP BELT EDMOND WHEELCHAIR REPAIR & SUPPLY $14.35 ARMREST (SOLD IN PAIRS) EDMOND WHEELCHAIR REPAIR & SUPPLY $15.00 HEADREST EDMOND WHEELCHAIR REPAIR & SUPPLY $221.40 LATERAL BODY SUPPORT (SOLD IN PAIRS) EDMOND WHEELCHAIR REPAIR & SUPPLY $171.90 FOOTREST, LEFT SIDE EDMOND WHEELCHAIR REPAIR & SUPPLY $48.00 FOOTREST, RIGHT SIDE EDMOND WHEELCHAIR REPAIR & SUPPLY $48.00 FOOTREST STRAP (SOLD IN PAIRS) EDMOND WHEELCHAIR REPAIR & SUPPLY $22.75 BRAKE LEVER NEWINGTON BIKE SHOP $20.00 BRAKE CABLE NEWINGTON BIKE SHOP $42.00 HANDLE GRIP NEWINGTON BIKE SHOP $20.00 REAR WHEEL, 8&quot; X 1-1/4&quot;, 7/16&quot; BEARING X 2-3/8&quot; HUB WIDTH EDMOND WHEELCHAIR REPAIR & SUPPLY $58.20 FRONT WHEEL, 12&quot; x 1-1/4&quot;, 3/8&quot; BEARING x 2-1/2&quot; HUB WIDTH RENAISSANCE CYCLERY $62.00 SNOWBOARD, 42.5&quot; LONG DICK'S SPORTING GOODS $79.98 QUICK RELEASE PIN, 3/8&quot; DIA x 1-1/2&quot; LG McMASTER CARR $5.22 QUICK RELEASE PIN, 3/8&quot; DIA x 2&quot; LG McMASTER CARR $15.20 TOTAL COST $1,311.55
    14. 14. Analysis Figure 14: Experimentation View Table 3: Input Dimensions Table 4: Stability Study Results ETM 498 Mechanical Engineering Technology (Senior Project) Table1 Input Dimensions Table2 Stability Study Results h (in) (-)z-mv (in) (-) Rcy (lb) 0 17.34 0.0125 1 16.32 0.0114 2 15.29 0.0015 3 14.26 0.0120 4 13.21 0.0160 5 12.13 0.0066 6 11.03 0.0154 7 9.88 0.0007 8 8.70 0.0170 9 7.45 0.0092 10 6.13 0.0014 11 4.73 0.0044 12 3.22 0.0006 13 1.59 0.0160 13.89 0.00 0.0271 Entities Dimensions (in) Lab 20 Lac 24 Cgy 20 Cgz 14 Dy 39 Dz 30 ED (width of bar) 22
    15. 15. Analysis ETM 498 Mechanical Engineering Technology (Senior Project) Figure 15: Experimentation View <ul><li>Stability Study Results Explanation </li></ul><ul><li>Table 2 shows stability analysis results based on input information gathered in table1; based on dimensions from final design. </li></ul><ul><li>In the result table, the values of (h) represent arbitrary levels/heights, ( (-) z-mv) values represent the corresponding movement of the user in (-) z direction, and ( (-) Rcy) values, the corresponding minimal reaction forces at the front wheel. </li></ul><ul><li>The results indicate the behavior of the wheelchair and its user when the pusher lifts the handle to different heights. In summary, at rest (h=0), the CG of the wheelchair user must move about at least 17.34”, in (-z) direction to get the wheelchair to tilt. But when the wheelchair is lifted to h = 13.89”, the slightest movement of the user’s CG in (-z) direction can get the wheelchair to tilt. </li></ul>
    16. 16. ETM 498 Mechanical Engineering Technology (Senior Project) Maximum Displacement Analysis: Figure 16: Seat Frame Displacement
    17. 17. ETM 498 Mechanical Engineering Technology (Senior Project) Maximum Principal Stress Analysis: Figure 17: Seat Frame Max. Principle Stress
    18. 18. Purchased Chair vs. Hybrid Wheelchair ETM 498 Mechanical Engineering Technology (Senior Project) Figure 18: Peter’s Current Chair Figure 19: Hybrid Chair
    19. 19. Manufacturing Summary <ul><li>Report summary: </li></ul><ul><li>about 30 parts to manufacture </li></ul><ul><ul><li>Lower triangular frame </li></ul></ul><ul><ul><li>Custom neck and axle assemblies </li></ul></ul><ul><ul><li>Custom adjustable supports for the seat </li></ul></ul><ul><ul><li>Custom seat for the child </li></ul></ul><ul><ul><li>Brackets </li></ul></ul><ul><li>Challenges for the Team </li></ul><ul><ul><li>Integrating the neck to the triangular frame </li></ul></ul><ul><ul><li>Manufacturing neck assembly </li></ul></ul><ul><ul><li>Developing a functional system to attach the wheels </li></ul></ul><ul><ul><li>Integrating the seat assembly </li></ul></ul>ETM 498 Mechanical Engineering Technology (Senior Project) Figure 20: Assembled Main Frame Figure 21: Head Tube and Steering Shaft
    20. 20. Manufacturing <ul><li>Integration of existing supports were fabricated into the hybrid wheel chair. </li></ul><ul><li>Weight was an issue </li></ul><ul><li>Every component was modified </li></ul><ul><li>to some extent </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project)
    21. 21. ETM 498 Mechanical Engineering Technology (Senior Project) Figure 22: E-Z Lock System Figure 23: Front Wheel Assembly Figure 24: Partial Assembly Figure 20: Assembled Main Frame
    22. 22. Assembly / Testing and Development ETM 498 Mechanical Engineering Technology (Senior Project)
    23. 23. Final Prototype ETM 498 Mechanical Engineering Technology (Senior Project) Table: Purple - Components of the shelf. RED – Frame manufacture at CCSU GRAY - Bike Wheels Yellow - Ski purchase and cut . Figure 1: Final Design
    24. 24. Conclusion <ul><li>What challenges the team faced? </li></ul><ul><li>Advantages of the Hybrid Wheelchair ? </li></ul><ul><ul><li>Freedom </li></ul></ul><ul><ul><li>Recreation </li></ul></ul><ul><ul><li>Flexibility </li></ul></ul><ul><ul><li>Comfort ability </li></ul></ul>ETM 498 Mechanical Engineering Technology (Senior Project) ETM 498- VIDEO CLIP
    25. 26. Works Cited <ul><li>www.globalspec.com/local/4352/CT </li></ul><ul><li>www.manta.com </li></ul><ul><li>www.freedommotors.com </li></ul><ul><li>www.usatechguide.org </li></ul><ul><li>www.ezlock.net/ </li></ul><ul><li>www.aavans.com/MobilityEquipment/EZLockWheelchairSecurement.aspx </li></ul><ul><li>www.spinlife.com/spintips/details/k/Wheelchair%20Armrest%20Choices/a/141/c/2 </li></ul><ul><li>www.medicalproductsdirect.com/wheelar.html </li></ul><ul><li>www.peakwheelchairs.com/HTML/wheelchairs-seating-foot.htm </li></ul><ul><li>www.edmond-wheelchair.com/wheelchair_leg_straps.htm </li></ul><ul><li>www.symmetric-designs.com/wheelchair-headrests-from-symmetric-designs.html </li></ul><ul><li>www.wheelchairnet.org/WCN_ProdServ/Products/cushion.html </li></ul><ul><li>www.wheelchairparts.net/ </li></ul><ul><li>magicwheels.com/ </li></ul><ul><li>www.TheMorganProject.org </li></ul><ul><li>www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1607383 </li></ul><ul><li>www.venturesnowboards.com </li></ul><ul><li>www.snowboarding.com/linx/industry/manuf.html </li></ul><ul><li>www.skisite.com/shopsList.cfm?state=CT </li></ul><ul><li>www.google.com </li></ul><ul><li>knobsource.thomasnet.com/  </li></ul><ul><li>www.pivotpins.com/catalog/catidx.html </li></ul>ETM 498 Mechanical Engineering Technology (Senior Project)
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