Me463 Final Presentation 2

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Me463 Final Presentation 2

  1. 1. Karthik Kumar Sebastian Schillo Ben Baker Jessica Thompson Johannes Ruf
  2. 2. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  Walker Dimensioning and Parts ◦ Modeling ◦ Justification ◦ Risk Assessment ◦ Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 2
  3. 3. To design and construct a bariatric walker that will aid or assist those weak of strength or balance to walk in a safe and convenient manner.  Provide support to obese or elderly  Carry additional medical items  Ensure safety ME463 TEAM BASS DESIGN REVIEW 3
  4. 4. All aluminum  frame Heavy-duty  lockable hinges Ergonomic  handle bars Reverse braking  mechanism An in-built belt  Telescopic legs  Latched gate  entry ME463 TEAM BASS DESIGN REVIEW 4
  5. 5. Primarily for elderly and obese users  Weight capacity of 200kg  ◦ Tradeoff between weight and structure of the walker Requirements: Relatively light Strong brakes No slip/slide when stationary Increased protection against falling Provisions to carry IV equipment ME463 TEAM BASS DESIGN REVIEW 5
  6. 6. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  Walker Dimensioning and Parts ◦ Modeling ◦ Justification ◦ Risk Assessment ◦ Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 6
  7. 7. The primary features of the walker are:  ◦ Adjustable height for convenience to users ◦ Foldable length for efficient storage ◦ Spring loaded door for entry and automatic closing behind user ◦ Straps attaching to side walls, serving as fall protection ◦ Default-locked hand brakes to ensure walker is stationary while entering and until user ready for motion ME463 TEAM BASS DESIGN REVIEW 7
  8. 8. ME463 TEAM BASS DESIGN REVIEW 8
  9. 9. ME463 TEAM BASS DESIGN REVIEW 9
  10. 10. Connection of  square aluminum pipe segments ◦ Inter-connections and leg connections via heavy duty hinges, lockable at 0˚ and 180˚ ME463 TEAM BASS DESIGN REVIEW 10
  11. 11. Simple telescoping  design ◦ Pin connections set height ◦ Larger top portion for door attachment ◦ Easy attachment to caster wheels ME463 TEAM BASS DESIGN REVIEW 11
  12. 12. Torsion spring  connection to legs ◦ Allows user to only have to open door to enter, as door will automatically close behind user. ◦ Contains hooked connection to support straps ME463 TEAM BASS DESIGN REVIEW 12
  13. 13. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  ◦ Walker Dimensioning and Parts  Braking ◦ Modeling ◦ Justification ◦ Risk Assessment Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 13
  14. 14. Caster Wheels Handlebar   ME463 TEAM BASS DESIGN REVIEW 14
  15. 15. Push down the  handlebar to unlock the brakes. ◦ Brakes locked automatically to guarantee that walker will not slip. ◦ Provides high stability for patient while entering walker ME463 TEAM BASS DESIGN REVIEW 15
  16. 16. ‣ Interface to the frame is held by bolts. ‣ Slide bearings reduce friction while moving. ‣ Torsion spring provides resistance against pushing down and is used to unlock the brakes. ‣ Integration of functions can be reduced at the cost of a higher complexity of the part ME463 TEAM BASS DESIGN REVIEW 16
  17. 17. 4” in diameter  and width 2”. Made of  polyurethane Excellent for  use on wet surfaces and grips well on hospital floors. ME463 TEAM BASS DESIGN REVIEW 17
  18. 18. ‣Webbed PP Straps Connect to door o and side bar o Purpose to prevent or alleviate damage from falling ‣IV pole connection Screwed to front o leg o Hangs down or out ME463 TEAM BASS DESIGN REVIEW 18
  19. 19. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  Walker Dimensioning and Parts ◦ Modeling ◦ Justification ◦ Risk Assessment ◦ Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 19
  20. 20. Buckling of Leg  Bending of Handlebar  Strength of Fall Protection  ME463 TEAM BASS DESIGN REVIEW 20
  21. 21. F Fb = 17,528 lbs Fmax = 440 lbs SF = 39.84 ME463 TEAM BASS DESIGN REVIEW 21
  22. 22. F σyield = 35,000 psi σ = 17,378 psi δmax = 0.37 in SF = 2.02 ME463 TEAM BASS DESIGN REVIEW 22
  23. 23. σmax = 11,600 psi F σ = 698.27 psi SF = 16.61 ME463 TEAM BASS DESIGN REVIEW 23
  24. 24. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  Walker Dimensioning and Parts ◦ Modeling ◦ Justification ◦ Risk Assessment ◦ Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 24
  25. 25. Some existing products offer:  Foldability  Intelligent braking system  Interfaces to commonly used medical devices  Fall protection This product offers all of the above with  special emphasis on safety. ◦ Increases range of users. ME463 TEAM BASS DESIGN REVIEW 25
  26. 26. Walker intended to support, while standing or  moving, human bodies that may be particularly frail and may have otherwise needed wheelchairs. Thus, points of highest risk are:  ◦ Falling ◦ Entering walker The product has been designed primarily with these risks in mind ME463 TEAM BASS DESIGN REVIEW 26
  27. 27. Only when falling will the walker need to  support the entire weight of the user. ◦ Provide as much safety as possible without reducing functionality. ◦ Belt installment can significantly prevent or lower the consequence of most falls. ◦ Plan B: Place belt through the legs to improve front fall protection.  Not implemented, as would reduce functionality  Handlebar designed in such a way to reduce likelihood of front tipping, as force applied downwards and well within base area. ME463 TEAM BASS DESIGN REVIEW 27
  28. 28. Users of the walkers are inherently potentially  weak or fragile. ◦ While standing, users often try to lean on walker as a support. Wheels are default-locked.  ◦ Provides stable support while entering. Walker is back-entry with torsion spring  door. ◦ Allows users to entry directly into back from a chair. ◦ User does not have to turn around to close and lock door. ME463 TEAM BASS DESIGN REVIEW 28
  29. 29. Mainly used material: 6061-T6  Aluminum alloy with magnesium & silicon  Some properties:  Min. yield strength 35000psi (241MPa)  Max. tensile strength 42000psi (290MPa)  ME463 TEAM BASS DESIGN REVIEW 29
  30. 30. Introduction  Product Profile  ◦ Problem Definition ◦ Concept: Product Functions and Features ◦ User Profile Engineering Analysis  Walker Dimensioning and Parts ◦ Modeling ◦ Justification ◦ Risk Assessment ◦ Future Activities  ◦ Gantt Chart ME463 TEAM BASS DESIGN REVIEW 30
  31. 31. ME463 TEAM BASS DESIGN REVIEW 31
  32. 32. ME463 TEAM BASS DESIGN REVIEW 32

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