MECH 447 - Senior Design Capstone Project Prepared for: William Bill Dick Instructor of Mechanical...
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MECH 447 - Senior Design Capstone Project Prepared for: William Bill Dick Instructor of Mechanical Engineering University of Nebraska-Lincoln By: Rao, Manu Vengeta Kathirasen, Kathirgugan Kong, Liran Zhang, Dingwei LOAD-TRIGGERED WALKER
MECH 447 - Senior Design Capstone Project Prepared for: William Bill Dick Instructor of Mechanical Engineering University of Nebraska-Lincoln By: Rao,
MECH 447 - Senior Design Capstone Project Prepared for: William
Bill Dick Instructor of Mechanical Engineering University of
Nebraska-Lincoln By: Rao, Manu Vengeta Kathirasen, Kathirgugan
Kong, Liran Zhang, Dingwei LOAD-TRIGGERED WALKER
Objective Madonna Rehabilitation Hospital identified need for
load-triggered mechanism accidentally slips eliminate the need for
person using the walker to use hand- triggered brake or any other
type of manual braking mechanism Major considerations : 1) need for
mobility 2) need for effective fall prevention mechanism
Slide 4
Background Duro-Med 2-Button Adjustable Aluminum Folding Walker
($45.99) NOVA "GetGo" 4203 Rolling Walker ($99.99)
Slide 5
Design
Slide 6
THE ARC MECHANISM Force Angle()F-Tube 2211lb 2914lb 3617lb
4320lb 5022lb 5725lb * 20lb to disengage the magnet
Slide 7
Mobility
Slide 8
Step 1: Pull out the pins and disengage the brake tube and the
rotating bar. Shows the pin mechanism that if pulled in the
direction shown, would disengage and allow the walker to be
folded
Slide 9
Mobility Step 2: Disengage the Velcro strap to the horizontal
bar, and push the tube and bar downwards. Shows the handle that is
attached to the upper horizontal bar which has Velcro padding
Slide 10
Mobility Step 3: The walker is folded and the user can hold the
strap to move the walker
Slide 11
Mobility
Slide 12
Design for Manufacture
Slide 13
Cost cam-ratchet mechanism = $ 62.70 walker = $ 222.58
Production costs (SAE guidelines) - cam-ratchet mechanism = $ 9.07
- walker amounted to = $ 56.65 total cost = $ 422.77 addition of
overhead costs, bureaucracy, additional modification and profits =
market value of $ 800