Transcript ADJUSTABLE MECHANICAL STILTS

INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
MANUALLY
ADJUSTABLE
STILTS
SCHEDULE
CONCLUSION
“Easy Lifts”
1
INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
GROUP MEMBERS
Trent Hilliard
Ian Juurlink
Brad Poirier
Mitchell Weir
SUPERVISOR
Dr. Marek Kujath
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INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
3
INTRO
CURRENT STILTS:
PROBLEM
IDEAS
DESIGN
1. Used for tasks requiring
small rises in elevation
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
2. Difficulties:
• Getting on stilts
• Picking up objects
• Adjusting
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INTRO
GETTING UP:
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
5
INTRO
PICKING UP OBJECTS:
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
6
INTRO
GETTING DOWN:
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
LIFTING DEVICE
PROBLEM
IDEAS
1. Power screw
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
http://forums.vwvortex.com
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INTRO
LIFTING DEVICE
PROBLEM
IDEAS
2. One leg-lift
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
LIFTING DEVICE
PROBLEM
IDEAS
3. Hydraulic Scissor Lift
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
www.autoliftuk.com
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INTRO
LOCKING DEVICE
PROBLEM
IDEAS
Rotary Ratchet
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
www.wikipedia.org
www.istockphoto.com
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INTRO
LIFTING DEVICE: SCISSOR LIFT
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
LIFTING DEVICE: SCISSOR LIFT
PROBLEM
IDEAS
DESIGN
ANALYSIS
1. Member Design
2. Member
Confinement
BUDGET
SCHEDULE
CONCLUSION
3. Assembly
Materials
•
•
•
Aluminum
Bushings
Snap Rings
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INTRO
LIFTING DEVICE: SCISSOR LIFT
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
LOCKING MECHANISM:
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
LIFTING DEVICE: SCISSOR LIFT
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
PROBLEM
IDEAS
DESIGN
LINEAR DAMPER:
1. Gas Spring
2. Provides upward force
3. SAFETY feature
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
FORCE DETERMINATION:
PROBLEM
IDEAS
DESIGN
W = Force Applied
ANALYSIS
L = Length of
Beam
BUDGET
SCHEDULE
CONCLUSION
D = Location of
Center of
Gravity
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INTRO
Stress Analysis:
PROBLEM
Stress in Most Heavily Loaded Beam
IDEAS
50
45
DESIGN
BUDGET
SCHEDULE
CONCLUSION
Stress (ksi)
ANALYSIS
Aluminum Yield Stress
40
35
30
25
20
15
Minimum
Locking
Height
10
5
0
0
5
Total Stress
Bending & Axial
10
15
Height (in)
20
25
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INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
Item
Item Cost Qty.
Stilts
$365.00 1
Bearings
$1.41 16
Bushings
$0.72 16
Aluminum Plating
$88.16 1
Steel Flat Bar
$6.96 2
Aluminum Flat Bars
$6.30 6
Pins
$6.00 2
Concept Prototype
$50.00 1
Snap Rings
$36.31 1
Actuator
$30.00 2
Locking Mechanism
$74.80 1
Damper
$50.00 2
TOTAL (with 10% contingency)
Total Cost
$365.00
$22.56
$11.52
$88.16
$13.92
$37.80
$12.00
$50.00
$36.31
$60.00
$74.80
$100.00
$1,274.16
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INTRO
CRITICAL SCHEDULE ITEMS
PROBLEM
IDEAS
DESIGN
Jan/14/10:
Final Drawing Submission
ANALYSIS
BUDGET
SCHEDULE
Feb/01/10:
All material obtained
CONCLUSION
March/01/2010:
Fabrication and assembly
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INTRO
CRITICAL SCHEDULE ITEMS
PROBLEM
IDEAS
DESIGN
March/22/10:
Testing
ANALYSIS
BUDGET
SCHEDULE
April/08/10:
Final report submission
CONCLUSION
April/10/10:
Final presentation
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INTRO
WHAT’S LEFT?
PROBLEM
IDEAS
1. Fine details on locking mech.
DESIGN
ANALYSIS
2. Finalize the damper force
BUDGET
SCHEDULE
CONCLUSION
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INTRO
QUESTIONS?
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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INTRO
WALKING WEIGHTS:
PROBLEM
IDEAS
1. Current Stilts weight:
15.5 lbs.
2. Competitor stilts:
14-17 lbs
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
3. Miner’s work boots:
4. Target stilt weight:
7 lbs
<20 lbs
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INTRO
PROBLEM
IDEAS
DESIGN
ANALYSIS
BUDGET
SCHEDULE
CONCLUSION
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