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DCPD – John Deere/PTC. University of Illinois Phase 2 Final Presentation. HandiGator Easy Access for Handicapped person into seat Goals/Problem Statement Process Design Recommendations AUV Gator Steering in Water Steering Lever Rudder Assembly. Overview. Goals/Problem Statement - PowerPoint PPT Presentation
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Southeast Engineering Center
DCPD – John Deere/PTC
University of IllinoisPhase 2 Final Presentation
Southeast Engineering Center
Overview
• HandiGator– Easy Access for Handicapped person into seat
• Goals/Problem Statement• Process• Design• Recommendations
• AUV Gator– Steering in Water
• Steering• Lever• Rudder Assembly
Southeast Engineering Center
• Goals/Problem Statement– To design a modular chair lift to aid a
handicapped person getting into and out of a John Deere Gator
– Design Parameters• Mechanized power• Translate the chair outside the vehicle • Lowered and rotated for easy entry• Return to operating position• While minimizing cost
HandiGator
Southeast Engineering Center
HandiGator
Process
x- Maximum seat bar distanceFCM- Force of the gator at its center of massA- Location of tire, where moments are taken fromFPerson- Force of personFor 6X4 GatorAssuming 4X2 gator weighs 1000lb
ftx
inx
inlbxlbM
lbFlbF
A
Personcm
91.9
95.118
079.2458.1199350
35058.1199
ftx
inx
inlbxlbM A
90.5
83.70
079.241000350
Step 1) Find maximum distance that chair can be translated away from vehicle without tipping the vehicle
Southeast Engineering Center
HandiGator
Step 2) Ideas
∙sliding rail, rotating seat∙ three bar linkage seat ∙ translating, rotating seat, lower/raising circular seat
Southeast Engineering Center
HandiGator
Step 3) Power Requirements
∙Place the hydraulic/electric cylinder from the existing Gator bed lift kit in a position to raise and lower the chair
∙Specifications of cylinder have not been found, but calculations of requirements have been finished
P
F
LL
D
Ax
Ay
Bx
By
P-weight of personL-length of barD-width of seatF-required force from cylinderAx, Ay, Bx, By-force from hinge on bar, F-angles
0sin2
1sincos
2
1coscos
2
1
0sin
0cos
DBLFLDFLDPM
FABF
FPABF
yA
xxx
yyy
Southeast Engineering Center
HandiGator
Design
Southeast Engineering Center
HandiGator
Southeast Engineering Center
HandiGator
Southeast Engineering Center
HandiGator
Recommendations for Next Semester
1) Finalize power specifications
2) Find parameters for cylinder
3) FEA on design, make improvements
4) Create a BOM
Southeast Engineering Center
• Steering in Water
AUV Gator
∙Engaged when in water, but disengaged when out of water
∙Unobtrusive to the chassis design
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AUV Gator
∙Lever ~ Engaging the Rudder System
∙One easy to use devise∙Central location∙Unobtrusive to the chassis design
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AUV Gator
Rudder AssemblyParameters:∙ Find required surface area to turn with in 15? Ft∙ Not restrict ground clearance∙ Optimized flow from propulsion system
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• Scaling for Boat Rudder Data
Data for Average Water CruiserDimensions: Length: 18’6” Width: 7’6”Weight: 2650 lbs dry, 3850 lbs wetAverage Speed: 20 mphRudder Size: 5 ¾” x 12”By looking at this data, although the sizes are different; draft in the water is approx. the same as it will be for the Gator, and Top Speed as well as Weight is almost exactly 4 times that of the goal estimate for the gator. Because of this similarity, a rudder of the same size will work well for the gator.With this conclusion, it was deemed best to put two rudders on the gator, one behind each tire to maximize steering ability and storability when not in use.
AUV Gator
Southeast Engineering Center
• Rudder design
AUV Gator
Southeast Engineering Center
Recommendations for Next Semester
AUV Gator
1) Define component placement on finished Chassis design
2) Define lengths of cables, and proper position on lever
3) FEA on design, make improvements
4) Create a BOM
Southeast Engineering Center
General Recommendations
1) Use project link to its full capacity
2) More timely support from sponsors
3) Stronger definition of goals for each team
Southeast Engineering Center
Questions?