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

Southeast Engineering Center

AUV Gator

∙Lever ~ Engaging the Rudder System

∙One easy to use devise∙Central location∙Unobtrusive to the chassis design

Southeast Engineering Center

AUV Gator

Rudder AssemblyParameters:∙ Find required surface area to turn with in 15? Ft∙ Not restrict ground clearance∙ Optimized flow from propulsion system

Southeast Engineering Center

• 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?