Transcript Team John Deere Mid-Term Presentation Week 7 Josh Ebeling

Team John Deere
Mid-Term Presentation
Week 7
Josh Ebeling
Jamari Haynes
James June
Mike Reno
Ben Spivey
Gary Twedt
Wade Burch
Project Objectives

The objective of this
design project is the
creation of a kit-ready
modification to the pedal
controls of the John
Deere Gator Utility
Vehicle in order to
facilitate accessibility by
those unable to perform
current use
Project Parameters and Constraints


Task assigned by John Deere is
the open-ended modification of
their six wheeled Gator Utility
Vehicle to facilitate handicapped
accessibility ($2,000 budget)
Primary Suggestions:
• Wheelchair hoisting
mechanism
• Controls modification primarily foot pedals
Project Details


Project coordinated through John Deere in
conjunction with UMass (wheelchair hoisting
mechanism) and UIUC (sliding drivers seat)
Mechanical Engineering students charged with
design and construction of prototype, with
Industrial Design students aiding in overall
ergonomics of new system, and some
modeling help from students in AutoCAD class
Preliminary Conceptual Designs

Two main conceptual design modes:
Preliminary Conceptual Designs

Two main conceptual design modes:
• On- or near-steering wheel controls
Preliminary Conceptual Designs

Two main conceptual design modes:
• On- or near-steering wheel controls
• Triggers located behind steering wheel
Motor
Preliminary Conceptual Designs

Two main conceptual design modes:
• On- or near-steering wheel controls
• Bicycle-type brake handles on steering wheel
Preliminary Conceptual Designs

Two main conceptual design modes:
• On- or near-steering wheel controls
• Pivoting lap bar located below steering wheel
Preliminary Conceptual Designs

Two main conceptual design modes:
• Throttle lever controls
Preliminary Conceptual Designs

Two main conceptual design modes:
• Throttle lever controls
• Throttle lever with pivot bar
Preliminary Conceptual Designs

Two main conceptual design modes:
• Throttle lever controls
• Throttle lever with pivot bar
Pull Handle
Cable
Pulley
Brake Pedal
Current Market Availability



Current industry
standard and most
prevalent design is the
Braun 3500 Hand
Control
Easily integrated for a
variety of car sizes and
types
Less than desirable
required dexterity and
force to operate
Conceptual Design Selection

Evaluation matrix of
conceptual designs
constructed using Braun
3500 as a baseline
Weight
Braun/MPR 3500
(Symbol)
Braun/MPR 3500
(Adjusted Points)
0.29
0.10
0.10
0.10
+
+
+
0.24
0.19
/
+
1.71
0.57
0.10
0.57
0.00
0.71
1.14
Human Factors
Ease of installation
Ergonomics
Ease of operation- strength
Compatibility with steering
0.1
0.2
0.3
0.4
/
+
+
0.30
1.20
0.30
2.40
Manufacturing
Materials cost
Complexity of fabrication
0.50
0.50
/
/
1.50
1.50
Safety
Complexity/likelihood of failure
Significance of failure
0.50
0.50
/
-
1.50
0.50
Functional Performance
Reliability
Maintenance
Noninterference with pedals
Noninterference with other functions
(i.e. passenger seat)
Responsiveness
Feedback
Rating
14.01
Matrix
Ratings
Strong
+
6
Medium
/
3
Poor
-
1
Ultimate Design Selection



Ultimately selected some
variation on the throttle
lever with pulley
Most ergonomic and
greatest opportunity for
decreasing force
necessary for operation
Easiest to facilitate
normal use while
modification remains
intact
Pull Handle
Cable
Pulley
Brake Pedal
Design Mock-Up
Design Prototype Mockup
Available for demonstration
Further Project Challenges



Integration of throttle bar
into convenient and
ergonomic location on
Gator
Uneven pedal
depression paths
Design must remain
easy to install and put in
and out of operation
Questions?