Team Reacher

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Team Reacher
Dr. Harvey Lipkin ME 4182 April 21st, 2004

• Shaun Black
• Brandon Castleberry
• David Dixon

• Ryan Reynolds
• David Senneway
• Colleen Yaeger

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Reach Assisting Device
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Agenda

• Background
• Problem Statement
• Initial Design
• Final Design
• Engineering Analysis
• Prototype Fabrication
• Prototype Demonstration
• Future Work
• Questions

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Background of Reacher

• Extends length of natural reach
• Trigger actuation
• Naturally open grippers

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Problem Statement

• Target consumer group elderly people with
  limited range of motion and strength.
• Target use, based on potential user input
  Retrieval of dropped everyday objects including
  but not limited to eyeglasses, cordless
  telephone, television remote, silverware, and
  articles of clothing
• Design Criteria
• Locking mechanism
• Stability
• Comfort
• Ease of use (input force, hand placement)

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Initial Design
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Final Design
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Engineering Analysis Results
Weight analysis Calculated using volume and
density Prototype Approx 2.3 lbs - heavy Final
Design (al) Approx 1.4 lbs - reduced wall
thickness Final Design (ABS plastic) lt 1
lb Deflection Analysis Calculated by modeling
as a simple cantilever beam Deflection at the
end of the device while grasping a 2 lb object
was determined to be negligible, lt0.01
in Fatigue Analysis Device was determined to
function for essentially unlimited uses. Force
Analysis Device requires at most 11 input vs
grasping force ratio.
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Deflection
Y
X
L in
P lb
M(x)
o
1 in sq, 1/8 in thick
x
V(x)
P lb
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Prototype Fabrication Body
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Prototype Fabrication Handle
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Prototype Fabrication Claw
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Prototype Fabrication Initial Assembly
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Final Prototype Demonstration
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Future Work

• Weight Reduction
• smaller wall thickness
• Number of parts reduction
• machined claw assembly
• injection molded plastic

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Questions?