Classic Rocker

1
Classic Rocker

• Team 7
• Thomas Dabrowski
• Sarah Philo
• Adam Rauwerdink

2
Outline

• Introduction
• Specifications
• Physical Challenges
• Market Analysis
• Optimal Design
• Budget
• Timeline
• Conclusion

3
Introduction

• Self-rocking legless rocker
• Passionworks Studio in Athens, Ohio
• NSF funded
• Dr. Hallowell at Ohio University
• Classic Rocker will provide a smooth,
  comfortable rocking motion activated by a simple
  switch
• Audio system will also be included

4
Physical Challenges

• Users have wide array of physical and mental
  limitations
• Cerebral palsy, Multiple sclerosis, varying
  levels of paralysis
• Coordination
• Muscle control
• Mental abilities and attentiveness
• Seizures of varying intensity (some CP)

5
Specifications

• Rocking mechanism
• Comfortable speed
• Comfortable range of motion
• Does not require permanent attachment to floor
• Control
• Simple power switch for user
• Control of audio by user
• Caretaker has master control for all power and
  for music track and volume
• All easily accessible and with high ease of use
• Audio
• Internal speakers
• Input from CD player accessible to caretaker

6
Market Analysis

• Electronic and Mechanical Assistant Technologies
  Motorized Rocking Chair

• NSF Project Rensselaer Polytechnic Institute
  1989 The Mechanical Rocking System

7
Market Analysis (cond)

• Various non-mechanized legless rockers, available
  at many major retailers (Wal-Mart, Target, etc)
• Numerous patents granted for mechanized rocking
  systems

8
Optimal Design
9
Frame

• Aluminum external and internal frames
• External base
• Hinge Mechanism
• Internal chair reinforcements

10
Power

• Mean Well SE-600-12 Enclosed Power Supply
• Supplies 600-Watts of Power _at_ 12V from 0-50A
• Compensates for both the audio system and
  gearmotor running at full draw without straining
• Actual power supply will provide a lower wattage
  after CD player power tests are completed

11
Motor and Linkage

• Dayton 12VDC gearmotor 1L474
• 6.5 amps full draw
• 150 in-lb torque (41needed)
• Geared to 20 RPM
• Cam and linkage system
• Cam 1.6 diameter
• Linkage bar 5 long
• Creates chair displacement of 7 at top
• Moving parts covered for safety

12
Controls

• 2 Sets User and Caretaker
• User - interchangeable switches for activation of
  rocking motion and mute function for audio
• Squish switch
• Touch switch
• Caretaker Master power to all chair components,
  plus control of CD player

13
Audio

• Boss Audio CD-3020 CD player installed in tower
  behind chair
• MA Audio HK-35 Speakers inside headrest of chair

14
Control Schematic
15
Budget

• Rest of budget will be used for error analysis

16
Timeline
17
Timeline (cond)
18
Conclusion

• Analysis of forces with scale models and Working
  Model 2D software
• Preliminary analysis of power needs
• Located optimal audio and electrical equipment
• Frame construction options (Weld or 80/20 Inc.)

19
Prior Designs
Design III
Design II
Design I
20
Appendix

• Related Patent Numbers
• 6,899,393
• 6,695,799
• 6,412,867
• 6,318,803
• 6,152,529

21
Appendix

• Load vs. Input Voltage for SE-600-12 Power Supply

22
Appendix