Battery Powered Garden Cart
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Battery Powered Garden Cart A Baccalaureate thesis submitted to the School of Dynamic Systems College of Engineering and Applied Science University of Cincinnati in partial fulfillment of the requirements for the degree of Bachelor of Science in Mechanical Engineering Technology by James Kirk April 2013 Thesis Advisor: Janet Dong, Ph.D. ACKNOWLEDGEMENTS I would like to thank my advisor Dr. Janet Dong, and the rest of the staff at the University of Cincinnati in the Mechanical Engineering Technology department. Without their years of conveyed knowledge this project would not have been possible. Also, I would like to thank my friends and family for providing me with support and other essential things necessary to accomplish this project. Finally, I would especially like to thank my mother for inspiring me to do this project. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS ...................................................................................................... II TABLE OF CONTENTS ........................................................................................................ III LIST OF FIGURES ................................................................................................................ IV LIST OF TABLES .................................................................................................................. IV ABSTRACT .............................................................................................................................. II INTRODUCTION .................................................................................................................... 1 BACKGROUND .................................................................................................................................................... 1 EXISTING PRODUCTS .......................................................................................................... 2 NEUTON BATTERY POWERED GARDEN CART..................................................................................................... 2 GORILLA DUMP CART ........................................................................................................................................ 4 FARM-TUFF NURSERY WAGON .......................................................................................................................... 5 LITTLE GIANT FLATBED CART ........................................................................................................................... 7 EXISTING PRODUCTS SUMMARY ........................................................................................................................ 8 COMPONENT RESEARCH .................................................................................................... 9 TRANSAXLE DC MOTOR .................................................................................................................................... 9 TELCO MOTION WHEELCHAIR GEAR MOTOR ................................................................................................... 10 JAZZY ELITE HD POWER WHEELCHAIR............................................................................................................ 11 CUSTOMER FEEDBACK, FEATURES AND OBJECTIVES ............................................ 12 SURVEY ANALYSIS ........................................................................................................................................... 12 CUSTOMER FEATURES & IMPORTANCE WEIGHTS............................................................................................. 14 ENGINEERING CHARACTERISTICS ..................................................................................................................... 16 PRODUCT FEATURES AND OBJECTIVES ............................................................................................................. 17 CONCEPT GENERATION AND SELECTION ................................................................... 19 3 WHEEL RECTANGULAR FRAME DESIGN ........................................................................................................ 19 4 WHEEL SINGLE BEAM FRAME DESIGN .......................................................................................................... 20 4 WHEEL A FRAME DESIGN .............................................................................................................................. 21 WEIGHTED DECISION MATRIX ......................................................................................................................... 22 ASSEMBLY SPECIFICS ....................................................................................................................................... 23 CALCULATIONS ................................................................................................................................................ 24 COMPONENT SELECTION .................................................................................................................................. 26 FABRICATION ...................................................................................................................... 27 PICTURES OF PROGRESS ................................................................................................................................... 27 TESTING ................................................................................................................................ 30 FINAL RESULTS ................................................................................................................................................. 30 SCHEDULE AND BUDGET ................................................................................................. 32 CONCLUSION & RECOMMENDATIONS ......................................................................... 34 WORKS CITED ..................................................................................................................... 35 APPENDIX A – GARDEN CART RESEARCH & COMPONENTS .................................... 1 iii APPENDIX B – CUSTOMER SURVEY AND RESULTS .................................................... 1 APPENDIX C – QUALITY FUNCTION DEPLOYMENT ANALYSIS ............................... 1 APPENDIX D – PROJECT OBJECTIVES ............................................................................. 1 APPENDIX E – SCHEDULE .................................................................................................. 1 APPENDIX F – BUDGET ....................................................................................................... 1 LIST OF FIGURES Figure 1 - Neuton Battery Powered Garden Cart ...................................................................... 2 Figure 2 - Gorilla Dump Cart.................................................................................................... 4 Figure 3 – Gorilla Spec Sheet ................................................................................................... 4 Figure 4 - Farm-Tuff Nursery Wagon ...................................................................................... 5 Figure 5 – Farm-Tuff Specs ...................................................................................................... 6 Figure 6 - Little Giant Flatbed Cart .......................................................................................... 7 Figure 7 - Model 318 Transaxle Motor..................................................................................... 9 Figure 8 - Wheelchair Gear Motor.......................................................................................... 10 Figure 9 - Jazzy Elite HD........................................................................................................ 11 Figure 10 - 3 Wheel Rectangular Frame Design .................................................................... 19 Figure 11 - 4 Wheel Single Beam Design .............................................................................. 20 Figure 12- 4 Wheel A Frame Design ...................................................................................... 21 Figure 13 - Single Beam Frame Only ..................................................................................... 23 Figure 14 - Dimensioned Cart................................................................................................. 23 Figure 15 - Free Body Diagram of Post & Hopper Top ......................................................... 24 Figure 16 - Motor Installed ..................................................................................................... 27 Figure 17 - Semi Assembled Base Cart .................................................................................. 27 Figure 18 - Fully Assembled Base Cart .................................................................................. 28 Figure 19 - Hopper Fabrication ............................................................................................... 28 Figure 20 - Finished Cart ........................................................................................................ 29 Figure 21 - Initial Load Testing .............................................................................................. 30 Figure 22 - Multiple Testing ................................................................................................... 30 Figure 23 – MPI ...................................................................................................................... 31 LIST