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Motorized Electric Trash Can 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

Randal McMasters

April 2013

Thesis Advisor: Professor Laura Caldwell

ii

ACKNOWLEDGEMENTS I would like to thank my father in law, Joseph Niese, who contributed large amounts of his own materials to me at no cost as well as countless hours of his own personal time to assist me in the fabrication and assembly for this project. I would also like to thank my wife for her continuous support throughout my college career and this project.

TABLE OF CONTENTS

ACKNOWLEDGEMENTS ...................................................................................................... II

TABLE OF CONTENTS .......................................................................................................... II

LIST OF FIGURES ................................................................................................................ III

LIST OF TABLES .................................................................................................................. IV

ABSTRACT ............................................................................................................................ IV

INTRODUCTION .................................................................................................................... 1

BACKGROUND .................................................................................................................................................... 1

EXISITING PRODUCTS ......................................................................................................... 1

CUSTOMER FEEDBACK, FEATURES, AND OBJECTIVES ............................................. 3

SURVEY ANALYSIS ............................................................................................................................................. 3 PRODUCT FEATURES AND OBJECTIVES ................................................................................................................ 4 ENGINEERING CHARACTERISTICS ........................................................................................................................ 5

DESIGN .................................................................................................................................... 6

DESIGN ALTERNATIVES AND SELECTION ............................................................................................................ 6 DRAWINGS ......................................................................................................................................................... 9 DESIGN – SUPPORT BARS ................................................................................................................................. 10 DESIGN – FRAME .............................................................................................................................................. 11 DESIGN – DRIVE SHAFT & MOTOR ................................................................................................................... 14 COMPONENT SELECTION ................................................................................................................................... 17 BILL OF MATERIALS ......................................................................................................................................... 18 FABRICATION .................................................................................................................................................... 18 ASSEMBLY ........................................................................................................................................................ 18 RECCOMENDATIONS ......................................................................................................................................... 20

SCHEDULE AND BUDGET ................................................................................................. 21

WORKS CITED ..................................................................................................................... 23

APPENDIX A - CURRENT PRODUCT RESEARCH ........................................................... 1

APPENDIX B - SURVEY RESULTS ..................................................................................... 1

APPENDIX C - QFD ................................................................................................................ 1

APPENDIX D - OBJECTIVES ................................................................................................ 1

iii

APPENDIX E - SCHEDULE ................................................................................................... 1

APPENDIX F - BUDGET ........................................................................................................ 1

APPENDIX G SHOP DRAWINGS ......................................................................................... 1

LIST OF FIGURES Figure 1 - Two Can Manually Operated Trash Can Cart .......................................................... 1

Figure 2 - Sanitation Vehicle .................................................................................................... 2

Figure 3 - Trash Can Dolly ....................................................................................................... 2

Figure 4 - Rounded Bottom Supports & Wheelchair Style Hand ............................................. 7

Figure 5 - Rounded Bottom Supports & Rounded Handle ....................................................... 7

Figure 6 - Flat Bottom Supports & Rounded Handle ............................................................... 7

Figure 7 - Rounded Bottom Supports & Wheelchair Style Handle .......................................... 7

Figure 8 - Front View ............................................................................................................... 9

Figure 9 - Top View .................................................................................................................. 9

Figure 10 - Side View ............................................................................................................... 9

Figure 11 - Isometric View ....................................................................................................... 9

Figure 12 - Back View .............................................................................................................. 9

Figure 13 - Trimetric View ....................................................................................................... 9

Figure 14 - Frame Beam Loading Diagram ............................................................................ 12

Figure 15 - Frame Shear Force Diagram ................................................................................ 12

Figure 16 - Frame Bending Moment Diagram ....................................................................... 13

Figure 17 - Free Body Diagram Shaft Design ........................................................................ 14

Figure 18 - Radial Loading Calculation Chart ........................................................................ 16

Figure 19 - Bill of Materials ................................................................................................... 18

Figure 20 - Assembly Picture 1 .............................................................................................. 19









Figure 29 - Assembly Picture 10 ............................................................................................ 19

Figure 30 - Assembly Picture 11 ............................................................................................ 19

iv

LIST OF TABLES Table 1 - Survey Results - QFD 3

Table 2 - Weighted Decision Matrix 8

Table 3 - Rolling Resistance Coefficients 14

Table 4 - Schedule 21

Table 5 - Budget 22

Motorized Electric Trash Can Cart Randal McMasters

1

INTRODUCTION

BACKGROUND

In order to get the trash to the local trash companies, the trash is usually delivered to the curb area in order to facilitate faster pickup on the part of the trash company. Currently the trash cans must be pushed or pulled, or place in a wheeled cart and drug to the curb. This can be a problem for a multitude of different segments of the population. These include elderly who don’t have the physical strength, people with significantly long drive ways, people whose trash cans have become in disrepair, etc. These people need a solution to get their trash to the curb. The focus of this design project will be to do just that, give the people who not only need a solution to these problems, but also to people who may just want an easier way to get their trash to the curb. Providing this solution will help these people be able to continue to complete this task with considerable ease as is expected for this task.

EXISITING PRODUCTS There are currently some products on the market that partially solve the problem, but don’t completely address all segments of the population that my solution will address. The product in Figure 1 (1) would address the segment of the population faced with their trash cans being in disrepair, but these are the only people it would help. This cart operates by the user loading two trash cans into the cart, and then lifting it up by one end and pulling it while it rolls on the wheels on the opposite end.

Figure 1 - Two Can Manually Operated Trash Can Cart


2

The cart in Figure 2 (2) has four wheels, and unless the large is considerably heavy it is reasonable to believe that minimal force would be required on the part of the user to get the cart to the curb. However, not all members of the elderly segment of the population would be able to supply the needed force to move this cart, and there needs to be a better solution to meets the needs of all parties.

This cart in Figure 3 (3) is for a specific line of trashcans, but there are also universal models available. It allows the user to place the specific models of trash can on the cart and push the trash can along easier than if they were moving the can without the cart. The user still needs to be able to direct and steer a trash can that could possibly be very heavy. If the user has low strength they may have trouble doing this.

Figure 2 - Sanitation Vehicle

Figure 3 - Trash Can Dolly


3

Custo

mer

import

ance

Curr

ent

Satisfa

ction

Pla

nned S

atisfa

ction

Impro

vem

ent

ratio

Modifie

d I

mport

ance

Rela

tive w

eig

ht

Rela

tive w

eig

ht

%

Affordable 4.5 4.1 5 1.2 5.5 0.11 11%

Easy To Operate 4.7 3.6 4 1.1 5.2 0.10 10%

Easy To Maintain 4.3 4.2 5 1.2 5.2 0.10 10%

Easy To Setup 4.1 4.2 5 1.2 4.8 0.09 9%

Operated By One Person 4.6 3.9 4 1 4.8 0.09 9%

Stable 3.9 3.3 4 1.2 4.7 0.09 9%

Safe 4.2 3.7 4 1.1 4.6 0.09 9%

Reliable 4.5 3.9 4 1 4.5 0.09 9%

Quiet 3.3 3 4 1.3 4.4 0.08 8%

Weather Resistant 4.1 3.9 4 1 4.2 0.08 8%

Energy Efficient 3.7 3.7 4 1.1 4 0.08 8%

CUSTOMER FEEDBACK, FEATURES, AND OBJECTIVES

SURVEY ANALYSIS

The survey was developed and distributed to 15 prospective customers in order to survey the level of importance of each feature to the customers, and also to survey the level of satisfaction they currently have with the available solutions to the problem. The survey focused on topics such as safety, affordability, and maintenance. Each person receiving the survey was asked to rate how important each of the features were to them on a 5 point scale where 5 was the most important/satisfied and 1 was the least important/satisfied.

After receiving the results from the surveys a survey analysis was conducted to develop the values listed in the “relative weThe above table shows the design objectives for this project sorted by their relative weight. The current customer satisfaction and importance levels were from the information collected from the surveys that were distributed to prospective customers.

Table 1 - Survey Results


4

PRODUCT FEATURES AND OBJECTIVES

The product objectives are from the list of customer features developed by interviewing and

talking to prospective customers. The customer features were used to generate engineering characteristics. These engineering characteristics and customer features were placed into a survey analysis. The percentages next to each product feature demonstrate the relative weight % based on the survey analysis. Under the heading of each product feature are objectives that have been determined that will need to be accomplished for this project in order to satisfy the customers. These product features and objectives are:

1. Affordable 11% Less than $600 prototype

2. Easy To Maintain 10% No needed maintenance other than for part failure

3. Easy To Operate 10% A standard steering method Standard braking On/Off Switch Turning Radius Equivalent To Lawn Tractor Total Weight Of Cart Plus Full Trash Can Less Than 150 Pounds Ability To Disengage Drive To Hand Maneuver

4. Safe 9% Chain & Belt Guards No Pinch Points No Sharp Corners Stationary Brake Emergency Stop

5. Operated By One Person 9% 6. Reliable function 9%

Reliability measured by component life and proper design criteria Wheels spec sheet Brakes spec sheet Motor spec sheet Power source spec sheet Fabricated parts use a design factor consistent with loading conditions & material

7. Stable 9% Tip-over calculation

8. Easy To Setup 9% No Assembly required

9. Energy Efficient 8% Operates for a month’s worth of trips on one charge

10. Quiet 8% Not more than 10% louder than traditional method of getting can to the curb

Measure decibels and compare results 11. Weather Resistant 8%

Rust-resistant material selection


5

Engineering Characteristic Relative Importance

Material 0.21

Size 0.14

Standard Components 0.11

Weight 0.09

Good Battery Life 0.09

Parts That Don’t Require

Preventative Maintenance0.08

Tool Free Setup 0.08

Noise Measurement 0.07

Low Noise Motor 0.07

Metal Finish 0.05

Able to operate in all types of weather Tires don’t slip in snow Motor can operate when raining

ENGINEERING CHARACTERISTICS

The table above shows the engineering characteristics that were considered in the design, fabrication, and assembly of the cart in order to achieve the design objectives. The engineering characteristics are in order by their respective relative importance. The relative importance is developed from deciding how much impact each characteristic has on each design objective and its own relative weight.


6

DESIGN

DESIGN ALTERNATIVES AND SELECTION

During the initial phase of the design the alternatives focused on two main aspects of the design. Those two main aspects were the style of the handle on the rear of the cart that would be used to guide the cart and the shape of the supports on the bottom of the cart. Four different alternatives were developed combining the two main aspects to create multiple varieties.


7

Figure 4 - Rounded Bottom Supports & Wheelchair Style Hand

Figure 5 - Rounded Bottom Supports & Rounded Handle

Figure 6 - Flat Bottom Supports & Rounded Handle

Figure 7 - Rounded Bottom Supports & Wheelchair Style Handle


8

Table 2 - Weighted Decision Matrix

Item Weight

Rounded

Bottom

Supports

&

Wheelchair

Style

Handle

Rounded

Bottom

Supports

&

Rounded

Handle

Flat

Bottom

Supports

&

Rounded

Handle

Flat

Bottom

Supports

&

Wheelchair

Style

Handle

Affordable 11% 3 4 4 3

Easy To Maintain 10% 3 1 2 4

Easy To Operate 10% 3 3 3 3

Safe 9% 2 4 4 2

Operated By One Person 9% 3 3 3 3

Reliable 9% 3 3 3 3

Stable 9% 2 4 4 2

Easy To Setup 9% 2 4 4 2

Energy Efficient 8% 3 3 3 3

Quiet 8% 3 3 3 3

Weather Resistant 8% 3 3 3 3

Total 2.73 3.14

3.25 2.84

These alternatives were placed into a weighted rating method chart and graded for how they fared against the product features. Adjusting for overall weight of these features and looking at the overall score for each alternative a decision was made to go with the alternative that featured flat bottom supports and a rounded handle. While it is not shown in the table due to it not originally being a focus of the design alternatives and selection, it will be seen in the drawings of the cart that the motor was later relocated due to safety reasons.


9

DRAWINGS

Figure 8 - Front View

Figure 9 - Top View

Figure 12 - Back View

Figure 10 - Side View

Figure 11 - Isometric View Figure 13 - Trimetric View


10

DESIGN – SUPPORT BARS

The loading conditions that this cart was designed for were developed by contacting the local trash removal company about some specifications. The company has a weight limit restriction of 50 pounds of waste that can be placed into one garbage can. The rest of the information used for the loading conditions was from getting the average weight of the style of trash can that this cart is being designed for, which is roughly 20 pounds.

The material that is being used for the steel supports is ASTM A108 1018 Carbon Steel. The published value of yield strength for this material is between 45-55ksi.

� � 36��

� � 516 ��

ℓ � 36��

� � 70��4 �� 17.5��

� � 17.5��36�� 0.49 ��

��


11

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8 � 79 �� ' ��

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� 4900 ��

-!��.� /� �� 0�!�1 2��!�.�� 34 ��!��()*+

� 45,000��4900�� 9.3

The design factor for the support bars is considerably high, but the decision was made to leave the number of support bars the same in order to account for uncontrolled variables such as placement of trash can by user and possible overloading the trash can beyond the 50 pound limit.

DESIGN – FRAME

The design of the frame uses the same info as the design of the support bars of the weight of a trash can and the maximum weight being added to the trash can. Prior to developing calculations in order to verify that the design was sufficient enough to handle the estimated weight the plan was to use ½” diameter aluminum tubing, but the calculations showed that this would not have been acceptable so the size of the tubing was increased to ¾”.


12

Figure 14 - Frame Beam Loading Diagram

∑ �* � '�17.5��"�10��" ' �17.5��"�20��" ' �17.5��"�30��" + �9:"�39��"=0

9: � 26.92��

; �: � �17.5��"�9��" + �17.5��"�19��" + �17.5��"�29��" + �17.5��"�39��"' �9*"�39��" � 0

9* � 43.08��

Figure 15 - Frame Shear Force Diagram


13

Figure 16 - Frame Bending Moment Diagram

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The factor of safety for the described loading conditions for the frame is just about 2. This should account for any unknown variables created by the user of the cart.


14

DESIGN – DRIVE SHAFT & MOTOR

For the design of the drive shaft and motor the target was to be able to drive the cart up a 6 degree incline (incline of wheelchair ramp) at a speed of approximately 2.5 miles per hour. Table 3 - Rolling Resistance Coefficients

Rolling Resistance Coefficient

c

0.04 - 0.08 car tire on solid sand

0.2 - 0.4 car tire on loose sand

Figure 17 - Free Body Diagram Shaft Design


15

After working through the calculations, parameters were defined in order to size the motor appropriately. Extensive searching was done is order to purchase a motor that could produce the applicable requirements, but due an extremely high cost, the design decision was made with approval from my advisor to purchase a wheelchair motor because the assumption was reasonably made it could support and drive this load.


16

Figure 18 - Radial Loading Calculation Chart


17

The design of the shaft was completed using the same parameters of the motor. The shaft was designed to be able to handle the amount of torque the motor will need to produce in order to drive the cart at the desired speed with a factor of safety of at least two built in to the design.

COMPONENT SELECTION

• Frame o 6061-T6 Round Drawn Aluminum Tubing o Aluminum Slip-On Rail Fittings o Support Bars & Motor Plate - ASTM108 1018 Carbon Steel

• Motor & Drive System o Invacare Wheelchair Motor o Shaft - 1566 steel o Steel Timing Belt Pulley & Timing Belt o Solid Rubber Tire / Swivel Casters o Bronze Pillow Block Bearings

• Electrical o Normally Open Contact Switch

� Must be pressed at all times for motor to operate (Emergency Stop) o Wiring & Connectors


18

BILL OF MATERIALS

Figure 19 - Bill of Materials

FABRICATION

• Cutting of aluminum tubing to size for frame

• Cutting steel drive shaft to size

• Slotted steel angle iron pieces cut to size for mounting motor & motor box

• Flexible aluminum sheeting cut to size for motor box

• Cut steel mounting plates for swivel casters & batteries

• Modification of rail fittings to install gate

• Reaming of pulleys to fit shaft

ASSEMBLY

• Frame o Sections of aluminum inserted into slip-on rail fittings and secured

with metal welder adhesive & set screw o Support bars bolted to frame o Motor box made from slotted steel angle iron pieces mounted to frame

and aluminum sheeting zip screwed to the pieces

• Motor & Drive System o Motor bolted to slotted steel angle iron pieces mounted vertically on

rear end of frame o Bearings bolted to frame o Roll pins used to secure pulleys to shafts o Plate under motor stops it from gradually sliding down over time

Item Description Item Number Supplier Qty

DAYTON Mounted Bronze Bearing Mounted Bronze Bearing, Bore 5/8 in, 2 Bolt Pillow

Block, Load Capacity Maximum PV 50000, Self Aligning Type, Pressed Steel Housing 2X529 Grainger 2

8" pneumatic swivel caster 42485 Harbor Freight 2

8" solid rubber tire 65705 Harbor Freight 2

Steel Drive Shaft 5/8" OD, 60" Length 1346K28 Mcmaster-Carr 1

Low-Carbon Steel Rectangular Bar 5/16" Thick, 1" Width 36" Length 8910K611 Mcmaster-Carr 4

Low-Carbon Steel 90 Degree Angle 2" X 2" Legs, 3/16" Wall Thickness 36" Length Herschberg 1

Aluminum Slip-on Rail Fittings 3-Way 90 Degree Elbow, Fits 3/4" Pipe Size 4698T111 Mcmaster-Carr 6

Aluminum Slip-on Rail Fittings Tee W/Through Hole, for 3/4" Pipe Size 4698T14 Mcmaster-Carr 6

Aluminum Slip-on Rail Fittings 3-Way 90 Deg Elbow W/Through Hole, Fits 3/4" Pipe Sz 4698T36 Mcmaster-Carr 2

Aluminum Slip-on Rail Fittings 90 Degree Elbow, Fits 3/4" Pipe Size 4698T31 Mcmaster-Carr 6

7 Ah 24 Volt AGM Mobility Scooter Battery Pack (Premium) X99-0772 Monster Scooter Parts 1

New Invacare motor and gearbox # 1107665 dg-111a Wheelchair 24V DC7185 1107665 Zasales.biz 1

6061-T6 Aluminum Round Drawn Tube-1-.125-96" (8 Feet) Length 6061-T6 ARDT-1-.125-96" Bobco Metals 9

Hinged One-Piece Clamp-on Shaft Collar, Steel, 5/8" Bore, 1-1/2" OD, 13/32" Width 5714K573 Mcmaster-Carr 2

L and H Series Timing Belt Pulley, H-Series, Fit 3/4" & 1" W Belt, 2.797" OD, 16 Teeth 6495K44 Mcmaster-Carr 2

Trapezoidal Tooth Neoprene Timing Belt, 1/2" Pitch, Trade Size 300H, 30" Outer

Circle, 1" W 6484K173 Mcmaster-Carr 1

Spring Pin,Slot,1/4x3 L 5BY73 Grainger 2

Spray Paint,Black,10 oz. 6FGH4 Grainger 3


19

• Electrical o Wiring secured in wire jacket and ran through tubing to switch o Wiring soldered to switch inside project box o Switch mounted in project box

Figure 20 - Assembly Picture 1 Figure 21 - Assembly Picture 2

Figure 22 - Assembly Picture 3

Figure 23 - Assembly Picture 4 Figure 24 - Assembly Picture 5 Figure 25 - Assembly Picture 6

Figure 26 - Assembly Picture 7 Figure 27 - Assembly Picture 8 Figure 28 - Assembly Picture 9

Figure 29 - Assembly Picture 10 Figure 30 - Assembly Picture 11


20

RECCOMENDATIONS

• Don’t use structural fittings due to high increase in overall cost

• Reduce overall size by redesigning motor placement

• Change motor type to cheaper motor

• Redesign drive system to allow for better control


21

SCHEDULE AND BUDGET The official beginning to the schedule is October 14, 2012. The schedule carries through all of the steps of the process to complete the design project, and culminates with the Final Project Report on April 22, 2013. The budget for this project will include the following:

1. All purchased parts.

2. All raw materials needed for manufactured parts.

Below is a table estimating the prototype cost for this project for each category of parts as well as

Table 4 - Schedule

TASKS

Proof of Design to advisor

Concept sketches to advisor

Choose Best Design Concept

Report Draft

Final Report

Solidworks Drawings

Design Frame

Design Power System

Design Wheel System

Design Freeze

Bill Of Materials

Order / Purchase Components

Oral Report To Faculty

Oral Report To Advisor

Assembly

Testing

Modifications / Adjustments

Final testing

Demo To Advisor

Expo

Project Oral Report To Faculty

Final Project Report

22

25

4

4

16

16

22

11

9

18

23

25

25

15

16

16

2

4

23

15

24

8

5

20

15

1

8

8

15

15

15

30

30

13

13

1

22

22

22

22

22

23

23

April

22

October NovemberDecember January February March

Randal McmastersElectric Trash Can Cart


22

showing the current amount actually spent thus far.

Table 5 - Budget


23

WORKS CITED

1. 250-Pound Capactiy Dual Trash Can Cart, Trash Cart, Garbage Disposals. [Online] 2012. [Cited: September 9, 2012.] http://www.garbage-disposals.net/250poundcapacitydualtrashcancart-p-7174.html . 2. Continental 3255 Trash Can Dolly. [Online] 2003-2012. [Cited: September 9, 2012.] http://www.webstaurantstore.com/continental-3255-trash-can-dolly/6902640.html . 3. Handmade Garden Wheelbarrow. [Online] 2012. [Cited: September 9, 2012.] http://www.garbage-disposals.net/250poundcapacitydualtrashcancart-p-7174.html .

Appendix A1

APPENDIX A - CURRENT PRODUCT RESEARCH

250-POUND CAPACITY DUAL TRASH CAN CART This cart can accommodate two separate trash cans that can weigh up to 250 pounds total. You have to lift one end of the cart and roll it on the wheels on the other end.

Carries 2 trash cans

Holds 250-Pound

Adjustable side bars

Rolls quietly on solid rubber tires

Coated with durable epoxy coating

1" aluminum tube construction. 6" wheels make it

easy to move about. Individually packaged in a

display carton. Shipped knocked down easy to

assemble. Will hold (2) 30 gallon cans.

Has to be able to lift the weight of both and be able to hold it up while steering the cart. Design would be propelled by an electric motor.

$33.50

http://www.garbage-disposals.net/250poundcapacitydualtrashcancart-p-7174.html 9/9/12

Appendix A2

sanitation vehicle/ cleaning/ dust cart/ garbage truck wheelbarrow WB9904 The intended use for this cart is two separate small garbage cans, but could be used for residential use if you used one large can instead of two separate small cans.

Four wheels which would make it easier. It doesn’t appear to have any way to keep the trash cans in place which could cause problems when going down any sort of steep hill. My design will incorporate some method of keeping the cans in place for safe transport.

No price available

http://www.wheelbarrow-china.com/wheel-barrow/516.html 9/9/12

Appendix A3

Continental 3255 Trash Can Dolly This cart is for a specific line of trashcans, but there are also universal models available. It allows the user to place the specific models of trash can on the cart and push the trash can along easier than if they were moving the can without the cart.

This Continental 3255 twist-on, twist-off round Dolly converts a stationary trash can into a mobile hard working tool. It fits both the Continental Huskee and Rubbermaid Brute 20, 32, 44 and 55 gallon trash cans and features five, 3" non-marking swivel casters.

The user still needs to be able to direct and steer a trash can that could possibly be very heavy. If the user has low strength they may have trouble doing this. With my design the cart will be being propelled by the electric motor and it will take minimal effort to direct and steer it.

$20.99 /EA

http://www.webstaurantstore.com/continental-3255-trash-can-dolly/6902640.html 9/9/12

Appendix B1

APPENDIX B - SURVEY RESULTS

Motorized Electric Trash Can Cart

CUSTOMER SURVEY

This survey is being done as part of my senior design project to attain my bachelor’s degree in mechanical engineering technology. I am in the process of designing, testing, and building a motorized electric trash can cart for residential use, and I am interested in what features are the most important to my potential customers. How important is each feature to you for the design of a new motorized electric trash

can cart? Please circle the appropriate answer. 1 = low importance 5 = high importance AVG

1. Safe 1 2 3(3) 4(5) 5(6) N/A 4.21 2. Affordable 1 2(1) 3(1) 4(3) 5(10) N/A 4.47 3. Easy To Maintain 1 2(1) 3(2) 4(3) 5(9) N/A 4.33 4. Easy To Operate 1 2 3 4(5) 5(10) N/A 4.67 5. Operated By One Person 1 2 3(2) 4(2) 5(11) N/A 4.60 6. Reliable 1 2 3(1) 4(6) 5(8) N/A 4.47 7. Stable 1 2 3(5) 4(5) 5(4) N/A 3.93 8. Energy Efficient 1 2(3) 3(5) 4(2) 5(6) N/A 3.69 9. Quiet 1 2(4) 3(5) 4(4) 5(2) N/A 3.27 10. Weather Resistant 1 2(1) 3(2) 4(6) 5(6) N/A 4.13 11. Easy To Setup 1 2(1) 3(3) 4(5) 5(6) N/A 4.07

How satisfied are you with the current non-motorize trash can carts available? Please circle the appropriate answer. 1 = very unsatisfied 5 = very satisfied AVG

1. Safe 1(1) 2 3(6) 4(4) 5(4) N/A 3.67 2. Affordable 1 2(1) 3(3) 4(5) 5(6) N/A 4.07 3. Easy To Maintain 1 2 3(3) 4(6) 5(6) N/A 4.20 4. Easy To Operate 1 2(3) 3(4) 4(4) 5(4) N/A 3.60 5. Operated By One Person 1(1) 2(1) 3(2) 4(6) 5(5) N/A 3.87 6. Reliable 1 2(1) 3(4) 4(5) 5(5) N/A 3.93 7. Stable 1(1) 2(2) 3(5) 4(6) 5(1) N/A 3.33 8. Energy Efficient 1(2) 2(2) 3(1) 4(2) 5(7) N/A(1) 3.71 9. Quiet 1(2) 2(3) 3(5) 4(3) 5(2) N/A 3.00 10. Weather Resistant 1 2(1) 3(4) 4(5) 5(5) N/A 3.93 11. Easy To Setup 1 2(2) 3 4(6) 5(7) N/A 4.20

How much would you be willing to pay retail for an item like this?

$0-$50(2) $50-$100(10) $100-$150(2) $150-$200(1)

Thank you for your time.

Appendix C1

APPENDIX C - QFD

Siz

e

Sta

ndard

Com

ponents

Weig

ht

Mate

rial

Meta

l Fin

ish

Nois

e M

easure

ment

Parts T

hat D

on't

Require P

reventa

tive M

ain

tenance

Good B

attery

Life

Low

Nois

e M

oto

r

Tool Fre

e S

etu

p/Insta

llation

Custo

mer im

portance

Curr

ent S

atisfa

ction

Pla

nned S

atisfa

ction

Impro

vem

ent ra

tio

Modifie

d Im

portance

Rela

tive w

eig

ht

Rela

tive w

eig

ht %

Safe 3 3 4.21 3.67 4 1.1 4.6 0.09 9%

Affordable 3 9 9 3 4.47 4.07 5 1.2 5.5 0.11 11%

Easy To Maintain 3 9 4.33 4.2 5 1.2 5.2 0.10 10%

Easy To Operate 3 3 4.67 3.6 4 1.1 5.2 0.10 10%

Operated By One Person 3 3 4.6 3.87 4 1.0 4.8 0.09 9%

Reliable 3 3 4.47 3.93 4 1.0 4.5 0.09 9%

Stable 1 1 3 3.93 3.33 4 1.2 4.7 0.09 9%

Energy Efficient 9 3.69 3.71 4 1.1 4.0 0.08 8%

Quiet 3 9 9 3.27 3 4 1.3 4.4 0.08 8%

Weather Resistant 9 3 4.13 3.93 4 1.0 4.2 0.08 8%

Easy To Setup 9 4.07 4.2 5 1.2 4.8 0.09 9%

Abs. importance 1.50 1.22 0.93 2.25 0.56 0.76 0.89 0.95 0.76 0.84 10.7 51.8 1.0 1.0

Rel. importance 0.14 0.11 0.09 0.21 0.05 0.07 0.08 0.09 0.07 0.08 1.0

Randal McMasters

Electric Trash Can Cart

9 = Strong

3 = Moderate

1 = Weak

Appendix D1

APPENDIX D - OBJECTIVES Below are the product objectives that are being taken into consideration. After each feature is a more detailed explanation as to what will be designed into the product.

1. Affordable 11%

Less than $600 prototype 2. Easy To Maintain 10%

No needed maintenance other than for part failure 3. Easy To Operate 10%

A standard steering method Standard braking On/Off Switch Turning Radius Equivalent To Lawn Tractor Total Weight Of Cart Plus Full Trash Can Less Than 150 Pounds Ability To Disengage Drive To Hand Maneuver

4. Safe 9% Chain & Belt Guards No Pinch Points No Sharp Corners Stationary Brake Emergency Stop

5. Operated By One Person 9% 6. Reliable function 9%

Reliability measured by component life and proper design criteria Wheels spec sheet Brakes spec sheet Motor spec sheet Power source spec sheet Fabricated parts use a design factor consistent with loading conditions & material

7. Stable 9% Tip-over calculation

8. Easy To Setup 9% No Assembly required

9. Energy Efficient 8% Operates for a month’s worth of trips on one charge

10. Quiet 8% Not more than 10% louder than traditional method of getting can to the curb

Measure decibels and compare results 11. Weather Resistant 8%

Rust-resistant material selection Able to operate in all types of weather

Tires don’t slip in snow Motor can operate when raining

Appendix E1

APPENDIX E - SCHEDULE

Appendix F1

APPENDIX F - BUDGET

Appendix G1

APPENDIX G SHOP DRAWINGS

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