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CONSTRUCTION OF WHEELBARROW

ABSTRACT

Wheelbarrow is a simple machine, which belong to the second-class lever. This is because the load or resistance is placed between the effort and the fulcrum. It is used in many areas of work to convey loads that are too heavy or bulky to be carried by hand. Wheelbarrow can be used as farm equipment, industrial equipment among others.
However, the efficiency of the wheelbarrow depends on the materials used for the construction. A wrong choice of these materials can reduce the efficiency and the life span of the machine.
Although no machine can operated with 100 percent efficiency because the friction of its parts always use up some of the energy that is being supplied to the machine. But friction can be decreased by oiling any sliding or rotating parts.
Moreover, depending on the type/size of machine to be constructed, the materials are reduced to smaller and more convenient sizes. The shapes and forms are changed by the following constructional operations, marking out, cutting, drilling, filling, recurring, taping broaching, folding/bending, welding, surface coating etc.
Most of these operations may be carried out by use of manual or mechanized processes depending on the size of the workshop.
In conclusion, a fixed amount of load was placed on the wheelbarrow to determine the efficiency and the effort required to lift the load. And according to the result gotten, the machine is highly efficient and required a very small effort to move objects many times their own size.

CHAPTER ONE

INTRODUCTION

wheelbarrow is the means of carrying load about which nature had provided him, has been a problem to him. He is limited in load he carries, the distance he could carry them and the speed at which he could travel. As a result of this, standard wheelbarrow that are made of materials which can withstand shock were produced. The tyre of the standard wheelbarrow serve as a shock absorber due to the air inside it. It can move on a road that is not smooth. A wheelbarrow is a large open bowel with a wheel and two handle that can be used to carry load. It works under the principle of second class lever. In this class of lever the load is in between the effort and the fulcrum (the aside). The aim for the production of this machine is to lessen the difficulties and probably eliminate loss of man-power, time, money and more especially the need for technological break through and self reliance..  The wheelbarrow at the axle, the serve applied at the handles and coal or resistance between the two in the body.  It is used by laborers, farmers, gardeners and others for transporting loads too heavy or bucky to be carried by hand and is similar to hand trucks used by warehouse men and industrial workers expect that the latter has two wheels.  Modern wheelbarrow are made of wood or of a light metal, such as aluminum, and have a rubber fire on the wheel.  A two-wheel vehicle for carrying garden materials is more properly called a garden cart.

The purpose of the production of wheelbarrow is to reduce alleviate and possibly eliminate the sufferings, time, money, wastage of man-power and more especially the need for technological break-through and self reliance, which has been a major concern of the federal government.

Moreover, this project at hand has delved into simplicity and the construction of this machine that can be used to carry different types of heavy load to any distance.

1.2   ORIGIN AND HISTORY

The wheelbarrow like any technology in the common place, was a story to tell.  The west was very slow to invent the wheelbarrow.  Do the earliest known European wheelbarrow gleams down from a stained glass windows in charless cathedral.

But the Chinese have had wheelbarrow for millennia.  They celebrate a half-mythical inventor named K0 Yu.  It is not know when he lived but since then, the Chinese have shaped wheelbarrow in enormous variety.  They’ve used them for every kind of task.

It migue help to consider just what an industrial wheelbarrow is.  It combines the advantages of both the wheel and the leveler.  The load is centered behind a single wheel that way, you have to lift only a small part of the load.  The two handles give an intimacy of control you don’t have with a four-wheeled cart.  If you ever had to use a wheelbarrow, you know its easy with the load in the right place.  It can be back breaking when the load’s too far behind the wheel.

Chinese armies made the first use of the wheelbarrow.  It give them such an advantage in moving goods that it was kept secret.  Early Chinese writings talk about wheelbarrow in code.  K0 Yu, one ancient text tells us built a “wooden goat” and rode away into the mountains on it.  They called a wheelbarrow with handles in front a “wooden ox” one with handles at the back was a “glinding horse”

Long ago, the Chinese invented wheelbarrow with sails that were no idle experiment said – driven wheelbarrows became a well-developed and widespread technology.  And the sails were prefect miniatures of the ones used in junk.

And we, with all our vaunted technology, have yet to build wheelbarrows with the grace, balance, variety and features of these in China.

TABLE OF CONTENT

Title page
Dedication
Acknowledgement
Abstract
Table of contents
 
CHAPTER ONE
INTRODUCTION
HISTORY/ORIGIN
MACHINE
PRINCIPLES OF MACHINE
– EFFICIENCY
– MECHANICAL ADVANTAGE
SIMPLE MACHINES
THE LEVER MACHINE
CLASSES OF LEVERS
FIRST CLASS LEVERS
SECOND CLASS LEVERS
THIRD CLASS LEVERS
COMPUND LEVERS
 
CHAPTER TWO
LITERATURE REVIEW
SCIENCE OF MATERIALS
ELECTRONIC MOTOR USED IN WHEELBARROW CONSTRUCTION
MOTOR SUPPLY
MOTOR CONTROL
MAJOR CATEGORIES
PERFORMANCE PARAMETERS OF ELECTRIC MOTORS USED IN WHEELBARROW CONSTRUCTION
CONTINUOUS TORQUE DENSITY
CONTINUOUS POWER DENSITY
PROPERTIES OF MATERIALS OF CONSTRUCTION
MATERIALS FOR CONSTRUCTION OF A STANDARD MOTORISED WHEELBARROW 
ALLOY DESIGNATION
GENERAL ALLOY CHARACTERISTICS
 
CHAPTER THREE
MATERIAL SELECTION
COMPONENT PART DESCRIPTIONS
BASIC MACHINE TOOL OPERATIONS
METAL REMOVAL
METAL FORMING OPERATIONS
CONSTRUCTION METHOD
UPPER / TOP VIEW
LOWER PARTS/ UNDERNEATH VIEW 
SIDE VIEW
 
CHAPTER FOUR
CALCULATION/COST EVALUATION
COST EVALUATION
 
CHAPTER FIVE
DISCUSSION
SUMMARY
CONCLUSION
REFERENCES
APPENDIX 

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