ABSTRACT
Mechanical engineering department of the named
institute has many non operational machines sequel to this fact maintenance
which resulted to non development and non maintenance of the institute
community at large.
By this fact the project (mechanical
lawn mower) was constructed and design to help in the development and
maintenance of institution, community and the society at large in the area of
grass cutting in our environment and the improvement in our food production and
also the reduction of manpower.
In other words, during the
construction and design of this project many things were put into consideration
such as our environmental condition, effectiveness of the machine and also
maintenance were well observed and a minimized cost of maintenance and a highly
successful repair was adopted and also the appropriate tools cost and quality
of material were well consider.
TABLE
OF CONTENTS
Title
page
Letter
of transmittal
Release
page
Signature
page
Approval
page
Dedication
Acknowledgement
Abstract
Table
of contents
List
of symbols
CHAPTER ONE
1.0 introduction
1.1
Identification
of need
1.2
Literature
review
1.3
Historical
background of the project (scope)
1.4
Importance
of the project no society
1.5
Aims
and objectives of the project
CHAPTER TWO
2.0 specification
of problem
2.1 scope
of specification and condition of use
2.1.1 Characteristic
2.1.2 Performance
2.1.3 Appearance
2.1.4 Reliability and life
2.1.5 Synthesis of solution
2.1.6 Theory and analysis of problems
CHAPTER THREE
3.0
Design
concept of the lawn mower
3.1 design
specification of the lawn mower
3.2
Design
concept
3.3
Detail
design of a lawn mower
3.4
Design
solution
3.5
Material
selection
3.6
Design
calculation
3.7
Analysis
of the problem
CHAPTER FOUR
4.0 mode
of construction
4.1
Tools/equipment
use for the construction of the project
4.2
Fabrication
techniques/sequence of operation
4.3
Assembly
of the project
4.4
Description
of each component
4.5
Safety
precaution
4.6
Result
of the operation carried out
CHAPTER FIVE
5.1
Estimation
of cost
5.2
Conclusion
of recommendation
5.3
References
of bibliography
LIST
OF SYMBOLS
G = Density
d = Diameter
of the shaft
D = Diameter
of the blade
W = Omega
Angular Speed
J = Second
Moment of inertia
M = Mass
of the object
T = Torque
TI = Pie
V = Velocity
F = Cutting
force
P = Power
s = Shear stress
å = Strain
L = Length
B = Breadth
H = Height
CHAPTER ONE
INTRODUCTION
In the past, cutting of grasses in the
schools, sports track, or field, industries hotels, pubic center, etc was done
by cutlass this method of manual cutting is time consuming a s it is human
effort that is needed for cutting, there was also inaccuracy in cutting level
using the manual cutting system.
Apart from all these old method of
cutting there is also risk of accident.
The problems of the manual was meant
to be overcome with the aid of this project (the construction of a mechanical
lawn mower) which is used for cutting of grasses to equal height or level for
speedy cutting.
This project lawn mower, is also the
accident free as well, it reduced labour and also reduced number personnel that
is needed in a particular operation, it also reduced man power as it an
internal combustion engineer that dose the actual cutting while the operator
provides the efforts, great portion of land can easily be cut with lawn mower.
Again to encourage beauty in our
environment this project was embarked on to help in keeping our environment
clean because most labourers are finding it difficult in handily tool for
gasses cutting. It is also used for
cutting sports field, (like foot ball pitch as well as crowns in hotel and
business premises so this project reduces human effort and should be encouraged
in school, hotel, business area, etc although mowers can be of electric type
too, but we decided to fabricate a mechanical type to overcome the problem of
electricity and as such this our lawn mower can be used every where even were
there is no electricity.
IDENTIFICATION OF
NEED
Early before now, West Africa as a
whole, the peasant farmer depends on the hoe and cutlass for practically all
farm operation. There tools vary in
shape and size from place to place in the high forest zone of Nigeria the small
farmer must clear thick bush every three or four years. All this job is being done either hoe or
cutlass for weeding of farm land. These
farm operation depend entirely on the energy of the farmer using the tools
which he has at this disposal. This
inability that facing the farmer, has triggered these project group to research
into the lasting solution to the problem.
Also, with meant development in the
country, daily labour in farm operation is highly exorbitant for the farmer to
afford but with these project (mechanical lawn mower) this problem of high
payment of local labour can lead to reduction importation cost from Germany USA
of this machine Nigerian with high profitability to the farmers.
1.2
LITERATURE REVIEW
1.3
HISTORICAL BACKGROUND OF THE
PROJECT (SCOPE)
Based on the developing countries,
technology in farm operation is highly increased. It is clear that developments in farm
machinery in West Africa started far back 1960.
This project must related to the social and ecological condition
prevailing in different parts of this great region at the present time two
trends a re apparent.
i.
Increase
in the use of tractors and large agricultural machinery of farms of large
extent both in the high forest and savanna zones, but particularly in the
latter.
ii.
The
increased use of animal power and small machines on peasant farms operation in
West Africa will become increasingly mechanized, and that stage of
mechanization mechanized, and that stage of mechanization which lies between
the hoe and cutlass on one hand and the tractor combine harvester on the other
is referred to as intermediate technology.
1.4 IMPORTANCE OF THE PROJECT TO SOCEITY
Generally this project (mechanical
lawn mower) has a great effect towards development and maintenance of any
community in the societies which one nominated below.
1.
Cutting
grass of secondary primary and tertiary field thereby reducing human effort
needed.
2.
Great
portion of farmland can easily cut or brushed with lawn mower in one day.
3.
This
project reduced number of personnel that needed in a particular farm operation.
4.
To
reduce manpower
5.
To
improve the economy of the country
6.
Provisions
of foreign exchange in the country
7.
t
reduce importation cost t o our country (Nigeria)
8.
It
encourage pupils, and student to be regular and the school because no more
cutting of grass with cutlass by pupils or students.
1.5 AIMS AND OBJECTIVES OF THE PROJECT
In the past, several investigation w ere made in the
lawn mower industry at USA, Germany etc. Nigerian market, from which this
production is a development of already existing ones. It was localized to smite our environments
condition aim and objectives of the investigation on the project are nominated
below.
1.5.1 REDUCTION OF LABOUR COST
In application of lawn mower machine in any government
field and farm land causes seriously reduction in number of labour needed in
the maintenance of the yard, brushing and clearing of the grass but with aid of
lawn mower machine, the job is easily performed without much wasting of
time. This project IMT can get the yard
well cutted and cleared.
1.5.2 IMPROVEMENT OF FOOD PRODUCTION
Local farmer can embark on maintenance of 100 hectares
of farm land with aid of lawn mower machine.
This project will extract some lazy farmer to embark on farming
operation, also many people will developed interest and rendering agricultural
engineering or course related to farm.
1.5.3 TIME FACTOR
The production of this project (lawn mower machine)
brings reduction in man hour consumed in cutting of grass which is being
improved using lawn mower machine which
employed some minute of an how for the
job.
1.5.4
IMPROVEMENT IN ECONOMY.
Having farmer embark on large farm
land for production of food to the citizen birth aid of lawn mower machine but
not hand tools is bound so produce supply enough quantities food to market
which extract improvement of country and also ensure stability and the foreign
exchange. Also boosting of employment to
the youth of the town.
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