Design & Force Analysis of Portable Hand Tiller

TABLE OF CONTENTS

Title Page No.

LIST OF FIGURES

LIST OF TABLES

LIST OF SYMBOLS

Chapter 1: INTRODUCTION 1

Chapter 2: LITERATURE REVIEW 2

2.1 Studies of available tillers 3

2.1.1 Honda F400 3

2.2.2 Cutting operation 4

2.2.3 Handling tips 4

2.2.4 Specification 5

2.2 Tiller blades 5

Chapter 3: DESIGN 7

3.1 Design basics 7

3.2 Mechanism 9

3.2.1 Power transmission 9

3.2.2 Cutting mechanism 9

3.3 Designing of individual components 10

3.3.1 Driven shaft 10

3.3.2 Wheel shaft 13

3.3.3 Blade 15

3.3.4 Driver and Driven pulley 16

3.3.5 Structure 18

3.4 Selection of joining methods 19

Chapter 4: ANALYSIS 20

2 DESIGN & FORCE ANALYSIS OF PORTABLE HAND TILLER

4.1 Software used 20

4.2 Analysis of component 21

4.2.1 Driven shaft 21

4.2.2 Wheel shaft 26

Chapter 5: ASSEMBLY 31

5.1 Driven shaft assembly 31

5.2 Main assembly 33

5.3 CAD Drawing 34

Chapter 6: ADVANTAGES OF HAND TILLER 35

Chapter 7: APPLICATIONS 36

Chapter 8: MAINTENANCE AND SAFETY 37

Chapter 9: CONCLUSION AND FUTURE SCOPE 38

Reference 39

Dept. Of Mechanical Engg, AWH. Engg College, Kuttikkattoor


LIST OF FIGURES

Figure Title Page no.

Fig. 2.1: Component identification 3

Fig. 2.2: Tine installation 4

Fig. 3.1: Elements in mechanism 9

Fig. 3.2: Cutting mechanism 10

Fig. 3.3: Driven Shaft 13

Fig. 3.4: Wheel Shaft 14

Fig. 3.5: Blade 16

Fig. 3.6a: Driver pulley 17

Fig. 3.6b: Driven pulley 18

Fig. 3.7: Structure 19

Fig. 4.1: Driven shaft analysis 21

Fig. 4.2: Driven shaft mesh drawing 23

Fig. 4.3: Driven shaft stress analysis result 23

Fig. 4.4: Driven shaft displacement analysis result 24

Fig. 4.5: Driven shaft strain analysis result 25

Fig. 4.6: Fixed shaft analysis 26

Fig. 4.7: Fixed shaft mesh drawing 27

Fig. 4.8: Fixed shaft stress analysis result 28

Fig. 4.9: Fixed shaft displacement analysis result 29

Fig. 4.10: Fixed shaft strain analysis result 30

Fig. 5.1a: Tiller assembly with safety guard 31

Fig. 5.1b: Tiller assembly without safety guard 32

Fig. 5.2: Driven Shaft Assembly 33

Fig. 5.3: Main Assembly – top view 34



LIST OF TABLES

Title Page no.

Tab. 2.1: specifications 5

Tab. 3.1: Design procedure 8

Tab. 3.2: Material property (main shaft) 13

Tab. 3.3: Material property (wheel shaft) 15

Tab. 4.1: Driven shaft material property 22

Tab. 4.2: Driven shaft mesh information 22

Tab. 4.3: Fixed shaft material property 26

Tab. 4.4: Fixed shaft mesh information 27



LIST OF SYMBOLS

D: Diameter of shaft, mm

FOS: Factor of safety

N: Speed, rpm

P: Power, watts

Ss: Stress of shaft, N/mm2

T: Torque, Nmm



ACKNOWLEDGEMENT

First and for most we would like to thank the almighty for his infinite grace and help,

without which this project would not have reached its completion. We are also thankful to prof.

JUSTIN D’COUTO, head of department. We would like to thank our project guide and Project in

Charge Mr. RUSTUM USMAN for their guidance and valuable advice from the beginning till the end

of the project. We would also like to express our sincere gratitude to Mr. KUNJHIKANNAN for his

support throughout the project



ABSTRACT

Low efficiency and substandard machines are common problems in agricultural

mechanization in most developing countries. Agriculture in India has a significant history. As Per the

2010 world agriculture statistics, India is the world's largest producer of many fresh fruits and

vegetables, milk, major spices, select fresh meats, select fibrous crops also. So mechanization will

have a huge effect on Indian farming

Our project aims at designing a PORTABLE HAND TILLER by understanding the soil

physics of Kerala and needs of small scale farmers. Machine is aimed to be cost effective low

maintenance and local crop friendly, the blade carrying shaft is designed in such a way that the blades

can be replaced according to the soil physics and tilling requirements


Documents

Design & Force Analysis of Portable Hand Tiller