617559_Mega_Exavator

learning manual

Excavator Have you ever tried to dig your fingers into soil to copy the action of a Backhoe? You will find that it takes some considerable effort in doing so.

A backhoe performs this task efficiently and quickly. It is a powerful machine capable of doing work equivalent to as many as 500 horses. Excavators are designed to dig out soil or lift heavy objects.

Excavators are mainly actuated using hydraulic power. This is because hydraulic system can transmit force from one point to another effectively and flexibly. A hydraulic system is used where a large amount of force is required for doing work and where precision and control is more important than speed.

Materials List: Total number of components: 316

PCS

PCS

No

PARTS NAMES

1

18

L GEAR

1

3-HOLE ROD

16

19

LONG FRAME

2

3

5-HOLE ROD

9

20

LONG ROD

6

4

7CM DR.AXLE

2

21

M CHAIN GEAR

4

5

BASE GRID

2

22

M DR. AXLE

2

6

BATTERY (two 1.5V or one 9V)

1

23

MOTOR AXLE

3

7

BATTERY HOLDER, AA, 2 batteries

1

24

PEG

8

BATTERY SNAP

1

25

RACING TIRE

4

9

BENDED ROD

6

26

S DR. AXLE

7

10

CABLE TIE, 6"

25

27

S GEAR

1

11

DPDT

3

28

SHORT FRAME

7

12

DRIVE CHAIN

120

29

SQUARE FRAME

7

13

DUAL ROD

2

30

TWO-IN-ONE CONVERTER

6

14

GEAR FIXING

2

31

5ml SYRINGE

6

15

GEAR MOTOR 60

3

32

SYRINGE CONNECTOR-1 mtr

3

16

GEAR MOTOR TO SHAFT ADAPTER

3

17

HINGE

8

No

PARTS NAMES

1

PEG/AXLE REMOVER

2

52

TOTAL :

316

Parts of materials:

5

3 2

1

4

x01

x02

x09

x02

x16

6 7

9 8

10

x25

x01 x01

x01

x06

11 14

13

12

15

16

x02 x02

x03

x03 x120 x03 17

19

18

20

21

x06

x01

x04 x08 23

x02

22

26

24

25

27

x02 x03 x07

x04

x01

x52

28 29

30 31

x07 x07

32

x06 x06

x03

Assembly Manual: Steps of construction

Stage: 1 Make 1 more mirror assembly of the same

Stage: 2

Stage: 3

Stage: 4

Stage: 5

Stage: 6

Stage: 7

Stage: 8

Stage: 9

Stage: 10

Stage: 11

Stage: 12

Stage: 13

Stage: 14

Stage: 15

Stage: 16

Stage: 17

Stage: 18

Stage: 19

Stage: 20

Stage: 21

Stage: 22

Stage: 23

Stage: 24

Stage: 25

Stage: 26

Stage: 26.5

Stage: 27

Stage: 28

Stage: 28.5

Stage: 29

Stage: 29.5

Stage: 30

Stage: 31

Stage: 32

Stage: 33

Stage: 34

Stage: 35

Stage: 36

Stage: 37

Stage: 38

Stage: 39

Stage: 40

Stage: 41

Stage: 42

How to operate: There are three electrical switches and three hydraulic circuits that control the excavator.

Two of the switches control the track of the excavator and make the machine mobile. The third switch rotates the excavator’s arm about the body.

Lesson to be learnt: Hydraulic System A hydraulic system is used where a large amount of force is required for doing some work. In such a case, speed is generally not an important factor as hydraulic systems are usually slow.

Hydraulics uses the principle of transferring a push or a pull through a medium which cannot be compressed (incompressible). In actual hydraulic systems, oils are used as the incompressible medium.

We will create our own hydraulic systems using syringes as piston-cyclinder assembly, and water as the incompressible fluid inside them.

The hydraulic system can be easily demonstrated by the following activity. 타 Take two 10ml syringes. Fill one syringe with water and connect it to the other syringe with the help of plastic tube. 타 Now place the syringes in each of your hands such that your right thumb is on one syringe and your left thumb is on the other. 타 When you Press the plunger/piston of one of the syringes you will find that the plunger/piston of the other syringe goes up.

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