CHASSIS

GENERAL DEFINITION

• A chassis consists of an

internal framework that supports a man-

made object. It's analogous to

an animal's skeleton. An example of a

chassis is the under part of a motor

vehicle, consisting of the frame (on which

the body is mounted) with the wheels and

machinery.

THE REQUISITE DEFINITION

• The chassis is the backbone of the

ROBOT. Without a proper chassis the

robot is not fit for the tracks. Great

emphasis has to be laid on the design of a

structurally sound chassis design which

will not give in under the extreme

pressures an robot has to go through.

ME FIRST

• When you start with your robot , you ll

wonder …what first??

• Answer is very simple ….CHASSIS…since

chassis is the backbone as said , it has to

be defined and designed properly with

complete knowledge of strength of

materials and mechanical works.

TYPES OF CHASSIS

• Ladder Chassis

• Tubular Space Frame

• Monocoque

• ULSAB Monocoque

• Backbone Chassis

• The above mentioned types are types of

automotive chassis which correspond to

robot chassis because the robot we make

corresponds automobiles

• If we study this topic in depth …u ll see

that its all about creativity and thought

…….your mechanical imagination and

sense must be good enough .

• As the name suggests , it’s a chassis in form of a ladder. My suggestion is to use this if height of robot is over 700.

• In this--- two longitudinal rails interconnected by several lateral and cross braces. The longitude members are the main stress member. They deal with the load and also the longitudinal forces caused by acceleration and braking. The lateral and cross members provide resistance to lateral forces and further increase torsional rigidity.

LADDER CHASSIS

Tubular Space Frame

• Tubular space frame chassis employs dozens of circular-section tubes (some may use square-section tubes for easier connection to the body panels, though circular section provides the maximum strength) position in different directions to provide mechanical strength against forces from anywhere. These tubes are welded together and forms a very complex structure,

Monocoque

• monocoque is a one-piece structure which

defines the overall shape of the car.

• Its simple to build one and can be coupled

with a lot of things to increase its strength

• One of its main advantage is space

efficiency

ULSAB Monocoque

• This one is same as monocoque …ony

diffrence is that ere we use composite

materials instead of normal steel and all.

Backbone Chassis

• Backbone chassis is very simple: a strong

tubular backbone (usually in rectangular

section) connects the front and rear

motors and provides nearly all the

mechanical strength

• This one is strong for small robots

• One has to use glass fiber or PVC to make

that rectangular piece of backbone.

Suggestions

• WHAT WE SUGGEST IS LADDER ,

BACKBONE AND MONOCOQUE

CHASSIS

• Rest depends on your creativity and

thought process

Materials to be used

• Steel

• Aluminum

• Fe

• Composite metals

• Wood

• PVC

• Rubber

• Before selecting the material and forming

the design you must be aware of weight of

your motors and batteries …..as overall

weight of robot must be less even lesser

than the given limit.

• Your chassis must be strong not heavy.

• One can use strength of materials lab for

investigation n research.

Where to make one

• LABS are quite sufficient for fabricating

one

• Though one can take help from

professional workers available in markets.

How to make one

• The subject manufacturing process will

give you sufficient experience and

knowledge for fabrication , rest you can

consult senior team members for help

….and even your senior friend.

• With this I would like conclude the

presentation wishing all of you best of luck

for the event

Have fun

Thanks