Types of Chassis frame

TYPES OF CHASSIS FRAMES:-
There are three types of frames:

1. Conventional frame
2. Integral frame
3. Semi-integral frame


1. Conventional frame: It has two long side members and 5 to 6 cross members joined together with the help of rivets and bolts. The frame sections are used generally.

a. Channel Section - Good resistance to bending
b. Tabular Section - Good resistance to Torsion
c. Box Section - Good resistance to both bending and Torsion


2. Integral Frame: This frame is used now a days in most of the cars. There is no frame and all the assembly units are attached to the body. All the functions of the frame carried out by the body itself. Due to elimination of long frame it is cheaper and due to less weight most economical also. Only disadvantage is repairing is difficult.


3. Semi - Integral Frame: In some vehicles half frame is fixed in the front end on which engine gear box and front suspension is mounted. It has the advantage when the vehicle is met with accident the front frame can be taken easily to replace the damaged chassis frame. This type of frame is used in FIAT cars and some of the European and American cars.


VARIOUS LOADS ACTING ON THE FRAME:-
Various loads acting on the frame are:

1. Short duration Load - While crossing a broken patch.

2. Momentary duration Load - While taking a curve.
3. Impact Loads - Due to the collision of the vehicle.
4. Inertia Load - While applying brakes.
5. Static Loads - Loads due to chassis parts.
6. Over Loads - Beyond Design capacity.


STATE THE DIFFERENT BODIES USED IN AUTOMOBILES:-
The Automobile bodies are divided in two groups:

A:  Passenger body
B:  Commercial body



According to Chassis design the body can divided into:
1. Conventional Type
2. Integral Type
3. Semi- Integral Type

According to other usage:
1. Light vehicle Bodies - cars, jeeps
2. Heavy vehicle Bodies - busses, lorries
3. Medium vehicle Bodies - vans, metadoors


REQUIREMENTS OF BODIES FOR VARIOUS TYPES OF VEHICLE:-
The body of the most vehicle should fulfill the following requirements:

1. The body should be light.
2. It should have minimum number of components.
3. It should provide sufficient space for passengers and luggage.
4. It should withstand vibrations while in motion.
5. It should offer minimum resistance to air.
6. It should be cheap and easy in manufacturing.
7. It should be attractive in shape and colour.
8. It should have uniformly distributed load.
9. It should have long fatigue life.
10.It should provide good vision and ventilation.