Chassis-car

7/30/2019 Chassis-car

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Chassis

A chassis consists of an internal framework that supports the

body of the car consisting of the frame (on which the body ismounted) with the wheels and machinery. It provides rigidity

to the car and without chassis the structure of the car is not

possible. It is the basic requirement to design the structure of

the car.

The frame - structural, load-carrying component

that supports the car's engine and body, which

are in turn supported by the suspension

The suspension system - setup that supports

weight, absorbs and dampens shock and helps

maintain tire contact



The steering system - mechanism that enables

the driver to guide and direct the vehicle

The tires and wheels - components that makevehicle motion possible by way of grip and/or

friction with the road

The chassis of the car should strong enough to

provide rigidity and stability to the car. A good

chassis should always fulfill theserequirements:-

1. The body should be light.

2. It should have minimum number of components.

3. It should provide sufficient space for passengers.

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 color.

8. It should have uniformly distributed load.

9. It should have long fatigue life



MONOCOQUE CHASSISIt is a historic design of the chassis which includes body on frame. The

frame should be heavy enough so as to provide rigidity and sufficient

resistance to forces.

Monocoque is a one piece structure which defines the final

shape of the car. Metal sheets are pressed with big stamping

machines. These parts are welded (normally spot welding) or

riveted together to conform the chassis. These chassis are fast

to make. Tolerances are tiny. Nowadays 99% of the productioncars use this type of chassis. They are heavy chassis because

they use a lot of metal. However, they have really good impact

strength. Normally steel is used, steel has 3 times the modulus

of Aluminum but only 2 times the weight, and is cheaper and

easier to weld.

Advantages: Space efficiency, because the chassis is the outer-shell of the car. Good for

mass production. Cheap to produce if in mass production. Inherent crash protection.

Disadvantages: Much, much heavier than other types of chassis. Low rigidity since the

pressed metal is not as stiff as tubular tubes. Impossible to produce if not in mass

production.

Who uses it: Almost all mass production cars.



Space frame chassis

Uses several small tubes to create a 3D chassis. Tubesare placed in several directions to cope with the forces

they need to withstand. Normally, these chassis are

designed for a purpose. These tubes are welded

together. To make the welding simpler square-section

tubes are also used (however, circular tubes provide the

maximum strength). They are normally used in sportapplications. Optimizing the design makes hard to put

openings (like doors).

Advantages: Very accurate. High stiffness. Great rigidity. You can select your materials

depending on the purpose.

Handmade. Tubes need to be cut, shaped, welded manually.

Who uses it: Some competition cars. Some sporty road cars use space frame design

in some parts of the chassis.



Tadpole and delta structure of car

A three-wheel car is, by design, basically a triangle shape. Depending on where thepassengers sit, the location of the engine, and the placement of other critical mechanical

components, this means the car either has two wheels up front and one in the rear or

two wheels in the rear and one up front. The engine can drive the single rear wheel or

the two rear wheels, and the steering can be done either way as well.

tadpole

deltaHaving one wheel up front and two in the back is known as the delta configuration.

The benefit to the delta setup is its inherent low cost. Most cars set up this way have the

engine driving the rear wheels and leave steering to the front one. It's relatively easy (and

inexpensive) to build a steering setup with only one wheel.

The second type of three-wheeler setup is called the tadpole or reverse

Tadpole designs are much more stable than the delta setup because the back wheel drives the

vehicle while the two wheels up front are responsible for steering. There's also an

aerodynamic benefit, since the vehicle is shaped almost like a teardrop .This allows air to flow

easily over the vehicle's bodywork.

Chassis-car

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