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CHASSIS FABRICATION

The chassis has very minimal flex and is

very rigid. The chassis is hand worked in

a tincture shop and all the holes and the

spur clearance and starter box provisions

are drilled to match with the required

dimension to suit the layout of the car.

The following alterations are made on the

new chassis:

Added material for extra strengthat the corners ,

Bent sides which will act as a bumper in one way and also reduces the longitudinaltorsion.

For making a fabricated chassis various steps that are taken are:

1. Cutting and parting off: The chassis is cut to the required dimension with the helpof the readymade chassis

2. Drilling: The required holes for the mounting of the various components aremeasured and then drilled on to the chassis

3. Slot Drilling: The slots for the flywheel for starting and stopping the engine are alsoprovided. It is machined using a hand drill

4. The corner bends are provided in order to prevent the flexing and bending of themember

5. The slots are also given for the mounting of the servo motors in position.STEERING MECHANISM

The steering mechanism of an on-road vehicle is totally unique where we have to eliminate

all the ball and socket joints in order to make the mechanism as well as the fabrication part a

bit simpler.

The challenge here is to eliminate all the

joints with two or more degree of freedoms

and restrict it to one degree of freedom in two

directions. The idea is inspired from the

universal joint. Usually the joints are made of

plastics. The material selection is also a

challenging task since it has to have the

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strength and functionality as that of the readymade one.

5.1 Steering Link Design

The objective of the design is to eliminate the ball and socket joint. So the single member issplit into three different components. One is a rod with external threads. The other member is

to hold the joint and the third member will have one rotational degree of freedom.

STUD STEERING COMPONENTS

5.2 Steering Link Assembly

It bears some similarity with a universal joint but however the application part is new!!! The

brown member is a stud on which two brackets are screwed into. Then the green member is a

free to oscillate kind of member which will effectively allow both the degrees of freedom

that a ball and socket joint would do.

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Steering Mechanism Assembly

For example the member on the left is oscillating along the XX axis then the member on the

right will oscillate along the YY axis thus satisfying the conditions of a steering link.

The links shown here will be substituted insteadof the ball and socket joints. The small member

is the member that will move both in X and Y

directions and the bigger member is the

coupling member.

Courtesy:

http://www.meadinfo.org/