WHEELS AND TYRES
FUNTION
OF WHEELS & TYRES
The
Wheel along with the tyre has to take the vehicle load, provide
a
cushioning effect and cope with the steering control. The wheel must
fulfill
the following requirements.
2. It
should be balanced both statically as well as dynamically.
3. It
should be lightest possible so that the unsprung weight is leat.
TYPES OF WHEELS:
2. Wire
Wheels ( Spoked Wheels)
3. Split
Wheels
4. Heavy
Vehicle wheels
1.
DISC WHEEL : This type
of wheel consists of a steel rim and a
pressed
steel disc. The rim is a rolled section, sometimes riveted but usually
welded
to the flange of the disc. The wheel assembly in bolted to the
brake
drum. There is a hole in the rim to accommodate the valve of tube.
This
type of wheel is most commonly used in Heavy motor vehicles.
2.
WIRE WHEELS : This type
of wheel consists of a separate hub
connected
to the rim with a number of wire spokes. The headed inner
ends of
spokes fit into the rim holes and tightened with tubular nuts. All
the
spokes centred at the hub.
3
SPLIT WHEEL: The split
wheel is made in the form of two dishes which
fit back-to-back
and are clamped by a separate outer ring of studs and
nuts.
4
HEAVY VEHICLE WHEELS :
These are of the same type of disc wheels
abut
thicker plates are used for making the rim.
RIMS:
The Wheel along with the tyre has to take the vehicle load, provide
a cushioning
effect and cope with the steering control.
The
wheel must fulfil the following requirements.
4. It
must be strong enough.
5. It
should be balanced both statically as well as dynamically.
6. It should be
lightest possible so that the unsprang weight is leat.
RIMS:
The
outer circular portion of the wheel on which the tyre in general .
1. DROP
CENTRE TYPE
2. FLAT
BASE TYPE
When the
center portion of the rim is rolled to a smaller diameter, it
is known as
Drop Centre rim.
The Flat
base rim has its center portion flat. One side of the rim is
removable
so that the tyre can be installed or removed without
stretching
the bead.
TYRES:
The tyre
is mounted on the wheel rim. It has to carry the vehicle
load and
provide a cushioning effect absorbing flexing actions. It must
produce
a minimum noise while running. It should have good grip while
accelerating
and braking the vehicle on both dry and wet roads. It
should
resist the tendency of over steer while cornering.
TYPES
OF TYRE:
The tyre
are mainly two types.
1.
TUBED TYRE: It is a
traditional tyre which encloses a tube in
which
air is fored to a hight pressure as a cushioning medium. The outer
portion
of the tyre which roll on the road in made of synthetic rubber
and is
called TREAD. The beads of tyre edges act as strong shoulders
which
fit to the wheel rim.
2.
TUBE LESS TYRE: Tube
less tyre does not enclosed the tube . The
air
under pressure is filled in the tyre itself. A Non –return valve is fitted to
the rim
through which the air is forced into the tyre.
TUBE:The tube which is made of rubber
moulding to conform the inner
shape of tyre.
Air is forced into the tube under pressure through a Non