How the steering system works (Car Part 3) Rack and pinion - Power steering - Wheels and rolling

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What happens when we turn the steering wheel of our car? Let’s find it out in this video, in which
we explain the steering system’s functions.
What’s fascinating in cars is that when we turn the front wheels, all the vehicle will turn in that
direction. But why does the car follow a precise curve after steering instead of proceeding in a
straight line? To find the answer to this question we need to know the physics of the wheel, one of
the greatest inventions in human history.
The speed of an impeccably rolling wheel at the contact point should always be zero. This will
guarantee that there won’t be any slippage between the stationary road and the wheel at the
contact point. The moving wheel can have zero velocity at a point in its surface because it has two
sorts of movement: it moves, indeed, in the trajectory of the car and it also rotates along its axis.
When we sum these two factors at the bottom of the wheel we can point out that they are in
opposite directions and they reset each other results. This elementary rule is essential to
comprehend the steering mechanism.
Considering also that, even after the wheel turns, the car keeps on moving straightaway.
Therefore, if we checked the translational and rotational velocities at the contact point of the
wheel, we would notice that the rotational velocity situation is inclined; but, on the other hand,
the translational velocity is straight. Thanks to this fact, the velocities do not reset each other
value, and this will make the car skid. The only way to succeed in achieving the zero velocity
condition is to grant that the translational velocity is inclined as well.
This phenomenon takes place when the entire car turns with respect to a center point.
This is conceivable only in case the whole vehicle turns with respect to a center point. In this view,
this fact is accurately represented: all the wheels encounter the perfect settings of rolling. In
addition, another fundamental aspect to be addressed is that for this impeccable kind of turn, the
perpendicular lines from the front wheels should meet the real wheel axis at a mutual point. This
condition is the principle of steering. If you analyze, you will realize that the angles curved by the
left and right wheels are not equivalent.
What are the mechanism and outcomes? In order to get the perfect steering, the left and right
wheels should turn at different angles. The steering mechanism is used to accomplish this scope.
The most ordinarily used steering mechanism in contemporary vehicles is the rack and pinion kind.
Let’s have a look at how this mechanism copes to steer the vehicle.
More than 10 years in industrial supplies have led JAES to become a qualified partner for some of the most
important automobile manufacturing companies, providing its technical support over a wide range of
industrial components, necessary during the production process of many types of vehicles.
A rack, which is at the midpoint of this mechanism, is constrained in order to only move along a
straight line. The steering pinion can urge this rack the movement of a part denominated a
steering arm, which is attached to both wheels. This section is limited in its movement and, in this
way, it only has a rotational motion along the axis. The steering arm is linked with the car frame
thanks to a roller bearing: this assures that it can only turn. A tie rod is the linkage between the
steering arm and the rack, and it can have both translational and rotational motion.
Let’s check what occurs to the wheels when the rack moves. You can observe that the left and
right wheels are turning at different angles.
If you monitor the meeting point of the left and right wheels, you can realize that the meeting
point always lies on the rear wheel line...

Видео How the steering system works (Car Part 3) Rack and pinion - Power steering - Wheels and rolling канала JAES Company