Why are the wheels round

Why are the wheels roundYou may say that this is not an easy question, because round wheels are easy to roll!

The round wheel can roll drippingly, which is just a superficial phenomenon, and we must grasp the essence of the circle, conduct a scientific analysis of the circle, and find out the fundamental reason why the wheel is made into a circle.

What are the important properties of circles?

Let's start by looking at a circle drawn on the right. The outer circle is called the circumference, and the point where the compass is tied when the circle is drawn (now it is drawn as a black dot for easy seeing) is called the center of the circle. Let's take a ruler and measure the distance from any point in the circumference to the center of the circle, they are all equal.

This equal distance is called the radius. This is the importance of the circle.

If the wheel is made round and the axle is placed in the center of the circle, when the wheel rolls on the ground, the distance between the axle and the ground is always equal to the radius of the wheel. Therefore, the carriage mounted on the axle, and the people sitting in the carriage, will be smoothly pulled by the car. Suppose the wheel is broken, it is no longer round, and the rim is one piece higher and one piece lower, that is to say, the distance from the rim to the center of the wheel circle is not equal, then this kind of car must turn your head upside down.

Of course, there are other reasons why the wheels are round, for example: when something rolls on the ground, it is much less labor-saving than dragging on the ground, because the rolling friction resistance is smaller than the sliding friction resistance.

So, you must know why you use a compass when drawing circles. Because when the compass foot is opened, the distance between its feet is constant.

When did people come to know this property of the circle? Indeed, this was a long time ago. In the beginning, it was nature that inspired people to see how round the sun in the sky and the moon and a half moon were!

These objectively existing things give people the image of a circle. Gradually, the concept of a circle was born. People also began to learn to draw circles, but it was not easy to draw a very smooth circle.

After people knew that the distance from each point of the circle to a fixed point (circle center) was equal from production practice, they invented the compass to draw a circle.

Circles have the property that the distance from the center of the circle to any point in the circumference of the circle is equal, and this equal distance is called the radius. That is to say:

In the same circle, all the radii are equal. "So, people made the wheel round and made the axle pass through the center of the circle, and when the wheel rolled on the ground, the distance from the ground was always equal to the radius of the wheel. If the wheel is deformed, not round, and the distance from the rim to the center of the wheel is not equal, then this kind of car will definitely bump up and down, how can it move better?

Of course, the wheels are made round because the rolling friction is smaller than the sliding friction.

The distance from the point to the center of the circle is equal, and the radius of the wheel is always equal when the wheel is in motion. During driving, the round shape can reduce frictional resistance, and the axle rolls on the ground through the center of the circle, so that it will be more labor-saving to drive.

Because the wheels are easy to roll and balance.

The reason why the wheel shape is designed to be round is labor-saving and smooth.

Because the wheels are rounded, the frictional resistance can be reduced during the driving of the car, and the axle rolls on the ground through the center of the circle, so that the driving will be more stable.

When the wheel rotates, the distance between the axle and the ground is always equal to the radius of the wheel, so that the driving will be more stable, because the carriage is installed on the axle of the car, only when the wheel is in a state of smooth operation, the carriage will be more stable. The round wheels can reduce the friction with the ground during driving, improve acceleration, and also improve the work efficiency of the car.

The main functions of the wheel are:

1. Support the full weight of the vehicle and bear the load of the car.

2. Transmit the torque of traction and braking to ensure the adhesion between the wheels and the road surface.

3. Reduce and absorb the vibration and impact force of the car when driving, prevent the delay-resistant auto parts from being subjected to severe vibration and early damage, adapt to the high-speed performance of the vehicle and reduce the noise during driving, and ensure the safety, stability, comfort and energy-saving economy of driving.

A wheel is a rotating component that is subjected to a load between the tire and the axle, and is usually made up of two main components: the rim and spokes. The rim is the part that mounts and supports the tire on the wheel, and the spokes are the supporting part on the wheel that is between the axle and the rim. In addition to the above-mentioned parts, the wheel sometimes contains a hub.