People rely on clothes to wear vehicles also rely on the car, generally bright appearance is always the most likely to attract our attention, and people often overlook the important beautiful appearance under the "skeleton", because it is the key to protect the occupants. Do you know what the structure of the car body is?
Which car is a hatchback? Sedan?
In daily life, we often hear the words hatchback and sedan. How do they divide it? Usually we call the car's engine room, cab, and trunk as the "cars" of cars. Sedan cars are independent and are called sedan cars. If the cab and trunk are combined, they are called hatchbacks.
Body specifications
When you buy a car to understand the space of a car, of course, depends on the total length of the car, wheelbase and other parameters. Nowadays, the car manufacturers' specifications for car body specifications are basically unified, such as the total length of the car body, wheelbase, track distance, front suspension, rear suspension, etc. Some parameters such as total body width and total height will be slightly different.
Car pass performance indicators
When you learn about an off-road vehicle (zone), you will often see a series of parameters such as maximum climbing, maximum roll angle, minimum ground clearance, and so on. Below we use diagrams to visualize the meaning of these parameters.
What is a non-loaded body?
In non-load-car body vehicles, the engine, transmission system, and body parts are fixed on a rigid frame that is connected to the wheels through front and rear suspensions.
The non-loaded body has a large girder that runs through the entire body structure. The strength of the chassis is high and the bump resistance is good. Even if the four wheels of the car are subjected to uneven forces, they are carried by the frame and are not transmitted to the body, so the body is not easily distorted.
Non-loaded bodies are relatively heavy, heavy, and high in height, and are used in trucks, buses, and off-road vehicles. However, some limousines are also used due to the non-bearing body with better stability and safety.
Car body
The entire body of the car body with a load-bearing body is an integral body. There is no integral girder. The engine, transmission system, front and rear suspension components are all assembled to the body, and the body load is transmitted to the wheels through the suspension device.
The car with a load-bearing body is smooth on the straight road, has a low natural frequency, low noise and light weight, and is widely used in cars. Of course, the strength of the chassis is less than that of a non-loaded body with a girder structure. When the four wheels of the car are not stressed uniformly, the body will be deformed.
Body must use different materials
Not all the material strength of the body is better, depending on where it is used. Such as the frame of the driving room (such as beams, longitudinal beams, ABC columns, etc.), in order to make the space of the driving room as far as possible without deformation (to ensure the safety of occupants), we must use high-strength materials. For example, front and rear materials (such as engine covers, fenders, etc.), in order to absorb the impact force, can use relatively low-strength materials.
What is the role of door anti-collision beams?
The door anti-collision beam is the most important line of defense to reduce the side impact of the occupants. Because in the side impact, the occupant's body and the door do not have too much space as a buffer (different frontal impact, there is a certain space in front of the occupants in front of the buffer), will directly receive external forces. Therefore, the higher the strength of the crash beam, the better the protection of the occupants.
What is the body momentum transfer?
The same is done to protect the people in the driving room. When the car is hit, the specially designed vehicle body is used to disperse and transfer the impact force, thereby reducing the impact force transmitted to the driving room and protecting the occupants of the vehicle.
What is collapsing energy?
In car collisions, it is important to protect the safety of people in the car, so the smaller the deformation of the cab in the collision, the better. Cars take this into account when designing, in the event of a car crash, some parts of the structure collapse and absorb a portion of the impact energy, thereby reducing the impact force transmitted to the cabin.
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