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An overview of the car body.
The body shell can be divided into three types: non-load-bearing, semi-load-bearing and load-bearing (or full-loaded) according to the stress.
The non-load-bearing body is characterized by a flexible connection between the body and the frame by springs or rubber pads. In this case, the body installed on the frame has little effect on the reinforcement of the frame, and the car body only follows its own gravity, the gravity of the people and goods it loads, and the inertial force and air resistance caused by it when the car is running. The frame, on the other hand, is subjected to the gravitational forces of the engine and chassis components, the forces transmitted by the brackets when these parts work, and the road surface through the wheels and suspension when the car is moving
force (the last item has the greatest impact on the frame or body).
The semi-load-bearing body is characterized by the rigid connection between the body and the frame by means of screwing, riveting or welding. In this case, in addition to bearing the above-mentioned loads, the automobile body also helps to strengthen the frame to a certain extent and share part of the load of the frame.
The load-bearing body is characterized by the fact that the car does not have a frame, and the body serves as the basis for the installation of the engine and chassis assemblies. In this case, all of the above loads are borne by the car body.
In order to reduce the vehicle quality and save materials of the car, most of the intermediate, ordinary, mini car and some passenger car bodies often adopt load-bearing structure. The truck cab occupies only a small part of the length of the car, and it is not possible to adopt a load-bearing structure.
It is also difficult to adopt a load-bearing structure for open bodies (convertibles) without a complete closed structure. In order to improve the comfort of the car, reduce the vibration transmitted by the engine and chassis assemblies during operation, and the impact transmitted from the road surface to the body through the wheels and suspension when the car is driving, the non-load-bearing structure can be adopted.
Passenger car bodies and truck cabs.
There is no obvious skeleton in the body of the car and the cab of the truck, but a spatial structure formed by the welding of external covering parts and internal sheet parts.
The ground sheet of load-bearing body has the longitudinal and transverse load-bearing elements that are relatively complete (thickness is also larger), and its front part has two longitudinal beams 11 with thicker cross-sectional dimensions, and they are often welded into a space frame with better rigidity with the front mud shield sheet 8 on both sides and the radiator fixing frame 9 in front, so as to directly install components such as engine and front suspension and bear its working load.
In contrast, non-load-bearing cars (as is also the case with long-head trucks) have a weaker front of the body, and the front sheet metal parts are usually not welded to the body shell, but are connected to each other with screws and mounted on the frame.
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Hello! This is Kia's introduction to the body in Chinese and English.
Here's a bi-reference resource on frames:
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