What parts does the car chassis consist of?

There are three types: non-bearing, bearing and semi-bearing.

1, the non-loaded body has a rigid frame, also known as the chassis girder frame. The connection between the frame and the car body is flexible through springs or rubber pads. Some engine, transmission system, car body and other assembly parts are fixed on the frame with suspension devices, and the frame is connected with wheels through front and rear suspension devices.

2. The car with load-bearing body has no rigid frame, but only strengthens the front, side walls, rear, floor and other parts. The engine, front and rear suspensions, part of the transmission system and other assembly parts are assembled at the positions required by the design on the car body, and the load of the car body is transferred to the wheels through the suspension device.

3. Semi-bearing is a rigid connection between the car body and the frame by means of threaded connection, riveting or welding. In this case, the automobile body not only bears the above load, but also helps to strengthen the frame and share part of the load of the frame to some extent.

Extended data

Force on the frame:

Load bending

Literally, it is easy to understand this kind of pressure, that is, some cars in unsprung weight. Therefore, the longitudinal beams and members at the bottom of the frame generally require strong rigidity.

2) Non-horizontal distortion

When the front and rear diagonal wheels roll when they encounter unevenness on the road, the beams and columns of the frame will bear this longitudinal torque, which is just like twisting the plastic sheet into a spiral.

3）

Horizontal rhombic distortion

Because when the vehicle is driving, each wheel will bear different resistance and traction due to the difference of road surface and driving conditions (road pavement, bumps, obstacles, entrance and exit bends, etc.). ), which can make the frame push and pull or even deform in the horizontal direction. This situation is like pulling a rectangle into a diamond.

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