Body structure
The body structure refers to the arrangement form of each part of the body as a whole and the way of assembly between the parts. According to the way the body bears the load, the body structure can be divided into three types: non-bearing type, bearing type and semi-bearing type.
Non-bearing body
The car with non-bearing body has a rigid frame, also known as the chassis beam frame. The connection between the frame and the body is flexibly connected by springs or rubber pads. The engine, a part of the drive train, the body and other assembly components are fixed on the frame with the suspension device, and the frame is connected to the wheel through the front and rear suspension device. This kind of non-bearing body is relatively heavy, large mass, high height, generally used in trucks, buses and off-road jeeps, there are also a small number of senior cars used, because it has better stability and safety. The advantage is that the vibration of the frame is transmitted to the body through the elastic elements, so most of it can be weakened or eliminated, so the noise in the box is small, the body deformation is small, and the frame can absorb most of the impact energy when the collision occurs, which can improve the safety of the occupant; When driving on a bad road, the frame protects the body. Easy to assemble.
The disadvantage is that the frame quality is large, the car's center of mass is high, it is inconvenient to get on and off, the frame manufacturing workload is large, the process accuracy is high, and large equipment needs to be used to increase investment.
Load-bearing body
The car with the load-bearing body has no rigid frame, but only strengthens the front, side wall, rear, bottom plate and other parts, the engine, front and rear suspension, a part of the drive train and other assembly parts are assembled in the position required by the design of the car body, and the body load is passed to the wheel through the suspension device. In addition to its inherent loading function, this kind of load-bearing body also directly bears the action of various load forces. After decades of development and improvement, the load-bearing body has been greatly improved in both safety and stability, with small quality, low height, no suspension device, easy assembly and other advantages, so most of the car adopts this body structure.
Its advantages are that it has a high anti-bending and anti-torsional stiffness, its own weight is light, and it can use the space in the passenger car more effectively.
The disadvantage is that because the drive train and suspension are directly installed on the body, the road load and vibration are directly transmitted to the body, so effective sound insulation and vibration prevention measures must be taken, and it is difficult to repair the body when it is damaged, and the corrosion prevention requirements of the body are high.
Semi-bearing body
The body and frame are rigidly connected by screw connection, riveting or welding. In this case, in addition to bearing the above loads, the car body also helps to strengthen the frame to a certain extent and share part of the load of the frame.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAUXS auto parts welcome to buy.
