What is the middle body of the rear bumper of a car
The middle body of the rear bumper of the car is mainly composed of the following parts :
The foam or plastic buffer layer : This is an important part of the interior of the bumper, which effectively absorbs and disperses the energy generated during a collision, preventing other critical parts of the body from being damaged in a minor crash. This design not only improves vehicle safety, but also reduces maintenance costs .
metal anti-collision beam : This is the core structure of the bumper, mainly responsible for transferring the impact force from the bumper to the chassis of the vehicle. Through the reinforced elements of the chassis, the impact force is further dispersed, thus protecting the safety of the body and occupants .
reflectors : These small devices can significantly improve the visibility of vehicles at night or in low visibility environments, helping to prevent accidents and ensure driving safety. They are usually mounted on the edge or bottom of the bumper to enhance recognition at night .
car light mounting hole : used to fix the headlights or turn signals and other lamps, to ensure the correct installation and stability of the lamps, to ensure the lighting effect at night .
mounting holes and other accessories : These holes are used to connect radar, antenna and other components to increase the functionality of the vehicle. The design of the mounting holes ensures the stability and reliability of these accessories, thereby improving the overall performance of the vehicle .
The main role of the middle body of the rear bumper of the car includes the following aspects :
Absorb and disperse impact : the middle body of the rear bumper usually contains a foam or plastic buffer layer, which can effectively absorb and disperse the impact energy and protect the other parts of the body from damage in a minor collision .
transfer impact force : metal anti-collision beam is the core structure of the rear bumper, responsible for transferring the impact force to the chassis part of the vehicle, and further disperse the impact force through the strengthening members of the chassis, so as to protect the vehicle .
beautify the appearance : modern automobile bumper design pays attention to the harmony and unity with the body shape, not only has function, but also improves the overall beauty of the vehicle .
pedestrian protection : Some high-end models add buffer blocks and energy-absorbing materials under the bumper to reduce injuries to the lower leg of pedestrians in collisions .
multi-function integration : Modern car bumpers are also integrated with a variety of practical functions, such as reversing radar, camera, automatic parking assistance system sensor .
Through these functions, the middle body of the rear bumper of the car not only plays a protective role in the collision, but also improves the safety and convenience of the vehicle in daily use.
The main reasons for the failure of the middle body of the automobile rear bumper include design defects, manufacturing process problems, assembly process problems and temperature changes . To be specific:
design defects : There are structural problems in the bumper design of some models, such as unreasonable shape design or insufficient wall thickness, which may cause the bumper to crack during normal use .
manufacturing process issues : There may be defects in the manufacturing process, such as internal stresses during injection molding or problems with material uniformity, which can cause the bumper to crack during use .
assembly process problems : tolerances created in the manufacturing process may lead to strong internal stresses during assembly, which may cause bumper cracking .
temperature change : Extreme temperature changes may lead to changes in the physical properties of plastic bumpers, resulting in cracking .
In addition, some owners have also experienced a broken rear bumper buckle, although there is no obvious injury on the surface, but the internal buckle has been torn. This situation may be due to bumping into soft packaging objects during the driving process, although the outside is not damaged, but the inside is damaged .
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