What is the rear bumper of a car
Rear anti-collision beam
Definitions and core features
The rear bumper of a car (also known as the rear anti-collision beam) is an important component of the vehicle's exterior trim, located beneath the rear of the vehicle. Its main functions include:
Youdaoplaceholder0 Absorbing and mitigating external impact force : In the event of a collision at the rear of the vehicle, the impact energy is dispersed through material deformation or structural design to reduce direct damage to the vehicle body structure.
Youdaoplaceholder0 Protecting passenger safety : Reducing the energy transferred from a collision into the vehicle to lower the risk of injury to occupants.
Youdaoplaceholder0 In harmony with the body shape : Modern bumpers are both aesthetically pleasing and need to be in harmony with the body design.
Materials and Structures
Youdaoplaceholder0 Material evolution : In the early days, it was mostly metals (such as steel plate pressed channel steel), but now the mainstream is engineering plastics (such as polypropylene), taking into account both lightweight and energy absorption requirements.
Youdaoplaceholder0 Typical structure : mostly consists of three parts:
Youdaoplaceholder0 Outer plate (plastic housing, responsible for appearance and primary buffering)
Youdaoplaceholder0 Cushioning material (such as foam or honeycomb structure, further absorbing energy)
Youdaoplaceholder0 Crossbeam (metal U-shaped groove, providing rigid support).
The difference from other parts
Youdaoplaceholder0 and anti-collision beam relationship : Some literature interchangeably uses the term "rear bumper" with "rear anti-collision beam", but strictly speaking, the anti-collision beam is a metal crossbeam inside the bumper and is part of its structural components.
Youdaoplaceholder0 Compared with the front bumper : The two have similar functions, but due to the difference in collision probability, the rear bumper may simplify the material or structure (such as omitting some buffer layers).
Youdaoplaceholder0 Maintenance and replacement notes
Youdaoplaceholder0 Plastic properties : Plastic bumpers are prone to scratches or cracking, but their repair costs are usually lower than those of metal.
Youdaoplaceholder0 Safety standard : When replacing, ensure that the new component complies with the original factory energy absorption standard to avoid degradation of protective performance.
Youdaoplaceholder0 The main functions of a car rear bumper include the following aspects :
Youdaoplaceholder0 Protect the rear of the vehicle : The rear bumper can prevent the rear of the vehicle from directly colliding with other objects and causing damage, providing basic protection .
Youdaoplaceholder0 Absorbing collision energy : In a rear-end collision, the rear bumper is the first to bear the impact force, absorbing some of the energy and reducing the risk of injury to occupants and damage to internal components .
Youdaoplaceholder0 Disperse impact force : The rear bumper conducts the impact force to the energy-absorbing boxes on both sides and the rear longitudinal beam, and then transmits it to other structures of the vehicle body, serving to disperse and buffer the force .
Youdaoplaceholder0 Aesthetics : The design of the rear bumper is usually in harmony with the overall style of the vehicle, enhancing the overall aesthetics of the vehicle .
Youdaoplaceholder0 Safety protection : The rear bumper not only protects the vehicle body from excessive impact force damage, but also protects the occupants from excessive injury, and pedestrian protection is also taken into account in the design .
Youdaoplaceholder0 The structural composition of the rear bumper includes the outer plate, cushioning material and crossbeam. The outer plate and cushioning materials are mostly made of lightweight plastics such as polyester and polypropylene, which have good toughness and impact resistance. The crossbeam is a cold-rolled sheet formed into a U-shaped groove, which provides the basic structural support and connects the outer sheet, buffer material to the frame longitudinal beam .
Youdaoplaceholder0 Rear bumper faults of automobiles mainly include problems such as local deformation and cracks. These problems are usually caused by improper installation or environmental factors (such as excessive sunlight exposure).
Cause of failure
Youdaoplaceholder0 Improper installation : If the gap adjustment of the bumper is not consistent during installation, it may cause dimensional expansion at the corner positions to release insufficient space, resulting in local deformation after exposure to sunlight.
Youdaoplaceholder0 Sun exposure : Prolonged sun exposure can cause the bumper material to expand. If insufficient space is reserved during installation, it may lead to local deformation .
Fault manifestation
Youdaoplaceholder0 Local deformation : The bumper may bulge or dent locally after exposure to direct sunlight.
Youdaoplaceholder0 Cracks : The bumper may develop cracks due to external impact or prolonged use, affecting appearance and safety .
Solution method
Youdaoplaceholder0 Free repair : If you encounter any of the above issues, you can contact your car manufacturer or an authorized service center. Xiaomi Auto Official provides free pick-up and repair service for about 1 hour .
Youdaoplaceholder0 Professional repair : For minor cracks or deformations, they can be repaired at a professional auto repair shop, including methods such as polishing and applying repair agents .
If the crack is severe or safety concerns, a bumper replacement may be required.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&750 auto parts welcome to buy.
