What is the rear bumper assembly of a car
The rear anti-collision beam assembly is a safety device installed at the rear of the vehicle, which is mainly used to absorb and disperse the impact energy in the event of a collision, so as to protect the safety of the occupants and reduce vehicle damage.
Structure and material
The rear anti-collision beam assembly is usually made of high-strength steel or aluminum alloy, which has high strength and impact resistance. The utility model comprises a main beam, an energy absorption box and a mounting plate connecting the car. The main beam and the energy absorption box can effectively absorb the impact energy during low-speed collisions, reducing the damage to the body stringer .
Working principle
When a vehicle crashes, the rear anti-collision beam first bears the impact force and absorbs and disperses the collision energy through its own structural deformation. It transmits the impact force to other parts of the body, such as the longitudinal beam, thereby reducing the damage to the main structure of the body. This design disperses energy during high-speed crashes, mitigating the impact on passengers in the vehicle and protecting passenger safety .
The role of different accident scenarios
low-speed collision : in low-speed collision, such as rear-end collision accident on urban roads, the rear anti-collision beam can directly bear the impact force to avoid the important parts of the vehicle such as radiator, condenser and so on being damaged. Its deformation can absorb part of the collision energy, reduce the impact on the body structure, reduce maintenance costs .
high-speed collision : in high-speed collision, although the rear anti-collision beam can not completely prevent the damage of the vehicle, it can disperse part of the energy along the body structure, slow down the impact on the passengers in the car, protect the safety of passengers .
side collision : although there is generally no special anti-collision beam on the side of the car, the reinforcing ribs inside the door and the B-pillar of the body can work together to resist the side impact, prevent excessive deformation of the door, and protect the passengers .
The main role of the rear anti-collision beam assembly of the car includes the following aspects :
Absorb and disperse impact energy : When the rear anti-collision beam is impacted at the rear of the vehicle, it can absorb and disperse the impact energy to reduce the damage to the rear structure of the vehicle. It absorbs the collision energy through its own deformation, thereby protecting the structural integrity of the body and the safety of the passengers .
Protecting body structure and passenger safety : The rear anti-collision beam is installed in the key parts of the rear of the vehicle, such as the rear of the vehicle or the frame, which can protect the body structure from serious damage in the collision and reduce the injury to passengers. It can reduce the cost and difficulty of maintenance when the vehicle is rear-ended .
comply with the regulatory requirements : in the case of low-speed collision, the rear anti-collision beam needs to meet the specific regulatory requirements, such as the forward impact speed of 4km/h and the Angle impact speed of 2.5km/h, to ensure that the lighting, fuel cooling and other systems work normally .
Material of choice : Rear fender beams are usually made of high-strength steel or aluminum alloy. The selection of materials requires consideration of cost, weight and process factors. Although the cost of aluminum alloy material is higher, its weight is lighter, which is conducive to reducing the overall weight of the vehicle and improving fuel economy .
The working principle of the rear anti-collision beam : when the vehicle has a collision, the rear anti-collision beam first bears the impact force, absorbs energy through its own deformation, and then transfers the impact force to other parts of the body (such as the longitudinal beam) to further disperse and absorb energy, reduce the damage to the body structure and the injury to the passengers .
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