What is the rear bumper of a car
A rear bumper is a safety device located at the rear of a vehicle, mainly under the rear of the vehicle, and is made of plastic or metal material. Its main functions include:
Protect the rear of the vehicle : prevent damage to the rear of the vehicle caused by collision with other objects during driving .
absorb collision energy : when the vehicle rear-end collision occurs, the rear bumper can absorb part of the energy to reduce the injury of the occupants and the damage of the internal parts of the vehicle .
Decorative vehicle : its design is usually coordinated with the whole vehicle style to make the vehicle look more aesthetically .
Pedestrian protection : in the event of an accident, the rear bumper can reduce the injury to pedestrians .
Material and structure
Car rear bumpers are usually made of plastic and metal materials. The plastic bumper is composed of three parts: outer plate, buffer material and beam. It has the characteristics of lightweight and beautiful .
Metal materials such as steel plates were once widely used, but modern cars use more plastic materials to achieve better styling harmony and unity .
Historical development
Early car front and rear bumpers are mainly made of metal materials, the appearance is not beautiful and there is a certain gap with the body. With the development of the automobile industry and the application of engineering plastics, modern automobile bumpers not only maintain the original protection function, but also pursue harmony and unity with the body shape, and become more lightweight .
The main functions of the rear bumper of a car include the following aspects :
Buffer collision : The rear bumper can absorb and disperse the impact force when the vehicle crashes, reduce the impact on the vehicle structure and passengers, and reduce the degree of injury in the collision accident. Especially in the case of low-speed collisions or being hit by other vehicles while stopping, the rear bumper can effectively reduce the degree of damage and protect the safety of passengers.
Protect key parts : Rear bumper protects the key parts of the vehicle tail, such as the fuel tank, rear suspension system and rear lights, to prevent damage or leakage caused by external collision, and further reduce the risk of accidents.
Integrated safety system : The rear bumper of modern cars is usually integrated with equipment such as reverse radar, reverse camera and parking assist sensors. These safety systems provide detection and monitoring of the surrounding environment of the vehicle through the position of the rear bumper, helping the driver avoid collisions and misoperations, and improving driving safety.
aerodynamic action : A properly designed rear bumper can reduce the air resistance of the vehicle through modeling and aerodynamic principles, improve driving stability and fuel economy. This not only improves driving pleasure, but also reduces safety hazards at high speeds.
decorative function : as a part of the appearance of the vehicle, the rear bumper is decorative, which can improve the appearance of the vehicle and make it more beautiful.
The structural composition of the rear bumper : usually consists of an outer plate, a cushioning material and a cross beam. The outer plate and buffer material are made of plastic, while the beam is stamped into a U-shaped groove with cold-rolled sheet, and the outer plate and buffer material are attached to the beam.
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