What is the rear bumper bracket of a car
The rear bumper bracket of a car is a key structural component that connects the rear bumper to the vehicle body. Its main functions are to support and fix the bumper, and at the same time, to disperse the impact force during a collision to protect the safety of the vehicle body.
Structural composition
It is usually composed of the support body, guiding mechanism and buffer device, and is made of high-strength steel or composite materials to ensure effective energy absorption in the event of a collision.
Location and Function
Youdaoplaceholder0 location : It is located at the bottom of the rear body of the vehicle, between the rear panel and the bumper.
Youdaoplaceholder0 function :
Support the bumper to ensure a stable connection with the vehicle body.
Absorb the impact energy during a collision to reduce damage to the vehicle body;
Protect the rear body structure from deformation or penetration.
Materials and Processes
More metal or composite materials are adopted to ensure that it can withstand impact while maintaining structural integrity in a collision.
The rear bumper bracket of a car is a key component that connects the vehicle body and the bumper. Its main functions include:
Support and protect the bumper
The bumper is fixed to the body sheet metal of the vehicle through the bracket body and the guiding mechanism, preventing the bumper from sagging or moving laterally and ensuring stability during daily driving.
Absorb collision energy
High-strength steel or composite materials are used to disperse the impact force through U-shaped grooves, limit protrusions and other structures in rear-end collisions, protecting key parts such as the trunk.
Enhance the rigidity of the vehicle body
The bracket is rigidly connected to the body sheet metal, enhancing the rear's impact resistance and preventing body deformation caused by jolts.
Assist in accident assessment
The degree of damage to the frame is often used as an important basis for judging the severity of an accident. Severe deformation may affect the overall structural stability of the vehicle.
For daily maintenance, it is recommended to regularly inspect the welding points of the brackets, press and test the looseness of the bumpers, and promptly address rust issues.
The main symptoms of faults in the rear bumper bracket of a car include abnormal noises, shaking, and unstable driving. Timely maintenance is necessary to avoid potential safety hazards.
Fault manifestation
Youdaoplaceholder0 Abnormal noise : An abnormal noise occurs at the rear of the vehicle as the speed increases, especially on bumpy roads or during acceleration.
Youdaoplaceholder0 shaking : Abnormal shaking occurs in the engine or vehicle body, especially when braking or accelerating sharply.
Youdaoplaceholder0 Unstable driving : The vehicle shakes or jolts while driving, affecting the stability of handling.
Youdaoplaceholder0 Abnormal fuel consumption : Due to the damage of the bracket, the running resistance of the engine increases, and the fuel consumption rises significantly.
Maintenance suggestions
Youdaoplaceholder0 Minor damage : Slight loosening or cracking can be attempted to be repaired by yourself, such as bonding with glue or correcting the deformed part.
Youdaoplaceholder0 Severe damage : Original factory or compatible parts need to be replaced. It is recommended to have the operation done at a professional repair shop to ensure installation accuracy.
Youdaoplaceholder0 Daily maintenance : Avoid violent rear collisions, and regularly check the connection status of the bracket and whether the fixing screws are loose.
How to determine if the rear bumper bracket of a car needs to be replaced?
Criteria for damage judgment
Youdaoplaceholder0 structural fracture
If the lifting lugs or fixed brackets near the wheel position of the rear bumper bracket are broken or have broken feet, the replacement standard has been reached. Replacement is required when the crack length exceeds 20 centimeters or the deformed area reaches one-third.
If key positions (such as the force-bearing points connecting the vehicle body or the bumper) show depressions, cracks or severe distortions, they must be replaced immediately.
The function affects
Damage to the bracket may cause abnormal noises, unstable driving or abnormally high fuel consumption of the vehicle (for example, in the case of Toyota Corolla, fuel consumption increased by 18% to 22%).
If the deformation of the bracket affects the installation accuracy of the bumper, resulting in uneven gaps or loosening, it needs to be replaced.
Detection method
Youdaoplaceholder0 visual and manual inspection
Youdaoplaceholder0 Observe cracks/deformations : Focus on checking whether there are cracks or bends at the connection between the bracket and the vehicle body, fixed codes and other parts.
Youdaoplaceholder0 shaking test : Manually shake the bumper. If the bracket is loose or accompanied by abnormal noise, the internal structure may have been damaged.
Youdaoplaceholder0 professional testing technology
Youdaoplaceholder0 three-coordinate measurement : Determine the degree of deformation by measuring the key dimensional deviations of the support (for example, the bending of the longitudinal beam of the frame should be ≤5mm).
Youdaoplaceholder0 Material analysis : The tensile strength of the metal support (≥150MPa) and salt spray corrosion (rust area <5% after 480 hours) need to be tested.
Vehicle model differences and tools
Youdaoplaceholder0 Material and structural differences
Youdaoplaceholder0 Toyota crown : lightweight aluminum alloy frame; Youdaoplaceholder0 Hongqi H5 adopts a dual design of high-strength aluminum alloy and plastic guard plate.
Youdaoplaceholder0 Audi Q3 : The shape of the tail lip affects the installation method of the bracket and needs to match the aerodynamic design.
Youdaoplaceholder0 special tools
Youdaoplaceholder0 inspection tool : For instance, the inspection tool for the rear spoiler bracket can quickly verify the accuracy of the workpiece.
Youdaoplaceholder0 four-wheel alignment instrument : assists in detecting the positioning parameters of the rear axle and indirectly reflects the status of the support.
Maintenance suggestions
Youdaoplaceholder0 Minor damage : You can try to correct the deformed part or reinforce the screws, but regular rechecks are required.
Youdaoplaceholder0 Severe damage : It is recommended to replace the original factory parts (for example, for fox, the rear bar needs to be removed for operation, with a tightening torque of 70N·m).
Professional institution testing : third-party institutions (such as the Beijing Inspection Institute) can provide comprehensive testing for material composition, tensile strength, etc.
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