Automobile rear buffer beam
By introducing a dual airbag cushioning system into the rear buffer beam of the car and using airbags filled with inert gas for double cushioning, the problem of damage to the main beam caused by low-speed collisions is solved, thereby reducing maintenance costs and improving safety.
Patent Information
- Application Number
- CN202422924788.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing rear bumper beams of automobiles are easily damaged during low-speed collisions, resulting in high repair costs.
A rear buffer beam for automobiles is designed, which adopts a dual airbag buffer system. A first airbag and a second airbag filled with inert gas are connected by an air pipe, and a guide rod and a limit nut structure are constructed between the movable plate and the main beam to achieve double buffering to reduce the damage to the main beam caused by impact force.
Effectively reduce the damage to the main beam caused by low-speed collisions, reduce maintenance costs, and avoid the risk of gas explosions.
Smart Images
Figure CN223478986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts, specifically to a rear buffer beam for automobiles. Background Technology
[0002] The rear bumper beam, also known as the rear anti-collision beam, is a device used to absorb collision energy when a vehicle is involved in a collision. It consists of a main beam, an energy-absorbing box, and a mounting plate that connects to the vehicle. Both the main beam and the energy-absorbing box can effectively absorb collision energy in the event of a low-speed collision, minimizing the damage to the longitudinal beams of the vehicle body. This is how it protects the vehicle. However, even low-speed collisions can damage the main beam, requiring replacement or repair, which is costly. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology.
[0004] This invention provides a rear bumper beam for automobiles to prevent and reduce damage to the main beam caused by low-speed collisions, thereby reducing maintenance costs.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a rear buffer beam for automobiles, including a main beam, with energy-absorbing boxes linked on both sides of the main beam, and each energy-absorbing box having a mounting plate for connection with the vehicle body. The main beam has a movable plate that can move back and forth at one end relative to the energy-absorbing box. A first airbag is located on one side of the movable plate relative to the main beam, and a second airbag is located between the movable plate and the main beam. The first and second airbags are connected by an air pipe that passes through the movable plate. Both the first and second airbags are filled with gas, and the gas filling in both airbags has a reserve capacity.
[0006] A further feature of this invention is that the gas filled in the first airbag and the second airbag is an inert gas.
[0007] A further feature of this invention is that: the movable plate is provided with guide rods on the side facing the main beam; the main beam is provided with guide holes for connecting the guide rods to each guide rod; each guide rod is movably inserted into the corresponding guide hole; and the guide rod is provided with a limiting nut on the side of the main beam where the energy-absorbing box is located.
[0008] A further feature of this invention is that both the first airbag and the second airbag are fixedly connected to the movable plate.
[0009] The present invention, which has the above-mentioned features, is as follows: When subjected to a low-speed impact, the first airbag receives the impact force first. The impact force compresses the gas in the first airbag and causes it to flow to the second airbag. At the same time, the movable plate moves towards the main beam to buffer the impact. At this time, the second airbag inflates and comes into contact with the main beam. The movable plate and the main beam compress the second airbag, causing it to return to the first airbag for buffering. This double buffering and force relief reduces the damage to the main beam caused by the impact. The gas used is an inert gas to avoid the risk of explosion due to gas compression.
[0010] The beneficial effects of this utility model are: avoiding and reducing damage to the main beam caused by low-speed collisions, and reducing maintenance costs.
[0011] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0012] Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present utility model. Detailed Implementation
[0013] like Figure 1 A rear bumper beam for automobiles includes a main beam 1. Energy-absorbing boxes 2 are linked on both sides of the main beam 1. Each energy-absorbing box 2 has a mounting plate 3 for connection to the vehicle body. A movable plate 4, capable of moving back and forth, is located at one end of the main beam 1 opposite to the energy-absorbing box 2. A first airbag 5 is located on one side of the movable plate 4 opposite to the main beam 1. A second airbag 6 is located between the movable plate 4 and the main beam 1. The first airbag 5 and the second airbag 6 are connected by air pipes 7, which pass through the movable plate 4. Multiple air pipes 7 are provided; in this embodiment, five are provided. The first airbag... The first airbag 5 and the second airbag 6 are filled with gas, and the gas filling of the first airbag 5 and the second airbag 6 has a reserve. The gas filled in the first airbag 5 and the second airbag 6 is an inert gas. The movable plate 4 is provided with guide rods 8 on the side of the main beam 1. The main beam 1 has guide holes 9 for connecting the guide rods 8 to each guide rod 8. Each guide rod 8 is movably inserted into the corresponding guide hole 9. The guide rod 8 is provided with a limiting nut 10 on the side of the main beam 1 where the energy absorption box 2 is located. The first airbag 5 and the second airbag 6 are both fixedly connected to the movable plate.
[0014] When subjected to a low-speed impact, the first airbag 5 receives the impact force first. The impact force compresses the gas inside the first airbag 5 and flows to the second airbag 6. Meanwhile, the movable plate 4 moves towards the main beam 1 to buffer the impact. At this time, the second airbag 6 inflates and comes into contact with the main beam 1. The movable plate 4 and the main beam 1 compress the second airbag 6, causing it to return to the first airbag 5 for further buffering. This double buffering and force relief reduces the damage to the main beam 1 caused by the impact. Inert gas is used to avoid the risk of explosion due to gas compression.
Claims
1. A rear buffer beam for automobiles, comprising a main beam, wherein energy-absorbing boxes are linked on the same side at both ends of the main beam, and each energy-absorbing box is provided with a mounting plate for connection to the vehicle body, characterized in that: The main beam is provided with a movable plate that can move back and forth at one end relative to the energy absorption box. The movable plate is provided with a first airbag on one side of the main beam. A second airbag is provided between the movable plate and the main beam. The first airbag and the second airbag are connected by an air pipe that passes through the movable plate. The first airbag and the second airbag are filled with gas, and the gas filling of the first airbag and the second airbag has a reserve.
2. The rear buffer beam for automobiles according to claim 1, characterized in that: The first and second airbags are filled with inert gas.
3. The rear buffer beam for automobiles according to claim 1, characterized in that: The movable plate is provided with guide rods on the side of the main beam. The main beam has guide holes for connecting the guide rods to each guide rod. Each guide rod is movably inserted into the corresponding guide hole. The guide rod is provided with a limiting nut on the side of the main beam where the energy-absorbing box is located.
4. A rear bumper beam for automobiles according to claim 2, characterized in that: Both the first airbag and the second airbag are fixedly connected to the movable plate.