Foam energy absorption structure of automobile bumper
By adopting multi -layer composite design and shape optimization in the car bumper, combined with the staggered placement of high -density and low -density foam materials, and the design of front and rear arched frames, solve the single design in existing technologies and simply constructive stress concentrations caused by simple structures. The problem significantly improves the efficiency of energy absorption and the effectiveness of the protection of vehicles and pedestrians.
Patent Information
- Application Number
- CN202421220552.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing automobile bumper foam energy absorption technology has a single design and a simple structure, which is difficult to adapt to complex collision situations, resulting in concentrated stress, weakening the balance of energy absorption and overall protection efficiency, and affecting the safety of vehicles and pedestrians.
Design a car -bumper foam energy absorption structure, adopts multi -layer composite design and shape optimization. By opening the assembly port inside the bumper body, the partitions and partitions are set, and high -density and low -density foam materials are placed in staggered. Set the front arched frame and rear arched frame on both sides of the bumper body to disperse the collision force to avoid stress concentration.
Effectively improve the energy absorption efficiency and collision resistance of the bumper, enhance the effectiveness of the protection of vehicles and pedestrians, and achieve the optimal configuration of energy absorption.
Smart Images
Figure CN222408175U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile bumpers, in particular to a foam energy-absorbing structure of an automobile bumper. Background Art
[0002] With the rapid development of modern road traffic, automobile safety performance has increasingly become one of the core issues of concern to consumers and manufacturers. As the first protective barrier at the front and rear ends of vehicles, the energy absorption performance of automobile bumpers in collisions plays a vital role in reducing pedestrian injuries, protecting vehicle structures and reducing maintenance costs. In recent years, with the advancement of materials science and structural engineering, the application of lightweight and high energy absorption materials has gradually become a new trend in automobile bumper design. Among them, foam materials have become the key materials for improving the energy absorption structure of bumpers due to their excellent energy absorption performance, lightweight characteristics and good recovery.
[0003] The common problems with the foam energy-absorbing technology currently used in the field of automobile bumpers are the uniformity of design and the simplification of structure. It usually only relies on the combination of homogeneous foam materials and basic geometric shapes. It cannot effectively adapt to collision scenarios with complex angles and varying strengths. The bumper structure is prone to form stress concentration points in certain areas. Instead of being able to fully transform and disperse the impact force, it may aggravate local damage, affect the balance and integrity of the energy absorption effect, and reduce the effectiveness of protecting vehicles and pedestrians. Utility Model Content
[0004] The purpose of the utility model is to provide a car bumper foam energy absorption structure to solve the problem raised in the above background technology that the current car bumper foam energy absorption technology has a single design and a simple structure, is difficult to adapt to complex collision situations, causes stress concentration, weakens the balance of energy absorption and the overall protection effectiveness, and affects the safety of vehicles and pedestrians.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a foam energy absorption structure of a car bumper, comprising a mounting frame, a bumper body is provided at the outer end of the mounting frame, and the mounting frame and the bumper body are connected on both sides by telescopic columns, an assembly opening is opened inside the bumper body, a plurality of spacers are evenly arranged inside the assembly opening, and each space separated by the spacers from the assembly opening is provided with a partition, high-density foam material and low-density foam material are respectively embedded on the front and rear sides of the partition, and a plurality of front arch frames and rear arch frames are respectively provided on the side of the mounting frame corresponding to the bumper body.
[0006] Preferably, the front arch frame is evenly fixed on the inner side of the bumper body, the rear arch frame is evenly fixed on the front side of the mounting frame, and the front arch frame and the rear arch frame are staggered and distributed.
[0007] Preferably, four front arch frames are provided on the back side of the bumper body, and the interior of the front arch frames is filled with medium-density foam material.
[0008] Preferably, a pressure column is movably inserted in the middle of the front end of the rear arch frame, and a tension spring is sleeved on the outside of one end of the pressure column located inside the rear arch frame.
[0009] Preferably, one end of the pressure column located inside the rear arch frame is provided with mutually hinged support rods, and the outer ends of the support rods are respectively hinged to the inner walls on both sides of the rear arch frame.
[0010] Preferably, the telescopic column is composed of a sleeve, a movable column and an elastic block, the sleeve is fixed on the mounting frame, the elastic block is arranged at the inner end of the sleeve, and the movable column is fixed on the inner side of the bumper body and forms a sliding connection with the sleeve.
[0011] Compared with the prior art, the utility model has the following beneficial effects: the automobile bumper foam energy absorption structure effectively avoids stress concentration during collision through unique multi-layer composite design and shape optimization, improves the energy absorption efficiency and collision resistance of the bumper, and enhances the effectiveness of protecting vehicles and pedestrians. The automobile bumper foam energy absorption structure opens an assembly port inside the bumper body, and the spacers and partitions arranged in the assembly port can alternately place high-density foam materials and low-density foam materials, so as to design the uneven density distribution of the foam materials according to the magnitude of the force borne by different areas of the bumper body during collision, thereby achieving the optimal configuration of energy absorption. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of a foam energy-absorbing structure of a car bumper of the utility model;
[0013] Figure 2 This is a schematic diagram of the telescopic column structure of a foam energy-absorbing structure of an automobile bumper of the utility model;
[0014] Figure 3 The utility model is a schematic diagram of the inner structure of a bumper body of a vehicle bumper foam energy absorption structure.
[0015] In the figure: 1. mounting frame; 2. bumper body; 3. telescopic column; 31. sleeve; 32. movable column; 33. elastic block; 4. assembly opening; 5. spacer block; 6. partition; 7. high-density foam material; 8. low-density foam material; 9. front arch frame; 10. rear arch frame; 11. pressure column; 12. tension spring; 13. support rod. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1-3The utility model provides a technical solution: a foam energy absorption structure of a car bumper, comprising a mounting frame 1, a bumper body 2 is arranged at the outer end of the mounting frame 1, the mounting frame 1 and the bumper body 2 are both made of metal, and the mounting frame 1 and the bumper body 2 are connected on both sides by telescopic columns 3, an assembly port 4 is opened inside the bumper body 2, a plurality of spacers 5 are evenly arranged inside the assembly port 4, and each space separated by the spacer 5 from the assembly port 4 is provided with a partition 6, the connection between the spacer 5, the partition 6 and the inner wall of the assembly port 4 is fixed by welding, and the front and rear sides of the partition 6 are respectively embedded with a high-density foam material 7 and a low-density foam material 8, and the side of the mounting frame 1 corresponding to the bumper body 2 is respectively provided with a plurality of front arch frames 9 and rear arch frames 9. The arch frame 10, the front arch frame 9 and the rear arch frame 10 are all made of elastic metal material. The bumper body 2 of this structure can be installed at a suitable position on the vehicle body through the mounting frame 1, and the high-density foam material 7 and the low-density foam material 8 can be alternately placed in the assembly port 4 through the spacer 5 and the partition 6. According to the magnitude of the force borne by different areas of the bumper body 2 during a collision, the density of the high-density foam material 7 is higher than that of the low-density foam material 8. The density distribution of the foam material is designed to be uneven, the high-density foam material 7 is used in the key force-bearing area, and the low-density foam material 8 is used in the non-key area, so as to achieve the optimal configuration of energy absorption, and when the bumper body 2 is subjected to a large impact force, the front arch frame 9 and the rear arch frame 10 will produce a certain degree of mutual extrusion, and the front arch frame 10 will be formed. The frame 9 and the rear arch frame 10 can disperse the collision force in different directions due to their special shapes, avoid stress concentration in a single direction, thereby effectively improving the energy absorption efficiency and collision resistance of the bumper body 2, and enhancing the effectiveness of protecting vehicles and pedestrians. The front arch frame 9 is evenly fixed on the inner side of the bumper body 2, and the rear arch frame 10 is evenly fixed on the front side of the mounting frame 1, and the front arch frame 9 and the rear arch frame 10 are mutually staggered. When the front arch frame 9 and the rear arch frame 10 of this structure are squeezed against each other, a certain staggering will occur to achieve the dispersion of collision force in different directions, forming a more effective buffering effect on the bumper body 2. The front arch frame 9 is provided with four on the back side of the bumper body 2, and the interior of the front arch frame 9 is filled with medium-density foam material. The medium-density foam The density of the foam material is between that of the high-density foam material 7 and that of the low-density foam material 8. The front arch frame 9 of this structure can improve its own elasticity through the internal medium-density foam material to further disperse the residual energy of the impact force. A pressure column 11 is movably inserted in the middle of the front end of the rear arch frame 10, and a tension spring 12 is sleeved on the outside of one end of the pressure column 11 located inside the rear arch frame 10. When the bumper body 2 of this structure is impacted and shrinks toward the rear side as a whole, its inner wall will contact the outer end of the pressure column 11. After the pressure column 11 is stressed, it will slide on the rear arch frame 10 and cause the tension spring 12 to pull. In this way, the pressure column 11 can also support the inner side of the bumper body 2 to a certain extent under the elastic force of the tension spring 12, and also buffer and decompose a part of the impact force received by the bumper body 2.When the bumper body 2 of this structure shrinks toward the rear side by an impact, the movable column 32 will be driven to move in the sleeve 31 and press the elastic block 33, so that the telescopic column 3 generates an elastic telescopic force, and a more effective buffering effect is achieved for the bumper body 2. ,
[0018] Working principle: When using the automobile bumper foam energy absorption structure, first install the bumper body 2 at a suitable position on the vehicle body through the mounting frame 1, and then alternately place high-density foam material 7 and low-density foam material 8 in the assembly opening 4 through the spacer 5 and the partition 6, that is, the high-density foam material 7 is used in the key stress-bearing area, and the low-density foam material 8 is used in the non-key area. When the bumper body 2 is accidentally impacted by the outside during use, the high-density foam material 7 and the low-density foam material 8 will first absorb most of the impact energy, and the front arch frame 9 and the rear arch frame 10 will produce a certain degree of The staggered extrusion can disperse the collision force in different directions. When the bumper body 2 as a whole is hit hard and shrinks to the rear side, its inner wall will contact the outer end of the pressure column 11. After the pressure column 11 is subjected to force, it will slide on the rear arch frame 10 and pull the tension spring 12. When the pressure column 11 shrinks inward, it will drive the support rod 13 to move, and when the bumper body 2 shrinks, it will also drive the movable column 32 to move inside the sleeve 31 and press the elastic block 33. In this way, the bumper body 2 as a whole will be buffered under multiple elastic forces, so that its energy absorption efficiency and collision resistance are better, thereby completing a series of tasks.
[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A foam energy absorption structure for a car bumper, comprising a mounting frame (1), a bumper body (2) being provided at the outer end of the mounting frame (1), and the mounting frame (1) and the bumper body (2) being connected at both sides by telescopic columns (3), characterized in that: The bumper body (2) is provided with an assembly opening (4) inside, a plurality of spacers (5) are evenly arranged inside the assembly opening (4), each space separated by the spacers (5) from the assembly opening (4) is provided with a partition (6), the front and rear sides of the partition (6) are respectively embedded with a high-density foam material (7) and a low-density foam material (8), and the side of the mounting frame (1) corresponding to the bumper body (2) is respectively provided with a plurality of front arch frames (9) and a rear arch frame (10).
2. The automobile bumper foam energy absorption structure according to claim 1, characterized in that: The front arch frame (9) is evenly fixed on the inner side of the bumper body (2), and the rear arch frame (10) is evenly fixed on the front side of the mounting frame (1), and the front arch frame (9) and the rear arch frame (10) are arranged in a staggered manner.
3. The automobile bumper foam energy absorption structure according to claim 2, characterized in that: Four front arch frames (9) are arranged on the back side of the bumper body (2), and the interior of the front arch frames (9) is filled with medium-density foam material.
4. The automobile bumper foam energy absorption structure according to claim 1, characterized in that: A pressure column (11) is movably inserted in the middle of the front end of the rear arch frame (10), and a tension spring (12) is sleeved on the outside of one end of the pressure column (11) located inside the rear arch frame (10).
5. The automobile bumper foam energy absorption structure according to claim 4, characterized in that: One end of the compression column (11) located inside the rear arch frame (10) is provided with mutually hinged support rods (13), and the outer ends of the support rods (13) are respectively hinged to the inner walls on both sides of the rear arch frame (10).
6. The automobile bumper foam energy absorption structure according to claim 1, characterized in that: The telescopic column (3) is composed of a sleeve (31), a movable column (32) and an elastic block (33); the sleeve (31) is fixed on the mounting frame (1); the elastic block (33) is arranged at the inner end of the sleeve (31); the movable column (32) is fixed on the inner side of the bumper body (2) and is slidably connected with the sleeve (31).