Self-adaptive deformation guide structure of bumper buffering piece

Abstract

The utility model relates to the technical field of automobile bumpers, in particular to a self-adaptive deformation guide structure of a bumper buffer piece, which comprises a buffer base body, a plurality of guide grooves extending along the longitudinal direction are arranged in the buffer base body, deformation guide ribs are arranged among the guide grooves, stress dispersion columns are symmetrically arranged on two sides of the deformation guide ribs, and the stress dispersion columns are arranged on the buffer base body. A plurality of limiting bosses are arranged on the front end face of the buffer base body, positioning holes matched with a bumper beam are formed in the rear end of the buffer base body, and the guide grooves, the deformation guide ribs, the stress dispersion columns, the limiting bosses and the positioning holes are integrally formed in an EPP material to form a guide structure with the self-adaptive deformation capacity. When the self-adaptive deformation guide structure of the bumper buffering piece is impacted, materials can be guided to deform in order, stress is effectively dispersed, the energy absorption efficiency and the structural stability are improved, and therefore the safety performance of the buffering piece under different collision working conditions is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive bumper technology, specifically to an adaptive deformation guiding structure for a bumper buffer. Background Technology

[0002] In modern automotive design, bumper buffers serve as crucial safety components at the front or rear of a vehicle. Their primary function is to absorb impact energy during low-speed collisions, protect the vehicle's structural integrity, and enhance pedestrian protection. Currently, expanded polypropylene (EPP) foam is the most widely used material for these buffers. This material boasts excellent energy absorption capacity, resilience, and lightweight properties, making it widely applicable in various passenger vehicle models.

[0003] Existing bumper buffers mostly adopt homogeneous structures, such as integral block or honeycomb designs. Although they have energy absorption capacity to a certain extent, they lack an effective deformation guidance mechanism when subjected to impact. When faced with impacts from different directions or intensities, this structure is prone to local stress concentration, leading to premature failure of the buffer or a decrease in energy absorption efficiency, which affects the safety and crashworthiness of the entire vehicle. Utility Model Content

[0004] The purpose of this invention is to provide an adaptive deformation guiding structure for bumper buffer components, in order to solve the problems mentioned in the background art, such as the lack of an effective deformation guiding mechanism, easy stress concentration, low energy absorption efficiency, and premature failure of current bumper buffer components when subjected to impacts from different directions or intensities.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adaptive deformation guiding structure for a bumper buffer, comprising a buffer base, wherein the buffer base has multiple longitudinally extending guide grooves, deformation guiding ribs are provided between the guide grooves, stress dispersion columns are symmetrically provided on both sides of the deformation guiding ribs, the front end face of the buffer base has several limiting bosses, and the rear end of the buffer base has positioning holes that cooperate with the bumper crossbeam. The guide grooves, deformation guiding ribs, stress dispersion columns, limiting bosses and positioning holes are integrally formed in EPP material, constituting a guiding structure with adaptive deformation capability.

[0006] Preferably, the guide groove has a "V" shaped cross-section design, with the opening facing the direction of the force on the buffer component, and the guide groove is evenly distributed along the length of the buffer substrate.

[0007] Preferably, the deformable guide ribs have a wavy structure and are arranged at intervals between the guide grooves, and the top of the deformable guide ribs is provided with reinforcing ribs.

[0008] Preferably, the stress dispersion column has a conical structure and is embedded in the side groove of the deformation guide rib, and the surface of the stress dispersion column is provided with an annular groove.

[0009] Preferably, the limiting boss has a hemispherical structure and is distributed in the four corner areas at the front end of the buffer base, and the bottom of the limiting boss is provided with an elastic support.

[0010] Preferably, the positioning hole is a stepped through-hole structure that penetrates the rear end face of the buffer substrate, and the inner wall of the positioning hole is provided with anti-slip texture.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: the adaptive deformation guiding structure of this bumper buffer can guide the material to deform in an orderly manner when subjected to impact, effectively dispersing stress, improving energy absorption efficiency and structural stability, thereby improving the safety performance of the buffer under different collision conditions. This structure, through the cooperative design of the buffer base and guide groove, achieves a directional transmission path of impact energy. The deformation guiding ribs and stress dispersion pillars work together to enhance local compressive strength and avoid stress concentration. The limiting boss and positioning holes ensure the stability and connection reliability of the buffer in the assembled state. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the adaptive deformation guiding structure of a bumper buffer according to the present invention;

[0013] Figure 2 This is a schematic diagram of the front end structure of the buffer base of an adaptive deformation guiding structure for a bumper buffer according to the present invention.

[0014] Figure 3 This is a schematic diagram of the internal structure of the buffer base of the adaptive deformation guiding structure of the bumper buffer component according to the present invention.

[0015] In the figure: 1. Buffer base; 2. Guide groove; 3. Deformation guide rib; 4. Stress dispersion column; 5. Limiting boss; 6. Positioning hole; 7. Reinforcing rib; 8. Annular groove; 9. Elastic support part; 10. Anti-slip texture. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: an adaptive deformation guiding structure for a bumper buffer, comprising a buffer base 1, with multiple longitudinally extending guide grooves 2 inside the buffer base 1, deformation guiding ribs 3 between the guide grooves 2, stress dispersion columns 4 symmetrically arranged on both sides of the deformation guiding ribs 3, and several limiting bosses 5 on the front end face of the buffer base 1, and positioning holes 6 at the rear end of the buffer base 1 that cooperate with the bumper crossbeam. The guide grooves 2, deformation guiding ribs 3, stress dispersion columns 4, limiting bosses 5, and positioning holes 6 are integrally formed in EPP material, constituting a guiding structure with adaptive deformation capability. In this structure, the buffer base 1 acts as the main body to bear external impact force. When the guide grooves 2 are subjected to impacts of different directions or intensities, they first guide the deformation direction, causing the impact to be absorbed. Impact energy is transmitted along a preset path. The deformation guide rib 3 undergoes compressive deformation between the guide grooves 2, controlling the overall deformation trend of the buffer base 1 through its structural shape. The stress dispersion pillars 4 are distributed on both sides of the deformation guide rib 3, diffusing local stress outward during compression to avoid excessive energy concentration. The limiting boss 5 contacts and engages with the outer panel of the bumper in the assembled state, providing local support and limiting excessive displacement in the initial collision stage. The positioning hole 6 ensures a stable connection between the buffer component and the bumper beam, maintaining the relative position of the overall structure during deformation. All components are integrally molded from EPP material, achieving synergistic effects while ensuring lightweight and energy absorption capabilities. This allows the buffer base 1 to adaptively adjust its deformation mode when facing complex collision conditions. This design effectively avoids premature failure caused by localized stress concentration, thereby improving energy absorption efficiency and structural stability. It solves the problems of stress concentration, low energy absorption efficiency, and premature failure of buffer components under impact from different directions due to the lack of an effective deformation guidance mechanism in existing technologies. The guide groove 2 has a "V" shaped cross-section design, with its opening facing the direction of the buffer component's force. Furthermore, the guide groove 2 is evenly distributed along the length of the buffer base 1. This "V" shaped cross-section of the guide groove 2 preferentially guides the material to undergo compressive deformation along the groove opening direction, allowing energy to be transferred along a predetermined path and preventing disordered collapse. Simultaneously, the guide groove 2 makes the overall stress on the buffer base 1 more balanced, achieving a stable deformation mode under impact loads applied at different locations, thus improving energy absorption efficiency and structural stability. Consistency should be maintained. The depth and width of the guide groove 2 are optimized based on the typical collision angle of the vehicle's front bumper area to adapt to various impact scenarios. The deformable guide rib 3 has a wave-like structure, spaced apart along the guide grooves 2, and has a reinforcing rib 7 at its top. This wave-like shape of the deformable guide rib 3 provides multi-segment support and gradual collapse characteristics during compression, enabling the buffer base 1 to achieve more uniform and controllable deformation under forces in different directions. Simultaneously, its spaced arrangement between the guide grooves 2 effectively coordinates with the deformation path of the guide grooves 2, enhancing the overall structure's energy absorption capacity and directional adaptability. The reinforcing rib 7 further improves the structural strength of the deformable guide rib 3, preventing premature local fracture while ensuring guiding performance.This improves the stability and durability of the buffer substrate 1 under complex collision conditions. Meanwhile, the radius of curvature of the wave structure of the deformation guide rib 3 has been verified through finite element simulation, ensuring good mechanical response under different strain rates. The stress dispersion column 4 is a conical structure, embedded in the side groove of the deformation guide rib 3, and has an annular groove 8 on its surface. This conical design of the stress dispersion column 4 effectively diffuses locally concentrated stress outwards, preventing premature material failure or damage due to stress concentration. The layout of the stress dispersion column 4 embedded in the side groove of the deformation guide rib 3 allows it to work collaboratively when the deformation guide rib 3 undergoes compression deformation, further optimizing stress distribution. The annular groove 8 increases the contact area and friction between the stress dispersion column 4 and the surrounding material, helping to better control the deformation mode during compression and ensuring uniform energy distribution, thereby improving the overall energy absorption efficiency and structural stability of the buffer substrate 1. The limiting boss 5 has a hemispherical structure and is distributed on the buffer substrate 1. The front four corner areas, and the bottom of the limiting boss 5 is provided with elastic support parts 9. The hemispherical design of the limiting boss 5 can first contact and disperse the collision energy. Through its smooth surface, the impact force is evenly transmitted to the buffer base 1, reducing local stress concentration. The layout of the four corner areas at the front of the buffer base 1 ensures that it can provide effective initial support and energy dispersion in the case of multi-directional collisions. The elastic support parts 9 can provide additional buffering in the initial contact stage and allow a certain degree of elastic deformation to further absorb impact energy. The positioning hole 6 is a stepped through hole structure that penetrates the rear end face of the buffer base 1, and the inner wall of the positioning hole 6 is provided with anti-slip texture 10. The stepped through hole design of the positioning hole 6 allows it to adapt to different specifications of bumper beam installation structures, improving assembly flexibility and connection reliability. The anti-slip texture 10 enhances the friction between the positioning hole and the installation parts, preventing the buffer from loosening or shifting during the collision, thereby ensuring the overall structure's ability to work together during deformation.

[0018] Working principle: When using the adaptive deformation guide structure of this bumper buffer, the buffer base 1 is first installed on the bumper beam through the positioning hole 6. The stepped through hole structure of the positioning hole 6 cooperates with the anti-slip texture 10 to achieve stable assembly. When an external collision occurs, the limiting boss 5 first contacts the outer plate of the bumper and maintains its initial stable position. As the impact force gradually acts on the buffer base 1, the guide groove 2 begins to respond to the external force and guides the material to compress and deform along the "V" shaped cross section direction. At the same time, the deformation guide rib 3 undergoes gradual compression in a wave-like structure. The reinforcing rib 7 synchronously bears the stress change during the deformation process. The stress dispersion column 4 is embedded in the side groove of the deformation guide rib 3 and is compressed accordingly. Its conical structure and annular groove 8 work together to participate in local deformation control, thereby completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive deformation guiding structure for a bumper buffer, comprising a buffer base (1), characterized in that: The buffer substrate (1) has multiple longitudinally extending guide grooves (2) inside, and deformation guide ribs (3) are provided between the guide grooves (2). Stress dispersion columns (4) are symmetrically provided on both sides of the deformation guide ribs (3). The front end face of the buffer substrate (1) is provided with several limiting bosses (5). The rear end of the buffer substrate (1) is provided with positioning holes (6) that cooperate with the bumper beam. The guide grooves (2), deformation guide ribs (3), stress dispersion columns (4), limiting bosses (5) and positioning holes (6) are integrally formed in EPP material to form a guide structure with adaptive deformation capability.

2. The adaptive deformation guiding structure for a bumper buffer according to claim 1, characterized in that: The guide groove (2) is designed with a "V" shaped cross section, with the opening facing the direction of the force on the buffer component, and the guide groove (2) is evenly distributed along the length of the buffer base (1).

3. The adaptive deformation guiding structure for a bumper buffer according to claim 1, characterized in that: The deformable guide ribs (3) have a wave-like structure and are arranged at intervals between the guide grooves (2), and the top of the deformable guide ribs (3) is provided with reinforcing ribs (7).

4. The adaptive deformation guiding structure for a bumper buffer according to claim 1, characterized in that: The stress dispersion column (4) is a conical structure, embedded in the side groove of the deformation guide rib (3), and the surface of the stress dispersion column (4) is provided with an annular groove (8).

5. The adaptive deformation guiding structure for a bumper buffer according to claim 1, characterized in that: The limiting boss (5) has a hemispherical structure and is distributed in the four corner areas at the front end of the buffer base (1). The bottom of the limiting boss (5) is provided with an elastic support part (9).

6. The adaptive deformation guiding structure for a bumper buffer according to claim 1, characterized in that: The positioning hole (6) is a stepped through hole structure that penetrates the rear end face of the buffer substrate (1), and the inner wall of the positioning hole (6) is provided with anti-slip texture (10).

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