A lattice buffer structure

Abstract

The application discloses a grating buffering structure and belongs to the technical field of automobile accessories, which comprises a grating body, wherein the grating body is installed on a vehicle body through a connecting support, and the connecting support comprises upper, middle and lower fixing structures arranged in sequence from top to bottom; the upper fixing structure comprises a flange and an upper connecting support, and the flange is fixedly connected with the upper connecting support through bolts; the middle fixing structure comprises a clamping corner plate and a middle connecting support, and the clamping corner plate is embedded in the middle connecting support; and the lower fixing structure comprises a clamping plate and a lower connecting support, and the clamping plate is embedded in the lower connecting support. The upper fixing structure adopts a fixing mode to form better support, the middle fixing structure and the lower fixing structure are both embedded structures, good collapse performance can be realized, the injury value can be reduced, and the installation convenience during the test of the grating body is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile accessories, in particular to a grille buffer structure. Background Art

[0002] Pedestrian protection is a key verification project in vehicle passive safety. The grille area is a key component for pedestrian protection. Its structural rationality is of great help in protecting pedestrians' legs. It not only affects the safety of pedestrians' legs, but also affects the product's structural design, environmental component layout and other contents. It is a key verification project in the grille development process.

[0003] The front grille, a key front-end design element, is often defined by its form. Current styling trends feature sharp edges, varied surfaces, and a strong three-dimensional effect. This creates a significant difference in profile between the grille and front bumper, conflicting with the vertical, flat surface ideal for pedestrian protection. This can significantly impact the leg shape in GB 24550 testing or in real-world vehicle-to-pedestrian collision scenarios. Therefore, key focus areas in grille structural design include how to quickly achieve pedestrian protection targets and minimize leg impact damage through forward product structural optimization.

[0004] The grille's cross-section shows a convex bottom and concave top. According to pedestrian protection models, when impacted by a leg, the leg deforms significantly, resulting in significant leg damage. Furthermore, grilles are typically made of hard plastic, so deformation is minimal when impacted.

[0005] In addition, the structural feasibility of the product is confirmed through simulation during the structural design phase, while the pedestrian protection test of GB 24550 requires actual vehicle testing. Usually, there is a certain error in the data between simulation and actual vehicle testing. After the product mold is completed and mass production begins, how to optimize the actual vehicle test at the lowest cost and fastest response time also requires overall product planning to avoid changes that have too much impact on mold forming, life, and cost.

[0006] Based on the above, it is necessary to optimize the product's fixed structure. By optimizing the connection structure between the grille and the body-in-white, corresponding buffer energy-absorbing structures and collision hard points can be made to achieve the goal of reducing leg damage value. Summary of the Invention

[0007] In order to solve the problems that the current grille has a small deformation amount under impact, resulting in a large damage value, and the grille is complicated to install, the present invention provides a grille buffer structure.

[0008] The present invention is achieved through the following technical solutions:

[0009] A grille buffer structure includes a grille body, the grille body being detachably mounted on a vehicle body via a connecting bracket, the connecting bracket including an upper fixing structure, a middle fixing structure, and a lower fixing structure sequentially arranged from top to bottom;

[0010] The upper fixing structure is provided with at least two in the horizontal direction; the upper fixing structure comprises a flange connected to the grille body and an upper connecting bracket connected to the vehicle body, the flange and the upper connecting bracket are fixedly connected by bolts;

[0011] The central fixing structure is provided with at least two in the horizontal direction; the central fixing structure comprises a clip angle plate connected to the grille body and a central connecting bracket connected to the vehicle body, the clip angle plate is embedded in the central connecting bracket;

[0012] The lower fixing structure is provided with at least two in the horizontal direction; the lower fixing structure comprises a clamping plate connected to the grille body and a lower connecting bracket connected to the vehicle body, and the clamping plate is embedded in the lower connecting bracket.

[0013] In this case, the upper fixed structure adopts a fixed method to form a better support. The middle fixed structure and the lower fixed structure are both embedded structures, which can achieve good collapse performance, help reduce the damage value, and further help improve the installation convenience when testing the grille body.

[0014] A further improvement of the present invention is that the lower connecting bracket includes a tongue-pressing structure and a lower bracket profile, with the tongue-pressing structure and the lower bracket profile connected to the vehicle body at their ends facing the same direction. The tongue-pressing structure is generally wavy in shape. The top surface of the connecting plate is provided with a groove-shaped notch that engages with the trough of the tongue-pressing structure. The wavy tongue-pressing structure cooperates with the groove-shaped notch on the connecting plate to form a stop between the two components. When the grille body is impacted, the groove-shaped notch overcomes resistance and extends toward the vehicle body.

[0015] A further improvement of the present invention is that the tongue-pressing structure includes a first trough section, a first crest section, a second trough section, a second crest section, a third trough section, and a third crest section extending toward one side of the vehicle body. The distances between the first crest section, the second crest section, and the third crest section and the lower bracket profile are H2, H3, and H4, respectively, and the lengths of H2, H3, and H4 decrease in sequence. The gradual decrease in the lengths of H2, H3, and H4 helps to reduce the resistance that the clip plate must overcome when moving toward the vehicle side.

[0016] A further improvement of the present invention is that the end of the trough section facing away from the vehicle body is connected to an upwardly inclined guide arc 2. The guide arc 2 is used to guide the clamping plate to enter between the tongue pressing structure and the lower bracket profile.

[0017] A further improvement of the present invention is that the top surface of the aforementioned snap-in plate is provided with snap-in reinforcement ribs, two of which are provided, and the spacing between the two snap-in reinforcement ribs is equal to the width of the tongue-pressing structure. The two snap-in reinforcement ribs not only enhance the structural strength of the snap-in plate, but also cooperate with the tongue-pressing structure to prevent the tongue-pressing structure and the snap-in plate from lateral displacement and loss of mutual support.

[0018] A further improvement of the present invention is that a guide rib is provided between the two clamping reinforcement ribs, the top surface of the guide rib being inclined upwards towards the grille body, so as to form a guiding cooperation with the second guide arc and also enhance the structural strength of the clamping plate.

[0019] A further improvement of the present invention is that the end of the middle connecting bracket facing away from the vehicle body is provided with a Z-shaped notch corresponding to the angle plate. The angle plate can enter the Z-shaped notch after being impacted to form a collapse avoidance.

[0020] A further improvement of the present invention is that the end of the Z-shaped notch facing away from the vehicle body is connected to an upwardly inclined guide arc 1. The guide arc 1 forms a matching guide for the angle plate.

[0021] A further improvement of the present invention is that the aforementioned angle plate is provided with a reinforcing rib assembly, comprising an upper reinforcing rib and a lower reinforcing rib. The upper reinforcing rib is provided on the top surface of the angle plate, and the lower reinforcing rib is provided on the bottom surface of the angle plate. In the initial state, the distance between the free end of the angle plate and the inner end of the Z-shaped notch, closest to the vehicle body, is H1, and the distance between the end of the lower reinforcing rib facing away from the grille body and the corresponding central connecting bracket portion is H1, with H1 being 3 mm. When the grille body is impacted, the angle plate cooperates with the central fixing structure to provide a 3 mm collapse space for the grille body.

[0022] A further improvement of the present invention is that a circular hole that can be adapted to the bolt is provided on the flange, and a through hole that can correspond to the circular hole is provided on the upper connecting bracket.

[0023] It can be seen from the above technical solutions that the beneficial effects of the present invention are: this case adopts a fixed method through the upper fixed structure to form a better support, and the middle fixed structure and the lower fixed structure are both embedded structures, which can achieve good collapse performance, help to reduce the damage value, and further help to improve the installation convenience when testing the grille body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is an axial view of the buffer structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the upper and middle structures of the grille of the present invention.

[0027] Figure 3 Schematic diagram of the lower structure of the grille according to the present invention.

[0028] Figure 4 Schematic diagram of the bracket fixing structure of the present invention.

[0029] Figure 5 This is a cross-sectional view of the upper fixed structure of the present invention.

[0030] Figure 6 This is a cross-sectional view of the fixed structure of the present invention.

[0031] Figure 7 This is a cross-sectional view of the lower fixed structure of the present invention.

[0032] Figure 8 This is a schematic diagram of the lower leg impactor of the present invention.

[0033] In the accompanying drawings: 1. Grille body, 2. Connecting bracket, 2-1. Upper fixing structure, 2-2. Middle fixing structure, 2-3. Lower fixing structure, 3. Flanged edge, 4. Round hole, 5. Upper connecting bracket, 6. Bolt, 7. Leg-type impactor, 8. Angle plate, 9. Reinforcement rib assembly, 9-1. Upper reinforcement rib, 9-2. Lower reinforcement rib, 10. Middle connecting bracket, 11. Z-shaped notch, 12. Guide arc 1, 14. Snap-on plate, 15. Groove-shaped notch, 16. Snap-on reinforcement rib, 17. Guide rib, 18. Lower connecting bracket, 19. Tongue pressing structure, 19-1. Wave trough section 1, 19-2. Wave trough section 2, 19-3. Wave trough section 3, 20. Guide arc 2, 21. Lower bracket profile. DETAILED DESCRIPTION

[0034] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0035] like Figure 1-8As shown, the present invention discloses a grille buffer structure, including a grille body 1 made of ASA or ABS. The grille body 1 of this material has high hardness and better support. The grille body 1 is detachably mounted on the vehicle body in an inclined manner via a connecting bracket 2. The grille body 1 is tilted downward toward the side away from the vehicle body.

[0036] The connecting bracket 2 includes an upper fixing structure 2-1, a middle fixing structure 2-2 and a lower fixing structure 2-3 which are arranged in sequence from top to bottom.

[0037] The upper fixing structure 2-1 is provided with four in the horizontal direction; the upper fixing structure 2-1 includes a flange 3 connected to the grille body 1 and an upper connecting bracket 5 connected to the vehicle body, and the flange 3 and the upper connecting bracket 5 are fixedly connected by bolts 6; a circular hole 4 that can be adapted to the bolt 6 is opened on the flange 3, and a through hole corresponding to the circular hole 4 is provided on the upper connecting bracket 5.

[0038] The central fixing structure 2-2 is provided with at least two horizontal sections. The central fixing structure 2-2 includes a clip plate 8 connected to the grille body 1 and a central connecting bracket 10 connected to the vehicle body. The clip plate 8 is embedded in the central connecting bracket 10. The central connecting bracket 10 has a Z-shaped notch 11 at one end facing away from the vehicle body, corresponding to the clip plate 8. Upon impact, the clip plate 8 can retract into the Z-shaped notch 11 to avoid collapse.

[0039] The end of the Z-shaped notch 11 facing away from the vehicle body is connected to an upwardly inclined guide arc 12. This guide arc 12 forms a mating guide for the angle plate 8. The angle plate 8 is provided with a reinforcing rib assembly 9, comprising an upper reinforcing rib 9-1 and a lower reinforcing rib 9-2. The upper reinforcing rib 9-1 is located on the top surface of the angle plate 8, while the lower reinforcing rib 9-2 is located on the bottom surface of the angle plate 8. In the initial state, the distance H1 between the free end of the angle plate 8 and the inner end of the Z-shaped notch 11, closest to the vehicle body, is from the end of the lower reinforcing rib 9-2 facing away from the grille body 1 and the corresponding portion of the central connecting bracket 10. H1 is 3 mm. When the grille body 1 is impacted, the angle plate 8 cooperates with the central fixing structure 2-2 to provide a 3 mm collapse space for the grille body 1.

[0040] The lower fixing structure 2-3 is provided with at least two horizontal sections. The lower fixing structure 2-3 includes a clipping plate 14 connected to the grille body 1 and a lower connecting bracket 18 connected to the vehicle body. The clipping plate 14 is embedded in the lower connecting bracket 18. The lower connecting bracket 18 includes a tongue-pressing structure 19 and a lower bracket profile 21, which are opposed to each other. The tongue-pressing structure 19 and the lower bracket profile 21 are connected to the vehicle body at the same end. The tongue-pressing structure 19 is generally wavy in shape. The top surface of the clipping plate 14 is provided with a groove-shaped notch 15 that engages with the trough of the tongue-pressing structure 19. The wavy tongue-pressing structure 19 can cooperate with the groove-shaped notch 15 on the clipping plate 14 to form a limit between the two components. When the grille body 1 is impacted, the groove-shaped notch 15 overcomes resistance and extends toward the vehicle body. The end of the trough section 19-1 facing away from the vehicle body is connected to an upwardly inclined guide arc 20. The second guide arc 20 is used to guide the clamping plate 14 to enter between the tongue pressing structure 19 and the lower bracket profile 21;

[0041] The top surface of the clamping plate 14 is provided with a clamping reinforcement rib 16. There are two clamping reinforcement ribs 16, and the spacing between the two clamping reinforcement ribs 16 is equal to the width of the tongue-pressing structure 19. The two clamping reinforcement ribs 16 not only enhance the structural strength of the clamping plate 14, but also cooperate with the tongue-pressing structure 19 to prevent the tongue-pressing structure 19 and the clamping plate 14 from lateral displacement and loss of mutual support.

[0042] A guide rib 17 is provided between the two clamping reinforcement ribs 16, the top surface of the guide rib 17 being inclined upwards toward the side of the grille body 1. The guide rib 17 can form a guide fit with the second guide arc 20 and can also improve the structural strength of the clamping plate 14.

[0043] The tongue-pressing structure 19 includes a first trough section 19-1, a first crest section, a second trough section 19-2, a second crest section, a third trough section 19-3, and a third crest section, extending toward the vehicle body. The distances between the first crest section, the second crest section, and the third crest section and the lower bracket profile 21 are H2, H3, and H4, respectively, with the lengths of H2, H3, and H4 decreasing in sequence. The gradual decrease in the lengths of H2, H3, and H4 helps to reduce the resistance that the clip plate 14 must overcome when moving toward the vehicle.

[0044] The clamping plate 14 can move toward the vehicle body by more than 3 mm after an impact. This allows the grille body 1 to rotate toward the vehicle body with the upper fixing structure 2-1 serving as a fixed fulcrum, thereby providing a safety protection mechanism for collapse. This helps reduce both damage and the severity of damage to the grille body 1. This mounting structure also facilitates mounting the grille body 1 on the vehicle body.

[0045] The grille buffer structure described in the present invention adopts a fixed method through the upper fixed structure to form better support, and the middle fixed structure and the lower fixed structure are both embedded structures, which can achieve good collapse performance, help reduce the damage value, and further help improve the installation convenience when testing the grille body.

[0046] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grille buffer structure, comprising a grille body (1), wherein the grille body (1) is detachably mounted on a vehicle body via a connecting bracket (2), and is characterized in that: The connecting bracket (2) comprises an upper fixing structure (2-1), a middle fixing structure (2-2) and a lower fixing structure (2-3) arranged in sequence from top to bottom; the upper fixing structure (2-1) is provided with at least two in the horizontal direction; the upper fixing structure (2-1) comprises a flange (3) connected to the grille body (1) and an upper connecting bracket (5) connected to the vehicle body, the flange (3) and the upper connecting bracket (5) being fixedly connected by bolts (6); the middle fixing structure (2-2) is provided with at least two in the horizontal direction; the middle fixing structure (2-2) comprises a clamping angle plate (8) connected to the grille body (1) and a middle connecting bracket (10) connected to the vehicle body, the clamping angle plate (8) being embedded in the middle connecting bracket (10); the lower fixing structure (2-3) is provided with at least two in the horizontal direction; the lower fixing structure (2-3) comprises a clamping angle plate (8) connected to the grille body (1) and a middle connecting bracket (10) connected to the vehicle body The clamping plate (14) on the grid body (1) and the lower connecting bracket (18) connected to the vehicle body, the clamping plate (14) is embedded in the lower connecting bracket (18); the lower connecting bracket (18) includes a tongue pressing structure (19) and a lower bracket profile (21) opposite to each other, the tongue pressing structure (19) and the lower bracket profile (21) are connected to the vehicle body at the same end, and the tongue pressing structure (19) is wavy as a whole; the clamping plate (14) is embedded in the lower connecting bracket (18); the lower connecting bracket (18) includes a tongue pressing structure (19) and a lower bracket profile (21) opposite to each other at the same end, and the tongue pressing structure (19) is wavy as a whole; 4) is provided with a groove-shaped notch (15) for engaging the trough of the tongue-pressing structure (19); the tongue-pressing structure (19) comprises a trough section (19-1), a crest section, a trough section (19-2), a crest section (2), a trough section (19-3) and a crest section (3) extending toward one side of the vehicle body, wherein the distances between the crest section (19-1), the crest section (2) and the crest section (3) and the lower bracket profile (21) are H2, H3 and H4, respectively, and the lengths of H2, H3 and H4 are shortened in sequence.

2. The grid buffer structure according to claim 1, characterized in that: An end of the trough section (19-1) facing away from the vehicle body is connected to an upwardly inclined guide arc 2 (20).

3. A grid buffer structure according to claim 1 or 2, characterized in that: The top surface of the clamping plate (14) is provided with a clamping reinforcement rib (16), and two clamping reinforcement ribs (16) are provided, and the spacing between the two clamping reinforcement ribs (16) is equal to the width of the tongue pressing structure (19).

4. The grid buffer structure according to claim 3, characterized in that: A guide rib (17) is further provided between the two clamping reinforcement ribs (16), and the top surface of the guide rib (17) faces one side of the grille body (1) and is inclined upward.

5. A grid buffer structure according to claim 1 or 2, characterized in that: The end of the middle connecting bracket (10) facing away from the vehicle body is provided with a Z-shaped notch (11) corresponding to the angle plate (8).

6. The grid buffer structure according to claim 5, characterized in that: An end of the Z-shaped notch (11) facing away from the vehicle body is connected to an upwardly inclined guide arc (12).

7. The grid buffer structure according to claim 5, characterized in that: The corner plate (8) is provided with a reinforcing rib assembly (9), the reinforcing rib assembly (9) comprising an upper reinforcing rib (9-1) and a lower reinforcing rib (9-2), the upper reinforcing rib (9-1) being arranged on the top surface of the corner plate (8), and the lower reinforcing rib (9-2) being arranged on the bottom surface of the corner plate (8); in an initial state, a distance H1 is provided between the free end of the corner plate (8) and the inner end of the Z-shaped notch (11) close to the vehicle body, and a distance H1 is provided between the end of the lower reinforcing rib (9-2) facing away from the grille body (1) and the corresponding middle connecting bracket (10), and H1 is 3 mm.

8. A grid buffer structure according to claim 1 or 2, characterized in that: The flange (3) is provided with a circular hole (4) adapted to fit the bolt (6), and the upper connecting bracket (5) is provided with a through hole corresponding to the circular hole (4).

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