Bumper assembly

Abstract

The present invention relates to a bumper assembly, including a support member, a bumper anti-collision beam bracket and a bumper skin, wherein the support member is mounted and fixed on the bumper anti-collision beam bracket, and the bumper skin is mounted and fixed on the support member, and the support member is composed of a main structure and a rib structure located at the front end of the main structure, wherein the main structure is a honeycomb main structure, and the rib structure is an X-shaped energy-absorbing rib structure. The bumper assembly according to the present invention supports the bumper skin through the honeycomb main structure, and absorbs energy through the X-shaped energy-absorbing rib structure, while maintaining light weight and good visual effects; utilizing the polygonal structural stability of the honeycomb main structure of the support member, the stress conduction energy can be effectively dispersed, so that the parts are not easily deformed and have a buffering effect on the impact; utilizing the X-shaped energy-absorbing rib structure of the support member can meet the collision requirements at different angles, which not only protects pedestrians, but also effectively supports the bumper to prevent the skin from sinking.

Description

Technical Field

[0001] The present invention relates to a vehicle, and more particularly to a bumper assembly. Background Art

[0002] As the most common means of transportation, cars have become more and more popular in daily life. With the rapid development of science and technology, consumers' requirements for the appearance and safety performance of cars are gradually increasing. The impact of car bumpers on the appearance of cars is crucial. Therefore, in order to meet consumers' growing demand for appearance, car developers have made a big fuss about bumpers and are committed to developing new products with novel appearance and integrated multi-functions. At the same time, the weight of the bumper has also increased significantly. Therefore, how to make plastic bumpers meet the functions while maintaining lightweight and good visual effects is an urgent problem to be solved. Summary of the invention

[0003] In order to solve the problem that the bumper assembly in the prior art cannot achieve both light weight and good appearance, the present invention provides a bumper assembly.

[0004] The bumper assembly according to the present invention comprises a support member, a bumper anti-collision beam bracket and a bumper skin, wherein the support member is mounted and fixed on the bumper anti-collision beam bracket, and the bumper skin is mounted and fixed on the support member, wherein the support member is composed of a main structure and a rib structure located at the front end of the main structure, the main structure is a honeycomb main structure, and the rib structure is an X-shaped energy absorbing rib structure.

[0005] Preferably, the main structure is a hexagonal honeycomb structure.

[0006] Preferably, the wall thickness of the hexagonal honeycomb structure is between 1.5 mm and 3 mm, and the side length of the hexagonal honeycomb structure is between 10 mm and 20 mm.

[0007] Preferably, the cross-sectional width of the main structure in the vehicle body direction is between 40 mm and 80 mm.

[0008] Preferably, the rib structure is an X-shaped energy absorbing rib structure formed by cross-compounding two S-shaped ribs in different directions.

[0009] Preferably, the rib structure includes a first rib structure and a second rib structure, and the angle between the line connecting the two end points of the S-shaped rib and the vertical collision surface is called the rib angle, and the rib angle of the first rib structure is different from the rib angle of the second rib structure.

[0010] Preferably, the wall thickness of the S-shaped ribs is between 1.5 mm and 2.5 mm, and the spacing between adjacent S-shaped ribs is between 20 mm and 30 mm.

[0011] Preferably, the longitudinal depth from the root to the end of the S-shaped rib is between 45-70 mm.

[0012] Preferably, the support member is connected to the bumper anti-collision beam bracket by fasteners and / or snaps.

[0013] Preferably, the support member is connected to the bumper skin via fasteners and / or snaps.

[0014] The bumper assembly according to the present invention supports the bumper skin through a honeycomb main structure and absorbs energy through an X-shaped energy-absorbing rib structure, while maintaining lightweight and good visual effects. The bumper assembly according to the present invention utilizes the polygonal structural stability of the honeycomb main structure of the support member, and can effectively disperse stress and conduct energy under the same stress conditions, so that the parts are not easily deformed and have a buffering effect on the impact; the X-shaped energy-absorbing rib structure of the support member can meet the collision requirements at different angles, which not only protects pedestrians, but also effectively supports the bumper to prevent the skin from sinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an exploded view of a bumper assembly according to a preferred embodiment of the present invention;

[0016] Figure 2 Shows Figure 1 Supporting parts;

[0017] Figure 3 Shows Figure 2 The main structure of

[0018] Figure 4 Shows Figure 2 The first rib structure;

[0019] Figure 5 Shows Figure 2 The second rib structure;

[0020] Figure 6 It is along Figure 1 A cross-sectional view of line AA;

[0021] Figure 7 It is along Figure 1 A cross-sectional view along line BB. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.

[0023] like Figure 1As shown, a bumper assembly according to a preferred embodiment of the present invention includes a support member 1, a bumper anti-collision beam bracket 2 and a bumper skin 3, wherein the support member 1 is mounted and fixed on the bumper anti-collision beam bracket 2, and the bumper skin 3 is mounted and fixed on the support member 1. Therefore, the support member 1 for supporting the bumper skin 3 can prevent the bumper skin 3 from sinking.

[0024] like Figure 2 As shown, the support member 1 is composed of a main structure 11 and a rib structure 12, wherein the rib structure 12 is located at the front end of the main structure 11. Specifically, the main structure 11 is a honeycomb main structure, and the rib structure 12 is an X-shaped energy absorbing rib structure. Therefore, the support member 1 absorbs energy through the honeycomb structure and the X-shaped energy absorbing ribs.

[0025] In this embodiment, the main structure 11 is a hexagonal honeycomb structure. Figure 3 As shown, the stress dispersion is not easy to deform, not easy to fatigue and fracture, and has a strong buffering capacity, so that energy can be better transmitted and dispersed. Specifically, the hexagonal honeycomb structure includes a number of nodes, and the effective coverage area of ​​each node is a regular hexagon of equal size. In particular, since the perimeter of the hexagon is shorter than the perimeter of the quadrilateral when the area of ​​the bracket body shell is the same, the material required to form the hexagonal connecting ribs is relatively less than the material required to form the quadrilateral connecting ribs, so that the injection molded product can achieve the purpose of reducing material costs, reducing deformation, and increasing buffering capacity. In the honeycomb structure, the derivative line of each node has 3 neighbors, and the circumference of its sensing area is just completely covered by these 3 neighbors, and the angle covered by each neighbor is 120 degrees. In a preferred embodiment, the wall thickness of the honeycomb structure is between 1.5mm-3mm, and the side length of the hexagon is between 10mm-20mm. In addition, in a preferred embodiment, the cross-sectional width L1 of the main structure 11 in the direction of the vehicle body (see Figure 2 ) is between 40mm and 80mm. It should be understood that the main structure 11 can also be a derivative structure of a polygon such as a quadrilateral or a pentagon.

[0026] In this embodiment, the rib structure 12 is an X-shaped energy absorbing rib structure. Figure 4 and Figure 5As shown, it is formed by the cross-compounding of two S-shaped ribs (i.e., the first rib 12a, 12a' and the second rib 12b, 12b') in two different directions. Specifically, since the bumper skin 3 has a certain arc shape, the energy-absorbing ribs are also designed to have a curved surface state with a certain curvature, so that when a collision occurs, the energy-absorbing ribs are perpendicular to the tangent direction of the collided curved surface to produce the best energy absorption effect. In the process of collision, since the impact force brought by the curved surface is not fixed, but in the process of collision, it is hoped that the bracket (i.e., the support member 1 and the bumper anti-collision beam bracket 2 assembly) can have a certain elastic elasticity to absorb the energy generated by the collision, the energy-absorbing ribs are designed to be S-shaped. Due to the unique curvature of the shape of the bumper skin 3, the direction of the force generated by the collision at different positions is different. In order to better absorb energy, the shape of the S-shaped ribs is not fixed, and the parameter settings of different S-shaped ribs can meet different collision requirements. Specifically, since the directions of the impact forces generated during a collision are different, two S-shaped ribs in different directions are cross-compounded at the same point. This ensures that the S-shaped ribs can absorb and alleviate the impact force to the greatest extent possible, regardless of the direction of the collision. This allows for better energy absorption, meeting the requirements of low-speed collisions, and also meeting the requirements of pedestrian protection. In this way, the X-shaped energy-absorbing rib structure formed by the cross-compounding of two S-shaped ribs in different directions enables the rib structure 12 to withstand impacts of greater forces and meet collision requirements at different angles. In addition, in order to better meet the requirements of head-on collisions, corner collisions, and pedestrian protection, the rib structure 12 adopts a segmented design according to the different directions of the forces borne by the S-shaped ribs in different areas. It includes a first rib structure 121 and a second rib structure 122, such as Figure 2 Specifically, the angle between the line connecting the two points of the S-shaped rib and the vertical collision surface is called the rib angle G, as shown in Figure 4 and Figure 5 As shown, the rib angle G1 of the first rib structure 121 is different from the rib angle G2 of the second rib structure 122. Further, the rib structure 12 designed in this way has a certain elasticity after the collision and can rebound to the initial state. In a preferred embodiment, the wall thickness of the S-shaped rib is between 1.5mm and 2.5mm, and the spacing L2 between adjacent S-shaped ribs (see Figure 4 ) is between 20-30mm, the longitudinal depth L3 from the root to the end of the S-shaped rib in the X-direction section (see Figure 5 ) is between 45-70mm.

[0027] In this embodiment, the support member 1 is connected to the bumper anti-collision beam bracket 2 by fasteners. Figure 6As shown, the support member 1 is fixed to the bumper anti-collision beam bracket 2 by bolts 4, and then the bumper anti-collision beam bracket 2 provides effective support to the support member 1 in the Z direction, thereby preventing the support member 1 from sinking and turning over, and reducing the risk of the entire bumper assembly sinking. It should be understood that the support member 1 can also be installed on the bumper anti-collision beam bracket 2 by a structure such as a buckle.

[0028] In this embodiment, the support member 1 is connected to the bumper skin 3 by fasteners. Figure 7 As shown, the support member 1 has a tube column (i.e., a tubular structure BOSS column) 13, and the bumper skin 3 has a hole 31. The bolt 5 passes through the hole 31 and is inserted into the tube column 13 to fix the bumper skin 3 on the support member 1. Preferably, the hole 31 is a flanged hole to achieve a positioning and fastening effect. It should be understood that the bumper skin 3 can also be installed on the support member 1 by a structure such as a buckle.

[0029] In summary, the bumper assembly according to the present invention utilizes the polygonal structural stability of the main structure 11 of the support member 1, and can effectively disperse stress and conduct energy under the same stress conditions, so that the parts are not easily deformed and have a buffering effect on the impact. Specifically, the honeycomb main structure 11 of the support member 1 has higher strength and rigidity than other forms of sandwich structures. The overall part structure combined with mechanical experiments proves that the polygonal honeycomb structure is easier to disperse stress than the traditional box-shaped structure. Under the impact of external forces, energy can be conducted everywhere through the connected ribs to effectively absorb energy. In addition, the bumper assembly of the present invention utilizes the segmented X-rib structure of the rib structure 12 of the support member 1 to meet the collision requirements of different angles, which not only protects pedestrians, but also effectively supports the bumper to prevent the skin from sinking. In particular, the wall thickness of the support member 1 of the bumper assembly according to the present invention is relatively thin, generally only between 2.0-2.5mm, which is smaller than the common 2.5-3.0mm in the prior art. In addition, the support member 1 of the bumper assembly according to the present invention is extremely easy to install and remove on the bumper anti-collision beam bracket 2, and can provide effective support for the bumper assembly and reduce the risk of bumper sinking.

[0030] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The above embodiment of the present invention can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the description of the present invention fall within the scope of protection of the claims of the present invention. The contents not described in detail in the present invention are all conventional technical contents.

Claims

1. A bumper assembly, It is characterized in that It includes a support member, a bumper anti-collision beam bracket and a bumper skin, wherein the support member is installed and fixed on the bumper anti-collision beam bracket, and the bumper skin is installed and fixed on the support member, wherein the support member is composed of a main structure and a rib structure located at the front end of the main structure, the main structure is a honeycomb main structure, the rib structure is an X-shaped energy-absorbing rib structure, and the rib structure is an X-shaped energy-absorbing rib structure formed by crossing and compounding two S-shaped ribs in different directions, the rib structure includes a first rib structure and a second rib structure, and the angle between the line connecting the two end points of the S-shaped rib and the vertical collision surface is called the rib angle, and the rib angle of the first rib structure is different from the rib angle of the second rib structure.

2. The bumper assembly according to claim 1, It is characterized in that The main structure is a hexagonal honeycomb structure.

3. The bumper assembly according to claim 2, It is characterized in that The wall thickness of the hexagonal honeycomb structure is between 1.5 mm and 3 mm, and the side length of the hexagonal honeycomb structure is between 10 mm and 20 mm.

4. The bumper assembly according to claim 2, It is characterized in that The cross-sectional width of the main structure in the direction of the vehicle body is between 40mm and 80mm.

5. The bumper assembly according to claim 1, It is characterized in that The wall thickness of the S-shaped ribs is between 1.5 mm and 2.5 mm, and the spacing between adjacent S-shaped ribs is between 20 mm and 30 mm.

6. The bumper assembly according to claim 1, It is characterized in that The longitudinal depth from the root to the end of the S-shaped rib is between 45-70mm.

7. The bumper assembly according to claim 1, It is characterized in that The support member is connected to the bumper anti-collision beam bracket through fasteners and / or buckles.

8. The bumper assembly according to claim 1, It is characterized in that The support member is connected to the bumper skin via fasteners and / or snaps.

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