Energy-absorbing foam, bumper assembly and vehicle

Abstract

The utility model provides energy-absorbing foam, a bumper assembly and a vehicle. One of the two ends of the energy-absorbing foam is an abutting end matched with the anti-collision beam, and a first energy-absorbing space and a second energy-absorbing space are formed in the two ends of the energy-absorbing foam respectively; a cracking groove is formed in the area, located between the first energy absorption space and the second energy absorption space, of the energy absorption foam, so that a first stress concentration area is formed in the part between the cracking groove and the first energy absorption space, and / or a second stress concentration area is formed in the part between the cracking groove and the second energy absorption space. When impact force from the bumper skin to the anti-collision beam is borne, the energy-absorbing foam is compressed, when the abutting end is pressed to a certain degree, the energy-absorbing foam can crack from the stress concentration area till the energy-absorbing space collapses, and then the energy-absorbing foam loses resilience force. The energy-absorbing foam can be crushed when being subjected to impact force, and does not generate resilience force in the later stage while absorbing energy in the early stage, so that secondary injury to legs of pedestrians is avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to an energy-absorbing foam, a bumper assembly including the energy-absorbing foam, and a vehicle including the bumper assembly. Background Art

[0002] The front bumper energy-absorbing component can play a protective role in the event of a vehicle collision. The bumper's own material and the energy-absorbing foam between the bumper and the anti-collision beam make the vehicle have a collision-proof and buffering effect on pedestrians in the event of a collision. When a pedestrian's legs are impacted, traditional energy-absorbing foam can usually only be compressed and deformed. After the energy-absorbing foam is deformed, it will rebound the previously absorbed energy to the legs, causing secondary damage to the legs. Utility Model Content

[0003] In view of this, the present application provides an energy-absorbing foam, which can avoid the problem of secondary injury to the legs. The present application also provides a bumper assembly including the energy-absorbing foam. The present application also provides a vehicle including the bumper assembly.

[0004] An energy absorbing foam is used to be arranged between a bumper skin and an anti-collision beam, one of the two ends of the energy absorbing foam is an abutment end matched with the anti-collision beam, and the two ends respectively form a first energy absorbing space and a second energy absorbing space;

[0005] A fracture groove is formed in the region of the energy absorbing foam between the first energy absorbing space and the second energy absorbing space, so that a first stress concentration zone is formed in the portion between the fracture groove and the first energy absorbing space, and / or a second stress concentration zone is formed in the portion between the fracture groove and the second energy absorbing space.

[0006] Optionally, in the above energy-absorbing foam, the first energy-absorbing space and the second energy-absorbing space are symmetrical structures.

[0007] Optionally, in the above energy absorbing foam, the first energy absorbing space has a first opening, and the second energy absorbing space has a second opening away from the first opening;

[0008] The abutment end includes an abutment surface that cooperates with the anti-collision beam;

[0009] The portion of the energy absorbing foam surrounding the first opening is the abutting surface.

[0010] Optionally, in the above energy absorbing foam, the energy absorbing foam comprises a first C-shaped portion, a second C-shaped portion, and a middle portion connecting the first C-shaped portion and the second C-shaped portion; the first C-shaped portion encloses the first energy absorbing space, and the second C-shaped portion encloses the second energy absorbing space;

[0011] The collapse groove is formed by a region where the first C-shaped portion is not connected to the middle portion, the middle portion, and a region where the second C-shaped portion is not connected to the middle portion.

[0012] Optionally, in the above energy-absorbing foam, the fracture groove includes a first connection area where the first C-shaped portion connects with the middle portion, and a second connection area where the second C-shaped portion connects with the middle portion;

[0013] The portion between the first connecting area and the first energy absorbing space forms the first stress concentration area, and / or the portion between the second connecting area and the second energy absorbing space forms the second stress concentration area.

[0014] Optionally, in the above energy-absorbing foam, the first connecting area forms a sharp angle, and / or the second connecting area forms a sharp angle.

[0015] A bumper assembly comprises a bumper skin, an anti-collision beam, and an energy-absorbing foam arranged between the bumper skin and the anti-collision beam, wherein the energy-absorbing foam is the energy-absorbing foam described above.

[0016] Optionally, in the above-mentioned bumper assembly, the abutting end of the energy-absorbing foam is in contact with the anti-collision beam; and an end of the energy-absorbing foam away from the abutting end can be in contact with the bumper skin.

[0017] Optionally, in the above-mentioned bumper assembly, the abutting end is adhesively fixed to the anti-collision beam.

[0018] A vehicle comprises the bumper assembly described above.

[0019] In the energy-absorbing foam, bumper assembly and vehicle provided by the present application, the two ends of the energy-absorbing foam respectively form a first energy-absorbing space and a second energy-absorbing space, and one end of the energy-absorbing foam is an abutting end abutting against the anti-collision beam, and at the same time, a fracture groove is formed between the two energy-absorbing spaces of the energy-absorbing foam, and the portion between the fracture groove and the first energy-absorbing space forms a first stress concentration area, and / or the portion between the fracture groove and the second energy-absorbing space forms a second stress concentration area; when subjected to the impact force from the bumper skin to the anti-collision beam, the energy-absorbing foam is compressed, and when the abutting end is pressed to a certain extent, the energy-absorbing foam can crack from the first stress concentration area to cause the first energy-absorbing space to collapse, and / or can crack from the second stress concentration area to cause the second energy-absorbing space to collapse, thereby causing the energy-absorbing foam to lose its resilience; the energy-absorbing foam can be crushed when subjected to the impact force, and while absorbing energy in the early stage, no resilience will be generated in the later stage, thereby avoiding secondary damage to the legs of pedestrians. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the energy-absorbing foam and the anti-collision beam;

[0022] Figure 2 It is a cross-sectional view of the cooperation between the energy-absorbing foam and the anti-collision beam.

[0023] exist Figure 1-Figure 2 middle:

[0024] 1-Energy absorbing foam, 2-Anti-collision beam;

[0025] 101-first energy absorption space, 102-second energy absorption space, 103-fracture groove, 104-abutment surface, 105-first connection area, 106-second connection area;

[0026] 1011-first opening;

[0027] 1021-Second opening. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] like Figure 1-2 As shown, an embodiment of the present application provides an energy absorbing foam 1, which is used to be arranged between a bumper skin and an anti-collision beam 2. One of the two ends of the energy absorbing foam 1 is an abutting end that cooperates with the anti-collision beam 2, and the two ends of the energy absorbing foam 1 respectively form a first energy absorbing space 101 and a second energy absorbing space 102. A fracture groove 103 is formed in the region of the energy absorbing foam 1 between the first energy absorbing space 101 and the second energy absorbing space 102, so that a first stress concentration area is formed in the portion between the fracture groove 103 and the first energy absorbing space 101, and / or a second stress concentration area is formed in the portion between the fracture groove 103 and the second energy absorbing space 102.

[0030] It should be noted that the cooperation between the abutting end of the energy absorbing foam 1 and the anti-collision beam 2 means that when subjected to an impact force in the direction from the bumper skin to the anti-collision beam 2 , the abutting end of the energy absorbing foam 1 is pressed against the anti-collision beam 2 .

[0031] The energy absorbing foam 1 has a wall surrounding a first energy absorbing space 101, and the first stress concentration area is a part of the wall and is the part with the weakest structural strength in the wall. The energy absorbing foam 1 has a wall surrounding a second energy absorbing space 102, and the second stress concentration area is a part of the wall and is the part with the weakest structural strength in the wall.

[0032] A material-missing fracture groove 103 is formed in the region between the first energy-absorbing space 101 and the second energy-absorbing space 102 of the energy-absorbing foam 1; by controlling the material-missing region of the fracture groove 103, a first stress concentration region that can be cracked to collapse the first energy-absorbing space 101 (the collapse of the first energy-absorbing space 101 means the collapse of the surrounding wall of the first energy-absorbing space 101) and a second stress concentration region that can be cracked to collapse the second energy-absorbing space 102 (the collapse of the second energy-absorbing space 102 means the collapse of the surrounding wall of the second energy-absorbing space 102) can be obtained. When subjected to impact force and the abutting end of the energy-absorbing foam 1 is subjected to a certain degree of pressure, the stress concentration region cracks.

[0033] Furthermore, the energy-absorbing foam 1 only forms a first stress concentration zone in the portion between the rupture groove 103 and the first energy-absorbing space 101; when subjected to impact force, the first stress concentration zone cracks to cause the first energy-absorbing space 101 to collapse, thereby causing the energy-absorbing foam 1 to lose the rebound force generated by the existence of the first energy-absorbing space 101, thereby reducing the secondary damage to the pedestrian's legs caused by the rebound of the energy-absorbing foam 1 to a certain extent.

[0034] Alternatively, the energy-absorbing foam 1 only forms a second stress concentration zone in the portion between the rupture groove 103 and the second energy-absorbing space 102; when subjected to impact force, the second stress concentration zone cracks to cause the second energy-absorbing space 102 to collapse, thereby causing the energy-absorbing foam 1 to lose the rebound force generated by the existence of the second energy-absorbing space 102, thereby reducing the secondary damage to the pedestrian's legs caused by the rebound of the energy-absorbing foam 1 to a certain extent.

[0035] Alternatively, the energy-absorbing foam 1 forms a first stress concentration zone between the rupture groove 103 and the first energy-absorbing space 101, and a second stress concentration zone between the rupture groove 103 and the second energy-absorbing space 102; when subjected to impact force, the first stress concentration zone cracks to cause the first energy-absorbing space 101 to collapse, and at the same time, the second stress concentration zone cracks to cause the second energy-absorbing space 102 to collapse, thereby causing the energy-absorbing foam 1 to lose the rebound force generated by the existence of the first energy-absorbing space 101 and the second energy-absorbing space 102, thereby minimizing the secondary damage to the pedestrian's legs caused by the rebound of the energy-absorbing foam 1.

[0036] The energy-absorbing foam 1 can be crushed when subjected to impact force. While absorbing energy in the early stage, it will not generate rebound force in the later stage, thus avoiding secondary damage to the legs.

[0037] It should be further explained that the energy absorbing foam 1 has an extension length, and the extension length of the energy absorbing foam 1 is parallel to the extension length of the anti-collision beam 2. Along the extension length direction of the energy absorbing foam 1, the energy absorbing foam 1 has two opposite end faces. The stress concentration area has an extension length that runs through the above two end faces. As above, the energy absorbing foam 1 can be cracked from the stress concentration area to completely collapse the energy absorbing space, and along the extension length direction of the energy absorbing foam 1, the energy absorbing foam 1 no longer has any local area that can rebound.

[0038] Preferably, the extension length of the first stress concentration zone and the extension length of the second stress concentration zone are both parallel to the extension length of the energy absorbing foam 1 .

[0039] In certain embodiments of the present application, the first energy absorption space 101 and the second energy absorption space 102 are symmetrical structures.

[0040] It should be noted that the energy absorbing foam 1 is a symmetrical structure. When the energy absorbing foam 1 is arranged between the bumper skin and the anti-collision beam 2, the symmetry axis of the energy absorbing foam 1 is perpendicular to the direction from the bumper skin to the anti-collision beam 2; the first energy absorbing space 101 and the second energy absorbing space 102 are symmetrical about the above-mentioned symmetry axis.

[0041] As mentioned above, the energy-absorbing foam 1 has a regular shape, and the forces on both ends of the energy-absorbing foam 1 are relatively balanced, which facilitates the simultaneous cracking of the two stress concentration areas corresponding to the two energy-absorbing spaces in the crack groove 103; at the same time, its structure is relatively simple, which is convenient for production and processing, and convenient for assembly between the bumper skin and the anti-collision beam 2.

[0042] In some embodiments of the present application, the first energy absorbing space 101 has a first opening 1011, and the second energy absorbing space 102 has a second opening 1021 away from the first opening 1011. The abutting end includes an abutting surface 104 that cooperates with the anti-collision beam 2. The portion of the energy absorbing foam 1 surrounding the first opening 1011 forms the abutting surface 104.

[0043] Please see attached Figure 2 , attached Figure 2 The dotted lines in the figure are not the structural lines that constitute the energy-absorbing foam 1 , and the positions indicated by the dotted lines are the positions of the first opening 1011 and the second opening 1021 .

[0044] The first energy-absorbing space 101 with the first opening 1011 can just form a circumferentially closed area with the anti-collision beam 2, and no additional material is required at the first opening 1011. While ensuring that the energy-absorbing foam 1 can collapse due to the existence of the first energy-absorbing space 101, the material usage of the energy-absorbing foam 1 is greatly saved. Similarly, the second energy-absorbing space 102 with the second opening 1021 can just form a circumferentially closed area with the bumper skin, and no additional material is required at the second opening 1021. While ensuring that the energy-absorbing foam 1 can collapse due to the existence of the second energy-absorbing space 102, the material usage of the energy-absorbing foam 1 is greatly saved.

[0045] Of course, the first energy absorbing space 101 can also be set to be closed along its circumference; in this case, the surrounding wall of the energy absorbing foam 1 surrounding the first energy absorbing space 101 close to the anti-collision beam 2 forms an abutment surface 104. Of course, the second energy absorbing space 102 can also be set to be closed along its circumference.

[0046] In certain embodiments of the present application, the energy absorbing foam 1 includes a first C-shaped portion, a second C-shaped portion, and a middle portion connecting the first C-shaped portion and the second C-shaped portion. The first C-shaped portion encloses a first energy absorbing space 101, and the second C-shaped portion encloses a second energy absorbing space 102. A collapse groove 103 is formed in the area where the first C-shaped portion is not connected to the middle portion, the middle portion, and the area where the second C-shaped portion is not connected to the middle portion.

[0047] It should be noted that the bottom of the fracture groove 103 is the end face of the middle part located between the first C-shaped part and the second C-shaped part; the two groove walls of the fracture groove 103 are respectively the area where the first C-shaped part is not connected to the middle part, and the area where the second C-shaped part is not connected to the middle part.

[0048] Preferably, the first C-shaped portion, the second C-shaped portion and the middle portion form an H-shaped energy absorbing foam 1, which has two upper and lower fracture grooves 103. As described above, the first energy absorbing space 101 can correspond to two first stress concentration areas, so that the number of fracture positions where the first energy absorbing space 101 collapses increases; the second energy absorbing space 102 can correspond to two second stress concentration areas, so that the number of fracture positions where the second energy absorbing space 102 collapses increases.

[0049] It should be noted that a whole piece of regular foam raw material can be taken, the foam raw material has an extended length, and the foam raw material has four end faces parallel to its extended length direction, and the above four end faces are processed separately, wherein: a group of two opposite end faces are respectively opened with C-shaped grooves, thereby obtaining a first energy absorption space 101 and a second energy absorption space 102; another group of two opposite end faces are respectively opened with fracture grooves 103; as above, the energy absorption foam 1 with the first C-shaped portion, the second C-shaped portion, and the middle portion being integrally connected is finally obtained.

[0050] Furthermore, a fracture groove 103 is opened to form a first stress concentration zone corresponding to the first energy absorption space 101, and the wall thickness of the first stress concentration zone is the thinnest in the surrounding wall forming the first energy absorption space 101; at the same time, a second stress concentration zone is formed corresponding to the second energy absorption space 102, and the wall thickness of the second stress concentration zone is the thinnest in the surrounding wall forming the second energy absorption space 102.

[0051] As mentioned above, the energy-absorbing foam 1 has a simple structure and a regular shape, and is easy to produce and process.

[0052] In some embodiments of the present application, the fracture groove 103 includes a first connecting area 105 where the first C-shaped portion connects with the middle portion, and a second connecting area 106 where the second C-shaped portion connects with the middle portion. The portion between the first connecting area 105 and the first energy absorption space 101 forms a first stress concentration area.

[0053] Furthermore, the portion between the second connecting area 106 and the second energy absorbing space 102 forms a second stress concentration area.

[0054] The stress concentration area is formed in the above-mentioned connection area, that is, the stress concentration area is formed at the connection between the groove bottom and the groove wall of the fracture groove 103, which facilitates the integrated opening and molding setting of the fracture groove 103 and effectively improves the manufacturing efficiency of the energy-absorbing foam 1.

[0055] In some embodiments of the present application, the first connecting region 105 is formed with a sharp angle.

[0056] Furthermore, the second connecting area 106 forms a sharp angle.

[0057] The connecting area is configured to have a structure with a sharp angle, so that stress is concentrated in the stress concentration area and a stress peak is formed, so that the energy-absorbing foam 1 can quickly crack from the stress concentration area to cause it to collapse.

[0058] In summary, the present application also discloses a bumper assembly; the bumper assembly includes a bumper skin, an anti-collision beam 2, and an energy-absorbing foam 1 arranged between the bumper skin and the anti-collision beam 2, and the energy-absorbing foam 1 is the energy-absorbing foam described above.

[0059] Since the bumper assembly of the present application has the energy-absorbing foam 1 described above, the beneficial effects of the bumper assembly brought by the energy-absorbing foam 1 can be found above and will not be described in detail here.

[0060] In certain embodiments of the present application, the abutting end of the energy absorbing foam 1 is in contact with the anti-collision beam 2 ; and the end of the energy absorbing foam 1 away from the abutting end can be in contact with the bumper skin.

[0061] As described above, when subjected to impact force, the energy-absorbing foam 1 can be closely fitted to the anti-collision beam 2, and at the same time, the energy-absorbing foam 1 can be closely fitted to the bumper skin, thereby enabling the energy-absorbing foam 1 to exert the best anti-collision buffering effect.

[0062] In some embodiments, the abutting surface 104 of the abutting end is adhesively fixed to the anti-collision beam 2 .

[0063] The abutting surface 104 of the energy absorbing foam 1 is fitted to the side wall of the anti-collision beam 2, which can ensure the close fitting effect of the abutting surface 104 and the side wall of the anti-collision beam 2, thereby ensuring the firm fixing effect of the energy absorbing foam 1 on the anti-collision beam 2. Furthermore, the bonding and fixing method is simple, which can not only achieve the firm fixing of the energy absorbing foam 1 and the anti-collision beam 2, but also facilitate processing and assembly, saving time and labor.

[0064] In summary, the present application also discloses a vehicle; the vehicle includes the bumper assembly described above.

[0065] Since the vehicle of the present application has the bumper assembly described above, the beneficial effects of the bumper assembly on the vehicle can be found above and will not be described in detail here.

[0066] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0067] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0068] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0069] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0070] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0071] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. An energy-absorbing foam, characterized in that: Used to be arranged between the bumper skin and the anti-collision beam (2), one of the two ends of the energy-absorbing foam (1) is an abutment end matched with the anti-collision beam (2), and the two ends respectively form a first energy-absorbing space (101) and a second energy-absorbing space (102); A fracture groove (103) is formed in the region of the energy absorbing foam (1) between the first energy absorbing space (101) and the second energy absorbing space (102), so that a first stress concentration zone is formed in the portion between the fracture groove (103) and the first energy absorbing space (101), and / or a second stress concentration zone is formed in the portion between the fracture groove (103) and the second energy absorbing space (102).

2. The energy-absorbing foam according to claim 1, characterized in that The first energy absorbing space (101) and the second energy absorbing space (102) are symmetrical structures.

3. The energy-absorbing foam according to claim 1 or 2, characterized in that: The first energy absorbing space (101) has a first opening (1011), and the second energy absorbing space (102) has a second opening (1021) facing away from the first opening (1011); The abutment end comprises an abutment surface (104) that cooperates with the anti-collision beam (2); The portion of the energy absorbing foam (1) surrounding the first opening (1011) is the abutting surface (104).

4. The energy-absorbing foam according to claim 3, characterized in that The energy absorbing foam (1) comprises a first C-shaped portion, a second C-shaped portion, and a middle portion connecting the first C-shaped portion and the second C-shaped portion; the first C-shaped portion encloses the first energy absorbing space (101), and the second C-shaped portion encloses the second energy absorbing space (102); The fracture groove (103) is formed by the area where the first C-shaped portion is not connected to the middle portion, the middle portion, and the area where the second C-shaped portion is not connected to the middle portion.

5. The energy-absorbing foam according to claim 4, characterized in that The fracture groove (103) comprises a first connection area (105) where the first C-shaped portion is connected to the middle portion, and a second connection area (106) where the second C-shaped portion is connected to the middle portion; The portion between the first connecting area (105) and the first energy absorbing space forms the first stress concentration area, and / or the portion between the second connecting area (106) and the second energy absorbing space forms the second stress concentration area.

6. The energy absorbing foam according to claim 5, characterized in that The first connecting area (105) forms a sharp angle, and / or the second connecting area (106) forms a sharp angle.

7. A bumper assembly, characterized in that: The invention comprises a bumper skin, an anti-collision beam (2), and an energy-absorbing foam (1) arranged between the bumper skin and the anti-collision beam (2), wherein the energy-absorbing foam (1) is the energy-absorbing foam described in any one of claims 1 to 6.

8. The bumper assembly according to claim 7, characterized in that: The abutting end of the energy absorbing foam (1) is in contact with the anti-collision beam (2); and the end of the energy absorbing foam (1) away from the abutting end can be in contact with the bumper skin.

9. The bumper assembly according to claim 7, characterized in that: The abutting end is adhesively fixed to the anti-collision beam (2).

10. A vehicle, characterized in that: A bumper assembly comprising any one of claims 7-9.

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