Energy-absorbing foam, bumper assembly and vehicle
By setting up a rupture groove in the energy-absorbing foam to change the direction of impact, the problem of traditional energy-absorbing foam causing secondary damage to pedestrian legs when a vehicle crashes, and the effect of not rebounding during the energy-absorbing process is achieved. Improved security.
Patent Information
- Application Number
- CN202421148206.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional energy-absorbing foam causes secondary damage to pedestrian legs when a vehicle collides, because it rebounds after energy absorption.
Design an energy-absorbing foam, which is equipped with a rupture groove in the energy-absorbing space. The angle between the groove depth direction of the rupture groove and the direction where the energy-absorbing foam bears impact force is not right, causing the impact force to decompose the foam to collapse automatically Cracking and collapse to avoid rebound.
It effectively avoids secondary damage to the legs, ensures that there is no rebound force during the energy absorption process, and improves safety.
Smart Images
Figure CN222202471U_ABST
Abstract
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 assembly 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 enable the vehicle to play a collision-proof and buffering role for 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. The energy absorbing foam encloses an energy absorbing space and has an abutment portion for cooperating with the anti-collision beam. A fracture groove is opened on the energy absorbing foam, and the angle between the groove depth direction of the fracture groove and the direction in which the energy absorbing foam bears the impact force is non-right angle.
[0005] Optionally, in the above energy-absorbing foam, the energy-absorbing space has an opening, and the portion of the energy-absorbing foam surrounding the opening forms the abutting portion.
[0006] Optionally, in the above energy-absorbing foam, the cross-sectional shape of the energy-absorbing foam is C-shaped.
[0007] Optionally, in the above energy-absorbing foam, the depth direction of the fracture groove is the same as the opening direction of the energy-absorbing space.
[0008] Optionally, in the above energy absorbing foam, the collapse groove is formed on the outer wall of the energy absorbing foam.
[0009] Optionally, in the above energy-absorbing foam, the cross-sectional shape of the fracture groove is any one of an isosceles trapezoid, a C shape, a U shape, and a V shape.
[0010] Optionally, in the above energy absorbing foam, the fracture groove is parallel to the extension direction of the energy absorbing foam and penetrates the energy absorbing foam.
[0011] A bumper assembly comprises a bumper skin, an anti-collision beam, and energy-absorbing foam arranged between the bumper skin and the anti-collision beam; the energy-absorbing foam is the energy-absorbing foam described above.
[0012] Optionally, in the above-mentioned bumper assembly, the abutment portion of the energy-absorbing foam is adhesively fixed to the anti-collision beam.
[0013] A vehicle comprises the bumper assembly described above.
[0014] In the energy-absorbing foam, bumper assembly and vehicle provided by the present application, the energy-absorbing foam encloses an energy-absorbing space and has an abutment portion that cooperates with the anti-collision beam, and a fracture groove is opened on the energy-absorbing foam; when subjected to the impact force from the bumper skin to the anti-collision beam, the energy-absorbing foam is compressed and deformed, and when the energy-absorbing foam is compressed to a certain extent, since the angle between the groove depth direction of the fracture groove and the direction in which the energy-absorbing foam bears the impact force is not a right angle, the impact force has a decomposition force perpendicular to the groove wall of the fracture groove, and under the action of the decomposition force, the energy-absorbing foam can crack from the fracture groove to cause the energy-absorbing space to collapse (the collapse of the energy-absorbing space is also the collapse of the energy-absorbing foam), 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 injury to the legs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] 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.
[0016] Figure 1 It is a schematic diagram of the structure of the energy-absorbing foam and the anti-collision beam;
[0017] Figure 2 It is a cross-sectional view of the cooperation between the energy-absorbing foam and the anti-collision beam;
[0018] Figure 3 It is a cross-sectional view of the cooperation between the energy-absorbing foam and the anti-collision beam.
[0019] exist Figure 1-Figure 3 middle:
[0020] 1-Energy absorbing foam, 2-Anti-collision beam;
[0021] 101-energy absorbing space, 102-abutting portion, 103-fracture groove;
[0022] 1011-Opening. DETAILED DESCRIPTION
[0023] 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.
[0024] like Figure 1-3 As shown, an embodiment of the present application provides an energy-absorbing foam, and the energy-absorbing foam 1 is used to be arranged between the bumper skin and the anti-collision beam 2. The energy-absorbing foam 1 encloses an energy-absorbing space 101 and has an abutment portion 102 for cooperating with the anti-collision beam 2. A fracture groove 103 is provided on the energy-absorbing foam 1, and the angle between the groove depth direction of the fracture groove 103 and the direction in which the energy-absorbing foam 1 bears the impact force is non-right angle.
[0025] It should be noted that the impact force borne by the energy-absorbing foam 1 is the impact force borne in the direction from the bumper skin to the anti-collision beam 2. Figure 2 The depth direction of the fracture groove 103 is the direction from the groove opening to the groove bottom of the fracture groove 103. Figure 2 Direction indicated by the arrow.
[0026] The abutment portion 102 of the energy-absorbing foam 1 cooperates with the anti-collision beam 2, which means that when subjected to impact force, the abutment portion 102 presses against the anti-collision beam 2. The fracture groove 103 forms a stress concentration area in the energy-absorbing foam 1. When subjected to impact force, the stress concentration area will first break, thereby reliably ensuring the location where the energy-absorbing foam 1 (that is, the energy-absorbing space 101) collapses. Specifically:
[0027] When subjected to the impact force from the bumper skin to the anti-collision beam 2, the energy-absorbing foam 1 is compressed. When the abutting portion 102 of the energy-absorbing foam 1 is pressed to a certain extent, since the angle between the depth direction of the fracture groove 103 and the direction in which the energy-absorbing foam 1 bears the impact force is not a right angle, the impact force has a decomposition force perpendicular to the groove wall of the fracture groove 103. Under the action of the decomposition force, the energy-absorbing foam 1 can crack from the fracture groove 103 to cause the energy-absorbing space 101 to collapse, thereby causing the energy-absorbing foam 1 to lose its resilience. The energy-absorbing foam 1 can be crushed when subjected to the impact force. While absorbing energy in the early stage, it will not generate resilience in the later stage, thereby avoiding secondary damage to the legs.
[0028] Please refer to the attached Figure 2 In certain embodiments of the present application, the energy absorbing space 101 has an opening 1011 ; the portion of the energy absorbing foam 1 surrounding the opening 1011 forms the abutting portion 102 .
[0029] Please see attached Figure 2 , attached Figure 2The 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 where the openings 1011 are located.
[0030] Please see attached Figure 1 It should be noted that the extending direction of the energy absorbing foam 1 is parallel to the extending direction of the anti-collision beam 2 , and along the extending direction of the energy absorbing foam 1 , the energy absorbing foam 1 has two opposite opening ends.
[0031] The energy-absorbing space with the opening 1011 can happen to form a circumferentially closed area with the anti-collision beam 2. There is no need to set additional materials at the opening 1011. While ensuring that the energy-absorbing foam 1 can collapse due to the existence of the energy-absorbing space, the material usage of the energy-absorbing foam 1 is greatly saved.
[0032] Of course, the energy absorbing space may also be configured to be closed along its circumference; in this case, the surrounding wall of the energy absorbing foam 1 surrounding the energy absorbing space and close to the anti-collision beam 2 forms an abutment portion 102 .
[0033] Please refer to the attached Figure 1-3 In some embodiments of the present application, the cross-sectional shape of the energy-absorbing foam 1 is C-shaped. As mentioned above, the energy-absorbing foam 1 has a regular shape, which is not only convenient for production and processing, but also convenient for installation and assembly.
[0034] Please refer to the attached Figure 2 In some embodiments of the present application, the groove depth direction of the fracture groove 103 is the same as the opening direction of the energy absorption space 101.
[0035] It should be noted that the opening direction of the energy absorbing space 101 refers to a direction perpendicular to the plane where the opening 1011 of the energy absorbing space 101 is located, which direction happens to be parallel to the direction of the impact force from the bumper skin to the anti-collision beam 2.
[0036] As mentioned above, it is ensured that the direction of the impact force from the bumper skin to the anti-collision beam 2 is parallel to the groove depth direction of the fracture groove 103, so that the angle between the two is 0°, so that the impact force will be applied vertically to the fracture groove 103, thereby ensuring that the stress in the stress concentration area of the energy-absorbing foam 1 is maximized when the impact force is applied, and then the energy-absorbing foam 1 can be quickly cracked from the fracture groove 103, thereby achieving the collapse of the energy-absorbing foam 1, and preventing the energy-absorbing foam 1 from rebounding to cause secondary damage to the human body's legs.
[0037] Of course, the depth direction of the fracture groove 103 may not be the same as the opening direction of the energy absorbing space 101, so that the two have a non-vertical angle to ensure that when subjected to impact force, the energy absorbing foam 1 can crack from the fracture groove 103 to cause it to collapse. The specific setting form will not be repeated one by one.
[0038] Please refer to the attached Figure 2In some embodiments of the present application, the fracture groove 103 is formed on the outer wall of the energy absorbing foam 1. The fracture groove 103 is formed on the outer wall of the energy absorbing foam 1, which facilitates the molding process of the fracture groove 103 and effectively improves the manufacturing efficiency.
[0039] The energy-absorbing foam 1 with a C-shaped cross section has a symmetry axis. Preferably, the fracture groove 103 is provided on the outer wall of the energy-absorbing foam 1 across which the symmetry axis spans; as described above, it is ensured that the fracture groove 103 is provided at the part of the energy-absorbing foam 1 that is most protruding toward the bumper skin; when the impact force from the bumper skin to the anti-collision beam 2 is received, the fracture groove 103 is firstly received by the impact force, thereby ensuring that the fracture groove 103 is rapidly cracked.
[0040] Please refer to the attached Figure 3 Of course, the fracture groove 103 can also be opened on the inner wall of the energy absorbing foam 1. Of course, the fracture groove 103 can also be opened at other positions instead of on the wall spanned by the symmetry axis, so as to ensure that when the energy absorbing foam 1 is subjected to impact force, it can be cracked from the fracture groove 103 to cause it to collapse. The specific setting forms will not be described one by one.
[0041] Please refer to the attached Figure 1-3 In some embodiments of the present application, the cross-sectional shape of the fracture groove 103 is any one of an isosceles trapezoid, a C shape, a U shape, and a V shape.
[0042] As mentioned above, the fracture groove 103 forms an expanded notch, which can guide the stress to concentrate at the fracture groove 103, so that the material of the portion of the energy-absorbing foam 1 corresponding to the fracture groove 103 (i.e., the stress concentration area) first reaches yield or destruction, realizing a predetermined failure mode, and further realizing the effect of the energy-absorbing foam 1 cracking from the fracture groove 103 to its collapse.
[0043] Of course, the cross-sectional shape of the fracture groove 103 may also be a rectangle, or other irregular shapes, which will not be described in detail here.
[0044] In some embodiments of the present application, the fracture groove 103 is parallel to the extension direction of the energy absorbing foam 1 and penetrates the energy absorbing foam 1. As described above, along the extension direction of the energy absorbing foam 1, the energy absorbing foam 1 collapses as a whole and cracks into two parts, and there is no local rebound area, which fully ensures the safety of pedestrians.
[0045] In some embodiments, a plurality of collapse grooves 103 are arranged at intervals along the extension direction of the energy absorbing foam 1 .
[0046] When the energy-absorbing foam 1 is subjected to impact force, the portion of the energy-absorbing foam 1 corresponding to the fracture groove 103 can crack, and it can be ensured that the area between adjacent fracture grooves 103 also cracks; as above, the energy-absorbing foam 1 collapses as a whole and cracks into two parts along the extension direction of the energy-absorbing foam 1. The energy-absorbing foam 1 no longer has any local rebound area, which fully ensures the safety of pedestrians.
[0047] In summary, the present application also discloses a bumper assembly, which 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; the energy-absorbing foam 1 is the energy-absorbing foam described above.
[0048] 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.
[0049] In certain embodiments of the present application, the abutting portion 102 of the energy absorbing foam 1 is adhesively fixed to the anti-collision beam 2 .
[0050] It should be noted that the abutting portion 102 of the energy absorbing foam 1 is attached to the side wall of the anti-collision beam 2, which can ensure the close attachment of the abutting portion 102 to the side wall of the anti-collision beam 2, thereby ensuring the firm fixation of the energy absorbing foam 1 on the anti-collision beam 2. Furthermore, the adhesive fixation method is simple, which can not only realize the firm fixation of the energy absorbing foam 1 and the anti-collision beam 2, but also facilitate processing and assembly, saving time and effort.
[0051] In summary, the present application also discloses a vehicle; the vehicle includes the bumper assembly described above.
[0052] 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.
[0053] 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.
[0054] 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.
[0055] 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.
[0056] 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.
[0057] 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.
[0058] 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: The energy absorbing foam (1) is used to be arranged between a bumper skin and an anti-collision beam (2), the energy absorbing foam (1) encloses an energy absorbing space (101), and has an abutment portion (102) for cooperating with the anti-collision beam (2), and a fracture groove (103) is provided on the energy absorbing foam (1), and the angle between the groove depth direction of the fracture groove (103) and the direction of the energy absorbing foam (1) bearing the impact force is non-right angle.
2. The energy-absorbing foam according to claim 1, characterized in that The energy absorbing space (101) has an opening (1011), and the portion of the energy absorbing foam (1) surrounding the opening (1011) forms the abutment portion (102).
3. The energy-absorbing foam according to claim 2, characterized in that: The cross-sectional shape of the energy-absorbing foam (1) is C-shaped.
4. The energy absorbing foam according to claim 2, characterized in that The groove depth direction of the collapse groove (103) is the same as the opening direction of the energy absorption space (101).
5. The energy absorbing foam according to claim 1, characterized in that The collapse groove (103) is formed on the outer wall of the energy absorbing foam (1).
6. The energy absorbing foam according to claim 1, characterized in that The cross-sectional shape of the fracture groove (103) is any one of an isosceles trapezoid, a C-shape, a U-shape, and a V-shape.
7. The energy absorbing foam according to claim 1, characterized in that The fracture groove (103) is parallel to the extension direction of the energy absorbing foam (1) and penetrates the energy absorbing foam (1).
8. A bumper assembly, characterized in that: It 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); the energy-absorbing foam (1) is the energy-absorbing foam described in any one of claims 1 to 7.
9. The bumper assembly according to claim 8, characterized in that: The abutment portion (102) of the energy absorbing foam (1) is adhesively fixed to the anti-collision beam (2).
10. A vehicle, characterized in that: A bumper assembly comprising any one of claims 8-9.