Vehicle body front end energy absorption structure and vehicle

Abstract

The invention discloses a vehicle body front end energy absorption structure which comprises a front anti-collision beam and an energy absorption structure body, the energy absorption structure body is arranged between the front anti-collision beam and a front protection assembly, and the energy absorption structure body is arranged to deform after being extruded by the front protection assembly and is used for absorbing energy in the collision process. According to the vehicle body front end energy absorption structure, by arranging the energy absorption structure body, the buffering effect is achieved in the collision process of the legs of a pedestrian and a vehicle, it is ensured that collision energy is effectively and gently absorbed in a limited space in the collision process, and damage to the legs of the pedestrian is reduced; meanwhile, a good protection effect is also achieved on low-speed collision with stricter insurance requirements; in the low-speed collision process, the energy absorption structure at the front end of the vehicle body can also play a role in buffering and energy absorption and is easy to replace, and the maintenance cost is reduced. The invention further discloses a vehicle.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology. Specifically, this invention relates to an energy-absorbing structure at the front of a vehicle body and a vehicle. Background Technology

[0002] To protect vulnerable groups in road traffic, such as pedestrians, cyclists, and motorcyclists, an increasing number of countries are incorporating pedestrian protection performance into their licensing regulations, and new vehicle evaluation procedures are also including pedestrian protection performance indicators. The main licensing regulations related to pedestrian protection include ECE R127 and GB 24550-2024. New vehicle development must address these licensing regulations, ensuring that pedestrian protection meets the requirements for vehicles to be legally sold in these regions.

[0003] The upper leg area is a test zone in the pedestrian protection test for the GB24550 / ECER127 access regulations and E-NCAP star rating evaluation. It uses an upper leg impactor for testing, and its evaluation indicators are the instantaneous total impact force and bending moment during the collision. The GB24550 / ECER127 regulations specify an upper leg impact energy of up to 586J. Assuming the impactor does not bounce during the collision and the impact force is uniformly 7.5KN throughout the process, the theoretically required space can be calculated using the energy formula to be no less than 80mm, while the space in the upper leg test area is generally only about 100mm.

[0004] The existing energy-absorbing structure at the front of the vehicle body cannot effectively and smoothly absorb the collision energy within a limited space during a collision, resulting in the inability to ensure that the impact force received by the upper leg during a collision meets regulatory requirements.

[0005] The aim is to provide an energy-absorbing structure for the front end of a vehicle body, particularly regarding how to ensure the effective and gradual absorption of collision energy within a confined space during a collision, thereby ensuring that the impact force on the upper leg during a collision does not meet regulatory requirements. Summary of the Invention

[0006] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention provides an energy-absorbing structure at the front end of a vehicle body, designed to ensure the effective and gradual absorption of collision energy within a confined space during a collision, thereby reducing leg injuries to pedestrians.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a front-end energy-absorbing structure of the vehicle body, including a front anti-collision beam and an energy-absorbing structure body, wherein the energy-absorbing structure body is disposed between the front anti-collision beam and the front bumper assembly, and the energy-absorbing structure body is configured to deform after being squeezed by the front bumper assembly, so as to absorb energy during the collision process.

[0008] The energy-absorbing structure body is provided with weakening holes, and multiple weakening holes are provided.

[0009] The energy-absorbing structure body includes a first energy-absorbing part, a second energy-absorbing part connected to the first energy-absorbing part, and a third energy-absorbing part connected to the second energy-absorbing part. The weakening holes are provided on the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part.

[0010] The length directions of the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part are parallel to the Y direction. All the weakening holes provided on the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part are arranged sequentially along the length directions of the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part and are equally spaced.

[0011] The first energy-absorbing part is perpendicular to the Z-direction, and the second energy-absorbing part is parallel to the Z-direction.

[0012] The third energy-absorbing part has an arc-shaped structure.

[0013] The energy-absorbing structure body also includes a fourth energy-absorbing part and a fifth energy-absorbing part connected to each other. Two fourth energy-absorbing parts and two fifth energy-absorbing parts are provided. The two fourth energy-absorbing parts and the two fifth energy-absorbing parts are respectively fixedly connected to the two ends of the first energy-absorbing part. The weakening holes are provided on the fourth energy-absorbing part and the fifth energy-absorbing part.

[0014] The energy-absorbing structure body also includes a first connecting part, which is connected to the front anti-collision beam, the first energy-absorbing part and the fourth energy-absorbing part.

[0015] The energy-absorbing structure body also includes a second connecting part, which is connected to the front anti-collision beam and the third energy-absorbing part.

[0016] The present invention also provides a vehicle including the aforementioned energy-absorbing structure at the front end of the vehicle body.

[0017] The energy-absorbing structure at the front of the vehicle body of this invention acts as a buffer during a collision between a pedestrian's legs and the vehicle, ensuring that the collision energy is effectively and gently absorbed within a limited space, thus reducing the injury to the pedestrian's legs. At the same time, it also provides good protection for low-speed collisions with more stringent insurance requirements. In low-speed collisions, this energy-absorbing structure at the front of the vehicle body can also play a role in buffering and absorbing energy, and it is easy to replace, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the energy-absorbing structure at the front of the vehicle body in Embodiment 1;

[0019] Figure 2 This is a schematic diagram of the energy-absorbing structure body in Embodiment 1;

[0020] Figure 3 This is a front view of the energy-absorbing structure body of Embodiment 1;

[0021] Figure 4 This is a side view of the energy-absorbing structure body of Embodiment 1;

[0022] Figure 5 This is a top view of the energy-absorbing structure body in Embodiment 1;

[0023] Figure 6 This is a rear view schematic diagram of the energy-absorbing structure at the front of the vehicle body in Embodiment 1;

[0024] Figure 7 This is a schematic diagram of the collision simulation of the energy-absorbing structure in Example 1;

[0025] Figure 8 This is a front view of the front retainer structure in Embodiment 2;

[0026] Figure 9 This is a partial front view of the slider structure when it is connected to the front guard body in Embodiment 2;

[0027] Figure 10 This is a partial rear view of the slider structure when it is connected to the front guard body in Embodiment 2;

[0028] Figure 11 This is a schematic diagram of the slider structure connected to the front guard body in Embodiment 2 from a first-view perspective;

[0029] Figure 12 yes Figure 11 Top view;

[0030] Figure 13 yes Figure 11 Another perspective of the axonometric drawing;

[0031] The markings in the above figures are as follows: 1. Energy-absorbing structure body; 2. Weakening hole; 3. Mounting hole; 4. Bolt; 5. Front bumper beam; 6. First energy-absorbing part; 7. Second energy-absorbing part; 8. Third energy-absorbing part; 9. Fourth energy-absorbing part; 10. Fifth energy-absorbing part; 11. First connecting part; 12. Second connecting part; 13. Front bumper body; 14. Sliding block structure; 15. Guide slider; 16. Guide slope; 17. Front bumper body; 18. Overlapping flange; 19. Material reduction groove; 20. Reinforcing beam. Detailed Implementation

[0032] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," and similar expressions used in this document are for illustrative purposes only.

[0034] It should be noted that in the following embodiments, the X direction is parallel to the length direction of the vehicle body, the Y direction is parallel to the width direction of the vehicle body, and the Z direction is perpendicular to the X and Y directions. The terms "first," "second," "third," "fourth," and "fifth" do not represent an absolute distinction in structure and / or function, nor do they represent a sequential execution order, but are merely for the convenience of description.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Example 1

[0037] Firstly, such as Figures 1 to 7 As shown, this embodiment of the invention provides an energy-absorbing structure for the front end of a vehicle body, including a front bumper beam 5 and an energy-absorbing structure body 1. The energy-absorbing structure body 1 has multiple weakening holes 2. The energy-absorbing structure body 1 is disposed between the front bumper beam 5 and the front bumper assembly. The energy-absorbing structure body 1 is configured to deform after being compressed by the front bumper assembly to absorb energy during a collision.

[0038] Specifically, such as Figures 2 to 6 As shown, the energy-absorbing structure body 1 includes a first energy-absorbing part 6, a second energy-absorbing part 7 connected to the first energy-absorbing part 6, and a third energy-absorbing part 8 connected to the second energy-absorbing part 7. Weakening holes 2 are provided on the first energy-absorbing part 6, the second energy-absorbing part 7, and the third energy-absorbing part 8. The length directions of the first energy-absorbing part 6, the second energy-absorbing part 7, and the third energy-absorbing part 8 are parallel to the Y-direction. All the weakening holes 2 provided on the first energy-absorbing part 6 are arranged sequentially and equidistantly along the length direction of the first energy-absorbing part 6. All the weakening holes 2 provided on the second energy-absorbing part 7 are arranged sequentially and equidistantly along the length direction of the second energy-absorbing part 7. All the weakening holes 2 provided on the third energy-absorbing part 8 are arranged sequentially and equidistantly along the length direction of the third energy-absorbing part 8.

[0039] In embodiments of the present invention, such as Figures 2 to 6As shown, the first energy-absorbing part 6 is perpendicular to the Z-direction and parallel to the X-direction, while the second energy-absorbing part 7 is parallel to the Z-direction. The upper end of the second energy-absorbing part 7 is fixedly connected to the end of the first energy-absorbing part 6, and the lower end of the second energy-absorbing part 7 is fixedly connected to the upper end of the third energy-absorbing part 8. The first energy-absorbing part 6 is located above the third energy-absorbing part 8, and the second energy-absorbing part 7 is arranged opposite to the front bumper beam 5. The third energy-absorbing part 8 has an arc-shaped structure, and its axis is parallel to the Y-direction, which can effectively transfer the impact force after a collision. This energy-absorbing structure body 1 has a simple structural design, can play a significant role in buffering and absorbing energy after a collision, and is convenient to arrange in the limited space between the front bumper assembly and the front bumper beam 5. The energy-absorbing structure body 1 has a C-shaped cross-section, which not only conforms to the structural characteristics of the front of a car but also can more effectively disperse and absorb collision energy. The C-shaped design of the energy-absorbing structure body 1 may provide a wider contact area, thereby increasing the energy absorption effect.

[0040] In embodiments of the present invention, such as Figures 2 to 6 As shown, the energy-absorbing structure body 1 also includes a fourth energy-absorbing part 9 and a fifth energy-absorbing part 10 connected to each other, with two of each. A first energy-absorbing part 6 is located between the two fourth energy-absorbing parts 9, and the two fourth energy-absorbing parts 9 are fixedly connected to both ends of the first energy-absorbing part 6 along its length. The first energy-absorbing part 6 is located between the two fifth energy-absorbing parts 10, and the two fifth energy-absorbing parts 10 are fixedly connected to both ends of the first energy-absorbing part 6 along its length. Each fourth energy-absorbing part 9 is fixedly connected to one fifth energy-absorbing part 10, and there is an angle between the fourth energy-absorbing part 9 and the fifth energy-absorbing part 10, and this angle is less than 180 degrees. Weakening holes 2 are provided on both the fourth energy-absorbing part 9 and the fifth energy-absorbing part 10. The fourth energy-absorbing parts 9 and the fifth energy-absorbing parts 10 are arranged in a V-shape.

[0041] In embodiments of the present invention, such as Figures 2 to 6 As shown, the energy-absorbing structure body 1 also includes a first connecting part 11, which is connected to the front bumper beam 5, the first energy-absorbing part 6, and the fourth energy-absorbing part 9. The first connecting part 11 is located above the front bumper beam 5. One end of the first connecting part 11 is detachably connected to the front bumper beam 5, and the other end is fixedly connected to the lower end of the fourth energy-absorbing part 9. The upper end of the fourth energy-absorbing part 9 is fixedly connected to the upper end of the fifth energy-absorbing part 10, and the lower end of the fifth energy-absorbing part 10 is fixedly connected to the upper end of the second energy-absorbing part 7. The height of the first energy-absorbing part 6 is less than the height of the upper ends of the fourth energy-absorbing part 9 and the fifth energy-absorbing part 10, and the first energy-absorbing part 6 is connected to the fourth energy-absorbing part 9 and the fifth energy-absorbing part 10 by an arc transition. This energy-absorbing structure body 1, with this configuration, can gradually collapse during a collision, thereby smoothly absorbing energy. This gradual collapse process helps reduce the peak impact force, allowing the collision energy to be dispersed more effectively, thus reducing injury to pedestrians and vehicles.

[0042] In embodiments of the present invention, such as Figures 2 to 6 As shown, the energy-absorbing structure body 1 also includes a second connecting part 12, which is connected to the front bumper beam 5 and the third energy-absorbing part 8. The second connecting part 12 is located below the third energy-absorbing part 8, and the upper end of the second connecting part 12 is fixedly connected to the lower end of the third energy-absorbing part 8. The lower end of the first connecting part 11 is detachably connected to the front bumper beam 5.

[0043] In embodiments of the present invention, such as Figures 1 to 6 As shown, the energy-absorbing structure body 1 is fixedly connected to the front bumper beam 5 by bolts 4. Both the first connecting part 11 and the second connecting part 12 are provided with mounting holes 3 through which the bolts 4 pass; multiple mounting holes 3 are provided. The use of bolts 4 for mounting the energy-absorbing structure body 1 means that it can be quickly and easily replaced after collision damage. This not only reduces maintenance costs but also shortens maintenance time and improves vehicle availability.

[0044] In this embodiment of the invention, to ensure the protective function of the component for the upper legs of pedestrians, weakening holes 2 are arranged on the energy-absorbing structure body 1 during the design. The arrangement of these weakening holes 2 ensures that the legs can smoothly absorb energy during the collision with the vehicle, and that the impact force and bending moment do not exceed the regulatory limits. The working principle of the energy-absorbing structure of the present invention, which is beneficial to the protection of the upper legs of pedestrians, is as follows: when the upper legs of a pedestrian collide with a vehicle, as the skin of the front bumper assembly of the vehicle body is squeezed and deformed, it plays a role in buffering and absorbing energy. Since the weakening holes 2 are designed on the energy-absorbing structure body 1, the structure can gradually collapse under the force, smoothly absorbing the energy during the collision process, thereby effectively reducing the impact force and achieving the purpose of protecting the upper legs of pedestrians. The collision simulation process is as follows. Figure 7 As shown in the figure, the left side represents the leg shape of the simulated collision. The energy-absorbing structure designed in this invention can also effectively absorb energy during low-speed collisions, playing a buffering and energy-absorbing role, reducing the degree of damage to the canopy assembly during a collision, and lowering maintenance costs.

[0045] The energy-absorbing structure at the front of the vehicle body described above has the following advantages:

[0046] 1. The structure of this invention provides efficient and stable energy absorption during a collision involving the upper leg of a pedestrian, ensuring that the impact force on the upper leg during the collision meets regulatory requirements.

[0047] 2. The structure of this invention can effectively absorb energy during low-speed collisions, playing a buffering and energy-absorbing role. It is also easy to replace after damage, reducing damage to the front-end module and lowering maintenance costs.

[0048] 3. The structure of this invention is simple, easy to operate, and relatively low in cost. It can be adapted to different vehicle models by adjusting the number and size of the weakening holes 2.

[0049] Secondly, the present invention also provides a vehicle including the aforementioned front-end energy-absorbing structure. This front-end energy-absorbing structure can be referred to... Figures 1 to 7 Further details will not be elaborated here. Since the vehicle of the present invention includes the energy-absorbing structure at the front of the vehicle body as described in the above embodiments, it possesses all the advantages of the aforementioned energy-absorbing structure at the front of the vehicle body.

[0050] Example 2

[0051] like Figures 8 to 13 As shown, in this embodiment of the invention, the front bumper assembly includes a front bumper body 13, on which a slider structure 14 is provided; the slider structure 14 includes at least one guide slider 15 disposed on the front bumper body 13, and the guide slider 15 is provided with a guide ramp 16; the guide ramp 16 is intersecting with the front end face of the front bumper beam 3; the front bumper assembly disclosed in this embodiment of the invention, through the provision of the slider structure 14, can realize that when a pedestrian collision occurs, the slider structure 14 plays a guiding role, so that the protrusion on the front bumper body 13 can be locked between the front bumper body 13 and the front bumper beam 5, thereby reducing excessive damage to the collision victim caused by the excessively large protrusion between the front bumper body 13 and the front bumper beam 5.

[0052] In this embodiment of the invention, a slider structure 14 is added to the front bumper assembly. The slider structure 14 plays a guiding role. The slider structure 14 is arranged opposite to the front bumper beam 5. The purpose is that after a collision occurs at the front of the vehicle, the slider structure 14 plays a good guiding role, which facilitates the partial structure of the front bumper body 13 to pass over the front bumper beam 5 and reduces the amount of foreign objects between the front bumper assembly and the front bumper beam 5.

[0053] In this embodiment of the invention, the slider structure 14 is mainly arranged on the protrusion of the front bumper body 13, and is positioned directly opposite the front anti-collision beam 5. By setting the slider structure 14, the protrusion on this part of the front bumper body 13 can be driven to pass over the front anti-collision beam 5 and the energy-absorbing structure body, thereby better protecting pedestrians from falling.

[0054] In this embodiment of the invention, the slider structure 14 includes at least one guide slider 15 disposed on the front bumper body 13, and the guide slider 15 is provided with a guide slope 16; the guide slope 16 is intersecting with the front end face of the front bumper beam 5; in this invention, one function of the guide slider 15 is to increase the structural strength of the front bumper body 13, and another function is to play a good guiding role, so that the protrusion on the front bumper body 13 can pass over the front bumper beam 5.

[0055] In this embodiment of the invention, the slider structure 14 includes a plurality of guide sliders 15, which are distributed in parallel at intervals. In this invention, the plurality of slider structures 14 are distributed at intervals along the Y direction of the vehicle. Based on this arrangement, protection can be provided in the width direction of the front end of the vehicle, and it can be better used in conjunction with the front anti-collision beam 5.

[0056] In this embodiment of the invention, the slider structure 14 and the front bumper body 13 are integrally formed; based on this setting, the integrity and consistency of the front bumper assembly can be guaranteed, which facilitates the production and processing of the front bumper assembly.

[0057] In this embodiment of the invention, at least one guide slider 15 in the slider structure 14 is located at the center of the lower edge of the front bumper body 13; such a configuration can provide collision protection for the central area of ​​the front end of the vehicle.

[0058] In this embodiment of the invention, the spacing between the guide sliders 15 in the slider structure 14 that are far from the center of the front bumper body 13 is smaller than the spacing between the guide sliders 15 that are close to the center of the front bumper body 13. This setting is mainly because the sliding on both sides of the front bumper body 13 is more difficult. Therefore, by reducing the spacing of the guide sliders 15, the local structural strength of the front bumper body 13 can be increased, making it easier for the front bumper assembly to pass over the front anti-collision beam 5.

[0059] In this embodiment of the invention, each guide slider 15 partially overlaps with the main projection of the front anti-collision beam 5. Based on this design, the lower end of the guide slider 15 extends beyond the front anti-collision beam 5 in the longitudinal height. When a collision occurs, the inclined surface of the guide slider 15 can act on the lower edge of the front anti-collision beam 5, thereby playing a good guiding and limiting role.

[0060] In this embodiment of the invention, the front bumper body 13 includes a front bumper main body 17; the periphery of the front bumper main body 17 is provided with an overlapping flange 18; the front bumper main body 17 is the main structure on the front bumper body 13, and the overlapping flange 18 is provided at the edge of the front bumper main body 17. The overlapping flange 18 plays a good overlapping connection role, which facilitates the overlapping installation between the front bumper body 13 and adjacent plates. At the same time, in this invention, the slider structure 14 is distributed at the connection between the front bumper main body 17 and the overlapping flange 18; such a setting can well ensure the structural strength between the overlapping flange 18 and the front bumper main body 17.

[0061] In this embodiment of the invention, the overlapping flange 18 is provided with a material reduction groove 19, which can reduce the overall weight of the front bumper assembly.

[0062] In this embodiment of the invention, each guide slider 15 corresponds to a material reduction groove 19, which extends from the side of the overlapping flange 18 away from the guide slider 15 toward the interior of the guide slider 15. This arrangement can reduce the overall structural weight of the front bumper assembly while ensuring the structural strength of the front bumper assembly itself.

[0063] In this embodiment of the invention, a reinforcing rib beam 20 is provided on the inner wall of the material reduction groove 19. The reinforcing rib beam 20 plays a good role in strengthening and preventing the setting of the material reduction groove 19 from affecting the structural strength of the guide slider 15.

[0064] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A front-end energy-absorbing structure for a vehicle body, including a front anti-collision beam, characterized in that: It also includes an energy-absorbing structure body, which is disposed between the front bumper beam and the front bumper assembly. The energy-absorbing structure body is configured to deform after being squeezed by the front bumper assembly to absorb energy during the collision.

2. The energy-absorbing structure at the front end of the vehicle body according to claim 1, characterized in that: The energy-absorbing structure body is provided with weakening holes, and multiple weakening holes are provided.

3. The energy-absorbing structure at the front end of the vehicle body according to claim 2, characterized in that: The energy-absorbing structure body includes a first energy-absorbing part, a second energy-absorbing part connected to the first energy-absorbing part, and a third energy-absorbing part connected to the second energy-absorbing part. The weakening holes are provided on the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part.

4. The energy-absorbing structure at the front end of the vehicle body according to claim 3, characterized in that: The length directions of the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part are parallel to the Y direction. All the weakening holes provided on the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part are arranged sequentially along the length directions of the first energy-absorbing part, the second energy-absorbing part, and the third energy-absorbing part and are equally spaced.

5. The energy-absorbing structure at the front end of the vehicle body according to claim 4, characterized in that: The first energy-absorbing part is perpendicular to the Z-direction, and the second energy-absorbing part is parallel to the Z-direction.

6. The energy-absorbing structure at the front end of the vehicle body according to claim 4, characterized in that: The third energy-absorbing part has an arc-shaped structure.

7. The energy-absorbing structure at the front end of the vehicle body according to any one of claims 3 to 6, characterized in that: The energy-absorbing structure body also includes a fourth energy-absorbing part and a fifth energy-absorbing part connected to each other. Two fourth energy-absorbing parts and two fifth energy-absorbing parts are provided. The two fourth energy-absorbing parts and the two fifth energy-absorbing parts are respectively fixedly connected to the two ends of the first energy-absorbing part. The weakening holes are provided on the fourth energy-absorbing part and the fifth energy-absorbing part.

8. The energy-absorbing structure at the front end of the vehicle body according to claim 7, characterized in that: The energy-absorbing structure body also includes a first connecting part, which is connected to the front anti-collision beam, the first energy-absorbing part and the fourth energy-absorbing part.

9. The energy-absorbing structure at the front end of the vehicle body according to claim 8, characterized in that: The energy-absorbing structure body also includes a second connecting part, which is connected to the front anti-collision beam and the third energy-absorbing part.

10. A vehicle, characterized in that: Includes the energy-absorbing structure at the front end of the vehicle body as described in any one of claims 1 to 9.

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