Anti-collision threshold beam of new energy automobile

Abstract

The invention relates to the field of automobile manufacturing, and discloses a new energy automobile anti-collision threshold beam which comprises a front collision plate, the front collision plate is in a U shape, a supporting connecting plate is arranged on the inner side face of the front collision plate, and a longitudinal beam connecting plate is fixedly connected to one end of the side face of the front collision plate. A buffer layer connecting plate is welded to the side, away from the front collision plate, of the supporting connecting plate, a stress dispersion connecting plate is fixedly connected to the side, away from the supporting connecting plate, of the buffer layer connecting plate, and a battery protection soft plate is integrally and fixedly connected to the side, away from the buffer layer connecting plate, of the stress dispersion connecting plate. According to the anti-collision threshold beam of the new energy automobile, the impact resistance of the middle portion is enhanced, middle folding is avoided, and the battery module and passengers are protected; an efficient collision energy transfer path is constructed, and local stress is reduced; due to the design of a multi-layer anti-collision structure, the maintenance cost and the secondary accident risk are reduced.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and in particular to an anti-collision door sill beam for a new energy automobile. Background Art

[0002] With the rapid transformation of the global automotive industry to the new energy field, the safety of new energy vehicles has become the focus of industry attention. As a key component in the side structure of the automobile body, the threshold beam plays an indispensable role in resisting side collisions, protecting the occupants in the car and the vital battery module. In actual road driving scenarios, the side collisions faced by vehicles are complex and diverse, but they can be mainly summarized into two types. One is a full collision facing the threshold beam. In this collision mode, the collision force can be relatively evenly distributed on the entire surface of the threshold beam. Thanks to the development of automotive engineering technology over the years, most of the existing threshold beam designs have a certain strength and anti-collision ability when dealing with this kind of uniformly stressed full collision. Through reasonable material selection and structural design, such as the use of high-strength steel or aluminum alloy materials, combined with structural strengthening measures such as reinforcing ribs and crossbeams, the collision stress can be effectively dispersed, thereby better protecting the automotive battery module and preventing it from being seriously damaged during the collision, providing basic protection for the safety performance of new energy vehicles.

[0003] However, another side collision situation - local collision of the threshold beam, poses a severe challenge to the design of traditional threshold beams. When the collision point is concentrated in the middle area of ​​the threshold beam, due to the structural characteristics and force distribution characteristics of the traditional threshold beam, it is often difficult to withstand such locally concentrated huge impact force. In this case, the threshold beam is very likely to bend in the middle, that is, serious bending and deformation occurs in the middle, resulting in a significant decrease in the stability and bearing capacity of its overall structure. Once the threshold beam is bent in the middle, it will not only fail to effectively transfer and disperse the collision energy to other parts of the vehicle body, but also cause the collision force to directly act on the area where the battery module is located, greatly increasing the risk of damage to the battery module. Damage to the battery module may cause serious consequences such as electrolyte leakage, short circuit and fire, posing a huge threat to the life safety of the occupants in the car, but also causing high vehicle maintenance costs and potential secondary accident risks. For this reason, we propose an anti-collision threshold beam for new energy vehicles. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides an anti-collision door sill beam for a new energy vehicle, which solves the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a collision-proof sill beam for a new energy vehicle, including a front collision plate, the front collision plate is in a U-shape, a support connecting plate is arranged on the inner side surface of the front collision plate, one end of the side surface of the front collision plate is fixedly connected with a longitudinal beam connecting plate, a buffer layer connecting plate is welded and connected to the side of the support connecting plate away from the front collision plate, a stress dispersion connecting plate is fixedly connected to the side of the buffer layer connecting plate away from the support connecting plate, a battery protection soft plate is integrally and fixedly connected to the side of the stress dispersion connecting plate away from the buffer layer connecting plate, a bottom energy absorption plate is fixedly connected to the bottom of the stress dispersion connecting plate, and further includes: a buffer layer, which is arranged in the inner cavity of the buffer layer connecting plate and is used for continuously absorbing and dissipating energy; a stress dispersion and bearing device, the number of which is multiple groups, and there are several in each group and are equidistantly distributed in the inner cavity of the stress dispersion connecting plate and are used for transmitting and dispersing the collision energy to other parts of the vehicle body.

[0008] Preferably, a plurality of collision blocks are fixedly connected to the front side surface of the front collision plate, the collision blocks are in a frustum shape, and the four side surfaces of the collision blocks are inclined towards the surroundings.

[0009] Preferably, the support connecting plate is movably inserted into the inner cavity of the front collision plate, and a plurality of fixing bolts are threadedly connected to both the upper and lower sides of the front collision plate, and the fixing bolts fix the upper and lower surfaces of the support connecting plate to the front collision plate.

[0010] Preferably, the buffer layer includes reinforcing ribs, energy absorption filling material I and a protection plate, a plurality of reinforcing ribs are fixedly connected to the inner cavity of the buffer layer connecting plate, the inner cavity of the buffer layer connecting plate is filled with energy absorption filling material I, a protection plate is fixedly connected to the bottom of the buffer layer connecting plate, and the inner cavity of the protection plate is a hollow structure.

[0011] Preferably, the reinforcing ribs are in a wavy shape, both the buffer layer connecting plate and the reinforcing ribs are made of carbon fiber material, and the material of the energy absorption filling material I is polyurethane foam.

[0012] Preferably, the bottom energy absorption plate is in a mesh shape, the inner cavity of the bottom energy absorption plate is filled with energy absorption filling material II, and the material of the energy absorption filling material II is phenolic foam.

[0013] Preferably, the stress dispersion bearing device includes an extrusion plate, a first stress support plate, a second stress support plate and an energy absorbing support rod, the inner walls on both sides of the stress dispersion connecting plate are fixedly connected with an extrusion plate, the two extrusion plates are in a U-shape and are symmetrically distributed, the inner walls of the extrusion plates are rotatably connected with the first stress support plate and the second stress support plate, the first stress support plate and the second stress support plate are located on the inner wall of the extrusion plate and are hinged to each other, the other ends of the first stress support plate and the second stress support plate are hinged to each other with the first stress support plate and the second stress support plate in the extrusion plate on the other side, and three energy absorbing support rods are fixedly connected to the inner wall of the square frame composed of two groups of the first stress support plates and the second stress support plates.

[0014] Preferably, both sides of the three energy-absorbing support rods are fixedly connected with structural reinforcement connecting rods arranged in an eight-shape, the first stress support plate and the second stress support plate are made of aluminum alloy, the energy-absorbing support rods are made of high-strength alloy steel, and the structural reinforcement connecting rods are made of carbon fiber composite material.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides an anti-collision door sill beam for new energy vehicles, which has the following beneficial effects:

[0017] 1. This anti-collision threshold beam for new energy vehicles improves the ability to resist local collisions. In view of the problem that traditional threshold beams are prone to folding in local collisions, the stress dispersion bearing device and multiple sets of energy-absorbing support rods effectively enhance the impact resistance of the middle area of ​​the threshold beam. This design allows the collision force to be better absorbed and dispersed during local collisions, avoiding the folding of the threshold beam, thereby protecting the safety of the battery module and the passengers in the vehicle.

[0018] 2. This anti-collision threshold beam of a new energy vehicle constructs an efficient collision energy transfer path through the effective connection of the longitudinal beam connecting plate with the longitudinal beam of the vehicle body, as well as the arrangement of the stress dispersion connecting plate and the bottom energy absorption plate. When a collision occurs, the energy can be quickly transferred to other parts of the vehicle body along this path, reducing the situation of local force concentration and the risk of damage to the battery module.

[0019] 3. This anti-collision threshold beam for new energy vehicles can effectively protect key components of the vehicle, such as battery modules and body structures, in the event of a collision through a multi-layer anti-collision structure, which not only reduces the maintenance cost of the vehicle, but also reduces the risk of secondary accidents caused by collisions, and improves the overall safety and reliability of the vehicle.

[0020] 4. This anti-collision threshold beam for new energy vehicles is achieved through the integrated connection of the battery protection soft plate and the stress dispersion connecting plate, as well as the 'M'-shaped design and phenolic foam filling of the bottom energy absorption plate. This device can effectively reduce the impact on the battery module during a collision, absorb and dissipate a large amount of collision energy through the multi-layer structure, protect the integrity of the battery module, and avoid serious consequences such as electrolyte leakage, short circuit and fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0022] Figure 2 It is a schematic diagram of a side cross section of the present invention.

[0023] Figure 3 It is a schematic diagram of the split structure of the front impact plate and the supporting connecting plate of the present invention.

[0024] Figure 4 It is a schematic diagram of the cross section of the buffer layer connecting plate of the present invention.

[0025] Figure 5 It is a side schematic diagram of the stress dispersion connecting plate of the present invention.

[0026] Figure 6 It is a distribution diagram of the stress dispersion bearing device of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the stress dispersion bearing device of the present invention.

[0028] Figure 8 It is a schematic diagram of the split structure of the stress dispersion bearing device of the present invention.

[0029] In the figure: 1. Frontal collision plate; 2. Support connecting plate; 3. Longitudinal beam connecting plate; 4. Buffer layer connecting plate; 5. Stress dispersion connecting plate; 6. Battery protection soft plate; 7. Bottom energy absorption plate; 8. Stress dispersion bearing device; 9. Collision block; 10. Fixing bolt; 11. Reinforcement rib; 12. Energy absorbing filling material 1; 13. Protection plate; 14. Energy absorbing filling material 2; 15. Extrusion plate; 16. First stress support plate; 17. Second stress support plate; 18. Energy absorbing support rod; 19. Structural reinforcement connecting rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Please refer to Figure 1-8 , a collision - proof sill beam for a new - energy vehicle, including a front - collision plate 1. The front - collision plate 1 is in a U - shape. A support connecting plate 2 is arranged on the inner side surface of the front - collision plate 1. One end of the side surface of the front - collision plate 1 is fixedly connected with a longitudinal - beam connecting plate 3. A buffer - layer connecting plate 4 is welded and connected to the side of the support connecting plate 2 away from the front - collision plate 1. A stress - dispersion connecting plate 5 is fixedly connected to the side of the buffer - layer connecting plate 4 away from the support connecting plate 2. A battery - protection soft plate 6 is integrally and fixedly connected to the side of the stress - dispersion connecting plate 5 away from the buffer - layer connecting plate 4. A bottom energy - absorption plate 7 is fixedly connected to the bottom of the stress - dispersion connecting plate 5. It further includes: a buffer layer, which is arranged in the inner cavity of the buffer - layer connecting plate 4 and is used for continuously absorbing and dissipating energy; a stress - dispersion and bearing device 8, the number of which is multiple groups, and in each group, several are evenly distributed in the inner cavity of the stress - dispersion connecting plate 5 and are used for transmitting and dispersing the collision energy to other parts of the vehicle body.

[0032] Furthermore, a plurality of collision blocks 9 evenly distributed are fixedly connected to the front - side surface of the front - collision plate 1. The collision blocks 9 are in a frustum - like shape, and the four side surfaces of the collision blocks 9 are inclined towards the surroundings. The frustum - like design enables the collision blocks 9 to disperse the collision force to the surroundings by using their inclined side surfaces when being impacted from the side, effectively reducing the concentration of local stress, helping to reduce the deformation degree of the sill beam during a collision, and thus protecting the safety of the vehicle occupants and the battery module.

[0033] Furthermore, a plurality of collision blocks 9 evenly distributed are fixedly connected to the front - side surface of the front - collision plate 1. The collision blocks 9 are in a frustum - like shape, and the four side surfaces of the collision blocks 9 are inclined towards the surroundings. The frustum - like design enables the collision blocks 9 to disperse the collision force to the surroundings by using their inclined side surfaces when being impacted from the side, effectively reducing the concentration of local stress, helping to reduce the deformation degree of the sill beam during a collision, and thus protecting the safety of the vehicle occupants and the battery module.

[0034] Furthermore, the buffer layer includes reinforcing ribs 11, energy - absorption filling material I 12, and a protection plate 13. A plurality of reinforcing ribs 11 are fixedly connected in the inner cavity of the buffer - layer connecting plate 4. The inner cavity of the buffer - layer connecting plate 4 is filled with energy - absorption filling material I 12. A protection plate 13 is fixedly connected to the bottom of the buffer - layer connecting plate 4. The inner cavity of the protection plate 13 is a hollow structure. The hollow structure of the protection plate 13 facilitates the formation of a flattened shape during contact collision to disperse the propagation of subsequent stress, enabling the subsequent energy - absorption structure to more effectively absorb and dissipate energy during a collision.

[0035] Furthermore, the reinforcing ribs 11 are in a wavy shape. Both the buffer - layer connecting plate 4 and the reinforcing ribs 11 are made of carbon fiber. The material of the energy - absorption filling material I 12 is polyurethane foam. The wavy design of the reinforcing ribs 11 not only enhances the rigidity of the buffer - layer connecting plate 4 but also helps to absorb and disperse energy during a collision.

[0036] Further, the bottom energy-absorbing plate 7 is in the shape of a Chinese character 'Mu', and the inner cavity of the bottom energy-absorbing plate 7 is filled with the second energy-absorbing filling material 14. The material of the second energy-absorbing filling material 14 is phenolic foam. The design of the bottom energy-absorbing plate 7 adopts the structure of a Chinese character 'Mu', which not only ensures the rigidity of the bottom energy-absorbing plate 7 but also provides enough space for filling phenolic foam in its inner cavity. As an excellent energy-absorbing material, phenolic foam has the characteristics of low density, good energy-absorbing effect, high temperature resistance, etc., and can further absorb and dissipate energy during a collision to protect the battery module from impact.

[0037] Further, the stress dispersion and bearing device 8 includes a pressing plate 15, a first stress support plate 16, a second stress support plate 17, and an energy-absorbing support rod 18. Pressing plates 15 are fixedly connected to the inner walls on both sides of the stress dispersion connecting plate 5. Both pressing plates 15 are in a 'C' shape and are symmetrically distributed. The inner walls of the pressing plates 15 are rotatably connected to the first stress support plate 16 and the second stress support plate 17. The first stress support plate 16 and the second stress support plate 17 are hinged to each other on the inner walls of the pressing plates 15. The other ends of the first stress support plate 16 and the second stress support plate 17 are respectively hinged to the first stress support plate 16 and the second stress support plate 17 in the other pressing plate 15. Three energy-absorbing support rods 18 are fixedly connected to the inner wall of the square frame formed by the two groups of the first stress support plate 16 and the second stress support plate 17. The 'C' shape design of the pressing plate 15 provides an installation basis for the first stress support plate 16 and the second stress support plate 17 and a shape guide during subsequent deformation. The fixed connection of the first stress support plate 16, the second stress support plate 17, and the energy-absorbing support rod 18 further enhances the rigidity and energy-absorbing capacity of the square frame, enabling the stress dispersion and bearing device 8 to more effectively protect the battery module from impact during a collision.

[0038] Further, structure strengthening connecting rods 19 arranged in a shape like the Chinese character 'Ba' are fixedly connected to both sides of the three energy-absorbing support rods 18. The material of the first stress support plate 16 and the second stress support plate 17 is aluminum alloy, the material of the energy-absorbing support rod 18 is high-strength alloy steel, and the material of the structure strengthening connecting rod 19 is carbon fiber composite material.

[0039] Working principle: As an innovative automotive safety structure design, this device aims to effectively address the challenges posed by side collisions, especially local collisions, to ensure the safety of vehicle occupants and battery modules. The front collision plate 1 of this sill beam is overall in a U-shaped design. This design not only enhances the structural rigidity but also provides favorable geometric conditions for subsequent collision energy absorption and dispersion. On the inner side, there is a support connecting plate 2, which is tightly connected to the front collision plate 1 through fixing bolts 10, ensuring the stability and integrity of the structure. One side of the side of the front collision plate 1 is fixedly connected with a longitudinal beam connecting plate 3. This design enables the sill beam to be effectively connected to the vehicle body longitudinal beam, thereby transmitting the collision energy to other parts of the vehicle body. On the front side of the front collision plate 1, there are also multiple collision blocks 9 fixedly connected at equal intervals. They are in a frustum shape and the four sides are inclined towards the surroundings. When a collision occurs, the collision blocks 9 can guide the collision force to disperse in all directions, reducing the concentration of local stress. On the side of the support connecting plate 2 away from the front collision plate 1, there is a buffer layer connecting plate 4 welded. This is the second line of defense of the anti-collision structure. The reinforcing rib 11 is in a wavy shape and, together with the buffer layer connecting plate 4 made of carbon fiber material, effectively absorbs and disperses the initial collision energy. The energy-absorbing filling material 12 is made of polyurethane foam. Its good energy-absorbing characteristics can further attenuate the collision impact force. The protection plate 13 serves as the bottom support of the buffer layer. Its hollow structure design helps to reduce weight while maintaining sufficient strength. On the side of the buffer layer connecting plate 4 away from the support connecting plate 2, there is a stress dispersion connecting plate 5 fixedly connected. At the bottom of the stress dispersion connecting plate 5, there is an integrated battery protection soft plate 6, which is used to directly protect the battery module from collision impact. At the same time, at the bottom of the stress dispersion connecting plate 5, there is also a bottom energy-absorbing plate 7, which is in a grid shape design and the inner cavity is filled with phenolic foam to further absorb and dissipate the collision energy.

[0040] In the inner cavity of the stress dispersion connecting plate 5, there are multiple groups of stress dispersion bearing devices 8. In each group, there are several arranged at equal intervals. When a local collision occurs, the collision force first acts on the extrusion plate 15, and then through the hinge structure of the first stress support plate 16 and the second stress support plate 17, the collision energy is transmitted to the energy-absorbing support rod 18. The energy-absorbing support rod 18 absorbs and dissipates part of the collision energy during this process. After being impacted, the first stress support plate 16 and the second stress support plate 17 conduct the stress to the energy-absorbing support rod 18. After the structure formed by the energy-absorbing support rod 18 and the structure strengthening connecting rod 19 absorbs the stress and is damaged, the first stress support plate 16 and the second stress support plate 17 contract at the angle. The two groups of first stress support plates 16 and second stress support plates 17 form a straight line. The two groups of first stress support plates 16 and second stress support plates 17 that form a straight line spread the stress received, guiding the collision force to disperse in all directions, reducing the concentration of local stress and reducing the impact on the battery module.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle anti-collision threshold beam, comprising a front collision plate (1), characterized in that: The front collision plate (1) is in a U shape. A support connection plate (2) is arranged on the inner side surface of the front collision plate (1). One end of the side surface of the front collision plate (1) is fixedly connected with a longitudinal beam connection plate (3). A buffer layer connection plate (4) is welded and connected to the side of the support connection plate (2) away from the front collision plate (1). A stress dispersion connection plate (5) is fixedly connected to the side of the buffer layer connection plate (4) away from the support connection plate (2). A battery protection soft plate (6) is integrally and fixedly connected to the side of the stress dispersion connection plate (5) away from the buffer layer connection plate (4). A bottom energy absorption plate (7) is fixedly connected to the bottom of the stress dispersion connection plate (5). Further included are: A buffer layer, which is arranged in the inner cavity of the buffer layer connection plate (4) and is used for continuously absorbing and dissipating energy; A stress dispersion and bearing device (8), the number of which is multiple groups. In each group, several are evenly distributed in the inner cavity of the stress dispersion connection plate (5) and are used for transferring and dispersing the collision energy to other parts of the vehicle body.

2. The anti-collision sill beam for new energy vehicles according to claim 1, characterized in that: A plurality of collision blocks (9) evenly distributed are fixedly connected to the front side surface of the front collision plate (1). The collision blocks (9) are in a frustum shape, and the four side surfaces of the collision blocks (9) are inclined towards the surroundings.

3. The anti-collision sill beam for new energy vehicles according to claim 1, characterized in that: The support connection plate (2) is movably inserted into the inner cavity of the front collision plate (1). A plurality of fixing bolts (10) are threadedly connected to both the upper and lower sides of the front collision plate (1). The fixing bolts (10) fixedly connect the upper and lower surfaces of the support connection plate (2) to the front collision plate (1).

4. The anti-collision sill beam for new energy vehicles according to claim 1, characterized in that: The buffer layer includes reinforcing ribs (11), energy absorption filling material I (12), and a protection plate (13). A plurality of reinforcing ribs (11) are fixedly connected in the inner cavity of the buffer layer connection plate (4). The inner cavity of the buffer layer connection plate (4) is filled with energy absorption filling material I (12). A protection plate (13) is fixedly connected to the bottom of the buffer layer connection plate (4). The inner cavity of the protection plate (13) is a hollow structure.

5. The anti-collision sill beam for new energy vehicles according to claim 4, characterized in that: The reinforcing ribs (11) are in a wavy shape. Both the buffer layer connection plate (4) and the reinforcing ribs (11) are made of carbon fiber material. The material of the energy absorption filling material I (12) is polyurethane foam.

6. The anti-collision sill beam for new energy vehicles according to claim 1, characterized in that: The bottom energy absorption plate (7) is in a mesh shape. The inner cavity of the bottom energy absorption plate (7) is filled with energy absorption filling material II (14). The material of the energy absorption filling material II (14) is phenolic foam.

7. The anti-collision sill beam for new energy vehicles according to claim 1, characterized in that: The stress dispersion bearing device (8) includes an extrusion plate (15), a first stress support plate (16), a second stress support plate (17), and an energy absorption support rod (18). Extrusion plates (15) are fixedly connected to the inner walls on both sides of the stress dispersion connecting plate (5). Both of the two extrusion plates (15) are in a U shape and are symmetrically distributed. The inner walls of the extrusion plates (15) are rotatably connected to a first stress support plate (16) and a second stress support plate (17). The first stress support plate (16) and the second stress support plate (17) are hinged to each other on the inner walls of the extrusion plates (15). The other ends of the first stress support plate (16) and the second stress support plate (17) are respectively hinged to the first stress support plate (16) and the second stress support plate (17) in the other extrusion plate (15). Three energy absorption support rods (18) are fixedly connected to the inner walls of the square frame formed by the two groups of the first stress support plates (16) and the second stress support plates (17).

8. The anti-collision sill beam for new energy vehicles according to claim 7, characterized in that: Structural strengthening connecting rods (19) arranged in a V shape are fixedly connected to both sides of the three energy absorption support rods (18). The first stress support plate (16) and the second stress support plate (17) are made of aluminum alloy. The energy absorption support rod (18) is made of high-strength alloy steel. The structural strengthening connecting rod (19) is made of carbon fiber composite material.

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