Threshold stiffening beam and vehicle

Abstract

The invention provides a threshold stiffening beam and a vehicle. The doorsill stiffening beam comprises a main beam body and a buffer body wrapping the outer portion of the main beam body. The buffering body is of a multi-cavity structure, and all cavities on the buffering body are densely arranged in the length direction and the height direction of the doorsill stiffening beam. According to the doorsill stiffening beam, by arranging the main beam body, a good basic framework can be formed, and the structural strength of the doorsill beam is improved; according to the doorsill stiffening beam, the buffering body of the multi-cavity structure is arranged outside the main beam body, the structural performance and the buffering performance of the doorsill stiffening beam can be effectively improved, the cavities are densely arranged in the length direction and the width direction of the doorsill stiffening beam, and when the doorsill stiffening beam is arranged in the inner cavity of the doorsill beam, the buffering performance of the doorsill stiffening beam can be effectively improved. Collision impact from the side portion of a vehicle can be effectively relieved due to collapsing deformation of the upper cavity of the buffering body, and therefore the structural performance and the buffering effect of the doorsill beam can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body structures, and in particular to a door sill reinforcement beam. In addition, the present invention also relates to a vehicle. Background Art

[0002] With the development of technology, people have higher and higher requirements for the safety performance of vehicles. In the event of a traffic accident, the probability of a collision is high. Once a collision occurs, the risk of injury to the occupants will be greater; therefore, in the process of vehicle model development, it is necessary to analyze and design the body structure to reduce the damage to the occupants in the event of an accident.

[0003] The rocker beam structure plays a vital role in the side collision of the car. When a side collision occurs, since there are no buffering and energy-absorbing parts on both sides of the car body like the front and rear compartments, the rocker beam is usually strengthened to alleviate the high impact energy caused by the side collision.

[0004] In the prior art, a threshold reinforcement beam is usually arranged in the inner cavity of the threshold beam; the threshold beam is usually formed by the side panel reinforcement plate at the bottom of the side panel assembly and the inner panel of the threshold beam, and the inner cavity of the threshold beam is formed between the two. The threshold reinforcement beam is arranged in the inner cavity to improve the structural strength and buffering energy absorption effect of the threshold beam. However, the existing threshold reinforcement beam structure and materials are relatively simple, and the structural strength and buffering energy absorption effect are insufficient; at the same time, the impact force caused by the side collision comes from the width direction of the vehicle, and the insufficient performance of the threshold reinforcement beam is still easy to cause the threshold beam to bend and deform, thereby endangering the safety of the driver and passengers. Therefore, it is very necessary to design a vehicle threshold beam reinforcement structure with excellent structure, which can effectively improve the safety performance of the side of the vehicle body and provide good protection against impacts from the side of the vehicle body. Summary of the invention

[0005] In view of this, the present invention aims to provide a door sill reinforcement beam to improve the structural performance and buffering effect of the door sill beam.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A threshold reinforcement beam comprises a main beam body and a buffer body wrapped around the outside of the main beam body;

[0008] The buffer body adopts a multi-cavity structure, and the cavities on the buffer body are densely arranged in the length and height directions of the door sill reinforcement beam.

[0009] Furthermore, a cavity is provided inside the main beam body.

[0010] Furthermore, the cross-section of the main beam body is rectangular, and the buffer body includes an upper buffer body wrapped around the top of the main beam body, a side buffer body wrapped around one side of the main beam body, and a lower buffer body wrapped around the bottom of the main beam body.

[0011] Furthermore, the projection of the upper buffer body in the length direction of the rocker reinforcement beam is trapezoidal; and / or, the projections of the side buffer body and the lower buffer body in the length direction of the rocker reinforcement beam are rectangular; and / or, the side buffer body has at least two layers of the chambers arranged vertically.

[0012] Furthermore, the buffer body is constructed by crisscrossing plates, and each chamber is surrounded by adjacent plates.

[0013] Furthermore, each of the chambers is extended in the width direction of the door sill reinforcement beam.

[0014] Furthermore, each of the chambers is open at least at one end.

[0015] Furthermore, the main beam body is made of continuous fiber reinforced composite material; and / or the buffer body is integrally formed of nylon material.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The threshold reinforcement beam of the present invention can form a good basic skeleton by setting a main beam body, thereby improving the structural strength of the threshold beam; a buffer body with a multi-cavity structure is set outside the main beam body, which can effectively improve the structural performance and buffering performance of the threshold reinforcement beam, and the chambers are densely arranged in the length direction and width direction of the threshold reinforcement beam. When the threshold reinforcement beam is arranged in the inner cavity of the threshold beam, the collision impact from the side of the vehicle can be effectively alleviated due to the collapse deformation of the chamber on the buffer body, thereby helping to improve the structural performance and buffering effect of the threshold beam.

[0018] In addition, the main beam and buffer body are made of composite nylon material, which makes it easy to manufacture any shape of structural parts through injection molding, and then effectively bond them to the sheet metal parts of the threshold beam through structural adhesive. The use of composite materials not only ensures the structural performance and buffer performance of the threshold reinforcement beam, but also has a high level of lightweight, which is about 40% lighter than the steel threshold reinforcement beam and about 20% lighter than the aluminum threshold reinforcement beam.

[0019] Another object of the present invention is to provide a vehicle, wherein the interior of the vehicle's rocker beam is hollow to form an inner cavity; the rocker reinforcement beam of the present invention is arranged in the inner cavity.

[0020] Furthermore, the buffer body is coated on at least one side of the main beam body facing the outside of the vehicle, and the buffer body is bonded to the inner wall of the inner cavity by epoxy resin structural adhesive.

[0021] The vehicle of the present invention has the technical advantages of the above-mentioned threshold reinforcement beam. In addition, since the impact from the side of the vehicle will first act on the side reinforcement plate on the outer side of the threshold beam, a buffer body is provided at least on the side of the main beam body facing the outside of the vehicle (i.e., the side facing the side reinforcement plate), and the buffer body is directly bonded to the inner wall of the buffer body (i.e., the side reinforcement plate), which can effectively absorb the impact force on the side reinforcement plate, thereby better exerting the buffering performance of the threshold reinforcement beam and reducing the degree of deformation of the threshold beam caused by the impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, up and down, etc. involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the door sill reinforcement beam according to the first embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the door sill reinforcement beam according to the first embodiment of the present invention from another viewing angle;

[0025] Figure 3 This is a schematic diagram of the split structure of the door sill reinforcement beam according to the first embodiment of the present invention;

[0026] Figure 4 A top view of the door sill reinforcement beam according to the first embodiment of the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the part indicated by AA;

[0028] Figure 6 This is a schematic diagram of the overall structure of the threshold reinforcement beam according to the second embodiment of the present invention, which is arranged in the threshold beam;

[0029] Figure 7 This is a schematic diagram of the internal structure of the threshold beam according to the second embodiment of the present invention;

[0030] Figure 8 for Figure 6 Schematic diagram of the disassembled structure of each component shown.

[0031] Description of reference numerals:

[0032] 1. Door sill beam; 10. Door sill beam inner plate; 11. Side wall reinforcement plate; 12. Inner cavity;

[0033] 2. Door sill reinforcement beam; 20. Main beam body; 200. Cavity; 21. Buffer body; 211. Upper buffer body; 212. Side buffer body; 213. Lower buffer body; 22. Chamber;

[0034] 30. Pillar A; 31. Pillar B. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] In the description of the present invention, it should be stated that if there are terms indicating orientation or positional relationship such as "up, down, left, right, front, back, inside, outside", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Taking the vehicle described in the present invention as an example, the orientation words such as "up, down, left, right, front, back" used in the embodiments are defined based on the up and down direction (also known as the height direction), the left and right direction (also known as the width direction) and the front and back direction (also known as the length direction) of the vehicle. Specifically, as shown in the drawings, the X direction is the front and back direction of the vehicle, wherein the side to which the arrow points is "front", and the opposite is "back". The Y direction is the left and right direction of the vehicle, wherein the side to which the arrow points is "left", and the opposite is "right". The Z direction is the up and down direction of the vehicle, wherein the side to which the arrow points is "up", and the opposite is "down". “Inside” and “outside” are defined based on the contour of the corresponding components. For example, “inside” and “outside” are defined based on the contour of a vehicle, with the side of the vehicle contour close to the middle of the vehicle being “inside” and the opposite being the case being “outside”.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0039] Embodiment 1

[0040] This embodiment relates to a sill reinforcement beam, which can improve the structural performance and buffering effect of the sill beam 1; an exemplary structure thereof is as follows Figure 1 and Figure 2 shown.

[0041] In general, the threshold reinforcement beam includes a main beam body 20 and a buffer body 21 wrapped around the main beam body 20. The buffer body 21 adopts a multi-cavity structure, and the chambers 22 on the buffer body 21 are densely arranged in the length and height direction of the threshold reinforcement beam 2.

[0042] Specifically, the main beam body 20 of the present embodiment preferably adopts a hollow structure, and has a cavity 200 inside. The use of an internal hollow structure is conducive to reducing the deadweight of the main beam body 20, thereby improving the lightweight design level of the threshold reinforcement beam 2. Preferably, the cavity 200 of the main beam body 20 is directly formed by the outer wall of the main beam body 20 to form a single cavity 200. At the same time, it is preferred to control the outer wall thickness of the main beam body 20 to be between 1mm and 3mm. Setting the outer wall thickness of the main beam body 20 to 1mm to 3mm can effectively reduce the weight and consumables of the main beam body 20 on the basis of ensuring the reasonable structural strength of the main beam body 20; for example, the outer wall thickness of the main beam body 20 can be set to 1mm, 2mm or 3mm; preferably, it is set to 2mm.

[0043] It should be noted that the materials of the main beam 20 and the buffer body 21 can be flexibly selected, for example, they can be steel, aluminum or plastic materials. In this embodiment, the main beam 20 is made of continuous fiber reinforced composite material; the buffer body 21 is made of nylon material; both the main beam 20 and the buffer body 21 can be injection molded by an integrated molding process. The main beam 20 is made of continuous fiber reinforced composite material, with thermoplastic (nylon) or thermosetting (polyurethane) resin as the matrix and continuous fiber as the reinforcing material; the integrated injection molding process can generate a beam product with a single-cavity or multi-cavity structure, which has good structural performance and lightweight level.

[0044] The main beam body 20 and the buffer body 21 are made of composite nylon material, which is convenient for manufacturing any shaped structural parts through injection molding process, and then effectively bonding with the sheet metal parts of the threshold beam 1 through structural adhesive. The use of composite materials not only ensures the structural performance and buffering performance of the threshold reinforcement beam 2, but also has a high level of lightweight, which is about 40% lighter than the steel threshold reinforcement beam 2 and about 20% lighter than the aluminum threshold reinforcement beam 2.

[0045] like Figure 3 , Figure 4 and Figure 5As shown, the cross section of the main beam 20 of this embodiment is rectangular, and the buffer body 21 includes an upper buffer body 211 wrapped on the top of the main beam 20, a side buffer body 212 wrapped on one side of the main beam 20, and a lower buffer body 213 wrapped on the bottom of the main beam 20. The main beam 20 adopts a rectangular parallelepiped structure, which is convenient for the processing and forming of the main beam 20, and also convenient for the buffer body 21 to be wrapped and arranged outside the main beam 20; wherein, the lower buffer body 213 can be directly arranged on the bottom surface of the main beam 20, the upper buffer body 211 can be directly arranged on the top surface of the main beam 20, and the side buffer body 212 can be directly arranged on the side surface of the main beam 20; each buffer body 21 can be fixedly connected to the main beam 20 by bonding or welding. The buffer body 21 is arranged in a semi-enclosed form outside the main beam 20, which can not only effectively increase the cross-sectional size of the threshold reinforcement beam 2, but also well enhance the impact resistance and buffering of the threshold reinforcement beam 2 in the lateral direction.

[0046] Based on the above-mentioned setting, preferably, the cross-sectional shape of each buffer body 21 can be designed differently according to different positions. In the present embodiment, the projection of the upper buffer body 211 in the length direction of the sill reinforcement beam 2 is trapezoidal, that is, the surface of the upper buffer body 211 facing the outside of the vehicle (that is, the same side as the side of the side buffer body 212 facing away from the main beam body 20) is inclined inward from bottom to top. The projections of the side buffer body 212 and the lower buffer body 213 in the length direction of the sill reinforcement beam 2 are rectangular. With such a design, in the width direction of the sill reinforcement beam 2 (that is, the width direction of the vehicle), the load-bearing area of ​​the upper buffer body 211 gradually increases, and the buffering property will gradually increase during the impact process, so that the entire buffer body 21 has a better buffering effect.

[0047] In addition, based on the fact that the side buffer body 212 has a relatively large height dimension, it is preferred that at least two layers of chambers 22 are arranged vertically in the height direction of the side buffer body 212 .

[0048] like Figure 3 As shown, the buffer body 21 of this embodiment is constructed by crisscrossing plates, and each chamber 22 is surrounded by adjacent plates. At the same time, each chamber 22 is extended in the width direction of the door sill reinforcement beam 2.

[0049] In addition, preferably, each chamber 22 is open at least at one end. In this embodiment, each chamber 22 on the side buffer body 212 is open at one end, and each opening is arranged toward one side of the main beam body 20. Each chamber 22 on the upper buffer body 211 and the lower buffer body 213 is also open at one end, and the direction of each opening is opposite to the direction of the opening of each chamber 22 on the side buffer body 212. The one-end open setting facilitates the integral injection molding and demolding of the buffer body 21.

[0050] The buffer body 21 of this embodiment is composed of crisscross plates, so that adjacent plates can enclose various chambers 22 on the buffer body 21, which is also convenient for processing and forming the buffer body 21. In the case where the chamber 22 is divided and enclosed by the plates, the cross section of the chamber 22 is rectangular, and the chamber 22 itself is in the shape of a cuboid. The length direction of the chamber 22 is set to be consistent with the width direction of the threshold reinforcement beam 2, which can effectively improve the impact resistance of the buffer body 21 in the lateral direction of the threshold reinforcement beam 2, thereby further improving the structural performance and buffering effect of the threshold reinforcement beam 2.

[0051] The thickness of the plate of the buffer body 21 can be set reasonably. In this embodiment, the thickness of the plate is 1.5 mm to 3.5 mm. Controlling the thickness of the plate of the buffer body 21 between 1.5 mm and 3.5 mm can ensure the reasonable structural strength of the buffer body 21 and improve the lightweight effect of the buffer body 21. For example, the thickness of the buffer body 21 can be set to 1.5 mm, 2 mm, 2.5 mm or 3.5 mm; preferably, it is set to 2.5 mm.

[0052] To sum up, the threshold reinforcement beam of the present embodiment can form a good basic skeleton by setting the main beam body 20, thereby improving the structural strength of the threshold beam 1; a buffer body 21 with a multi-cavity structure is set outside the main beam body 20, which can effectively improve the structural performance and buffering performance of the threshold reinforcement beam 2, and the chambers 22 are densely arranged in the length and width directions of the threshold reinforcement beam 2. When the threshold reinforcement beam 2 is arranged in the inner cavity 12 of the threshold beam 1, the collision impact from the side of the vehicle can be effectively alleviated due to the collapse deformation of the chamber 22 on the buffer body 21, thereby helping to improve the structural performance and buffering effect of the threshold beam 1.

[0053] Moreover, in the solution of this embodiment, the profile structure of the continuous fiber reinforced composite material is designed along the entire length direction of the sill reinforcement beam 2, which can well cope with the small offset collision of the vehicle; the arrangement form and direction of each chamber 22 in the buffer body 21 can enhance the energy absorption effect of the buffer body 21 in the face of lateral collision. The sill reinforcement beam 2 is made of composite nylon material, which achieves the purpose of reducing weight by about 20% compared with the existing common aluminum alloy extrusions.

[0054] Embodiment 2

[0055] This embodiment relates to a vehicle, wherein the interior of the sill beam 1 of the vehicle is hollow and forms an inner cavity 12; and the sill reinforcement beam 2 provided in the first embodiment is arranged in the inner cavity 12. An exemplary structure of the sill beam 1 is as follows: Figure 6 , Figure 7 and Figure 8 shown.

[0056] like Figure 6As shown in the figure, the side frame of the present embodiment includes an A-pillar 30, a B-pillar 31, and a sill beam 1 connected between the bottoms of the A-pillar 30 and the B-pillar 31; the sill beam 1 is formed by a sill beam inner plate 10 located on the inner side and a side panel reinforcement plate 11 located on the outer side, thereby forming an inner cavity 12 of the sill beam 1 between the two.

[0057] Specifically, at least one side of the main beam 20 facing the outside of the vehicle should be covered with a buffer body 21; preferably, the buffer body 21 is bonded to the inner wall of the inner cavity 12 by epoxy resin structural adhesive, wherein the thickness of the adhesive layer is preferably controlled to be about 2 mm.

[0058] Based on the fact that the impact from the side of the vehicle will first act on the side reinforcement plate 11 on the outer side of the sill beam 1, the buffer body 21 is arranged on the side of the main beam body 20 facing the outside of the vehicle (i.e., the side facing the side reinforcement plate 11), and the buffer body 21 is directly bonded to the inner wall of the buffer body 21 (i.e., on the side reinforcement plate 11), which can effectively absorb the impact force on the side reinforcement plate 11, thereby better exerting the buffering performance of the sill reinforcement beam 2 and reducing the degree of deformation of the sill beam 1 due to the impact. For the side of the sill beam inner plate 10, the sill reinforcement beam 2 and the sill beam inner plate 10 can be directly abutted to improve the stability of the sill reinforcement beam 2 in the inner cavity 12 of the sill beam 1; of course, a certain buffer gap can also be retained between the sill reinforcement beam 2 and the sill beam inner plate 10 to increase the overall buffering performance of the sill beam 1.

[0059] The buffer body 21 made of nylon resin material is bonded to the side reinforcement plate 11 by structural adhesive, which can ensure the stability of the sill reinforcement beam 2. This structure can make the sill reinforcement beam 2 better participate in collision energy absorption and force transmission, thereby improving the safety of the side collision of the vehicle.

[0060] At the same time, the threshold beam 1 of this embodiment, its threshold reinforcement beam 2 is made of composite nylon material combined with structural adhesive, which has low cost and weight. Under the premise of ensuring the safety, rigidity, strength and other performance of the whole vehicle, the weight of the threshold reinforcement beam 2 can be effectively reduced, and the multiple clamps required for welding are reduced, thereby improving the processing technology of the entire threshold beam 1. The nylon and the sheet metal are combined by high-strength epoxy resin structural adhesive to form a stable structural cavity structure, which can significantly improve the bending resistance and energy absorption effect of the threshold reinforcement beam 2, thereby reducing the damage to the occupants when the vehicle is in a side collision.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A threshold reinforcement beam, Features: It comprises a main beam body (20), and a buffer body (21) covering the outside of the main beam body (20); The buffer body (21) adopts a multi-cavity structure, and the cavities (22) on the buffer body (21) are densely arranged in the length and height directions of the door sill reinforcement beam (2).

2. The sill reinforcement beam according to claim 1, Features: The main beam body (20) has a cavity (200) inside.

3. The sill reinforcement beam according to claim 1, Features: The cross section of the main beam body (20) is rectangular, and the buffer body (21) comprises an upper buffer body (211) covering the top of the main beam body (20), a side buffer body (212) covering one side of the main beam body (20), and a lower buffer body (213) covering the bottom of the main beam body (20).

4. The sill reinforcement beam according to claim 3, Features: The projection of the upper buffer body (211) in the length direction of the door sill reinforcement beam (2) is trapezoidal; and / or the projections of the side buffer body (212) and the lower buffer body (213) in the length direction of the door sill reinforcement beam (2) are rectangular; and / or the side buffer body (212) has at least two layers of chambers (22) arranged in upper and lower directions.

5. The rocker reinforcement beam according to claim 1, Features: The buffer body (21) is constructed by crisscrossing plates, and each chamber (22) is surrounded by adjacent plates.

6. The rocker reinforcement beam according to claim 5, Features: Each of the chambers (22) is arranged to extend in the width direction of the door sill reinforcement beam (2).

7. The sill reinforcement beam according to claim 6, Features: Each chamber (22) is open at least at one end.

8. The sill reinforcement beam according to any one of claims 1 to 7, Features: The main beam body (20) is made of continuous fiber reinforced composite material; and / or the buffer body (21) is integrally formed of nylon material.

9. A vehicle, Features: The vehicle's door sill beam (1) is hollow inside to form an inner cavity (12); The inner cavity (12) is provided with the sill reinforcement beam according to any one of claims 1 to 8.

10. The vehicle according to claim 9, Features: The buffer body (21) is coated on at least one side of the main beam body (20) facing the outside of the vehicle, and the buffer body (21) is bonded to the inner wall of the inner cavity (12) by epoxy resin structural adhesive.

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