Bumper beam assembly and vehicle

Abstract

Provided in the present application are a bumper beam assembly and a vehicle. The bumper beam assembly comprises a beam body and energy-absorbing boxes arranged on two sides of the beam body, wherein an energy-absorbing assembly is at least connected in each energy-absorbing box by means of crimping; a reinforcing structure connected to the beam body by means of die casting is provided on the surface of the beam body; the reinforcing structure comprises several first reinforcing ribs arranged obliquely and several second reinforcing ribs arranged in the opposite direction to the first reinforcing ribs; and the first reinforcing ribs and the second reinforcing ribs are staggered on the surface of the beam body, and the spacing between adjacent first reinforcing ribs or second reinforcing ribs increases in sequence along the middle of the beam body towards the two sides. By means of using a crimping process between the energy-absorbing assemblies and the energy-absorbing boxes, the present invention better facilitates crushing energy absorption; moreover, by means of the reinforcing structure arranged on the surface of the beam body, the connection strength of the beam body is improved, thereby avoiding the situation of failure in a collision condition or a trailer towing condition.

Description

A bumper beam assembly and a vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a bumper beam assembly and a vehicle. BACKGROUND

[0002] With the increasing demand of users for the safety of the vehicle body, the stiffness and strength of the vehicle body structure need to be continuously optimized, especially the ability of the front end of the vehicle to resist collision is higher, which greatly improves the safety of the vehicle in the event of a high-speed collision, such as the design of the bumper beam. However, with the current bumper beam design becoming heavier and heavier, the increasingly severe environmental and energy crisis, there is an urgent need to design a lightweight bumper beam, thereby providing technical support for achieving automobile energy saving and emission reduction. Based on this, the present application solves the design problem between the crushing energy absorption effect, crashworthiness, trailer towing performance and lightweight of the bumper beam.

[0003] The bumper beam of the prior art mainly has three commonly used materials; the first is a steel plate material, which is connected to form a bumper beam structure by means of tailor-welding; the second is an aluminum alloy material, which is connected to form a bumper beam structure by means of extrusion, folding (stretching) and welding; and the third is a composite material, which is connected to form a bumper beam structure by means of molding or injection molding. Among them, the steel plate, especially the hot-formed steel plate, has the advantages of high stiffness and strength, and the crashworthiness and trailer towing performance of the steel plate bumper beam can be easily guaranteed, but the obvious disadvantage is that the weight of the steel plate is too large, which does not meet the lightweight development trend when used on a car. The aluminum alloy has the advantages of certain stiffness, strength and low density, and the structure of the bumper beam body is formed by extrusion, which can optimize the stress and guarantee the crashworthiness and trailer towing performance of the bumper beam to a certain extent on light-duty and small vehicles. However, in the face of the increasing curb weight of large vehicles or electric vehicles, the structure design freedom is limited based on the aluminum alloy thickness extrusion scheme, and there are constraints in improving the crashworthiness and trailer towing performance of the bumper beam under the premise of guaranteeing lightweight; the composite material forming faces the problem of optimizing the design of stiffness and strength.

[0004] SUMMARY

[0005] The purpose of the present application is to provide a bumper beam assembly and a vehicle, which solves the design problem between the crushing energy absorption and lightweight of the existing bumper beam, and the specific scheme is as follows:

[0006] The application provides a bumper beam assembly, comprising: a beam body and energy absorption boxes arranged on both sides of the beam body; each of the energy absorption boxes is open at one end and at least one set of energy absorption components is connected to the inside of the energy absorption box through crimping; wherein the surface of the beam body is provided with a reinforcing structure connected with the beam body through die casting; the reinforcing structure comprises: a plurality of first reinforcing ribs arranged obliquely and a plurality of second reinforcing ribs arranged in the opposite direction of the first reinforcing ribs; the first reinforcing ribs and the second reinforcing ribs are arranged alternately on the surface of the beam body, wherein the spacing between adjacent first reinforcing ribs or second reinforcing ribs increases sequentially from the middle of the beam body to both sides.

[0007] Further, the wall thickness of the beam body is 1.6-2mm, and the thickness of the first reinforcing rib and the second reinforcing rib is 2-3 times the thickness of the beam body.

[0008] Further, each of the energy absorption components is an aluminum alloy extrusion structure, the energy absorption component comprises: a collapse box connected to the inside of the energy absorption box through crimping, and at least one set of longitudinal auxiliary reinforcing ribs is arranged around the side wall of the energy absorption box; wherein the longitudinal auxiliary reinforcing ribs are arranged in an asymmetric manner on opposite sides of the energy absorption box.

[0009] Each of the collapse boxes is provided with a bevel reinforcing part at the outer corner; the inside of the collapse box is divided into at least four collapse chambers by the staggered arrangement of horizontal plates and vertical plates; wherein the collapse chamber corresponding to the bevel reinforcing part is a triangular structure.

[0010] Further, the collapse box is in contact with the energy absorption box; wherein the crimping position of the collapse box around the energy absorption box corresponds to the position of the longitudinal auxiliary reinforcing rib arranged around the energy absorption box.

[0011] Further, the collapse box and the energy absorption box are gap-fitted; wherein at least two sets of support reinforcing plates are arranged in parallel at the position corresponding to each of the bevel reinforcing parts between the collapse box and the energy absorption box, and one of the sets of support reinforcing plates corresponding to each of the bevel reinforcing parts is connected to the energy absorption box through crimping; wherein the longitudinal auxiliary reinforcing ribs arranged on the energy absorption box are located between the corresponding two sets of support reinforcing plates.

[0012] Further, a plurality of transverse reinforcing ribs are arranged on one surface of the beam body from the upper end to the lower end; wherein the first reinforcing ribs and the second reinforcing ribs arranged alternately are arranged between the transverse reinforcing ribs and the beam body.

[0013] Further, at least two sets of L-shaped transverse reinforcing ribs are arranged on the outer surface of the side wall of each energy absorption box away from the reinforcing structure; the first side of the transverse reinforcing rib is fixed to the beam body, and the second side of the transverse reinforcing rib is fixed to the energy absorption box.

[0014] Further, a plurality of groups of rigidity reinforcing portions are arranged on the surfaces of the first and second reinforcing ribs radially along the beam body; the rear end of the rigidity reinforcing portion is arranged in the transverse reinforcing convex rib of the middle part of the beam body, and the upper and lower ends of the rigidity reinforcing portion are fixed to the transverse reinforcing convex ribs on the upper and lower sides of the beam body; and the rear end of each rigidity reinforcing portion is provided with an inner recessed lightening groove.

[0015] Further, the beam body is provided with a traction structure near the energy absorption box; the traction structure comprises a traction column arranged through the beam body, the traction column is connected to the beam body by pressure casting, a traction sleeve is arranged in the traction column by interference fit, a traction threaded hole is arranged in the middle part of the traction sleeve, and a plurality of triangular traction reinforcing ribs are arranged on the periphery of the two end parts of the traction column protruding from the beam body.

[0016] A vehicle comprising the bumper beam assembly.

[0017] Compared with the prior art, the bumper beam assembly and the vehicle have the following beneficial effects:

[0018] The bumper beam assembly and the vehicle provided by the application can crush the energy absorption assembly arranged in the energy absorption box on both sides of the beam body along the axial direction of the energy absorption box when a collision occurs, and the overall strength of the beam body is increased by the design of the reinforcing structure arranged on the surface of the beam body, so that the cracking or tensile failure of the beam body is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a schematic view of the overall structure of the bumper beam assembly;

[0020] Fig. 2 is a schematic view of the back structure of the bumper beam assembly;

[0021] Fig. 3 is a schematic view of the structure of another embodiment of the bumper beam assembly;

[0022] Fig. 4 is a schematic view of the overall structure of the bumper beam assembly without the reinforcing structure;

[0023] Fig. 5 is a schematic view of the connection structure of the beam body and the energy absorption box;

[0024] Fig. 6 is a schematic view of the connection structure of the reinforcing structure on the beam body;

[0025] Fig. 7 is a schematic view of the structure of the bumper beam assembly without the energy absorption assembly;

[0026] Fig. 8 is a schematic view of the structure of the energy absorption assembly in one embodiment.

[0027] Fig. 1: 1, beam body; 2, energy absorption box; 21, longitudinal auxiliary reinforcing rib; 3, reinforcing structure; 31, first reinforcing rib; 32, second reinforcing rib; 4, reinforcing rib; 5, transverse reinforcing rib; 6, stiffness reinforcing part; 7, energy absorption assembly; 71, energy absorption box; 72, inclined surface reinforcing part; 73, energy absorption cavity; 74, support reinforcing plate; 8, traction structure; 81, traction column; 82, traction sleeve; 83, traction threaded hole; 84, traction reinforcing rib; 85, guide key; 86, guide groove. DETAILED DESCRIPTION

[0028] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to Figs. 1-8. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0029] It should be understood that, although the terms first, second, third, etc. can be used in embodiments of the present application to describe, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first can also be called the second, and similarly, the second can also be called the first.

[0030] Embodiment 1

[0031] As shown in Figs. 1, 6 and 7, the present application provides a bumper beam assembly, which comprises a beam body 1 and energy absorption boxes 2 arranged on both sides of the beam body 1; the beam body 1 and the energy absorption boxes 2 are connected by die casting;

[0032] Each of the energy absorption boxes 2 is open at one end and at least has a group of energy absorption assemblies 7 connected by pressure bonding inside; wherein the surface of the beam body 1 is arranged with reinforcing structures 3 connected by die casting with the beam body 1;

[0033] The two sides of the reinforcing structures 3 extend to the inside of the energy absorption boxes 2; the reinforcing structures 3 comprise a plurality of first reinforcing ribs 31 arranged obliquely and a plurality of second reinforcing ribs 32 arranged in a direction opposite to the first reinforcing ribs 31; the first reinforcing ribs 31 and the second reinforcing ribs 32 are arranged alternately on the surface of the beam body 1, wherein the spacing between adjacent first reinforcing ribs 31 or second reinforcing ribs 32 increases successively along the middle part of the beam body 1 towards both sides.

[0034] Specifically, the first reinforcing ribs 31 and the second reinforcing ribs 32 are arranged obliquely on the surface of the beam body 1 at an angle of 30-45 degrees, and in the present embodiment, the angle is preferably 45 degrees.

[0035] Optionally, the wall thickness of the beam body 1 and the energy absorption box 2 is 1.8 mm, and the thickness of the first and second reinforcing ribs 31 and 32 is 2-3 times the thickness of the beam body 1. In this embodiment, the thickness of the first and second reinforcing ribs 31 and 32 is 5 mm.

[0036] Optionally, each energy absorption assembly 7 is an aluminum alloy extruded structure, which comprises an energy collapse box 71 connected to the inside of the energy absorption box 2 by crimping, and a set of longitudinal auxiliary reinforcing ribs 21 arranged around the side wall of the energy absorption box 2; wherein the longitudinal auxiliary reinforcing ribs 21 are arranged in an asymmetric manner on opposite sides of the energy absorption box 2; the advantage of this design is that by arranging the longitudinal auxiliary reinforcing ribs 21 in an asymmetric manner on opposite sides of the energy absorption box 2, the overall strength of the energy absorption box 2 is avoided to be too large due to symmetric design, which affects the energy absorption of the crumple, and at the same time, the energy absorption box 2 is also avoided to be broken and failed due to too thin material thickness under the working condition of towing trailer.

[0037] Each energy collapse box 71 is provided with a beveled reinforcing portion 72 at the outer corner; the inside of the energy collapse box 71 is divided into six energy collapse chambers 73 by staggered arrangement of horizontal plates and vertical plates, preferably, four energy collapse chambers 73 are arranged inside the energy collapse box 71, and are arranged in a cross shape; the advantage of this design is that it can effectively absorb energy and avoid instability.

[0038] Optionally, the energy collapse chamber 73 corresponding to the beveled reinforcing portion 72 is triangular in structure.

[0039] Optionally, as shown in FIG. 8, the energy collapse box 71 is in contact with the energy absorption box 2; wherein the crimping position of the energy collapse box 71 and the energy absorption box 2 corresponds to the position of the longitudinal auxiliary reinforcing rib 21 arranged around the energy absorption box 2; it can be understood that the crimping position of the energy collapse box 71 and the energy absorption box 2 is arranged at the longitudinal auxiliary reinforcing rib 21, that is, the connection stability and strength of the energy collapse box 71 and the energy absorption box 2 are ensured by the longitudinal auxiliary reinforcing rib 21.

[0040] As shown in FIG. 1; the energy collapse box 71 and the energy absorption box 2 are gap-fitted; wherein at least two sets of support reinforcing plates 74 are arranged in parallel corresponding to each beveled reinforcing portion 72 between the energy collapse box 71 and the energy absorption box 2, and one of the support reinforcing plates 74 corresponding to each beveled reinforcing portion 72 is connected to the energy absorption box 2 by crimping, wherein the longitudinal auxiliary reinforcing ribs 21 arranged on the energy absorption box 2 are located between the corresponding two sets of support reinforcing plates 74; the support reinforcing plates 74 play a reinforcing role on the energy absorption box 2 and have effective energy absorption effect in collision.

[0041] It needs to be explained that the basic thickness of the existing die casting process forming is generally 2.0-4.0mm, and the mechanical properties of the die casting body decrease after the thickness increases, and the weight increases, the strength improves, and the disadvantage is not conducive to lightweight; if the thickness is thinned, the overall strength of the product is weakened and the crushing failure occurs; first, in the embodiment, the thickness of the energy absorption box 2 and the beam body 1 is 1.8mm, which solves the problem of excessive weight of the bumper beam assembly, in order to overcome the problem of too thin thickness, which leads to the weakening of the overall strength of the energy absorption box 2 and the beam body 1 and the crushing or towing failure, when a collision occurs, the reinforcing structure 3 arranged on the surface of the beam body 1 and the longitudinal auxiliary reinforcing ribs 21 arranged around the energy absorption box 2 are arranged, which increases the overall strength of the beam body 1 and the energy absorption box 2 on the basis of meeting the lightweight design, that is, it can avoid the situation that the beam body 1 and the energy absorption box 2 are too low in strength and break down, and it can also avoid the situation that the strength is too large and affects the crushing energy absorption effect; at the same time, the energy absorption box 2 and the energy absorption assembly 7 adopt a crimping connection mode, which plays a role in fixing and crushing energy absorption of the energy absorption assembly 7, and facilitates uniform crushing of the energy absorption assembly 7 along the axial direction of the energy absorption box 2 to absorb collision energy. Compared with the welding or screwing process used in the prior art, the connection strength of the prior art is high, which is not conducive to crushing, and the cost is also relatively high.

[0042] In another embodiment, as shown in Figure 3; the inside of the energy absorption box 2 is arranged with four energy absorption assemblies 7, and each energy absorption assembly 7 is a crushing energy box 71; the advantage of this design is that compared with the prior art, the collision energy absorption effect of the energy absorption box 2 and the energy absorption assembly 7 is obviously improved when a collision occurs.

[0043] It needs to be further explained that through the design of the reinforcing structure 3, when the energy absorption assembly 7 and the energy absorption box 2 are crimped, the reinforcing structure 3 arranged on the surface of the beam body 1 will not fail, and at the same time, the energy absorption assembly 7 is crushed for energy absorption; wherein the design of the reinforcing structure 3 increases the overall connection strength of the beam body 1, preventing the beam body 1 from cracking when colliding.

[0044] It needs to be further explained that the die casting process is used to form the beam body 1 and the energy absorption box 2 and the reinforcing structure 3 at one time, thereby improving the overall stability, stiffness and strength of the connection between the beam body 1 and the energy absorption box 2 and the reinforcing structure 3.

[0045] Optionally, the beam body 1, the energy absorption box 2, the first reinforcing rib 31 and the second reinforcing rib 32 are all made of aluminum alloy or magnesium alloy.

[0046] Optionally, as shown in Figure 4, the surface of the cross beam body 1 is sequentially and spacedly provided with five transverse reinforcing ribs 4 from the upper end to the lower end; wherein the first reinforcing rib 31 and the second reinforcing rib 32 arranged alternately are arranged between the transverse reinforcing rib 4 and the cross beam body 1; in particular, in this example, the overall strength of the cross beam body 1 is improved by the design of the five transverse reinforcing ribs 4.

[0047] In another embodiment, as shown in Figure 5, the surface of the cross beam body 1 is sequentially and spacedly provided with three transverse reinforcing ribs 4 from the upper end to the lower end; the benefit of this design is that the material of the cross beam body 1 is further lightened; the disadvantage is that the strength of the cross beam body 1 is slightly insufficient compared to the cross beam body 1 in the previous embodiment.

[0048] Optionally, the outer surface of each energy absorption box 2 away from the reinforcing structure 3 is spacedly provided with two groups of L-shaped transverse reinforcing ribs 5; the first side of the transverse reinforcing rib 5 is fixedly connected with the cross beam body 1, and the second side of the transverse reinforcing rib 5 is fixedly connected with the energy absorption box 2; the first side and the second side are perpendicular to each other; the advantage of this design is that it ensures that the transverse reinforcing rib 5 has sufficient force transmission performance during the collision, and secondly, the overall weight of the product is further reduced by the structural design of the transverse reinforcing rib 5, and furthermore, the design of the transverse reinforcing rib 5 can avoid crack propagation to the whole cross beam body 1 in the later stage of the collision, thereby ensuring the integrity of the cross beam body 1.

[0049] Optionally, the surface of the first reinforcing rib 31 and the second reinforcing rib 32 is spacedly provided with several groups of rigidity reinforcing portions 6 along the radial direction of the cross beam body 1; wherein the rear end of the rigidity reinforcing portion 6 is provided with a transverse reinforcing rib 4 in the middle part of the cross beam body 1, and the upper and lower ends of the rigidity reinforcing portion 6 are fixed to the transverse reinforcing ribs 4 on the upper and lower sides of the cross beam body 1; the rear end of each rigidity reinforcing portion 6 is provided with an inner concave lightening groove; the advantage of this design is that the overall mass of the bumper cross beam assembly is further reduced.

[0050] In particular, the rigidity reinforcing portion 6 in this embodiment is in a crescent structure or a U-shaped structure, which aims to achieve the lightweight design requirement of the product.

[0051] Optionally, as shown in Figure 2, the part of the cross beam body 1 close to the energy absorption box 2 is provided with a traction structure 8; the traction structure 8 comprises a traction column 81 arranged through the cross beam body 1, the traction column 81 is connected with the cross beam body 1 by pressure casting, the traction column 81 is provided with a traction sleeve 82 by interference fit inside, the traction sleeve 82 is provided with a traction threaded hole 83 in the middle part, the two end parts of the traction column 81 protruding out of the cross beam body 1 are fixedly provided with several triangular traction reinforcing ribs 84 around the side, and the traction column 81 is provided with an annular reinforcing rib around the side, wherein the annular reinforcing rib is arranged through the traction reinforcing rib 84.

[0052] Optionally, the outer side of the traction sleeve 82 is further provided with a guide key 85, and the inner side of the traction column 81 is provided with a guide groove 86 matched with the guide key 85; it can be understood that through the cooperation of the guide key 85 and the guide groove 86, the deflection of the traction sleeve 82 during the operation of the traction sleeve 82 and the traction hook of other vehicles is prevented, and secondly, the installation and fixation of the traction sleeve 82 and the traction column 81 are facilitated.

[0053] Specifically, in the embodiment, the traction structure 8 and the beam body 1 are connected in a die casting process connection mode, which meets the lightweight design, and through the design of the reinforcing structure 3, the connection strength of the traction structure 8 and the beam body 1 is ensured, secondly, the traction column 81 of the present application can not be limited to the design of the existing technology which cannot be protruded from the beam body 1, and can be arranged at the front end or the rear end of the beam body 1, and the layout can be designed according to product requirements, which improves the convenience of the product as a whole.

[0054] The die casting process in the prior art determines that the elongation rate of the energy absorption box 2 is not as good as that of the aluminum alloy material extrusion forming process, that is, the performance form of the die casting process is hard and brittle; in the process of collision, the crushing energy absorption effect is not good, and the design of the energy absorption box 2 often appears functional failure, and the common failure mode is fragmentation instead of crushing energy absorption, which leads to very limited and unstable energy absorption, which belongs to the technical bias in the industry, and currently the research on die casting materials and die casting process is being carried out in China, the purpose is to improve the elongation rate and fundamentally solve this problem; in the present application, the technical bias in the industry is broken, the die casting process is adopted, and the lightweight design is met, the energy absorption assembly 7 is installed in the energy absorption box 2 in a crimping manner, and the overall connection strength of the energy absorption box 2 is increased by using the longitudinal auxiliary reinforcing ribs 21 arranged on the side of the energy absorption box 2, so as to avoid the crushing failure of the energy absorption box 2; secondly, the reinforcing structure 3 arranged on the surface of the beam body 1 is used to increase the overall strength of the beam body 1, so as to avoid the crushing failure of the beam body 1; it can be understood that when a collision occurs, the reinforcing structure 3 improves the overall strength of the beam body 1, which can prevent the beam body 1 from cracking due to too thin wall thickness, and can meet the use strength requirement of the traction structure 8, and then the energy absorption box 2 and the energy absorption assembly 7 are deformed to absorb energy in a collision; compared with the prior art, the crushing energy absorption effect is obviously improved on the basis of meeting the lightweight design, and secondly, the die casting process between the beam body 1 and the energy absorption box 2 in the present application simplifies the process steps and significantly improves the efficiency.

[0055] In a second aspect, the present application provides a vehicle comprising the bumper beam assembly.

[0056] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

Claims

1. A bumper crossbeam assembly, comprising: The beam body (1) and energy-absorbing boxes (2) disposed on both sides of the beam body (1) are characterized in that each energy-absorbing box (2) is press-fitted with at least one set of energy-absorbing components (7); wherein, the surface of the beam body (1) is provided with a reinforcing structure (3) die-cast and connected to the beam body (1); the reinforcing structure (3) includes: a plurality of inclined first reinforcing ribs (31) and a plurality of second reinforcing ribs (32) arranged in the opposite direction to the arrangement of the first reinforcing ribs (31); the first reinforcing ribs (31) and the second reinforcing ribs (32) are arranged alternately on the surface of the beam body (1), wherein the spacing between adjacent first reinforcing ribs (31) or second reinforcing ribs (32) increases sequentially from the middle of the beam body (1) toward both sides.

2. The bumper beam assembly according to claim 1, characterized in that, The wall thickness of the crossbeam body (1) and the energy-absorbing box (2) is 1.6-2mm. Correspondingly, the thickness of the first reinforcing rib (31) and the second reinforcing rib (32) is 2-3 times the thickness of the crossbeam body (1).

3. The bumper beam assembly according to claim 2, characterized in that, Each of the energy-absorbing components (7) is an extruded aluminum alloy structure; the energy-absorbing component (7) includes: an energy-absorbing box (71) press-fitted into the inside of the energy-absorbing box (2), and at least one set of longitudinal auxiliary reinforcing ribs (21) is provided around the side wall of the energy-absorbing box (2); wherein the longitudinal auxiliary reinforcing ribs (21) are arranged asymmetrically on opposite sides of the energy-absorbing box (2); Each energy-breaking box (71) is provided with a sloping reinforcement (72) at its outer corner; the interior of the energy-breaking box (71) is divided into at least four energy-breaking sections by staggered horizontal and vertical plates. The cavity (73) is a triangular structure, which corresponds to the inclined reinforcing part (72).

4. The bumper beam assembly according to claim 3, characterized in that, The energy-breaking box (71) is in contact with the energy-absorbing box (2); wherein, the pressing point of the energy-breaking box (71) around the energy-absorbing box (2) corresponds to the position of the longitudinal auxiliary reinforcing ribs (21) arranged around the energy-absorbing box (2).

5. The bumper beam assembly according to claim 3, characterized in that, The energy-draining box (71) and the energy-absorbing box (2) are fitted with a clearance. At least two sets of supporting reinforcing plates (74) are arranged in parallel between the energy-draining box (71) and the energy-absorbing box (2) at each of the inclined reinforcing parts (72). One set of supporting reinforcing plates (74) corresponding to each of the inclined reinforcing parts (72) is connected to the energy-absorbing box (2) by a pressing method. The longitudinal auxiliary reinforcing ribs (21) arranged on the energy-absorbing box (2) are located between the corresponding two sets of supporting reinforcing plates (74).

6. The bumper beam assembly according to claim 2, characterized in that, The beam body (1) has a number of transverse reinforcing ribs (4) arranged sequentially from the top to the bottom on one surface; wherein the first reinforcing rib (31) and the second reinforcing rib (32) arranged in an alternating manner are arranged between the transverse reinforcing ribs (4) and the beam body (1).

7. The bumper beam assembly according to claim 6, characterized in that, Each energy-absorbing box (2) has at least two sets of L-shaped transverse reinforcing ribs (5) arranged at intervals on the outer surface of the side wall away from the reinforcing structure (3); the first side of the transverse reinforcing rib (5) is fixedly connected to the beam body (1), and the second side of the transverse reinforcing rib (5) is fixedly connected to the energy-absorbing box (2).

8. The bumper beam assembly according to claim 7, characterized in that, The first reinforcing rib (31) and the second reinforcing rib (32) are provided with several sets of stiffness reinforcing parts (6) arranged radially along the beam body (1); wherein, the rear end of the stiffness reinforcing part (6) passes through the transverse reinforcing rib (4) in the middle of the beam body (1), and the upper and lower ends of the stiffness reinforcing part (6) are fixed to the transverse reinforcing rib (4) on the upper and lower sides of the beam body (1); each stiffness reinforcing part (6) is provided with a concave weight reduction groove at its rear end.

9. The bumper beam assembly according to claim 8, characterized in that, A traction structure (8) is provided at the part of the crossbeam body (1) near the energy absorption box (2); the traction structure (8) includes: a traction column (81) arranged through the crossbeam body (1), the traction column (81) and the crossbeam body (1) are die-cast connected; a traction sleeve (82) is provided inside the traction column (81) with an interference fit; a traction threaded hole (83) is provided in the middle of the traction sleeve (82); a number of triangular traction reinforcing ribs (84) are arranged around the two ends of the traction column (81) protruding from the crossbeam body (1).

10. A vehicle, characterized in that, Includes the bumper beam assembly as described in any one of claims 1-9.

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