Cross beam, cross beam assembly, vehicle floor assembly and vehicle

Abstract

The invention belongs to the technical field of vehicles, and discloses a cross beam, a cross beam assembly, a vehicle floor assembly and a vehicle. The cross beam comprises a cross beam body, the cross beam body is of an integrated structure, and the cross section of the cross beam body forms at least three closed buffer cavities which are sequentially distributed in the directional direction. The cross beam is simple in structure, high in production efficiency and low in production cost; and secondly, the cross beam is good in structural strength, bending resistance, deformation resistance and bearing capacity, and the risk that the vehicle body is crushed can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a cross beam, a cross beam assembly, a vehicle floor assembly and a vehicle. Background Art

[0002] Under the transformation of the vehicle industry towards electrification and low-carbon emission reduction, component integration has increasingly become a development trend of lightweight vehicle bodies. Among them, the cross beam is an important component structure of the vehicle body. It is fixed on the front floor of the vehicle and used to install the front row seats. When the vehicle is subjected to a frontal impact and / or a side impact, the cross beam is used to bear the load of the frontal impact and / or the load of the side impact to ensure the safety of passengers. Therefore, the bending resistance, anti-deformation ability and bearing capacity of the cross beam become particularly important.

[0003] Currently, in the prior art, the cross-sectional shape of the cross beam body of the cross beam is usually designed as an "n" shape or a "day" shape, etc. Among them, for the cross beam body with an "n" - shaped cross-sectional shape, due to the lack of a support structure in the middle area of the cross-sectional shape, there are still potential hazards such as poor bending resistance, anti-deformation ability and bearing capacity in the cross beam body with an "n" - shaped cross-sectional shape. For the cross beam body with a "day" - shaped cross-sectional shape, compared with the cross beam body with an "n" - shaped cross-sectional shape, the bending resistance, anti-deformation ability and bearing capacity are improved. However, in order to improve the use safety of the vehicle, a strengthening structure is usually attached to the basis of the cross beam body; or, the thickness of the local or even the whole plate of the cross beam body is increased to improve the overall bending resistance, anti-deformation ability and bearing capacity of the cross beam. However, this results in a large number of components, a complex structure, a heavy weight of the cross beam, and there is still room for improvement in the performance such as the bending resistance, anti-deformation ability and bearing capacity of the cross beam body. Summary of the Invention

[0004] The purpose of the present invention is to provide a cross beam, a cross beam assembly, a vehicle floor assembly and a vehicle to solve the above problems existing in the cross beam in the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A cross beam, including a cross beam body, the cross beam body is an integrated structure, and the cross section of the cross beam body forms at least three closed buffer cavities distributed in sequence along a direction.

[0007] As a preferred solution of the above cross beam, the cross beam body includes a first cross beam portion, a second cross beam portion and a third cross beam portion connected in sequence;

[0008] The starting end of the first crossbeam is fixedly connected to the end of the first crossbeam to form a first buffer cavity; the second crossbeam is located on one side of the first crossbeam along the orientation and forms a second buffer cavity distributed on one side of the first buffer cavity with the first crossbeam; the third crossbeam is located on the other side of the first crossbeam along the orientation and forms a third buffer cavity distributed on the other side of the first buffer cavity with the first crossbeam.

[0009] As a preferred embodiment of the above-mentioned crossbeam, the end of the second crossbeam portion and the beginning of the third crossbeam portion are both fixedly connected to the first top of the first crossbeam portion; a second buffer cavity is formed between the first top, the first side portion of the first crossbeam portion along the orientation, and the second crossbeam portion;

[0010] The end of the third crossbeam is fixedly connected to the second side of the first crossbeam along the orientation, and the third buffer cavity is formed between the first top, the third crossbeam and the second side.

[0011] As a preferred embodiment of the aforementioned crossbeam, the first buffer cavity is a trapezoidal buffer cavity.

[0012] As a preferred embodiment of the above-mentioned crossbeam, the end of the second crossbeam and the beginning of the third crossbeam are both laser-welded to the first top;

[0013] The welding width is greater than or equal to 4 mm in the direction extending from the end of the second crossbeam to the beginning of the third crossbeam.

[0014] As a preferred embodiment of the aforementioned crossbeam, the end of the third crossbeam is laser-welded to the second side; the welding width along the extending direction of the second side is greater than or equal to 4 mm.

[0015] As a preferred embodiment of the aforementioned crossbeam, the first top, the bends on the first side, the bends on the second side, the bends on the second crossbeam, and the bends on the third crossbeam are all formed with rounded corners.

[0016] The ratio of the radius of the rounded corner structure to the thickness of the beam body is greater than or equal to 4.

[0017] As a preferred embodiment of the aforementioned crossbeam, the first buffer cavity and the second buffer cavity are combined to form a first combined buffer area, which is a trapezoidal buffer area.

[0018] As a preferred embodiment of the aforementioned crossbeam, the first buffer cavity and the third buffer cavity are combined to form a second combined buffer region, which is a trapezoidal buffer region.

[0019] As a preferred embodiment of the aforementioned crossbeam, the first crossbeam portion includes a first top, a first side, a second side, a first bottom, and a second bottom, wherein the first bottom, the first side, the first top, the second side, the second bottom, the second crossbeam portion, and the third crossbeam portion are connected in sequence, and the ends of the first bottom and the second bottom are fixedly connected.

[0020] As a preferred embodiment of the aforementioned crossbeam, along the orientation, the weld width of the laser weld between the first bottom and the second bottom is greater than or equal to 4 mm; or, the weld width of the spot weld between the first bottom and the second bottom is greater than or equal to 9 mm.

[0021] As a preferred embodiment of the aforementioned crossbeam, the crossbeam further includes a reinforcing support member fixedly connected to the crossbeam body, the reinforcing support member being used to enhance the structural strength of the crossbeam body.

[0022] As a preferred embodiment of the aforementioned crossbeam, the reinforcing support is located on the side of the second buffer cavity away from the first buffer cavity.

[0023] As a preferred embodiment of the aforementioned crossbeam, the reinforcing support includes a first reinforcing part and a second reinforcing part connected to each other. The first reinforcing part is fixedly connected to the top of the second crossbeam, and the second reinforcing part is fixedly connected to the side of the second crossbeam.

[0024] The crossbeam assembly includes two crossbeam side plates and the aforementioned crossbeam. The two ends of the crossbeam body along its length are respectively fixedly connected to the two crossbeam side plates one-to-one.

[0025] The vehicle floor assembly includes a floor body and the aforementioned crossbeam assembly, wherein the crossbeam body and the two crossbeam side plates are fixedly connected to the floor body.

[0026] As a preferred embodiment of the aforementioned vehicle floor assembly, the length direction of the crossbeam body is parallel to the width direction of the vehicle, and the vehicle floor assembly further includes a battery frame, with the rear bottom of the crossbeam body fixedly connected to the battery frame along the length direction of the vehicle.

[0027] Vehicles, including the aforementioned vehicle floor assembly.

[0028] The beneficial effects of this invention are:

[0029] This invention provides a crossbeam, a crossbeam assembly, a vehicle floor assembly, and a vehicle. The crossbeam includes a crossbeam body, which is an integral structure, and the cross-section of the crossbeam body forms at least three closed buffer cavities distributed sequentially along a direction.

[0030] The crossbeam body is an integrated structure, which is simpler than the crossbeam body assembled from multiple parts in the existing technology. The number of parts is only one, which can effectively improve production efficiency and reduce production costs.

[0031] Secondly, the beam body is an integrated structure, which can effectively improve the structural strength of the beam body.

[0032] Secondly, the cross-section of the crossbeam body forms multiple sequentially distributed closed buffer cavities. It can be understood that the crossbeam body forms multiple first support beams along the length of the vehicle, with a closed buffer cavity corresponding to any two adjacent first support beams. Each first support beam extends approximately along the height of the vehicle. These multiple first support beams support the top of the crossbeam body along the height of the vehicle. Furthermore, two second support beams are formed between any two adjacent first support beams, spaced apart along the height of the vehicle. Each second support beam is supported between its corresponding two counterparts along the length of the vehicle. The combination of multiple first and second support beams effectively enhances the crossbeam body's ability to disperse impact force, particularly in frontal collisions, thereby improving its bending resistance and reducing the risk of vehicle body crushing. Especially in side collisions, the multiple first and second support beams increase the load-bearing area of ​​the crossbeam body, effectively improving its deformation resistance and further reducing the risk of vehicle body crushing. In particular, along the height of the vehicle, multiple first support beams can effectively enhance the load-bearing capacity of the crossbeam body, thereby further reducing the risk of the vehicle body being crushed.

[0033] Therefore, the crossbeam has a simple structure, high production efficiency and low production cost; secondly, the crossbeam has good structural strength, good bending resistance, good deformation resistance and good load-bearing capacity, which can effectively reduce the risk of the vehicle body being crushed. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the crossbeam structure provided in a specific embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of a crossbeam provided in another embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of a crossbeam provided in another embodiment of the present invention;

[0037] Figure 4 This is an exploded view of the beam body provided in a specific embodiment of the present invention;

[0038] Figure 5This is an exploded view of the first crossbeam portion of the crossbeam body provided in a specific embodiment of the present invention;

[0039] Figure 6 yes Figure 2 The provided exploded view of the beam;

[0040] Figure 7 This is a cross-sectional view of the beam provided in a specific embodiment of the present invention;

[0041] Figure 8 This is a structural schematic diagram of the beam assembly provided in a specific embodiment of the present invention from a first perspective;

[0042] Figure 9 This is a structural schematic diagram of the beam assembly provided in a specific embodiment of the present invention from a second perspective;

[0043] Figure 10 This is a structural schematic diagram of a vehicle floor assembly provided in a specific embodiment of the present invention;

[0044] Figure 11 This is a cross-sectional view of the seat bracket assembled on the crossbeam body according to a specific embodiment of the present invention.

[0045] In the picture:

[0046] 100. Crossbeam; 200. Crossbeam assembly; 300. Vehicle floor assembly;

[0047] 1. The main body of the crossbeam;

[0048] 11. First crossbeam section; 111. First top section; 112. First side section; 113. Second side section; 114. First bottom section; 115. Second bottom section;

[0049] 12. Second crossbeam section; 121. Third bottom section; 122. Third side section; 1221. Second through hole; 123. Second top section; 1231. First through hole; 1232. Fifth through hole; 1233. Seventh through hole;

[0050] 13. Third crossbeam section; 131. Third top section; 1311. Third through hole; 132. Fourth side section; 133. Fourth bottom section; 1331. Fourth through hole; 134. Fifth side section;

[0051] 141. First buffer chamber; 142. Second buffer chamber; 143. Third buffer chamber;

[0052] 2. Reinforcing support component; 21. First reinforcing part; 22. Second reinforcing part;

[0053] 3. Side plate of the crossbeam; 31. First connecting part; 32. Second connecting part; 33. Third connecting part;

[0054] 4. Flooring itself;

[0055] 5. Seat bracket; 51. Fourth connecting part; 52. Fifth connecting part. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0057] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0060] In the current prior art, the cross-sectional shape of the crossbeam body of the crossbeam is usually designed as an "n" shape or a "day" shape, etc. Among them, for the crossbeam body with an "n" - shaped cross - sectional shape, since there is no support structure in the middle area of the cross - sectional shape, there are still potential risks such as poor bending strength, anti - deformation ability, and bearing capacity in the crossbeam body with an "n" - shaped cross - sectional shape. For the crossbeam body with a "day" - shaped cross - sectional shape, compared with the crossbeam body with an "n" - shaped cross - sectional shape, the bending strength, anti - deformation ability, and bearing capacity are improved. However, in order to improve the use safety of the vehicle, a strengthening structure is usually attached to the crossbeam body; or, the local or even the overall plate thickness of the crossbeam body is thickened to improve the overall bending strength, anti - deformation ability, and bearing capacity of the crossbeam. But this results in a large number of components, a complex structure, a heavy weight of the crossbeam, and there is still room for improvement in the performance such as the bending strength, anti - deformation ability, and bearing capacity of the crossbeam body.

[0061] As Figures 1-3 shown, the present invention provides a crossbeam 100. The crossbeam 100 includes a crossbeam body 1. The crossbeam body 1 is an integrated structure, and the cross - section of the crossbeam body 1 forms at least three closed buffer cavities distributed in sequence along a direction.

[0062] The crossbeam body 1 of the crossbeam 100 is an integrated structure. Compared with the crossbeam body 1 formed by assembling multiple parts in the prior art, the structure is simple, and the number of parts is only one, thus effectively improving production efficiency and reducing production costs.

[0063] Secondly, the crossbeam body 1 being an integrated structure can effectively improve the structural strength of the crossbeam body 1.

[0064] Secondly, the cross-section of the crossbeam body 1 forms multiple sequentially distributed closed buffer cavities. It can be understood that the crossbeam body forms multiple first support beams along the length of the vehicle, with a closed buffer cavity corresponding to any two adjacent first support beams. Each first support beam extends approximately along the height of the vehicle. The multiple first support beams support the top of the crossbeam body along the height of the vehicle. Furthermore, two second support beams are formed between any two adjacent first support beams, spaced apart along the height of the vehicle. Each second support beam is supported between the corresponding two second support beams along the length of the vehicle. The combination of the multiple first and second support beams effectively enhances the impact force dispersion effect of the crossbeam body 1, especially under frontal collision conditions, thereby improving its bending resistance and reducing the risk of the vehicle body being crushed. Especially when the crossbeam body 1 is in a side impact condition, the multiple first support beams and multiple second support beams can increase the load-bearing area of ​​the crossbeam body 1, effectively improving its deformation resistance and thus further reducing the risk of the vehicle body being crushed. In particular, along the height direction of the vehicle, the multiple first support beams can also effectively improve the load-bearing capacity of the crossbeam body 1, thereby further reducing the risk of the vehicle body being crushed.

[0065] Therefore, the crossbeam 100 has a simple structure, high production efficiency and low production cost; secondly, the crossbeam 100 has good structural strength, good bending resistance, good deformation resistance and good load-bearing capacity, which can effectively reduce the risk of the vehicle body being crushed.

[0066] in, Figure 1 This is the first type of beam body 1 formed. Figure 2 This is the second type of beam body 1. Figure 3 This forms the third type of beam body 1.

[0067] Understandably, the orientation is parallel to the length direction of the vehicle.

[0068] Preferably, in this embodiment, the crossbeam body 1 is an integrated structure formed by edge roll forming and welding of sheet metal. This further improves the production efficiency of the crossbeam body 1.

[0069] Preferably, in this embodiment, such as Figures 1-3As shown, the cross-section of the crossbeam body 1 forms three closed buffer cavities distributed sequentially along the orientation. It can be understood that the crossbeam body forms four first support beams along the length of the vehicle. All four first support beams support the top of the crossbeam body along the height of the vehicle. Between any two adjacent first support beams, two second support beams are formed, spaced apart along the height of the vehicle. Each second support beam is supported between two corresponding second support beams along the length of the vehicle. Compared to forming two closed buffer cavities, this effectively improves the structural strength, bending resistance, deformation resistance, and load-bearing capacity of the crossbeam body 1. Compared to forming four, five, or six closed buffer cavities, this design achieves better weight reduction of the crossbeam body 1 while maintaining structural strength, bending resistance, deformation resistance, and load-bearing capacity.

[0070] Optionally, such as Figure 1 and Figure 2 As shown, the crossbeam body 1 includes a first crossbeam portion 11, a second crossbeam portion 12, and a third crossbeam portion 13 connected in sequence. The starting end of the first crossbeam portion 11 is fixedly connected to its end, forming a first buffer cavity 141. The second crossbeam portion 12 is oriented along one side of the first crossbeam portion 11, and together with the first crossbeam portion 11, forms a second buffer cavity 142 distributed on one side of the first buffer cavity 141. The third crossbeam portion 13 is oriented along the other side of the first crossbeam portion 11, and together with the first crossbeam portion 11, forms a third buffer cavity 143 distributed on the other side of the first buffer cavity 141. This arrangement forms three closed buffer cavities distributed sequentially along the orientation.

[0071] Preferably, the end of the second crossbeam portion 12 and the beginning of the third crossbeam portion 13 are both fixedly connected to the first top 111 of the first crossbeam portion 11. A second buffer cavity 142 is formed between the first top 111, the first side portion 112 of the first crossbeam portion 11 along its orientation, and the second crossbeam portion 12. The end of the third crossbeam portion 13 is fixedly connected to the second side portion 113 of the first crossbeam portion 11 along its orientation, and a third buffer cavity 143 is formed between the first top 111, the third crossbeam portion 13, and the second side portion 113.

[0072] It is understood that the first crossbeam portion 11 is equivalent to a reinforcing support structure formed between the starting end of the second crossbeam portion 12 and the end of the third crossbeam portion 13, and the first crossbeam portion 11 itself forms a reinforcing support structure. Compared to the crossbeams in the prior art... Figure 3The crossbeam body 1 has a simple structure and can effectively improve the load-bearing capacity of the first crossbeam portion 11. The end of the second crossbeam portion 12 and the beginning of the third crossbeam portion 13 are both fixedly supported on the first top 111 of the first crossbeam portion 11, which can further improve the structural strength of the formed crossbeam body 1 and further improve the load-bearing capacity of the formed crossbeam body 1 along the height direction of the vehicle, so as to further improve the vehicle body's crush resistance.

[0073] Preferably, such as Figure 1 and Figure 2 As shown, the first buffer cavity 141 is a trapezoidal buffer cavity. The trapezoidal shape provides good support stability, which can further enhance the structural strength, load-bearing capacity, and load-bearing stability of the first crossbeam 11 itself, thereby further improving the working performance of the crossbeam body 1.

[0074] Specifically, such as Figure 1 and Figure 2 As shown, the first crossbeam 11 also includes a bottom assembly.

[0075] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the angle formed between the first top 111 and the first side 112 is a first obtuse angle. The angle formed between the first top 111 and the second side 113 is a second obtuse angle. The angle formed between the bottom assembly and the first side 112 is a first acute angle. The angle formed between the bottom assembly and the second side 113 is a second acute angle. This makes the first buffer cavity 141 a trapezoidal buffer cavity. This further enhances the structural strength, load-bearing capacity, and load-bearing stability of the first crossbeam portion 11 itself forming a reinforced support structure, thereby further improving the working performance of the crossbeam body 1.

[0076] More preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the first buffer cavity 141 is an isosceles trapezoidal buffer cavity. That is, the angles of the first obtuse angle and the second obtuse angle are equal. The angles of the first acute angle and the second acute angle are equal. This further enhances the load-bearing stability of the reinforced support structure formed by the first crossbeam 11 itself.

[0077] As an alternative, the first buffer cavity 141 can also be configured as a square buffer cavity, etc.

[0078] Among them, such as Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, the first buffer cavity 141 and the second buffer cavity 142 combine to form a first combined buffer region. Preferably, the first combined buffer region is a trapezoidal buffer region. This can further improve the structural strength, load-bearing capacity, and load-bearing stability of the beam body 1, thereby further improving the working performance of the beam body 1.

[0079] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the second crossbeam portion 12 includes a third bottom portion 121, a third side portion 122, and a second top portion 123 connected in sequence. The bottom assembly is also connected to the third bottom portion 121. A second buffer cavity 142 is formed between the first top portion 111, the first side portion 112, the bottom assembly, the third bottom portion 121, the third side portion 122, and the second top portion 123.

[0080] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the included angle between the third side portion 122 and the second top portion 123 is a third obtuse angle. The included angle between the third side portion 122 and the third bottom portion 121 is also a third obtuse angle. This allows the first buffer cavity 141 and the second buffer cavity 142 to combine to form a trapezoidal buffer cavity in the first combined buffer area. This further enhances the structural strength, load-bearing capacity, and load-bearing stability of the first crossbeam portion 11 itself, thereby further improving the working performance of the crossbeam body 1.

[0081] More preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the first combined buffer area is an isosceles trapezoidal buffer area. That is, the angle of the second obtuse angle is equal to the angle of the third obtuse angle. The angle of the second acute angle is equal to the angle of the third acute angle. This can further improve the load-bearing stability of the beam body 1.

[0082] As an alternative, the first combined buffer area can also be set as a square combined buffer area, etc.

[0083] Among them, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the first buffer cavity 141 and the third buffer cavity 143 combine to form the second combined buffer region. Preferably, the second combined buffer region is a trapezoidal buffer region. This can further improve the structural strength, load-bearing capacity, and load-bearing stability of the beam body 1, thereby further improving the working performance of the beam body 1.

[0084] Specifically, such as Figure 1, Figure 2 , Figure 4 and Figure 6 As shown, the third crossbeam portion 13 includes a third top 131, a fourth side portion 132, a fourth bottom portion 133, and a fifth side portion 134 connected in sequence. The second top 123 is also connected in sequence to the third top 131. Both the second top 123 and the third top 131 are fixedly connected to the first top 111. The fifth side portion 134 is fixedly connected to the second side portion 113. A third buffer cavity 143 is formed between the first top 111, the third top 131, the fourth side portion 132, the fourth bottom portion 133, the fifth side portion 134, and the second side portion 113.

[0085] Specifically, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the included angle between the third top 131 and the fourth side 132 is a fourth obtuse angle. The included angle between the fourth side 132 and the fourth bottom 133 is also a fourth obtuse angle. This allows the first buffer cavity 141 and the third buffer cavity 143 to combine to form a trapezoidal buffer cavity in the second combined buffer area. This further enhances the structural strength, load-bearing capacity, and load-bearing stability of the first crossbeam portion 11 itself, thereby further improving the working performance of the crossbeam body 1.

[0086] More preferably, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the second combined buffer area is an isosceles trapezoidal buffer area. That is, the angles of the first obtuse angle and the fourth obtuse angle are equal. The angles of the first acute angle and the fourth acute angle are equal. This can further improve the load-bearing stability of the beam body 1. As an alternative, the second combined buffer area can also be set as a square combined buffer area, etc.

[0087] Furthermore, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, it can be understood that the angle of the third obtuse angle is equal to the angle of the fourth obtuse angle. The angle of the third obtuse angle is equal to the angle of the fourth acute angle. Therefore, the outer perimeter of the cross-section of the beam body 1 is an isosceles trapezoid. This further improves the load-bearing stability of the beam body 1. As an alternative, the second combined buffer area can also be set as a square combined buffer area, etc.

[0088] Among them, such as Figure 1 and Figure 2 As shown, the bottom assembly includes a first bottom 114 and a second bottom 115.

[0089] Specifically, such as Figure 4, Figure 6 and Figure 1 As shown, in this embodiment, the first bottom 114, the first side 112, the first top 111, the second side 113, the second bottom 115, the second crossbeam 12, and the third crossbeam 13 are connected sequentially. The ends of the first bottom 114 and the second bottom 115 are fixedly connected, forming a first buffer cavity 141 between the first bottom 114, the first side 112, the first top 111, the second side 113, and the second bottom 115. Furthermore, both the first side 112 and the first bottom 114 are located within the first combined buffer area.

[0090] Specifically, such as Figure 4 and Figure 5 As shown, the second bottom 115, the second side 113, the first top 111, the first side 112, the first bottom 114, the second crossbeam 12, and the third crossbeam 13 are connected in sequence. The second bottom 115 and the first bottom 114 are fixedly connected. Furthermore, the starting ends of the second bottom 115 and the second crossbeam 12 are fixedly connected.

[0091] This setting, relative to Figure 2 and Figure 6 Regarding the main body 1 of the crossbeam, as... Figure 2 , Figure 6 and Figure 1 The first side portion 112 and the first bottom portion 114 of the beam body 1 shown are both located within the first combined buffer area. This effectively reduces the amount of sheet metal used, thereby significantly improving the lightweight effect of the beam body 1. Secondly, compared to Figure 4 The crossbeam body 1 in the middle can improve the aesthetics.

[0092] Specifically, in this embodiment, such as Figure 5 , Figure 2 and Figure 1 As shown, since the crossbeam body 1 is made by rolling and welding sheet metal, when the first crossbeam part 11 is rolled, the first bottom 114 and the second bottom 115 are exposed to the outside. At this time, the first bottom 114 and the second bottom 115 are welded together to facilitate the subsequent rolling of the second crossbeam part 12 and the third crossbeam part 13.

[0093] Since both the first bottom 114 and the second bottom 115 are exposed to the outside, spot welding is preferred as the welding method for the ends of the first bottom 114 and the second bottom 115 to save costs. Because the standard weld width for spot welding is not less than 8mm, the weld width for spot welding of the first bottom 114 and the second bottom 115 is limited to be greater than or equal to 9mm to ensure the reliability of the welded connection between the first bottom 114 and the second bottom 115.

[0094] It is understandable that when the welding width of the spot weld between the first bottom 114 and the second bottom 115 is 10mm, 11mm, or 12mm, it will increase the directional extension length of the first bottom 114, and the welding material will also increase the total weight of the crossbeam body 1. This will also increase the welding workload. Therefore, it is preferable that the welding width of the spot weld between the first bottom 114 and the second bottom 115 is equal to 9mm. This can further improve the lightweight effect of the first crossbeam portion 11 while ensuring the connection reliability of the weld between the first bottom 114 and the second bottom 115, thereby further improving the lightweight effect of the crossbeam body 1. It can also further improve the production efficiency of the crossbeam body 1.

[0095] As an alternative, the ends of the first bottom 114 and the second bottom 115 are welded by laser welding. Since the standard weld width for laser welding is not less than 4mm, the weld width between the first bottom 114 and the second bottom 115 is limited to be greater than or equal to 4mm to ensure the reliability of the welded connection between the first bottom 114 and the second bottom 115.

[0096] If laser welding is used, it is understood that when the weld width of the spot weld between the first bottom 114 and the second bottom 115 is 5mm, 6mm, or 7mm, it will increase the directional extension length of the first bottom 114, thus increasing the total weight of the beam body 1. It will also increase the welding workload. Therefore, it is preferable that the weld width of the laser weld between the first bottom 114 and the second bottom 115 is equal to 4mm. This can further improve the lightweight effect of the first beam portion 11 while ensuring the structural strength of the first beam portion 11, thereby further improving the lightweight effect of the beam body 1. It can also further improve the production efficiency of the beam body 1.

[0097] It is understandable that when the ends of the first bottom 114 and the second bottom 115 are welded by laser welding, the first crossbeam portion 11 has a better lightweight effect, and the resulting crossbeam body 1 has a better lightweight effect.

[0098] Specifically, such as Figure 4 , Figure 5 and Figure 1 As shown, in this embodiment, the second bottom 115 is also connected to the third bottom 121 in sequence. A second buffer cavity 142 is formed between the first top 111, the first side 112, the first bottom 114, the third bottom 121, the third side 122, and the second top 123.

[0099] It is understandable that the top of the beam body 1 includes a second top 123 and a third top 131.

[0100] Specifically, since the crossbeam body 1 is made by rolling and welding sheet metal, when the second crossbeam portion 12 is rolled, the first top 111 is located below the second top 123 and the third top 131, and is located inside the crossbeam body 1. Therefore, laser welding is used to weld the end of the second crossbeam portion 12 and the beginning of the third crossbeam portion 13 to the first top 111. That is, the second top 123 and the third top 131 are both laser welded to the first top 111. This facilitates the subsequent rolling of the third crossbeam portion 13.

[0101] For laser welding, the standard weld width is not less than 4mm. Therefore, in the extension direction from the end of the second crossbeam 12 to the beginning of the third crossbeam 13, i.e., from the second top 123 to the third top 131, the weld width of both the second top 123 and the third top 131 laser-welded to the first top 111 is limited to be greater than or equal to 4mm. This ensures the reliability of the connection between the second top 123 and the third top 131 welded to the first top 111.

[0102] It is understandable that when the weld width of both the second top 123 and the third top 131 laser-welded to the first top 111 is 5mm, 6mm, or 7mm, it will increase the welding workload. Therefore, it is preferable that the weld width of both the second top 123 and the third top 131 laser-welded to the first top 111 is equal to 4mm, in order to further improve the production efficiency of the crossbeam body 1.

[0103] in, Figure 4 The welding methods of the three fixed connections of the crossbeam body 1 are respectively the same as those of the crossbeam body 1. Figure 5 The welding methods at the three fixed connections of the crossbeam body 1 are identical, so they will not be described in detail here. Figure 2 The three fixed connections of the crossbeam body 1 are all fixed by laser welding.

[0104] Preferably, such as Figure 1 , Figure 3 and Figure 1As shown, the bends at the first top 111, the first side 112, the second side 113, the second crossbeam 12, and the third crossbeam 13 are all rounded. Specifically, the first top 111 has a rounded corner structure. The connection between the first side 112 and the first bottom 114 has a rounded corner structure. The connection between the second side 113 and the second bottom 115 has a rounded corner structure. The connection between the third bottom 121 and the third side 122 has a rounded corner structure. The connection between the third side 122 and the second top 123 has a rounded corner structure. The connection between the third top 131 and the fourth side 132 has a rounded corner structure. The connection between the fourth side 132 and the fourth bottom 133 has a rounded corner structure. The connection between the fourth bottom 133 and the fifth side 134 has a rounded corner structure. This configuration effectively reduces the risk of cracks at the various bends of the crossbeam body 1.

[0105] More preferably, the ratio of the radius of the rounded corner structure to the thickness of the beam body 1 is greater than or equal to 4. This is to prevent cracks from forming at the various bends of the beam body 1. It is understood that the beam body 1 is an integral structure formed by rolling and welding plates of equal thickness.

[0106] In this embodiment, the ratio of the radius of the rounded corner structure to the thickness of the beam body 1 is preferably 4. This further enhances the lightweight effect of the beam body 1 while avoiding cracks at various bends. It is understood that in other embodiments, the ratio of the radius of the rounded corner structure to the thickness of the beam body 1 may also be 4.5 or 5, etc.

[0107] Among them, such as Figure 4 and Figure 5 As shown, the crossbeam 100 also includes a reinforcing support 2 fixedly connected to the crossbeam body 1. The reinforcing support 2 is used to strengthen the structural strength of the crossbeam body 1, thereby further improving the structural strength of the crossbeam 100.

[0108] In this embodiment, the third buffer cavity 143, the first buffer cavity 141, and the second buffer cavity 142 are distributed sequentially from front to back along the length of the vehicle. The length of the crossbeam body 1 is parallel to the direction of the vehicle.

[0109] In this embodiment, as Figure 1 and Figure 7As shown, the span of the third buffer cavity 143 along the length of the vehicle is smaller than the span of the second buffer cavity 142 along the length of the vehicle. Therefore, it is preferable to position the reinforcing support 2 within the second buffer cavity 142 on the side away from the first buffer cavity 141. In a head-on collision, this not only further enhances the bending resistance of the crossbeam body 1, but also facilitates the installation of the reinforcing support 2 within the second buffer cavity 142. Furthermore, it allows for the provision of through holes or similar features on the fourth bottom 133 to facilitate the connection of the crossbeam body 1 to the external structure.

[0110] More preferably, such as Figure 1 , Figure 7 and Figure 1 As shown, the reinforcing support 2 includes a first reinforcing part 21 and a second reinforcing part 22 connected at an obtuse angle. The first reinforcing part 21 is fixedly connected to the top of the second crossbeam part 12, and the second reinforcing part 22 is fixedly connected to the side of the second crossbeam part 12. That is, the first reinforcing part 21 is fixedly connected to the second top 123, and the second reinforcing part 22 is fixedly connected to the third side 122. This arrangement ensures that the reinforcing support 2 strengthens the structural strength of the crossbeam body 1, and also facilitates the provision of through holes or the like at the third bottom 121 to connect the crossbeam body 1 to an external structure.

[0111] Furthermore, in this embodiment, as Figure 4 , Figure 7 and Figure 1 As shown, the second top 123 is provided with a first through hole 1231, through which the welding head can pass to connect the second top 123 and the first reinforcing part 21 by MIG welding. As an alternative, laser welding or other methods can also be used to fix the first reinforcing part 21 to the second top 123.

[0112] Furthermore, in this embodiment, as Figure 4 , Figure 7 and Figure 1 As shown, the third side portion 122 is provided with a second through hole 1221, through which the welding head can pass to connect the second reinforcing part 22 and the third side portion 122 by means of MIG welding. As an alternative, laser welding or other methods can also be used to fix the second reinforcing part 22 and the third side portion 122 together.

[0113] It is understood that reinforcing support members 2 can be provided on the side of the second buffer cavity 142 away from the first buffer cavity 141. And / or, reinforcing support members 2 can be provided at other locations within the second buffer cavity 142. And / or, reinforcing support members 2 can be provided within the first buffer cavity 141. And / or, reinforcing support members 2 can be provided within the third buffer cavity 143. The number and location of the reinforcing support members can be adjusted adaptively according to requirements.

[0114] The crossbeam body 1 is made of ultra-high-strength steel plate. Preferably, the ultra-high-strength steel plate has a strength greater than or equal to 1500 MPa. This enhances the structural strength of the crossbeam body 1 while further improving its lightweight effect. It is understood that the strength of the ultra-high-strength steel plate can be 1500 MPa, 1600 MPa, or 1700 MPa, etc.

[0115] like Figure 4 and Figure 7 As shown, the present invention also provides a crossbeam assembly 200, including two crossbeam side plates 3 and the aforementioned crossbeam 100. The two ends of the crossbeam body 1 along its length are respectively fixedly connected to the two crossbeam side plates 3 in a one-to-one correspondence. By employing the aforementioned crossbeam 100, production efficiency can be effectively improved with low production costs. Furthermore, it can effectively improve the structural strength, bending resistance, deformation resistance, and load-bearing capacity of the crossbeam assembly 200 while maintaining a lightweight design, thereby reducing the risk of the vehicle body being crushed.

[0116] Specifically, such as Figure 8 and Figure 9 As shown, the crossbeam side plate 3 includes a first connecting part 31 and two second connecting parts 32. The first connecting part 31 is fixedly connected to the second top 123 and the third top 131 of the crossbeam body 1. One of the second connecting parts 32 is fixedly connected to the third side 122, and the other second connecting part 32 is fixedly connected to the fourth side 132. This allows the two crossbeam side plates 3 to be fixedly connected to both ends of the crossbeam body 1 along its length.

[0117] Furthermore, the first connecting part 31 is connected to the second top 123 and the third top 131 of the crossbeam body 1 by welding. As an alternative, the first connecting part 31 can also be fixedly connected to the second top 123 and the third top 131 of the crossbeam body 1 by laser welding or other methods.

[0118] Furthermore, one of the second connecting portions 32 is connected to the third side portion 122 by welding. The other second connecting portion 32 is connected to the fourth side portion 132 by welding. Alternatively, one of the second connecting portions 32 can be fixedly connected to the third side portion 122 by laser welding or similar methods. The other second connecting portion 32 can also be fixedly connected to the fourth side portion 132 by laser welding or similar methods.

[0119] like Figure 8 As shown, the present invention also provides a vehicle floor assembly 300, including a floor body 4 and the aforementioned crossbeam assembly 200, wherein the crossbeam body 1 and two crossbeam side plates 3 are fixedly connected to the floor body 4. By adopting the aforementioned crossbeam assembly 200, production efficiency can be effectively improved with low production costs; secondly, the working performance of the vehicle floor assembly 300 can be effectively improved while maintaining a lightweight design.

[0120] In this embodiment, the third buffer cavity 143, the first buffer cavity 141, and the second buffer cavity 142 of the crossbeam body 1 are distributed sequentially from front to back along the length of the vehicle.

[0121] Specifically, such as Figure 9 As shown, the top of the beam body 1 is provided with a third through hole 1311 connecting to the third buffer cavity 143, and the bottom of the beam body 1 is provided with a fourth through hole 1331 connecting to the third buffer cavity 143. A welding head can pass through the third through hole 1311, the third buffer cavity 143, and the fourth through hole 1331 to weld the bottom of the beam body 1 to the floor body 4. This achieves a fixed connection between the beam body 1 and the floor body 4.

[0122] Specifically, such as Figure 10 , Figures 8-10 and Figure 4 As shown, the third via 1311 is provided at the third top 131. The fourth via 1331 is provided at the fourth bottom 133.

[0123] Furthermore, such as Figure 8 and Figure 9 As shown, there are multiple third through holes 1311 and multiple fourth through holes 1331. These multiple third through holes 1311 are spaced apart along the length of the beam body 1, and each of the multiple third through holes 1311 corresponds to one of the multiple fourth through holes 1331. This arrangement increases the area where the fourth bottom 133 is welded to the floor body 4 along the length of the beam body 1, thereby improving the connection reliability between the beam body 1 and the floor body 4. The fourth bottom 133 is fixedly connected to the floor body 4 by spot welding. This ensures connection reliability and allows for direct welding of the fourth bottom 133 to the floor body 4, further reducing production costs. Furthermore, the inclusion of third through holes 1311 and fourth through holes 1331 also further enhances the lightweight effect of the beam body 1.

[0124] Optionally, such as Figure 8 He Ru Figure 9 As shown, the second top 123 has a fifth through hole 1232. The third bottom 121 has a sixth through hole. The welding head can pass through the fifth through hole 1232, the second buffer cavity 142, and the sixth through hole to weld the third bottom 121 and the floor body 4. This arrangement can further improve the connection reliability of fixing the beam body 1 and the floor body 4. The welding method of the third bottom 121 and the floor body 4 is similar to the welding method of the fourth bottom 133 and the floor body 4, and will not be described again here.

[0125] Furthermore, such as Figure 4 and Figures 8-10As shown, there are multiple fifth through holes 1232 and multiple sixth through holes. The multiple fifth through holes 1232 are distributed at intervals along the length direction of the beam body 1, and the multiple fifth through holes 1232 correspond one-to-one with the multiple sixth through holes. This arrangement can further improve the connection reliability of the fixed connection between the beam body 1 and the floor body 4.

[0126] The crossbeam body 1 is parallel to the width direction of the vehicle along its length. The vehicle floor assembly 300 also includes a battery frame, with the bottom rear end of the crossbeam body 1 fixedly connected to the battery frame along the length of the vehicle. Because the crossbeam body 1 has good structural strength, bending resistance, deformation resistance, and load-bearing capacity, fixing the bottom rear end of the crossbeam body 1 to the battery frame along the length of the vehicle effectively reduces the risk of damage to the battery pack within the battery frame in a head-on collision.

[0127] Specifically, such as Figure 7 and Figure 8 As shown, the top of the crossbeam body 1 is provided with a seventh through hole 1233 that connects to the second buffer cavity 142. Fasteners pass through the seventh through hole 1233 into the second buffer cavity 142 and connect the bottom of the crossbeam body 1 to the battery frame. Further, as... Figure 8 , Figure 9 and Figure 4 As shown, a seventh through hole 1233 is provided at the second top 123. A first mounting hole is provided at the third bottom 121. Fasteners include bolts and nuts. The bolt passes through the seventh through hole 1233 into the second buffer cavity 142. Then, the bolt passes through the first mounting hole, the floor body 4, and the second mounting hole on the battery frame and is threaded to the nut. This achieves the connection of the battery frame to the rear bottom of the crossbeam body 1 along the length of the vehicle.

[0128] Furthermore, such as Figure 8 and Figure 9 As shown, there are multiple seventh through holes 1233, multiple first mounting holes, and multiple second mounting holes. The multiple seventh through holes 1233 are distributed at intervals on the second top 123, and the multiple seventh through holes 1233, multiple first mounting holes, and multiple second mounting holes are arranged in a one-to-one correspondence. This arrangement is to improve the connection reliability of the battery frame to the floor body 4 and the crossbeam body 1.

[0129] Among them, such as Figure 8 and Figure 9 As shown, the crossbeam side plate 3 also includes two third connecting parts 33, which are distributed at intervals on both sides of the crossbeam body 1 along the length direction of the vehicle and are both fixedly connected to the floor body 4. This arrangement is to fix the crossbeam side plate 3 to the floor body 4.

[0130] Specifically, the third connecting part 33 is connected to the floor body 4 by welding. As an alternative, laser welding or other methods can also be used to fix the third connecting part 33 to the floor body 4.

[0131] Among them, such as Figure 8 Figure 9 Figures 8-11 As shown, the floor assembly also includes a seat bracket 5. Two fourth connecting portions 51 of the seat bracket 5 are fixedly connected to both sides of the crossbeam body 1 along the length direction of the vehicle, and two fifth connecting portions 52 of the seat bracket 5 are spaced apart along the width direction of the vehicle and fixedly connected to the top of the crossbeam body 1. This arrangement secures the seat bracket 5 to the crossbeam body 1.

[0132] Specifically, one fourth connecting part 51 is fixedly connected to the third side part 122. Another fourth connecting part 51 is fixedly connected to the fourth side part 132. The fifth connecting part 52 is fixedly connected to the second top 123 and the third top 131 of the crossbeam body 1.

[0133] Specifically, the fourth connecting part 51 is connected to the third side part 122 by welding. As an alternative, the fourth connecting part 51 and the third side part 122 can also be fixedly connected by MIG welding or laser welding.

[0134] Specifically, the other fourth connecting part 51 is connected to the fourth side part 132 by welding. As an alternative, the other fourth connecting part 51 can also be fixedly connected to the fourth side part 132 by means of MIG welding or laser welding.

[0135] Specifically, the fifth connecting part 52 is connected to the second top 123 and the third top 131 of the crossbeam body 1 by welding. As an alternative, the fifth connecting part 52 can also be fixedly connected to the second top 123 and the third top 131 of the crossbeam body 1 by means of MIG welding or laser welding.

[0136] The specific structures of the floor body 4 and the seat support 5 are existing technologies and will not be described in detail here.

[0137] The present invention also provides a vehicle including the aforementioned vehicle floor assembly 300. By adopting the aforementioned vehicle floor assembly 300, production efficiency can be effectively improved while production costs are low; secondly, vehicle safety can be effectively improved while maintaining a lightweight design.

[0138] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A crossbeam, characterized in that, It includes a crossbeam body (1), which is an integral structure, and the cross section of the crossbeam body (1) forms at least three closed buffer cavities distributed sequentially along the orientation.

2. The crossbeam according to claim 1, characterized in that, The crossbeam body (1) includes a first crossbeam section (11), a second crossbeam section (12), and a third crossbeam section (13) connected in sequence; The starting end of the first crossbeam portion (11) is fixedly connected to the end of the first crossbeam portion (11) to form a first buffer cavity (141); the second crossbeam portion (12) is located on one side of the first crossbeam portion (11) along the orientation, and forms a second buffer cavity (142) distributed on one side of the first buffer cavity (141) with the first crossbeam portion (11); the third crossbeam portion (13) is located on the other side of the first crossbeam portion (11) along the orientation, and forms a third buffer cavity (143) distributed on the other side of the first buffer cavity (141) with the first crossbeam portion (11).

3. The crossbeam according to claim 2, characterized in that, The end of the second crossbeam (12) and the beginning of the third crossbeam (13) are both fixedly connected to the first top (111) of the first crossbeam (11); the first top (111), the first crossbeam (11) and the second crossbeam (12) form the second buffer cavity (142) along the first side (112) of the orientation; The end of the third crossbeam (13) is fixedly connected to the first crossbeam (11) along the second side (113) of the orientation, and the third buffer cavity (143) is formed between the first top (111), the third crossbeam (13) and the second side (113).

4. The crossbeam according to claim 3, characterized in that, The end of the second crossbeam (12) and the beginning of the third crossbeam (13) are both laser-welded to the first top (111); The welding width is greater than or equal to 4 mm in the direction extending from the end of the second crossbeam (12) to the beginning of the third crossbeam (13).

5. The crossbeam according to claim 3, characterized in that, The end of the third crossbeam (13) is laser welded to the second side (113); the welding width is greater than or equal to 4 mm along the extension direction of the second side (113).

6. The crossbeam according to claim 3, characterized in that, The bends of the first top (111), the first side (112), the second side (113), the second crossbeam (12), and the third crossbeam (13) are all formed with rounded corners. The ratio of the radius of the rounded corner structure to the thickness of the beam body (1) is greater than or equal to 4.

7. The crossbeam according to any one of claims 2-6, characterized in that, The first buffer cavity (141) is a trapezoidal buffer cavity.

8. The crossbeam according to any one of claims 2-6, characterized in that, The first buffer cavity (141) and the second buffer cavity (142) are combined to form a first combined buffer region, which is a trapezoidal buffer region.

9. The crossbeam according to any one of claims 2-6, characterized in that, The first buffer cavity (141) and the third buffer cavity (143) are combined to form a second combined buffer region, which is a trapezoidal buffer region.

10. The crossbeam according to any one of claims 2-6, characterized in that, The first crossbeam portion (11) includes a first top (111), a first side portion (112), a second side portion (113), a first bottom portion (114), and a second bottom portion (115). The first bottom portion (114), the first side portion (112), the first top portion (111), the second side portion (113), the second bottom portion (115), the second crossbeam portion (12), and the third crossbeam portion (13) are connected in sequence. The ends of the first bottom portion (114) and the second bottom portion (115) are fixedly connected.

11. The crossbeam according to claim 10, characterized in that, Along the orientation, the weld width of the laser weld between the first bottom (114) and the second bottom (115) is greater than or equal to 4 mm; or, the weld width of the spot weld between the first bottom (114) and the second bottom (115) is greater than or equal to 9 mm.

12. The crossbeam according to any one of claims 2-6, characterized in that, The crossbeam also includes a reinforcing support (2) fixedly connected to the crossbeam body (1), and the reinforcing support (2) is used to strengthen the structural strength of the crossbeam body (1).

13. The crossbeam according to claim 12, characterized in that, The reinforcing support (2) is located in the second buffer cavity (142) on the side away from the first buffer cavity (141).

14. The crossbeam according to claim 12, characterized in that, The reinforcing support (2) includes a first reinforcing part (21) and a second reinforcing part (22) connected to each other. The first reinforcing part (21) is fixedly connected to the top of the second crossbeam part (12), and the second reinforcing part (22) is fixedly connected to the side of the second crossbeam part (12).

15. A crossbeam assembly, comprising two crossbeam side plates (3), characterized in that, It also includes the crossbeam as described in any one of claims 1-14, wherein the two ends of the crossbeam body (1) along the length direction are respectively fixedly connected to the two crossbeam side plates (3) in a one-to-one correspondence.

16. A vehicle floor assembly, comprising a floor body (4), characterized in that, It also includes the beam assembly of claim 15, wherein the beam body (1) and the two beam side plates (3) are fixedly connected to the floor body (4).

17. The vehicle floor assembly according to claim 16, characterized in that, The length direction of the crossbeam body (1) is parallel to the width direction of the vehicle. The vehicle floor assembly also includes a battery frame. The bottom rear end of the crossbeam body (1) along the length direction of the vehicle is fixedly connected to the battery frame.

18. A vehicle, characterized in that, Includes the vehicle floor assembly as described in any one of claims 16-17.

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