Seat beam assembly, floor assembly and automobile

Abstract

The invention discloses a seat cross beam assembly, a floor assembly and an automobile. The seat cross beam assembly comprises a cross beam body and a reinforcing beam. The cross beam main body is provided with a plurality of cavities, the cavities extend in the length direction of the cross beam main body, and the cavity walls of the cavities are closed in the circumferential direction; the reinforcing beam is of a tubular structure which is closed in the circumferential direction; the reinforcing beam is arranged in at least one cavity, and the reinforcing beam is fixedly connected with the cross beam main body. The seat cross beam assembly has good bending resistance and crushing resistance.

Description

TECHNICAL FIELD

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

[0002] In the related art, the seat cross beam assembly of a vehicle includes a left cross beam assembly structure and a right cross beam assembly structure, each of which includes a cross beam main body, a plurality of cross beam stiffeners, and a seat joint for mounting a seat, etc. These parts are generally separately formed by stamping and then integrated together by mechanical connection methods such as welding, bolt connection or gluing. The bending resistance and crushing resistance of the seat cross beam assembly are poor. SUMMARY

[0003] The purpose of the present application is to provide a seat cross beam assembly, a floor assembly and a vehicle, which can improve the bending resistance and crushing resistance of the seat cross beam assembly by optimizing the structure of the seat cross beam assembly.

[0004] To solve the above technical problems, the present application provides a seat cross beam assembly, comprising:

[0005] A cross beam main body, the cross beam main body has a plurality of cavities, the cavities extend along the length direction of the cross beam main body, and the cavity walls forming the cavities are closed in the circumferential direction;

[0006] A reinforcing beam, the reinforcing beam is a circumferentially closed tubular structure;

[0007] At least one of the cavities is provided with the reinforcing beam, and the reinforcing beam is fixedly connected with the cross beam main body.

[0008] In an implementable scheme, the cross beam main body includes a beam top wall and two beam side walls, and the two beam side walls are respectively arranged on both sides of the beam top wall;

[0009] The plurality of cavities includes a first cavity, at least one second cavity and at least one third cavity, the second cavity is located between the first cavity and one of the beam side walls, and the third cavity is located between the first cavity and the other beam side wall;

[0010] The first cavity is fixedly provided with the reinforcing beam.

[0011] In an implementable scheme, the plurality of cavities further includes at least one fourth cavity, and the fourth cavity is located between the first cavity and the beam top wall.

[0012] In one feasible embodiment, the beam body further includes a beam bottom wall, the bottom edges of the two beam side walls are connected to the beam bottom wall, the beam bottom wall includes a bottom wall body located between the two beam side walls, the bottom wall body is recessed in the direction of the beam top wall to form a recess with an opening facing away from the beam top wall.

[0013] In one feasible embodiment, the first chamber has a rectangular cross-section, while the second, third, and fourth chambers all have trapezoidal cross-sections.

[0014] In one feasible embodiment, the bottom wall of the crossbeam body has mounting holes for mounting a battery pack; both the crossbeam body and the reinforcing beam have through holes communicating with the mounting holes for fasteners for mounting the battery pack to pass through.

[0015] In one feasible embodiment, the seat crossbeam assembly further includes at least two bracket assemblies for mounting the seat; each bracket assembly includes multiple mounting brackets fixedly connected to the crossbeam body; each mounting bracket includes a bracket body, the bracket body having two first connecting plates folded outward at the bottom of two peripheral walls in the length direction of the crossbeam body, and two second connecting plates folded outward at the bottom of two peripheral walls in the width direction of the crossbeam body, the first connecting plates being fixedly connected to the top wall of the crossbeam body, and the second connecting plates being fixedly connected to the side walls of the crossbeam body.

[0016] In one feasible embodiment, the beam body includes a beam top wall, a beam bottom wall, and two beam side walls. The beam bottom wall includes a bottom wall body connecting the two beam side walls and an extension wall portion extending outward from the beam side walls.

[0017] The seat crossbeam assembly further includes two end joints, which are respectively fixedly connected to both ends of the crossbeam body in the length direction; the end joints include a first flange, a second flange, and a third flange facing the crossbeam body, the first flange being fixedly connected to the top wall of the beam, the second flange being fixedly connected to the side wall of the beam, and the third flange being fixedly connected to the extended wall portion; the end joints also include a fourth flange facing away from the crossbeam body, which is used for fixed connection with the sill beam.

[0018] In one feasible solution, the main body of the crossbeam is a one-piece molded structure.

[0019] This application embodiment also provides a floor assembly, including a floor body, a sill beam, and a seat crossbeam assembly. The bottom of the seat crossbeam assembly is fixedly connected to the floor body, and the end of the seat crossbeam assembly is fixedly connected to the sill beam. The seat crossbeam assembly is any of the seat crossbeam assemblies described above.

[0020] This application embodiment also provides a car, including a battery pack, and the seat beam assembly described above, or the floor assembly described above;

[0021] The battery pack is located below the main body of the crossbeam, and the battery pack is fixedly connected to the main body of the crossbeam.

[0022] The seat crossbeam assembly provided in this application embodiment is applied to an automobile. The main body of the seat crossbeam assembly has multiple chambers extending along its length, and the chamber walls are circumferentially closed. A reinforcing beam is fixedly connected to at least one chamber of the main body of the crossbeam, and the reinforcing beam is a circumferentially closed tubular structure. This structural design of the seat crossbeam assembly can improve the structural strength and stiffness of the main body of the crossbeam itself. The multiple circumferentially closed chambers of the main body of the crossbeam can improve the bending resistance and crush resistance of the main body of the crossbeam. The chambers with reinforcing beams and the reinforcing beams form a nested chamber structure, which can improve the overall structural strength and stiffness of the seat crossbeam assembly, giving the seat crossbeam assembly good bending resistance and crush resistance. When the automobile is subjected to a frontal collision, the aforementioned structure of the seat crossbeam assembly can effectively disperse the collision energy and prevent the vehicle body from being crushed. When the automobile is subjected to a side collision, it can fully absorb the collision energy and protect the battery pack. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the seat beam assembly in one embodiment provided in this application;

[0024] Figure 2 for Figure 1 Exploded view of the seat crossbeam assembly shown;

[0025] Figure 3 for Figure 1 The diagram shows a top view of the structural structure of the seat beam assembly.

[0026] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the seat beam assembly at the location of the mounting bracket.

[0027] Figure 5 for Figure 1 A cross-sectional view of the main body of the crossbeam at the location of the through hole;

[0028] Figure 6 for Figure 1A partial structural diagram of the middle seat crossbeam assembly at the location of the end joint;

[0029] Figure 7 for Figure 1 A schematic diagram of the structure of the mounting bracket;

[0030] Figure 8 for Figure 1 A schematic diagram of the middle end connector.

[0031] Explanation of reference numerals in the attached figures:

[0032] Seat crossbeam assembly 10, floor body 20;

[0033] The beam body 11, the top wall of the beam 111, the side wall of the beam 112, the bottom wall of the beam 113, the bottom wall body 1131, the extended wall portion 1132, the first rib 1151, the second rib 1152, the third rib 1153, the fourth rib 1154, the fifth rib 1155, the mounting hole 116, the through hole 117, the first chamber 1101, the second chamber 1102, the third chamber 1103, the fourth chamber 1104, and the recess 1105;

[0034] Reinforcing beam 12, connecting part 121;

[0035] First support group 13A, second support group 13B, mounting bracket 131, support body 1311, first connecting plate 1312, second connecting plate 1313, reinforcing rib plate 1314;

[0036] End connector 14, connector main board 141, first flange 142, second flange 143, third flange 144, fourth flange 145;

[0037] 01 Blind rivet, 02 Flow drill screw, 03 SPR connection point. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] The ordinal numbers used in this article, such as first and second, are used to distinguish different parts with the same name and do not indicate a specific order or primary / secondary relationship.

[0040] For ease of understanding and description, this document defines three directions for the seat crossbeam assembly: the X-axis represents the width of the seat crossbeam assembly, which is also the length of the vehicle; the Y-axis represents the length of the seat crossbeam, which is also the width of the vehicle; and the Z-axis represents the thickness (or height) of the seat crossbeam, which is also the height of the vehicle. The X-axis also represents the front-to-back direction, and the Z-axis also represents the vertical direction. These directional definitions are merely for clarity and convenience in describing the technical solution and do not constitute a limitation on the scope of protection.

[0041] Please refer to Figures 1 to 3 , Figure 1 This is a structural schematic diagram of the seat beam assembly in one embodiment provided in this application. Figure 2 for Figure 1 The exploded view shown is of the seat crossbeam assembly. Figure 3 for Figure 1 The diagram shows a top-view structural schematic of the seat crossbeam assembly.

[0042] The seat crossbeam assembly 10 provided in this embodiment can be applied to automobiles. The seat crossbeam assembly 10 includes a crossbeam body 11 and a reinforcing beam 12.

[0043] The main body of the crossbeam 11 has multiple chambers, each chamber extending along the length direction (Y-axis direction) of the main body of the crossbeam 11, and the chamber walls are circumferentially closed.

[0044] The reinforcing beam 12 is a circumferentially closed tubular structure.

[0045] A reinforcing beam 12 is provided in at least one cavity of the main body 11 of the crossbeam, and the reinforcing beam 12 is fixedly connected to the main body 11 of the crossbeam.

[0046] The aforementioned circumferential closure means that the cavity wall forming the chamber does not have a through opening along the length of the chamber, and the beam wall of the reinforcing beam 12 does not have a through opening along the length of the reinforcing beam 12. However, as needed, the cavity wall forming the chamber or the beam wall of the reinforcing beam 12 may have through holes for installing or facilitating the installation of other components. Overall, except at the locations of possible through holes, the cross-section of the chamber or the reinforcing beam 12 is essentially a closed section.

[0047] With the above solution, the main body 11 of the seat crossbeam assembly 10 has multiple circumferentially closed chambers, which is beneficial to improving the bending resistance and crush resistance of the main body 11 itself. At the same time, a tubular reinforcing beam 12 is fixed in at least one chamber of the main body 11 to form a nested chamber structure, which can improve the overall structural strength and rigidity of the seat crossbeam assembly 10, so that the seat crossbeam assembly 10 as a whole has better bending resistance and crush resistance.

[0048] In one embodiment, the main body 11 of the crossbeam adopts a one-piece molding structure. This gives the main body 11 of the crossbeam itself good structural strength and rigidity. Furthermore, the one-piece molding structure of the main body 11 of the seat crossbeam assembly 10, compared to traditional welded structures, reduces the number of parts, reduces production processes, simplifies assembly processes, and helps save manufacturing costs and improve manufacturing efficiency.

[0049] Please combine them together Figure 4 and Figure 5 , Figure 4 for Figure 1 The diagram shows a cross-sectional view of the seat beam assembly at the location of the mounting bracket. Figure 5 for Figure 1 A cross-sectional view of the main body of the central crossbeam at the location of the through-hole. Among them, Figure 4 The cross-sectional position of the structure shown can be understood as Figure 3 CC position in the middle, Figure 5 The cross-sectional position of the structure shown can be understood as Figure 3 The DD direction position in the middle; Figure 4 and Figure 5 The illustration also shows the floor of the car body, which is assembled with the main beam.

[0050] The main body 11 of the crossbeam includes a top wall 111, two side walls 112, and a bottom wall 113. The two side walls 112 are respectively located on both sides of the top wall 111, that is, on both sides of the top wall 111 in the X-axis direction. In the Z-axis direction, the top end of the side wall 112 is connected to the top wall 111, and the bottom end of the side wall 112 is connected to the bottom wall 113. The top wall 111, the two side walls 112, and the bottom wall 113 can enclose a circumferentially closed internal space.

[0051] The main body of the crossbeam 11 also includes a plurality of ribs provided in the aforementioned internal space to divide the internal space into the aforementioned plurality of chambers.

[0052] In one embodiment, the beam body 11 includes a first chamber 1101, at least one second chamber 1102 and at least one third chamber 1103, wherein the second chamber 1102 is located between the first chamber 1101 and a beam sidewall 112, and the third chamber 1103 is located between the first chamber 1101 and another beam sidewall 112.

[0053] A reinforcing beam 12 is provided in the first chamber 1101.

[0054] In the application, the seat crossbeam assembly 10 is mounted on the floor body 20 of the vehicle body. The length direction of the seat crossbeam assembly 10 extends along the width direction of the vehicle. One beam sidewall 112 of the crossbeam body 11 is located behind the other beam sidewall 112. Thus, the aforementioned second chamber 1102, first chamber 1102 and third chamber 1103 are arranged approximately in the length direction of the vehicle.

[0055] Taking the second chamber 1102 located in front of the third chamber 1103 as an example, when the vehicle body is subjected to a frontal collision, the second chamber 1102 of the seat crossbeam assembly 10 is impacted first by the collision impact force, absorbing some of the collision energy and transferring the collision force to the first chamber 1101. Since the first chamber 1101 is equipped with a reinforcing beam 12, the area where the first chamber 1101 is located has a large load-bearing capacity and can absorb most of the collision energy, reducing the collision force transferred to the third chamber 1103, which is beneficial to protecting the related structures behind the seat crossbeam assembly 10. When the vehicle body is subjected to a side collision, the combination of the crossbeam body 11 with its multi-chamber cross-section design and the reinforcing beam 12 can effectively improve the crush resistance of the seat crossbeam assembly 10.

[0056] In another embodiment, the multiple chambers of the beam body 11 may include at least one fourth chamber 1104 in addition to the first chamber 1101, the second chamber 1102 and the third chamber 1103 described above. The fourth chamber 1104 is located between the beam top wall 111 and the first chamber 1101.

[0057] In this way, when the seat beam assembly 10 is subjected to a frontal collision impact force, it can form a force transmission path from the first chamber 1101 to the fourth chamber 1104, so that the collision impact force can be transmitted in multiple directions, thereby reducing the impact force borne by a single chamber structure, which in turn helps to improve the overall impact resistance of the seat beam assembly 10.

[0058] In another embodiment, at least a portion of the bottom wall 113 of the beam body 11 may be recessed toward the top wall 111 to form a recess 1105 with an opening facing away from the top wall 111, in combination with Figure 4 and Figure 5 After the main body 11 of the crossbeam is fixedly connected to the floor body 20 of the vehicle body, the opening of the recess 1105 can be sealed by the floor body 20, thereby forming a cavity structure located below the first chamber 1101 between the main body 11 of the crossbeam and the floor body 20. This arrangement is beneficial for the dispersion and transmission of force when the seat crossbeam assembly 10 is subjected to a collision impact, and also helps to improve the impact resistance of the seat crossbeam assembly 10.

[0059] In a specific implementation, to facilitate the connection between the crossbeam main body 11 and the floor main body 20, the bottom wall 113 of the crossbeam main body 11 includes a bottom wall body 1131 located between two beam side walls 112 and an extension wall portion 1132 extending outward from the beam side wall 112. The bottom wall 113 includes two extension wall portions 1132. Here, the outer side of the beam side wall 112 refers to the side away from the inner space of the crossbeam main body 11.

[0060] During specific implementation, the bottom wall body 1131 of the bottom wall 113 is recessed towards the beam top wall 111 to form the aforementioned recess 1105. The extension wall portion 1132 is substantially parallel to the floor main body 20 to facilitate the assembly of the extension wall portion 1132 and the floor main body 20.

[0061] In Figure 4 and Figure 5 In a specific application example shown, a first chamber 1101, a second chamber 1102, a third chamber 1103, and a fourth chamber 1104 are formed in the inner space of the crossbeam main body 11. The second chamber 1102, the third chamber 1103, and the fourth chamber 1104 surround the outer periphery of the first chamber 1101 in a layout resembling a Chinese character "pin". Only a reinforcing beam 12 is fixedly provided in the first chamber 1101.

[0062] Five rib bodies are provided in the inner space of the crossbeam main body 11 to form the aforementioned four chambers. For the convenience of description, these five rib bodies are respectively called the first rib body 1151, the second rib body 1152, the third rib body 1153, the fourth rib body 1154, and the fifth rib body 1155.

[0063] As Figure 5 shown, the first rib body 1151, the second rib body 1152, the third rib body 1153, and a part of the bottom wall body 1131 enclose to form the first chamber 1101. The first rib body 1151 and the second rib body 1152 are arranged in the X-axis direction (the vehicle length direction), and the third rib body 1153 is located between the beam top wall 111 and the bottom wall body 1131, that is, the beam top wall 111, the third rib body 1153, and the bottom wall body 1131 are arranged in the Z-axis direction (the vehicle height direction).

[0064] As Figure 5 shown, the first beam side wall 112, a part of the bottom wall body 113, the first rib body 1151, and the fourth rib body 1154 enclose to form the second chamber 1102; the second beam side wall 112, a part of the bottom wall body 1131, the second rib body 1152, and the fifth rib body 1155 enclose to form the third chamber 1103; the third rib body 1153, the fourth rib body 1154, the fifth rib body 1155, and the beam top wall 111 enclose to form the fourth chamber 1104.

[0065] Among them, one end of the fourth reinforcement 1154 is connected to the connection between the first reinforcement 1151 and the third reinforcement 1153, and the other end of the fourth reinforcement 1154 is connected to the connection between the first beam side wall 112 and the beam top wall 111; one end of the fifth reinforcement 1155 is connected to the connection between the second reinforcement 1152 and the third reinforcement 1153, and the other end of the fifth reinforcement 1155 is connected to the connection between the second beam side wall 112 and the beam top wall 111.

[0066] In the illustrated example, the cross-section of the first chamber 1101 is approximately rectangular, while the cross-sections of the second chamber 1102, the third chamber 1103, and the fourth chamber 1104 are all approximately trapezoidal. The corners of each chamber are rounded to avoid stress concentration at the corners.

[0067] In the illustrated example, the cross-section of the cavity structure formed between the bottom wall body 1131 of the beam bottom wall 113 and the floor body 20 is approximately trapezoidal.

[0068] Generally speaking, chamber structures with a quadrilateral cross-section have better bending resistance and crush resistance. Figure 4 and Figure 5 The illustration shown is merely illustrative. In practical applications, the cross-sectional shape of each chamber can be determined as needed through experiments or simulations, and may be approximately triangular or rhomboid.

[0069] In some embodiments, the cross-sectional shape of the reinforcing beam 12 disposed in the first chamber 1101 is consistent with the cross-sectional shape of the first chamber 1101. In the illustrated example, the cross-sectional shape of the reinforcing beam 12 is also rectangular; in other words, the reinforcing beam 12 is a square tubular structure.

[0070] Besides the specific example shown in the figure, in other embodiments, the main body 11 of the beam can also have other structural forms. For example, based on the figure shown, another rib can be connected between the first beam sidewall 112 and the first rib 1151, so that two second chambers are formed between the beam sidewall 112 and the first chamber 1101; or, for example, based on the figure shown, another rib can be connected between the beam top wall 111 and the third rib 1153, so that two fourth chambers are formed between the beam top wall 111 and the first chamber 1101.

[0071] In practice, the main body 11 of the crossbeam is an aluminum extrusion molded part, meaning that the main body 11 of the crossbeam can be integrally formed from aluminum profiles through extrusion. The cross-sectional shape of the main body 11 of the crossbeam is relatively complex, making it easy to process using extrusion molding. Furthermore, the extrusion process has a positive impact on the mechanical properties of the aluminum material, and it also allows for the adjustment of the thickness of each component of the main body 11 according to application needs. For example, the thickness of the top wall 111, the side wall 112, and the bottom wall 113 can be easily adjusted, as can the thickness of the aforementioned five ribs. The main body 11 of the crossbeam can achieve good structural strength and rigidity by adjusting the wall thickness of different components. At the same time, using aluminum for the main body 11 of the crossbeam helps meet the development requirements of lightweight automotive bodies.

[0072] In addition, using extrusion molding to manufacture the main body of the crossbeam 11 helps to reduce the investment cost of production equipment.

[0073] In practice, the reinforcing beam 12 is a roll-formed steel pipe. The roll-forming method used for the reinforcing beam 12 offers advantages such as high forming precision, high production efficiency, and low cost.

[0074] In actual operation, steel plates can be rolled to form a tubular structure, and the butt joint 121 can be welded to finally form a circumferentially closed tubular structure.

[0075] In application, the aluminum crossbeam body 11 and the steel reinforcing beam 12 work together to both reduce the vehicle weight and meet the bending performance requirements of the seat crossbeam assembly 10.

[0076] For example, the steel used for the reinforcing beam 12 can be 2000MPa ultra-high strength steel, which can significantly improve the moment of inertia of the reinforcing beam 12 section and increase its own stiffness. Under frontal impact, this gives the seat crossbeam assembly 10 good bending resistance, and under side impact, it gives the seat crossbeam assembly 10 good crush resistance.

[0077] In one embodiment, after the crossbeam body 11 and the reinforcing beam 12 are respectively processed and formed, the reinforcing beam 12 is inserted into the first chamber 1101 of the crossbeam body 11, and then the beam wall of the reinforcing beam 12 near the bottom wall body 1131 and the bottom wall body 1131 are fixedly connected.

[0078] In practice, the connection between the reinforcing beam 12 and the main body of the crossbeam 11 can be made by using the pop rivet 01, which is convenient to operate and easy to implement.

[0079] During operation, before inserting the reinforcing beam 12 into the crossbeam body 11, a connecting hole adapted to the pop rivet can be formed on the reinforcing beam 12 and the crossbeam body 11 by laser cutting. Figure 4The diagram illustrates, for example, the connection position of the pop rivet 01 on the reinforcing beam 12 and the crossbeam body 11.

[0080] Please refer to this again. Figures 1 to 3 In one embodiment, the bottom wall 113 of the crossbeam body 11 has mounting holes 116 for mounting a battery pack (not shown in the figure). Thus, when the seat crossbeam assembly 10 is applied to an electric vehicle, the crossbeam body 11 also serves as a component for mounting the battery pack. The mounting points of the battery pack are arranged on the crossbeam body 11, giving the mounting points better strength and rigidity. In the event of a collision, the seat crossbeam assembly 10 can withstand greater forces, thereby enabling the floor assembly integrating the seat crossbeam assembly 10 to withstand greater impacts, thus providing excellent protection for the battery pack mounted below the floor assembly.

[0081] In specific implementation, to facilitate the installation of the battery pack, both the main beam 11 and the reinforcing beam 12 have through holes 117 that communicate with the mounting holes 116. The through holes 117 are used for the passage of fasteners for installing the battery pack. It can be understood that the diameter of the through holes 117 is larger than the diameter of the mounting holes 116, which can be combined with... Figures 1 to 3 as well as Figure 5 understand.

[0082] As illustrated, to facilitate the installation of the battery pack fasteners, the fasteners pass downwards from the top of the seat crossbeam assembly 10 to achieve the installation of the battery pack and the bottom wall 113 of the beam. The top and bottom walls of the reinforcing beam 12, the third rib 1153, and the top wall 111 of the crossbeam body 11 all have through holes 117 corresponding to the positions of the mounting holes 116.

[0083] Meanwhile, since the battery pack is located below the floor body 20, the floor body 20 is also provided with through holes for fasteners to pass through.

[0084] In the illustrated example, the main body 11 of the crossbeam has four mounting holes 116 for installing the battery pack, and four sets of through holes 117 corresponding to the mounting holes 116. In practical applications, the number and arrangement of the mounting holes 116 can be determined according to the installation requirements of the battery pack, and are not limited to those shown in the figure.

[0085] Please refer to this again. Figures 1 to 3 In some embodiments, the seat beam assembly 10 also includes at least two bracket groups, each bracket group for mounting a seat, and each bracket group includes multiple mounting brackets 131, which are fixedly connected to the beam body 11.

[0086] Generally, a car has two seats in the same row. The diagram illustrates this by showing a seat crossbeam assembly 10 comprising two support groups, each of which includes two mounting brackets 131. It is understood that in other embodiments, the number of support groups and the number of mounting brackets 131 in each support group can be adjusted as needed.

[0087] For ease of description, the two bracket assemblies will be referred to as the first bracket assembly 13A and the second bracket assembly 13B. The first bracket assembly 13A is used to install one seat, and the second bracket assembly 13B is used to install another seat, meaning that two seats can be installed on the seat crossbeam assembly 10 at the same time.

[0088] After adopting the above solution, the seat crossbeam assembly 10 corresponding to the same row of seats is an integral structure. Compared with the traditional segmented structure, it can reduce the number of connection points between the seat crossbeam assembly 10 and the vehicle body. At the same time, the integral structure has better structural strength and rigidity than the segmented structure.

[0089] For example, the mounting bracket 131 is formed by die casting, which has a high material utilization rate and production efficiency, and is conducive to cost saving.

[0090] In practice, the mounting bracket 131 and the crossbeam body 11 are fixed together using flow drill screws (FDS). The FDS process is a cold forming process that involves hot deformation of the connecting parts through high-speed rotation followed by tapping and riveting. This method facilitates the connection between the mounting bracket 131 and the crossbeam body 11.

[0091] Please refer to this as well. Figure 6 and Figure 7 , Figure 6 for Figure 1 A partial structural diagram of the middle seat crossbeam assembly at the location of the end joint. Figure 7 for Figure 1 A schematic diagram of the mounting bracket.

[0092] In one embodiment, the mounting bracket 131 is provided with a connecting plate for connecting to the crossbeam body 11.

[0093] Mounting bracket 131 includes bracket body 1311 and multiple connecting plates located at the bottom of bracket body 1311.

[0094] The main body of the support 1311 is roughly block-shaped and has four peripheral walls. The bottom of the two peripheral walls of the main body of the support 1311 in the Y-axis direction folds outward to form two first connecting plates 1312, and the bottom of the two peripheral walls of the main body of the support 1311 in the X-axis direction extends downward to form two second connecting plates 1313.

[0095] Both first connecting plates 1312 are fixedly connected to the top wall 111 of the crossbeam body 11 using flow drill screws 02, and both second connecting plates 1313 are fixedly connected to the two side walls 112 of the crossbeam body 11 using flow drill screws 02.

[0096] In one embodiment, a reinforcing rib 1314 may be provided between the first connecting plate 1312 and the peripheral wall of the corresponding bracket body 1311 to improve the structural strength of the mounting bracket 131 itself.

[0097] In other embodiments, the mounting bracket 131 and the crossbeam body 11 can also be fixedly connected by other means, such as welding.

[0098] Please refer to this again. Figures 1 to 3 In some embodiments, the seat crossbeam assembly 10 further includes two end joints 14, which are fixedly connected to both ends of the crossbeam body 11 in its length direction (Y-axis direction). This facilitates the connection of the seat crossbeam assembly 10 to the sill beam of the vehicle body.

[0099] The end connector 14 is set separately from the crossbeam body 11 and then fixedly connected, which makes it easy to adapt the seat crossbeam assembly 10 to the door sill beams of different models.

[0100] Please combine them together Figure 6 and Figure 8 ,in, Figure 8 for Figure 1 A schematic diagram of the middle end connector.

[0101] In one embodiment, the end connector 14 includes a connector main board 141, which extends generally in the Z-axis direction. The connector main board 141 has a first flange 142, a second flange 143, and a third flange 144 on the side facing the beam body 11. The first flange 142 is fixedly connected to the beam top wall 111 of the beam body 11, the second flange 143 is fixedly connected to the beam side wall 112 of the beam body 11, and the third flange 143 is fixedly connected to the extension wall portion 1132 of the beam body 11.

[0102] To ensure the stability and reliability of the fixation between the end joint 14 and the main body of the crossbeam 11, two second flanges 143 and two third flanges 144 are provided. It can be understood that the two second flanges 143 are arranged opposite to each other and are fixedly connected to the two beam side walls 112 respectively, and the two third flanges 144 are fixedly connected to the two extended wall portions 1132 respectively.

[0103] In practice, the connection between the end connector 14 and the main body of the crossbeam 11 can also be achieved using the flow drill screw 02. This method is convenient to use.

[0104] The connector main plate 141 of the end connector 14 has a fourth flange 145 on the side facing away from the crossbeam body 11. This fourth flange 145 can be used for fixed connection with the sill beam of the vehicle body. In application, the fourth flange 145 can overlap the top wall of the sill beam and be fixed to the sill beam. This structural form makes the end connector 14 easy to adapt to sill beams with different structural forms, and has strong versatility.

[0105] The end joint 14 is a one-piece molded part, which helps to improve the connection strength between the main body of the crossbeam 11 and the sill beam.

[0106] For example, the end connector 14 may be formed by cold stamping.

[0107] In Adoption Figures 1 to 8 In a specific example of the seat crossbeam assembly 10 structure shown, by comparison, the seat crossbeam assembly 10 using this structure can achieve advantages such as a 13% reduction in the number of parts, a 17% reduction in connection cost, and a 25% reduction in weight.

[0108] This application embodiment also provides a floor assembly, which includes a floor body 20, a sill beam, and a seat crossbeam assembly 10 as described in the previous embodiment. The bottom of the seat crossbeam assembly 10, i.e., the bottom wall 113 of the crossbeam body 11, is fixedly connected to the floor body 20, and the end of the seat crossbeam assembly 10 in the length direction is fixedly connected to the sill beam.

[0109] Specifically, the main body 11 of the beam is connected to the floor body 20 through two extended wall portions 1132 of the bottom wall 113 of the beam. (See reference...) Figure 4 Understandably, the extension wall 1132 and the floor body 20 can be joined using an SPR (Self-Piercing Rivet) connection process. Figure 4 The location of SPR connection point 03 is shown in the figure.

[0110] Because the aforementioned seat beam assembly 10 has good bending and crush resistance, the floor assembly integrating the seat beam assembly 10 also has good mechanical properties and can effectively resist collision impact.

[0111] This application also provides a vehicle, which includes a battery pack, and further includes the seat crossbeam assembly 10 of the aforementioned embodiments or the floor assembly of the aforementioned embodiments. The battery pack is located below the crossbeam body 11, and the battery pack is fixedly connected to the crossbeam body 11.

[0112] Due to the aforementioned seat crossbeam assembly 10 or floor assembly, when the vehicle is subjected to a frontal collision, the seat crossbeam assembly 10 can effectively transmit the collision force, exhibiting good bending and crush resistance, thus preventing the vehicle body from being crushed. When the vehicle is subjected to a side collision, the aforementioned structural design of the seat crossbeam assembly 10 can effectively absorb the collision energy, providing effective protection for the battery pack. For example, it can prevent the deformation of the liquid cooling plate of the battery pack caused by the deformation of the sill beam.

[0113] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A seat cross-member assembly characterized by, The seat cross beam assembly comprises: a cross beam body having a plurality of chambers extending along the length direction of the cross beam body, the chamber walls forming the chambers being circumferentially closed; a reinforcing beam in the form of a circumferentially closed tubular structure; at least one of the chambers is provided with the reinforcing beam, and the reinforcing beam is fixedly connected with the cross beam body.

2. The seat cross beam assembly of claim 1, wherein, The cross beam body comprises a beam top wall and two beam side walls, and the two beam side walls are respectively arranged on the two sides of the beam top wall; the plurality of chambers comprises a first chamber, at least one second chamber and at least one third chamber, the second chamber is located between the first chamber and one of the beam side walls, and the third chamber is located between the first chamber and the other beam side wall; the first chamber is provided with the reinforcing beam.

3. The seat cross-car beam assembly of claim 2, wherein, The plurality of chambers further comprises at least one fourth chamber, and the fourth chamber is located between the first chamber and the beam top wall.

4. The seat cross-car beam assembly of claim 2, wherein, The cross beam body further comprises a beam bottom wall, the bottom edges of the two beam side walls are connected with the beam bottom wall, and the beam bottom wall comprises a bottom wall body located between the two beam side walls, and the bottom wall body is recessed towards the direction of the beam top wall to form a recess with an opening facing away from the beam top wall.

5. The seat cross-car beam assembly of claim 3, wherein, The cross section of the first chamber is in the shape of a rectangle, and the cross sections of the second chamber, the third chamber and the fourth chamber are all in the shape of a trapezoid.

6. The seat track assembly of any of claims 1-5, wherein, The beam bottom wall of the cross beam body has a mounting hole for mounting a battery pack, and the cross beam body and the reinforcing beam both have a through hole penetrating the mounting hole, and the through hole is used for passing a fastener for mounting the battery pack.

7. The seat track assembly of any of claims 1-5, wherein, The seat cross beam assembly further comprises at least two support groups for mounting a seat, and each support group comprises a plurality of mounting supports fixedly connected with the cross beam body, and each mounting support comprises a support body, two first connecting plates are formed by outwardly folding the bottoms of the two circumferential walls of the support body in the length direction of the cross beam body, and two second connecting plates are formed by outwardly folding the bottoms of the two circumferential walls of the support body in the width direction of the cross beam body, the first connecting plates are fixedly connected with the beam top wall of the cross beam body, and the second connecting plates are fixedly connected with the beam side walls of the cross beam body.

8. The seat track assembly of any of claims 1-5, wherein, The cross beam body comprises a beam top wall, a beam bottom wall and two beam side walls, the beam bottom wall comprises a bottom wall body connecting the two beam side walls and an extension wall portion extending outwardly from the beam side walls; The seat cross beam assembly further comprises two end connectors fixedly connected with the two ends of the cross beam body in the length direction, and each end connector comprises a first flange, a second flange and a third flange facing the cross beam body, the first flange is fixedly connected with the beam top wall, the second flange is fixedly connected with the beam side wall, and the third flange is fixedly connected with the extension wall portion; and each end connector further comprises a fourth flange facing away from the cross beam body, and the fourth flange is used for being fixedly connected with a rocker beam.

9. The seat track assembly of any of claims 1-5, wherein, The cross beam body is an integrally formed structure.

10. A floor assembly characterized by, The seat cross beam assembly is fixedly connected with the floor body at the bottom and fixedly connected with the rocker beam at the end.

11. An automobile characterized by The battery pack is located below the cross beam body, and the battery pack is fixedly connected with the cross beam body. The battery pack is located below the cross beam body, and the battery pack is fixedly connected with the cross beam body.

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