Floor cross member assembly and vehicle

Abstract

The utility model discloses a floor crossbeam assembly and vehicle relates to vehicle floor crossbeam technical field, floor crossbeam assembly includes: first crossbeam and second crossbeam, both ends of first crossbeam verticality are connected to the floor, and the middle part of first crossbeam verticality is spaced apart with the floor, second crossbeam is connected in the upper of first crossbeam, and both ends of second crossbeam verticality are connected to first crossbeam, and the middle part of second crossbeam verticality is connected with the middle part of first crossbeam verticality, and first crossbeam is spaced apart with the at least part of second crossbeam. The utility model embodiment through the floor crossbeam assembly is set to the mode of including first crossbeam and second crossbeam connection, improves the overall structural strength, and first crossbeam is connected with the floor, and both ends of second crossbeam and first crossbeam are connected, and first crossbeam and second crossbeam are connected along the middle part position of vehicle verticality, improve the structure stability of floor crossbeam assembly, also improve the anti -side crash performance and the strength of bending -resistant compression.

Description

Technical Field

[0001] This utility model relates to the field of vehicle floor crossbeam technology, and in particular to a floor crossbeam assembly and a vehicle. Background Technology

[0002] Currently, vehicles have become one of the important tools for people to get around, and users are paying more attention to issues such as vehicle safety and comfort. For example, when a vehicle is involved in a side collision, severe deformation of the door sill can cause the lateral passenger compartment space to be squeezed, affecting passenger safety. The vehicle's floor beams can be used as seat mounting parts, and at the same time, they also play a role in resisting side collision forces.

[0003] However, the overall bending and compressive strength of the floor beams in the existing technology is relatively weak, and there is room for improvement. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a floor beam assembly. By configuring the floor beam assembly to include a first beam and a second beam connected together, the overall structural strength is improved. The first beam is connected to the floor, and both ends of the second beam are connected to the first beam. Furthermore, the first and second beams are connected at the midpoint along the longitudinal direction of the vehicle, thus improving the structural stability of the floor beam assembly, as well as its resistance to side impacts and its bending and compressive strength.

[0005] A floor beam assembly according to an embodiment of the present invention includes: a first beam and a second beam, wherein both ends of the first beam in the longitudinal direction are connected to the floor, and the middle part of the first beam in the longitudinal direction is spaced apart from the floor; the second beam is connected above the first beam, and both ends of the second beam in the longitudinal direction are connected to the first beam, the middle part of the second beam in the longitudinal direction is connected to the middle part of the first beam in the longitudinal direction, and at least a portion of the first beam and the second beam are spaced apart.

[0006] According to the embodiment of the present invention, the floor beam assembly firstly improves the overall structural strength by configuring the floor beam assembly to include a first beam and a second beam connected together. Furthermore, the two ends of the first beam are connected to the floor, and the two ends of the second beam are connected to the first beam. The middle portions of the first and second beams are connected, thereby improving the stress balance of the connection. Simultaneously, at least a portion of the first and second beams are spaced apart; that is, the portion between the middle connection of the first and second beams and one end connection forms a second cavity, and the portion between the middle connection of the first and second beams and another end connection forms another second cavity. A first cavity is formed between the first beam and the floor. The first cavity can achieve weight reduction and energy absorption. The integrity between the beam assembly and the floor mainly relies on the connection between the middle portions of the first and second beams. While ensuring uniform stress distribution, it avoids the situation where uneven stress distribution between the two second cavities leads to the weaker second cavity deforming. Therefore, when a vehicle is subjected to a side collision, the bending and compressive strength of the floor beam assembly is improved.

[0007] According to the floor beam assembly of this utility model embodiment, the middle part of the first beam in the longitudinal direction is the first top section, the middle part of the second beam in the longitudinal direction is the second top section, the first top section and the second top section are connected, and the length of the second top section in the longitudinal direction of the vehicle is greater than the length of the first top section.

[0008] According to the floor beam assembly of this utility model embodiment, the first beam further includes two inclined sections and two first connecting sections. The two inclined sections are respectively connected to both sides of the first top section along the longitudinal direction of the vehicle and inclined downwards. The two first connecting sections are respectively connected to both sides of the two inclined sections along the longitudinal direction of the vehicle and connected to the floor.

[0009] According to the floor beam assembly of this utility model embodiment, the second beam further includes two side sections and two second connecting sections. The two side sections are connected to both sides of the second top section along the longitudinal direction of the vehicle and extend toward the floor. The two side sections are respectively connected to two second connecting sections along the longitudinal direction of the vehicle. The two second connecting sections are respectively connected to both sides of the two side sections along the longitudinal direction of the vehicle. The two second connecting sections are connected one-to-one above the two first connecting sections.

[0010] According to the floor beam assembly of this utility model embodiment, the first connecting section includes a first connecting area and a second connecting area. The first connecting area and the second connecting area are distributed along the longitudinal direction of the vehicle from away from the inclined section to close to the inclined section. The first connecting area is connected to the floor, and a gap is left between the second connecting area and the floor.

[0011] According to the floor beam assembly of this utility model embodiment, the first connecting segment and the inclined segment are connected by an arc-shaped transition, and the inclined segment and the first top segment are connected by an arc-shaped transition.

[0012] According to the floor beam assembly of this utility model embodiment, the side section and the second connecting section are connected by an arc-shaped transition, and the side section and the second top section are connected by an arc-shaped transition.

[0013] According to an embodiment of the present invention, a seat mounting point is provided at the connection between the first top section and the second top section of the floor beam assembly.

[0014] According to the floor beam assembly of this utility model embodiment, the connection position between the first top segment and the second top segment is a first connection position, and a plurality of first connection positions are arranged at intervals along the vehicle's transverse direction, with a distance of 30-60mm between two adjacent first connection positions; and / or, the position where the first connection segment, the second connection segment, and the floor are sequentially connected is a second connection position, and a plurality of second connection positions are arranged at intervals along the vehicle's transverse direction, with a distance of 30-60mm between two adjacent second connection positions.

[0015] This utility model embodiment also discloses a vehicle including the above-described floor beam assembly.

[0016] The advantages of the vehicle described above compared to existing technologies are the same as those of the floor beam assembly described above compared to existing technologies, and will not be elaborated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of a section of the floor beam assembly according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the Y-direction cross-section of the floor beam assembly according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the welding position of the Y-direction cross-section of the floor beam assembly according to an embodiment of this utility model; Figure 4 This is a schematic diagram showing the Y-direction cross-section of the floor beam assembly according to an embodiment of the present invention, illustrating the arc transition points of the first and second beams.

[0019] Figure label: Floor beam assembly 100, floor 101, First crossbeam 1, first top section 11, inclined section 12, first connecting section 13, first connecting area 131, second connecting area 132, first arc transition 14, second arc transition 15, second crossbeam 2, second top section 21, second top middle section 211, second top outer section 212, side section 22, second connecting section 23, third arc transition 24, fourth arc transition 25, first cavity 3, second cavity 4, gap 5, first connecting position 6, second connecting position 7. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0023] The following is for reference. Figures 1-4 According to an embodiment of the present utility model, a floor beam assembly 100 is described. By configuring the floor beam assembly 100 to include a first beam 1 and a second beam 2 connected together, the overall structural strength is improved. In addition, the two ends of the first beam 1 are connected to the floor 101, and the two ends of the second beam 2 are connected to the first beam 1. The middle part of the first beam 1 and the middle part of the second beam 2 are connected, thereby improving the stress balance of the connection.

[0024] Meanwhile, at least a portion of the first crossbeam 1 and the second crossbeam 2 are spaced apart. That is, the portion between the middle connection of the first crossbeam 1 and the second crossbeam 2 and one end connection forms a second cavity 4, and the portion between the middle connection of the first crossbeam 1 and the other end connection forms another second cavity 4. A first cavity 3 is formed between the first crossbeam 1 and the floor 101. The first cavity 3 can achieve the functions of weight reduction and energy absorption. The integrity between the floor crossbeam assembly 100 and the floor 101 mainly relies on the middle connection of the first crossbeam 1 and the middle connection of the second crossbeam 2. While the force is evenly distributed, it avoids the situation where the two second cavities 4 are not evenly distributed and one of the second cavities 4 is weak and deformed. Thus, when the vehicle is subjected to a side collision, the bending and compressive strength of the floor crossbeam assembly 100 is improved.

[0025] like Figure 1-4 As shown, a floor beam assembly 100 according to an embodiment of the present invention includes: a first beam 1 and a second beam 2.

[0026] Wherein, both ends of the first crossbeam 1 in the longitudinal direction are connected to the floor 101, and the middle part of the first crossbeam 1 in the longitudinal direction is spaced apart from the floor 101; the second crossbeam 2 is connected above the first crossbeam 1, and both ends of the second crossbeam 2 in the longitudinal direction are connected to the first crossbeam 1, the middle part of the second crossbeam 2 in the longitudinal direction is connected to the middle part of the first crossbeam 1 in the longitudinal direction, and the first crossbeam 1 and the second crossbeam 2 are at least partially spaced apart.

[0027] In practice, the core function of the vehicle floor crossbeam assembly 100 is to bear the weight of the vehicle body, transmit and distribute external forces, and provide structural support for the floor assembly. It is a key component for maintaining the rigidity and safety of the vehicle body bottom.

[0028] Reference Figure 1 and Figure 2 As shown, the first crossbeam 1 is externally connected to the second crossbeam 2. The two ends of the first crossbeam 1 along the longitudinal direction of the vehicle can be welded to the floor 101. The floor 101 is a cold-rolled steel sheet. The core advantages of cold-rolled steel sheet are high dimensional accuracy, good surface finish, and significantly improved material hardness and strength after cold rolling. It can have good mechanical properties without additional heat treatment and has a relatively uniform thickness.

[0029] Both the first crossbeam 1 and the second crossbeam 2 can be made of hot-formed or rolled steel plates. The core advantage of hot-formed steel plates is their extremely high strength, which can significantly improve structural safety while reducing the weight of the vehicle body. Rolled steel plates, on the other hand, have the core advantages of high forming precision and fast production efficiency, making them suitable for mass production of standardized parts with complex cross-sections. Furthermore, both the first crossbeam 1 and the second crossbeam 2 can be made of high-strength steel. High-strength steel materials can be both high in strength and lightweight, and they exceed the load-bearing capacity, impact resistance, and deformation resistance of ordinary steel. Moreover, the tensile strength of high-strength steel is generally above 600MPa, and some hot-formed high-strength steel exceeds 1500MPa. It has strong impact resistance and fatigue resistance, and is not easy to break or deform under collision, heavy load, and other scenarios. This results in high weld strength at the connection between the first crossbeam 1 and the second crossbeam 2, and better stability against axial compression failure.

[0030] Specifically, the middle of the first crossbeam 1 in the longitudinal direction is spaced apart from the floor 101, and the two ends of the first crossbeam 1 in the longitudinal direction are connected to the floor 101, thereby forming a first cavity 3 between the first crossbeam 1 and the floor 101, achieving the effect of reducing weight while absorbing energy; at the same time, the middle of the second crossbeam 2 is connected to the middle of the first crossbeam 1, and the two ends of the second crossbeam 2 are connected to the first crossbeam 1, and at least part of the first crossbeam 1 and the second crossbeam 2 are spaced apart, thereby forming a second cavity 4 between the middle connection of the first crossbeam 1 and the end connection of the first crossbeam 1 and the second crossbeam 2. That is, after the entire first crossbeam 1 and the second crossbeam 2 are connected, two second cavities 4 are formed, thereby ensuring uniform force distribution and improving the bending strength of the floor crossbeam assembly 100 under side impact.

[0031] Furthermore, since the first crossbeam 1 and the second crossbeam 2 are made of high-strength steel, their welding strength is significantly increased. The central connection between the first crossbeam 1 and the second crossbeam 2 allows the second cavity 4 formed by them to also provide impact and bending resistance. CAE (Computer-Aided Engineering) simulations have verified that, even with slight weld detachment between the first crossbeam 1 and the floor 101 in a side pole impact scenario, the first crossbeam 1 and the second crossbeam 2 still provide sufficient resistance, significantly improving vehicle intrusion and dummy posture scores. Therefore, by designing the first crossbeam 1 and the second crossbeam 2 with a central connection and both ends of the second crossbeam 2 connected to the first crossbeam 1, the bending and compressive strength of the vehicle during a side impact is improved.

[0032] In addition, the first crossbeam 1 and the second crossbeam 2 are welded together using high-strength steel, which improves space utilization and saves 50% of the longitudinal foot space of the vehicle under the same weight and performance, providing effective support for the goal of lightweighting the whole vehicle and the need for a compact layout.

[0033] In some embodiments, the middle part of the first crossbeam 1 in the longitudinal direction is the first top section 11, the middle part of the second crossbeam 2 in the longitudinal direction is the second top section 21, the first top section 11 and the second top section 21 are connected, and the length of the second top section 21 in the longitudinal direction of the vehicle is greater than the length of the first top section 11.

[0034] First, by making the length of the second top section 21 along the vehicle longitudinal direction greater than the length of the first top section 11 along the vehicle longitudinal direction, and by making the second top section 21 include a second top middle section 211 and a second top outer section 212, with the second top outer sections 212 on both sides connected to the second top middle section 211 along the vehicle longitudinal direction, the second top middle section 211 can be connected to the first top section 11. Thus, there is space between the second top outer section 212 and the first crossbeam 1. When subjected to a collision, the force can be avoided from being concentrated at the connection position between the second crossbeam 2 and the first crossbeam 1, and part of the force can be dispersed to the second top outer section 212, thereby reducing the deformation risk of the entire floor crossbeam assembly 100.

[0035] Furthermore, the first top segment 11 and the second top segment 21 are connected at the middle position along the longitudinal direction of the vehicle. That is, after the first top segment 11 and the second top segment 21 are connected, the distance between the second top outer segments 212 on both sides of the second top middle segment 211 is the same. This makes the difference in cross-sectional size between the two second cavities 4 smaller, avoiding the problem that when the vehicle is hit by a collision, one of the second cavities 4 will have weaker impact resistance and deform due to a large difference in cross-sectional area between the two second cavities 4. In some embodiments, the first crossbeam 1 further includes two inclined sections 12 and two first connecting sections 13. The two inclined sections 12 are respectively connected to both sides of the first top section 11 along the longitudinal direction of the vehicle and are inclined downward. The two first connecting sections 13 are respectively connected to both sides of the two inclined sections 12 along the longitudinal direction of the vehicle and are connected to the floor 101.

[0036] In other words, the first top section 11 is provided with inclined sections 12 extending towards the floor 101 on both sides along the longitudinal direction of the vehicle. At the same time, each inclined section 12 is connected to a first connecting section 13 on the side away from the first top section 11 along the longitudinal direction of the vehicle. The first connecting section 13 can be welded to the floor 101, and the first crossbeam 1 can form a first cavity 3 between itself and the floor 101. By providing two inclined sections 12 for the first crossbeam 1, stress concentration can be avoided.

[0037] In other words, the structure of the first crossbeam 1 is similar to a Z-shaped structure. The core advantage of the Z-shaped crossbeam 1 is that while being lightweight, it can significantly improve bending and torsional stiffness, achieving stronger structural load-bearing capacity with less material. The first cavity 3 formed between the Z-shaped crossbeam 1 and the floor 101 can achieve weight reduction, and the first crossbeam 1 can also be mass-produced. Furthermore, the two first connecting sections 13 formed therein are convenient for welding to the floor 101.

[0038] In some embodiments, the second crossbeam 2 further includes two side sections 22 and two second connecting sections 23. The two side sections 22 are connected to both sides of the second top section 21 along the longitudinal direction of the vehicle and extend toward the floor 101. The two side sections 22 are respectively connected to two second connecting sections 23 along the longitudinal direction of the vehicle. The two second connecting sections 23 are respectively connected to both sides of the two side sections 22 along the longitudinal direction of the vehicle. The two second connecting sections 23 are connected one-to-one above the two first connecting sections 13.

[0039] In other words, the cross-sectional structure of the second crossbeam 2 can also be set to a similar Z-shaped structure, so that it can be connected to the corresponding position of the first crossbeam 1 with a similar Z-shaped structure, such as the first connecting segment 13 and the second connecting segment 23, and the first top segment 11 and the second top segment 21 are connected. At the same time, a part of the second top segment 21 and the inclined segment 12 of the first crossbeam 1, the side segment 22 of the second crossbeam 2, and the connection between the first connecting segment 13 and the second connecting segment 23 form a second cavity 4. Combined with the first cavity 3 formed between the first crossbeam 1 and the floor 101, the first cavity 3 and the second cavity 4 can not only reduce weight, but also better absorb energy when the floor crossbeam assembly 100 is impacted.

[0040] Meanwhile, the Z-shaped structure of the second crossbeam 2 is connected to the outside of the Z-shaped structure of the first crossbeam 1, which can save space along the longitudinal direction of the floor crossbeam assembly 100 while meeting the strength requirements. Assuming that the weld point between the first connecting section 13 and the floor 101 is torn off, the connection strength between the first top section 11 and the second top section 21 of high-strength steel is high and the stability is better due to the design of the Z-shaped structure of the first crossbeam 1 and the second crossbeam 2, which can reduce the risk of side impact deformation and improve the structural robustness.

[0041] In some embodiments, the first connecting segment 13 includes a first connecting region 131 and a second connecting region 132, which are distributed along the longitudinal direction of the vehicle from away from the inclined segment 12 to near the inclined segment 12. The first connecting region 131 is connected to the floor 101, and a gap 5 is left between the second connecting region 132 and the floor 101.

[0042] Reference Figure 3 As shown, the first connecting area 131 is connected to the floor 101, and the second connecting section 23 of the second crossbeam 2 is connected to the top of the first connecting area 131. At the same time, a gap 5 is left between the second connecting area 132 and the floor 101, which can form a quadrilateral-like structure, such as a trapezoidal structure, between the second connecting area 132, the inclined section 12, the side section 22 and the second top outer section 212. That is, the quadrilateral is arranged to form the second cavity 4, so stress concentration can be avoided when subjected to side collision. For example, the force on the bottom of the second cavity 4 and the force on the upper part of the second cavity 4 are slightly offset along the longitudinal direction of the vehicle, thereby dispersing the force and improving the bending resistance and side impact resistance of the floor crossbeam assembly 100.

[0043] Furthermore, a gap 5 is left between the second connecting area 132 of the first connecting section 13 and the floor 101. This gap 5 allows for a certain process gap 5 between the transition between the first connecting section 13 and the inclined section 12 and the floor 101, which can avoid abnormal noise caused by vibration.

[0044] In some embodiments, the first connecting segment 13 and the inclined segment 12 are connected by an arc-shaped transition, and the inclined segment 12 and the first top segment 11 are connected by an arc-shaped transition.

[0045] In practice, refer to Figure 4 As shown, there is a first arc-shaped transition 14 between the first connecting section 13 and the inclined section 12 of the first crossbeam 1, and a second arc-shaped transition 15 between the inclined section 12 and the first top section 11. By setting the first arc-shaped transition 14 and the second arc-shaped transition 15, and by ensuring that the first arc-shaped transition 14 and the second arc-shaped transition 15 meet the requirements of the sheet metal forming process, the problem of cracks or fractures caused by stress concentration can be avoided. For example, when a vehicle is subjected to a side collision, the force can be distributed along the first arc-shaped transition 14 to the first connecting section 13 and the inclined section 12. At the same time, the force can also be distributed along the second arc-shaped transition 15 to the inclined section 12 and the first top section 11, thereby making the force more uniform and reducing the risk of local deformation.

[0046] In some embodiments, the side segment 22 and the second connecting segment 23 are connected by an arc-shaped transition, and the side segment 22 and the second top segment 21 are connected by an arc-shaped transition.

[0047] Specifically, refer to Figure 4As shown, there is a third arc-shaped transition 24 between the side section 22 and the second connecting section 23, and a fourth arc-shaped transition 25 between the side section 22 and the second top section 21. By setting the third arc-shaped transition 24 and the fourth arc-shaped transition 25, the problem of cracks or fractures caused by stress concentration can be avoided. Moreover, the two opposite corners of the quadrilateral formed between the second connecting area 132 and the inclined section 12, the second top outer section 212, and the side section 22 can be arc-shaped, so that the second cavity 4 can absorb energy while dispersing stress and improving the fatigue resistance and fracture resistance of the floor beam assembly 100. Since the second top middle section 211 is connected to the first top section 11, and the first connecting section 13 is connected to the second connecting section 23, the strength of the other two opposite corners of the quadrilateral is higher. It is equivalent to strengthening at both of these positions. That is to say, setting two opposite corners of the quadrilateral as arc corners and strengthening the other two opposite corners can improve the stability of the quadrilateral structure when subjected to collision forces.

[0048] In addition, the floor beam assembly 100 can be used to connect seats. When the floor beam assembly 100 is subjected to the pressure of the seat and the occupant facing the vehicle vertically downward, the vertical compressive strength of the floor beam assembly 100 can be improved by setting two first cavities 3 with similar trapezoidal structures.

[0049] In some embodiments, a seat mounting point is provided at the connection between the first top section 11 and the second top section 21. Firstly, the floor beam assembly 100 and the seat are detachably connected. For example, if the seat is connected to the floor beam assembly 100 at the connection between the first top section 11 and the second top section 21 using bolts, the strength of the connection between the first top section 11 and the second top intermediate section 211 is improved. Since both are made of high-strength steel, no additional connecting plate is needed for connection. When using bolts, mounting holes are required. Because the connection between the first top section 11 and the second top intermediate section 211 improves the strength of the connection, the requirement for mounting holes can be met. This means there is no need to arrange a seat nut backplate, saving process time and the number of parts, which is beneficial to the cycle time of automated welding lines.

[0050] In some embodiments, refer to Figure 4 As shown, the connection position between the first top segment 11 and the second top segment 21 is the first connection position 6, and multiple first connection positions 6 are arranged at intervals along the vehicle's transverse direction, with a distance of 30-60mm between two adjacent first connection positions 6; and / or, the position where the first connecting segment 13, the second connecting segment 23, and the floor 101 are connected in sequence is the second connection position 7, and multiple second connection positions 7 are arranged at intervals along the vehicle's transverse direction, with a distance of 30-60mm between two adjacent second connection positions 7.

[0051] In other words, multiple first connecting positions 6 are spaced apart along the lateral direction of the vehicle, and multiple second connecting positions 7 are also spaced apart along the lateral direction of the vehicle. For example, the distance between two adjacent first connecting positions 6 can be set to 30mm, 40mm, or 50mm, and the distance between two adjacent second connecting positions 7 can be set to 30mm, 40mm, or 50mm, thereby improving the connection strength of the floor beam assembly 100 along the lateral direction of the vehicle. It should be noted that the second connecting position 7 refers to the connection between the first connecting segment 13 of the first beam 1 and the floor 101, and the first connecting segment 13 and the second connecting segment 23 are connected, forming a multi-layer weld.

[0052] Meanwhile, the portion between two adjacent second connection positions 7 along the vehicle's transverse direction is not welded to the first connection segment 13 and the floor 101, nor is the first connection segment 13 welded to the second connection segment 23. This ensures the reliability of the connection between the entire floor beam assembly 100 and the floor 101 while saving welding steps and welding materials. Setting the distance between two adjacent first connection positions 6 and the distance between two adjacent second connection positions 7 ensures a reliable connection between the entire floor beam assembly 100 and the floor 101, as well as a reliable connection between the first beam 1 and the second beam 2, while also saving costs.

[0053] This utility model embodiment also discloses a vehicle including the aforementioned floor crossbeam assembly 100. By configuring the floor crossbeam assembly 100 to include a first crossbeam 1 and a second crossbeam 2 connected together, the overall structural strength is improved. Furthermore, both ends of the first crossbeam 1 are connected to the floor 101, and both ends of the second crossbeam 2 are connected to the first crossbeam 1. The middle portions of the first crossbeam 1 and the second crossbeam 2 are connected, thereby improving the stress balance of the connection. Simultaneously, at least a portion of the first crossbeam 1 and the second crossbeam 2 are spaced apart; that is, the portion between the middle connection of the first crossbeam 1 and the second crossbeam 2 and one end connection forms a second cavity. The portion between the middle connection of the first crossbeam 1 and the second crossbeam 2 and the other end connection forms another second cavity 4, while the first crossbeam 1 and the floor 101 form a first cavity 3. The first cavity 3 can achieve the functions of weight reduction and energy absorption. The integrity between the floor crossbeam assembly 100 and the floor 101 mainly relies on the middle connection of the first crossbeam 1 and the second crossbeam 2. While the force is evenly distributed, it avoids the situation where the two second cavities 4 are not evenly distributed and one of the second cavities 4 is weak and deformed. Thus, when the vehicle is subjected to a side collision, the bending and compressive strength of the floor crossbeam assembly 100 is improved.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A floor beam assembly (100), characterized in that, include: The first crossbeam (1) has two ends in the longitudinal direction connected to the floor (101), and the middle part in the longitudinal direction of the first crossbeam (1) is spaced apart from the floor (101); The second crossbeam (2) is connected above the first crossbeam (1), and both ends of the second crossbeam (2) in the longitudinal direction are connected to the first crossbeam (1). The middle part of the second crossbeam (2) in the longitudinal direction is connected to the middle part of the first crossbeam (1) in the longitudinal direction, and at least part of the first crossbeam (1) and the second crossbeam (2) are spaced apart.

2. The floor beam assembly (100) according to claim 1, characterized in that, The first crossbeam (1) has a first top section (11) in the middle of its longitudinal direction, and the second crossbeam (2) has a second top section (21) in the middle of its longitudinal direction. The first top section (11) and the second top section (21) are connected, and the length of the second top section (21) along the longitudinal direction of the vehicle is greater than the length of the first top section (11).

3. The floor beam assembly (100) according to claim 2, characterized in that, The first crossbeam (1) further includes two inclined sections (12) and two first connecting sections (13). The two inclined sections (12) are respectively connected to the two sides of the first top section (11) along the longitudinal direction of the vehicle and are inclined downward. The two first connecting sections (13) are respectively connected to the two inclined sections (12) along the longitudinal direction of the vehicle and are connected to the floor (101).

4. The floor beam assembly (100) according to claim 3, characterized in that, The second crossbeam (2) also includes two side sections (22) and two second connecting sections (23). The two side sections (22) are connected to the second top section (21) on both sides along the longitudinal direction of the vehicle and extend toward the floor (101). The two side sections (22) are respectively connected to two second connecting sections (23) on both sides along the longitudinal direction of the vehicle. The two second connecting sections (23) are respectively connected to the two side sections (22) on both sides along the longitudinal direction of the vehicle. The two second connecting sections (23) are connected one-to-one above the two first connecting sections (13).

5. The floor beam assembly (100) according to claim 3, characterized in that, The first connecting segment (13) includes a first connecting area (131) and a second connecting area (132). The first connecting area (131) and the second connecting area (132) are distributed along the longitudinal direction of the vehicle from away from the inclined segment (12) to close to the inclined segment (12). The first connecting area (131) is connected to the floor (101), and a gap (5) is left between the second connecting area (132) and the floor (101).

6. The floor beam assembly (100) according to claim 3, characterized in that, The first connecting segment (13) and the inclined segment (12) are connected by an arc-shaped transition, and the inclined segment (12) and the first top segment (11) are connected by an arc-shaped transition.

7. The floor beam assembly (100) according to claim 4, characterized in that, The side section (22) and the second connecting section (23) are connected by an arc-shaped transition, and the side section (22) and the second top section (21) are connected by an arc-shaped transition.

8. The floor beam assembly (100) according to claim 2, characterized in that, A seat mounting point is provided at the connection between the first top section (11) and the second top section (21).

9. The floor beam assembly (100) according to claim 4, characterized in that, The connection position between the first top segment (11) and the second top segment (21) is the first connection position (6). Multiple first connection positions (6) are arranged at intervals along the transverse direction of the vehicle. The distance between two adjacent first connection positions (6) is 30-60mm. And / or, the positions where the first connecting segment (13), the second connecting segment (23), and the floor (101) are connected in sequence are the second connecting positions (7), and multiple second connecting positions (7) are spaced apart along the transverse direction of the vehicle, with a distance of 30-60mm between two adjacent second connecting positions (7).

10. A vehicle, characterized in that, Includes the floor beam assembly (100) as described in any one of claims 1-9.

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