A front floor reinforcement beam structure and installation method for new energy vehicles

Abstract

This invention discloses a front floor reinforcement beam structure and installation method for new energy vehicles, including a front crossbeam and a rear crossbeam, which are connected by multiple longitudinal beams. The front crossbeam has side beams connected to the door sills at both ends, and multiple mounting reinforcement brackets on it. The rear crossbeam has front seat rear crossbeam side beams at both ends, and a front seat center mounting bracket in the middle. The longitudinal beams include L-shaped connecting longitudinal beams and rectangular reinforcing longitudinal beams, with the rectangular reinforcing longitudinal beams located inside the L-shaped connecting longitudinal beams. This invention features two crossbeams and four longitudinal beams, forming a two-horizontal-four-vertical frame structure. The design of the overlapping rectangular frame path meets platform requirements, satisfying not only NVH performance, strength fatigue, safety, layout, and process requirements, but also maximizing weight reduction and minimizing mold quantity, thus saving costs.

Description

Technical Field

[0001] This invention relates to the field of automotive front floor reinforcement structure technology, specifically to a front floor reinforcement beam structure and installation method for new energy vehicles. Background Technology

[0002] With the rapid development of the automotive industry, improving the reliability, safety, and comfort of vehicles is of paramount importance. In response to the national call for energy conservation and emission reduction, coupled with the booming new energy vehicle market, the requirements for the driving range of electric vehicles are becoming increasingly stringent. This presents a significant challenge: to achieve lightweight structures that meet various performance requirements while simultaneously satisfying layout, performance, and manufacturing processes, all while minimizing weight.

[0003] The front floor reinforcement beam of a car is part of the front floor assembly in the car body frame. It is mainly used to support the reinforcement structure of the front seats. The seat rails, seat frame, sub-instrument panel, electrical components, etc. are mainly installed on it. The quality of its beam structure directly affects the comfort of the seats, the instrument panel and the use of electrical components. The beam structure design also has a significant impact on the safety of side pole impact. Therefore, designing a beam that meets performance requirements and balances cost and weight is of great significance.

[0004] Existing designs typically feature a flat floor with three welded, stamped crossbeams, small cover plates on either side of the B-pillar, or a central tunnel with two welded, stamped crossbeams. Other structures use two longitudinal beams and two crossbeams to reinforce the floor. In pure electric vehicles, the absence of an exhaust system and the lack of a central tunnel on the front floor complicates the design of the rigidity of the central mounting point of the front seats on the crossbeams, directly impacting the comfort of the driver and front passenger. Furthermore, the lack of space under the floor for battery installation prevents the creation of a closed, interlocking beam, further complicating performance requirements for side pole impact safety. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a front floor reinforcement beam structure and installation method for new energy vehicles. Under the conditions of meeting the requirements of layout, process and various performance, it can maximize weight reduction, reduce the number of parts and overlaps, and not increase material thickness. This is conducive to reducing the overall vehicle weight, reducing assembly time, thereby reducing costs, reducing power consumption for customers, increasing driving range, and thus improving market competitiveness.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the invention, a front floor reinforcement beam structure for a new energy vehicle is provided, comprising a front crossbeam and a rear crossbeam, wherein the front crossbeam and the rear crossbeam are connected by a plurality of longitudinal beams; both ends of the front crossbeam are respectively provided with side beams connected to the door sill, and a plurality of mounting reinforcement brackets are provided on the front crossbeam; both ends of the rear crossbeam are respectively provided with side beams of the rear crossbeam of the front seat, and a middle mounting bracket of the front seat is provided in the middle of the rear crossbeam; the longitudinal beams include an L-shaped connecting longitudinal beam and a rectangular reinforcing longitudinal beam, wherein the rectangular reinforcing longitudinal beam is located inside the L-shaped connecting longitudinal beam.

[0008] In some embodiments of the present invention, the rear crossbeam of the front seat includes a first side beam and a second side beam connected front and rear, and the first side beam and the second side beam are provided with a sill beam welding edge, a floor welding edge and a side beam connection welding edge.

[0009] In some embodiments of the present invention, a characteristic triangular rib is provided at the connection between the welded edge of the sill beam and the side beam, and the welded edge of the sill beam connects the side beam to the sill beam on the front floor by welding.

[0010] In some embodiments of the present invention, the rear crossbeam is made of a roll forming member with a U-shaped cross section, and the rear crossbeam is provided with front seat rear crossbeam mounting holes and seat mounting positioning holes.

[0011] In some embodiments of the present invention, the front crossbeam is made of stamped material, and each boss mounting surface of the front crossbeam for mounting reinforcement brackets is provided with front seat mounting holes.

[0012] In some embodiments of the present invention, the center mounting bracket of the front seat is a welded component, and a flange is provided around the center mounting bracket of the front seat. The center mounting bracket of the front seat is provided with a plurality of plug welding holes, and is welded to the rear crossbeam through the plug welding holes.

[0013] In some embodiments of the present invention, the cross-section of the center mounting bracket of the front seat is Z-shaped, one end of the center mounting bracket of the front seat is a U-shaped structure, the U-shaped structure is provided with plug welding holes, and is connected to the longitudinal beam through the plug welding holes, and the front edge of the U-shaped structure serves as the welding boundary for connection with the longitudinal beam.

[0014] In some embodiments of the present invention, two L-shaped connecting longitudinal beams are provided, and the two L-shaped connecting longitudinal beams are symmetrically arranged on the left and right. A partial concave surface is provided at the middle position of the L-shaped connecting longitudinal beams connecting the front crossbeam and the rear crossbeam. The partial concave surface is in contact with the front floor surface, and a battery mounting hole is provided on the partial concave surface for connecting the battery.

[0015] In some embodiments of the present invention, two rectangular reinforcing longitudinal beams are provided, and the two rectangular reinforcing longitudinal beams are arranged symmetrically on the left and right sides. The four sides of the rectangular reinforcing longitudinal beams are welded to the front crossbeam, the rear crossbeam and the front floor.

[0016] In a second aspect of the present invention, a method for installing a front floor reinforcement beam structure of a new energy vehicle is provided, comprising the following steps:

[0017] The rear crossbeam is fixedly installed on the front floor, and both ends of the rear crossbeam are connected to the left and right door sills of the front floor via the side beams of the rear crossbeam of the front seat.

[0018] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the rear cross beam and fix them to the front floor;

[0019] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the front crossbeam, and fix the front crossbeam to the floor;

[0020] Connect both ends of the front crossbeam to the left and right thresholds of the front floor via side beams;

[0021] Install a center mounting bracket for the front seat in the middle of the rear crossbeam, and install multiple mounting reinforcement brackets on the front crossbeam.

[0022] One or more technical solutions of the present invention have the following beneficial effects:

[0023] (1) The new energy vehicle front floor reinforcement beam structure provided by the present invention has two horizontal beams and four vertical beams to form a frame structure of two horizontal and four vertical beams. The design of the horizontal and vertical overlapping rectangular frame path can meet the platform requirements. It can not only meet the requirements of NVH performance, strength fatigue, safety, layout, process, etc., but also reduce weight to the maximum extent and reduce the number of molds, thus saving costs.

[0024] (2) The new energy vehicle front floor reinforcement beam structure provided by the present invention can improve the strength of the connection point between the seat and the vehicle body and improve the comfort of the seat by setting a reinforcement bracket on the front crossbeam and a front seat middle mounting bracket on the rear crossbeam. At the same time, by designing the structure of the front seat middle mounting bracket, setting a flange, a sloping rib, a plug weld hole and other structures on the front seat middle mounting bracket, the rigidity of the seat mounting point in the middle of the rear crossbeam can be further increased.

[0025] (3) The front floor reinforcement beam structure of the new energy vehicle provided by the present invention has separate side beams at both ends of the rear crossbeam, which can ensure the connection rigidity with the door sill. No notch needs to be opened at the corner bend, which can greatly improve the continuity of force transmission, meet the cross-sectional force required for safe side collision and pole collision, and enhance the rigidity and strength at the seat mounting point.

[0026] (4) The new energy vehicle front floor reinforcement beam structure provided by the present invention innovatively proposes a design scheme for the combination of roll forming parts and cross and longitudinal beams. The rear cross beam adopts roll forming parts, and the front cross beam adopts ordinary stamping parts. Various combination connection technologies such as welding and welding points are adopted to make the platform use performance of the front floor assembly better, suitable for multiple configurations of multiple models, and make the product more competitive in the market.

[0027] (5) The design layout of the present invention is reasonable, the process is reasonable, and it is easy to manufacture. It is suitable for mass production and minimizes manufacturing and production costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the reinforcing beam assembly structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the reinforcing beam of the present invention installed on the front floor;

[0030] Figure 3 This is a schematic diagram of the structure after the rear crossbeam and longitudinal beams of the present invention are connected;

[0031] Figure 4 This is a schematic diagram of the structure after the front crossbeam and longitudinal beams of the present invention are connected;

[0032] Figure 5 This is a schematic diagram of the structure of the rear crossbeam of the present invention;

[0033] Figure 6 This is a top view of the rear crossbeam of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the roller pressing component in the rear crossbeam of the present invention;

[0035] Figure 8 This is a cross-sectional view of the roller pressing component in the rear crossbeam of the present invention;

[0036] Figure 9 This is a front view of the center mounting bracket for the front seat according to the present invention;

[0037] Figure 10 This is a top view of the rear crossbeam side beam of the front seat according to the present invention;

[0038] Figure 11 This is a schematic diagram of the L-shaped connecting longitudinal beam of the present invention.

[0039] In the diagram: 1. First side beam; 2. Second side beam; 1-1. Characteristic triangular rib; 1-2. Sill beam welding edge; 1-3. Side beam connection welding edge; 1-4. First plug weld hole; 1-5. Floor welding edge; 2-1. Front seat rear side beam mounting point; 3. Rear crossbeam; 3-1. Rear crossbeam cross section; 3-2. Front seat rear crossbeam mounting hole; 3-3. Seat mounting positioning hole; 4. Front seat center mounting bracket; 4-1. Flanged edge; 4-2. Beveled rib; 4-3. Second plug weld hole; 4-4. Positioning hole required for stamping process; 4-5. Welding boundary; 5. L-shaped connecting longitudinal beam; 5-1. Battery mounting hole; 5-2. Boss surface; 6. Rectangular reinforcing longitudinal beam; 7. Front crossbeam; 7-1. Recess; 8. Side beam connected to sill; 9. Reinforcing mounting bracket; 9-1. Front seat front mounting hole. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] In a typical embodiment of the present invention, a front floor reinforcement beam structure for new energy vehicles is proposed, such as... Figure 1 As shown, it includes a front crossbeam 7 and a rear crossbeam 3, which are connected by multiple longitudinal beams; the two ends of the front crossbeam 7 are respectively provided with side beams 8 connected to the door sill, and multiple mounting reinforcement brackets 9 are provided on the front crossbeam 7; the two ends of the rear crossbeam 3 are respectively provided with the front seat rear crossbeam side beams, and the middle position of the rear crossbeam 3 is provided with the front seat middle mounting bracket 4; the longitudinal beams include an L-shaped connecting longitudinal beam 5 and a rectangular reinforcing longitudinal beam 6, and the rectangular reinforcing longitudinal beam 6 is located inside the L-shaped connecting longitudinal beam 5.

[0043] like Figure 2 As shown, the connected crossbeams and longitudinal beams form a two-horizontal-four-longitudinal frame structure on the front floor. The number of crossbeams and longitudinal beams can be increased or decreased according to the layout and performance requirements. It can also be designed with three crossbeams and two longitudinal beams, or two crossbeams and five longitudinal beams. The number of crossbeams can be 2-4, and the number of longitudinal beams can be 2-6.

[0044] like Figure 5 and Figure 10As shown, the rear crossbeam of the front seat includes a first side beam 1 and a second side beam 2 connected front and rear. The first side beam 1 and the second side beam 2 are provided with a sill beam welding edge 1-2, a floor welding edge 1-5, and a side beam connecting welding edge 1-3. A characteristic triangular rib 1-1 is provided at the connection between the sill beam welding edge 1-2 and the side beam. The sill beam welding edge 1-2 connects the side beam to the sill beam on the front floor by welding. By separating the rear crossbeam of the front seat, the connection rigidity with the sill can be ensured. To meet the process requirements, no notches are needed at the corner bends, which greatly improves the continuity of force transmission, meets the cross-sectional force required for safe side impacts and pole impacts, and enhances the rigidity and strength at the seat mounting point. The height of the characteristic triangular rib 1-1 on the first side beam 1 and the second side beam should be as high as possible, but less than or equal to the height of the welding edge, which greatly increases the connection bending rigidity of the component itself.

[0045] In addition, the sill beam is connected to the sill beam by welding edge 1-2, and the floor is connected to the front floor by welding edge 1-5. There is a protrusion at the connection between the floor welding edge 1-5 and the floor to better match the connection rigidity at the floor. The sill beam welding edge 1-2 and the floor welding edge 1-5 are connected with as many welding points as possible according to the process. The side beam connection welding edge 1-3 is the welding edge of the first side beam 1 and the second side beam 2, and the connection between the side beam connection welding edge 1-3 and the sill is guaranteed to be 3 layers of welding, which can better increase the connection rigidity and ensure the connection strength.

[0046] First plug weld holes 1-4 are also provided on the first side beam 1 and the second side beam 2, totaling 11 holes on the first side beam 1 and the second side beam 2. However, the number is not limited, but it must meet the flatness design required for assembly. Therefore, the number needs to be designed in balance with the process requirements, and can be 4-15. The plug weld holes are mainly used to connect the first side beam 1, the second side beam 2 and the rear cross beam 3, and to increase the rigidity at the local mounting hole. The local mounting hole is the mounting point 2-1 of the rear side beam of the front seat.

[0047] In this embodiment, the rear crossbeam 3 is a roll-formed part, and the roll-formed part 3 is an integrally formed part through a roll forming process, such as... Figure 6-8 As shown, the cross-section of the roll forming part is a U-shaped structure. Specifically, the cross-sectional shape of the roll forming part is two U-shaped parts, and it can also be derived into three U-shaped parts. The characteristic section is first formed into a small U-shaped section, which is welded together, and then rolled and welded to the small U-shaped vertical welding plane. The two closed cavities formed can greatly increase the vertical bending stiffness and axial stiffness, improve the axial force of the section, and provide a high strength guarantee to meet the safety requirements of side column impact.

[0048] Furthermore, the rear crossbeam 3 is provided with front seat rear crossbeam mounting holes 3-2 and seat mounting positioning holes 3-3. There are four front seat rear crossbeam mounting holes 3-2. The two middle mounting holes are relatively weak in rigidity because they are far from the door sill, so they need to be locally reinforced. Similarly, there are also four seat mounting positioning holes 3-3.

[0049] like Figure 4 As shown, the front crossbeam 7 is made of stamped parts. Due to cost constraints and its layout, the cross-sectional height is 14mm higher than that of the rear crossbeam 3, which can better compensate for the loss of bending stiffness and axial force of the cross section caused by the single cavity. The design of the recessed platform 7-1 not only meets the installation requirements of interior parts, but also increases the local stiffness of the large surface.

[0050] Due to limitations in layout and cost, the side beam 8 connected to the threshold differs from the first side beam 1 and the second side beam 2 in that it has a notch design of varying degrees at the corner. Designing it as a single piece can save costs, and the stamping process is simple, while still meeting the requirements for rigidity, strength, and collision safety.

[0051] Furthermore, each mounting bracket 9 of the front crossbeam 7 has a front seat mounting hole 9-1 on its boss mounting surface. The mounting bracket 9 is connected to the upper surface and side weld points of the front crossbeam to form a closed beam structure, which greatly increases the local rigidity of the seat mounting point.

[0052] refer to Figure 3 and Figure 9 The center mounting bracket 4 of the front seat is a welded component, with a flange 4-1 arranged around its perimeter. The higher the flange, the better the component's bending and torsional rigidity; the flange height can be in the range of 4-12mm. The center mounting bracket 4 of the front seat has multiple second weld holes 4-3, which are welded to the rear crossbeam 3. In one specific embodiment, the number of second weld holes 4-3 is 3-15, with no limit, but they must meet the flatness design specified by the process and not produce abnormal noise at the contact surface.

[0053] In this embodiment, the cross-section of the front seat center mounting bracket is Z-shaped, and one end of the front seat center mounting bracket is a U-shaped structure. The U-shaped structure is provided with plug welding holes, which are connected to the longitudinal beam to increase the connection stiffness with the longitudinal beam. The front edge of the U-shaped structure serves as the welding boundary 4-5 for connection with the longitudinal beam, and its length is the maximum allowable length after satisfying the tool operating space. This can ensure the stiffness at the connection between the longitudinal beam and the cross beam and increase the transmission path. The stiffness of the front seat center mounting bracket 4 is a key reinforcing component for increasing the stiffness of the center seat mounting point on the roll forming part. Seat comfort is related to the stiffness of the body connection point and the stiffness of the seat itself. Good stiffness of the body connection point is one of the important indicators of seat comfort.

[0054] Furthermore, the connection between the U-shaped structure on the center mounting bracket of the front seat and other parts of the center mounting bracket of the front seat is provided with inclined ribs 4-2. There are two inclined ribs 4-2 symmetrically arranged on the left and right sides, which greatly increases the transition stiffness of the two planes with height difference of the center mounting bracket of the front seat 4.

[0055] refer to Figure 3 , Figure 4 and Figure 11 There are two L-shaped connecting longitudinal beams 5, which are symmetrically arranged on the left and right. The middle of the L-shaped connecting longitudinal beam 5 has an L-shaped cross section with a certain height protrusion. The L-shape can connect the two cross beams 3 and 7 together. Compared with the rectangular reinforcing longitudinal beam 6, it can better enhance the bending stiffness of the rear cross beam 7, which helps to ensure safe side collision and pole collision performance, and meets the collision performance of the whole vehicle under different battery sizes and different weights of two-wheel drive and four-wheel drive vehicles.

[0056] Furthermore, a partially recessed surface is provided at the midpoint of the L-shaped connecting longitudinal beam connecting the front crossbeam 7 and the rear crossbeam 3. This partially recessed surface is in contact with the floor surface, and a battery mounting hole 5-1 is provided on the partially recessed surface for connecting the battery. The partially recessed surface has a sloping cross-section that matches the floor surface for the battery mounting hole. The planar feature of the partially recessed surface matches the floor surface, greatly ensuring the rigidity of the battery connection point. The high rigidity of the battery connection point greatly enhances the connection rigidity of the lower part of the floor. The battery at the lower part of the floor and the crossbeams and longitudinal beams at the upper part of the floor form a high-rigidity connection structure, effectively ensuring the rigidity at the connection point between the front seat rear crossbeam mounting hole 3-2 and the middle seat on the rear crossbeam 3. The cooperation between the battery and the longitudinal beam also greatly reduces the increase in platform weight and cost.

[0057] like Figure 3 and Figure 4 As shown, there are two rectangular reinforcing longitudinal beams 6, which are symmetrically arranged on the left and right. Due to the limited assembly space and process welding points, they cannot be made into an L-shape. They are welded to the front crossbeam, the rear crossbeam, and the floor around their perimeter. This not only increases the bending and torsional stiffness of the crossbeams 3 and 7, but also separates the floor area, which can greatly increase the stiffness of the thin floor panel.

[0058] The installation process of the front floor reinforcement beam structure for new energy vehicles provided in this embodiment is as follows:

[0059] The rear crossbeam is fixedly installed on the front floor, and both ends of the rear crossbeam are connected to the left and right door sills of the front floor via the side beams of the rear crossbeam of the front seat.

[0060] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the rear cross beam and fix them to the front floor;

[0061] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the front crossbeam, and fix the front crossbeam to the floor;

[0062] Connect both ends of the front crossbeam to the left and right thresholds of the front floor via side beams;

[0063] Install a center mounting bracket for the front seat in the middle of the rear crossbeam, and install multiple mounting reinforcement brackets on the front crossbeam.

[0064] The front floor reinforcement beam structure for new energy vehicles provided in this embodiment proposes a design scheme combining roll-formed parts with transverse and longitudinal beams. It adopts various connection technologies such as welding and weld points to improve the platform utilization performance of the front floor assembly. By setting and installing a reinforcement bracket 9 on the front crossbeam and setting a front seat middle mounting bracket 4 on the rear crossbeam, the strength of the connection point between the seat and the vehicle body can be improved, thereby enhancing the comfort of the seat.

[0065] Example 2

[0066] In a typical embodiment of the present invention, a method for installing a front floor reinforcement beam structure in a new energy vehicle is provided, comprising the following steps:

[0067] The rear crossbeam is fixedly installed on the front floor, and both ends of the rear crossbeam are connected to the left and right door sills of the front floor via the side beams of the rear crossbeam of the front seat.

[0068] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the rear cross beam and fix them to the front floor;

[0069] Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the front crossbeam, and fix the front crossbeam to the floor;

[0070] Connect both ends of the front crossbeam to the left and right thresholds of the front floor via side beams;

[0071] Install a center mounting bracket for the front seat in the middle of the rear crossbeam, and install multiple mounting reinforcement brackets on the front crossbeam.

[0072] The installation method of the front floor reinforcement beam structure of the new energy vehicle provided in this embodiment involves installing the rear crossbeam, longitudinal beam and front crossbeam in sequence, and then installing the front seat middle mounting bracket and multiple mounting reinforcement brackets. The various structures are installed in sequence according to the overlapping order, which improves the installation efficiency and installation effect of the reinforcement beam structure.

[0073] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A front floor reinforcement beam structure for a new energy vehicle, characterized in that, It includes a front crossbeam and a rear crossbeam, which are connected by multiple longitudinal beams; the two ends of the front crossbeam are respectively provided with side beams connected to the door sill, and multiple mounting reinforcement brackets are provided on the front crossbeam; the two ends of the rear crossbeam are respectively provided with the front seat rear crossbeam side beams, and the middle position of the rear crossbeam is provided with the front seat middle mounting bracket; the longitudinal beams include L-shaped connecting longitudinal beams and rectangular reinforcing longitudinal beams, and the rectangular reinforcing longitudinal beams are located inside the L-shaped connecting longitudinal beams; The rear crossbeam of the front seat includes a first side beam and a second side beam connected front and rear. The first side beam and the second side beam are provided with a sill beam welding edge, a floor welding edge and a side beam connection welding edge. The sill beam is provided with a characteristic triangular rib at the connection between the welded edge and the side beam. The welded edge of the sill beam connects the side beam to the sill beam on the front floor by welding. There are two L-shaped connecting longitudinal beams, which are symmetrically arranged on the left and right. A partial concave surface is provided in the middle position of the L-shaped connecting longitudinal beams connecting the front crossbeam and the rear crossbeam. The partial concave surface is in contact with the front floor surface and a battery mounting hole is provided on the partial concave surface for connecting the battery. There are two rectangular reinforcing longitudinal beams, which are symmetrically arranged on the left and right sides. The rectangular reinforcing longitudinal beams are welded to the front crossbeam, the rear crossbeam, and the front floor around their perimeter.

2. The front floor reinforcement beam structure for new energy vehicles as described in claim 1, characterized in that, The rear crossbeam is made of a roll-formed component with a U-shaped cross section. The rear crossbeam is provided with front seat rear crossbeam mounting holes and seat mounting positioning holes.

3. The front floor reinforcement beam structure for new energy vehicles as described in claim 1, characterized in that, The front crossbeam is made of stamped parts, and each boss mounting surface of the front crossbeam for mounting reinforcement brackets is provided with front seat mounting holes.

4. The front floor reinforcement beam structure for new energy vehicles as described in claim 1, characterized in that, The center mounting bracket of the front seat is a welded component, with a flange around the center mounting bracket. The center mounting bracket of the front seat has multiple plug welding holes, which are welded to the rear crossbeam.

5. The front floor reinforcement beam structure for new energy vehicles as described in claim 4, characterized in that, The cross-section of the center mounting bracket of the front seat is Z-shaped, and one end of the center mounting bracket of the front seat is a U-shaped structure. The U-shaped structure is provided with plug welding holes, which are connected to the longitudinal beam. The front edge of the U-shaped structure serves as the welding boundary for connection with the longitudinal beam.

6. A method for installing a front floor reinforcement beam structure for a new energy vehicle as described in any one of claims 1-5, characterized in that, Includes the following steps: The rear crossbeam is fixedly installed on the front floor, and both ends of the rear crossbeam are connected to the left and right door sills of the front floor via the side beams of the rear crossbeam of the front seat. Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the rear cross beam and fix them to the front floor; Connect the L-shaped connecting longitudinal beam and the rectangular reinforcing longitudinal beam to the front crossbeam, and fix the front crossbeam to the floor; Connect both ends of the front crossbeam to the left and right thresholds of the front floor via side beams; Install a center mounting bracket for the front seat in the middle of the rear crossbeam, and install multiple mounting reinforcement brackets on the front crossbeam.

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