Reinforcing beam structure for front floor of new energy vehicle, and mounting method

Abstract

A reinforcing beam structure for a front floor of a new energy vehicle, comprising a front cross beam (7) and a rear cross beam (3). The front cross beam and the rear cross beam are connected by means of a plurality of longitudinal beams; two ends of the front cross beam are each provided with a connecting side beam (8), a plurality of mounting reinforcing supports (9) are provided on the front cross beam, and the front cross beam is connected to a doorsill of a vehicle by means of the connecting side beams; two ends of the rear cross beam are each provided with a front seat rear cross beam side beam, and a front seat middle mounting support (4) is provided in the middle of the rear cross beam; and the plurality of longitudinal beams comprise L-shaped connecting longitudinal beams (5) and rectangular reinforcing longitudinal beams (6), one end of each L-shaped connecting longitudinal beam overlaps the front cross beam, and each rectangular reinforcing longitudinal beam has one end connected to the rear cross beam and the other end connected to the front cross beam. The structure can meet the platform-based design requirements of vehicles and improve the connection strength. Additionally, further provided is a method for mounting the reinforcing beam structure for a front floor of a new energy vehicle.

Description

New energy automobile front floor beam structure and mounting method

[0001] The present disclosure claims priority to the Chinese patent application No. 202410871893.0, filed on July 01, 2024, and entitled "New energy automobile front floor beam structure and mounting method", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to a new energy automobile front floor beam structure and mounting method. BACKGROUND

[0003] With the rapid development of the automobile industry, the reliability, safety and comfort of the automobile are particularly important. In response to the call of national energy saving and emission reduction, plus the increasingly hot new energy market, the endurance mileage requirement of electric vehicles is getting higher and higher. On the basis of meeting various performance requirements, lightweight design is carried out to make the weight of the structure the lightest while meeting the arrangement, performance and process requirements, thereby posing higher challenges.

[0004] The automobile front floor beam belongs to part of the front floor assembly in the vehicle body framework, mainly used for supporting the front seat reinforcing structure, on which seat rails, seat skeletons, auxiliary instrument panels, electrical devices and the like are mainly installed. The beam structure directly affects the comfort of the seat, the use of instruments and electrical devices, and the beam structure design has a great influence on the safety side column impact. Therefore, it is of great significance to design a performance meeting, cost and weight balanced product.

[0005] The existing design is generally a flat floor plus three cross beam stamping parts welded, with small cover plates on both sides of the B column, or with a middle channel plus two cross beam stamping parts welded, or a structure of two longitudinal beams plus two cross beam structures to strengthen the floor structure. Because there is no exhaust system on the pure electric vehicle, there is no middle channel protruding section design on the front floor, which increases the difficulty of the middle mounting point stiffness design of the front seat located on the cross beam, and the stiffness directly affects the comfort of the driver and the front passenger. Moreover, there is not enough space to make the closed beam buckled together at the lower part of the floor for installing the battery, which also increases the difficulty of performance improvement to meet the safety side column impact requirements. SUMMARY

[0006] In view of the problems existing in the prior art, the present application provides a new energy automobile front floor beam structure and mounting method, which can maximize weight reduction, reduce the number of parts and lap joints, and does not increase the material thickness, thereby reducing the overall vehicle weight, reducing the assembly time, reducing the cost, reducing the power consumption of the customer, improving the endurance mileage, and improving the market competitiveness.

[0007] The technical solutions of the present application are as follows:

[0008] According to a first aspect of the present disclosure, a new energy vehicle front floor reinforcing beam structure is provided, comprising a front cross beam and a rear cross beam, the front cross beam and the rear cross beam are connected by a plurality of longitudinal beams; the two ends of the front cross beam are respectively provided with a connecting side beam, a plurality of mounting reinforcing brackets are arranged on the front cross beam, and the front cross beam is connected with the rocker of the vehicle through the connecting side beam; the two ends of the rear cross beam are respectively provided with a front seat rear cross beam side beam, and a front seat middle mounting bracket is arranged at the middle position of the rear cross beam; the plurality of longitudinal beams comprise L-shaped connecting longitudinal beams and rectangular reinforcing longitudinal beams, one end of the L-shaped connecting longitudinal beam is arranged in overlap with the front cross beam, one end of the rectangular reinforcing longitudinal beam is connected with the rear cross beam, and the other end of the rectangular reinforcing longitudinal beam is connected with the front cross beam.

[0009] In some embodiments of the present disclosure, the front seat rear cross beam side beam comprises a first side beam and a second side beam connected with each other, the first side beam covers one side of the rear cross beam away from the front floor of the vehicle and one side of the rear cross beam away from the front cross beam, the second side beam covers one side of the rear cross beam away from the front floor of the vehicle and one side of the rear cross beam close to the front cross beam, and a rocker beam welding edge, a floor welding edge and a side beam connecting welding edge are arranged on the first side beam and the second side beam.

[0010] In some embodiments of the present disclosure, a feature triangular rib is arranged at the connection between the rocker beam welding edge and the first side beam and the second side beam, and the rocker beam welding edge is connected with the rocker beam on the front floor by welding.

[0011] In some embodiments of the present disclosure, the L-shaped connecting longitudinal beam comprises a connecting part and a reinforcing part, the extending direction of the reinforcing part is parallel to the front cross beam, the extending direction of the connecting part is perpendicular to the front cross beam, one end of the connecting part is connected with the rear cross beam, the other end of the connecting part is connected with one end of the reinforcing part, and the reinforcing part is connected with one side of the front cross beam close to the front floor of the vehicle.

[0012] In some embodiments of the present disclosure, the rear cross beam is roll-formed, the cross section of the rear cross beam is a mouth-shaped structure, and a front seat rear cross beam mounting hole and a seat mounting positioning hole are arranged on the rear cross beam.

[0013] In some embodiments of the present disclosure, the front cross beam is stamp-formed, and a front row seat mounting hole is arranged on the boss mounting surface of each mounting reinforcing bracket of the front cross beam.

[0014] In some embodiments of the present disclosure, the plurality of longitudinal beams comprise two L-shaped connecting longitudinal beams, and the two L-shaped connecting longitudinal beams are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam.

[0015] In some embodiments of the present disclosure, the front seat intermediate mounting bracket adopts a welding piece, an edge of the front seat intermediate mounting bracket is provided with a flanging structure, a plurality of second plug welding holes are arranged on the front seat intermediate mounting bracket, and the front seat intermediate mounting bracket is connected to the rear cross beam through the second plug welding holes.

[0016] In some embodiments of the present disclosure, the front seat intermediate mounting bracket is bent towards the direction of the front floor of the vehicle near one side of the front cross beam, and the cross-sectional shape perpendicular to the length direction of the rear cross beam is Z-shaped, and at least part of the front seat intermediate mounting bracket is welded to at least one of the plurality of longitudinal beams.

[0017] In some embodiments of the present disclosure, the front seat intermediate mounting bracket is projected on the front floor of the vehicle as a U-shaped structure, and the concave part of the U-shaped structure is located near one side of the front cross beam.

[0018] In some embodiments of the present disclosure, plug welding holes are arranged on the front seat intermediate mounting bracket, the front seat intermediate mounting bracket is welded to the connecting part through the plug welding holes, and the edge of the front seat intermediate mounting bracket near the front cross beam is a fusion welding boundary connected to the L-shaped connecting longitudinal beam.

[0019] In some embodiments of the present disclosure, a local concave surface is arranged at the middle position of the connecting part, the local concave surface is used to fit the front floor of the vehicle, a battery mounting hole is arranged on the local concave surface, and the connecting part is fixedly connected to the battery through the battery mounting hole.

[0020] In some embodiments of the present disclosure, the plurality of longitudinal beams includes two rectangular reinforcing longitudinal beams, the two rectangular reinforcing longitudinal beams are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam, and the two L-shaped connecting longitudinal beams are located between the two rectangular reinforcing longitudinal beams.

[0021] In some embodiments of the present disclosure, the reinforcing portions of the two L-shaped connecting longitudinal beams respectively extend in opposite directions, the rectangular reinforcing longitudinal beam is located between the reinforcing portion and the rear cross beam, and the other end of the rectangular reinforcing longitudinal beam is connected to the reinforcing portion and the front cross beam, respectively.

[0022] According to a second aspect of the embodiments of the present disclosure, a mounting method of a new energy vehicle front floor reinforcing beam structure is provided, including the following steps:

[0023] The rear cross beam is fixedly mounted on the front floor of the vehicle, and the two ends of the rear cross beam are connected to the left and right rocker panels of the front floor through the front seat rear cross beam side beams, respectively;

[0024] One end of the L-shaped connecting longitudinal beam and one end of the rectangular reinforcing longitudinal beam are connected with the rear cross beam, and are fixedly connected with the front floor;

[0025] The other end of the L-shaped connecting longitudinal beam and the other end of the rectangular reinforcing longitudinal beam are connected with the front cross beam, and the front cross beam is fixedly connected with the floor;

[0026] The two ends of the front cross beam are connected with the rocker of the vehicle through the connecting side beams respectively;

[0027] The front seat middle mounting bracket is mounted at the middle position of the rear cross beam, and a plurality of mounting reinforcing brackets are mounted on the front cross beam.

[0028] The one or more technical solutions of the present application have the following beneficial effects:

[0029] In the new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure, a plurality of longitudinal beams are arranged between the front cross beam and the rear cross beam to form a two-cross and multiple-longitudinal frame structure, and the cross and longitudinal overlapping rectangular frame structure can meet the platformization requirements of the vehicle, not only meeting the requirements of NVH performance, strength fatigue, safety, arrangement, process, etc., but also minimizing the weight and reducing the number of molds, thereby better saving the cost. The structure that the L-shaped connecting longitudinal beam overlaps with the front cross beam can increase the connection area of the L-shaped connecting longitudinal beam and the front cross beam, and improve the connection strength of the L-shaped connecting longitudinal beam and the front cross beam.

[0030] In the new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure, the mounting reinforcing brackets are arranged on the front cross beam, and the front seat middle mounting bracket is arranged on the rear cross beam, so that the connection strength of the seat and the front cross beam and the rear cross beam is improved, and the comfort of the seat is improved. Meanwhile, through the structural design of the front seat middle mounting bracket, the flanging, inclined surface protruding ribs, plug welding holes and other structures are arranged on the front seat middle mounting bracket, so that the rigidity of the middle seat mounting point of the rear cross beam is further increased.

[0031] In the new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure, the front seat rear cross beam side beams are arranged at the two ends of the rear cross beam, so that the connection rigidity of the rear cross beam and the rocker is ensured, the corner of the front seat rear cross beam side beam does not need to be provided with a notch, the force transmission continuity is greatly improved, the required cross section force of the safety side impact and column impact is met, and the rigidity and strength of the seat mounting point are enhanced.

[0032] The new energy automobile front floor reinforcing beam structure provided by the present application innovatively proposes a roll-formed part and cross and longitudinal beam matching scheme design, the rear cross beam is a roll-formed part, the front cross beam is a common stamping part, and various matching connection technologies such as brazing and welding points are used, so that the platformization use performance of the front floor assembly is better, is suitable for various configurations of multiple vehicle models, and makes the product more competitive in the market.

[0033] The design layout of the present application is reasonable, the process is reasonable, the manufacturing is convenient, suitable for mass production, and the manufacturing and production cost is minimized. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 is a schematic diagram of a new energy vehicle front floor beam structure provided by the embodiment of the present application;

[0035] Fig. 2 is a schematic diagram of a new energy vehicle front floor beam structure provided by the embodiment of the present application installed on the front floor of the vehicle;

[0036] Fig. 3 is a schematic diagram of a rear cross beam and a longitudinal beam provided by the embodiment of the present application;

[0037] Fig. 4 is a schematic diagram of a front cross beam and a longitudinal beam provided by the embodiment of the present application;

[0038] Fig. 5 is a schematic diagram of a rear cross beam provided by the embodiment of the present application;

[0039] Fig. 6 is a top view of the rear cross beam provided by the embodiment of the present application;

[0040] Fig. 7 is a schematic diagram of a partial structure of the rear cross beam provided by the embodiment of the present application;

[0041] Fig. 8 is a sectional view of the rear cross beam provided by the embodiment of the present application;

[0042] Fig. 9 is a schematic diagram of a front seat middle mounting bracket provided by the embodiment of the present application;

[0043] Fig. 10 is a schematic diagram of a front seat rear cross beam side beam provided by the embodiment of the present application;

[0044] Fig. 11 is a schematic diagram of an L-shaped connecting longitudinal beam provided by the embodiment of the present application.

[0045] In the drawings: 1, first side beam; 2, second side beam; 1-1, characteristic triangular rib; 1-2, rocker beam welding edge; 1-3, side beam connecting welding edge; 1-4, first plug welding hole; 1-5, floor welding edge; 2-1, butt joint hole; 3, rear cross beam; 3-1, rear cross beam section; 3-2, front seat rear cross beam mounting hole; 3-3, seat mounting positioning hole; 4, front seat middle mounting bracket; 4-1, flange structure; 4-2, inclined convex rib; 4-3, second plug welding hole; 4-4, positioning hole required by stamping process; 4-5, seam welding boundary; 4-6, recessed part; 5, L-shaped connecting longitudinal beam; 5-1, battery mounting hole; 5-2, boss surface; 5-3, connecting part; 5-4, reinforcing part; 6, rectangular reinforcing longitudinal beam; 7, front cross beam; 7-1, recess; 8, connecting side beam; 9, mounting reinforcing bracket; 9-1, front row seat mounting hole. DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] In order to make the objects, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail in conjunction with the accompanying drawings.

[0048] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this present disclosure belongs. The terms "first", "second", "third" and similar terms used in the description and the claims of the present patent application do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not denote a quantity of one, but rather denote the presence of at least one. The terms "include" or "contain" or similar terms mean that the elements or objects appearing before the "include" or "contain" are inclusive of the elements or objects listed after the "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", "top", "bottom" and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0049] FIG. 1 is a schematic view of a front floor beam structure of a new energy vehicle according to an embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in FIG. 1, the front floor beam structure of the new energy vehicle includes a front cross beam 7 and a rear cross beam 3, and the front cross beam 7 and the rear cross beam 3 are connected by a plurality of longitudinal beams; the two ends of the front cross beam 7 are respectively provided with a connecting side beam 8, and a plurality of mounting reinforcing brackets 9 are arranged on the front cross beam 7, and the front cross beam 7 is connected to the rocker of the vehicle through the connecting side beam 8; the two ends of the rear cross beam 3 are respectively provided with a front seat rear cross beam side beam, and a front seat middle mounting bracket 4 is arranged at the middle position of the rear cross beam 3; the plurality of longitudinal beams include L-shaped connecting longitudinal beams 5 and rectangular reinforcing longitudinal beams 6, one end of the L-shaped connecting longitudinal beam 5 is arranged in overlap with the front cross beam 7, one end of the rectangular reinforcing longitudinal beam 6 is connected to the rear cross beam 3, and the other end of the rectangular reinforcing longitudinal beam 6 is connected to the front cross beam 7.

[0050] The new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure is characterized in that a plurality of longitudinal beams are arranged between the front cross beam 7 and the rear cross beam 3 to form a two-cross and multiple-longitudinal frame structure. The cross-longitudinal rectangular frame structure can meet the platform requirements of the vehicle, and can not only meet the requirements of NVH performance, strength fatigue, safety, arrangement, process and the like, but also can minimize the weight and reduce the number of molds, thereby better saving the cost. The mounting reinforcing bracket 9 is arranged on the front cross beam 7, and the front seat middle mounting bracket 4 is arranged on the rear cross beam 3, so that the connection strength of the seat and the front cross beam 7 and the rear cross beam 3 is improved, and the comfort of the seat is improved. The structure that the L-shaped connecting longitudinal beam 5 overlaps with the front cross beam 7 can increase the connection area of the L-shaped connecting longitudinal beam 5 and the front cross beam 7, and improve the connection strength of the L-shaped connecting longitudinal beam 5 and the front cross beam 7.

[0051] FIG. 2 is a structural schematic diagram of the new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure mounted on the front floor of the vehicle. Optionally, as shown in FIG. 2, the number of cross beams can be 2-4, and the number of longitudinal beams can be 2-6. For example, the number of longitudinal beams in the new energy automobile front floor reinforcing beam structure provided by the embodiments of the present disclosure can be four, and the cross beams and the longitudinal beams after being connected form a two-cross and four-longitudinal frame structure on the front floor. The number of cross beams and longitudinal beams can be increased or decreased according to the arrangement and performance requirements, and the number of cross beams and longitudinal beams can also be three and two, or two and five.

[0052] FIG. 5 is a structural schematic diagram of the rear cross beam provided by the embodiments of the present disclosure. FIG. 10 is a schematic diagram of the front seat rear cross beam side beam provided by the embodiments of the present disclosure. As shown in FIG. 5 and FIG. 10, the front seat rear cross beam side beam includes a first side beam 1 and a second side beam 2 connected to each other. The first side beam 1 covers one side of the rear cross beam 3 away from the front floor of the vehicle and one side of the rear cross beam 3 away from the front cross beam 7. The second side beam 2 covers one side of the rear cross beam 3 away from the front floor of the vehicle and one side of the rear cross beam 3 close to the front cross beam 7. The first side beam 1 and the second side beam 2 are provided with a rocker beam welding edge 1-2, a floor welding edge 1-5 and a side beam connecting welding edge 1-3. The rocker beam welding edge 1-2 is provided with a feature triangular rib 1-1 at the connection position of the first side beam 1 and the second side beam 2. The rocker beam welding edge 1-2 is connected to the rocker beam on the front floor by welding.

[0053] By arranging the front seat rear cross beam side beam in a split manner, the connection stiffness with the rocker can be ensured, the corner bending part does not need to be designed with a notch to meet the process, the force transmission continuity can be greatly improved, the required cross-sectional force of the safety side impact and column impact can be met, and the stiffness and strength of the seat mounting point are enhanced. The feature triangular rib 1-1 on the first side beam 1 and the second side beam 2 should be as close to the upper edge of the first side beam 1 and the second side beam 2 as possible, so as to increase the connection bending stiffness of the part itself.

[0054] In addition, the sill beam welding edge 1-2 is arranged to be connected with the sill beam, the floor welding edge 1-5 is arranged to be connected with the front floor, and the floor welding edge 1-5 is provided with a boss at the connection position with the front floor to better match the connection stiffness of the floor. As many connecting welding points as possible can be arranged on the sill beam welding edge 1-2 and the floor welding edge 1-5; the side beam connecting welding edge 1-3 is the welding edge of the first side beam 1 and the second side beam 2, and the three-layer welding is adopted at the connection position of the side beam connecting welding edge 1-3 and the sill, so that the connection stiffness can be better increased and the connection strength can be ensured.

[0055] Fig. 7 is a partial structure schematic view of the rear cross beam provided by the embodiment of the present disclosure. In some embodiments of the present disclosure, as shown in Figs. 5 and 7, the first side beam 1 and the second side beam 2 are further provided with first plug welding holes 1-4. The embodiment of the present disclosure does not limit the specific number of the first plug welding holes 1-4, but the planeness design required by assembly must be met, and the number can be 4-15. For example, eleven first plug welding holes 1-4 are arranged on the first side beam 1 and the second side beam 2. The first plug welding holes 1-4 are mainly used to connect the first side beam 1 and the second side beam 2 with the rear cross beam 3 respectively. The second side beam 2 is provided with a butt joint hole 2-1, and the rear cross beam 3 is provided with a seat installation positioning hole 3-3. The butt joint hole 2-1 is completely coincident with the seat installation positioning hole 3-3, which is used to install the seat and avoid the influence of the position of the second side beam 2 on the installation of the seat.

[0056] In the embodiment, the rear cross beam 3 is integrally formed by rolling. Fig. 6 is a top view of the rear cross beam provided by the embodiment of the present disclosure, and Fig. 8 is a sectional view of the rear cross beam provided by the embodiment of the present disclosure. As shown in Figs. 6-8, the section of the rolled piece is a mouth-shaped structure. Specifically, the section shape of the rolled piece is two or three mouth-shaped structures. In the processing process, the plate part can be first bent to form a small mouth-shaped section, the plate is welded by brazing, and then the remaining part of the plate is rolled and brazed to the small mouth-shaped vertical welding plane to form two closed cavities, which can greatly increase the vertical bending stiffness and axial stiffness and improve the axial force of the section to provide a higher strength guarantee for the safety side column collision.

[0057] Further, the rear cross beam 3 is provided with four front seat rear cross beam mounting holes 3-2, and the middle two mounting holes need to be locally reinforced because they are far away from the sill and have relatively weak stiffness. Similarly, the seat installation positioning hole 3-3 is also provided with four holes.

[0058] Figure 4 is a structural schematic diagram of the front cross beam and the longitudinal beam according to the embodiment of the present disclosure. As shown in Figures 1 and 4, the front cross beam 7 is formed by stamping. Due to the cost and arrangement space, the cross-sectional height of the front cross beam 7 is about 14 mm higher than that of the rear cross beam 3, which can better compensate for the loss of bending stiffness and axial force bearing section caused by the single cavity. The side of the front cross beam 7 away from the front floor of the vehicle is provided with a recess 7-1 for mounting the interior trim of the vehicle and increasing the local stiffness of the rear cross beam 3.

[0059] The connecting side beam 8 is different from the first side beam 1 and the second side beam 2 in that there are different size notches at the corners of the connecting side beam 8. The connecting side beam 8 is simple in structure and easy to stamp, which can meet the requirements of stiffness, strength and collision safety.

[0060] Further, the front cross beam 7 is provided with a front seat mounting hole 9-1 on each boss mounting surface of the mounting reinforcement bracket 9. The mounting reinforcement bracket 9 is connected to the upper surface and the side edge of the front cross beam by welding to form a closed beam structure, which greatly increases the local stiffness of the seat mounting point.

[0061] Figure 3 is a structural schematic diagram of the rear cross beam and the longitudinal beam according to the embodiment of the present disclosure. Figure 9 is a schematic diagram of the front seat intermediate mounting bracket according to the embodiment of the present disclosure. Referring to Figures 3 and 9, the front seat intermediate mounting bracket 4 is a welded part. The edge of the front seat intermediate mounting bracket 4 is provided with a flange structure 4-1, which is beneficial to increase the bending and torsional stiffness of the front seat intermediate mounting bracket 4. For example, the bending height of the flange structure 4-1 in the vehicle height direction can be 4 mm-12 mm. The front seat intermediate mounting bracket 4 is connected to the rear cross beam 3 by welding through a plurality of second plug welding holes 4-3. In one embodiment of the present embodiment, the second plug welding holes 4-3 are 3-15 in number. The specific number of the second plug welding holes 4-3 is not limited, but the flatness design specified by the process should be met, and no abnormal noise should be generated at the contact surface.

[0062] In some embodiments of the present disclosure, as shown in Figures 1 and 3, the L-shaped connecting longitudinal beam 5 includes a connecting portion 5-3 and a reinforcing portion 5-4. The extending direction of the reinforcing portion 5-4 is parallel to the length direction of the front cross beam 7, and the extending direction of the connecting portion 5-3 is perpendicular to the length direction of the front cross beam 7. One end of the connecting portion 5-3 is connected to the rear cross beam 3, and the other end of the connecting portion 5-3 is connected to one end of the reinforcing portion 5-4. The reinforcing portion 5-4 is connected to the side of the front cross beam 7 close to the front floor of the vehicle. The reinforcing portion 5-4 is stacked with the front cross beam 7, thereby increasing the area of the connecting surface between the L-shaped connecting longitudinal beam 5 and the front cross beam 7 and improving the connecting strength between the L-shaped connecting longitudinal beam 5 and the front cross beam 7.

[0063] In some embodiments of the present disclosure, as shown in FIGS. 1 and 3, the plurality of longitudinal beams includes two L-shaped connecting longitudinal beams 5, which are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam 3.

[0064] In some embodiments of the present disclosure, as shown in FIGS. 3 and 9, the front seat middle mounting bracket 4 is bent towards the front floor of the vehicle near one side of the front cross beam 7, and the shape of the cross section of the cross section A-A perpendicular to the length direction of the rear cross beam 3 is Z-shaped, and at least part of the front seat middle mounting bracket 4 is welded to at least one of the plurality of longitudinal beams. The front seat middle mounting bracket 4 is first bent towards the front floor of the vehicle near one side of the front cross beam 7, and then bent towards the front cross beam 7, so that the front seat middle mounting bracket 4 adapts to the connection structure of the rear cross beam 3 and the plurality of longitudinal beams, increases the welding area of the front seat middle mounting bracket 4 and the rear cross beam 3 and the plurality of longitudinal beams, and improves the stability of the seat mounting.

[0065] In some embodiments of the present disclosure, as shown in FIG. 9, the front seat middle mounting bracket 4 is a U-shaped structure in the orthographic projection of the front floor of the vehicle, and the recessed part 4-6 of the U-shaped structure is located near one side of the front cross beam 7, so that the two ends of the front seat middle mounting bracket 4 have Z-shaped bends, and the two ends of the front seat middle mounting bracket 4 are connected to the connecting parts 5-3 of the two L-shaped connecting longitudinal beams 5, respectively.

[0066] Optionally, as shown in FIG. 9, the front seat middle mounting bracket 4 is provided with a plug welding hole, and the front seat middle mounting bracket 4 is welded to the connecting part 5-3 through the plug welding hole to increase the connection stiffness of the longitudinal beam. The edge of the front seat middle mounting bracket 4 near the front cross beam 7 is a burn welding boundary 4-5 connected to the L-shaped connecting longitudinal beam 5, and the length of the burn welding boundary 4-5 should be as large as possible under the premise of meeting the tool operation space to ensure the stiffness of the connection between the L-shaped connecting longitudinal beam 5 and the rear cross beam 3 and increase the transmission path. The stiffness of the front seat middle mounting bracket 4 is a key reinforcing member for increasing the stiffness of the middle seat mounting point on the roll-formed part, and the 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.

[0067] Further, the U-shaped structure on the front seat middle mounting bracket and the connection between the U-shaped structure on the front seat middle mounting bracket and other parts are provided with inclined convex ribs 4-2, which are symmetrically arranged on both sides. Two greatly increase the transition stiffness of the two planes with height difference of the front seat middle mounting bracket 4.

[0068] FIG. 11 is a structural schematic diagram of an L-shaped connecting longitudinal beam provided by an embodiment of the present disclosure. Referring to FIGS. 3, 4 and 11, the L-shaped connecting longitudinal beam 5 has an L-shaped cross section with a certain height in the middle, the L shape can connect the two cross beams 3 and 7 together, the L-shaped connecting longitudinal beam 5 can better enhance the bending stiffness of the rear cross beam 7 than the rectangular reinforcing longitudinal beam 6, which is helpful for the safety of side impact and column impact performance, and can meet the impact performance of the whole vehicle under different battery sizes and different weights of two-wheel drive and four-wheel drive vehicles.

[0069] Further, the connecting part 5-3 of the L-shaped connecting longitudinal beam 5 is provided with a local recessed surface, which is used to be fitted with the floor surface of the vehicle. The local recessed surface is provided with a battery mounting hole 5-1, and the connecting part 5-3 is fixedly connected with the battery through the battery mounting hole 5-1. For example, the local recessed surface is a cross-section inclined surface, which is used to cooperate with the mounting hole feature of the battery on the floor. The connecting part 5-3 can be fixedly connected with the battery through bolts. The planar feature of the local recessed surface is fitted with the surface of the floor, which greatly guarantees the stiffness of the battery connecting point, and the stiffness of the battery connecting part is relatively strong. This greatly enhances the connecting stiffness of the lower part of the floor, and the high-stiffness connecting structure is formed by the battery in the lower part of the floor and the cross beam and longitudinal beam in the upper part of the floor. The stiffness of the connecting point between the rear cross beam mounting hole 3-2 of the front seat on the rear cross beam 3 and the middle seat is effectively guaranteed. Moreover, the cooperation of the battery and the longitudinal beam greatly saves the increase of platform weight and cost.

[0070] Optionally, as shown in FIGS. 3 and 4, the plurality of longitudinal beams includes two rectangular reinforcing longitudinal beams 6, the two rectangular reinforcing longitudinal beams 6 are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam 3, and the two L-shaped connecting longitudinal beams 5 are located between the two rectangular reinforcing longitudinal beams 6. Limited by the assembly space and the process of welding points, all the longitudinal beams do not need to be arranged in the L-shaped structure. The rectangular reinforcing longitudinal beam 6 is closed and welded with the front cross beam, the rear cross beam and the floor around the rectangular reinforcing longitudinal beam 6. This not only increases the bending and torsional stiffness of the cross beams 3 and 7, but also separates the floor area, which can greatly increase the stiffness of the floor sheet panel.

[0071] In some embodiments of the present disclosure, referring to FIG. 3, the reinforcing parts 5-4 of the two L-shaped connecting longitudinal beams 5 respectively extend in opposite directions, the rectangular reinforcing longitudinal beam 6 is located between the reinforcing part 5-4 and the rear cross beam 3, and the other end of the rectangular reinforcing longitudinal beam 6 is connected with the reinforcing part 5-4 and the front cross beam 7, respectively. Specifically, the other end of the rectangular reinforcing longitudinal beam 6 is partially laminated between the front cross beam 7 and the reinforcing part 5-4, and the other end of the rectangular reinforcing longitudinal beam 6 is respectively welded with the front cross beam 7 and the reinforcing part 5-4. The connection structure of the rectangular reinforcing longitudinal beam 6 and the front cross beam 7 and the L-shaped connecting longitudinal beam 5 is more firm, which is conducive to increasing the overall strength of the frame structure formed by the cross beams and the longitudinal beams.

[0072] Optionally, as shown in FIG. 3, the reinforcing portion 5-4 of the L-shaped connecting longitudinal beam 5 is provided with a boss surface 5-2, which protrudes towards the front cross beam 7, and is used to increase the rigidity of the reinforcing portion 5-4 itself, thereby improving the connection strength of the front cross beam 7.

[0073] The mounting process of the new energy automobile front floor reinforcing beam structure provided in the embodiment is as follows:

[0074] The rear cross beam 3 is fixedly installed on the front floor of the vehicle, and the two ends of the rear cross beam 3 are connected to the left and right door sills of the front floor through the front seat rear cross beam side beams, respectively;

[0075] One end of the L-shaped connecting longitudinal beam 5 and one end of the rectangular reinforcing longitudinal beam 6 are connected to the rear cross beam 3 and fixedly connected to the front floor;

[0076] The other end of the L-shaped connecting longitudinal beam 5 and the other end of the rectangular reinforcing longitudinal beam 6 are connected to the front cross beam 7, and the front cross beam 7 is fixedly connected to the floor;

[0077] The two ends of the front cross beam 7 are connected to the left and right door sills of the front floor through the connecting side beams 8, respectively;

[0078] The front seat middle mounting bracket 4 is installed at the middle position of the rear cross beam 3, and a plurality of mounting reinforcing brackets 9 are installed on the front cross beam 7.

[0079] In the new energy automobile front floor reinforcing beam structure provided in the embodiment of the disclosure, a roll-formed part and a cross and longitudinal beam are matched and designed, a plurality of matching and connecting technologies such as brazing and welding points are adopted, the platform use performance of the front floor assembly is better, the strength of the seat and the vehicle body connection point is improved by arranging the mounting reinforcing brackets 9 on the front cross beam and arranging the front seat middle mounting bracket 4 on the rear cross beam, and the comfort of the seat is improved.

[0080] In some embodiments of the disclosure, a mounting method of a new energy automobile front floor reinforcing beam structure is also provided, which is used for mounting the new energy automobile front floor reinforcing beam structure involved in any of the above embodiments, and includes the following steps:

[0081] The rear cross beam 3 is fixedly installed on the front floor, and the two ends of the rear cross beam 3 are connected to the left and right door sills of the front floor through the front seat rear cross beam side beams, respectively;

[0082] One end of the L-shaped connecting longitudinal beam 5 and one end of the rectangular reinforcing longitudinal beam 6 are connected to the rear cross beam 3 and fixed to the front floor;

[0083] The other end of the L-shaped connecting longitudinal beam 5 and the other end of the rectangular reinforcing longitudinal beam 6 are connected to the front cross beam 7, and the front cross beam 7 is fixed to the floor;

[0084] Two ends of the front cross beam 7 are connected with the left and right rocker of the front floor through the side beams 8 respectively;

[0085] A front seat middle mounting bracket 4 is mounted at the middle position of the rear cross beam 3, and a plurality of mounting reinforcing brackets 9 are mounted on the front cross beam 7.

[0086] Various additional exemplary embodiments of the present disclosure can be described by the following examples.

[0087] Example 1. A front floor reinforcing beam structure of a new energy vehicle, comprising a front cross beam 7 and a rear cross beam 3, the front cross beam 7 and the rear cross beam 3 are connected through a plurality of longitudinal beams; two ends of the front cross beam 7 are respectively provided with a connecting side beam 8 connected with the rocker, a plurality of mounting reinforcing brackets 9 are arranged on the front cross beam 7; two ends of the rear cross beam 3 are respectively provided with a front seat rear cross beam side beam, and a front seat middle mounting bracket 4 is arranged at the middle position of the rear cross beam 3; the longitudinal beam comprises 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.

[0088] Example 2. The front floor reinforcing beam structure of the new energy vehicle according to example 1, wherein the front seat rear cross beam side beam comprises a front-rear connected first side beam 1 and a second side beam 2, and the first side beam 1 and the second side beam 2 are provided with a rocker beam welding edge 1-2, a floor welding edge 1-5 and a side beam connecting welding edge 1-3.

[0089] Example 3. The front floor reinforcing beam structure of the new energy vehicle according to example 2, wherein the connecting part of the rocker beam welding edge 1-2 and the side beam is provided with a characteristic triangular rib 1-1, and the rocker beam welding edge 1-2 connects the side beam and the rocker beam on the front floor by welding.

[0090] Example 4. The front floor reinforcing beam structure of the new energy vehicle according to example 1, wherein the rear cross beam 3 is a roll-formed part, the cross section of the roll-formed part is a mouth-shaped structure, and the rear cross beam 3 is provided with a front seat rear cross beam mounting hole 3-2 and a seat mounting positioning hole 3-3.

[0091] Example 5. The front floor reinforcing beam structure of the new energy vehicle according to example 1, wherein the front cross beam 7 is a stamping part, and a boss mounting surface of each mounting reinforcing bracket 9 of the front cross beam 7 is provided with a front row seat front row mounting hole 9-1.

[0092] Example 6. The front floor reinforcing beam structure of the new energy vehicle according to example 1, wherein the front seat middle mounting bracket 4 is a welded part, a flange structure 4-1 is arranged around the front seat middle mounting bracket 4, a plurality of second plug welding holes 4-3 are arranged on the front seat middle mounting bracket 4, and the front seat middle mounting bracket 4 is connected with the rear cross beam 3 by welding through the second plug welding holes 4-3.

[0093] Example 7. The new energy automobile front floor beam reinforcing structure according to example 6, wherein the section of the front seat middle mounting bracket 4 is Z-shaped, one end of the front seat middle mounting bracket 4 is a U-shaped structure, a plug welding hole is arranged on the U-shaped structure, the plug welding hole is connected with the longitudinal beam, and the edge of the front part of the U-shaped structure is used as a plug welding edge 4-5 connected with the longitudinal beam.

[0094] Example 8. The new energy automobile front floor beam reinforcing structure according to example 1, wherein two L-shaped connecting longitudinal beams 5 are arranged, the two L-shaped connecting longitudinal beams 5 are arranged symmetrically left and right, a local recessed surface is arranged at the middle position of the L-shaped connecting longitudinal beam 5 connecting the front cross beam 7 and the rear cross beam 3, the local recessed surface is attached to the front floor surface, a battery mounting hole 5-1 is arranged on the local recessed surface, and the battery is connected through the battery mounting hole 5-1.

[0095] Example 9. The new energy automobile front floor beam reinforcing structure according to example 1, wherein two rectangular reinforcing longitudinal beams 6 are arranged, the two rectangular reinforcing longitudinal beams 6 are arranged symmetrically left and right, and the rectangular reinforcing longitudinal beam 6 is closed and welded around the front cross beam 7, the rear cross beam 3 and the front floor.

[0096] Example 10. A mounting method of the new energy automobile front floor beam reinforcing structure according to example 1, wherein the mounting method comprises the following steps:

[0097] The rear cross beam 3 is fixedly mounted on the front floor, and the two ends of the rear cross beam 3 are connected with the left and right door sills of the front floor through the front seat rear cross beam side beam respectively;

[0098] The L-shaped connecting longitudinal beam 5 and the rectangular reinforcing longitudinal beam 6 are connected with the rear cross beam 3 and fixed with the front floor;

[0099] The L-shaped connecting longitudinal beam 5 and the rectangular reinforcing longitudinal beam 6 are connected with the front cross beam 7, and the front cross beam 7 is fixed with the floor;

[0100] The two ends of the front cross beam 7 are connected with the left and right door sills of the front floor through the side beam respectively;

[0101] The front seat middle mounting bracket 4 is mounted on the middle position of the rear cross beam 3, and a plurality of mounting reinforcing brackets 9 are mounted on the front cross beam 7.

[0102] The mounting method of the new energy automobile front floor beam reinforcing structure provided by the embodiment sequentially arranges the rear cross beam, the longitudinal beam and the front cross beam, and then arranges the front seat middle mounting bracket and the plurality of mounting reinforcing brackets, and each structure is sequentially arranged according to the lapping order, so that the mounting efficiency and the mounting effect of the reinforcing beam structure are improved.

[0103] The above is not any form of restriction on the present disclosure, although the present disclosure has been disclosed as above by examples, however, not to limit the present disclosure, any skilled person in the art, without departing from the technical solution range of the present disclosure, can make some more changes or modifications as equivalent embodiments of equivalent changes by using the above disclosed technical content, but as long as it does not deviate from the technical solution of the present disclosure, according to the technical essence of the present disclosure, any simple modification, equivalent change and modification of the above examples, still belongs to the range of the technical solution of the present disclosure.

Claims

1. A new energy automobile front floor beam structure, characterized in that, The front cross beam (7) and the rear cross beam (3) are connected by a plurality of longitudinal beams; the two ends of the front cross beam (7) are respectively provided with a connecting side beam (8), a plurality of mounting reinforcing supports (9) are arranged on the front cross beam (7), and the front cross beam (7) is connected with the rocker of the vehicle through the connecting side beam (8); the two ends of the rear cross beam (3) are respectively provided with a front seat rear cross beam side beam, and a front seat middle mounting support (4) is arranged at the middle position of the rear cross beam (3); the plurality of longitudinal beams 9 include L-shaped connecting longitudinal beams (5) and rectangular reinforcing longitudinal beams (6), one end of the L-shaped connecting longitudinal beam (5) is arranged in overlap with the front cross beam (7), one end of the rectangular reinforcing longitudinal beam (6) is connected with the rear cross beam (3), and the other end of the rectangular reinforcing longitudinal beam (6) is connected with the front cross beam (7).

2. The new energy vehicle front floor beam reinforcing structure of claim 1, wherein, The front seat rear cross beam side beam includes a first side beam (1) and a second side beam (2) connected with each other, the first side beam (1) covers one side of the rear cross beam (3) away from the front floor of the vehicle and one side of the rear cross beam (3) away from the front cross beam (7), the second side beam (2) covers one side of the rear cross beam (3) away from the front floor of the vehicle and one side of the rear cross beam (3) close to the front cross beam (7), and the first side beam (1) and the second side beam (2) are provided with a rocker beam welding edge (1-2), a floor welding edge (1-5) and a side beam connecting welding edge (1-3).

3. The new energy vehicle front floor beam reinforcing structure of claim 2, wherein, The connecting part (5-3) of the L-shaped connecting longitudinal beam (5) is connected with the rear cross beam (3), and the other end of the connecting part (5-3) is connected with one end of the reinforcing part (5-4), and the reinforcing part (5-4) is connected with one side of the front cross beam (7) close to the front floor of the vehicle.

4. The new energy vehicle front floor beam structure according to any one of claims 1-3, characterized in that, The rear cross beam (3) is roll-formed, the cross section of the rear cross beam (3) is a mouth-shaped structure, and the rear cross beam (3) is provided with a front seat rear cross beam mounting hole (3-2) and a seat mounting positioning hole (3-3).

5. The new energy vehicle front floor beam reinforcing structure according to claim 1, characterized in that, The front cross beam (7) is stamp-formed, and the boss mounting surface of each mounting reinforcing support (9) of the front cross beam (7) is provided with a front row seat mounting hole (9-1).

6. The new energy vehicle front floor beam reinforcing structure according to claim 1, characterized in that, The plurality of longitudinal beams include two L-shaped connecting longitudinal beams (5), and the two L-shaped connecting longitudinal beams (5) are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam (3).

7. The new energy vehicle front floor beam reinforcing structure of claim 4, wherein, ​ 8.The new energy vehicle front floor beam reinforcing structure of claim 7, wherein, The front seat middle mounting bracket (4) is a welding piece, the edge of the front seat middle mounting bracket (4) is provided with a flanging structure (4-1), a plurality of second plug welding holes (4-3) are arranged on the front seat middle mounting bracket (4), and the front seat middle mounting bracket (4) is welded and connected with the rear cross beam (3) through the second plug welding holes (4-3). 9.The new energy vehicle front floor beam reinforcing structure of claim 8, wherein, The front seat middle mounting bracket (4) is bent towards the direction of the front floor of the vehicle on the side close to the front cross beam (7), and the shape of the section perpendicular to the length direction of the rear cross beam (3) is Z-shaped, and at least part of the front seat middle mounting bracket (4) is welded and connected with at least one of the plurality of longitudinal beams. 10.The new energy vehicle front floor beam structure of claim 9, wherein, The front seat middle mounting bracket (4) is a U-shaped structure in the orthographic projection on the front floor of the vehicle, and the recess (4-6) of the U-shaped structure is located on the side close to the front cross beam (7).

11. The new energy vehicle front floor beam structure of claim 10, wherein, The front seat middle mounting bracket (4) is provided with a plug welding hole, the front seat middle mounting bracket (4) is welded and connected with the connecting part (5-3) through the plug welding hole, and the edge of the front seat middle mounting bracket (4) close to the front cross beam (7) is a plug welding edge (4-5) connected with the L-shaped connecting longitudinal beam (5).

12. The new energy vehicle front floor beam reinforcing structure of claim 4, wherein, The middle position of the connecting part (5-3) is provided with a local recess surface for abutting with the front floor surface of the vehicle, and a battery mounting hole (5-1) is arranged on the local recess surface, and the connecting part (5-3) is fixedly connected with the battery through the battery mounting hole (5-1).

13. The new energy vehicle front floor beam structure of claim 12, wherein, The plurality of longitudinal beams include two rectangular reinforcing longitudinal beams (6), the two rectangular reinforcing longitudinal beams (6) are symmetrically arranged about a plane perpendicular to the length direction of the rear cross beam (3), and the two L-shaped connecting longitudinal beams (5) are located between the two rectangular reinforcing longitudinal beams (6).

14. The new energy vehicle front floor beam structure of claim 13, wherein, The reinforcing portions (5-4) of the two L-shaped connecting longitudinal beams (5) respectively extend in opposite directions, the rectangular reinforcing longitudinal beam (6) is located between the reinforcing portion (5-4) and the rear cross beam (3), and the other end of the rectangular reinforcing longitudinal beam (6) is connected with the reinforcing portion (5-4) and the front cross beam (7) respectively.

15. A method of installing a front floor beam structure of a new energy vehicle according to any one of claims 1-14, characterized in that, The method comprises the following steps: The rear cross beam (3) is fixedly mounted on the front floor of the vehicle, and the two ends of the rear cross beam (3) are connected with the left and right rocker panels of the front floor through the front seat rear cross beam side beams respectively; One end of the L-shaped connecting longitudinal beam (5) and one end of the rectangular reinforcing longitudinal beam (6) are connected with the rear cross beam (3) and fixedly connected with the front floor; The other end of the L-shaped connecting longitudinal beam (5) and the other end of the rectangular reinforcing longitudinal beam (6) are connected with the front cross beam (7), and the front cross beam (7) is fixedly connected with the floor; The two ends of the front cross beam (7) are connected with the rocker panels of the vehicle through the connecting side beams (8) respectively; The front seat middle mounting bracket (4) is mounted on the middle position of the rear cross beam (3), and a plurality of mounting reinforcing brackets (9) are mounted on the front cross beam (7).

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