An integrated casting floor reinforcement bracket for the lower body of an electric vehicle and its method

Abstract

This invention relates to the field of automotive body structure technology, and in particular to a reinforced floor support bracket and method for an integrated cast lower body of an electric vehicle. The structure includes a first mounting plane for connecting to the floor, a second mounting plane for connecting to the integrated cast lower body, and two support structures disposed between the two. The two support structures are symmetrically arranged on both sides of the first mounting plane, and the second mounting plane is located at the outer edge of the bottom end of the support structures. The method involves designing reinforced floor supports for the integrated cast lower body of an electric vehicle suitable for the front and rear floors, respectively. The support positions and the number of bolt mounting points are determined based on the simulation analysis results of the seat mounting point stiffness. After the structural design is completed according to the analysis, the supports are assembled between the floor and the integrated cast lower body using bolts. This invention, by setting a reinforced support with better stiffness, greatly improves the mounting point stiffness of the seat mounting points. It also increases the support capacity for the entire front and rear floors, improving overall performance.

Description

Technical Field

[0001] This invention relates to the field of automotive body structure technology, and in particular to an integrated casting floor reinforcement bracket and method for the lower body of an electric vehicle. Background Technology

[0002] With the continuous development of the concept of automotive lightweighting, integrated casting structures for the lower body of electric vehicles are widely used. As an indispensable and important structure in the entire vehicle body, the floor is the foundation of the passenger compartment, supporting the facilities and personnel inside the vehicle. It requires reliable safety and can stably provide support. The rationality of its layout has a great impact on the rigidity of the vehicle body structure, especially the seat mounting points.

[0003] Currently, due to the unique nature of the unibody casting structure, the floor suffers from issues such as irrational layout, insufficient support / overall softness, and poor rigidity. This also results in low stiffness at the seat mounting points on the floor beams, posing a safety risk. To improve support rigidity, multiple reinforcing ribs and supporting beams and longitudinal beams are typically added to the floor, but this increases the overall weight of the vehicle body, contradicting the concept of lightweight automotive development. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a floor reinforcement bracket and method for an integrated casting of the lower body of an electric vehicle. By setting a reinforcement bracket with better rigidity, the problems of weak floor structure and insufficient rigidity of seat mounting points are solved. To achieve the above objective, the present invention is implemented through the following technical solution:

[0005] In a first aspect, the present invention provides a floor reinforcement bracket for an integrated casting of the lower body of an electric vehicle, including a first mounting plane for connecting to the floor, a second mounting plane for connecting to the integrated casting of the lower body, and two support structures disposed between the two; the two support structures are symmetrically disposed on both sides of the first mounting plane, and the second mounting plane is disposed at the outer edge of the bottom end of the support structure.

[0006] The reinforced bracket boasts good rigidity and a simple structure. During use, it is mounted between the floor and the unibody cast lower body as a support. With a reasonable spatial arrangement, it significantly improves the rigidity of the seat mounting points. Simultaneously, it increases the support capacity for the entire front and rear floors, enhancing overall performance.

[0007] As a further implementation, the first mounting plane, the second mounting plane, and the supporting structure are an integral structure formed by stamping sheet metal.

[0008] As a further implementation, the edges of the first mounting plane and the supporting structure are provided with an integral inward flange to ensure that the edges of the supporting plane have sufficient rigidity and strength and are not easily bent.

[0009] As a further implementation, each of the aforementioned support structures is provided with at least one weight-reducing hole.

[0010] As a further implementation, each of the aforementioned support structures is provided with an integral through-rib structure.

[0011] As a further implementation, a channel is provided between the two supporting structures.

[0012] As a further implementation, the first mounting plane is provided with a boss symmetrically on the side connected to the floor, and the boss has a first mounting hole. By adding a boss to the first mounting plane, the rigidity of the first mounting hole can be improved.

[0013] As a further implementation, the support structure area between the boss and the second mounting plane forms a groove inward or a protrusion outward. By setting a groove or protrusion structure on the support structure, the rigidity and strength are improved, which is beneficial to improving the support capacity of the reinforced bracket.

[0014] As a further implementation, each side of the second mounting plane is provided with at least one second mounting hole.

[0015] In a second aspect, the present invention provides a method for using the integrated casting floor reinforcement bracket for the lower body of an electric vehicle as described in the first aspect, comprising the following steps:

[0016] Design separate integrated casting floor reinforcement brackets for the front and rear floors of electric vehicles. The support positions and the number of bolt mounting points are determined based on the simulation analysis results of the seat mounting point stiffness. After the structural design is completed according to the analysis, the brackets are assembled between the floor and the integrated casting lower body using bolts.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The reinforcing bracket of this invention has good rigidity and a simple structure. In use, it is assembled between the floor and the unibody casting of the lower vehicle body as a support. Under the premise of reasonable spatial arrangement, it greatly improves the rigidity of the seat mounting point. At the same time, while increasing the support capacity for the entire front and rear floors and improving overall performance, it has little impact on the overall weight of the vehicle body.

[0019] 2. The first mounting plane of the present invention and the edges of the support structure are provided with flanges that turn inward integrally, ensuring that the edges of the support plane have sufficient stiffness and strength and are not easily bent; each support structure is provided with an integral through-rib structure, improving its support capacity; by providing grooves or protrusion structures on the support structure, the stiffness and strength are improved, which is beneficial to enhancing the support capacity of the reinforcement bracket; the bosses added on the first mounting plane can improve the stiffness of the first mounting holes.

[0020] 3. The first mounting plane, the second mounting plane and the support structure of the present invention are an integral structure formed by stamping a sheet. Since the reinforcement bracket is integrally stamped and formed, its manufacturing, maintenance and replacement are convenient, platformization can be achieved, and the integral structure has relatively high strength and fewer weak points in strength, which is beneficial to enhancing the stiffness of the reinforcement bracket.

[0021] 4. Since the reinforcement bracket of the present invention is in a "U" shape and there is a channel between the two support structures, the space inside the two support structures provides a layout space for the wire harness, improving the regularity of the internal space and also reducing the risk of wire harness jitter.

[0022] 5. The reinforcement bracket structure of the present invention is connected to the floor and the lower body of the integral casting through bolts. The floor is connected to the seat crossbeam, increasing the transmission path at the seat crossbeam and enhancing the support capacity, thus solving the problem of insufficient stiffness at the seat mounting point. BRIEF DESCRIPTION OF THE DRAWINGS <……><……>The schematic drawings forming a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions thereof are used to explain the present invention and do not constitute an improper limitation to the present invention. <……><……><……>It is a schematic diagram of the front floor reinforcement bracket structure in an embodiment of the present invention. <……><……><……>It is a schematic diagram of the rear floor reinforcement bracket structure in an embodiment of the present invention.

[0026] Figure 3 It is a schematic diagram of the front and rear floor structures in an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the assembly of the front and rear floor reinforcement brackets and the front and rear floors in an embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the assembly of the front and rear floor reinforcement brackets and the lower body of the integral cast aluminum part in an embodiment of the present invention.

[0029] <000006​​​The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0031] Among them: 1. First mounting plane; 11. Boss; 12. First mounting hole; 2. Support structure; 21. Weight reduction hole; 3. Second mounting plane; 31. Second mounting hole; 4. Flanged edge; 5. Rear floor; 51. Third mounting hole; 6. Front floor; 61. Fourth mounting hole; 7. Front floor reinforcement bracket; 8. Rear floor reinforcement bracket; 9. One-piece cast lower body; 91. Support leg. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] Example 1

[0034] In a typical embodiment of the present invention, reference is made to Figure 1 and Figure 2 As shown, an integrated casting floor reinforcement bracket for the lower body of an electric vehicle includes a first mounting plane 1 for connecting to the floor, a second mounting plane 3 for connecting to the integrated casting lower body 9, and two support structures 2 connecting the first mounting plane 1 and the second mounting plane 3. The two sides of the first mounting plane 1 are connected to the second mounting plane 3 through the support structures 2. The first mounting plane 1, the support structures 2, and the second mounting plane 3 are an integrated structure.

[0035] like Figure 3 As shown, the floor is divided into a front floor (6) and a rear floor (5). To match the front floor (6) and the rear floor (5), reinforcing brackets should be designed separately. The overall structure of the separately designed reinforcing brackets is the same, only differing in size and the number of mounting holes. The specific dimensions can be determined according to actual needs.

[0036] Two support structures 2 are symmetrically arranged on both sides of the first mounting plane 1 to support the first mounting plane 1 and the second mounting plane 3, and the second mounting plane 3 is located at the bottom outer edge of the support structure 2.

[0037] In this embodiment, the first mounting plane 1, the second mounting plane 3, and the support structure 2 are integral structures formed by stamping sheet metal. Since the reinforcing bracket is integrally stamped, it is convenient to manufacture, repair, and replace, and can be platform-based. Furthermore, the integral structure has high strength and fewer weak points, which helps to enhance the rigidity of the reinforcing bracket.

[0038] After the overall stamping of the sheet material, the longitudinal sections of the first mounting plane 1, the second mounting plane 3 and the support structure 2 are in a "U" - shaped structure. And the included angle between the two sets of support structures 2 of each reinforcing bracket is an acute angle.

[0039] The reinforcing bracket of this embodiment has good rigidity and a simple structure. When in use, it is assembled between the floor and the lower body 9 of the integral casting as a support. The included angle between the two sets of support structures 2 of each reinforcing bracket is an acute angle, which can form a triangular stable support structure. On the premise of reasonable spatial layout, it greatly improves the mounting point rigidity of the seat mounting point. At the same time, it increases the support capacity for the entire front and rear floors and improves the overall performance.

[0040] As Figure 1 and Figure 2 shown, the first mounting plane 1, as the connection plane with the floor, symmetrically has bosses 11 on the surface connected to the floor. A first mounting hole 12 is opened at the middle position of the boss 11. The added boss 11 structure improves the rigidity of the first mounting hole 12 at this place. As Figure 3 shown, fourth mounting holes 61 and third mounting holes 51 are respectively provided on the front floor 6 and the rear floor 5 for mating with the first mounting hole 12. During assembly, the first mounting hole 12 is respectively aligned with the fourth mounting hole 61 and the third mounting hole 51, and then they are connected by bolts. The top surface of the boss 11 is a flat structure for supporting the floor. The area of the boss 11 on the first mounting plane 1 is greater than two - thirds of the area of the first mounting plane 1, ensuring sufficient support area with the bottom surface of the floor.

[0041] Specifically, as Figure 4 shown, the front - floor reinforcing bracket 7 is connected to the front floor 6 through the first mounting hole 12 in a bolt - connection form; similarly, the rear - floor reinforcing bracket 8 is also connected to the rear floor 5 through the first mounting hole 12 in a bolt - connection manner.

[0042] In a preferred example, at the middle position of the first mounting plane 1, a set of bosses 11 is provided. The length of the bosses is the same as the length of the first mounting plane 1, and the first mounting holes 12 are opened at both ends of the boss 11.

[0043] As Figure 1 and Figure 2 shown, flanges 4 are integrally provided inwardly at the edges of the first mounting plane 1 and the support structure 2. The provided flanges 4 ensure that the edge of the support plane has sufficient rigidity and strength and is not easily bent, thus improving the support strength of the bracket.

[0044] The support structure 2 area between the boss 11 and the second mounting plane 3 forms a groove inward or a protrusion outward. The inward or outward design is based on the actual situation. For example, in this embodiment, the front floor reinforcement bracket 7 forms a groove inward, while the rear floor reinforcement bracket 8 forms a protrusion outward. By setting the groove or protrusion structure, the stiffness and strength of the support structure 2 are improved, which is beneficial to enhancing the support capacity of the reinforcement bracket.

[0045] Each support structure 2 is provided with an integral through-rib structure, which is a whole reinforcing rib structure with a cross-sectional difference provided on the support structure 2 in this embodiment, improving its support capacity.

[0046] On the basis of meeting the performance requirements, each support structure 2 is provided with at least one weight-reducing hole 21, which conforms to the lightweight design. As Figure 1 and Figure 2 shown, the weight-reducing hole 21 is provided at the groove or protrusion at the middle position of the support structure 2. The weight-reducing hole 21 is an oblong hole, and its length direction is the same as the length direction of the support structure 2.

[0047] Since the reinforcement bracket is in a "U" shape and there is a channel between the two support structures 2, the space for wiring harness arrangement is formed inside the two support structures 2, improving the regularity of the internal space. At the same time, the support structure 2 can also limit the wiring harness, reducing the risk of wiring harness jitter.

[0048] Each second mounting plane 3 is provided with at least one second mounting hole 31. In this embodiment, the front floor reinforcement bracket 7 is provided with one second mounting hole 31, while the rear floor reinforcement bracket 8 is provided with two second mounting holes 31. The two second mounting holes 31 on the rear floor reinforcement bracket 8 are arranged close to the end of the second mounting plane 3 on the second mounting plane 3.

[0049] As Figure 5 shown, the integral body casting 9 of the vehicle body is provided with support legs 91. The support legs 91 have high strength and stiffness, so as to achieve the purpose of improving the stability of the reinforcement bracket and further enhancing the support performance of the floor. The support legs 91 are provided with mounting holes that cooperate with the second mounting holes 31, and the connection between the second mounting plane 3 and the integral body casting 9 of the vehicle body is realized by means of bolt connection. It can be understood that for each bracket, two groups of support legs 91 are correspondingly provided.

[0050] The reinforcement bracket structure is connected to the floor and the integral body casting 9 of the vehicle body by bolt connection. The floor is connected to the seat crossbeam, increasing the transmission path at the seat crossbeam and enhancing the support capacity, thus solving the problem of insufficient stiffness at the seat mounting point.

[0051] Multiple reinforcement bracket structures are connected to the floor and the integral body casting 9 of the vehicle body by bolt connection, forming an assembled structure, as Figure 6 shown.

[0052] Example 2

[0053] This embodiment provides a method for using the integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to Embodiment 1, including the following steps:

[0054] A one-piece cast lower body floor reinforcement bracket suitable for the front floor 6 and rear floor 5 of an electric vehicle is designed. The support position and the number of bolt mounting points are determined based on the simulation analysis results of the seat mounting point stiffness. After the structural design is completed according to the analysis, it is assembled between the floor and the one-piece cast lower body 9 with bolts. Among them, after the boss 11 on the first mounting plane 1 is bolted to the floor, a weld point connection is added to the plane of the boss 11 to strengthen the connection with the front and rear floors.

[0055] The combination of welded and bolted connections ensures the stability of the reinforced bracket installation while preventing subsequent issues such as abnormal noise.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A floor reinforcement bracket for an integrated casting of the lower body of an electric vehicle, characterized in that, It includes a first mounting plane for connecting to the floor, a second mounting plane for connecting to the integral cast lower body, and two support structures disposed between the two; the two support structures are symmetrically disposed on both sides of the first mounting plane, and the second mounting plane is disposed on the outer edge of the bottom end of the support structure. A channel is provided between the two support structures; the interior of the two support structures forms a space for the wiring harness to be arranged; the integrated lower body casting is provided with support legs; the support legs are provided with mounting holes that mate with the second mounting holes; the connection between the second mounting plane and the integrated lower body casting is achieved by bolt connection; each bracket is provided with two sets of support legs. The first mounting plane has symmetrical bosses on the side connected to the floor, and the bosses have first mounting holes; the support structure area between the bosses and the second mounting plane forms a groove inward or a protrusion outward.

2. The integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to claim 1, characterized in that, The first mounting plane, the second mounting plane, and the supporting structure are an integral structure formed by stamping sheet metal.

3. The integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to claim 2, characterized in that, The edges of the first mounting plane and the supporting structure are provided with an integral inward flange.

4. The integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to claim 2, characterized in that, Each of the aforementioned support structures is provided with at least one weight-reducing hole.

5. The integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to claim 2, characterized in that, Each of the aforementioned support structures is equipped with an integral through-rib structure.

6. The integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to claim 1, characterized in that, Each side of the second mounting plane has at least one second mounting hole.

7. The method of using the integrated casting floor reinforcement bracket for the lower body of an electric vehicle according to any one of claims 1-6, characterized in that, Includes the following steps: Design separate integrated casting floor reinforcement brackets for the front and rear floors of electric vehicles. The support positions and the number of bolt mounting points are determined based on the simulation analysis results of the seat mounting point stiffness. After the structural design is completed according to the analysis, the brackets are assembled between the floor and the integrated casting lower body using bolts.

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