A high-strength sheet metal structure

Abstract

This utility model discloses a high-strength sheet metal structure, relating to the field of sheet metal structure technology, including a base plate, a reinforcing frame, and connecting components. The base plate has outwardly extending first and second flanges on its two side edges, forming a receiving groove between the first and second flanges. The reinforcing frame is installed within the receiving groove and fixed to the base plate via the connecting components. The reinforcing frame consists of multiple cross-arranged support bars, with adjacent support bars interconnected by a snap-fit ​​structure. The connecting components include multiple evenly distributed locking members, one end of which passes through the base plate and abuts against the outer surface of the support bar, while the other end is fixed to the inner surface of the base plate via a threaded structure. This utility model provides a high-strength sheet metal structure that, through the cross-arrangement design of the reinforcing frame, enables multi-directional force transmission within the base plate, effectively improving overall rigidity and impact resistance.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal structure technology, specifically to a high-strength sheet metal structure. Background Technology

[0002] With the increasing demands for structural strength and lightweighting in the automotive and machinery manufacturing industries, sheet metal structures are being used more and more widely in various equipment and vehicles. High-strength sheet metal structures, as core components bearing critical mechanical properties, directly affect the safety, durability, and performance of the overall product. However, existing sheet metal structures still have certain limitations in improving overall stiffness and impact resistance, especially under dynamic loads and complex stress distribution environments, where they are prone to problems such as localized deformation, weld cracking, or structural instability.

[0003] A search revealed a sheet metal structure and an automobile with publication number CN113200091B, published on August 9, 2022. This patent proposes setting a first and second support unit on the side panel, extending in different directions to the C-pillar and D-pillar of the vehicle body, respectively, to disperse and export the force transmitted by the shock absorber, thereby improving the dynamic stiffness of the side panel area. This structure solves the problem of decreased side panel stiffness after eliminating the C-ring structure by constructing support units with stiffness higher than the side panel itself. However, this solution mainly relies on the arrangement of local reinforcing units, and its overall structure is still mainly based on traditional stamped sheet metal splicing, without strengthening the connection interface between sheet metal parts. Under long-term vibration or impact loads, stress concentration may occur in the connection area between the support unit and the side panel, leading to fatigue cracking. Furthermore, this structure is highly dependent on the design of thickness and layout, posing a challenge to further improve the overall bending and torsional resistance without increasing weight.

[0004] A search revealed a static stiffness reinforcement structure for the inner sheet metal of a vehicle door, with publication number CN113978215B and publication date February 2, 2024. This technology significantly improves the static stiffness of the door by setting horizontal, vertical, and peripheral reinforcing ribs on the inner sheet metal of the door, forming a multi-directional intersecting rib network, effectively suppressing vibration noise when closing the door, and improving NVH performance. This structure achieves uniform force transmission through the rational distribution of reinforcing rib paths. However, it mainly focuses on improving static stiffness, with limited improvement in resistance to deformation under dynamic impact or uneven loading conditions. Furthermore, the reinforcing ribs in this solution are mostly planar bending structures, lacking spatial three-dimensional support, which may lead to buckling deformation in localized areas under asymmetrical external forces. In addition, this structure does not fully consider the strength matching problem of sheet metal connection nodes, and the weld points between the reinforcing ribs and the base plate may become weak points under repeated stress.

[0005] The aforementioned problems indicate that existing sheet metal structure technologies mostly focus on localized reinforcement or single-directional stiffness enhancement, lacking a systematic design for optimizing the overall structural force flow path, matching connection strength, and spatial load-bearing capacity. Especially in applications requiring high strength and durability, existing structures remain inadequate in terms of fatigue resistance, impact resistance, and multi-directional load-bearing capacity. Therefore, there is an urgent need for a new type of high-strength sheet metal structure that can achieve comprehensive stiffness enhancement, improved connection reliability, and optimized stress distribution without significantly increasing weight, in order to meet the demands of modern industry for high-performance sheet metal structures. Utility Model Content

[0006] This utility model provides a high-strength sheet metal structure to solve the problems of local deformation, weld cracking, or structural instability that easily occur in existing sheet metal structures under dynamic loads and complex stress distribution environments. The specific solution is as follows:

[0007] A high-strength sheet metal structure includes a base plate, a reinforcing frame, and a connecting assembly. The base plate has outwardly extending first and second flanges on its two side edges, forming a receiving groove between them. The reinforcing frame is installed within the receiving groove and fixed to the base plate via the connecting assembly. The reinforcing frame consists of multiple cross-arranged support bars, with adjacent support bars interconnected via a snap-fit ​​structure. The connecting assembly includes multiple evenly distributed locking elements, one end of which passes through the base plate and abuts against the outer surface of the support bar, while the other end is fixed to the inner surface of the base plate via a threaded structure. The cross-arrangement of the reinforcing frame allows for multi-directional force transmission within the base plate.

[0008] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the inner surface of the substrate is provided with a plurality of guide grooves arranged along its length direction, and the cross-section of the guide grooves is arc-shaped; the bottom of the guide grooves is provided with through holes penetrating the substrate, and the position of the through holes corresponds to the distribution position of the locking components; the top of the guide grooves is provided with expansion grooves communicating with them, the width of the expansion grooves is greater than the width of the guide grooves, and the inner wall of the expansion grooves is provided with a plurality of spaced protrusions.

[0009] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the outer surface of the support strip of the reinforcing frame is provided with a plurality of recesses extending along its length direction, the depth of the recesses being less than the thickness of the support strip; the bottom of the recesses is provided with a plurality of spaced positioning holes, the diameter of the positioning holes matching the diameter of the locking member; both ends of the support strip are respectively provided with a connector and a connector, the shape of the connector matching the shape of the connector, and the connector is fixed by a snap-fit ​​structure after being inserted into the connector.

[0010] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the locking component of the connecting assembly includes a main rod and a locking cap. One end of the main rod is provided with a threaded section, and the other end is provided with a smooth section connected to the threaded section. The locking cap is sleeved on the smooth section of the main rod and is connected to the end of the threaded section of the main rod through an elastic element. The outer surface of the locking cap is provided with a plurality of anti-slip patterns arranged at intervals, and the anti-slip patterns extend along the circumferential direction of the locking cap.

[0011] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the outer surface of the substrate is provided with a plurality of reinforcing ribs arranged along its width direction, the height of the reinforcing ribs being less than the thickness of the substrate; the top of the reinforcing ribs is provided with an extension plate parallel to it, the two ends of the extension plate being respectively attached to the inner surfaces of the first flange and the second flange; the bottom of the reinforcing ribs is provided with a plurality of spaced damping grooves, the cross-section of the damping grooves being trapezoidal.

[0012] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the inner surface of the support strip of the reinforcing frame is provided with a plurality of buffer blocks arranged along its length direction, and the buffer blocks are cylindrical in shape; the top of the buffer block is provided with a limiting ring arranged coaxially therewith, and the diameter of the limiting ring is larger than the diameter of the buffer block; the bottom of the buffer block is provided with a plurality of protrusions arranged at intervals, and the height of the protrusions is smaller than the height of the buffer block.

[0013] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the outer surfaces of the first flange and the second flange of the substrate are respectively provided with a plurality of fixing holes arranged along their length direction, the diameter of the fixing holes matching the diameter of the locking member; the inner walls of the fixing holes are provided with a plurality of spaced protrusions, the cross-section of the protrusions being triangular; the inner surfaces of the first flange and the second flange are respectively provided with a plurality of limiting grooves arranged along their length direction, the width of the limiting grooves matching the width of the reinforcing rib.

[0014] As a preferred embodiment of the high-strength sheet metal structure of this utility model, wherein: an auxiliary support column is provided at the intersection of the support bars of the reinforcing frame, which is arranged perpendicularly to the support bars, and the two ends of the auxiliary support column are respectively fixed to the inner surface of the support bars; a through groove is provided in the middle of the auxiliary support column, which has a rectangular cross-section; and a plurality of heat sinks are provided on the outer surface of the auxiliary support column, which are arranged along its length, and the thickness of the heat sinks is less than the thickness of the auxiliary support column.

[0015] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the inner surface of the substrate is provided with a plurality of connecting blocks arranged along its width direction, and the shape of the connecting blocks is cuboid; the top of the connecting blocks is provided with a mounting plate parallel to it, and the two ends of the mounting plate are respectively attached to the inner wall of the guide channel; the bottom of the connecting blocks is provided with a plurality of positioning grooves arranged at intervals, and the width of the positioning grooves matches the width of the support strip.

[0016] As a preferred embodiment of the high-strength sheet metal structure of this utility model, the inner walls of the connectors and interfaces of the supporting strips of the reinforcing frame are respectively provided with a plurality of sealing strips arranged along their length direction, and the cross-section of the sealing strips is semi-circular; a protective layer is provided on the top of the sealing strips and arranged coaxially therewith, the thickness of the protective layer being less than the thickness of the sealing strips; the outer surfaces of the connectors and interfaces are respectively provided with a plurality of guide grooves arranged along their length direction, and the width of the guide grooves is matched with the width of the snap-fit ​​structure.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. By strengthening the cross-arrangement design of the frame, the force flow can be transmitted in multiple directions inside the substrate, which effectively improves the overall rigidity and impact resistance.

[0019] 2. The design of the flow channels and expansion channels on the inner surface of the substrate can optimize stress distribution, reduce local stress concentration, and thus reduce the risk of fatigue cracking.

[0020] 3. The recessed part and positioning hole design of the support bar enhances the fixing effect of the connecting components and improves the stability of the reinforced frame.

[0021] 4. The design of reinforcing ribs and extension plates further improves the bending resistance of the substrate, while the damping grooves can absorb some of the impact energy under dynamic loads.

[0022] 5. The design of auxiliary support columns and heat sinks not only enhances the load-bearing capacity of the support bars, but also improves the heat dissipation performance of the structure and extends its service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is an overall schematic diagram of the high-strength sheet metal structure of this utility model.

[0025] Figure 2This is a detailed view of the support strip connection of the reinforcing frame of this utility model.

[0026] Figure 3 This is a partial enlarged view of the inner side of the substrate of this utility model.

[0027] Figure 4 This is an exploded view of the locking component of the connecting assembly of this utility model.

[0028] Figure 5 This is a schematic diagram showing the cooperation between the auxiliary support column and the support strip of this utility model.

[0029] The attached figures are labeled as follows:

[0030] 1. Substrate; 2. Reinforcing frame; 3. Connecting assembly; 4. First flange; 5. Second flange; 6. Support bar; 7. Snap-fit ​​structure; 8. Locking element; 9. Guide channel; 10. Expansion slot; 11. Through hole; 12. Recess; 13. Positioning hole; 14. Connector; 15. Plug interface; 16. Main rod; 17. Locking cap; 18. Elastic element; 19. Anti-slip texture; 20. Reinforcing rib; 21. Extension plate; 22. Shock-absorbing groove; 23. Buffer block; 24. Auxiliary support column; 25. Heat sink. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] This utility model provides a high-strength sheet metal structure, the specific implementation of which is as follows: Figures 1 to 5 A detailed description is provided. The high-strength sheet metal structure includes a base plate 1, a reinforcing frame 2, and a connecting assembly 3. The base plate 1 has outwardly extending first flanges 4 and second flanges 5 on its two side edges, forming a receiving groove between the first flanges 4 and second flanges 5. The reinforcing frame 2 is installed within this receiving groove and fixed to the base plate 1 by the connecting assembly 3. The reinforcing frame 2 consists of multiple cross-arranged support bars 6, with adjacent support bars 6 interconnected by a snap-fit ​​structure 7. The connecting assembly 3 includes multiple evenly distributed locking elements 8. One end of each locking element 8 passes through the base plate 1 and abuts against the outer surface of the support bar 6, while the other end is fixed to the inner surface of the base plate 1 by a threaded structure.

[0033] The inner surface of the substrate 1 has multiple guide grooves 9 arranged along its length. The cross-section of the guide grooves 9 is arc-shaped. The bottom of the guide grooves 9 has through holes 11 penetrating the substrate 1, and the position of the through holes 11 corresponds to the distribution position of the locking members 8. The top of the guide grooves 9 has an expansion groove 10 communicating with them. The width of the expansion groove 10 is greater than the width of the guide grooves 9, and the inner wall of the expansion groove 10 has multiple protrusions arranged at intervals. The outer surface of the support bar 6 of the reinforcing frame 2 has multiple recesses 12 extending along its length. The depth of the recesses 12 is less than the thickness of the support bar 6. The bottom of the recesses 12 has multiple positioning holes 13 arranged at intervals. The diameter of the positioning holes 13 matches the diameter of the locking members 8. The two ends of the support bar 6 are respectively provided with a connector 14 and a connector 15. The shape of the connector 14 is adapted to the shape of the connector 15, and the connector 14 is fixed by the snap-fit ​​structure 7 after being inserted into the connector 15.

[0034] The locking component 8 of the connecting assembly 3 includes a main body rod 16 and a locking cap 17. One end of the main body rod 16 has a threaded section, and the other end has a smooth section connected to the threaded section. The locking cap 17 is fitted onto the smooth section of the main body rod 16 and is connected to the end of the threaded section of the main body rod 16 through an elastic element 18. The outer surface of the locking cap 17 has a plurality of spaced anti-slip textures 19, which extend along the circumferential direction of the locking cap 17. The outer surface of the base plate 1 has a plurality of reinforcing ribs 20 arranged along its width direction, and the height of the reinforcing ribs 20 is less than the thickness of the base plate 1. The top of the reinforcing rib 20 has an extension plate 21 parallel to it, and the two ends of the extension plate 21 are respectively attached to the inner surfaces of the first flange 4 and the second flange 5. The bottom of the reinforcing rib 20 has a plurality of spaced damping grooves 22, and the cross-section of the damping grooves 22 is trapezoidal.

[0035] The inner surface of the support bar 6 of the reinforcing frame 2 is provided with multiple buffer blocks 23 arranged along its length, and the buffer blocks 23 are cylindrical in shape. A limiting ring is coaxially arranged at the top of each buffer block 23, and the diameter of the limiting ring is larger than the diameter of the buffer block 23. Multiple spaced protrusions are provided at the bottom of each buffer block 23, and the height of the protrusions is less than the height of the buffer block 23. The outer surfaces of the first flange 4 and the second flange 5 of the substrate 1 are respectively provided with multiple fixing holes arranged along their length, and the diameter of the fixing holes matches the diameter of the locking member 8. The inner walls of the fixing holes are provided with multiple spaced protrusions, and the cross-section of the protrusions is triangular. The inner surfaces of the first flange 4 and the second flange 5 are respectively provided with multiple limiting grooves arranged along their length, and the width of the limiting grooves matches the width of the reinforcing rib 20.

[0036] At the intersection of the support bars 6 of the reinforcing frame 2, auxiliary support columns 24 are provided perpendicularly to them, with both ends of the auxiliary support columns 24 fixed to the inner surface of the support bars 6. A through groove penetrating the axis of the auxiliary support column 24 is provided in the middle of the auxiliary support column 24, and the cross-section of the through groove is rectangular. Multiple heat sinks 25 are arranged along the length of the auxiliary support column 24 on its outer surface, and the thickness of the heat sinks 25 is less than the thickness of the auxiliary support column 24. Multiple connecting blocks are arranged along the width of the substrate 1 on its inner surface, and the connecting blocks are cuboid in shape. A mounting plate parallel to the top of each connecting block is provided, and both ends of the mounting plate are respectively attached to the inner wall of the guide channel 9. Multiple positioning grooves are provided at intervals at the bottom of the connecting blocks, and the width of the positioning grooves matches the width of the support bars 6.

[0037] The inner walls of the connectors 14 and 15 of the support bars 6 of the reinforcing frame 2 are provided with multiple sealing strips arranged along their length, and the cross-section of the sealing strips is semi-circular. A protective layer is provided on the top of the sealing strip, coaxially arranged with it, and the thickness of the protective layer is less than the thickness of the sealing strip. The outer surfaces of the connectors 14 and 15 are provided with multiple guide grooves arranged along their length, and the width of the guide grooves matches the width of the snap-fit ​​structure 7. In practical applications, the substrate 1, as the main load-bearing component, is connected to other structural components through the first flange 4 and the second flange 5. The fixing holes on the first flange 4 and the second flange 5 are used to install the locking element 8 to achieve a fixed connection between the substrate 1 and the external structure. The reinforcing frame 2, through the cross-arrangement design of the support bars 6, distributes the force flow to different areas of the substrate 1, thereby improving the overall rigidity. The snap-fit ​​structure 7 between the support bars 6 ensures the assembly stability of the reinforcing frame 2, while the design of the connectors 14 and 15 facilitates the quick connection and disassembly of the support bars 6.

[0038] The locking member 8 passes through the through hole 11 on the substrate 1 via the main rod 16 and is fixed in the positioning hole 13 of the support bar 6. The locking cap 17 is tightly fitted to the inner surface of the substrate 1 by the action of the elastic element 18, realizing a firm connection between the substrate 1 and the reinforcing frame 2. The design of the guide groove 9 and the expansion groove 10 optimizes the stress distribution inside the substrate 1 and reduces local stress concentration. The protrusion in the expansion groove 10 further enhances the deformation resistance of the substrate 1. The design of the reinforcing rib 20 and the extension plate 21 improves the bending resistance of the substrate 1. The damping groove 22 can absorb some impact energy under dynamic loads and reduce the risk of fatigue cracking. The design of the buffer block 23 and the limiting ring enables the support bar 6 to produce a certain buffering effect when subjected to pressure. At the same time, the limiting ring restricts the excessive compression of the buffer block 23 and ensures the stability of the support bar 6.

[0039] The auxiliary support column 24 is fixed to the inner surface of the support bar 6 at both ends, further enhancing the overall rigidity of the reinforcing frame 2. The heat sink 25 on the auxiliary support column 24 improves the heat dissipation performance of the structure and extends its service life. The design of the connecting block and mounting plate makes the connection between the base plate 1 and the reinforcing frame 2 tighter, and the cooperation between the positioning groove and the support bar 6 ensures the accurate positioning of the reinforcing frame 2. The design of the sealing strip and protective layer improves the sealing between the connector 14 and the interface 15, preventing external impurities from entering the connection part, while the design of the guide groove facilitates the quick installation and disassembly of the snap-fit ​​structure 7.

[0040] In the actual assembly process, the support bar 6 is first connected to form the reinforcing frame 2 via the connector 14 and the interface 15, and then fixed using the snap-fit ​​structure 7. Next, the reinforcing frame 2 is placed in the receiving groove of the substrate 1, aligning the positioning hole 13 of the support bar 6 with the through hole 11 on the substrate 1. Then, the main body rod 16 of the locking member 8 is passed through the through hole 11 and fixed in the positioning hole 13. By rotating the locking cap 17, it is made to fit tightly against the inner surface of the substrate 1, completing the connection between the substrate 1 and the reinforcing frame 2. Finally, the entire structure is fixedly connected to other structural components through the fixing holes on the first flange 4 and the second flange 5, completing the assembly of the high-strength sheet metal structure.

[0041] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0042] In the actual assembly process, the support bar 6 is first connected to form the reinforcing frame 2 via the connector 14 and the interface 15, and then fixed using the snap-fit ​​structure 7. The mating design of the connector 14 and the interface 15 ensures rapid assembly between the support bars 6, while the presence of the guide groove allows the snap-fit ​​structure 7 to slide in and lock smoothly, thus avoiding loosening of the connection due to improper manual operation. The design of the sealing strip and protective layer further improves the sealing performance of the connection part, preventing external impurities from entering the connection area and extending the service life of the connection part.

[0043] Next, the reinforcing frame 2 is placed in the receiving groove formed between the first flange 4 and the second flange 5 of the substrate 1. At this time, the positioning hole 13 on the support bar 6 needs to be aligned with the through hole 11 at the bottom of the guide channel 9 on the inner surface of the substrate 1. This alignment process is completed visually or with the aid of positioning tools to ensure that the locking member 8 can pass smoothly through the through hole 11 and be fixed in the positioning hole 13. The arc-shaped cross-section design of the guide channel 9 helps to disperse local stress, while the protrusions in the expansion groove 10 further enhance the deformation resistance of the substrate 1, making the substrate 1 less prone to buckling deformation when subjected to complex stress distribution.

[0044] Subsequently, the main rod 16 of the locking member 8 is passed through the through hole 11 on the base plate 1 and fixed in the positioning hole 13 of the support bar 6 by the threaded section. The locking cap 17 is tightly fitted to the inner surface of the base plate 1 by the action of the elastic element 18, forming a firm connection. The anti-slip texture 19 on the outer side of the locking cap 17 increases the friction when tightening, making it easier for the operator to apply torque. At the same time, the elastic effect of the elastic element 18 can compensate for small displacements caused by vibration or impact loads, thereby improving the reliability of the connection.

[0045] The design of the reinforcing rib 20 and the extension plate 21 on the outer surface of the substrate 1 significantly improves the overall bending resistance of the substrate 1. The damping groove 22 at the bottom of the reinforcing rib 20 can absorb part of the impact energy under dynamic loads, reducing the risk of fatigue cracking. At the same time, the limiting grooves on the first flange 4 and the second flange 5 match the width of the reinforcing rib 20, ensuring that the reinforcing rib 20 will not shift during installation, thereby further enhancing the stability of the structure.

[0046] The buffer blocks 23 on the inner surface of the support bars 6 of the reinforced frame 2 provide a certain buffering effect when subjected to pressure, while the design of the limiting ring effectively limits the excessive compression of the buffer blocks 23, ensuring the stability of the support bars 6 under dynamic working conditions. The auxiliary support columns 24 at the intersections of the support bars 6 are fixed to the inner surface of the support bars 6 at both ends, further enhancing the overall rigidity of the reinforced frame 2. The through-slot design in the middle of the auxiliary support column 24 not only reduces the structural weight but also improves heat dissipation performance. The presence of heat sinks 25 effectively dissipates heat generated by long-term vibration or impact loads, thereby extending the service life of the entire structure.

[0047] Finally, the entire high-strength sheet metal structure is fixedly connected to other structural components through the fixing holes on the first flange 4 and the second flange 5. The triangular ridge design on the inner wall of the fixing hole increases the friction between the locking component 8 and the fixing hole, preventing loosening due to repeated loads. In addition, the design of the connecting block and the mounting plate makes the connection between the base plate 1 and the reinforcing frame 2 tighter, and the cooperation between the positioning groove and the support strip 6 ensures the accurate positioning of the reinforcing frame 2, thereby further improving the load-bearing capacity and deformation resistance of the overall structure.

[0048] Through the above steps, the high-strength sheet metal structure of this utility model is fully assembled and exhibits excellent performance in practical applications. The coordinated design of the base plate 1, the reinforcing frame 2, and the connecting components 3 enables multi-directional force transmission within the structure, optimizes stress distribution, and reduces the occurrence of local stress concentration. Simultaneously, the tight connections and rational layout between the components effectively improve the overall rigidity, impact resistance, and durability of the structure, meeting the demands of modern industry for high-performance sheet metal structures.

[0049] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-strength sheet metal structure, comprising a base plate (1), a reinforcing frame (2), and connecting components (3), characterized in that: The two sides of the substrate (1) are respectively provided with an outwardly extending first flange (4) and second flange (5), and a receiving groove is formed between the first flange (4) and the second flange (5); the reinforcing frame (2) is installed in the receiving groove and fixed to the substrate (1) by the connecting component (3); the reinforcing frame (2) is composed of multiple cross-arranged support bars (6), and adjacent support bars (6) are connected to each other by a snap-fit ​​structure (7); the connecting component (3) includes multiple evenly distributed locking members (8), one end of the locking member (8) passes through the substrate (1) and is attached to the outer surface of the support bar (6), and the other end is fixed to the inner surface of the substrate (1) by a threaded structure.

2. The high-strength sheet metal structure according to claim 1, characterized in that, The inner surface of the substrate (1) is provided with a plurality of guide grooves (9) arranged along its length direction. The cross-section of the guide grooves (9) is arc-shaped. The bottom of the guide grooves (9) is provided with through holes (11) penetrating the substrate (1). The position of the through holes (11) corresponds to the distribution position of the locking members (8). The top of the guide grooves (9) is provided with an expansion groove (10) communicating with it. The width of the expansion groove (10) is greater than the width of the guide grooves (9), and the inner wall of the expansion groove (10) is provided with a plurality of spaced protrusions.

3. The high-strength sheet metal structure according to claim 1, characterized in that, The outer surface of the support bar (6) of the reinforcing frame (2) is provided with a plurality of recesses (12) extending along its length direction. The depth of the recesses (12) is less than the thickness of the support bar (6). The bottom of the recesses (12) is provided with a plurality of spaced positioning holes (13). The diameter of the positioning holes (13) matches the diameter of the locking member (8). The two ends of the support bar (6) are respectively provided with a plug (14) and a plug interface (15). The shape of the plug (14) matches the shape of the plug interface (15). After the plug (14) is inserted into the plug interface (15), it is fixed by a buckle structure (7).

4. A high-strength sheet metal structure according to claim 1, characterized in that, The locking member (8) of the connecting assembly (3) includes a main rod (16) and a locking cap (17). One end of the main rod (16) is provided with a threaded section, and the other end is provided with a smooth section connected to the threaded section. The locking cap (17) is sleeved on the smooth section of the main rod (16) and is connected to the end of the threaded section of the main rod (16) through an elastic element (18). The outer surface of the locking cap (17) is provided with a plurality of anti-slip patterns (19) arranged at intervals, and the anti-slip patterns (19) extend along the circumferential direction of the locking cap (17).

5. A high-strength sheet metal structure according to claim 1, characterized in that, The outer surface of the substrate (1) is provided with a plurality of reinforcing ribs (20) arranged along its width direction. The height of the reinforcing ribs (20) is less than the thickness of the substrate (1). The top of the reinforcing ribs (20) is provided with an extension plate (21) parallel to it. The two ends of the extension plate (21) are respectively attached to the inner surfaces of the first flange (4) and the second flange (5). The bottom of the reinforcing ribs (20) is provided with a plurality of spaced damping grooves (22). The cross-section of the damping grooves (22) is trapezoidal.

6. A high-strength sheet metal structure according to claim 1, characterized in that, The inner surface of the support bar (6) of the reinforcing frame (2) is provided with a plurality of buffer blocks (23) arranged along its length direction. The buffer blocks (23) are cylindrical in shape. The top of the buffer block (23) is provided with a limiting ring arranged coaxially with it. The diameter of the limiting ring is larger than the diameter of the buffer block (23). The bottom of the buffer block (23) is provided with a plurality of protrusions arranged at intervals. The height of the protrusions is smaller than the height of the buffer block (23).

7. A high-strength sheet metal structure according to claim 1, characterized in that, The outer surfaces of the first flange (4) and the second flange (5) of the substrate (1) are provided with a plurality of fixing holes arranged along their length direction, and the diameter of the fixing holes matches the diameter of the locking member (8); the inner walls of the fixing holes are provided with a plurality of spaced protrusions, and the cross-section of the protrusions is triangular; the inner surfaces of the first flange (4) and the second flange (5) are provided with a plurality of limiting grooves arranged along their length direction, and the width of the limiting grooves matches the width of the reinforcing rib (20).

8. A high-strength sheet metal structure according to claim 1, characterized in that, At the intersection of the support bars (6) of the reinforcing frame (2), there is an auxiliary support column (24) arranged perpendicular to it. The two ends of the auxiliary support column (24) are fixed to the inner surface of the support bar (6). The middle part of the auxiliary support column (24) is provided with a through groove that runs through its axis. The cross-section of the through groove is rectangular. The outer surface of the auxiliary support column (24) is provided with a plurality of heat sinks (25) arranged along its length. The thickness of the heat sinks (25) is less than the thickness of the auxiliary support column (24).

9. A high-strength sheet metal structure according to claim 1, characterized in that, The inner surface of the substrate (1) is provided with a plurality of connecting blocks arranged along its width direction. The shape of the connecting blocks is cuboid. The top of the connecting blocks is provided with a mounting plate parallel to it. The two ends of the mounting plate are respectively attached to the inner wall of the guide groove (9). The bottom of the connecting blocks is provided with a plurality of positioning grooves arranged at intervals. The width of the positioning grooves matches the width of the support strip (6).

10. A high-strength sheet metal structure according to claim 1, characterized in that, The inner walls of the connector (14) and the interface (15) of the support bar (6) of the reinforcing frame (2) are provided with multiple sealing strips arranged along their length direction. The cross-section of the sealing strip is semi-circular. The top of the sealing strip is provided with a protective layer arranged coaxially with it. The thickness of the protective layer is less than the thickness of the sealing strip. The outer surfaces of the connector (14) and the interface (15) are provided with multiple guide grooves arranged along their length direction. The width of the guide groove matches the width of the snap-fit ​​structure (7).

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