A high-strength steel sheet structure for an automobile having delayed cracking

Abstract

The utility model relates to the technical field of steel plate for automobile, especially a high -strength steel plate structure of delayed cracking for automobile, including steel plate main part and reinforcing plate, be provided with connecting mechanism between steel plate main part and reinforcing plate, and connecting mechanism includes operation board, the top fixed connection of operation board has the threaded tube, the inside screw thread connection of threaded tube has screw rod, the top fixed connection of screw rod has rotary cover, the inside of steel plate main part is provided with thread hole, the outside fixed connection of steel plate main part has mounting panel, the surface of reinforcing plate is provided with anticorrosive coating, the inside of reinforcing plate is provided with openwork groove, and reinforcing plate is located the top of steel plate main body, in the utility model, can realize the stable connection of steel plate main body and reinforcing plate, rotates rotary cover and can drive screw rod to rotate in threaded tube and thread hole, convenient operation, convenient installation and post maintenance, and the design of symmetrical distribution further improves the stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of automotive steel sheet technology, specifically to a high-strength steel sheet structure for automotive applications with delayed cracking. Background Technology

[0002] As the global automotive industry rapidly develops towards lightweight, high safety, and low energy consumption, high-strength steel has become a core material for lightweight vehicle body structure and improved collision safety due to its excellent mechanical properties. However, the delayed cracking problem faced by high-strength steel in automobile manufacturing and service has become a core bottleneck restricting its further application.

[0003] Delayed cracking (also known as hydrogen-induced delayed fracture) refers to the phenomenon where, under static or cyclic stress below the yield strength, hydrogen atoms diffuse and accumulate in stress concentration areas (such as weld heat-affected zones, work-hardened areas, and inclusion interfaces), gradually forming microcracks and propagating, eventually leading to brittle fracture without warning. To solve this problem, a reinforcing plate is usually welded to the outside of the steel plate to form a main body, thereby reducing the occurrence of cracking.

[0004] Welding is generally used to connect steel plates and reinforcing plates. While this provides a certain degree of stability, stress concentration can easily occur during the welding process. This can lead to cracking of the steel plates due to vibration and impact during long-term use. Furthermore, the welded structure is difficult to maintain and disassemble. If a problem occurs, the entire structure often needs to be replaced, increasing maintenance costs and difficulty. In the rare cases where bolts are used for connection, the unreasonable design of the bolts (i.e., when vibration occurs, the force will directly impact the bolts) can cause instability in the connection between the reinforcing plate and the steel plate during vehicle operation.

[0005] Therefore, a high-strength steel plate structure with delayed cracking for automobiles is proposed to address the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a high-strength steel plate structure for automobiles with delayed cracking, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-strength steel plate structure for automobiles with delayed cracking includes a steel plate body and a reinforcing plate, wherein a connecting mechanism is provided between the steel plate body and the reinforcing plate.

[0009] The connecting mechanism includes a rotating plate, a threaded tube fixedly connected to the top of the rotating plate, a screw threadedly connected to the inside of the threaded tube, a rotating cover fixedly connected to the top of the screw, and a threaded hole opened inside the steel plate body.

[0010] As a further optimization of this utility model, the steel plate body is fixedly connected to an installation plate on its outer side, the surface of the reinforcing plate is provided with an anti-corrosion coating, and the interior of the reinforcing plate is provided with a hollow groove.

[0011] As a further optimization of this utility model, the reinforcing plate is located above the main body of the steel plate and the two are in contact with each other, and the operating plate is fixed and symmetrically distributed on the top of the reinforcing plate.

[0012] As a further optimization of this utility model, the threaded tube is fixedly connected to the top of the rotating plate, and the interior of the rotating plate is hollow.

[0013] As a further optimization of this utility model, the screw is connected to the inside of the threaded tube via a rotating cover threaded connection, and the screw passes through the inside of the operating plate.

[0014] As a further optimization of this utility model, the threaded holes are symmetrically distributed inside the steel plate body, and the screw is adapted to the threaded holes.

[0015] As a further optimization of this utility model, the mounting plates are symmetrically distributed on the outer side of the steel plate body, and the hollowed-out grooves are evenly distributed inside the reinforcing plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this utility model, a connection mechanism consisting of a rotating plate, a threaded tube, a screw, a rotating cover, and a threaded hole can achieve a stable connection between the steel plate body and the reinforcing plate. Rotating the rotating cover can drive the screw to rotate within the threaded tube and threaded hole, making operation convenient, installation easy, and subsequent maintenance easy. At the same time, the symmetrical distribution design further enhances the stability of the connection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure between the steel plate body and the reinforcing plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the outer side of the reinforcing plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the outer side of the steel plate body of this utility model;

[0022] Figure 5 This is a schematic diagram of the outer side of the connecting mechanism of this utility model;

[0023] Figure 6 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0024] In the diagram: 1. Steel plate body; 11. Mounting plate; 2. Reinforcing plate; 21. Anti-corrosion coating; 22. Hollowed-out groove; 3. Connecting mechanism; 31. Rotating plate; 32. Threaded pipe; 33. Screw; 34. Rotating cover; 35. Threaded hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Please see Figures 1-6 This utility model provides a technical solution:

[0028] A high-strength steel plate structure for automobiles with delayed cracking includes a steel plate body 1 and a reinforcing plate 2, and a connecting mechanism 3 is provided between the steel plate body 1 and the reinforcing plate 2.

[0029] The connecting mechanism 3 includes a rotating plate 31, a threaded tube 32 is fixedly connected to the top of the rotating plate 31, a screw 33 is threadedly connected inside the threaded tube 32, a rotating cover 34 is fixedly connected to the top of the screw 33, and a threaded hole 35 is opened inside the steel plate body 1.

[0030] Furthermore: the reinforcing plate 2 is located above the steel plate body 1 and the two are attached to each other. The rotating plate 31 is fixed and symmetrically distributed on the top of the reinforcing plate 2. The threaded tube 32 is fixedly connected to the top of the rotating plate 31, and the interior of the rotating plate 31 is hollow. The screw 33 is threadedly connected to the interior of the threaded tube 32 through the rotating cover 34, and the screw 33 passes through the interior of the rotating plate 31. The threaded holes 35 are symmetrically distributed inside the steel plate body 1, and the screw 33 and the threaded holes 35 are matched.

[0031] It should be noted that: reinforcing ribs are added at the connection between the threaded tube 32 and the rotating plate 31 to enhance the firmness of the connection and prevent the threaded tube 32 from loosening due to vibration and other factors after long-term use. At the same time, the rotating cover 34 can be designed to be foldable, which can be folded up when not in use to reduce space occupation, especially suitable for parts with limited interior space in automobiles. In addition, a wear-resistant coating can be applied to the surface of the screw 33 to improve its wear resistance and extend its service life.

[0032] Meanwhile, for the reinforcing plate 2, in addition to the existing anti-corrosion coating 21, a composite coating technology is also adopted, such as adding a wear-resistant coating on top of the anti-corrosion coating 21, so that the reinforcing plate 2 has both anti-corrosion and wear-resistant properties. It is suitable for parts of the car that are prone to friction and corrosion during driving, such as the chassis. The hollow groove 22 design of the reinforcing plate 2 can effectively reduce weight and help improve the driving range of new energy vehicles. At the same time, its delayed cracking characteristics can ensure the safety of the new energy vehicle body structure, especially in key parts such as around the battery pack, and can reduce the safety hazards caused by structural cracking.

[0033] Furthermore, the interior of the operating plate 31 is hollow, and the threaded tube 32 is fixedly connected to the top of the operating plate 31. This design makes the operating plate 31 not a solid rigid structure, but rather forms a certain "elastic deformation space". When the screw 33 is connected to the threaded hole 35 of the steel plate body 1 through the threaded tube 32, the dynamic loads such as vibration and impact during vehicle operation will be transmitted to the operating plate 31 through the threaded tube. At the same time, the hollow design reduces the weight of the operating plate 31, reducing the additional load of its own weight on the connection point. This allows the threaded tube 32 to only bear the contact pressure between the steel plate body 1 and the reinforcing plate 2, further ensuring the consistency of the force direction (perpendicular to the plate surface) and avoiding uneven local force due to force direction deviation.

[0034] As a further implementation of this scheme, an installation plate 11 is fixedly connected to the outer side of the steel plate body 1, an anti-corrosion coating 21 is provided on the surface of the reinforcing plate 2, and a hollow groove 22 is opened inside the reinforcing plate 2.

[0035] Furthermore, the mounting plates 11 are symmetrically distributed on the outer side of the steel plate body 1, and the hollow grooves 22 are evenly distributed inside the reinforcing plate 2.

[0036] It should be noted that multiple mounting holes of different sizes are provided on the mounting plate 11 to adapt to the installation requirements of different car models and enhance the versatility of the structure.

[0037] Workflow: In terms of structural connection, the connecting mechanism 3 is the core for achieving a stable connection between the steel plate body 1 and the reinforcing plate 2. The reinforcing plate 2 is located above the steel plate body 1 and fits against each other. The rotating plate 31 is fixed and symmetrically distributed on the top of the reinforcing plate 2, providing a stable support base for the connection. The threaded tube 32 is fixed on the top of the rotating plate 31, and the interior of the rotating plate 31 is hollow. When the screw 33 is rotated through the rotating cover 34, the screw 33 can move axially within the threaded tube 32 due to its threaded connection with the threaded tube 32. At the same time, the screw 33 passes through the interior of the rotating plate 31 and can finally be precisely screwed into the symmetrically distributed threaded holes 35 inside the steel plate body 1. The screw 33 and the threaded holes 35 are matched. Through this threaded connection method, the friction and locking force between the threads are used to tightly fix the reinforcing plate 2 to the steel plate body 1, achieving a reliable connection between the two. The symmetrical distribution design can make the force uniform and further improve the stability of the connection. This connection method replaces welding, thus facilitating the replacement of the reinforcing plate 2.

[0038] In terms of performance assurance, the presence of reinforcing plate 2 directly enhances the overall structural strength. When the steel plate is subjected to external force, reinforcing plate 2 can share part of the load, reduce stress concentration on the main body of the steel plate 1, thereby delaying the occurrence of cracking and extending service life. The anti-corrosion coating 21 on the surface of reinforcing plate 2 forms a protective barrier, which can isolate external moisture, oxygen, corrosive media and other substances from contact with the body of reinforcing plate 2, avoid or slow down the corrosion of reinforcing plate 2, and ensure the long-term stability of its strength performance. At the same time, the uniformly distributed hollow grooves 22 inside reinforcing plate 2 reduce the amount of material used and reduce the overall weight without significantly reducing the structural strength, which meets the requirements of automotive lightweighting. Moreover, the hollow structure will not have a significant negative impact on the load-bearing performance of reinforcing plate 2, ensuring that it can still effectively play a reinforcing role while reducing weight.

[0039] In terms of installation and application, the mounting plates 11 symmetrically distributed on the outer side of the main steel plate 1 provide a convenient interface for the installation of this structure on automobiles. During installation, the entire high-strength steel plate structure can be connected and fixed to other parts of the automobile through the mounting plates 11. The symmetrical distribution design can balance the force during the installation process, facilitate accurate positioning and stable installation, and improve installation efficiency.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength steel sheet structure for an automobile with delayed cracking, comprising a steel sheet main body (1) and a reinforcing plate (2), characterized by: The connecting mechanism (3) is arranged between the steel plate body (1) and the reinforcing plate (2); The connecting mechanism (3) comprises a running plate (31), a threaded pipe (32) is fixedly connected to the top of the running plate (31), a screw rod (33) is screw-connected in the threaded pipe (32), a rotating cover (34) is fixedly connected to the top of the screw rod (33), and a threaded hole (35) is formed in the steel plate body (1).

2. The high-strength steel sheet structure for a vehicle with delayed cracking according to claim 1, characterized by: The outer side of the steel plate body (1) is fixedly connected with a mounting plate (11), the surface of the reinforcing plate (2) is provided with an anti-corrosion coating (21), and the inside of the reinforcing plate (2) is provided with a hollow groove (22).

3. The high-strength steel sheet structure for a vehicle with delayed cracking according to claim 1, characterized by: The reinforcing plate (2) is located above the steel plate body (1) and is attached to the steel plate body (1), and the running plate (31) is fixedly and symmetrically arranged on the top of the reinforcing plate (2).

4. The high-strength steel sheet structure for a vehicle with delayed cracking according to claim 1, characterized by: The threaded pipe (32) is fixedly connected to the top of the running plate (31), and the inside of the running plate (31) is hollow.

5. The high-strength steel sheet structure for a vehicle with delayed cracking according to claim 1, characterized by: The screw rod (33) is screw-connected in the threaded pipe (32) through the rotating cover (34), and the screw rod (33) penetrates through the inside of the running plate (31).

6. The high-strength steel sheet structure for a vehicle with delayed cracking according to claim 1, characterized by: The threaded holes (35) are symmetrically arranged in the inside of the steel plate body (1), and the screw rod (33) is matched with the threaded holes (35).

7. The high-strength steel sheet structure for a delayed cracking automobile according to claim 2, characterized by: The mounting plates (11) are symmetrically arranged on the outer side of the steel plate body (1), and the hollow grooves (22) are uniformly arranged in the inside of the reinforcing plate (2).

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