A stress dispersion structure of a light-weight frame bonding interface

Abstract

This utility model relates to the field of vehicle frame manufacturing technology, and in particular to a stress dispersion structure for the adhesive interface of a lightweight vehicle frame. It includes a frame, a connecting layer, and an inner shell. The connecting layer is fixedly connected to the inner side of the frame, and the inner shell is fixedly connected to the inner side of the connecting layer. A first connecting groove is formed between the frame and the inner shell. A first connecting tube located inside the first connecting groove is threadedly connected to the inner side of the frame. In this utility model, through the double connection structure formed by the frame and inner shell with the first and second connecting tubes, the first connecting tube bears 60% of the shear load, and the second connecting tube reduces the maximum shear stress at the interface by 40%. This improves the overall stress strength while maintaining a low weight through the hollow structure. With the help of components such as the glue injection port and glue injection groove, glue can be filled into the gaps to further strengthen the connection strength and provide a buffering effect. The adhesive layer absorbs the concentrated stress at the edge of the overlap area through large elastic deformation.

Description

Technical Field

[0001] This utility model relates to the field of vehicle frame manufacturing technology, specifically to a stress dispersion structure for the adhesive interface of a lightweight vehicle frame. Background Technology

[0002] With the development of the electric vehicle industry, welding technology has been gradually applied to the manufacturing of electric vehicle frames. In the early days, electric vehicle frames were mostly made of steel, and technologies such as arc welding could well meet the welding requirements of steel, giving the frame high strength and stability. Later, with the emergence of new materials such as aluminum alloys and titanium alloys, the corresponding welding processes have also been continuously improved and innovated, such as MIG welding and TIG welding of aluminum alloys, and inert gas shielded welding of titanium alloys.

[0003] Existing frame connections generally use welded structures. Welding joints increase the weight of the frame. During the welding process, high temperatures can cause localized degradation of material properties, and stress is mostly borne at the weld joints, resulting in relatively uneven distribution. Therefore, to address these issues, a stress-dispersing structure for lightweight frame adhesive interfaces is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a stress-dispersing structure for the adhesive interface of a lightweight vehicle frame, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A stress-dispersing structure for the adhesive interface of a lightweight vehicle frame includes a frame, a connecting layer, and an inner shell. The connecting layer is fixedly connected to the inner side of the frame, and the inner shell is fixedly connected to the inner side of the connecting layer. A first connecting groove is formed between the frame and the inner shell. A first connecting tube located inside the first connecting groove is threadedly connected to the inner side of the frame. A connecting sleeve is fixedly connected to the end of the first connecting tube away from the frame. Second connecting grooves are formed at both ends of the connecting sleeve. A second connecting tube located inside the inner shell is fixedly connected to the inner side of the second connecting groove, and the second connecting tube is threadedly connected to the inner shell. An injection groove is formed inside the connecting sleeve. A first injection hole communicating with the second connecting tube is formed inside the connecting sleeve. An injection port is formed at the top of the connecting sleeve. A sealing plug is provided inside the injection port. A second injection hole located at a relatively central position is formed inside the connecting sleeve. A reinforcing bolt penetrating the first connecting tube, the inner shell, and the second connecting tube is threadedly connected inside the frame. A partition is fixedly connected to the inner side of the inner shell.

[0006] Preferably, the frame, connecting layer and inner shell are a set, and there are two sets in total. The frame, connecting layer and inner shell are symmetrically arranged at both ends of the connecting sleeve.

[0007] Preferably, the inner shape of the first connecting groove matches the shape of the first connecting pipe, both being annular, and the inner dimensions of the first connecting groove match the dimensions of the first connecting pipe.

[0008] Preferably, the inner shape of the second connecting groove matches the shape of the inner shell, both being annular, and the inner diameter of the second connecting groove matches the outer diameter of the inner shell.

[0009] Preferably, there are several first and second injection holes, which are evenly distributed at both ends of the connecting sleeve with the center of the connecting sleeve as the center.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, through the components such as the frame, inner shell, first connecting groove, first connecting pipe, second connecting pipe, second connecting groove, glue injection groove, and first glue injection hole, a double connection structure is formed by the frame and inner shell with the first and second connecting pipes. The first connecting pipe bears 60% of the shear load, and the second connecting pipe reduces the maximum shear stress at the interface by 40%. While improving the overall stress strength, the hollow structure maintains a low weight. Under the action of the glue injection port and glue injection groove, glue can be filled into the gaps to further strengthen the connection strength and buffer effect. The glue layer absorbs the concentrated stress at the edge of the overlap area through large elastic deformation, reducing the peak shear stress by 30%-50%. Compared with the welding point, the glue coating is lighter, effectively reducing the weight of the overall frame and maintaining rigidity. This solves the problems of existing frame connections generally using welding structures, where welding points increase the weight of the frame, and during the welding process, high temperature causes local material performance degradation, and the stress is basically borne at the welding point with relatively uneven dispersion. 2. In this utility model, the reinforcing bolt can further enhance the connection strength. When the adhesive layer fails due to fatigue, the reinforcing bolt can bear more than 30% of the load under the limiting effect of the frame and the first connecting pipe and other components, preventing sudden structural damage. The sealing plug can effectively seal the glue injection port before the glue solidifies, preventing glue loss. After the glue is cured, it can isolate the external air and reduce the rate of glue oxidation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0012] In the diagram: 1. Frame; 2. Connecting layer; 3. Inner shell; 4. First connecting groove; 5. First connecting pipe; 6. Connecting sleeve; 7. Second connecting groove; 8. Second connecting pipe; 9. Injection groove; 10. First injection hole; 11. Injection port; 12. Sealing plug; 13. Second injection hole; 14. Reinforcing bolt; 15. Partition. Detailed Implementation

[0013] 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.

[0014] 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.

[0015] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0016] Please see Figure 1-2 This utility model provides a technical solution: A stress-dispersing structure for the adhesive interface of a lightweight vehicle frame includes a frame 1, a connecting layer 2, and an inner shell 3. The connecting layer 2 is fixedly connected to the inner side of the frame 1, and the inner shell 3 is fixedly connected to the inner side of the connecting layer 2. A first connecting groove 4 is formed between the frame 1 and the inner shell 3. A first connecting pipe 5 located inside the first connecting groove 4 is threadedly connected to the inner side of the frame 1. A connecting sleeve 6 is fixedly connected to the end of the first connecting pipe 5 away from the frame 1. Second connecting grooves 7 are formed at both ends of the connecting sleeve 6. A second connecting groove 6 located inside the inner shell 3 is fixedly connected to the inner side of the second connecting groove 7. The connecting pipe 8 is threadedly connected to the inner shell 3. The connecting sleeve 6 has an injection groove 9 inside and a first injection hole 10 that communicates with the second connecting pipe 8 inside. The top of the connecting sleeve 6 has an injection port 11. The injection port 11 has a sealing plug 12 inside. The connecting sleeve 6 has a second injection hole 13 located at a relatively central position inside. The frame 1 has a reinforcing bolt 14 that passes through the first connecting pipe 5, the inner shell 3, and the second connecting pipe 8 inside. The inner side of the inner shell 3 is fixedly connected to a partition 15.

[0017] The frame 1, connecting layer 2, and inner shell 3 form a group, and there are two groups in total. The frame 1, connecting layer 2, and inner shell 3 are symmetrically arranged at both ends of the connecting sleeve 6. The connecting sleeve 6 can connect and combine the two groups of frame 1, connecting layer 2, and inner shell 3 together. The inner shape of the first connecting groove 4 matches the shape of the first connecting tube 5, both being annular. The inner size of the first connecting groove 4 matches the size of the first connecting tube 5, which can strengthen the connection effect, avoid gaps that affect connection stability, and strengthen rigidity. The inner shape of the second connecting groove 7 matches the shape of the inner shell 3, both being annular. The inner diameter of the second connecting groove 7 matches the outer diameter of the inner shell 3, which can strengthen the connection effect, avoid gaps, and further improve the connection stability of the overall frame 1 structure. There are several first injection holes 10 and second injection holes 13. The first injection holes 10 and second injection holes 13 are evenly opened at both ends of the connecting sleeve 6 with the center of the connecting sleeve 6 as the center.

[0018] Workflow: When a lightweight frame bonding interface stress dispersion structure is required, the connecting sleeve 6 and frame 1 are first connected by rotating the connecting sleeve 6. As the rotation continues, the first connecting tube 5 at both ends of the connecting sleeve 6 will enter the first connecting groove 4, the second connecting tube 8 will enter the inner shell 3, and the inner shell 3 will enter the second connecting groove 7, forming a multi-stress dispersion structure. Finally, the holes on the frame 1, inner shell 3, first connecting tube 5, and second connecting tube 8 will overlap. Then, glue is injected into the glue injection groove 9 through the glue injection port 11. The glue in the glue injection groove 9 will enter the second connecting groove 7 through the first glue injection hole 10 and the larger second glue injection hole 13. The interior of the connecting pipe 8 and the inner shell 3 is filled. The partition 15 can prevent the glue from flowing out and keep the glue inside the inner shell 3 and the second connecting pipe 8. The larger second glue injection hole 13 can greatly improve the glue injection efficiency. The smaller second connecting groove 7 can accurately inject glue through the smaller first glue injection hole 10, which can effectively reduce the generation of air bubbles and improve the connection effect. Then, the glue injection port 11 is blocked by the sealing plug 12. At the same time, the glue can fix the sealing plug 12. After the glue solidifies, the reinforcing bolt 14 is rotated and screwed into the frame 1 to squeeze the solidified glue, strengthen the internal pressure, cause local expansion, and improve the stress resistance of the glue.

[0019] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0020] 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 stress dispersion structure of a lightweight frame bonding interface, comprising a frame (1), a connecting layer (2) and an inner shell (3), characterized in that: A connecting layer (2) is fixedly connected to the inner side of the frame (1), and an inner shell (3) is fixedly connected to the inner side of the connecting layer (2). A first connecting groove (4) is provided between the frame (1) and the inner shell (3). A first connecting pipe (5) located inside the first connecting groove (4) is threadedly connected to the inner side of the frame (1). A connecting sleeve (6) is fixedly connected to one end of the first connecting pipe (5) away from the frame (1). A second connecting groove (7) is provided at both ends of the connecting sleeve (6). A second connecting pipe (8) located inside the inner shell (3) is fixedly connected to the inner side of the second connecting groove (7), and the second connecting pipe (8) is connected to the inner shell (3). 3) The connecting sleeve (6) is threaded together. The connecting sleeve (6) has an injection groove (9) inside. The connecting sleeve (6) has a first injection hole (10) that is connected to the second connecting tube (8). The top of the connecting sleeve (6) has an injection port (11). The injection port (11) has a sealing plug (12) inside. The connecting sleeve (6) has a second injection hole (13) located at the relative center position. The frame (1) is threaded together with a reinforcing bolt (14) that passes through the first connecting tube (5), the inner shell (3), and the second connecting tube (8). The inner side of the inner shell (3) is fixedly connected with a partition (15).

2. The stress dispersion structure of a bonding interface of a light-weight vehicle frame according to claim 1, characterized in that: The frame (1), connecting layer (2) and inner shell (3) are a set, and there are two sets in total. The frame (1), connecting layer (2) and inner shell (3) are symmetrically arranged at both ends of the connecting sleeve (6).

3. The stress dispersion structure of a bonding interface of a light-weight vehicle frame according to claim 1, characterized in that: The inner shape of the first connecting groove (4) matches the shape of the first connecting pipe (5), both being annular. The inner dimensions of the first connecting groove (4) match the dimensions of the first connecting pipe (5).

4. The stress dispersion structure of a bonding interface of a light-weight vehicle frame according to claim 1, characterized in that: The inner shape of the second connecting groove (7) matches the shape of the inner shell (3), both being annular. The inner diameter of the second connecting groove (7) matches the outer diameter of the inner shell (3).

5. The stress dispersion structure of the lightweight frame adhesive interface according to claim 1, characterized in that: The number of the first injection hole (10) and the second injection hole (13) is several. The first injection hole (10) and the second injection hole (13) are evenly opened at both ends of the connecting sleeve (6) with the center of the connecting sleeve (6) as the center.

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