A connection assembly and a dissimilar material connection structure

Abstract

The application discloses a connecting assembly and a dissimilar material connecting structure, which are used for connecting first and second structural members with different materials to solve the problem of welding difficulty caused by welding a nut on the first structural member to complete the connection of the first and second structural members; the connecting assembly comprises a nut and a clamping member used for clamping the first structural member; the nut is used for connecting the second structural member and is detachably connected with the clamping member; wherein the clamping member is provided with a first assembly surface used for contacting the first structural member and a second assembly surface used for contacting the nut, the first assembly surface is of non-metal material or the same material as the first structural member, and the second assembly surface is of non-metal material or the same material as the nut. The connecting assembly provided by the application can complete the connection of the first and second structural members without welding; meanwhile, potential corrosion does not occur between the first and second structural members; assembly is simpler, efficiency is higher, and the requirement for operation space is low.

Description

Technical Field

[0001] This invention belongs to the field of connection component technology, specifically relating to a connection component and a dissimilar material connection structure. Background Technology

[0002] A car's energy consumption is closely related to its total mass. While maintaining or even optimizing the overall quality, performance, and cost of the vehicle, reducing its weight can increase output power, reduce noise, improve handling and reliability, increase speed, reduce energy consumption, and enhance safety. Research data shows that a 10% reduction in vehicle weight reduces braking distance by 5%, steering force by 6%, and improves driving stability. Therefore, a lighter vehicle body significantly benefits overall energy economy, vehicle control stability, and collision safety. Currently, the main measure for lightweighting automobiles is to replace some steel structures with lightweight materials such as magnesium alloys and aluminum alloys. With the increasing use of magnesium and aluminum alloys, there are numerous scenarios requiring connections between these materials and steel structures. If the connections are made of magnesium or aluminum alloys, the connectors and steel structures are dissimilar materials, making welding difficult and resulting in low yield rates. If the connectors are made of steel, it will affect the lightweighting process. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a connecting component and a dissimilar material connecting structure, which avoids the problem of galvanic corrosion and the welding difficulties and low yield caused by traditional welding of connecting nuts to magnesium alloy or aluminum alloy first structural components. It can also be used in space-constrained assembly locations, making assembly simpler and more efficient.

[0004] The technical solution of this invention is as follows:

[0005] On one hand, the present invention provides a connecting assembly for connecting a first structural member and a second structural member made of different materials, the connecting assembly comprising:

[0006] A locking component is used to engage with the first structural member and is provided with a receiving cavity;

[0007] A nut for connection with the second structural member and detachably connected with the clip, the nut being at least partially located in the receiving cavity;

[0008] The card has a first mounting surface for contacting the first structural member and a second mounting surface for contacting the nut. The first mounting surface is made of a non-metallic material or the same material as the first structural member, and the second mounting surface is made of a non-metallic material or the same material as the nut.

[0009] Furthermore, the card includes:

[0010] The sleeve is provided with the receiving cavity and the second mounting surface;

[0011] A retaining plate is used to engage with the retaining slot of the first structural component. The retaining plate is connected to the retaining sleeve and protrudes from the retaining sleeve. The side of the retaining plate near the retaining sleeve forms the first mounting surface.

[0012] Furthermore, the outer wall of the sleeve is provided with two rotating grooves that penetrate the outer wall and communicate with the receiving groove along the radial direction. The card plate is provided with mounting holes that communicate with the two rotating grooves. The nut has two nut wings that are arranged radially opposite each other. Along the radial direction of the nut, the distance between the outer peripheries of the two nut wings is greater than the size of the receiving cavity. The two nut wings are respectively movably extended into the two rotating grooves.

[0013] Furthermore, the outer wall of the sleeve is provided with a limiting part, which is located on the groove wall of the rotating groove. When the nut wing moves to the bottom of the rotating groove, the limiting part contacts the nut wing.

[0014] Furthermore, the outer periphery of the sleeve near the end of the card plate is provided with locking teeth for abutting against the locking slot of the first structural member.

[0015] Furthermore, the outer periphery of the end of the sleeve away from the card plate is provided with two protrusions along the radial direction of the sleeve for abutting against the nut wing, and the groove wall of the rotating groove and the surface of the protrusion that contacts the nut wing form the second mounting surface.

[0016] Furthermore, the ferrule includes a reinforcing rod, and the sidewall of the ferrule wraps around the reinforcing rod.

[0017] Furthermore, there are multiple reinforcing rods, which are parallel to each other and distributed at intervals along the circumference of the sleeve.

[0018] On the other hand, the present invention provides a dissimilar material connection structure, including the above-mentioned connection component, the first structural member and the second structural member, wherein the locking member of the connection component is engaged with the first structural member so that the first mounting surface of the locking member contacts the first structural member, and the nut of the connection component is screwed into the second structural member so that the nut contacts the second mounting surface of the locking member.

[0019] Furthermore, the card is interference-fitted with the first structural component.

[0020] The beneficial effects of the present invention include at least the following:

[0021] The connecting assembly provided by this invention is used to connect a first structural member and a second structural member made of different materials. The connecting assembly includes a clamp and a nut. The clamp is used to engage with the first structural member and has a receiving cavity. The nut is used to connect with the second structural member, and the nut and the clamp are detachably connected. The nut is at least partially located in the receiving cavity. The clamp has a first mounting surface for contacting the first structural member and a second mounting surface for contacting the nut. The first mounting surface is made of a non-metallic material or the same material as the first structural member, and the second mounting surface is also made of a non-metallic material or the same material as the nut. The first structural member can be made of a non-steel material, such as a magnesium alloy or aluminum alloy, or other materials different from the second structural member. The second structural member can be a steel structural member, such as a steel plate, or other materials different from the first structural member. During connection, the nut can be first placed into the receiving cavity of the clamp to connect with the clamp, then the clamp can be connected to the first structural member, and finally the nut can be connected to the second structural member, thus completing the connection between the first and second structural members. Since the first mounting surface of the card that contacts the first structural component is made of a non-metallic material or the same material as the first structural component, there will be no potential corrosion between the card and the first structural component. Similarly, the second mounting surface of the nut that contacts the second structural component is made of a non-metallic material or the same material as the nut, so there will be no potential corrosion between the nut and the second structural component. The material options for the first and second mounting surfaces of the card itself are: the first mounting surface is a non-metallic material, and the second mounting surface is a non-metallic material; or, the first mounting surface is a non-metallic material, and the second mounting surface is steel (using steel as an example); or, the first mounting surface is aluminum alloy (using aluminum alloy as an example), and the second mounting surface is a non-metallic material. Therefore, the card itself will not experience potential corrosion. As can be seen from the above, there will be no potential corrosion between the card and the first structural component, no potential corrosion between the nut and the second structural component, and no potential corrosion between the card itself. Therefore, there will be no potential corrosion between the first and second structural components. Compared to the connection method of adding a spacer between the connecting nut and the first structural component to prevent corrosion, this connection assembly is simpler to assemble and more efficient. It also avoids the welding difficulties and low yield rates associated with traditional methods of welding the connecting nut to the magnesium alloy or aluminum alloy first structural component. Furthermore, this connection assembly solves the problem of limited operating space due to the position of the first structural component, which prevents the completion of fastening assembly work. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an assembly structure of the connecting component, the first structural component, and the second structural component in this embodiment.

[0023] Figure 2 for Figure 1 A schematic diagram of the connection components.

[0024] Figure 3 for Figure 1 A structural diagram of the connecting components from another angle.

[0025] Figure 4 for Figure 2 A bottom view.

[0026] Figure 5 This is a schematic diagram of the nut structure.

[0027] Figure 6 for Figure 1 A schematic diagram of another assembly of the nut connection assembly with the first structural member and the second structural member.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Card, 11-Card sleeve, 111-Rotating groove, 112-Card tooth, 113-Protrusion, 114-Limiting part, 12-Card plate, 121-Mounting hole;

[0030] 2-Nut, 21-Nut Wing;

[0031] 3-First structural component;

[0032] 4-Second structural component;

[0033] 5- Bolt. Detailed Implementation

[0034] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Using magnesium or aluminum alloys for parts is an effective way to achieve automotive lightweighting. Currently, this is generally done by welding nuts onto magnesium or aluminum alloy parts, and then using the nuts to connect the magnesium or aluminum alloy parts to other steel structural components. Due to the influence of dissimilar materials, directly welding steel nuts onto magnesium or aluminum alloy parts is difficult and has a low yield rate, which greatly restricts production efficiency and cost, thus affecting automotive lightweighting. Currently, the welding process is often improved to enhance the welding effect. Furthermore, it has been found that directly welding nuts onto magnesium or aluminum alloy parts can cause galvanic corrosion due to the large potential difference between lightweight metals such as magnesium and aluminum and steel, severely affecting the service life of parts or structures. Currently, this problem is often addressed by adding insulating plates, but adding insulating plates increases processing and assembly steps, impacting production efficiency.

[0036] Figures 1 to 6 The structure of the connecting component is shown, combined with Figures 1 to 6This invention provides a connecting assembly for connecting a first structural member 3 and a second structural member 4 made of different materials. The connecting assembly includes a clip 1 and a nut 2. The clip 1 is used to engage with the first structural member 3 and has a receiving cavity. The nut 2 is used to connect with the second structural member 4, and the nut 2 is detachably connected to the clip 1. The nut 2 is at least partially located in the receiving cavity. The clip 1 has a first mounting surface for contacting the first structural member 3 and a second mounting surface for contacting the nut 2. The first mounting surface is made of a non-metallic material or the same material as the first structural member 3, and the second mounting surface is made of a non-metallic material or the same material as the nut 2.

[0037] The first structural component 3 can be made of non-steel materials, such as magnesium alloy or aluminum alloy, or other materials different from the second structural component 4. The second structural component 4 can be a steel structural component, such as a steel plate, or other materials different from the first structural component 3. During connection, the nut 2 can be first placed into the receiving cavity of the clamp 1 to connect the nut 2 to the clamp 1, then the clamp 1 can be connected to the first structural component 3, and finally the nut 2 can be connected to the second structural component 4. This completes the connection between the first structural component 3 and the second structural component 4. The connection between the second structural component 4 and the nut 2 can be completed by bolt 5. Holes can be drilled on the second structural component 4, and the bolt 5 passes through the holes in the second structural component 4, then through the clamp 11, and connects to the nut 2. Since the first mounting surface of the card 1 in contact with the first structural component 3 is made of a non-metallic material or the same material as the first structural component 3, there will be no potential corrosion between the card 1 and the first structural component 3. Similarly, the second mounting surface of the nut 2 in contact with the second structural component 4 is made of a non-metallic material or the same material as the nut 2. Therefore, there will be no potential corrosion between the nut 2 and the second structural component 4. The material options for the first and second mounting surfaces of the card 1 itself are: the first mounting surface is made of a non-metallic material, and the second mounting surface is made of a non-metallic material; or, the first mounting surface is made of a non-metallic material, and the second mounting surface is made of steel (using steel as an example); or, the first mounting surface is made of aluminum alloy (using aluminum alloy as an example), and the second mounting surface is made of a non-metallic material. Therefore, the card 1 itself will not experience potential corrosion. As can be seen from the above, there will be no potential corrosion between the card 1 and the first structural component 3, no potential corrosion between the nut 2 and the second structural component 4, and no potential corrosion between the card 1 itself. Therefore, there will be no potential corrosion between the first structural component 3 and the second structural component 4. Compared to the connection method of adding a spacer between the connecting nut 2 and the first structural component 3 to prevent corrosion, this connection assembly is simpler to assemble and more efficient. It also avoids the welding difficulties and low yield rates associated with traditional methods of welding the connecting nut 2 to the magnesium alloy or aluminum alloy first structural component 3. Furthermore, this connection assembly solves the problem of limited operating space due to the position of the first structural component 3, which prevents the completion of fastening assembly work. The aforementioned non-metallic material can be nylon 6, also known as PA6, polyamide 6, or nylon 6, a polymer compound with a low melting point. Other non-metallic materials include ceramic coatings, etc., which are not limited here.

[0038] Nut 2 can be a conventional steel nut 2. The first structural component 3 can be a front bulkhead, which is made of aluminum alloy. The second structural component 4 can be a mounting plate for the lower decorative panel of the windshield, or it can be a longitudinal beam, transverse beam, or other structure. The first structural component 3 can have an inner cavity, and the snap-fit ​​of the first structural component 3 is connected to the inner cavity to form a structure with a small opening and a large belly.

[0039] Furthermore, in this embodiment, the card 1 may include a card sleeve 11 and a card plate 12. The card sleeve 11 is provided with a receiving cavity and a second mounting surface. The card plate 12 is used to cooperate with the slot of the first structural member 3. The card plate 12 is connected to the card sleeve 11 and protrudes from the card sleeve 11. The side of the card plate 12 near the card sleeve 11 forms a first mounting surface.

[0040] The slot of the first structural member 3 can be rectangular, and the shape of the clamping plate 12 can also be rectangular. The edge of the clamping plate 12 extends out of the clamping sleeve 11. The length of the slot is greater than the length of the clamping plate 12 so that the clamping plate 12 can be inserted into the slot of the first structural member 3. The width of the slot is less than the length of the clamping plate 12. After the clamping plate 12 enters the slot of the first structural member 3, the clamping plate 12 is rotated so that the long side of the clamping plate 12 is parallel to the short side of the rectangular slot, and the short side of the rectangular slot is parallel to the long side of the rectangular slot, thereby making the clamping plate 12 engage with the first structural member 3. In other embodiments, the shape of the slot can also be elliptical or other shapes, as long as it ensures that the clamping plate 12 can enter the slot of the first structural member 3 and be locked after rotation. No limitation is made here.

[0041] Furthermore, in this embodiment, the outer wall of the sleeve 11 is provided with two radially opposite rotating grooves 111 that penetrate the outer wall and communicate with the receiving cavity. The clamping plate 12 is provided with mounting holes 121 that communicate with the two rotating grooves 111. The nut 2 has two radially opposite nut wings 21. Along the radial direction of the nut 2, the distance between the outer peripheries of the two nut wings 21 is greater than the size of the receiving cavity. The two nut wings 21 are respectively movably extended into the two rotating grooves 111. The rotation angle of the rotating groove 111 around the axial direction of the sleeve 11 can be set to 90°, 85°, or 75°, etc., to ensure the strength of the sleeve 11 while achieving the clamping of the nut 2. No limitation is made here. After the nut 2 is assembled into the sleeve 11, the two nut wings 21 extend out of the rotating grooves 111 of the sleeve 11. After connection, the nut wings 21 exert force on the groove wall of the rotating groove 111.

[0042] Furthermore, in this embodiment, the outer wall of the sleeve 11 is provided with a limiting part 114, which is located on the groove wall of the rotating groove 111. When the nut wing 21 moves to the bottom of the rotating groove 111, the limiting part 114 contacts the nut wing 21. This ensures that the nut wing 21 will not come off the sleeve 11 during the installation process, thereby improving the stability of the installation process and improving efficiency.

[0043] Furthermore, in this embodiment, the outer periphery of the sleeve 11 near the end of the card plate 12 is provided with a locking tooth 112 for abutting against the locking slot of the first structural member 3.

[0044] Furthermore, in this embodiment, the sleeve 11 is provided with a locking tooth 112 on the outer side near the locking plate 12. The locking tooth 112 of the sleeve 11 is used to press against the inner wall of the locking slot of the first structural member 3. After being selectively laser sintered from the non-metallic material, the locking tooth 112 has a certain degree of deformability and can produce slight elasticity. After the locking plate 12 is inserted into the locking slot of the first structural member 3, by rotating the sleeve 11, when the locking tooth 112 contacts the inner wall of the locking slot of the first structural member 3, a slight compression deformation is generated, so that the sleeve 11 is fixed on the first structural member 3. In this way, even if the locking slot of the first structural member 3 is facing upward, the sleeve 11 can be fixed on the first structural member 3, making the installation of the nut 2 and the second structural member 4 more convenient. The outer diameter of the locking tooth 112 should be smaller than the long side of the rectangular opening so that the locking tooth 112 can smoothly enter the locking slot of the first structural member 3. The outer diameter of the locking tooth 112 should be slightly larger than the minimum size of the locking slot so that when the sleeve 11 is engaged with the first structural member 3, the locking tooth 112 can deform and abut against the inner wall of the locking slot of the first structural member 3.

[0045] Furthermore, in this embodiment, the sleeve 11 is provided with locking teeth 112 on the outer side near the locking plate 12. The locking teeth 112 of the sleeve 11 are used to press against the inner wall of the locking slot of the first structural member 3. After the locking plate 12 extends into the locking slot of the first structural member 3, by rotating the sleeve 11, when the locking teeth 112 contact the inner wall of the locking slot of the first structural member 3, an interference fit is formed, so that the sleeve 11 is fixed on the first structural member 3. In this way, even if the locking slot of the first structural member 3 faces upward, the sleeve 11 can be fixed on the first structural member 3, making the installation of the nut 2 and the second structural member 4 more convenient. The outer diameter of the locking teeth 112 is smaller than the long side of the rectangular opening, so that the locking teeth 112 can smoothly enter the locking slot of the first structural member 3. The outer diameter of the locking teeth 112 is slightly larger than the minimum size of the locking slot, so that when the sleeve 11 is engaged with the first structural member 3, the locking teeth 112 can deform and press against the inner wall of the locking slot of the first structural member 3. The locking teeth 112 can have a certain degree of elasticity.

[0046] Furthermore, in this embodiment, the outer periphery of the end of the sleeve 11 away from the retaining plate 12 is provided with two protrusions 113 for abutting against the nut wing 21 along the radial direction of the sleeve 11. The groove wall of the rotating groove 111 and the surface of the protrusion 113 that contacts the nut wing 21 form a second mounting surface. That is, the nut wing 21 of the nut 2 can simultaneously abut against the groove wall of the rotating groove 111 and the protrusion 113 to complete the connection between the sleeve 11 and the nut 2. The provision of the protrusion 113 can improve the strength of the sleeve 11 and prevent it from breaking under the axial tensile force of the nut 2. As can be seen from the above, the limiting part 114 and the protrusion 113 form two axial limits for the nut 2, and the second limiting surface can be perpendicular to the axial direction of the sleeve 11.

[0047] Furthermore, in this embodiment, the steel frame may include multiple reinforcing rods 114, which can be arranged along the axial direction of the sleeve 11 and distributed circumferentially around the axial direction of the sleeve 11. Preferably, the multiple reinforcing rods 114 can be evenly distributed at intervals along the axial direction of the sleeve 11, and the multiple reinforcing rods 114 are parallel to each other. The reinforcing rods 114 can be made of steel, such as 20# steel. The reinforcing rods 114 arranged along the axial direction of the sleeve 11 can increase the axial strength of the connecting assembly and ensure the connection strength of the first structural member 3 and the second structural member 4. The reinforcing rods 114 can also be made of non-metallic high-strength materials, which is not limited here. The shape of the reinforcing rods 114 can be cylindrical or cuboid, which is also not limited here. The number of reinforcing rods 114 can be determined according to the size and strength of the sleeve 11. The more steel frames there are, the higher the strength of the sleeve 11, but it is not conducive to weight reduction; the fewer steel frames there are, the more the strength of the sleeve 11 will be affected. In addition, the reinforcing rod 114 is set along the axial direction to match the axial force. The length of the reinforcing rod 114 is adjusted according to the shape of the sleeve 11 and is not limited here.

[0048] Application examples of the above-mentioned connecting components include, but are not limited to, the following scenarios: connection between automotive refrigeration pipe bracket and longitudinal beam. The longitudinal beam has an inner cavity and an opening communicating with the inner cavity. However, the inner cavity space of the longitudinal beam is small, making it difficult to perform installation and disassembly operations. The clamping plate 12 of the connecting component can be inserted into the opening of the longitudinal beam, and the nut 2, which is clamped in the groove, can be fixedly connected to the refrigeration pipe bracket.

[0049] The assembly process of the above-mentioned connecting component is as follows: the nut 2 in the connecting component is inserted into the rotating groove 111 of the sleeve 11 through the mounting hole 121 of the clamping plate 12, and the two nut wings 21 of the nut 2 are engaged in the rotating groove 111 away from the groove wall of the clamping plate 12, thus completing the assembly of the nut 2 and the sleeve 11; the clamping plate 12 is engaged into the slot of the first structural component 3, thus completing the connection between the sleeve 11 and the first structural component 3; the nut 2 in the sleeve 11, which has been connected to the first structural component 3, is connected to the second structural component 4, thus completing the connection between the connecting component and the second structural component 4.

[0050] On the other hand, this embodiment also provides a dissimilar material connection structure, including the connection component 1, the first structural member 3 and the second structural member 4 as described above. The locking member 1 of the connection component is engaged with the first structural member 3 so that the first mounting surface of the locking member 1 contacts the first structural member 3. The nut 2 of the connection component is screwed with the second structural member 4 so that the nut 2 contacts the second mounting surface of the locking member 1.

[0051] The aforementioned dissimilar material connection structure can be a car frame, such as a mounting plate for fixing the lower windshield trim panel and the front bulkhead, wherein the mounting plate is made of steel and the front bulkhead is made of aluminum. Of course, it can also be other dissimilar material connection structures, which are not limited here.

[0052] Furthermore, in this embodiment, the locking member 1 of the connecting component can also be interference-fitted with the first structural member 3. Specifically, when the outer periphery of the sleeve 11 near the end of the locking plate 12 is provided with locking teeth 112, the locking plate 12 is located outside the first structural member 3 and contacts the second structural member 4. The end of the sleeve 11 away from the locking plate 12 is located in the slot of the first structural member 3. The locking teeth 112 on the outer periphery of the sleeve 11 are interference-fitted with the slot of the first structural member 3. The locking teeth 112 that contact the slot of the first structural member 3 form the first assembly surface. The nut 2 and the bolt 5 through the mounting hole 121 of the locking plate 12 are connected to the second structural member 4. At this time, the nut wing 21 contacts the limiting part 114, and the limiting part 114 forms the second assembly surface.

[0053] In the above embodiment, the assembly process of the connecting component, the first structural member 3, and the second structural member 4 is as follows: the nut 2 in the connecting component is inserted into the rotating groove 111 of the sleeve 11 through the mounting hole 121 of the clamping plate 12, and the two nut wings 21 of the nut 2 are made to contact the limiting part 114, thus completing the assembly of the nut 2 and the clamping member 1; then the end of the sleeve 11 away from the clamping plate 12 is inserted into the slot of the first structural member 3, and by rotating, the clamping teeth 112 are press-fitted with the slot of the first structural member 3, thus completing the assembly of the clamping member 1 and the first structural member 3; the shank of the bolt 5 is passed through the screw hole of the second structural member 4 and inserted into the nut 2 through the mounting hole 121 of the clamping plate 12, and the head of the bolt 5 is rotated so that the shank of the bolt 5 is connected to the nut 2, thus completing the assembly of the connecting component and the second structural member 4; thus, the assembly of the first structural member 3 and the second structural member 4 is completed by the connecting component.

[0054] This invention provides a connecting component and a dissimilar material connecting structure. Since the first assembly surface of the clip 1 in contact with the first structural member 3 is made of a non-metallic material or the same material as the first structural member 3, no potential corrosion occurs between the clip 1 and the first structural member 3. Similarly, the second assembly surface of the nut 2 in contact with the second structural member 4 is made of a non-metallic material or the same material as the nut 2. Therefore, no potential corrosion occurs between the nut 2 and the second structural member 4, and the clip 1 itself is also free from potential corrosion. Consequently, no potential corrosion occurs between the first structural member 3 and the second structural member 4. Compared to adding a spacer between the connecting nut 2 and the first structural member 3 to prevent corrosion, this connecting component is simpler to assemble and more efficient. It also avoids the welding difficulties and low yield rates associated with traditional welding of the connecting nut 2 to the magnesium alloy or aluminum alloy first structural member 3. Furthermore, this connecting component solves the problem of limited operating space due to the position of the first structural member 3, which prevents the completion of fastening assembly work.

[0055] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0056] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A connecting assembly for connecting a first structural member and a second structural member made of different materials, characterized in that, The connecting assembly comprises: a clamping member for clamping with the first structural member, the clamping member comprising a clamping sleeve and a clamping plate connected with each other, the clamping sleeve being provided with a receiving cavity and two rotating grooves in communication with the receiving cavity, the two rotating grooves penetrating through the outer wall of the clamping sleeve and oppositely arranged in the radial direction of the clamping sleeve, the outer periphery of the end of the clamping sleeve away from the clamping plate being oppositely provided with two protrusions in the radial direction of the clamping sleeve, the clamping plate being provided with mounting holes in communication with the two rotating grooves, the clamping plate protruding from the clamping sleeve, and the side of the clamping plate close to the clamping sleeve forming a first assembly surface for contacting the first structural member; a nut for connecting with the second structural member and detachably connected with the clamping member, the nut being at least partially located in the receiving cavity, the nut having two nut wings oppositely arranged in the radial direction of the nut, the outer periphery of the two nut wings being spaced apart by a distance greater than the size of the receiving cavity in the radial direction of the nut, and the two nut wings respectively movably extending into the two rotating grooves; wherein the groove wall of the rotating groove and the surface of the protrusion in contact with the nut wing form a second assembly surface, the nut wing of the nut abutting against the groove wall of the rotating groove and the protrusion, the first assembly surface being of a non-metal material or the same material as the first structural member, and the second assembly surface being of a non-metal material or the same material as the nut.

2. The connection assembly of claim 1, wherein, The outer wall of the clamping sleeve is provided with a limiting portion located on the groove wall of the rotating groove, the limiting portion being in contact with the nut wing when the nut wing moves to the groove bottom of the rotating groove.

3. The connection assembly of claim 1, wherein, The outer periphery of the end of the clamping sleeve close to the clamping plate is provided with a clamping tooth for abutting against the clamping port of the first structural member.

4. The connection assembly according to any one of claims 1-3, characterized in that The clamping sleeve comprises a reinforcing rod, and the side wall of the clamping sleeve wraps the reinforcing rod.

5. The connection assembly of claim 4, wherein, The reinforcing rod is provided in a plurality, and the plurality of reinforcing rods are parallel to each other and spaced apart in the circumferential direction of the clamping sleeve.

6. A dissimilar material joining structure characterized by comprising: The connecting assembly, the first structural member and the second structural member are provided, the clamping member of the connecting assembly is clamped with the first structural member so that the first assembly surface of the clamping member is in contact with the first structural member, and the nut of the connecting assembly is screwed with the second structural member so that the nut is in contact with the second assembly surface of the clamping member.

7. The dissimilar material joining structure according to Claim 6, characterized by The clamping member is in interference fit with the first structural member.

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