A clinch nut for connecting metal plates

Abstract

The utility model discloses a kind of turn rivet nuts for connecting metal plate, including hexagon nut, and the coaxial setting pipe of hexagon nut;Nut is provided with central through-hole, the inner cavity of this central through-hole is communicated with pipe, central through-hole is provided with internal thread, the diameter of pipe's inner diameter is greater than the diameter of central through-hole, the outer diameter of pipe is less than the width of hexagon nut's opposite side.This utility model provides technical scheme by setting hexagon nut and pipe, it is realized reliable turn rivet fixed with metal plate, and it also retains the thread connection ability with external structure, avoid the thread hole in the prior art on metal plate to be set to realize with external structure thread connection.

Description

Technical Field

[0001] This utility model relates to the field of hardware connectors, and in particular to a riveting nut for connecting metal plates. Background Technology

[0002] In the field of metal plate joining, while traditional riveting methods can achieve fixed connections between metal plates, they have significant technical shortcomings. Rivets primarily rely on their own deformation to achieve connection; once riveted, a non-removable fixed structure is formed between the rivet and the metal plate. This connection method prevents the rivet from being connected to an external structure via detachable methods such as threaded connections, greatly limiting subsequent maintenance, repair, and component replacement. To achieve a threaded connection between the metal plate and an external structure, threaded holes must be drilled in the metal plate, but this operation can damage the metal plate. In view of the above technical problems, this application proposes a riveting nut for connecting metal plates, which can achieve a reliable connection between the metal plates while retaining the function of detachable connection to an external structure. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a riveting nut for connecting metal plates, which aims to solve the technical problem that the metal plates connected by rivets cannot be connected to the external structure in a detachable manner in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A riveting nut for connecting metal plates includes a hexagonal nut and a round tube coaxially arranged with the hexagonal nut; the nut has a central through hole that communicates with the inner cavity of the round tube, the central through hole has an internal thread, the inner diameter of the round tube is larger than the diameter of the central through hole, and the outer diameter of the round tube is smaller than the width of opposite sides of the hexagonal nut.

[0006] Furthermore, in the riveting nut used to connect the metal plate, the front end of the round tube is provided with multiple straight grooves in the circumferential direction. Each straight groove has the same specifications and the axial length of each straight groove is 5~6mm.

[0007] Furthermore, in the riveting nut used to connect the metal plate, the front end of the round tube is provided with 4 straight grooves, and any two adjacent straight grooves are 90° apart in the circumferential direction.

[0008] Furthermore, in the riveting nut used to connect the metal plate, the thickness of the round tube at the straight groove is no more than 0.5 mm.

[0009] Furthermore, in the riveting nut used to connect the metal plate, the front end of the round tube is provided with a conical surface, and the large end diameter of the conical surface is equal to the outer diameter of the round tube body.

[0010] Furthermore, in the riveting nut used to connect the metal plate, the axial length of the conical surface is 2~3mm.

[0011] Furthermore, in the riveting nut used to connect the metal plate, the surface roughness of the conical surface is Ra1.6μm.

[0012] Furthermore, in the riveting nut used to connect the metal plate, the hexagonal nut and the round tube are integrally formed.

[0013] Furthermore, in the riveting nuts used to connect the metal plates, the hexagonal nut and the round tube are made of H62 brass.

[0014] Beneficial effects: This utility model provides a riveting nut for connecting metal plates, which has at least the following advantages compared with the prior art:

[0015] (1) By setting hexagonal nuts and round tubes, reliable riveting and fixing with metal plates can be achieved, while the ability to connect with external structures (such as bolts and screws) is also retained.

[0016] (2) Furthermore, the straight groove design at the front end of the round tube, combined with the guiding effect of the conical surface, can guide the material to deform uniformly along the preset direction, reduce riveting resistance, ensure smooth riveting process and accurate deformation, avoid tearing or irregular deformation, and improve assembly efficiency and connection consistency.

[0017] (3) The coaxial arrangement of the hexagonal nut and the round tube and the compact structural design reduce the space occupied during installation; the good processing performance of H62 brass combined with the one-piece molding process reduces the production difficulty and cost. Attached Figure Description

[0018] Figure 1 The three-dimensional representation of Embodiment 1 of this utility model Figure 1 .

[0019] Figure 2 A three-dimensional representation of the present utility model Figure 2 .

[0020] Figure 3 This is a perspective view of an embodiment of the present utility model.

[0021] Figure 4 This is a top view of an embodiment of the present utility model.

[0022] Figure 5 for Figure 4 Sectional view of AA.

[0023] Figure 6 This is a schematic diagram of a riveting nut used to connect metal plates in one usage state.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Hexagonal nut; 10. Center through hole; 11. Internal thread;

[0026] 2. Round tube; 20. Straight groove; 21. Conical surface; 29. ​​Flanged edge;

[0027] 91 and 92, metal plates. Detailed Implementation

[0028] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0029] Please see Figures 1 to 6 This utility model provides a riveting nut for connecting metal plates. The accompanying drawings are for illustrative purposes only and are not proportional to actual products. The drawings only depict structures relevant to the innovation of this application; some conventional structures are not specifically shown. The term "multiple" as used herein refers to a quantity of two or more.

[0030] Example 1

[0031] Please refer to the following first. Figure 1 and Figure 2 The riveting nut for connecting the metal plate includes a hexagonal nut 1 and a round tube 2 coaxially arranged with the hexagonal nut; the nut has a central through hole 10, which communicates with the inner cavity of the round tube, and the central through hole is provided with an internal thread 11. The inner diameter of the round tube is larger than the diameter of the central through hole, and the outer diameter of the round tube is smaller than the width of opposite sides of the hexagonal nut.

[0032] Because the round tube and hexagonal nut are coaxially aligned, it is easy to accurately insert the round tube into the pre-drilled hole in the metal plate during riveting operations. Compared to a non-coaxial design, this structure occupies less space.

[0033] Example 2

[0034] Please see Figures 3 to 5As a variation of this application, the front end of the circular tube 2 is provided with multiple straight grooves 20 in the circumferential direction. Each straight groove has the same specifications and an axial length of 5-6 mm. During the riveting operation, the front end of the circular tube expands outward under the action of the lower punch (not shown in the figure) on the riveting machine to form a sheet-like flange, thus completing the riveting process. The straight grooves guide the material at the front end of the circular tube to deform uniformly along a preset direction, avoiding tearing or irregular deformation caused by localized stress concentration. Simultaneously, the 5-6 mm axial length design results in a larger contact area between the riveted sheet-like flange and the metal plate, improving the connection strength.

[0035] Preferably, the front end of the circular tube 2 is provided with four straight grooves 20, with any two adjacent straight grooves being 90° apart in the circumferential direction. This arrangement can guide the front end of the circular tube to achieve completely symmetrical deformation in the circumferential direction during the riveting process. This symmetrical structure can ensure that the forces on each part of the front end of the circular tube are balanced, ensuring that the flange of the circular tube and the contact surface of the metal plate are flat and tight after riveting, greatly improving the stability of the connection.

[0036] Furthermore, the thickness of the circular tube 2 at the corresponding straight groove 20 is no more than 0.5 mm. This thickness design, in conjunction with the straight groove structure at the front end of the circular tube, can significantly reduce the deformation resistance during the riveting process.

[0037] Furthermore, the front end of the circular tube 2 is provided with a conical surface 21, the diameter of the larger end of the conical surface being equal to the outer diameter of the circular tube body. By providing the conical surface, the lower punch is guided during riveting, guiding the lower punch into the interior of the circular tube.

[0038] Furthermore, the axial length of the conical surface is 2~3mm. This limitation on the conical surface length provides sufficient conical surface area for guidance during riveting without weakening the structural strength of the cylindrical tube body due to excessive conical surface length.

[0039] Furthermore, the surface roughness of the conical surface is Ra1.6μm. Ra1.6μm is a medium-precision surface roughness, which can reduce the frictional resistance between the conical surface and the edge of the mounting hole in the metal plate during the riveting process.

[0040] Furthermore, the hexagonal nut 1 and the round tube 2 are integrally formed. This integral forming ensures the coaxiality accuracy of the hexagonal nut and the round tube, avoiding the axial misalignment problem that may occur during separate assembly.

[0041] Furthermore, the hexagonal nut 1 and the round tube 2 are made of H62 brass. H62 brass not only has good ductility but also moderate strength and hardness, which can meet the mechanical performance requirements of the riveted nut as a connecting component. In addition, H62 brass has good machinability and can be easily machined into precision structures such as the internal thread of the hexagonal nut, the straight groove of the round tube, and the tapered surface through integral forming processes (such as turning and casting), which can ensure the dimensional accuracy of the product.

[0042] like Figure 6 As shown, during actual riveting, the riveting nut used to connect the metal plate is forced downwards by the riveting machine's punch (not shown in the figure) through the pre-set through hole in the metal plate, and the lower punch (not shown in the figure) of the riveting machine is inserted into the round tube to complete the riveting. For the structure of Embodiment 1, the flange shape at the front end of the round tube is annular. For the structure of Embodiment 2, the front end of the round tube forms four plate-shaped flanges. Since the annular flanges and plate-shaped flanges obtained by riveting are easily understood by those skilled in the art, therefore... Figure 6 The flanging 29 is only schematically shown, and the annular flanging and the plate-shaped flanging are not specifically drawn. Since the hexagonal nut has a central through hole with internal threads, an external structure (such as a screw) can be threadedly connected to the riveting nut used to connect the metal plate, so it is not necessary to open a threaded hole in the metal plate.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A clinch nut for connecting a metal plate, comprising a hexagonal nut, characterized in that, It also includes a round tube coaxially arranged with the hexagonal nut; the nut has a central through hole that communicates with the inner cavity of the round tube, the central through hole has an internal thread, the inner diameter of the round tube is larger than the diameter of the central through hole, and the outer diameter of the round tube is smaller than the width of the opposite sides of the hexagonal nut.

2. A clinch nut for joining metal plates according to claim 1, characterized in that: The front end of the round tube has multiple straight grooves in the circumferential direction. All straight grooves have the same specifications and the axial length of each straight groove is 5~6mm.

3. A clinch nut for joining metal plates according to claim 2, characterized in that: The front end of the circular tube has four straight grooves, and any two adjacent straight grooves are 90° apart in the circumferential direction.

4. The riveting nut for connecting metal plates according to claim 3, characterized in that: The thickness of the round tube at the corresponding straight groove should not exceed 0.5 mm.

5. The clinch nut for joining metal plates according to claim 1, characterized by: The front end of the circular tube is provided with a conical surface, and the diameter of the larger end of the conical surface is equal to the outer diameter of the main body of the circular tube.

6. A clinch nut for joining metal plates according to claim 5, characterized in that: The axial length of the conical surface is 2~3mm.

7. A clinch nut for joining metal plates according to claim 5, characterized in that: The surface roughness of the conical surface is Ra1.6μm.

8. The clinch nut for joining metal plates according to claim 1, characterized by: The hexagonal nut and the round tube are integrally formed.

9. The clinch nut for joining metal plates according to claim 1, characterized by: The hexagonal nut and round tube are made of H62 brass.

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