Pressing rivet nut and connecting structure for copper bar and aluminum bar

Abstract

The utility model provides a pressing rivet nut and a connecting structure for a copper bar and an aluminum bar. The pressing rivet nut comprises a main body part and a flange part surrounding the outer wall of the main body part, the flange part is provided with a bearing surface abutting against the plate and a mounting surface abutting against the positioning mold, and the bearing surface and the mounting surface have a height difference, so that the plate and the positioning mold have a height difference; a threaded hole penetrating in the axis direction of the main body part is formed in the main body part, and a riveting part used for being connected with a plate is arranged at the end, close to the bearing face, of the outer wall of the main body part. The riveting part comprises a discharging part, a containing part and a guiding part which are sequentially arranged in the axis direction, the pressing rivet nut has a large bearing area, the flange part is of a circular truncated cone structure with height difference, and due to the fact that the height difference exists between the bearing face and the installation face, the height difference exists between a plate and a positioning die, and the plate is not prone to falling off. The positioning die is prevented from being in contact with a riveted plate, and the plate is prevented from being impressed, deformed or damaged in coating.

Description

Technical Field

[0001] This application belongs to the technical field of fasteners, and particularly relates to a press-fit nut and connection structure for use on copper busbars and aluminum busbars. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] A press-fit nut, also known as a rivet nut or self-locking nut, is a type of nut used on thin sheets or sheet metal. It is round in shape with knurled teeth and a guide groove at one end. Its working principle involves pressing the knurled teeth into a pre-drilled hole in the sheet metal. Generally, the diameter of the pre-drilled hole is slightly smaller than the knurled teeth of the press-fit nut. Pressure forces the knurled teeth into the sheet, causing plastic deformation around the pre-drilled hole. The deformed material is then forced into the guide groove, thus creating a locking effect.

[0004] When existing press-fit nuts are used on soft metal sheets, they are prone to embedding into the sheet, causing indentations, deformation, and damage to the coating on the sheet surface.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this application is to provide a press-fit nut and connection structure for use on copper busbars and aluminum busbars to solve the above problems.

[0007] This application provides a press-fit nut for copper busbars and aluminum busbars, comprising: a main body and a flange portion surrounding the outer wall of the main body;

[0008] The flange has a bearing surface that abuts against the plate and a mounting surface that abuts against the positioning mold, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate and the positioning mold;

[0009] The main body has a threaded hole that extends through it along its axis, and the outer wall of the main body has a riveting part for connecting with the plate at one end near the bearing surface.

[0010] The riveting part includes a material discharge part, a material receiving part, and a guide part arranged sequentially along the axial direction.

[0011] Furthermore, in the aforementioned press-fit nut used on copper busbars and aluminum busbars, the diameter of the discharge portion is smaller than the diameter of the main body portion, and the discharge portion forms a discharge step with the bearing surface;

[0012] The outer diameter of the guide section is smaller than the outer diameter of the discharge section;

[0013] The diameter of the material receiving section gradually increases from the material discharging section to the guide section, and a material receiving trough is formed between the material receiving section and the material discharging section to accommodate the material flowing on the plate due to deformation.

[0014] Furthermore, in the aforementioned press-fit nuts used on copper and aluminum busbars, the outer wall of the discharge section is provided with knurled teeth.

[0015] Furthermore, in the aforementioned press-fit nuts used on copper and aluminum busbars, the length of the threaded hole is greater than 0.8D.

[0016] This application also provides a connection structure, employing the aforementioned press-fit nuts for copper and aluminum busbars, comprising:

[0017] The plate material has pre-set mounting holes;

[0018] A press-fit nut that is riveted to the plate, the press-fit nut comprising:

[0019] The flange has a bearing surface that abuts against the plate and a mounting surface that abuts against the positioning mold, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate and the positioning mold;

[0020] The main body has a threaded hole that extends through it along its axis. The outer wall of the main body has a riveting part for connecting with the mounting hole at one end near the bearing surface. The riveting part includes a material discharge part, a material receiving part, and a guide part arranged sequentially along the axis.

[0021] The riveting part is installed in the mounting hole, the plate abuts against the bearing surface, and the plate in the mounting hole deforms under the extrusion action and flows through the guide part into the material receiving groove between the material receiving part and the material discharging part.

[0022] Furthermore, in the aforementioned connection structure, the plate material is made of pure copper or pure aluminum.

[0023] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0024] The rivet nut and connecting structure for copper and aluminum busbars described in this utility model have a large bearing area, which prevents embedding into the plate when locking on soft plates. The flange is a frustum structure with a height difference. Due to the height difference between the bearing surface and the mounting surface, there is also a height difference between the plate and the positioning mold. Therefore, the design of the flange helps with positioning during installation and prevents the positioning mold from contacting the riveted plate, thus avoiding embossing, deformation, or coating damage to the plate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the press-fit nut provided in the embodiment of this application;

[0027] Figure 2 This is a front cross-sectional view of the press-fit nut provided in the embodiment of this application;

[0028] Figure 3 and Figure 4 This is a schematic diagram of the structure of the press-fit nut provided in other embodiments of this application;

[0029] Figure 5 This is an installation schematic diagram of the connection structure between the press-fit nut and the plate provided in the embodiments of this application.

[0030] In the diagram: 1. Main body; 2. Flange; 3. Threaded hole; 4. Riveting part; 41. Discharge part; 42. Material receiving part; 43. Guide part; 5. Plate; 6. Positioning mold; 7. Upper mold. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0032] In the description of this utility model, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0033] Reference Figures 1 to 5 As shown, this application provides a press-fit nut for copper busbars and aluminum busbars, including: a main body 1 and a flange 2 surrounding the outer wall of the main body 1;

[0034] The flange 2 has a bearing surface that abuts against the plate 5 and a mounting surface that abuts against the positioning mold 6, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate 5 and the positioning mold 6.

[0035] The main body 1 has a threaded hole 3 that extends through it along its axis, and a riveting part 4 for connecting with the plate 5 is provided on the outer wall of the main body 1 near the bearing surface.

[0036] The riveting part 4 includes a material discharge part 41, a material receiving part 42, and a guide part 43 arranged sequentially along the axial direction.

[0037] With the above structure, the press-fit nut in this embodiment prevents embedding into the flexible plate 5 when tightened. The flange 2 is a frustum structure with a height difference. Due to the height difference between the bearing surface and the mounting surface, there is also a height difference between the plate 5 and the positioning mold 6. Therefore, the design of the flange 2 helps with positioning during installation and prevents the positioning mold 6 from contacting the press-fitted plate 5, thus avoiding indentation, deformation, or coating damage to the plate 5. It can be widely used in pure copper and pure aluminum plates 5 of different thicknesses and can provide reliable tightening torque. The material of the press-fit nut in this embodiment is not limited to steel and is still applicable to other conductive materials such as copper or aluminum.

[0038] Specifically, refer to Figure 1 In this embodiment, the diameter of the discharge part 41 is smaller than the diameter of the main body part 1, and the discharge part 41 and the bearing surface form a discharge step;

[0039] The outer diameter of the guide portion 43 is smaller than the outer diameter of the discharge portion 41;

[0040] The diameter of the material receiving section 42 gradually increases from the discharge section 41 to the guide section 43, and a material receiving trough is formed between the material receiving section 42 and the discharge section 41 to receive the material flowing on the plate 5 due to deformation.

[0041] Specifically, refer to Figure 1 In this embodiment, the outer wall of the discharge section 41 is provided with knurled teeth. The discharge section 41 with knurled teeth can be squeezed into the material of the plate 5 during the connection process. There are gaps in the knurled teeth structure, which can form an anti-torque structure. The material of the plate 5 can be squeezed into the gaps, so that the plate 5 has the ability to resist rotation after connection.

[0042] Specifically, in this embodiment, the main body 1 can be a cylindrical structure, or it can be designed into other suitable shapes according to actual needs. The interior of the main body 1 is provided with a threaded hole 3 that extends through its axis, and the effective length of the threaded hole 3 is greater than 0.8D. Wherein, D is the nominal diameter of the threaded hole 3, which can be adapted to high-strength bolts.

[0043] In this embodiment, reference Figures 2 to 4 The flange 2 can be designed as a ring surrounding the outer wall of the main body 1. In other embodiments, the flange 2 can also be configured into other suitable shapes according to actual needs.

[0044] Reference Figure 5 This specification also provides a connection structure using the press-fit nut for copper and aluminum busbars as described above, including:

[0045] Plate 5, wherein the plate 5 is provided with preset mounting holes;

[0046] A press-fit nut that is riveted to the plate 5, the press-fit nut comprising:

[0047] The flange 2 has a bearing surface that abuts against the plate 5 and a mounting surface that abuts against the positioning mold 6, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate 5 and the positioning mold 6.

[0048] The main body 1 has a threaded hole 3 that passes through it along its axis. The outer wall of the main body 1 has a riveting part 4 for connecting with the mounting hole at one end near the bearing surface. The riveting part 4 includes a discharge part 41, a receiving part 42, and a guide part 43 arranged sequentially along the axis.

[0049] The riveting part 4 is installed in the mounting hole, the plate 5 abuts against the bearing surface, and the plate 5 in the mounting hole deforms under the extrusion action and flows through the guide part 43 into the material receiving groove between the material receiving part 42 and the material discharging part 41.

[0050] Specifically, in this embodiment, the plate 5 is made of pure copper or pure aluminum. The plate 5 is a flexible metal plate, and by utilizing the good ductility of the flexible metal plate 5, some of the material in the plate 5 is guided to flow, reducing the stress on the edges of the mounting holes in the plate 5.

[0051] Using the above structure, refer to Figure 5 The positioning mold 6 abuts against the mounting surface of the flange 2, and the plate 5 abuts against the bearing surface of the flange 2. The upper mold 7 is placed above the plate 5 and presses it down. Due to the height difference between the bearing surface and the mounting surface, the design of the flange 2 helps with positioning during installation and prevents the positioning mold 6 from contacting the riveted plate 5, thus avoiding indentation, deformation, or coating damage to the plate 5. Under the extrusion action, part of the material of the plate 5 at the mounting hole deforms and flows through the guide part 43 into the material groove between the material receiving part 42 and the material discharging part 41. The plate 5 abuts against the bearing surface of the flange 2, and the knurled material discharging part 41 can interlock with the plate 5 during the connection process. In this embodiment, the riveting method between the riveting nut on the copper busbar and aluminum busbar and the plate 5 is press riveting, which is reliable and has a simple design. It can be used in a press riveting machine or a punch press.

[0052] Although different specific embodiments are mentioned in this application, this application is not limited to the situations described in industry standards or embodiments. Slightly modified implementations based on certain industry standards or custom methods or embodiments can also achieve the same, equivalent, or similar, or predictable, implementation effects as the above embodiments. Embodiments applying these modified or modified data acquisition, processing, output, and judgment methods still fall within the scope of optional implementations of this application.

[0053] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A press-fit nut for use on copper busbars and aluminum busbars, characterized in that, include: The main body and the flange surrounding the outer wall of the main body; The flange has a bearing surface that abuts against the plate and a mounting surface that abuts against the positioning mold, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate and the positioning mold; The main body has a threaded hole that extends through it along its axis, and the outer wall of the main body has a riveting part for connecting with the plate at one end near the bearing surface. The riveting part includes a material discharge part, a material receiving part, and a guide part arranged sequentially along the axial direction.

2. The press-fit nut for copper busbars and aluminum busbars according to claim 1, characterized in that, The diameter of the discharge section is smaller than the diameter of the main body, and the discharge section and the bearing surface form a discharge step; The outer diameter of the guide section is smaller than the outer diameter of the discharge section; The diameter of the material receiving section gradually increases from the material discharging section to the guide section, and a material receiving trough is formed between the material receiving section and the material discharging section to accommodate the material flowing on the plate due to deformation.

3. The press-fit nut for copper or aluminum busbars according to claim 1 or 2, characterized in that, The outer wall of the discharge section is provided with knurled teeth.

4. The press-fit nut for copper busbars and aluminum busbars according to claim 1, characterized in that, The length of the threaded hole is greater than 0.8D.

5. A connection structure, characterized in that, The press-fit nut for copper or aluminum busbars as described in any one of claims 1-4 includes: The plate material has pre-set mounting holes; A press-fit nut that is riveted to the plate, the press-fit nut comprising: The flange has a bearing surface that abuts against the plate and a mounting surface that abuts against the positioning mold, and the bearing surface and the mounting surface have a height difference, so that there is a height difference between the plate and the positioning mold; The main body has a threaded hole that extends through it along its axis. The outer wall of the main body has a riveting part for connecting with the mounting hole at one end near the bearing surface. The riveting part includes a material discharge part, a material receiving part, and a guide part arranged sequentially along the axis. The riveting part is installed in the mounting hole, the plate abuts against the bearing surface, and the plate in the mounting hole deforms under the extrusion action and flows through the guide part into the material receiving groove between the material receiving part and the material discharging part.

6. The connection structure according to claim 5, characterized in that, The plate is made of pure copper or pure aluminum.

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