Pressing rivet nut and connecting system

By adding a rotary anti-rotating part to the press rivet nut, the problem of insufficient connection strength when connecting low-strength materials is solved, and stronger torque is achieved, and it is suitable for the connection of low-strength aluminum rows and other low-strength soft plates.

CN222668648UActive Publication Date: 2025-03-25PEM CHINA
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421388590.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-18
Publication Date
2025-03-25
Estimated Expiration
2034-06-18

AI Technical Summary

Technical Problem

When connecting low-strength aluminum rows and other low-strength soft sheets, the traditional press rivet nuts are insufficient to meet the tightening requirements.

Method used

A press rivet nut with an anti-rotating part is designed, which includes a flange part, a deformed pressing part, an inner hole, a positioning teeth and a anti-rotating part. The anti-rotating part is formed by the end face of one end connected to the flange part and the deformed pressing part, and surrounds the outer circumference of the positioning teeth, which enhances the torque of the nut.

Benefits of technology

By adding an anti-rotation part, after the rivet nut is riveted and connected to the connecting part, the positioning teeth and the anti-rotation part provide torque at the same time, making the torque stronger, and is suitable for the connection of low-strength aluminum rows and other low-strength soft plates.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222668648U_ABST
    Figure CN222668648U_ABST
Patent Text Reader

Abstract

The utility model provides a pressing rivet nut and a connecting system. The pressing rivet nut comprises a flange part, a nut part and a nut part, the deformation pressing part is connected to one end of the flange part in the axial direction; the inner hole penetrates through the flange part and the deformation pressing part in the axial direction; the end face of the end, connected with the deformation pressing part, of the flange part protrudes outwards to form the positioning teeth, and the positioning teeth surround the periphery of the deformation pressing part; and the multiple anti-rotation parts are formed in the mode that the end face of the end, connected with the deformation pressing part, of the flange part protrudes outwards, and the anti-rotation parts surround the peripheries of the positioning teeth. The pressing rivet nut provided by the utility model has stronger torsion, and is more suitable for the connection of connected pieces such as low-strength aluminum bars and other low-strength soft plates.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a pressure riveted nut and a connection system. Background Art

[0002] Compression rivet nuts, also known as rivet nuts and self-fastening nuts, are a type of nut used on thin plates or sheet metal parts. They are cylindrical in shape with positioning teeth and guide grooves on one end. The principle is that the positioning teeth are pressed into the prefabricated holes of the sheet metal. Generally speaking, the aperture of the prefabricated hole is slightly smaller than the positioning teeth of the compression rivet nut. The positioning teeth of the compression rivet nut are squeezed into the plate through pressure, causing plastic deformation around the prefabricated hole, and the deformed object is squeezed into the gap between the positioning teeth, thereby producing a locking effect.

[0003] The copper busbars of new energy vehicles are also widely connected with rivet nuts. However, due to the demand for reducing production costs of new energy vehicles, more and more copper busbars are replaced by aluminum busbars. However, the strength of aluminum busbars is lower. If traditional rivet nuts are still used to provide threaded connections like copper busbars, the connection strength is low and cannot meet the tightening requirements. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the main purpose of the utility model is to provide a self-clinching nut and a connection system. The provided self-clinching nut has stronger torque and is more suitable for connecting low-strength aluminum bars and other low-strength soft plates.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a self-clinching nut, which comprises:

[0007] Flange;

[0008] A deformable pressing portion, which is axially connected to one end of the flange portion and can be plastically deformed in the axial direction to be connected to a connected member;

[0009] An inner hole, the inner hole axially passes through the flange portion and the deforming and pressing portion;

[0010] A positioning tooth, the positioning tooth is formed by the end surface of one end where the flange portion is connected to the deforming and pressing portion and the positioning tooth surrounds the outer circumference of the deforming and pressing portion;

[0011] The anti-rotation part is formed by the end surface of one end where the flange part is connected to the deformable pressing part protruding outwards, and the anti-rotation part surrounds the outer periphery of the positioning tooth.

[0012] As a further description of the above technical solution, the inner edge of the positioning tooth toward the deformed pressing portion is circular;

[0013] The outer edge of the positioning tooth away from the deformed pressing portion is circular, sawtooth or polygonal.

[0014] As a further description of the above technical solution, each of the anti-rotation portions extends radially inward from the outer edge of the end surface of one end where the flange portion is connected to the deformable pressing portion.

[0015] As a further description of the above technical solution, in the radial direction of the flange portion, there is a preset interval between the end of the anti-rotation portion and the outer edge of the positioning tooth; or,

[0016] The end of the anti-rotation portion is connected to the outer edge of the positioning tooth.

[0017] As a further description of the above technical solution, threads are also provided on the inner wall of the hole section of the inner hole passing through the flange portion.

[0018] As a further description of the above technical solution, the outer diameter of the deformed pressing portion gradually decreases from an end thereof away from the flange portion to an end thereof facing the flange portion.

[0019] As a further description of the above technical solution, it also includes a groove portion, which is formed between the inner edge of the positioning tooth facing the deformation and clamping portion and the outer edge of the deformation and clamping portion facing the positioning tooth.

[0020] As a further description of the above technical solution, it also includes a rod portion, which is connected to the other end of the flange portion away from the deformation and clamping portion.

[0021] As a further description of the above technical solution, a blind hole extends inward from one end of the rod portion connected to the flange portion, and the blind hole is communicated with the inner hole.

[0022] The utility model also provides a connection system, comprising a connected member and the above-mentioned rivet nut; the connected member is riveted to one end of a flange portion of the rivet nut provided with a deformable clamping portion.

[0023] By means of the above technical solution, the outstanding effects of the utility model are:

[0024] The rivet nut provided by the utility model adds an anti-rotation part to the conventional rivet nut structure. The multiple anti-rotation parts added are all formed by the end surface protruding from one end where the flange part is connected to the deformed pressing part, and the anti-rotation part surrounds the outer periphery of the positioning teeth. Therefore, during the process of riveting the rivet nut and the connected part, the material of the end surface of the connected part facing the flange part will also be pressed to flow to a certain extent and interlock with the anti-rotation part to prevent the connected part and the rivet nut from relative rotation after riveting. Therefore, after the rivet nut and the connected part are riveted, the positioning teeth and the anti-rotation part provide torque at the same time, and the torque is stronger, so it is more suitable for the connection of low-strength aluminum bars and other low-strength soft plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a self-clinching nut in the first embodiment of the utility model;

[0026] Figure 2 It is a top view of the self-clinching nut in the first embodiment of the utility model;

[0027] Figure 3 It is an axial cross-sectional view of the self-clinching nut in the first embodiment of the utility model;

[0028] Figure 4 This is a schematic structural diagram of a self-clinching nut in a second embodiment of the utility model;

[0029] Figure 5 This is a structural schematic diagram of a self-clinching nut in a third embodiment of the utility model;

[0030] Figure 6 It is a schematic structural diagram of the self-clinching nut in the fourth embodiment of the utility model.

[0031] Description of Figure Numbers:

[0032] 1. Flange; 2. Deformation and clamping part; 3. Inner hole; 4. Positioning teeth; 5. Anti-rotation part; 6. Groove; 7. Thread; 8. Rod; 9. Blind hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0035] See also Figures 1 to 6 The utility model discloses a self-clinching nut, which comprises:

[0036] Flange part 1;

[0037] A deformable pressing portion 2, which is axially connected to one end of the flange portion 1 and can be plastically deformed in the axial direction to be connected to a connected member;

[0038] An inner hole 3, wherein the inner hole 3 axially penetrates the flange portion 1 and the deforming and pressing portion 2;

[0039] A positioning tooth 4, wherein the positioning tooth 4 is formed by the end surface of one end where the flange portion 1 is connected to the deforming and pressing portion 2 and the positioning tooth 4 surrounds the outer circumference of the deforming and pressing portion 2;

[0040] The anti-rotation part 5 , wherein the plurality of anti-rotation parts 5 are formed by the end surface of one end where the flange part 1 is connected to the deformable pressing part 2 protrudes outwards, and the anti-rotation part 5 surrounds the outer periphery of the positioning tooth 4 .

[0041] In the above-mentioned setting, like the conventional rivet nut, the rivet nut still includes a flange portion 1 and a deformable pressing portion 2 axially connected to one end of the flange portion 1 so as to be tightly connected to the light hole opened in the connected part (not shown in the figure) by a certain plastic deformation in the axial direction due to pressure when connecting the connected part (not shown in the figure), and the inner hole 3 still axially penetrates the flange portion 1 and the deformable pressing portion 2 to wait for the installation of the matching fastening bolt. The end surface of the end of the flange portion 1 connected to the deformable pressing portion 2 is still convex to form the positioning teeth 4, and the positioning teeth 4 surround the outer circumference of the deformable pressing portion 2. During the connection between the rivet nut and the connected part, the connected part will flow radially to flow into the tooth gap of the positioning teeth 4, so that the connected part and the rivet nut are interlocked, thereby preventing the connected part and the rivet nut from rotating relative to each other after riveting. In addition, the rivet nut is additionally provided with an anti-rotation portion 5, and the multiple anti-rotation portions 5 are all protruding from the end face of one end where the flange portion 1 is connected to the deformable pressing portion 2, and the anti-rotation portion 5 surrounds the outer periphery of the positioning teeth 4, so that during the process of the rivet nut being riveted to the connected part, the material of the end face of the connected part facing the flange portion 1 will also be pressurized to flow to a certain extent and interlock with the anti-rotation portion 5 to prevent the connected part and the rivet nut from relative rotation after being riveted. Therefore, after the rivet nut is riveted to the connected part, the positioning teeth 4 and the anti-rotation portion 5 provide torque at the same time, and the torque is stronger, so it is more suitable for the connection of connected parts such as low-strength aluminum bars and other low-strength soft plates.

[0042] See also Figures 1 to 3 Specifically, in the first embodiment, the cylindrical deformable clamping portion 2 is connected to the lower end of the flange portion 1, and the inner hole 3 passes through the flange portion 1 and the deformable clamping portion 2 in the vertical direction to be installed with the matching fastening bolts. The positioning teeth 4 are formed by the lower end surface of the flange portion 1 being convex and surround the outer circumference of the deformable clamping portion 2. The inner edge is circular and the outer edge is serrated. When a connected part is connected to the lower end of the rivet nut, the gap between two adjacent teeth is used to accommodate part of the material of the connected part, so that the connected part and the rivet nut are tightly fitted with each other. Of course, in other embodiments, the outer edge of the positioning teeth 4 can also be set to other shapes. For example, in the second embodiment, the outer edge of the positioning teeth 4 is set to be circular, and in the third embodiment, the outer edge of the positioning teeth 4 is set to be a rounded octagon.

[0043] See also Figure 1 to Figure 2Specifically, in this embodiment, the lower end surface of the flange portion 1 of the rivet nut is convexly formed with 10 anti-rotation portions 5, each of which is in the shape of an elongated strip, and the 10 anti-rotation portions 5 are equidistantly arranged around the outer circumference of the anti-rotation tooth in the circumferential direction so as to be able to engage with the connected member connected to the lower end surface of the flange portion 1, thereby cooperating with the anti-rotation tooth to provide torque. Of course, in other embodiments, the number of the anti-rotation portions 5 can also be set to other values. More specifically, each of the anti-rotation portions 5 starts from the outer edge of the lower end surface of the flange portion 1, and then extends radially inwardly along the flange portion 1.

[0044] See also Figure 1 , Figure 2 as well as Figure 5 Specifically, in the present embodiment and the third embodiment, there is a preset interval between the end of each anti-rotation portion 5 extending radially inwardly from the flange portion 1 and the outer edge of the positioning tooth 4. Figure 4 and Figure 6 As shown, for example, in the second embodiment and the fourth embodiment, the end of the anti-rotation portion 5 extending from the outside to the inside along the radial direction of the flange portion 1 can also be directly connected to the outer edge of the positioning tooth 4.

[0045] See also Figures 1 to 6 Specifically, in the first to fourth embodiments, the inner hole 3 is provided with a thread 7 on the inner wall of the hole section penetrating the flange portion 1 to connect with the matching fastening bolt thread 7. Of course, in other embodiments, the inner hole 3 may also be a plain hole.

[0046] Specifically, in the first to fourth embodiments, the outer diameter of the deformed clamping portion 2 gradually decreases from the end thereof away from the flange portion 1 toward the end thereof facing the flange portion 1, so that when a connected piece is connected to the end of the rivet nut provided with the deformed clamping portion 2 by using a riveting tool, the deformed clamping portion 2 is more easily compressed to produce plastic deformation along the axial direction and be connected to the connected piece.

[0047] Specifically, in the first to fourth embodiments, a groove 6 is formed between the inner edge of the positioning tooth 4 facing the deformed clamping portion 2 and the outer edge of the deformed clamping portion 2 facing the positioning tooth 4, and the groove 6 is annular. In the process of connecting the connected part to the end of the flange portion 1 of the rivet nut connected to the deformed clamping portion 2, part of the material of the connected part will also be forced to flow into the groove 6 to provide force for the rivet nut to be ejected from the connected part.

[0048] See also Figure 6 Specifically, in the fourth embodiment, the other end of the flange portion 1 away from the deforming and pressing portion 2 is also connected to a rod portion 8 for connecting to other components that are assembled with the connected part.

[0049] Specifically, in this embodiment, a blind hole 9 is extended inward from one end of the rod portion 8 connected to the flange portion 1, and the blind hole 9 is communicated with the inner hole 3. The thread 7 of the inner hole 3 extends axially toward the blind hole 9 to ensure that the axial length of the thread 7 is sufficient, so that the rivet nut is stably connected to the fastening bolt assembled in position.

[0050] Specifically, the present embodiment further discloses a connection system, including a connected member and the rivet nut as described above; the connected member is riveted to one end of the flange portion 1 of the rivet nut having a deformable clamping portion 2, and the specific riveted connection structure between the connected member and the rivet nut is consistent with that described above and will not be repeated here.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-clinching nut, characterized in that: include: Flange; A deformable pressing portion, which is axially connected to one end of the flange portion and can be plastically deformed in the axial direction to be connected to a connected member; An inner hole, the inner hole axially passes through the flange portion and the deforming and pressing portion; A positioning tooth, the positioning tooth is formed by the end surface of one end where the flange portion is connected to the deforming and pressing portion and the positioning tooth surrounds the outer circumference of the deforming and pressing portion; The anti-rotation part is formed by the end surface of one end where the flange part is connected to the deformable pressing part protruding outwards, and the anti-rotation part surrounds the outer periphery of the positioning tooth.

2. The self-clinching nut according to claim 1, characterized in that: The inner edge of the positioning tooth facing the deformed pressing portion is rounded; The outer edge of the positioning tooth away from the deformed pressing portion is circular, sawtooth or polygonal.

3. The self-clinching nut according to claim 1, characterized in that: Each of the anti-rotation portions extends radially inward from the outer edge of the end surface of one end where the flange portion is connected to the deformable pressing portion.

4. The self-clinching nut according to claim 3, characterized in that: In the radial direction of the flange portion, there is a preset interval between the end of the anti-rotation portion and the outer edge of the positioning tooth; or, The end of the anti-rotation portion is connected to the outer edge of the positioning tooth.

5. The self-clinching nut according to claim 1, characterized in that: The inner wall of the hole section of the inner hole penetrating through the flange part is also provided with threads.

6. The self-clinching nut according to claim 1, characterized in that: The outer diameter of the deformed pressing portion gradually decreases from an end thereof away from the flange portion to an end thereof facing the flange portion.

7. The self-clinching nut according to claim 1, characterized in that: The invention also includes a groove portion, wherein the groove portion is formed between an inner edge of the positioning tooth facing the deformation pressing portion and an outer edge of the deformation pressing portion facing the positioning tooth.

8. The self-clinching nut according to claim 1, characterized in that: It also includes a rod portion, which is connected to the other end of the flange portion away from the deformation and pressing portion.

9. The self-clinching nut according to claim 8, characterized in that: A blind hole is extended inwardly from one end of the rod portion connected to the flange portion, and the blind hole is communicated with the inner hole.

10. A connection system, characterized in that: It comprises a connected part and the rivet nut according to any one of claims 1 to 9; the connected part is riveted to one end of the flange portion of the rivet nut provided with a deforming clamping portion.