Pressing rivet nut

Abstract

The utility model discloses a pressing rivet nut which comprises a column body and a pressing rivet ring, the column body is provided with a threaded hole extending along the axis of the column body, the pressing rivet nut is characterized in that the pressing rivet ring is coaxially arranged on the outer wall of the column body, and a first end face of the pressing rivet ring is provided with a spline tooth structure. The spline tooth structure comprises a plurality of spline tooth units arranged around the axis of the column body, the inner ends of the spline tooth units extend to the outer wall of the column body, and the inner end of the top face of at least one spline tooth unit is provided with a first inclined face; a first groove is formed in the side wall, close to each first inclined plane, of the column body, and the first inclined planes are connected with the corresponding first grooves; or, the bottom, connected with the first end face of the pressing rivet ring, of the column body is arranged to be a first truncated cone, the large end of the first truncated cone is higher than the top end of the spline tooth unit, and the first inclined face extends to the side wall of the first truncated cone. The utility model has the advantages that the inflow volume of sheet metal materials can be increased, and the anti-push-out performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a self-clinching nut. Background Art

[0002] In the current machinery industry, certain areas require increasingly stringent sealing properties for fasteners, particularly in structures requiring waterproofing and dustproofing, such as battery packs for new energy vehicles. As the scope and environment of use continue to change and evolve, the requirements for nuts, a widely used fastener, are also gradually increasing.

[0003] The existing sealed self-clinching nuts have certain shortcomings, such as: 1. The anti-rotation teeth of the existing sealed self-clinching nuts are relatively short, and the anti-rotation force they can provide is limited. At the same time, the volume of the card slot that provides the push-out force is relatively small. Its performance after riveting is general, and it is not competent in some occasions with high connection strength (such as automobile body-in-white, anti-collision beams, battery packs, etc.). For example, if the nut is required to have a load protection level of 10, the sealed self-clinching nut can meet the thread requirements through heat treatment, but there are obvious disadvantages in the push-out force and anti-rotation torque, which will cause the nut thread to meet the 10-level load protection, but will fail early in terms of push-out force and anti-rotation torque. 2. The card slots used for the existing sealed self-clinching nuts for gluing or rubber rings are the same and cannot be adapted to standard rubber rings of different specifications on the market. At the same time, it is difficult to control the amount of glue applied to small-sized self-clinching nuts, which affects both the riveting effect and the sealing effect. Utility Model Content

[0004] In order to solve at least one of the above technical problems, the utility model provides a rivet nut, wherein a first inclined surface is provided at the inner end of the top surface of the tooth unit, and a first groove connected to the first inclined surface is provided on the side wall of the column close to the first inclined surface; or, the bottom of the first end surface of the column connecting the rivet ring is set to a first truncated cone, and the first inclined surface extends to the side wall of the first truncated cone, thereby increasing the inflow volume of the sheet metal material and improving the anti-push-out performance.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A self-clinching nut comprises a cylindrical body and a self-clinching ring, wherein the cylindrical body is provided with a threaded hole extending along the axis of the cylindrical body; the self-clinching ring is coaxially arranged on the outer wall of the cylindrical body, and a first end surface of the self-clinching ring is provided with a tooth structure, wherein the tooth structure comprises a plurality of tooth units arranged around the axis of the cylindrical body, the inner ends of the tooth units extending to the outer wall of the cylindrical body, and the inner end of the top surface of at least one tooth unit has a first inclined surface;

[0007] The side wall of the column close to each first inclined surface is provided with a first groove, and the first inclined surface is connected with the corresponding first groove; or,

[0008] The bottom of the first end face of the column body connecting the riveting ring is set as a first truncated cone, the large end of the first truncated cone is higher than the top end of the flower tooth unit, and the first inclined surface extends to the side wall of the first truncated cone.

[0009] Further, the first groove has a first side wall and a second side wall; the first side wall extends obliquely from the top surface to the bottom surface of the flower tooth unit, and the top end of the first side wall is above the bottom end of the first inclined surface; the top end of the second side wall is connected to the bottom end of the first inclined surface; preferably, the slope of the second side wall is consistent with that of the first inclined surface, making it easier for the sheet metal material to flow into the first groove.

[0010] Further, the first groove is arranged around the outer wall of the column body in a 360° manner, further increasing the volume of the first groove.

[0011] Further, the top surface of the outer end of the flower tooth unit is set as a first plane, and one or more inclined surfaces are arranged between the first inclined surface and the first plane; alternatively, the top end of the first inclined surface extends to the first plane; preferably, the included angle between the first inclined surface and the plane where the first plane is located is set to 25 - 35°, and the top surface of the flower tooth combines the inclined surface and the plane, improving the anti-rotation force of the flower tooth structure.

[0012] Further, the radial length of the first inclined surface is 1 - 2 times the radial length of the first plane.

[0013] Further, the outer end of the flower tooth unit is set as an arc; preferably, the outer end of the flower tooth unit is set as a semi-circle, improving the anti-rotation performance of the flower tooth structure.

[0014] Further, the height of the flower tooth unit is set to be 0.08 - 0.2 times the diameter of the threaded hole, the width of the flower tooth unit is set to be 0.2 - 0.3 times the diameter of the threaded hole; the radial length of the flower tooth unit is set to be 0.5 - 1 times the diameter of the threaded hole; the radial depth of the first groove is set to be 0.05 - 0.2 times the diameter of the threaded hole; preferably, the flower tooth structure includes 10 - 14 flower tooth units, making the flower tooth unit larger in size, and the tooth gap of the flower tooth structure wider and deeper, ensuring sufficient metal flow during riveting and guaranteeing the riveting performance.

[0015] Further, the flower tooth unit is set as a rectangular tooth, increasing the tooth gap volume of the flower tooth structure.

[0016] Further, the column located above the first groove or the first truncated cone on one side of the first end face of the riveting ring includes a second truncated cone, and the small end of the second truncated cone is close to the first end face of the riveting ring; or the column located above the first groove or the first truncated cone on one side of the first end face of the riveting ring includes a plurality of cylinders and / or truncated cones connected in sequence, and the outer diameter of the cylinder close to the first end face of the riveting ring is smaller than the outer diameter of the adjacent cylinder far from the first end face or the large end outer diameter of the truncated cone, so that the column on one side of the first end face of the riveting ring is arranged in a flared structure to improve the anti-pushing force.

[0017] Further, the threaded hole is arranged as a blind hole; a second groove surrounding the serrated structure is arranged on the first end face of the riveting ring, and a sealing component is arranged in the second groove; preferably, the second groove is arranged as a rectangular groove, and the sealing component is arranged as a sealing ring adapted to the second groove; or, the second groove is arranged as an arc groove, and the sealing component is arranged as sealant to stably provide sealing performance for the riveted product.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] (1) A first inclined surface is arranged at the inner end of the top surface of the serrated unit of the riveting nut, and a first groove connected to the first inclined surface is arranged on the side wall of the column close to the first inclined surface; or, the bottom of the column connecting the riveting ring to the first end face is arranged as a first truncated cone, and the first inclined surface extends to the side wall of the first truncated cone, which can increase the inflow volume of the sheet metal material and improve the anti-pushing performance.

[0020] (2) The outer end of the serrated unit is arranged in an arc shape, which has better anti-rotation performance compared with the pointed tooth shape, and at the same time, the tooth gap is wider and deeper, and the metal flow is sufficient during riveting, ensuring the riveting performance.

[0021] (3) A second groove surrounding the serrated structure is arranged on the first end face of the riveting ring, and a sealing component is arranged in the second groove; when the sealing component is arranged as a sealing ring, the second groove is arranged as a rectangular groove, and when the sealing component is arranged as sealant, the second groove is arranged as an arc groove. By setting the second grooves with different shapes and the corresponding sealing components, the sealing performance is improved. Description of the Drawings

[0022] In order to better understand the above and other objects, features, advantages and functions of the present utility model, the embodiments shown in the drawings can be referred to. The same reference numerals in the drawings refer to the same components. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of the present utility model and have no restrictive effect on the scope of the present utility model, and the components in the drawings are not drawn to scale.

[0023] Figure 1This is a schematic structural diagram of the riveting nut of the present utility model.

[0024] Figure 2 This is a top view of the riveting nut of the present utility model.

[0025] Figure 3 This is a schematic A-A sectional view of the first embodiment of the riveting nut of the present utility model.

[0026] Figure 4 This is an enlarged view of C1 of the first embodiment of the riveting nut of the present utility model

[0027] Figure 5 This is an enlarged view of C2 of the first embodiment of the riveting nut of the present utility model.

[0028] Figure 6 This is a schematic A-A sectional view of the second embodiment of the riveting nut of the present utility model.

[0029] Figure 7 This is an enlarged view of C3 of the second embodiment of the riveting nut of the present utility model.

[0030] Figure 8 This is an enlarged view of C4 of the second embodiment of the riveting nut of the present utility model.

[0031] Figure 9 This is a schematic B-B sectional view of the sealing ring riveting nut of the present utility model.

[0032] Figure 10 This is a schematic structural diagram of the riveting nut of the present utility model during assembly.

[0033] In the figure: 1 - cylinder; 11 - threaded hole; 12 - first groove; 121 - first side wall; 122 - second side wall; 13 - first truncated cone; 14 - second truncated cone; 15 - first cylinder; 16 - second cylinder; 17 - third truncated cone; 2 - riveting ring; 21 - first end face; 22 - second end face; 23 - serration unit; 231 - first inclined surface; 232 - first plane; 24 - second groove; 25 - sealing ring; 26 - sealant; 3 - sheet metal part; 4 - lower die; 5 - upper die. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following will describe exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to assist understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted below.

[0035] In the description of the present utility model, it should be noted that the term "including" and its variations represent open-ended inclusion, that is, "including but not limited to". The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "and / or" when used to list two or more items means that any one of the listed items can be adopted by itself, or any combination of two or more of the listed items can be adopted. In addition, in the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] First Embodiment

[0037] This embodiment provides a press riveting nut. Refer to Figures 1 - 5 As shown, it includes a column body 1 and a press riveting ring 2. The column body 1 is provided with a threaded hole 11 extending along the axis of the column body 1. The press riveting ring 2 is coaxially arranged on the outer wall of the column body 1. The first end face 21 of the press riveting ring 2 is provided with a serrated structure. The serrated structure includes a plurality of serrated units 23 arranged around the axis of the column body 1. The inner end of the serrated unit 23 extends to the outer wall of the column body 1. The inner end of the top surface of at least one serrated unit 23 has a first inclined surface 231; a first groove 12 is provided on the side wall of the column body 1 near each first inclined surface 231, and the first inclined surface 231 is connected to the corresponding first groove 12.

[0038] Each serrated unit 23 is evenly arranged around the axis of the column body 1. Preferably, the inner end of the top surface of each serrated unit 23 is provided with a first inclined surface 231, and each first inclined surface 231 is connected to the first groove 12, so that the sheet metal material can flow into the first groove 12 along the first inclined surface 231 during press riveting. The settings of the first inclined surface 231 and the first groove 12 can both increase the volume of the sheet metal material flowing in during press riveting, improve the anti-pushing performance of this press riveting nut, and improve the firmness of riveting. Moreover, when the press riveting nut is pushed out, the groove wall of the first groove 12 further acts as a blocking effect on the sheet metal material flowing into the first groove 12, thereby further increasing the pushing force of this press riveting nut and improving the anti-pushing performance.

[0039] Specifically, refer to Figure 4 and Figure 5As shown, the first groove 12 has a first side wall 121 and a second side wall 122; the first side wall 121 extends obliquely from the top surface to the bottom surface of the serrated unit 23, and the top end of the first side wall 121 is above the bottom end of the first inclined surface 231; the top end of the second side wall 122 is connected to the bottom end of the first inclined surface 231. In this way, the bottom end of the first inclined surface 231 is connected to the top end of the second side wall 122, so that the sheet metal material can flow into the first groove 12 along the first inclined surface 231 during press riveting. Preferably, the slope of the second side wall 122 is the same as that of the first inclined surface 231, so that the first inclined surface 231 extends from the top surface of the serrated unit 23 into the side wall of the column 1, making it easier for the sheet metal material to flow into the first groove 12 and more convenient for processing.

[0040] The first groove 12 is circumferentially arranged around the axis of the column 1, and there is a gap between adjacent serrated units 23. Correspondingly, the first groove 12 can be set as a segmented groove, and each serrated unit 23 is correspondingly provided with a first groove 12. Preferably, the first groove 12 can also be arranged in a 360° circumferential manner around the outer wall of the column 1 and set as a circumferentially through groove, further increasing the volume of the first groove 12 and being more convenient for processing at the same time.

[0041] In one embodiment, the top surface of the outer end of the serrated unit 23 is set as the first plane 232, and one or more inclined surfaces are arranged between the first inclined surface 231 and the first plane 232. For example, a second inclined surface with an angle with the first plane 232 smaller than the angle between the first inclined surface 231 and the first plane 232 is arranged between the first inclined surface 231 and the first plane 232. One end of the second inclined surface is connected to the first plane 232, and the other end is connected to the first inclined surface 231, which is convenient for pressing the sheet metal material and improves the anti-rotation force of the serrated structure. Or, the top end of the first inclined surface 231 extends to the first plane 232, so that the first inclined surface 231 is directly connected to the first plane 232, with a simple processing technology, increasing the volume of the sheet metal material flowing in and improving the anti-pushing performance. Preferably, the angle between the first inclined surface 231 and the plane where the first plane 232 is located is set to 25-35°. For example, the angle between the first inclined surface 231 and the plane where the first plane 232 is located can be set to 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, etc. The top surface of the serration is provided with both a plane and an inclined surface at the same time. By combining the inclined surface and the plane, the volume of the serrated structure for accommodating the sheet metal material can be increased. At the same time, the anti-rotation torque of the large-size press riveting nut can be ensured to meet the requirements. When placing the sheet metal part 3 to be assembled on the top surface of the serrated structure, the sheet metal part 3 can be easily placed on each first plane 232, and the serrated structure can stably support the sheet metal part 3, making the sheet metal part 3 placed flat and having a good perpendicularity between the press riveting nut and the sheet metal part 3.

[0042] Preferably, the radial length of the first inclined surface 231 is 1-2 times the radial length of the first plane 232. For example, the radial length of the first inclined surface 231 can be set to 1 time, 1.1 times, 1.2 times, 1.3 times, 1.4 times, 1.5 times, 1.6 times, 1.7 times, 1.8 times, 1.9 times, 2 times, etc. of the radial length of the first plane 232.

[0043] It can be understood that the radial length is the length of the projection of each component on a plane perpendicular to the axis.

[0044] In one embodiment, the outer end of the spline tooth unit 23 is provided in an arc shape, and the outer end side wall of the spline tooth unit 23 forms an arc side wall, which has better anti-rotation performance compared with the tip tooth shape. Preferably, the outer end of the spline tooth unit 23 is provided in a semi-circular shape.

[0045] As a preferred embodiment, the height of the serrated tooth unit 23 is set to be 0.08 - 0.2 times the diameter of the threaded hole 11. For example, the height of the serrated tooth unit 23 can be set to 0.08 times, 0.09 times, 0.1 times, 0.11 times, 0.12 times, 0.13 times, 0.14 times, 0.15 times, 0.16 times, 0.17 times, 0.18 times, 0.19 times or 0.2 times the diameter of the threaded hole 11, etc.; the width of the serrated tooth unit 23 is set to be 0.2 - 0.3 times the diameter of the threaded hole 11. For example, the width of the serrated tooth unit 23 can be set to 0.2 times, 0.21 times, 0.22 times, 0.23 times, 0.24 times, 0.25 times, 0.26 times, 0.27 times, 0.28 times, 0.29 times or 0.3 times the diameter of the threaded hole 11, etc.; the radial length of the serrated tooth unit 23 is set to be 0.5 - 1 times the diameter of the threaded hole 11. For example, the radial length of the serrated tooth unit 23 can be set to 0.5 times, 0.6 times, 0.7 times, 0.8 times, 0.9 times or 1 times the diameter of the threaded hole 11, etc. In this way, the serrated tooth unit 23 has a larger size, which can improve the strength of each serrated tooth unit 23 itself and also improve the anti-rotation performance of the serrated tooth structure. Preferably, the serrated tooth structure includes 10 - 14 serrated tooth units 23. For example, the serrated tooth structure can be provided with 10, 11, 12, 13 or 14 serrated tooth units 23, and each serrated tooth unit 23 is evenly arranged around the axis of the column body 1. In this way, by setting the appropriate number of serrated tooth units 23, while ensuring the anti-rotation performance, the tooth gaps of the serrated tooth structure can be made wider and deeper, increasing the inflow volume of the sheet metal material, and the metal flow is sufficient during clinching, ensuring the clinching performance. Preferably, the radial depth of the first groove 12 is set to be 0.05 - 0.2 times the diameter of the threaded hole 11. For example, the radial depth of the first groove 12 can be set to 0.05 times, 0.06 times, 0.07 times, 0.08 times, 0.09 times, 0.1 times, 0.11 times, 0.12 times, 0.13 times, 0.14 times, 0.15 times, 0.16 times, 0.17 times, 0.18 times, 0.19 times or 0.2 times the diameter of the threaded hole 11, etc.

[0046] It can be understood that the radial depth of the first groove 12 is the radial distance between the side wall of the cylinder with the axis of the cylinder 1 as the axis, where the top of the side wall with the farther distance from the axis of the cylinder 1 is located, and the bottom of the groove. For example, the tops of the first side wall 121 and the second side wall 122 are located on the side wall of the frustum. The top of the first side wall 121 is farther from the axis of the cylinder 1, and the first side wall 121 directly intersects with the second side wall 122. The radial depth of the first groove 12 is the radial distance between the top of the first side wall 121 and the bottom of the groove, that is, the radial length of the first side wall 121. The tops of the first side wall 121 and the second side wall 122 are located on the side wall of the cylinder, and the tops of the first side wall 121 and the second side wall 122 are at the same distance from the axis of the cylinder 1. The radial depth of the first groove 12 is the radial length of the first side wall 121 or the radial length of the second side wall 122.

[0047] For example, in a press-fit nut of M10, the diameter of the threaded hole 11 is 10 mm. The height of the serrated unit 23 can be set to 2 mm, the width can be set to 2.5 mm, the radial length can be set to 10 mm, and the radial depth of the first groove 12 can be set to 2 mm. The size of the serrated unit 23 and the radial depth of the first groove 12 can be set according to the specifications of the press-fit nut. As the specifications of the press-fit nut increase, each size can increase accordingly.

[0048] In one embodiment, the serrated unit 23 is set as a rectangular tooth. Compared with a tapered tooth with a size approximately the same as the small end, while ensuring the strength of each serrated unit 23, the clearance volume between the serrated units 23 can be increased, the tooth gap volume of the serrated structure can be increased, thereby increasing the inflow volume of the sheet metal material and improving the anti-pushing performance.

[0049] In one embodiment, referring to Figures 3 - 5 as shown, on one side of the first end face 21 of the press-fit ring 2, the cylinder 1 located above the first groove 12 includes a second frustum 14, and the small end of the second frustum 14 is close to the first groove 12. The cylinder 1 below the first groove 12 can be set as a cylindrical shape. The outer wall of the cylinder 1 above the first groove 12 forms a conical surface, and the diameter of the cylinder 1 gradually decreases from the end to the first groove 12, so that the cylinder 1 forms a flared structure, which improves the anti-pushing force and is convenient for processing.

[0050] In one embodiment, on one side of the first end face 21 of the press-fit ring 2, the cylinder 1 located above the first groove 12 includes a plurality of cylinders and / or frustums connected in sequence. The outer diameter of the cylinder close to the first end face 21 of the press-fit ring 2 is smaller than the outer diameter of its adjacent cylinder far from the first end face 21 or the large end outer diameter of the frustum. For example, in combination with Figure 4 、 Figure 5 、 Figure 7 and Figure 8As shown, the column 1 includes a first cylinder 15 at the end of the column 1. A second cylinder 16 is provided below the first cylinder 15. The top end of the first side wall 121 of the first groove 12 extends to the side wall of the second cylinder 16. The diameter of the first cylinder 15 is greater than that of the second cylinder 16. The second cylinder 16 can be directly connected to the lower bottom surface of the first cylinder 15; or, the first cylinder 15 and the second cylinder 16 can also be connected by a third frustum 17. The outer diameter of the large end of the third frustum 17 is equal to the diameter of the first cylinder 15, and the outer diameter of the small end of the third frustum 17 is equal to the diameter of the second cylinder 16. In this way, the column 1 on one side of the first end face 21 of the press riveting ring 2 forms a flared structure, improving the anti-pushing force. Moreover, the first cylinder 15 and the second cylinder 16 form a step, further playing a blocking role.

[0051] In one embodiment, the threaded hole 11 is set as a blind hole. The length of the threaded hole 11 can be set according to the proof load of the press riveting nut. The length of the column 1 located at the second end face 22 of the press riveting ring 2 can be increased as needed, so as to increase the thread engagement length and ensure the proof load of the nut. A second groove 24 surrounding the serrated structure is provided on the first end face 21 of the press riveting ring 2. A sealing member is provided in the second groove 24. In this way, the press riveting nut can be used as a sealed press riveting nut, and the sealing member can stably provide sealing performance for the press riveted product. Preferably, referring to Figure 9 As shown, the second groove 24 can be set as a rectangular groove, and the sealing member is set as a sealing ring 25 adapted to the second groove 24. The size of the second groove 24 can be set according to the specifications of the press riveting nut, and a standard rubber ring with a suitable specification can be selected to stably provide sealing performance. Or, referring to Figure 3 and Figure 6 As shown, the second groove 24 is set as an arc groove, and the sealing member is set as a sealant 26. Setting the second groove 24 as an arc groove can increase the filling amount of the sealant 26 and provide better sealing performance. By setting different shapes of the second groove 24 and the adapted sealing members, the sealing performance of the press riveted product can be improved.

[0052] Second Embodiment

[0053] Referring to Figures 6 - 8 As shown, other components of this embodiment are the same as those of the first embodiment. The difference from the first embodiment is that the bottom of the column 1 connecting the first end face 21 of the press riveting ring 2 is set as a first frustum 13. The large end of the first frustum 13 is higher than the top end of the serrated unit 23, and the first inclined surface 231 extends to the side wall of the first frustum 13.

[0054] In one embodiment, combining Figure 4 、 Figure 5 、 Figure 7 and Figure 8As shown, the column 1 above the first frustum 13 on one side of the first end face 21 of the press riveting ring 2 includes a second frustum 14, and the small end of the second frustum 14 is close to the large end of the first frustum 13. The first frustum 13 and the second frustum 14 can be integrally provided, the diameter of the large end of the second frustum 14 is equal to the diameter of the small end of the first frustum 13, the outer wall of the column 1 at the serrated tooth unit 23 forms a conical surface from the end of the column 1 to the first inclined surface 231, and the outer wall of the column 1 at the gap of the serrated tooth unit 23 forms a conical surface from the end of the column 1 to the first end face 21 of the press riveting ring 2. The column 1 forms a flared structure, which improves the anti-pushing force and is convenient for processing.

[0055] In one embodiment, the column 1 above the first end face 21 of the press riveting ring 2 and above the first frustum 13 includes a plurality of cylinders and / or frustums connected in sequence, and the outer diameter of the cylinder close to the first end face 21 of the press riveting ring 2 is smaller than the outer diameter of the adjacent cylinder away from the first end face 21 or the large end outer diameter of the frustum. For example, referring to Figures 6 - 8 As shown, the column 1 includes a first cylinder 15 at the end of the column 1, a second cylinder 16 is arranged below the first cylinder 15, and the bottom end of the second cylinder 16 is connected to the large end of the first frustum 13. The diameter of the first cylinder 15 is larger than the diameter of the second cylinder 16. The second cylinder 16 can be directly connected to the lower bottom surface of the first cylinder 15; alternatively, the first cylinder 15 and the second cylinder 16 can also be connected through a third frustum 17, the outer diameter of the large end of the third frustum 17 is equal to the diameter of the first cylinder 15, and the outer diameter of the small end of the third frustum 17 is equal to the diameter of the second cylinder 16. In this way, the column 1 on one side of the first end face 21 of the press riveting ring 2 forms a flared structure, which improves the anti-pushing force. Moreover, the first cylinder 15 and the second cylinder 16 form a step, which further plays a blocking role.

[0056] Referring to Figure 10As shown in the figure, when assembling the blind rivet nut onto the sheet metal part 3, place the blind rivet nut in the lower die 4 to ensure it is stable and does not warp. Pass the mounting hole of the sheet metal part 3 through the column 1 and place it flat on the first plane 232 of the serrated structure. Press the upper die 5 onto the sheet metal part 3 with appropriate pressure. The sheet metal part 3 with relatively low strength deforms, and the sheet metal material is pressed into the accommodation space and tooth gaps formed by the first groove 12 and the first inclined surface 231, or the sheet metal material is pressed into the accommodation space and tooth gaps formed by the first truncated cone 13 and the first inclined surface 231. The volume of the sheet metal material flowing into the blind rivet nut is large, and the bonding strength with the blind rivet nut is high, greatly improving the anti-push-out performance. When the blind rivet nut is set as a blind hole sealed blind rivet nut and the sealing component is set as the sealing ring 25, the upper die 5 presses the sheet metal part 3, and the sheet metal part 3 squeezes the sealing ring 25. The sealing ring 25 surrounds the periphery of the serrated structure to seal the blind rivet nut. When the sealing component is set as the sealant 26, the upper die 5 presses the sheet metal part 3, and the sealant 26 is pressed and flows into the unfilled gaps to seal the blind rivet nut.

[0057] This blind rivet nut can be set with different specifications of series products according to needs, and can be applied to sheets of different sizes and threads of different specifications, and is widely used in scenarios with high sealing strength requirements such as energy storage devices and battery packs. For the heat-treated blind rivet sealed nut, the proof load of its internal thread can reach above grade 10, and at the same time, the sealing performance can be stably provided by selecting the sealing ring 25 or the sealant 26.

[0058] As shown in Table 1, the performance parameters are for riveting the sheet metal part 3 with a thickness of 3 mm using several common specifications of this blind rivet nut.

[0059] Table 1 Performance Parameters of Blind Rivet Nut

[0060]

[0061] It can be seen from Table 1 that the anti-rotation torque and push-out force of this blind rivet nut are high, which is about 40% higher than that of the current blind rivet nuts of the same specifications, greatly improving the anti-rotation performance and anti-push-out performance of the riveting products.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A press riveting nut, comprising a column body and a press riveting ring, wherein the column body is provided with a threaded hole extending along the axis of the column body, and is characterized in that, The riveting ring is coaxially arranged on the outer wall of the column body. A serrated structure is provided on the first end face of the riveting ring. The serrated structure includes a plurality of serrated units arranged around the axis of the column body. The inner ends of the serrated units extend to the outer wall of the column body. The inner end of the top surface of at least one serrated unit has a first inclined surface; A first groove is provided on the side wall of the column body close to each first inclined surface. The first inclined surface is connected to the corresponding first groove; or, The bottom of the column body connecting the first end face of the riveting ring is set as a first truncated cone. The large end of the first truncated cone is higher than the top end of the serrated unit. The first inclined surface extends to the side wall of the first truncated cone.

2. The clinch nut according to claim 1, wherein The first groove has a first side wall and a second side wall; the first side wall extends obliquely from the top surface to the bottom surface of the serrated unit. The top end of the first side wall is above the bottom end of the first inclined surface; the top end of the second side wall is connected to the bottom end of the first inclined surface.

3. The clinch nut according to claim 2, wherein, The slope of the second side wall is the same as that of the first inclined surface.

4. The rivet nut according to claim 2, wherein The first groove is arranged in a 360° circle around the outer wall of the column body.

5. The clinch nut according to claim 1, wherein The top surface of the outer end of the serrated unit is set as a first plane. One or more inclined surfaces are arranged between the first inclined surface and the first plane; or, the top end of the first inclined surface extends to the first plane.

6. The clinch nut according to claim 5, wherein The included angle between the first inclined surface and the plane where the first plane is located is set to be 25-35°.

7. The clinch nut according to claim 5 or 6, characterized in that, The radial length of the first inclined surface is 1-2 times the radial length of the first plane.

8. The clinch nut according to claim 1, wherein, The outer end of the serrated unit is set as an arc shape.

9. The clinch nut according to claim 8, wherein, The outer end of the serrated unit is set as a semi-circular shape.

10. The clinch nut according to claim 1, characterized in that, The height of the serrated unit is set to be 0.08-0.2 times the diameter of the threaded hole. The width of the serrated unit is set to be 0.2-0.3 times the diameter of the threaded hole; the radial length of the serrated unit is set to be 0.5-1 times the diameter of the threaded hole; the radial depth of the first groove is set to be 0.05-0.2 times the diameter of the threaded hole.

11. The clinch nut according to claim 1 or 10, characterized in that, The serrated structure includes 10-14 serrated units.

12. The clinch nut according to claim 1, wherein, The serrated unit is set as a rectangular tooth.

13. The clinch nut according to claim 1, characterized in that, On one side of the first end face of the riveting ring, the column body located above the first groove or the first truncated cone includes a second truncated cone. The small end of the second truncated cone is close to the first end face of the riveting ring; or on one side of the first end face of the riveting ring, the column body located above the first groove or the first truncated cone includes a plurality of cylinders and / or truncated cones connected in sequence. The outer diameter of the cylinder close to the first end face of the riveting ring is smaller than the outer diameter of its adjacent cylinder away from the first end face or the large end outer diameter of the truncated cone.

14. The riveting nut according to claim 1, wherein The threaded hole is set as a blind hole; a second groove surrounding the serrated structure is provided on the first end face of the riveting ring. A sealing component is arranged in the second groove.

15. The clinch nut according to claim 14, wherein The second groove is set as a rectangular groove. The sealing component is set as a sealing ring adapted to the second groove; or, the second groove is set as an arc groove. The sealing component is set as sealant.

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