Stainless steel self-plugging rivet

Abstract

The utility model discloses a stainless steel self-plugging rivet which comprises a core rivet, a first sealing surface, a second sealing surface and a third sealing surface, wherein the core rivet is provided with a concave-convex part and a first sealing surface; the rivet shell is arranged on the core rivet in a sleeving manner and covers the concave-convex part and the first sealing surface, and a second sealing surface is arranged in the rivet shell; the concave-convex part is in interference fit with the riveting shell; after one end of the core nail is pulled, the core nail is linked with the rivet shell to deform and rivet a part, the first sealing surface is tightly attached to the second sealing surface, and after the rivet shell deforms, a turning space is formed between the rivet shell and the concave-convex part; therefore, the technical problem of poor waterproof and leakage-proof effects is solved.

Description

Technical Field

[0001] This utility model relates to the field of rivet technology, specifically a stainless steel blind rivet. Background Technology

[0002] Blind rivets are generally used to connect two parts with through holes. When using them, one end of the blind rivet is inserted into the through hole, and the other end of the blind rivet is pulled by a rivet gun, which causes the rivet shell on the blind rivet to deform, thereby riveting the two parts together. They are widely used in construction, automobiles, ships, machinery, electrical appliances, furniture and other fields.

[0003] The structure of a traditional blind rivet includes: a rivet shaft and a rivet housing, which is fitted onto the rivet shaft; the length of the rivet shaft is greater than the length of the rivet housing.

[0004] When the rivet shaft is pulled by the rivet gun, the rivet shaft squeezes the rivet shell, causing the rivet shell to deform and thus rivet the two parts together. However, since the rivet shaft and the rivet shell are two separate parts, there will always be some gap between the rivet shaft and the rivet shell after they are riveted together, resulting in poor sealing and easy water leakage, and poor waterproof and leak-proof effect. Utility Model Content

[0005] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a stainless steel blind rivet to solve the technical problem of poor waterproof and leak-proof performance in the related technologies;

[0006] The technical solution to achieve the objective is: a stainless steel blind rivet, comprising: a core rivet having a concave-convex portion and a first sealing surface;

[0007] And a rivet housing, which is fitted onto the core nail, covers the concave and convex portions and the first sealing surface, and the rivet housing has a second sealing surface inside;

[0008] The protrusion and the rivet housing are interference-fitted;

[0009] When one end of the core nail is pulled, the core nail, in conjunction with the deformation of the rivet housing, rivets the parts. After this, the first sealing surface and the second sealing surface are in close contact, and after the rivet housing is deformed, there is a bending space between it and the concave and convex parts.

[0010] Furthermore: the core pin includes:

[0011] The first nail body is disposed outside the rivet housing and abuts against one end of the rivet housing;

[0012] The second nail body is disposed inside the rivet housing and connected to the first nail body. The second nail body has the concave and convex portions and the first sealing surface.

[0013] And a third nail body, one end of which is connected to the second nail body and has a fracture notch between it and the second nail body, and the other end protrudes outside the rivet housing;

[0014] The outer diameter of the first nail body is larger than the outer diameter of the second nail body.

[0015] Furthermore, the third nail body also has a wire-drawing section, which is disposed on the outside of the rivet housing.

[0016] Furthermore: the concave and convex portion includes: a plurality of annular grooves and a plurality of annular protrusions;

[0017] The annular grooves are spaced apart;

[0018] The annular protrusions are spaced apart, and the annular protrusions are connected to the annular grooves;

[0019] The annular protrusion is interference-fitted with the rivet housing.

[0020] Furthermore: the longitudinal section of the annular groove is an arc-shaped structure; the longitudinal section of the annular protrusion is an arc-shaped structure.

[0021] Furthermore: the number of annular grooves is three, one side of the first annular groove is close to the first nail body, and one side of the third annular groove is connected to the first sealing surface;

[0022] There are two annular protrusions, one of which is connected between the other side of the first annular groove and the second annular protrusion, and the other annular protrusion is connected between the second annular groove and the third annular groove.

[0023] Furthermore: the first sealing surface is a cylindrical surface;

[0024] The second sealing surface is a cylindrical surface.

[0025] Furthermore: the rivet housing includes: a sleeve, fitted onto the core nail, one end abutting against the first nail body, having a second sealing surface, the sleeve and the protrusion being interference-fitted to block the first sealing surface, a portion of the third nail body and the fracture notch, and the side wall of the sleeve having a first concave region, the first concave region being close to the first nail body;

[0026] And the outer edge of the shell, which is connected to the other end of the shell sleeve, wherein the outer diameter of the outer edge of the shell sleeve is larger than the outer diameter of the shell sleeve.

[0027] Furthermore, the side wall of the shell also has at least one second concave region, which is disposed between the first concave region and the outer edge of the shell.

[0028] Furthermore: the outer edge of the shell has a flat surface;

[0029] The thickness dimension A of the outer edge of the shell is 1.4 mm to 2 mm.

[0030] The above technical solution has the following beneficial effects: A stainless steel blind rivet, compared with related technologies, is provided with a core rivet and a rivet housing; the core rivet has a concave and convex portion and a first sealing surface; the rivet housing is fitted onto the core rivet, covering the concave and convex portion and the first sealing surface, and the rivet housing has a second sealing surface inside;

[0031] The interference fit between the concave and convex parts and the rivet housing ensures that the rivet housing is reliably connected to the core nail, resulting in relatively good connection reliability. This also facilitates the deformation of the rivet housing when one end of the core nail is pulled.

[0032] When one end of the core nail is pulled, the core nail and the riveting housing deform and rivet the parts. After the parts are riveted, the first sealing surface and the second sealing surface are in close contact. After the riveting housing is deformed, there is a bending space between it and the concave and convex parts. Due to the bending structure of the bending space, a blockage is formed. Moreover, the first sealing surface and the second sealing surface are in close contact, which improves the waterproof and leak-proof effect.

[0033] This overcomes the technical problem of poor waterproofing and leak prevention, achieving a relatively good waterproofing and leak prevention effect, and is practical. Attached Figure Description

[0034] Figure 1 Exploded view of the core pin and riveted housing;

[0035] Figure 2 This is a partial sectional view of the assembled core pin and rivet housing.

[0036] Figure 3 This is a schematic diagram of the core pin structure;

[0037] Figure 4 for Figure 2 A magnified view of a portion of the image;

[0038] Figure 5 This is a partial cross-sectional view of the riveted parts after the core pin linkage riveting housing has deformed and the riveted parts have been tightened.

[0039] In the diagram: 10. Core nail, 11. Concave-convex portion, 11-1. Annular groove, 11-2. Annular protrusion, 12. First sealing surface, 10-1. First nail body, 10-2. Second nail body, 10-3. Third nail body, 10-31. Wire drawing section, 10-4. Fracture notch, 20. Rivet housing, 21. Second sealing surface, 22. Bend space, 20-1. Shell sleeve, 20-11. First concave area, 20-12. Second concave area, 20-2. Outer edge of shell, 20-21. Plane, 100. Part. Detailed Implementation

[0040] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings;

[0041] A stainless steel blind rivet solves the technical problem of poor waterproofing and leak-proofing in related technologies. It can be manufactured and used, achieving a relatively good waterproofing and leak-proofing effect. The overall concept is as follows:

[0042] Implementation

[0043] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown; a stainless steel blind rivet, comprising: a core rivet 10, wherein the core rivet 10 has a concave-convex portion 11 and a first sealing surface 12;

[0044] And a rivet housing 20, which is fitted onto the core nail 10 and covers the concave and convex portions 11 and the first sealing surface 12. The rivet housing 20 has a second sealing surface 21 inside.

[0045] The protrusion and recess 11 are interference-fitted with the rivet housing 20;

[0046] When one end of the core nail 10 is pulled, the core nail 10 deforms in conjunction with the rivet housing 20 to rivet the part 100. After this, the first sealing surface 12 and the second sealing surface 21 are in close contact, and after the rivet housing 20 is deformed, there is a bending space 22 between it and the concave and convex parts 11.

[0047] Specifically, during implementation, the interference fit between the concave and convex part 11 and the rivet housing 20 ensures that the rivet housing 20 is reliably connected to the core nail 10. The connection reliability is relatively good, which is beneficial for the core nail 10 to deform in conjunction with the rivet housing 20 when one end of the core nail 10 is pulled.

[0048] When one end of the core nail 10 is pulled, the core nail 10 deforms in conjunction with the riveting housing 20 to rivet the part 100. After the first sealing surface 12 and the second sealing surface 21 are in close contact, and after the riveting housing 20 is deformed, there is a bending space 22 between it and the concave and convex parts 11. Due to the bending structure of the bending space 22, a blockage is formed. Moreover, the first sealing surface 12 and the second sealing surface 21 are in close contact, which improves the waterproof and leak-proof effect.

[0049] Another implementation method:

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown; in implementation, the core nail 10 includes: a first nail body 10-1, disposed outside the rivet housing 20 and abutting against one end of the rivet housing 20; a second nail body 10-2, disposed inside the rivet housing 20 and connected to the first nail body 10-1, the second nail body 10-2 having the protrusion-contour portion 11 and the first sealing surface 12; and a third nail body 10-3, one end connected to the second nail body 10-2, having a fracture notch 10-4 between it and the second nail body 10-2, the other end protruding outside the rivet housing 20;

[0051] The core nail 10 is made of stainless steel;

[0052] The outer diameter of the first nail body 10-1 is larger than that of the second nail body 10-2 and larger than that of the third nail body 10-3. The appearance is relatively beautiful. When the third nail body 10-3 is pulled by the rivet gun, the first nail body 10-1 can deform in conjunction with the rivet housing 20, and the third nail body 10-3 breaks at the fracture notch 10-4.

[0053] The third nail body 10-3 also has a wire-drawing section 10-31, which is located on the outside of the rivet housing 20; the wire-drawing section 10-31 is provided to facilitate the rivet gun to pull the third nail body 10-3.

[0054] The concave-convex portion 11 includes: a plurality of annular grooves 11-1 and a plurality of annular protrusions 11-2; the annular grooves 11-1 are spaced apart; the annular protrusions 11-2 are spaced apart, and the annular protrusions 11-2 are connected to the annular grooves 11-1; the annular protrusions 11-2 are interference-fitted with the rivet housing 20, which is beneficial for connecting the rivet housing 20, so that the rivet housing 20 is reliably connected to the core nail 10, and the assembly is relatively convenient;

[0055] The outer diameter of the annular protrusion 11-2 is larger than the outer diameter of the first sealing surface 12, which reduces the friction between the first sealing surface 12 and the riveted housing 20 and will not damage the first sealing surface 12.

[0056] The longitudinal cross-section of the annular groove 11-1 is arc-shaped; the longitudinal cross-section of the annular protrusion 11-2 is arc-shaped; there are three annular grooves 11-1, one side of the first annular groove 11-1 is close to the first nail body 10-1, and one side of the third annular groove 11-1 is connected to the first sealing surface 12; there are two annular protrusions 11-2, one annular protrusion 11-2 is connected between the other side of the first annular groove 11-1 and the second annular protrusion 11-2, and the other annular protrusion 11-2 is connected between the second annular groove 11-1 and the third annular groove 11-1; the regular shape is conducive to processing and manufacturing, which not only makes the rivet housing 20 reliably connected to the core nail 10, but also forms a bending space 22 after the rivet housing 20 is deformed. The bending space 22 has a multi-bend structure (such as... Figure 5 As shown in the image, the labyrinthine seal creates a barrier, enhancing the waterproof and leak-proof effect.

[0057] The first sealing surface 12 is a cylindrical surface; the second sealing surface 21 is a cylindrical surface; after the core nail 10 and the housing 20 deform and rivet the part 100, the first sealing surface 12 and the second sealing surface 21 are tightly attached to each other, forming a seal and improving the waterproof and leak-proof effect.

[0058] The riveting housing 20 includes: a housing 20-1, fitted onto the core nail 10, with one end abutting against the first nail body 10-1, having a second sealing surface 21, the housing 20-1 and the protrusion / concave portion 11 being interference-fitted to block the first sealing surface 12, a portion of the third nail body 10-3 and the fracture notch 10-4, and the side wall of the housing 20-1 having a first concave region 20-11, the first concave region 20-11 being close to the first nail body 10-1; and an outer shell 20-2, connected to the other end of the housing 20-1, the outer diameter of the outer shell 20-2 being larger than the outer diameter of the housing 20-1;

[0059] The shell 20-1 and the outer shell 20-2 are integrally formed and are made of stainless steel.

[0060] The first concave area 20-11 is provided to form a guide. When one end of the core nail 10 is pulled, it is beneficial for the core nail 10 to deform in conjunction with the riveting housing 20 to form a single-drum expansion area, thereby realizing the riveting of the part 100. Furthermore, a turning space 22 is formed between the single-drum expansion area and the concave-convex part 11. The turning space 22 forms a barrier, which improves the waterproof and leak-proof effect.

[0061] The side wall of the shell 20-1 also has at least one second concave region 20-12, which is located between the first concave region 20-11 and the outer edge of the shell 20-2. The second concave region 20-12, such as an arc-shaped groove, not only connects the core nail 10 and the rivet shell 20, but also forms a guide when the core nail 10 deforms in conjunction with the rivet shell 20, ensuring the coaxiality of the core nail 10 and the rivet shell 20. This is beneficial for forming a relatively beautiful and relatively uniform single-drum expansion area. In addition, the second concave region 20-12 also forms a barrier, which has the effect of waterproofing and leak prevention.

[0062] The outer edge 20-2 of the shell has a flat surface 20-21, which is conducive to tight contact with the part 100, has good structural reliability, and also has the effect of waterproofing and leak prevention.

[0063] The thickness A of the outer shell 20-2 is 1.4 mm to 2 mm, which is 2.5 mm to 3.2 mm in the prior art. This reduces its weight, prevents damage to the parts, and lowers the chance of scratching people.

[0064] Regarding part 100:

[0065] See Figure 5 Part 100 is a common structure in the prior art, such as two plates with through holes. It is not the inventive point of this utility model, but is only used to better describe this utility model and facilitate understanding of the technical solution of this utility model. Those skilled in the art can directly and without doubt know how to set it up after seeing the disclosed content, without needing to put in creative effort or conduct excessive experiments.

[0066] The working principle is as follows: A stainless steel blind rivet is inserted into the through hole on part 100. The outer wall of the rivet housing 20 contacts the through hole. When the third rivet body 10-3 is pulled by the rivet gun, the first rivet body 10-1 deforms in conjunction with the rivet housing 20, forming a single-drum expansion zone. The two parts 100 are clamped between the expansion zone and the outer edge 20-2 of the housing. The third rivet body 10-3 breaks at the fracture notch 10-4. The first rivet body 10-1 and the second rivet body 10-2 remain on the rivet housing 20. Due to the deformation of the rivet housing 20, a bending space 22 is formed. The bending space 22 has a multi-bend structure (such as...). Figure 5 As shown in the figure, the maze-like sealing effect forms a barrier. At the same time, the first sealing surface 12 and the second sealing surface 21 are in close contact to form a seal, ensuring the waterproof and leak-proof effect.

[0067] In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience or simplification of the description, rather than indicating a specific orientation that must be present; the operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use;

[0068] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments;

[0069] The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the disclosed technology, based on the technical solution and inventive concept, should be included within the scope of protection.

Claims

1. A stainless steel blind rivet, characterized in that, include: The core pin (10) has a protrusion (11) and a first sealing surface (12). And a rivet housing (20) is fitted on the core nail (10) to cover the concave and convex portions (11) and the first sealing surface (12), and the rivet housing (20) has a second sealing surface (21). The protrusion and recess (11) are interference-fitted with the rivet housing (20); When one end of the core nail (10) is pulled, the core nail (10) deforms in conjunction with the rivet housing (20) to rivet the part (100). After this, the first sealing surface (12) and the second sealing surface (21) are in close contact. After the rivet housing (20) is deformed, there is a bending space (22) between it and the concave and convex parts (11).

2. The stainless steel blind rivet according to claim 1, characterized in that: The core pin (10) includes: The first nail body (10-1) is disposed outside the rivet housing (20) and abuts against one end of the rivet housing (20); The second nail body (10-2) is disposed inside the rivet housing (20) and connected to the first nail body (10-1). The second nail body (10-2) has the protrusion and recess (11) and the first sealing surface (12). And a third nail body (10-3), one end of which is connected to the second nail body (10-2), and has a fracture notch (10-4) between it and the second nail body (10-2), and the other end protrudes from the outside of the rivet housing (20); The outer diameter of the first nail body (10-1) is larger than the outer diameter of the second nail body (10-2).

3. A stainless steel blind rivet according to claim 2, characterized in that: The third nail body (10-3) also has a wire drawing section (10-31), which is disposed on the outside of the rivet housing (20).

4. A stainless steel blind rivet according to claim 2, characterized in that: The concave and convex portion (11) includes: a plurality of annular grooves (11-1) and a plurality of annular protrusions (11-2). The annular grooves (11-1) are spaced apart; The annular protrusions (11-2) are spaced apart, and the annular protrusions (11-2) are connected to the annular grooves (11-1); The annular protrusion (11-2) and the rivet housing (20) are interference-fitted.

5. A stainless steel blind rivet according to claim 4, characterized in that: The longitudinal section of the annular groove (11-1) is an arc-shaped structure; the longitudinal section of the annular protrusion (11-2) is an arc-shaped structure.

6. A stainless steel blind rivet according to claim 5, characterized in that: The number of the annular grooves (11-1) is three. One side of the first annular groove (11-1) is close to the first nail body (10-1), and one side of the third annular groove (11-1) is connected to the first sealing surface (12). There are two annular protrusions (11-2). One annular protrusion (11-2) is connected between the other side of the first annular groove (11-1) and the second annular protrusion (11-2). The other annular protrusion (11-2) is connected between the second annular groove (11-1) and the third annular groove (11-1).

7. A stainless steel blind rivet according to claim 1, characterized in that: The first sealing surface (12) is a cylindrical surface; The second sealing surface (21) is a cylindrical surface.

8. A stainless steel blind rivet according to claim 2 or 6, characterized in that: The rivet housing (20) includes: a housing (20-1) fitted on the core nail (10), one end of which abuts against the first nail body (10-1), and has a second sealing surface (21). The housing (20-1) and the concave-convex portion (11) are interference-fitted to block the first sealing surface (12), a portion of the third nail body (10-3) and the fracture notch (10-4). The housing (20-1) has a first concave region (20-11) on its side wall, and the first concave region (20-11) is close to the first nail body (10-1). And the outer shell eaves (20-2), which are connected to the other end of the shell sleeve (20-1), wherein the outer diameter of the outer shell eaves (20-2) is larger than the outer diameter of the shell sleeve (20-1).

9. A stainless steel blind rivet according to claim 8, characterized in that: The side wall of the shell (20-1) also has at least one second concave region (20-12), which is disposed between the first concave region (20-11) and the outer edge of the shell (20-2).

10. A stainless steel blind rivet according to claim 8, characterized in that: The outer edge (20-2) of the shell has a flat surface (20-21); The thickness dimension A of the outer edge (20-2) of the shell is 1.4 mm to 2 mm.

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