Closed drum-shaped self-plugging rivet

Abstract

The utility model relates to the technical field of rivets, and discloses a closed type drum-shaped self-plugging rivet which comprises a rivet shell, one end of the rivet shell is fixedly connected with a positioning cap, a rivet core is installed on the inner wall of the positioning cap, the other end of the rivet shell is fixedly connected with a bottom cover, the outer wall of the bottom cover is fixedly connected with a buffering cushion, and the buffering cushion is fixedly connected with the rivet shell. The outer wall of the buffering pad is fixedly connected with a bottom plate, the outer wall of the rivet core is fixedly connected with a fixed ring and a mounting ring, the outer wall of the rivet core is slidably connected with a movable ring, the opposite sides of the outer walls of the fixed ring and the movable ring are provided with filling plates, and the outer wall of the rivet shell is provided with a protection assembly. According to the utility model, the surface of a workpiece is protected in the riveting process through the bottom cover, the buffer pad and the bottom plate which are arranged on the outer wall of the rivet core in the rivet shell and the plurality of springs which are arranged on the opposite sides of the bottom cover, the buffer pad and the bottom plate, and meanwhile, support is provided for the expansion of the rivet shell; and the stability and shock resistance of the rivet after installation are ensured.

Description

Technical Field

[0001] This utility model relates to the field of rivet technology, and in particular to a closed drum-shaped pull rivet. Background Technology

[0002] Blind rivets are a common type of fastener, consisting of a rivet housing and a mandrel. They eliminate the need for manipulation from either side of the components being connected; simply pulling the mandrel with a rivet gun causes the rivet housing to expand and deform, tightly securing two or more parts. They are characterized by their ease of use and high efficiency. Blind rivets are widely used in everyday life and general industrial settings, such as fixing frames during furniture assembly, joining electronic product casings, constructing simple buildings, and installing automotive interior components.

[0003] Traditional blind rivets rely on a rivet gun to pull the mandrel, causing the rivet shell to expand and clamp the connected parts. Gaps can easily form between the rivet shell and the hole wall of the connected parts. During installation, the pulling force of the rivet gun can easily damage thin sheet metal. After installation, if subjected to significant vibration or external impact, the rivet may loosen or even fall off, affecting the connection effect. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a closed drum-shaped blind rivet, which aims to improve the problems of traditional blind rivets that easily damage thin plates during installation and that the rivet may loosen or even fall off after installation, affecting the connection effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a closed drum-shaped blind rivet, comprising a rivet shell, a positioning cap fixedly connected to one end of the rivet shell, a rivet core installed on the inner wall of the positioning cap, a bottom cover fixedly connected to the other end of the rivet shell, a buffer pad fixedly connected to the outer wall of the bottom cover, a base plate fixedly connected to the outer wall of the buffer pad, a fixing ring and an mounting ring fixedly connected to the outer wall of the rivet core, a movable ring slidably connected to the outer wall of the rivet core, a filling plate installed on the opposite side of the outer walls of the fixing ring and the movable ring, a plurality of positioning blocks fixedly connected to the outer wall of the mounting ring, a plurality of springs (spring 1 and spring 2) provided on the inner wall of the rivet shell, and a protective component provided on the outer wall of the rivet shell.

[0006] Preferably, the protective component includes a threaded ring disposed on the outer wall of the rivet shell, and a protective cap is threadedly connected to the outer wall of the threaded ring.

[0007] Preferably, the outer wall of the rivet shell is provided with multiple pressure grooves.

[0008] Preferably, the rivet core is disposed inside the rivet shell, and the base plate is fixedly connected to one end of the rivet core.

[0009] Preferably, one end of the spring is fixedly connected to the outer wall of the bottom cover, and the other end of the spring is fixedly connected to the outer wall of the base plate.

[0010] Preferably, one end of the second spring is fixedly connected to the outer wall of the base plate, and the other end of the second spring is fixedly connected to the outer wall of the fixing ring.

[0011] Preferably, the outer wall of the positioning cap is threaded and has multiple reinforcing bolts running through it.

[0012] Preferably, the buffer pad and protective cap are made of rubber, and the filling plate is made of aluminum alloy.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the bottom cover, buffer pad and base plate installed on the outer wall of the rivet core inside the rivet shell, and multiple springs installed on their opposite sides, protect the surface of the workpiece during the riveting process and provide support for the expansion of the rivet shell. The internal filling plate is used to fill the gaps inside the rivet shell, ensuring the stability and shock resistance of the rivet after installation.

[0015] 2. In this utility model, by setting a threaded ring on the outer wall of the rivet shell and connecting a protective cap with a thread, all-round protection is provided for the rivet after installation, preventing external objects from colliding and damaging the rivet, avoiding loosening of the connection or structural damage due to collision, and preventing personnel from being scratched by the tip of the rivet, thus improving the safety of use. Attached Figure Description

[0016] Figure 1 A perspective view of a closed-type drum-shaped blind rivet proposed in this utility model;

[0017] Figure 2 This is an exploded view of the protective component for a closed-type drum-shaped blind rivet proposed in this utility model;

[0018] Figure 3 This is a planar sectional view of the internal structure of a closed drum-shaped blind rivet proposed in this utility model;

[0019] Figure 4 This is a three-dimensional sectional view of the internal structure of a closed drum-shaped blind rivet proposed in this utility model.

[0020] Legend:

[0021] 1. Rivet shell; 2. Positioning cap; 3. Rivet core; 4. Bottom cover; 5. Buffer pad; 6. Base plate; 7. Fixing ring; 8. Moving ring; 9. Filler plate; 10. Mounting ring; 11. Positioning block; 12. Spring 1; 13. Spring 2; 14. Reinforcing bolt; 15. Pressure groove; 16. Threaded ring; 17. Protective cap. Detailed Implementation

[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1 , Figure 3 and Figure 4 This utility model provides an embodiment of a closed drum-shaped blind rivet, comprising a rivet shell 1, a positioning cap 2 fixedly connected to one end of the rivet shell 1, a rivet core 3 installed on the inner wall of the positioning cap 2, a bottom cover 4 fixedly connected to the other end of the rivet shell 1, a buffer pad 5 fixedly connected to the outer wall of the bottom cover 4, a base plate 6 fixedly connected to the outer wall of the buffer pad 5, a fixing ring 7 and a mounting ring 10 fixedly connected to the outer wall of the rivet core 3, a movable ring 8 slidably connected to the outer wall of the rivet core 3, and a filler plate installed on the opposite side of the outer walls of the fixing ring 7 and the movable ring 8. 9. Multiple positioning blocks 11 are fixedly connected to the outer wall of the mounting ring 10. Multiple springs 12 and 2 springs 13 are provided on the inner wall of the rivet shell 1. A protective component is provided on the outer wall of the rivet shell 1. The rivet core 3 is located inside the rivet shell 1. The base plate 6 is fixedly connected to one end of the rivet core 3. One end of spring 12 is fixedly connected to the outer wall of the bottom cover 4. The other end of spring 12 is fixedly connected to the outer wall of the base plate 6. One end of spring 2 13 is fixedly connected to the outer wall of the base plate 6. The other end of spring 2 13 is fixedly connected to the outer wall of the fixing ring 7.

[0024] Specifically, firstly, mounting holes adapted to the rivet shell 1 are machined on the workpiece to be fixed. The rivet shell 1 of the rivet is inserted into the mounting holes, so that the upper surface of the positioning cap 2 fits against the bottom of the workpiece hole. The inner wall of the positioning cap 2 provides limitation and support for the movement of the rivet core 3. Then, the equipped rivet gun is placed on the outside of the bottom end of the rivet core 3. The rivet gun is started, and the rivet core 3 is pulled by the internal cylinder. The rivet core 3 sequentially drives the base plate 6, buffer pad 5 and bottom cover 4 fixed to it to move towards the positioning cap 2. During this process, the bottom cover 4 gradually compresses the outside of the rivet shell 1. Due to the presence of the pressure groove 15, the rivet shell 1 preferentially undergoes plastic deformation from the pressure groove 15 and The uniform expansion gradually fixes the outer wall of the rivet shell 1 to the top of the mounting hole. At the same time, the base plate 6 compresses the spring 13 and squeezes the filling plate 9 between the movable ring 8 and the fixed ring 7. The filling plate 9 gradually bends from the middle protrusion and expands to the surrounding area, filling the gaps inside the rivet shell 1 and forming a closed space to prevent the subsequent infiltration of liquid, gas and other media. When the mounting ring 10 on the outer wall of the rivet core 3 moves, it works together with the positioning cap 2 to clamp the upper and lower surfaces of the workpiece in both directions. Under pressure, the multiple positioning blocks 11 with sharp points at the bottom of the mounting ring 10 gradually penetrate into the inner wall of the workpiece to form a firm mechanical engagement, further preventing the rivet from loosening.

[0025] During rivet installation, when the rivet gun pulls the rivet core 3, springs 12 and 13 are compressed, converting part of the tension into elastic potential energy. This slows down the sliding speed of each component, and the buffering effect of the springs reduces the acceleration of the component movement, effectively preventing the impact force of the rivet sliding too fast from damaging the intermediate workpiece. After installation, springs 12 and 13 will continue to provide elastic support. When the rivet is subjected to external vibration or pressure, the springs absorb energy through compression and rebound, reducing the rivet sway amplitude and improving connection stability.

[0026] Reference Figure 2 The protective component includes a screw ring 16, which is disposed on the outer wall of the rivet shell 1. A protective cap 17 is threadedly connected to the outer wall of the screw ring 16. The buffer pad 5 and the protective cap 17 are made of rubber, and the filler plate 9 is made of aluminum alloy.

[0027] Specifically, after the rivets are installed, the protective cap 17 is installed on the top of the rivet shell 1 via the screw ring 16. The screw ring 16 and the rivet shell 1 are interference-fitted to ensure that the screw ring 16 will not loosen. The rubber material of the protective cap 17 can not only prevent external objects from colliding and damaging the rivets, but also prevent people from being scratched by the rivet tip. At the same time, in some scenarios where appearance is important, it plays an aesthetic role. The aluminum alloy filling plate 9 also ensures that it is easy to be compressed and deformed to fill the gaps inside the rivet shell 1.

[0028] Reference Figure 1 The outer wall of the rivet shell 1 is provided with multiple pressure grooves 15.

[0029] Specifically, the design of multiple pressure grooves 15 allows the rivets to form a single-drum or multi-drum structure after installation, adapting to different installation scenarios.

[0030] Reference Figure 1 and Figure 2 The outer wall of the positioning cap 2 is threaded and has multiple reinforcing bolts 14 running through it.

[0031] Specifically, after installation, use a wrench to manually tighten the reinforcing bolt 14 on the positioning cap 2 to further tighten the connection between the positioning cap 2 and the workpiece, thereby providing additional fastening force for the rivet connection.

[0032] Working principle: When using this closed drum-shaped blind rivet, insert the rivet shell 1 into the reserved hole of the workpiece to be fixed, and fit the upper surface of the positioning cap 2 against the bottom of the hole. Then, use the rivet gun to put it on the outside of the bottom end of the rivet core 3. Pull the rivet core 3 with the rivet gun, and the bottom plate 6, buffer pad 5 and bottom cover 4 fixedly connected to the top of the rivet core 3 will move synchronously towards the positioning cap 2. During the movement, the bottom cover 4 will gradually compress the outside of the rivet shell 1, causing it to deform and expand from the pressure groove 15. The bottom plate 6 will gradually compress the filling plate 9 installed between it and the movable ring 8, causing it to gradually bend from the middle protrusion and expand outwards to fully fill the gap in the rivet shell 1. At the same time, the mounting ring 10 fixedly installed on the outer wall of the rivet core 3 will cooperate with the positioning cap 2 to clamp and fix the workpiece in both directions when it moves. At the same time, the multiple positioning blocks 11 installed at the bottom of the mounting ring 10 will also be driven into the inner wall of the workpiece to further fix it.

[0033] Meanwhile, the multiple springs 12 installed between the bottom cover 4 and the bottom plate 6, as well as the multiple springs 2 13 installed between the bottom plate 6 and the fixing ring 7, can also reduce vibration and sliding speed during installation, ensuring that the workpiece in the middle will not be damaged during the fixing process. After installation, they can also effectively reduce the situation where the rivets shake or even fall off due to vibration or external pressure, ensuring the stability of the rivet connection.

[0034] After installation, the multiple reinforcing bolts 14 installed on the positioning cap 2 can be manually tightened to further reinforce the rivets and ensure the stability of the rivet connection.

[0035] Furthermore, a protective cap 17 can be installed on the top of the rivet shell 1 via a screw ring 16. The soft material properties of the protective cap 17 provide protection for the interior while preventing external personnel from being injured by accidentally touching the rivet tip.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A closed-type drum-shaped blind rivet, comprising a rivet shell (1), characterized in that: One end of the rivet shell (1) is fixedly connected to a positioning cap (2), and a rivet core (3) is installed on the inner wall of the positioning cap (2). The other end of the rivet shell (1) is fixedly connected to a bottom cover (4). A buffer pad (5) is fixedly connected to the outer wall of the bottom cover (4). A base plate (6) is fixedly connected to the outer wall of the buffer pad (5). A fixing ring (7) and an installation ring (10) are fixedly connected to the outer wall of the rivet core (3). A movable ring (8) is slidably connected to the outer wall of the rivet core (3). A filling plate (9) is installed on the opposite side of the outer walls of the fixing ring (7) and the movable ring (8). Multiple positioning blocks (11) are fixedly connected to the outer wall of the installation ring (10). Multiple springs one (12) and spring two (13) are provided on the inner wall of the rivet shell (1). A protective component is provided on the outer wall of the rivet shell (1).

2. The closed-type drum-shaped blind rivet according to claim 1, characterized in that: The protective component includes a screw ring (16), which is disposed on the outer wall of the rivet shell (1), and a protective cap (17) is threadedly connected to the outer wall of the screw ring (16).

3. The closed-type drum-shaped blind rivet according to claim 1, characterized in that: The outer wall of the rivet shell (1) is provided with multiple pressure grooves (15).

4. The closed-type drum-shaped blind rivet according to claim 1, characterized in that: The rivet core (3) is located inside the rivet shell (1), and the base plate (6) is fixedly connected to one end of the rivet core (3).

5. A closed-type drum-shaped blind rivet according to claim 1, characterized in that: One end of the spring (12) is fixedly connected to the outer wall of the bottom cover (4), and the other end of the spring (12) is fixedly connected to the outer wall of the base plate (6).

6. The closed-type drum-shaped blind rivet according to claim 1, characterized in that: One end of the second spring (13) is fixedly connected to the outer wall of the base plate (6), and the other end of the second spring (13) is fixedly connected to the outer wall of the fixing ring (7).

7. The closed-type drum-shaped blind rivet according to claim 1, characterized in that: The outer wall of the positioning cap (2) is threaded and has multiple reinforcing bolts (14) running through it.

8. A closed-type drum-shaped blind rivet according to claim 2, characterized in that: The buffer pad (5) and protective cap (17) are made of rubber, and the filling plate (9) is made of aluminum alloy.

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