Rotary drum type self-plugging rivet

Abstract

The utility model relates to the field of rivets, and discloses a rotary drum type self-plugging rivet which comprises a rivet core slidably connected in a rivet seat, an outer drum fixedly connected to the bottom of the rivet seat, a tap fixedly connected to the bottom of the outer drum, a top piece fixedly connected to the bottom end of the rivet core, a plurality of folding grooves formed in the outer drum, and a plurality of clamping grooves formed in the outer drum. A folding groove is formed in the outer drum, the folding groove is in an annular array relative to the outer drum, an inner groove is formed in the outer drum, an outer wrapping piece is fixedly connected to the outer wall of the outer drum, the outer wrapping piece is in an annular array on the outer wall of the outer drum, the rivet core is slidably connected to the interior of the inner groove, and a thickening assembly is arranged at the top of the rivet base. According to the utility model, the contact area between the rivet and the surface of a workpiece is increased through the matching of structures such as the outer drum, the folding groove and the outer wrapping piece, the increased contact area is beneficial to the uniform distribution of fastening force, and the connection stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of rivets, and more particularly to rotary drum-shaped blind rivets. Background Technology

[0002] A rivet is a mechanical fastener used to join two or more workpieces. It typically consists of a shank and a head, and the connection is achieved by passing the shank through a hole in the workpiece and then using a tool to deform the shank at the other end, causing it to clamp the workpiece together with the head. This includes rotary drum blind rivets.

[0003] In traditional rotary drum blind rivets, the rivet body is typically made of high-strength metal materials such as aluminum alloy or stainless steel. The rivet body is cylindrical, with a rivet head at one end and a hollow structure at the other to accommodate the rivet core. The rivet core is generally made of steel, cylindrical in shape, and its surface is specially treated to improve its wear resistance and corrosion resistance. One end of the rivet core has a rivet head, and the other end has a tapered structure used to expand the rivet body during the riveting process, ensuring a tight fit with the connected parts. The drum-shaped portion is located in the middle of the rivet body. This drum-shaped design allows the rivet to provide greater clamping force and shear strength after installation, making it suitable for applications requiring high connection strength.

[0004] However, the drum-shaped part of traditional rivets is often pulled directly into a compressed state by the top plate. This direct compression of the drum shape can easily lead to external damage due to uneven force, affecting the connection stability of the rivet in various application scenarios. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a rotary drum-shaped blind rivet, which aims to improve the problem that the drum shape of traditional rivets is prone to external damage due to uneven force, affecting the connection stability of the rivet in various application scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary drum-shaped blind rivet, comprising a rivet base, a rivet core slidably connected inside the rivet base, an outer drum fixedly connected to the bottom of the rivet base, a tap fixedly connected to the bottom of the outer drum, a top piece fixedly connected to the bottom end of the rivet core, multiple folded grooves formed inside the outer drum in a circular array relative to the outer drum, an inner groove formed inside the outer drum, an outer casing fixedly connected to the outer wall of the outer drum in a circular array, the rivet core slidably connected inside the inner groove, and a thickening component provided at the top of the rivet base for increasing the thickness of the rivet base.

[0007] Optionally, the thickening component includes a thickening seat disposed on the upper surface of the nail seat.

[0008] Optionally, a locking block is fixedly connected to the lower surface of the thickened seat, and the locking block is slidably connected inside the nail seat.

[0009] Optionally, a vertical groove is provided inside the nail holder, and a second spring is provided inside the nail holder, the second spring being slidably connected inside the vertical groove.

[0010] Optionally, a rotating head is slidably connected inside the thickened seat, and a limit ring is fixedly connected to the outer wall of the rotating head.

[0011] Optionally, a stud is fixedly connected to the bottom of the rotating head, a connecting post is provided at the bottom of the stud, and a spring is provided between the stud and the connecting post.

[0012] Optionally, a conical column is fixedly connected to the bottom of the connecting column, the conical column is slidably connected inside the embedded column, and the conical column is slidably connected inside the nail seat.

[0013] Optionally, the embedded column has multiple locking blocks slidably connected inside, and the locking blocks are symmetrical on both sides of the conical column.

[0014] The rotary drum-shaped blind rivet provided in this embodiment of the utility model has at least one of the following technical effects:

[0015] 1. In this utility model, the width of the top piece is relatively large compared to the connection between the tap and the outer drum, thus causing the tap to move upward. The outer drum, under pressure, is compressed upwards. Due to the multiple grooves, the compression force on the outer drum is more even. Furthermore, the outer casing surrounding the outer wall of the drum ensures that it will not easily break. This structure ensures that the outer drum experiences uniform force during use, increases the contact area with the workpiece surface, and thus makes the distribution of fastening force more uniform, improving the stability of the connection.

[0016] 2. In this utility model, the rotating head is limited by a limiting ring. The rotation of the rotating head drives the connecting column at the bottom to move downward through the threaded connection between the stud and the thickened seat. The inclined surface of the conical column can push the locking blocks on both sides. While the locking blocks move outward, they engage with the inside of the nail seat, making it impossible for the embedded column to separate from the nail seat. This achieves the effect of connecting the thickened seat and the nail seat. The setting of spring one and spring two ensures normal reset. This structure provides a convenient connection method in scenarios requiring thickening, ensuring that the rivet performs its function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the rotary drum-shaped blind rivet proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the rivet seat structure of the rotary drum-shaped blind rivet proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the thickened seat structure of the rotary drum-shaped core-pulling rivet proposed in this utility model.

[0021] The following are the labeling elements in the figure:

[0022] 1. Nail base; 2. Nail core; 3. Outer bulge; 4. Tap; 5. Top plate; 6. Folded groove; 7. Outer casing; 8. Inner groove; 9. Thickened base; 10. Rotary head; 11. Limiting ring; 12. Stud; 13. Spring 1; 14. Connecting post; 15. Conical post; 16. Vertical groove; 17. Spring 2; 18. Embedded post; 19. Locking block. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0027] In one embodiment of this utility model, such as Figures 1-2 As shown, the rotary drum-shaped blind rivet includes a rivet base 1, a rivet core 2 slidably connected inside the rivet base 1, an outer drum 3 fixedly connected to the bottom of the rivet base 1, a tap 4 fixedly connected to the bottom of the outer drum 3, a top piece 5 fixedly connected to the bottom of the rivet core 2, multiple folded grooves 6 are formed inside the outer drum 3 in a circular array relative to the outer drum 3, an inner groove 8 is formed inside the outer drum 3, an outer cover 7 is fixedly connected to the outer wall of the outer drum 3 in a circular array on the outer wall of the outer drum 3, the rivet core 2 is slidably connected inside the inner groove 8, and a thickening component is provided on the top of the rivet base 1 to increase the thickness of the rivet base 1.

[0028] Specifically, when using this rivet, it is first connected to the rivet core 2 using a rivet gun. Then, the rivet gun's operating mechanism is activated, pulling out the rivet core 2. The rivet core 2 slides within the inner groove 8 and the tap 4 inside the outer drum 3. Because the width of the top piece 5 is relatively large compared to the connection between the tap 4 and the outer drum 3, this design causes the tap 4 to move upwards. As the tap 4 moves upwards, the outer drum 3 is also compressed upwards under the force. To ensure the uniformity of this compression process, the outer drum 3 is designed with multiple grooves 6. These grooves 6 help to evenly distribute the force on the outer drum 3, thereby avoiding stress concentration that could damage the material. In the event of material failure, the outer casing 7 covers the outer wall of the outer drum 3, further enhancing the structural strength of the outer drum 3 and preventing it from breaking due to excessive force during operation. This structural design ensures that the outer drum 3 of the rivet can be evenly stressed during use, thereby increasing the contact area between the rivet and the workpiece surface. This increased contact area helps to evenly distribute the fastening force and improves the stability of the connection. Through this uniform stress and optimized contact area, the connection effect of the rivet is more reliable, effectively improving the overall strength and stability of the structural connection and ensuring the long-term firmness and safe use of the connected components.

[0029] Reference Figure 3 The thickened component includes a thickened base 9, which is disposed on the upper surface of the nail base 1. A locking block 19 is fixedly connected to the lower surface of the thickened base 9 and is slidably connected inside the nail base 1. A vertical groove 16 is provided inside the nail base 1, and a second spring 17 is provided inside the nail base 1. The second spring 17 is slidably connected inside the vertical groove 16. A rotating head 10 is slidably connected inside the thickened base 9. A limit ring 11 is fixedly connected to the outer wall of the rotating head 10. A stud 12 is fixedly connected to the bottom end of the rotating head 10. A connecting post 14 is provided at the bottom of the stud 12. A spring 13 is provided between the stud 12 and the connecting post 14. A conical post 15 is fixedly connected to the bottom of the connecting post 14 and is slidably connected inside the embedded post 18. The conical post 15 is slidably connected inside the nail base 1. Multiple locking blocks 19 are slidably connected inside the embedded post 18, and the locking blocks 19 are symmetrical on both sides of the conical post 15.

[0030] Specifically, when it is necessary to thicken the nail seat 1, the thickened seat 9 is first precisely placed on the surface of the nail seat 1. At this time, the insert 18 will be inserted into the preset hole inside the nail seat 1 to ensure the stable position of the thickened seat 9. Next, the rotating head 10 is rotated to start the thickening process. The rotating head 10 is precisely limited by the limiting ring 11 to ensure that the rotation of the rotating head 10 is within a predetermined range. The rotation of the rotating head 10 transmits the force to the connecting post 14 at the bottom through the threaded connection between the stud 12 and the thickened seat 9. The threaded action of the stud 12 pushes the connecting post 14 downward, and the position of the connecting post 14... The movement further drives the cone column 15 at its bottom to move downwards. The inclined surface design of the cone column 15 can effectively push the locking blocks 19 on both sides, so that when the locking blocks 19 move outwards, they make close contact with the locking components inside the nail seat 1. When the locking blocks 19 are locked inside the nail seat 1, the insert 18 cannot be separated from the nail seat 1. This ensures that the thickened seat 9 is firmly connected to the nail seat 1, realizing the thickening effect of the thickened seat 9. This design also ensures that the thickened seat 9 can be reset normally when it is removed by setting spring 13 and spring 2 17, which can ensure that the rivet can still maintain good performance and stability after thickening.

[0031] Working principle: When using this rivet, the rivet gun is connected to the rivet core 2. At this time, the rivet gun pulls out the rivet core 2, and the rivet core 2 slides in the inner groove 8 and the tap 4 inside the outer drum 3. At this time, since the width of the top piece 5 is relatively large compared with the connection between the tap 4 and the outer drum 3, it will drive the tap 4 to move upward. The outer drum 3 is squeezed upward after being subjected to force. Due to the setting of multiple folds 6, the compression force process of the outer drum 3 is more uniform, and the outer casing 7 surrounds the outer wall of the outer drum 3 to ensure that the outer drum 3 will not break easily. This structure ensures that the outer bulge 3 of the rivet is subjected to uniform force during use, increases the contact area with the workpiece surface, thereby making the distribution of fastening force more uniform and improving the stability of the connection. When it is necessary to thicken the rivet seat 1, the thickened seat 9 is placed on the surface of the rivet seat 1. At this time, the insert post 18 is embedded in the inside of the rivet seat 1, and the rotating head 10 is rotated. The rotating head 10 is limited by the limiting ring 11. The rotation of the rotating head 10 drives the bottom connecting post 14 to move downward through the threaded connection between the stud 12 and the thickened seat 9. At the same time as the connecting post 14 moves, it drives the bottom conical post 15 to move downward. The inclined surface of the conical post 15 can push the locking blocks 19 on both sides. While the locking blocks 19 move outward, they engage with the inside of the rivet seat 1, so that the insert post 18 cannot be separated from the rivet seat 1, achieving the effect of connecting the thickened seat 9 and the rivet seat 1. The setting of spring 13 and spring 2 17 ensures that it returns to normal. This structure provides a convenient connection method in the case of thickening, ensuring that the rivet can perform its function.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 rotary drum-shaped blind rivet, comprising a rivet base (1), characterized in that: The nail holder (1) has a nail core (2) slidably connected inside. The bottom of the nail holder (1) is fixedly connected to an outer drum (3). The bottom of the outer drum (3) is fixedly connected to a tap (4). The bottom end of the nail core (2) is fixedly connected to a top piece (5). The outer drum (3) has multiple folded grooves (6) inside. The folded grooves (6) are arranged in a ring array relative to the outer drum (3). The outer drum (3) has an inner groove (8) inside. The outer wall of the outer drum (3) is fixedly connected to an outer cover (7). The outer cover (7) is arranged in a ring array on the outer wall of the outer drum (3). The nail core (2) is slidably connected inside the inner groove (8). The top of the nail holder (1) is provided with a thickening component, which is used to thicken the nail holder (1).

2. The rotary drum-shaped blind rivet according to claim 1, characterized in that: The thickening component includes a thickening seat (9), which is disposed on the upper surface of the nail seat (1).

3. The rotary drum-shaped blind rivet according to claim 2, characterized in that: A locking block (19) is fixedly connected to the lower surface of the thickened seat (9), and the locking block (19) is slidably connected inside the nail seat (1).

4. The rotary drum-shaped blind rivet according to claim 3, characterized in that: The nail holder (1) has a vertical groove (16) inside, and a second spring (17) is provided inside the nail holder (1). The second spring (17) is slidably connected inside the vertical groove (16).

5. The rotary drum-shaped blind rivet according to claim 4, characterized in that: The thickened seat (9) has a rotating head (10) slidably connected inside, and a limit ring (11) is fixedly connected to the outer wall of the rotating head (10).

6. The rotary drum-shaped blind rivet according to claim 5, characterized in that: The bottom end of the rotating head (10) is fixedly connected to a stud (12), and a connecting post (14) is provided at the bottom of the stud (12). A spring (13) is provided between the stud (12) and the connecting post (14).

7. The rotary drum-shaped blind rivet according to claim 6, characterized in that: The bottom of the connecting post (14) is fixedly connected to a conical post (15), which is slidably connected inside the embedded post (18) and inside the nail seat (1).

8. The rotary drum-shaped blind rivet according to claim 7, characterized in that: The embedded column (18) has multiple sliding blocks (19) inside, and the blocks (19) are symmetrical on both sides of the conical column (15).

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