A bulge type self-locking draw core rivet

Abstract

The application relates to a drum-bump type self-locking core-pulling rivet, and relates to the field of core-pulling rivets. The drum-bump type self-locking core-pulling rivet comprises a rivet body, a rivet core arranged on the rivet body and a rivet cap arranged on the rivet body. An annular groove for clamping the rivet body is arranged on the rivet cap. The rivet body is in threaded connection with the inner wall of the annular groove. The rivet core penetrates through the rivet cap and the rivet body. The rivet body is in threaded connection with the top cap, so that the rivet can be separated without damaging the shape of the connecting port of the plate body, the installation can be continuously carried out on the original connecting port, and an additional connecting port does not need to be arranged, so that the reinstallation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of pop rivets, and more particularly to a bulging type self-locking pop rivet. Background Technology

[0002] Blind rivets are a type of rivet used for single-sided riveting, but they require a special tool called a rivet gun for riveting. Blind rivets are particularly suitable for riveting situations where it is inconvenient to use ordinary rivets.

[0003] When using blind rivets to connect plates, several connection holes need to be pre-drilled on the plate for the rivets to pass through. If the rivet installation sequence is incorrect during installation, it will affect the subsequent installation process. The rivets need to be removed from the plate. Forcibly removing them can easily damage the connection holes. After the connection holes are damaged, another connection hole needs to be processed for reconnection, which affects the reinstallation efficiency and needs to be improved. Summary of the Invention

[0004] In order to prevent damage to the connection joint during rivet removal and improve installation efficiency, this application provides a bulging type self-locking pull rivet.

[0005] The bulging-type self-locking pull rivet provided in this application adopts the following technical solution:

[0006] A bulging self-locking pull rivet includes a rivet body, a rivet core disposed on the rivet body, and a rivet head disposed on the rivet body. The rivet head has an annular groove for the rivet body to be engaged. The rivet body is threadedly connected to the inner wall of the annular groove. The rivet core passes through the rivet head and the rivet body.

[0007] By adopting the above technical solution, when the rivet is installed on the plate, the rivet body passes through the plate and the rivet head is pressed against the plate. The riveting machine pulls the rivet core to deform the rivet body and press it against the side of the plate away from the rivet head. When it is necessary to remove the installed rivet, the rivet head is rotated to remove the rivet head from the rivet body, and the plate can be moved to the side closer to the rivet head. The rivet can be removed without damaging the shape of the plate connection, and the installation can continue on the original connection. There is no need to open a new connection, which helps to improve the reinstallation efficiency.

[0008] Preferably, the nail core includes a nail head and a pull rod, the nail head is used to compress the nail body, the nail head and the pull rod are threadedly connected, and the pull rod has a break-off point.

[0009] By adopting the above technical solution, in actual use, the nail core is divided into a nail head and a tie rod. The riveting machine pulls the tie rod tight, and the tie rod breaks at the neck. The nail head and the broken tie rod remain in the nail body. When the rivet is recycled, the nail head is taken out from the plate. After the broken nail head is separated from the plate, the nail head can be reconnected to other tie rods, which helps to improve the utilization rate of the nail head.

[0010] Preferably, the projection of the nail head along the axial direction of the nail body coincides with the weight of the nail body.

[0011] By adopting the above technical solution, after the nail head squeezes the nail body, the side of the nail body away from the nail head is larger than the nail body, which makes it easier to remove the nail head from the nail body and improves the efficiency of nail head recycling.

[0012] Preferably, the nail head includes a head disposed on the nail body and a connecting portion disposed on the head. The connecting portion has a connecting groove, and the pull rod is threadedly connected to the inner wall of the connecting groove. The head has a sliding groove, which communicates with the connecting groove. A sliding block is slidably connected to the head, and the sliding block moves into or out of the connecting groove. The pull rod is used to abut against the sliding block.

[0013] By adopting the above technical solution, during the process of the pull rod moving into the connecting groove, the pull rod abuts against the sliding block, causing the sliding block to move towards the sliding groove and disengage from the connecting groove. By observing the position of the sliding block in the sliding groove, the depth of the pull rod extending into the connecting groove can be determined, which is helpful to confirm the connection length between the pull rod and the nail head, and facilitates the confirmation of the connection strength between the nail head and the pull rod.

[0014] Preferably, the sliding block is provided with a limiting block, and a limiting groove is formed on the nail head, and the limiting block slides in the limiting groove.

[0015] By adopting the above technical solution, the sliding block is not easily detached from the nail head by abutting against the limiting block through the inner wall of the limiting groove.

[0016] Preferably, the nail head includes an inner nail ring and an outer nail ring, the annular groove is provided on the inner nail ring, the outer nail ring is used to abut against the plate body, when the outer nail ring is in contact with the plate body, the inner nail ring is spaced apart from the plate body, the inner nail ring and the outer nail ring are connected by a connecting piece, the inner nail ring has a fixing opening for connecting a riveting machine, the inner nail ring has a receiving cavity for receiving fixing material, and the receiving cavity is for the nail body to be inserted.

[0017] By adopting the above technical solution, after the rivet is removed from the plate, the rivet head detaches from the rivet body, and the inner rivet ring is reconnected to the rivet body. When it is confirmed that the rivet connection is correct, the inner rivet ring rotates and gradually moves towards the plate, while the outer rivet ring remains stationary, causing the connecting piece to break. When the inner rivet ring moves closer to the plate, the rivet body breaks through the sealing piece and gets stuck in the receiving cavity to contact the fixing material for fixation. This allows the rivet to be reused after being removed. Fixing the rivet body and the inner rivet ring with the fixing material helps to improve the positioning effect of the rivet.

[0018] Preferably, the connecting piece is disposed around the outer periphery of the inner nail ring.

[0019] By adopting the above technical solution, the connecting piece is more likely to deform in the direction of the nail body axis, and the connecting piece is more likely to break when the inner nail ring moves closer to the nail body.

[0020] Preferably, the fixing material includes resin and curing agent, and the receiving cavity is provided with a separating membrane that separates the resin and curing agent.

[0021] By adopting the above technical solution, when the nail body breaks through the sealing sheet and gets stuck in the receiving cavity, the nail body squeezes through the isolation membrane, causing the resin and curing agent in the isolation membrane to mix together and then cure, fixing the inner nail ring and the nail body, and sealing the resin and curing agent in the receiving cavity through the isolation membrane, so that the resin and curing agent are not easily deteriorated.

[0022] Preferably, the nail body is provided with a first threaded section, and the inner wall of the annular groove is provided with a second threaded section. The first threaded section and the second threaded section mesh with each other, and the length of the first threaded section is greater than the length of the second threaded section.

[0023] By adopting the above technical solution, the nail body is still threadedly connected to the inner nail ring after being inserted into the receiving cavity, which helps to improve the connection strength.

[0024] Preferably, the outer nail ring has a first abutment surface at one end away from the nail body, and the inner nail ring has a second abutment surface at one end away from the nail body. The second abutment surface is located on the side of the first abutment surface close to the nail body, and the riveting machine abuts the first abutment surface.

[0025] By adopting the above technical solution, the second abutment surface is less likely to be impacted, which in turn helps to reduce the chance of the nail accidentally getting stuck in the receiving cavity.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By connecting the rivet body to the top cap via thread, the rivet can be removed without damaging the shape of the plate connection joint, and installation can continue on the original connection joint without the need to open a new connection joint, which helps to improve reinstallation efficiency.

[0028] 2. Fixing the rivet body and inner rivet ring with a fixing material helps improve the positioning effect of the rivet;

[0029] 3. After the nail body is inserted into the receiving cavity, it is still connected to the inner nail ring thread, which helps to improve the connection strength. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0031] Figure 2 This is a cross-sectional view of this embodiment, mainly showing the internal structure of the nail body.

[0032] Figure 3 This is an exploded view of a portion of the nail head in this embodiment, mainly showing the structure inside the receiving cavity.

[0033] Explanation of reference numerals in the attached drawings: 1. Nail body; 11. Threaded section one; 2. Nail core; 21. Nail head; 211. Head; 2111. Sliding groove; 2112. Sliding block; 2113. Limiting block; 2114. Limiting groove; 212. Connecting part; 2121. Connecting groove; 22. Pull rod; 221. Neck break; 3. Nail head; 31. Inner nail ring; 311. Annular groove; 312. Threaded section two; 313. Clamping surface two; 314. Clamping surface four; 32. Outer nail ring; 321. Clamping surface one; 322. Clamping surface three; 323. Fixing port; 3231. Fixing groove; 3232. Through groove; 324. Receiving cavity; 325. Sealing plate; 326. Isolation membrane; 33. Connecting piece. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] This application discloses a bulge-type self-locking pull rivet. (Refer to...) Figure 1 and Figure 2 A bulging self-locking pull rivet includes a rivet body 1, a rivet core 2, and a rivet head 3. The rivet body 1 is cylindrical. The rivet core 2 includes a rivet head 21 and a pull rod 22. The rivet head 21 is fixedly connected to one end of the pull rod 22. The pull rod 22 passes through the rivet body 1. The rivet head 21 and the rivet head 3 are located on opposite sides of the rivet body 1. A neck 221 is machined on the pull rod 22. The rivet head 3 is threaded to the rivet body 1. The neck 221 is relatively thin, making it easy to break.

[0036] In actual use, the nail head 3 is pressed against the mounting plate. The riveting machine pulls the tie rod 22 to make the nail head 21 squeeze the nail body 1 and deform it, then presses against the plate. After the tie rod 22 breaks at the neck 221, the riveting machine drives the tie rod 22 to detach from the nail body 1.

[0037] Reference Figure 2The nail head 3 includes an inner nail ring 31 and an outer nail ring 32. An annular groove 311 is formed at the end of the inner nail ring 31 near the nail body 1. The annular groove 311 is arranged around the axis of the inner nail ring 31 and is spaced apart from the inner ring of the inner nail ring 31. A second threaded section 312 is machined on the outer inner wall of the annular groove 311. A first threaded section 11 is machined at the end of the nail body 1 near the inner nail ring 31. The nail body 1 is engaged by the cooperation of the first threaded section 11 and the second threaded section 312. The inner nail ring 31 is fixed with the threaded section 11 having a length greater than that of the threaded section 312. A connecting piece 33 is fixed on the inner nail ring 31. The connecting piece 33 is annular and is arranged around the outer circumference of the inner nail ring 31. The outer nail ring 32 is arranged around the outer circumference of the inner nail ring 31. The outer nail ring 32 and the inner nail ring 31 are spaced apart. The end of the connecting piece 33 away from the inner nail ring 31 is fixedly connected to the inner ring wall of the outer nail ring 32. The inner nail ring 31 and the outer nail ring 32 are connected by the connecting piece 33.

[0038] Reference Figure 2 An abutting surface 321 is formed on the outer nail ring 32. The abutting surface 321 is located at the end of the outer nail ring 32 away from the nail body 1. The abutting surface 321 is used to abut the riveting machine. An abutting surface 313 is formed on the inner nail ring 31. The abutting surface 313 is located on the side of the abutting surface 321 away from the nail body 1. When the riveting machine abuts the abutting surface 321 to make the outer nail ring 32 abut the mounting plate, the abutting surface 313 is spaced apart from the riveting machine. An abutment surface 322 is machined on the outer nail ring 32, located at the end of the outer nail ring 32 near the nail body 1, and is used to abut the nail body 1. An abutment surface 322 is machined on the inner nail ring 31, located at the end of the inner nail ring 31 near the nail body 1, and located on the side of the abutment surface 322 away from the nail body 1. When the abutment surface 322 is in contact with the plate, the abutment surface 314 is spaced apart from the plate. The connection point of the connecting piece 33 on the inner nail ring 31 is located between the abutment surface 313 and the abutment surface 322, and the connection point of the connecting piece 33 on the outer nail ring 32 is located between the abutment surface 321 and the abutment surface 322.

[0039] Reference Figure 2 A fixing opening 323 is provided on the mating surface 321. The fixing opening 323 includes a fixing groove 3231 and a through groove 3232. Both the fixing groove 3231 and the through groove 3232 are circular grooves. The distribution direction of the fixing groove 3231 and the through groove 3232 is parallel to the axis of the nail body 1. The axes of the fixing groove 3231, the through groove 3232 and the nail body 1 are the same. The diameter of the through groove 3232 is the same as the inner diameter of the nail body 1. The through groove 3232 is connected to the inner cylinder of the nail body 1. The through groove 3232 is connected to the fixing groove 3231. The diameter of the fixing groove 3231 is larger than the diameter of the through groove 3232. The fixing groove 3231 is connected to the through groove 3232.

[0040] In actual use, a threaded section is machined on the inner wall of the fixing groove 3231. The threaded section is used to connect with a riveting machine with screws, which facilitates the rotation of the inner nail ring 31.

[0041] Reference Figure 2 The inner nail ring 31 has a receiving cavity 324, which is located on the side of the annular groove 311 away from the nail body 1. The receiving cavity 324 communicates with the annular groove 311 and is annular in shape. A sealing plate 325 is fixed on the inner nail ring 31. The sealing plate 325 covers the receiving cavity 324. The receiving cavity 324 and the annular groove 311 are located on opposite sides of the sealing plate 325, and the sealing plate 325 is in contact with the end face of the nail body 1. In this embodiment, both the sealing plate 325 and the connecting piece 33 are made of aluminum.

[0042] Reference Figure 2 and Figure 3 The receiving cavity 324 is used to store the fixing material, which includes resin, curing agent, and accelerator. Several release films 326 are fixed on the inner nail ring 31. The release films 326 evenly divide the receiving cavity 324 into several filling cavities. The resin, curing agent, and accelerator are located in different filling cavities. The release films 326 wrap around the fixing material in the corresponding filling cavity, separating the resin, curing agent, and accelerator. When the release films 326 are broken, the resin, curing agent, and accelerator mix and solidify. The attached figure shows the state when the release films 326 are not unfolded.

[0043] In actual use, the rivet body 1 is inserted through the mounting plate. The housing of the riveting machine abuts against the first abutment surface 321, causing the third abutment surface 322 to abut against the plate. The riveting machine internally clamps and pulls the pull rod 22, causing the pull rod 22 to drive the rivet head 21 towards the inner rivet ring 31, squeezing the rivet body 1 and deforming it to fix it to the plate. When it is necessary to remove the rivet installed on the plate, rotate the outer rivet ring 32. The outer rivet ring 32 drives the inner rivet ring 31 to rotate, causing the inner rivet ring 31 to move away from the rivet body 1 and disengage from it. The rivet can be removed without damaging the mounting hole of the plate, and the removed rivet can be reinstalled on the plate. When it is confirmed that the rivet is installed in the correct position and no further removal is needed, rotate the inner rivet ring 31 to make the rivet body 1 engage in the annular groove 311. When the rivet body 1 is in contact with the sealing plate 325... With the mating face 322 adhering to the plate, continue rotating the inner nail ring 31, causing it to move closer to the plate through its threaded engagement with the nail body 1. During this process, the connecting piece 33 breaks under stress, and the nail body 1 breaks through the sealing plate 325 and becomes lodged in the receiving cavity 324. The nail body 1 compresses the isolation membrane 326 within the receiving cavity 324. After the isolation membrane 326 breaks, the resin, curing agent, and accelerator mix together and solidify, fixing the nail body 1 and the inner nail ring 31. At this point, the mating face 322 remains adhering to the plate. This improves the fixing effect of the rivet.

[0044] Reference Figure 2The nail head 21 includes a head 211 and a connecting part 212. The projection of the head 211 on the axial direction of the nail body 1 coincides with the nail body 1. The head 211 abuts against the end face of the nail body 1 away from the top cap. The head 211 is used to press the nail body 1. The connecting part 212 is located on the side of the head 211 close to the nail body 1. The head 211 and the connecting part 212 are fixedly connected. A connecting groove 2121 is provided on the end of the connecting part 212 away from the head 211. The connecting groove 2121 is for the pull rod 22 to be inserted. The pull rod 22 passes through the fixing groove 3231 and the through groove 3232 in sequence. After extending into the inner cylinder of the nail body 1, it is inserted into the connecting groove 2121 and is threadedly connected and positioned with the inner wall of the connecting groove 2121.

[0045] During installation, the riveting machine pulls the tie rod 22, causing the head 211 to compress the part of the nail body 1 that protrudes from the plate. When the nail body 1 is deformed and positioned, since the outer diameter of the head 211 is the same as the outer diameter of the nail body 1, after the nail body 1 is compressed, the inner diameter of the end of the nail body 1 near the head 211 is larger than the head 211, which makes it easier to retract the head 211 after the nail body 1 is deformed and fixed.

[0046] Reference Figure 2 A sliding groove 2111 is provided on the head 211. The sliding groove 2111 extends through the head 211 along the axis of the nail body 1 and communicates with the connecting groove 2121. A sliding block 2112 is slidably connected to the head 211. The sliding block 2112 fits against the inner wall of the sliding groove 2111. The sliding block 2112 slides into or out of the connecting groove 2121. One end of the sliding block 2112 near the connecting groove 2121 abuts against the pull rod 22. The sliding block 2112 is used to help the operator determine the length of the pull rod 22 extending into the connecting groove 2121.

[0047] Reference Figure 2 A limiting block 2113 is fixed on the sliding block 2112. The distribution direction of the limiting block 2113 and the sliding block 2112 is perpendicular to the sliding direction of the sliding block 2112. A limiting groove 2114 is opened on the head 211. The limiting groove 2114 is connected to the sliding groove 2111. The limiting block 2113 slides in the limiting groove 2114, so that the sliding block 2112 is not easy to detach from the head 211.

[0048] The implementation principle of a bulging self-locking pull rivet in this application embodiment is as follows: In actual use, the head 211 is squeezed by a riveting machine to deform the rivet body 1 and press it against the plate. Then, the rivet core 2 is pulled off to confirm whether the rivet is connected correctly. If the connection is correct, the inner rivet ring 31 is rotated to move the inner rivet ring 31 closer to the rivet body 1 and fit against the plate. One end of the rivet body 1 breaks through the sealing plate 325 and gets into the receiving cavity 324, squeezing out the isolation membrane 326. The curing material in the receiving cavity 324 is mixed and cured, and then further fixed. When the connection position needs to be adjusted, the inner rivet ring 31 is rotated to move the inner rivet ring 31 and the outer rivet ring 32 away from the rivet body 1 and disengage from the rivet body 1. The rivet can be removed without damaging the original mounting hole of the plate, which is beneficial to improving the reinstallation efficiency after installation errors.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bulging type self-locking pull rivet, characterized in that: It includes a nail body (1), a nail core (2) disposed on the nail body (1) and a nail cap (3) disposed on the nail body (1). The nail cap (3) has an annular groove (311) for the nail body (1) to be inserted into. The nail body (1) is threadedly connected to the inner wall of the annular groove (311). The nail core (2) passes through the nail cap (3) and the nail body (1). The nail head (3) includes an inner nail ring (31) and an outer nail ring (32). The annular groove (311) is provided on the inner nail ring (31). The outer nail ring (32) is used to abut against the plate. When the outer nail ring (32) is in contact with the plate, the inner nail ring (31) is spaced apart from the plate. The inner nail ring (31) and the outer nail ring (32) are connected by a connecting piece (33). The inner nail ring (31) has a fixing port (323) for connecting a riveting machine. The inner nail ring (31) has a receiving cavity (324) for receiving fixing material. The receiving cavity (324) is used for the nail body (1) to be inserted. The receiving cavity (324) is located on the side of the annular groove (311) away from the nail body (1). The receiving cavity (324) is connected to the annular groove (311). A sealing plate (325) is fixed on the inner nail ring (31). The sealing plate (325) is used to cover the receiving cavity (324). The receiving cavity (324) and the annular groove (311) are located on opposite sides of the sealing plate (325).

2. The bulge-type self-locking pull rivet according to claim 1, characterized in that: The nail core (2) includes a nail head (21) and a pull rod (22). The nail head (21) is used to press the nail body (1). The nail head (21) and the pull rod (22) are threaded together. The pull rod (22) has a broken neck (221).

3. The bulge-type self-locking pull rivet according to claim 2, characterized in that: The projection of the nail head (21) onto the axial direction of the nail body (1) coincides with that of the nail body (1).

4. The bulge-type self-locking pull rivet according to claim 2, characterized in that: The nail head (21) includes a head (211) on the nail body (1) and a connecting part (212) on the head (211). A connecting groove (2121) is provided on the connecting part (212). The pull rod (22) is threadedly connected to the inner wall of the connecting groove (2121). A sliding groove (2111) is provided on the head (211). The sliding groove (2111) communicates with the connecting groove (2121). A sliding block (2112) is slidably connected on the head (211). The sliding block (2112) moves into or out of the connecting groove (2121). The pull rod (22) is used to abut against the sliding block (2112).

5. A bulge-type self-locking pull rivet according to claim 4, characterized in that: The sliding block (2112) is provided with a limiting block (2113), and the head (211) is provided with a limiting groove (2114). The limiting block (2113) slides in the limiting groove (2114).

6. The bulge-type self-locking pull rivet according to claim 1, characterized in that: The connecting piece (33) is arranged around the outer periphery of the inner nail ring (31).

7. The bulge-type self-locking pull rivet according to claim 1, characterized in that: The fixing material includes resin and curing agent, and the receiving cavity (324) is provided with a separating membrane (326) that separates the resin and curing agent.

8. A bulge-type self-locking pull rivet according to claim 1, characterized in that: The nail body (1) is provided with a threaded section one (11), and the inner wall of the annular groove (311) is provided with a threaded section two (312). The threaded section one (11) and the threaded section two (312) mesh with each other, and the length of the threaded section one (11) is greater than the length of the threaded section two (312).

9. A bulge-type self-locking pull rivet according to claim 1, characterized in that: The outer nail ring (32) has a first abutment surface (321) at one end away from the nail body (1), and the inner nail ring (31) has a second abutment surface (313) at one end away from the nail body (1). The second abutment surface (313) is located on the side of the first abutment surface (321) close to the nail body (1), and the riveting machine abuts the first abutment surface (321).

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