Rivet plug dismounting tool

Abstract

The utility model belongs to the technical field of pipe system plugging accessories and pipe plugs, and particularly relates to a rivet plug dismounting tool which comprises a sleeve, a pull rod and a nut. The sleeve internally comprises an accommodating cavity and a front-back through guide hole; the containing cavity is formed in the front end of the sleeve and communicates with the guide hole. The front end of the pull rod is provided with a force application threaded section capable of being connected with a pull rivet plug, and the rear end of the pull rod is provided with a stress threaded section. The pull rod is slidably arranged in the guide hole; the force application threaded section is arranged at the end close to the containing cavity, and the stress threaded section is arranged at the end away from the containing cavity. Through actions of rotating the nut, pulling the pull rod and the like, the pull rivet plug which is difficult to disassemble can be disassembled more conveniently. In addition, an anti-rotation block is arranged on the pull rod, so that the anti-rotation block is matched with an anti-rotation hole in the sleeve, the problem that the pull rod rotates along with the nut when the nut is rotated and is difficult to disassemble is solved, the disassembly efficiency is improved, and meanwhile unnecessary damage and cost waste in the disassembly process are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plugging accessory dismounting, and particularly relates to a pull-riveting plug dismounting tool. BACKGROUND

[0002] In mechanical products such as automobile engines, gearboxes, and new energy automobile power system housings, there are often complex cooling channel systems. These holes cannot be realized through pressure casting process when the housings are pressure cast, so they are drilled to be open in the later machining process to ensure the interconnectivity of various cavities in the housing. To realize the sealing of the housing, the process holes need to be plugged before the housing is assembled. The aluminum alloy threaded pull-riveting plug is a common accessory for plugging process holes.

[0003] The pull-riveting plug is widely used in the plugging of various holes due to its convenience in installation and good sealing performance. However, the pull-riveting plug is difficult to dismount once installed due to its high sealing effect. In actual production, the difficulty in dismounting the pull-riveting plug may cause some problems, such as the need to spend a lot of time and effort to dismount the plug when repairing or replacing parts, which reduces the repair efficiency; and in the dismounting process, the hole or surrounding parts may be damaged, affecting the quality and service life of the product. In addition, although the pull-riveting plug can be removed in a destructive manner, the debris generated after dismounting may block the hole, and the process hole may be easily damaged during the dismounting process, thereby causing subsequent failures. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a pull-riveting plug dismounting tool, aiming to efficiently and non-destructively dismount the pull-riveting plug.

[0005] To achieve the above-mentioned purpose, the utility model provides a pull-riveting plug dismounting tool, which comprises a sleeve, a pull rod, and a nut. The sleeve comprises a receiving cavity and a front-to-back through guide hole. The receiving cavity is arranged at the front end of the sleeve, and the guide hole is in communication with the receiving cavity. The front end of the pull rod is provided with a force applying threaded section connectable with the pull-riveting plug, and the rear end of the pull rod is provided with a force receiving threaded section. The pull rod is slidably arranged in the guide hole. The force applying threaded section is arranged at one end close to the receiving cavity, and the force receiving threaded section is arranged at one end away from the receiving cavity. The front end of the sleeve has a first support surface, which abuts against the end surface of the part on which the pull-riveting plug is arranged when the pull-riveting plug is dismounted. The rear end of the sleeve has a second support surface. The nut is matched with the force receiving threaded section, and the front end surface of the nut is in contact with the second support surface when the pull-riveting plug is dismounted.

[0006] The nut is connected with the force receiving threaded segment on the pull rod, the top end of the pull rod is aligned with the rivet plug in the process hole, the force applying threaded segment is connected with the rivet plug through the thread, the fixed sleeve is rotated and the nut is rotated, the front end surface of the nut and the second supporting surface and the first supporting surface are abutted with the end surface of the process hole, the pull rod applies a backward pulling force to the rivet plug, the rivet plug is pulled outward, and the rivet plug is disassembled.

[0007] Further, the sleeve further comprises an anti-rotation hole located at one end away from the accommodating cavity, and the anti-rotation hole is in communication with the guide hole; the pull rod further comprises an anti-rotation block which is slidably arranged in the anti-rotation hole; the anti-rotation block is in circumferential contact with the inner circumferential wall of the anti-rotation hole through the outer circumferential wall of the anti-rotation block, so as to prevent the pull rod from rotating relative to the sleeve.

[0008] When the nut is rotated, the nut applies a pulling force to the pull rod, the anti-rotation block cannot rotate due to the abutting relationship between the anti-rotation block and the anti-rotation hole, the pull rod cannot rotate with the rotation of the nut, and the pull rod slides relative to the sleeve, so that the rivet plug is disassembled.

[0009] Further, the anti-rotation hole has a hexagonal inner surface, and the anti-rotation block has a hexagonal outer surface; the outer surface of the anti-rotation block is slidably connected with the inner surface of the anti-rotation hole.

[0010] The outer surface of the anti-rotation block is tightly fitted with the inner wall of the hexagonal hole of the anti-rotation hole, when the nut is rotated, the pulling force applied by the nut to the pull rod drives the anti-rotation block to move together, and the anti-rotation block slides along the inner wall of the anti-rotation hole due to the cooperation between the anti-rotation block and the anti-rotation hole.

[0011] Further, the pull rod further comprises a connecting rod; the connecting rod is provided with a force applying threaded segment at the end thereof, and the other end of the connecting rod is connected with the anti-rotation block; the front end of the force receiving threaded segment and the rear end of the anti-rotation block are integrally connected, the front end of the anti-rotation block and the rear end of the connecting rod are integrally connected, and the front end of the connecting rod and the rear end of the force applying threaded segment are integrally connected.

[0012] The connecting rod passes through the guide hole, the force applying threaded segment at the end of the connecting rod passes through the accommodating cavity and is threadedly connected with the rivet plug in the process hole, when the nut is rotated to apply a pulling force to the pull rod, the force applying threaded segment applies a pulling force to the rivet plug towards the nut, so that the rivet plug is gradually pulled out.

[0013] Further, the accommodating cavity is a cylindrical cavity; the diameter of the accommodating cavity is greater than the diameter of the rivet plug, and the depth of the accommodating cavity is longer than the length of the rivet plug.

[0014] The force applying threaded segment drives the rivet plug, so that the disassembled rivet plug is arranged in the accommodating cavity.

[0015] Further, the sleeve has a torque application surface on the outside, which is used to cooperate with a torque tool; the cross section of the torque application surface is quadrilateral, pentagonal, hexagonal, heptagonal, octagonal, nonagonal, decagonal, hendecagonal or dodecagonal.

[0016] Further, the anti-rotation block and the connecting rod have a guide corner; the rear end of the guide hole has a flared mouth; the guide corner can be accommodated in the flared mouth.

[0017] The guide corner and the flared mouth cooperate to reduce the friction between the anti-rotation block and the inner wall of the anti-rotation hole and the guide hole, thereby avoiding the cracking of the anti-rotation block.

[0018] Further, a sliding gap is arranged between the inner wall of the guide hole and the outer wall of the connecting rod, and the width of the sliding gap is 0.02-0.3mm.

[0019] The sliding gap allows the connecting rod to slide smoothly in the guide hole while preventing radial shaking.

[0020] Further, when the anti-rotation block abuts against the rear end surface of the guide hole, the length of the force-bearing threaded segment in the anti-rotation hole is greater than the length of the rivet plug.

[0021] At this time, the nut is tightly attached to the sleeve, the front end surface of the nut abuts against the second support surface, the nut is threadedly connected with the force-bearing threaded segment, and the length of the force-bearing threaded segment in the anti-rotation hole is greater than the length of the rivet plug, so that there is enough length to pull out the rivet plug and place the rivet plug in the accommodating cavity, thereby preventing the whole force-bearing threaded segment from rotating out and the situation of incomplete disassembly caused by insufficient length to pull out the rivet plug.

[0022] Further, the anti-rotation hole and the anti-rotation block have the same polygonal cross section.

[0023] Advantages

[0024] The rivet plug disassembly tool can more conveniently disassemble the rivet plug. The problem that the rivet plug is difficult to disassemble is solved by rotating the nut to drive the pull rod, the disassembly efficiency is improved, unnecessary damage in the disassembly process is reduced, and the integrity of the disassembly of the rivet plug is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 And Figure 2 Fig. 1 is a structural schematic view of the rivet plug disassembly tool;

[0026] Figure 3 Fig. 3 is a structural schematic view of the pull rod in the rivet plug disassembly tool;

[0027] Figure 4 Fig. 5 is a local enlarged schematic view of the guide corner and the flared mouth in the rivet plug disassembly tool;

[0028] Figure 5 This is a side view of the sleeve in the rivet plug removal tool;

[0029] Figures 6 to 8 A schematic diagram illustrating the changes in state when a rivet plug is removed using disassembly tools. Figure 6 This is a schematic diagram showing the state of the rivet plug before disassembly using the tool. Figure 7 This is a schematic diagram showing the state when the tie rod is screwed into the rivet plug. Figure 8 This is a schematic diagram showing the state of the rivet plug being removed using a tool for disassembling rivet plugs.

[0030] In the attached diagram: 1. Sleeve; 11. Anti-rotation hole; 12. Receiving cavity; 13. Guide hole; 14. First support surface; 15. Second support surface; 16. Torque application surface; 17. Flared mouth; 2. Tie rod; 21. Force-bearing threaded section; 22. Anti-rotation block; 23. Connecting rod; 24. Force-applying spiral section; 25. Chamfered corner; 3. Nut. Detailed Implementation

[0031] Example 1

[0032] like Figure 1 and Figure 2 The tool shown includes a sleeve 1, a pull rod 2, and a nut 3. The sleeve 1 includes a receiving cavity 12 and a guide hole 13 that extends from front to back. The receiving cavity 12 is located at the front end of the sleeve 1, and the guide hole 13 communicates with the receiving cavity 12. The front end of the sleeve 1 has a first support surface 14, which abuts against the end face of the component where the rivet plug is located when disassembling the rivet plug. The rear end of the sleeve 1 has a second support surface 15. The nut 3 engages with a force-bearing threaded section 21, and the front end face of the nut 3 fits against the second support surface 15 when disassembling the rivet plug.

[0033] like Figure 3 As shown, the front end of the pull rod 2 is provided with a force-applying threaded section 24 that can be connected to a rivet plug, and the rear end of the pull rod 2 is provided with a force-receiving threaded section 21; the pull rod 2 is slidably disposed in the guide hole 13; the force-applying threaded section 24 is disposed at one end close to the receiving cavity 12, and the force-receiving threaded section 21 is disposed at one end away from the receiving cavity 12.

[0034] The aforementioned rivet plug disassembly tool, when disassembling the rivet plug, connects the nut 3 with the force-bearing threaded section 21 on the pull rod 2, then aligns the top of the pull rod 2 with the rivet plug placed in the process hole, so that the force-bearing threaded section 24 connects with the rivet plug threadedly. At this time, the sleeve 1 is fixed and the nut 3 is rotated so that the front end face of the nut 3 and the second support surface 15, the first support surface 14 and the end face of the process hole all abut against each other. Continue to rotate the nut 3 so that the pull rod 2 applies a backward pulling force to the rivet plug, pulling the rivet plug outward, thereby achieving the effect of disassembling the rivet plug.

[0035] likeFigure 2 and Figure 3 As shown, the sleeve 1 also includes an anti-rotation hole 11, located at the end away from the receiving cavity 12, and communicating with the guide hole 13; the pull rod 2 also includes an anti-rotation block 22, which is slidably placed in the anti-rotation hole 11; the anti-rotation block 22 contacts the inner peripheral wall of the anti-rotation hole 11 circumferentially through its outer peripheral wall to prevent the pull rod 2 from rotating relative to the sleeve 1. The outer side of the sleeve 1 has a torque application surface 16, which is used to cooperate with a torque tool; the cross-section of the torque application surface 16 is quadrilateral, pentagonal, hexagonal, heptagonal, octagonal, nonagonal, decagonal, eleventh-sided, or dodecagonal.

[0036] When the nut 3 is rotated, the nut 3 applies a pulling force to the pull rod 2. Due to the abutment between the anti-rotation block 22 and the anti-rotation hole 11, the anti-rotation block 22 cannot rotate, so the pull rod 2 cannot rotate along with the rotation of the nut 3. At this time, the pull rod 2 slides relative to the sleeve 1, thereby removing the rivet plug.

[0037] When the anti-rotation block 22 abuts against the rear end face of the guide hole 13, the length of the force-bearing thread section 21 inside the anti-rotation hole 11 is greater than the length of the rivet plug.

[0038] At this time, the nut 3 is tightly fitted with the sleeve 1, and the front end of the nut 3 abuts against the second support surface 15. The nut 3 is threadedly engaged with the force-bearing thread section 21. The length of the force-bearing thread section 21 located in the anti-rotation hole 11 needs to be greater than the length of the rivet plug, so that there is enough length to pull out the rivet plug and place the rivet plug in the receiving cavity 12 to prevent the entire force-bearing thread section 21 from rotating out and still not being enough to pull out the rivet plug, resulting in incomplete disassembly.

[0039] like Figure 5 As shown, the anti-rotation hole 11 has a hexagonal prism inner surface, and the anti-rotation block 22 has a hexagonal prism outer surface; the outer surface of the anti-rotation block 22 slides relative to the inner surface of the anti-rotation hole 11. In addition, the anti-rotation hole 11 and the anti-rotation block 22 have the same polygonal cross-section.

[0040] The outer surface of the anti-rotation block 22 is tightly fitted to the inner wall of the hexagonal hole of the anti-rotation hole 11. When the nut 3 is rotated, the pulling force applied by the nut 3 to the pull rod 2 causes the anti-rotation block 22 to move together. Due to the cooperation between the anti-rotation block 22 and the anti-rotation hole 11, the anti-rotation block 22 slides on the inner wall of the anti-rotation hole 11.

[0041] like Figure 3As shown, the pull rod 2 further comprises a connecting rod 23; the end of the connecting rod 23 is provided with a force applying threaded section 24, and the other end of the connecting rod 23 is connected with the anti-rotation block 22; the front end of the force applying threaded section 21 and the rear end of the anti-rotation block 22 are integrally connected, the front end of the anti-rotation block 22 and the rear end of the connecting rod 23 are integrally connected, and the front end of the connecting rod 23 and the rear end of the force applying threaded section 24 are integrally connected.

[0042] The connecting rod 23 passes through the guide hole 13, and the force applying threaded section 24 at the end of the connecting rod 23 passes through the accommodating cavity 12 and is in threaded cooperation with the pull rivet plug in the process hole; when the nut 3 exerts a pulling force on the pull rod 2, the force applying threaded section 24 is driven to exert a pulling force on the pull rivet plug towards the nut 3, so as to gradually pull out the pull rivet plug.

[0043] The accommodating cavity 12 is a cylindrical cavity; the diameter of the accommodating cavity 12 is greater than the diameter of the pull rivet plug, and the depth of the accommodating cavity 12 is longer than the length of the pull rivet plug.

[0044] The force applying threaded section 24 drives the pull rivet plug, so that the disassembled pull rivet plug is placed in the accommodating cavity 12.

[0045] As shown in the drawings, Figure 4 The anti-rotation block 22 and the connecting rod 23 are provided with a guide angle portion 25; the rear end of the guide hole 13 is provided with a flared mouth 17; and the guide angle portion 25 can be accommodated in the flared mouth 17.

[0046] The guide angle portion 25 and the flared mouth 17 cooperate to reduce the friction between the anti-rotation block 22 and the inner walls of the anti-rotation hole 11 and the guide hole 13, so as to avoid the cracking of the anti-rotation block 22.

[0047] A sliding gap is provided between the inner wall of the guide hole 13 and the outer wall of the connecting rod 23, and the width of the sliding gap is 0.02-0.3mm.

[0048] The sliding gap allows the connecting rod 23 to smoothly slide in the guide hole 13, while preventing radial shaking.

Claims

1. A pull-rivet plug removal tool characterized by: The utility model provides a detachable pull -in plug head device, including sleeve (1), pull rod (2), nut (3), sleeve (1) inside includes accommodating cavity (12) and front -back through -going guide hole (13), accommodating cavity (12) is located sleeve (1) front end, guide hole (13) is communicated with accommodating cavity (12), pull rod (2) front end is equipped with the force exerting threaded section (24) that can connect pull -in plug head, pull rod (2) rear end is equipped with force threaded section (21), pull rod (2) can be slidably arranged in guide hole (13), force exerting threaded section (24) is equipped with near one end of accommodating cavity (12), force threaded section (21) is equipped with one end away from accommodating cavity (12), sleeve (1) front end has first support surface (14), when pull -in plug head is dismantled, first support surface (14) abuts the end surface of the component where pull -in plug head is located, sleeve (1) rear end has second support surface (15), nut (3) is cooperated with force threaded section (21), when pull -in plug head is dismantled, the front end surface of nut (3) is attached second support surface (15).

2. A tool for removing a plug from a rivet according to claim 1, wherein: Sleeve (1) still includes anti -rotation hole (11) in, anti -rotation hole (11) is located one end away from accommodating cavity (12), anti -rotation hole (11) is communicated with guide hole (13), pull rod (2) still includes anti -rotation block (22), anti -rotation block (22) can be slidably placed in anti -rotation hole (11), anti -rotation block (22) passes through its outer peripheral wall and the circumferential contact of the inner peripheral wall of anti -rotation hole (11) to prevent pull rod (2) relative sleeve (1) rotation.

3. A tool for removing a plug from a rivet according to claim 2, wherein: Anti -rotation hole (11) has the inner surface of six prism, anti -rotation block (22) has the outer surface of six prism, the outer surface of anti -rotation block (22) is slidably fitted relative to the inner surface of anti -rotation hole (11).

4. A tool for removing a plug from a rivet according to claim 2, wherein: Pull rod (2) still includes connecting rod (23), the end of connecting rod (23) is equipped with force exerting threaded section (24), the other end of connecting rod (23) is connected with anti -rotation block (22), the front end of force threaded section (21) and the rear end of anti -rotation block (22) are integrally connected, the front end of anti -rotation block (22) and the rear end of connecting rod (23) are integrally connected, the front end of connecting rod (23) and the rear end of force exerting threaded section (24) are integrally connected.

5. A tool for removing a plug from a rivet according to claim 1, wherein: Accommodating cavity (12) is cylindrical cavity, the diameter of accommodating cavity (12) is greater than the diameter of pull -in plug head, the depth of accommodating cavity (12) is longer than the length of pull -in plug head.

6. A tool for removing a plug from a rivet according to claim 1, wherein: The outside of sleeve (1) has torque exerting surface (16), torque exerting surface (16) is used for cooperating with torque tool, the section of torque exerting surface (16) is quadrilateral, pentagonal, hexagonal, heptagonal, octagonal, nonagonal, decagonal, hendecagonal or dodecagonal.

7. A tool for removing a plug from a rivet according to claim 4, wherein: There is guide angle part (25) between anti -rotation block (22) and connecting rod (23), the rear end of guide hole (13) has flared mouth (17), guide angle part (25) can be accommodated in flared mouth (17).

8. A tool for removing a plug from a rivet according to claim 1, wherein: The inner wall of guide hole (13) and the outer wall of connecting rod (23) are equipped with sliding gap, the width of sliding gap is 0.02-0.3mm.

9. A tool for removing a plug from a rivet according to claim 2, wherein: The length of the force-receiving threaded section (21) in the anti-rotation hole (11) is greater than the length of the pull-rivet plug when the anti-rotation block (22) abuts against the rear end face of the guide hole (13).

10. A tool for removing a plug from a rivet according to claim 2, wherein: The anti-rotation hole (11) and the anti-rotation block (22) have polygonal cross sections of the same shape.

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