High-strength fastening bolt and dismounting equipment thereof

Abstract

The present application relates to a kind of high-strength fastening bolt and its dismounting equipment, wherein, high-strength fastening bolt is realized larger expansion range by the design of unique expansion sleeve set, especially the design of upper sleeve body, lower sleeve body and expansion strip, when screw body is rotated into the internal thread sleeve of lower sleeve body and reaches the innermost end, then rotate screw body, since screw body cannot enter again, then internal thread sleeve will move together with lower sleeve body towards expansion strip, lower sleeve body close to upper sleeve body will cause expansion strip to expand outward, the expansion range is larger, can adapt to different aperture size.The sharp claw on claw plate helps to fix expansion sleeve set, prevent it from displacement during installation, and the special dismounting equipment specially used for the high-strength fastening bolt can efficiently and conveniently dismount screw body and expansion sleeve set, reduce the risk of damage to hole structure.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, in particular to a high-strength fastening bolt and a disassembling device thereof. Background Art

[0002] In mechanical assembly, fasteners are key components used to secure two or more components (e.g., Part A and Part B) together. Bolts, as a common fastener, are widely used in various engineering scenarios. Traditional bolted connections typically involve drilling holes directly into Parts A and B and threading bolts through these holes to achieve fastening. However, this traditional method often faces challenges when working with components of varying thickness, material, and hole diameter.

[0003] To address these issues, expansion kits have been introduced into bolted connections. These kits can adapt to varying hole sizes to a certain extent, providing a more stable fastening effect. However, existing expansion kits and their use methods still have some shortcomings:

[0004] 1. Limited expansion range: Expansion kits currently on the market often have a fixed expansion range, which limits their ability to handle a wide range of aperture changes. As a result, in actual applications, it may be necessary to prepare expansion kits of multiple specifications to cope with different working conditions, increasing material costs and management complexity.

[0005] 2. Difficulty in Removal: Once the expansion kit is installed, its removal is often complicated. Since the expansion kit tightly fills the hole after expansion, it is difficult to effectively remove it with conventional tools. Forcible removal may damage the hole in the component, affecting subsequent use or maintenance.

[0006] 3. Lack of dedicated disassembly and assembly equipment: In the existing technology, there are few dedicated disassembly and assembly tools designed for expansion kits. In most cases, operations rely on general tools, which is not only inefficient but also prone to damage to the expansion kit or hole structure due to improper operation.

[0007] Against this backdrop, the present invention proposes a high-strength fastening bolt and its associated assembly and disassembly equipment. These devices aim to overcome the aforementioned shortcomings of existing technologies, offering a solution with a wider expansion range, ease of disassembly, and minimal damage to the hole structure. Through their innovative design, these fastening bolts and their assembly and disassembly equipment significantly improve assembly efficiency and quality, making them suitable for a wider range of industrial applications. Summary of the Invention

[0008] The present invention provides a high-strength fastening bolt and a disassembling and assembling device thereof, which solve the above-mentioned problems existing in the use process of the prior art.

[0009] The technical solution of the present invention is implemented as follows: a high-strength fastening bolt, characterized in that it includes a screw body and an expansion sleeve, the expansion sleeve includes an upper sleeve, a lower sleeve and an expansion strip integrally formed between the upper sleeve and the lower sleeve, the expansion strips are equidistantly arranged at least three times between the upper sleeve and the lower sleeve at a circumferential distance, an internal threaded sleeve is fixedly connected to the lower sleeve, the internal threaded sleeve is used for the screw body to thread through, and each of the expansion strips has a pressure strip slot along its length direction, the pressure strip slot penetrates the upper sleeve upward and passes through the upper end of the upper sleeve, the upper end of the upper sleeve is integrally formed with a claw plate with the same number as the expansion strip, each adjacent claw plate is separated by a claw plate opening, the pressure strip slot passes through the claw plate opening, and each claw plate is integrally formed with a downwardly protruding sharp claw.

[0010] Preferably, each claw plate is fixedly connected to a removal frame on its upper side, and a removal socket is provided on the removal frame, and the removal socket is arc-shaped and passes through the removal frame.

[0011] Preferably, the high-strength fastening bolt also includes an expansion gasket, a screw head is integrally formed at the upper end of the screw body, the expansion gasket is located between the screw head and the upper end of the upper sleeve, the lower end of the expansion gasket is integrally formed with an expansion sleeve, the expansion sleeve is inserted into the upper sleeve, a movable threaded sleeve is provided in the upper sleeve for sliding up and down, the movable threaded sleeve is located on the lower side of the expansion sleeve, the expansion gasket is provided with a removal notch near its outer edge, the number of the removal notches is the same as the opening between the claw plates, and each of the removal notches is correspondingly placed on one side of the opening between each claw plate.

[0012] Preferably, a plurality of vertical slides extending from top to bottom are integrally formed on the outer side wall of the movable threaded sleeve, and an inner convex ring seat is integrally formed on the inner side of the upper sleeve. A sliding groove is provided on the inner convex ring seat corresponding to the vertical slides extending from top to bottom, and the vertical slides slide up and down and fit in the sliding groove.

[0013] Preferably, the outer side wall of the movable threaded sleeve is also integrally formed with a plurality of buckle groups extending from top to bottom, each of the buckle groups includes a plurality of inclined protruding blocks arranged in sequence from top to bottom, and a buckle slot group is provided on the inner convex ring seat corresponding to the buckle group, each of the buckle slot groups includes a plurality of inclined slots arranged in sequence from top to bottom and used for the inclined protruding blocks to be snapped into.

[0014] Preferably, the expansion sleeve includes an inner recess, an outer convex portion and a lower supporting ring. The inner recess is provided with two and is respectively located on the upper and lower sides of the outer convex portion. The lower supporting ring is located below the lowermost inner recess and is used to support the upper end of the movable threaded sleeve.

[0015] Preferably, the middle part of the expansion strip is convex toward the outside to form a bent protrusion, and the expansion strip is provided with a bent recessed portion concave toward the inside on the upper and lower ends near the upper sleeve and the lower sleeve, and the pressure strip slot passes downward over the bent protrusion, and the upper sleeve and the lower sleeve are both provided with an expansion splitting opening extending through the direction of the expansion strip.

[0016] This application also provides the following technical solutions:

[0017] A disassembly and assembly device is specially used for disassembling and assembling the above-mentioned high-strength fastening bolts, which includes a main handle, a connecting seat is rotatably connected to the lower end of the main handle, and a vertical hard pressure strip corresponding to the number and position of the pressure strip slots is fixedly connected to the lower end of the connecting seat. The vertical hard pressure strip is used to be inserted into the pressure strip slot. The outer side of the lower end of the main handle is integrally formed with a removal plug with the same number as the removal frame, and the removal plug is used to be inserted into the removal socket accordingly.

[0018] Preferably, a horizontal grip is integrally formed on the upper end of the main handle, one end of the horizontal grip is fixedly connected to a hammer head, and the other end of the horizontal grip is fixedly connected to a screwdriver head.

[0019] Preferably, the horizontal grip is further fixedly connected to an edge of one end of the screwdriver head with extraction hooks corresponding to the number and position of the extraction notches, and the extraction hooks can pass through the corresponding extraction notches.

[0020] In summary, the beneficial effects of the present invention are:

[0021] 1. The high-strength fastening bolt in this invention achieves a wide expansion range through the unique expansion sleeve design, specifically the upper sleeve, lower sleeve, and expansion bar. When the screw body is screwed into the internally threaded sleeve within the lower sleeve and reaches its innermost end, the screw body is rotated. Since the screw body cannot enter further, the internally threaded sleeve drives the lower sleeve toward the expansion bar. As the lower sleeve approaches the upper sleeve, the expansion bar expands outward. This wide expansion range accommodates various aperture sizes. The sharp claws on the claw plate help secure the expansion sleeve and prevent it from shifting during installation.

[0022] 2. The design of the pressure strip slot and removal frame increases the convenience of disassembly.

[0023] 3. The removable threaded sleeve on the expansion gasket provides additional expansion effect, further enhancing the connection strength, and the expansion gasket is also easy to remove.

[0024] 4. The specialized disassembly and assembly equipment for the present invention's high-strength fastening bolts enables efficient and convenient removal of the screw body and expansion sleeve, reducing the risk of damage to the hole structure. The hammer and screwdriver heads on the horizontal grip allow the tool to not only be used for disassembly and assembly of the expansion sleeve, but also assist in operations such as hammering and screwing, improving work efficiency. The extraction hook is specifically designed to mate with the extraction notch on the expansion gasket, ensuring effective force application during removal and facilitating extraction of the expansion gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of the overall structure of the high-strength fastening bolt in the present invention;

[0027] Figure 2 for Figure 1 A top view of

[0028] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0029] Figure 4 for Figure 3 A detailed enlarged schematic diagram of the upper middle part;

[0030] Figure 5 for Figure 1 Schematic diagram of the structural explosion;

[0031] Figure 6 for Figure 1 Schematic diagram of the structure after removing the screw body;

[0032] Figure 7 for Figure 1 Schematic diagram of the structure where the movable threaded sleeve is exploded after removing the screw body and the expansion gasket;

[0033] Figure 8 This is a schematic diagram of the overall structure of the special disassembly and assembly equipment in the present invention;

[0034] Figure 9 for Figure 8 Schematic diagram of the structure when observed from another angle;

[0035] Figure 10 for Figure 8 A top view of

[0036] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure along the BB direction.

[0037] Figure: 10, screw body; 11, screw head; 20, expansion kit; 21, upper housing; 211, inner convex ring seat; 212, slide groove; 213, inclined slot; 22, lower housing; 23, expansion strip; 231, pressure strip slot; 232, bent protrusion; 233, bent recess; 24, internal threaded sleeve; 25, claw plate; 251, sharp claw; 252, extraction frame; 253, extraction socket; 26, claw plate opening ; 27. Expanding split opening; 30. Inflatable gasket; 31. Removing notch; 32. Expanding sleeve; 321. Inner concave portion; 322. Outer convex portion; 323. Lower supporting ring; 40. Movable threaded sleeve; 41. Vertical slide bar; 42. Inclined raised block; 51. Main handle; 52. Connecting seat; 53. Vertical hard pressure strip; 54. Removing plug; 55. Horizontal grip; 56. Hammer head; 57. Screwdriver head; 58. Removing hook. DETAILED DESCRIPTION

[0038] The following is a combination of the embodiments of the present invention Figures 1-11 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] Example:

[0040] like Figures 1 to 7As shown, the present invention discloses a high-strength fastening bolt, including a screw body 10 and an expansion sleeve 20. The expansion sleeve 20 is preferably made of a metal or plastic material with a certain elastic deformation ability to achieve an expansion function, while ensuring a certain mechanical strength to withstand the stress during the installation process, such as low-carbon steel with a structural strength increased by heat treatment. The expansion sleeve 20 specifically includes an upper sleeve 21, a lower sleeve 22 and an expansion strip 23 integrally formed between the upper sleeve 21 and the lower sleeve 22. In this embodiment, three expansion strips 23 are equidistantly arranged circumferentially between the upper sleeve 21 and the lower sleeve 22. In addition, an internal threaded sleeve 24 is fixedly connected to the lower sleeve 22. The internal threaded sleeve 24 is used to The screw body 10 is threadedly fitted and passed through, and one side of the lower end of the internal threaded sleeve 24 is fixedly connected to the lower sleeve body 22. In addition, there is a gap between the internal threaded sleeve 24 and the lower sleeve body 22. In addition, each expansion strip 23 has a layering slot 231 on the outside along its length direction. These layering slots 231 penetrate upward into the upper sleeve body 21 and pass through the upper end of the upper sleeve body 21. At the upper end of the upper sleeve body 21, there are claw plates 25 with the same number as the expansion strips 23. There is a claw plate opening 26 between each adjacent claw plate 25, and the layering slots 231 pass through the claw plate opening 26. Among them, each claw plate 25 is integrally formed with a downwardly protruding sharp claw 251, and the sharp claw 251 is locally quenched to increase the hardness.

[0041] In the present invention, a removal frame 252 is fixedly connected to the upper side of each claw plate 25 , and removal sockets 253 are opened on the removal frame 252 . These removal sockets 253 are arc-shaped and penetrate the removal frame 252 .

[0042] Further, such as Figures 3 to 7 As shown, the high-strength fastening bolt of the present invention also includes an expansion gasket 30, and a screw head 11 is integrally formed at the upper end of the screw body 10, and the expansion gasket 30 is located between the screw head 11 and the upper end of the upper sleeve 21, and an expansion sleeve 32 is integrally formed at the lower end of the expansion gasket 30, and the expansion sleeve 32 is inserted into the upper sleeve 21, and a movable threaded sleeve 40 is provided to slide up and down in the upper sleeve 21, and the movable threaded sleeve 40 is located at the lower side of the expansion sleeve 32. In addition, the expansion gasket 30 is provided with a removal notch 31 at a position near its outer edge, and the number of the removal notches 31 is the same as the claw plate opening 26. When the expansion gasket 30 is installed on the upper sleeve 21, each removal notch 31 is placed on one side of each claw plate opening 26, so that the subsequent removal hook 58 can pass through.

[0043] like Figure 7As shown, in order to ensure that the movable threaded sleeve 40 can only slide up and down in the upper sleeve body 21, three vertical slides 41 extending from top to bottom are integrally formed on the outer wall of the movable threaded sleeve 40, and an inner convex ring seat 211 is integrally formed on the inner side of the upper sleeve body 21. A slide groove 212 is provided on the inner convex ring seat 211 corresponding to the vertical slide 41 from top to bottom, and the vertical slide 41 slides up and down and fits in the slide groove 212.

[0044] Further, such as Figure 4 and Figure 7 As shown, three buckle groups extending from top to bottom are integrally formed on the outer wall of the movable threaded sleeve 40, each buckle group includes a plurality of inclined surface protruding blocks 42 arranged in sequence from top to bottom, and a buckle slot group is provided on the inner convex ring seat 211 corresponding to the buckle group, each buckle slot group includes a plurality of inclined surface slots 213 arranged in sequence from top to bottom and used for the inclined surface protruding blocks 42 to be snapped into. The arrangement of the buckle group and the buckle slot group ensures that the movable threaded sleeve 40 is fixed. In order to ensure the stability of the structure, at the beginning, the lowermost inclined protrusion block 42 is engaged in the lowermost inclined groove 213. As the screw body 10 continues to rotate after being fully inserted, the movable threaded sleeve 40 moves upward, and the inclined protrusion block 42 passes over the protrusions between the inclined grooves 213 and enters the upper inclined groove 213, giving a sense of frustration. When the user needs to operate the movable threaded sleeve 40 to move a specified distance upward, the sense of frustration can provide a reference for the user.

[0045] Among them, Figure 4 and Figure 5 As shown, the expansion sleeve 32 specifically includes an inner recess 321, an outer protrusion 322, and a lower supporting ring 323. There are two inner recesses 321, one located on the upper and lower sides of the outer protrusion 322. This structure facilitates the outer protrusion 322 to expand outward when the expansion sleeve 32 is squeezed. The lower supporting ring 323 is located below the lowermost inner recess 321 and is used to abut against the upper end of the movable threaded sleeve 40. When the movable threaded sleeve 40 moves upward, the movable threaded sleeve 40 squeezes the lower supporting ring 323 upward, thereby squeezing the outer protrusion 322 outward. The outer protrusion 322 acts on the upper sleeve 21, causing the upper sleeve 21 to expand.

[0046] In the present invention, Figure 5As shown, the middle part of the expansion strip 23 is convex toward the outside to form a bent protrusion 232. In addition, the expansion strip 23 is provided with a bent recessed portion 233 concave toward the inside on the upper and lower ends near the upper sleeve 21 and the lower sleeve 22. This structure is also convenient for the expansion strip 23 to expand outward when it is squeezed. It should be noted that the pressure strip slot 231 passes downward over the bent protrusion 232. This structure facilitates the subsequent disassembly and assembly of the vertical hard pressure strip 53 in the device to pass over the bent protrusion 232 when inserted, so that the bent protrusion 232 is deformed inward, When the expansion kit 20 is pulled out, in order to facilitate the expansion of the upper sleeve 21 and the lower sleeve 22, thereby expanding the expansion range of the expansion strip 23, an expansion split opening 27 is provided on the upper sleeve 21 and the lower sleeve 22, which extends toward the expansion strip 23. The expansion split opening 27 does not pass through the upper end of the upper sleeve 21, so as to avoid the upper end of the upper sleeve 21 from being excessively expanded, resulting in the subsequent vertical hard bead 53 being difficult to insert into the bead slot 231. In order to better insert the vertical hard bead 53, the lower end of the vertical hard bead 53 and the upper end of the bead slot 231 can be chamfered.

[0047] When installing the high-strength fastening bolts of the present invention, align the holes on the two items to be fixedly connected, and then insert the expansion sleeve 20 of the present application into the aligned holes. Then, knock the sharp claws 251 on the claw plate 25 into the item to be pressed by the claw plate 25, and then insert the expansion sleeve 32 on the expansion gasket 30 into the upper sleeve 21 in the expansion sleeve 20, and make the removal notch 31 on the expansion gasket 30 correspondingly placed on one side of the opening 26 between each claw plate, and then rotate the screw head 11 by the screwdriver head 57 to screw the screw body 10 into the expansion sleeve 20. The screw body 10 is threadedly matched with the movable threaded sleeve 40 in the upper sleeve 21 and the internal threaded sleeve 24 in the lower sleeve 22. As the screw body 10 continues to rotate, the screw head is pressed against the expansion gasket 30. When the screw body 10 is rotated again, since the screw body 10 can no longer enter, as the screw body 10 rotates, the movable threaded sleeve 40 and the internal threaded sleeve 24 will be driven to move upward. In the process of the internal threaded sleeve 24 moving upward, the lower sleeve 22 will be driven to move upward together. The lower sleeve 22 will be close to the upper sleeve 21, which will cause the expansion strip 23 to expand outward. The expansion range is large and the application range is wide. In the process of the movable threaded sleeve 40 moving upward, the expansion sleeve 32 on the expansion gasket 30 will be compressed. The expansion sleeve 32 is compressed and expanded, acting on the upper sleeve 21, causing the upper sleeve 21 to expand, achieving a high-strength connection effect.

[0048] like Figures 8 to 11As shown, the present application also provides a disassembly and assembly device, which is specially used for disassembling and assembling the above-mentioned high-strength fastening bolts, which includes a main handle 51, and a connecting seat 52 is rotatably connected to the lower end of the main handle 51. The lower end of the connecting seat 52 is fixedly connected to a vertical hard pressure strip 53 corresponding to the number and position of the pressure strip slot 231. The vertical hard pressure strip 53 is made of a metal with high hardness and strength, which is not easy to deform and break, such as tool steel (Cr12MoV, D2, etc.) or high-speed steel (W18Cr4V) that has undergone an appropriate heat treatment process. The vertical hard pressure strip 53 is used to be inserted into the pressure strip slot 231. When the vertical hard pressure strip 53 is inserted into the pressure strip slot 231 and passes over the bent protrusion 232, the bent protrusion 232 can be deformed inward. In addition, a removal plug 54 with the same number as the removal frame 252 is integrally formed on the outer side of the lower end of the main handle 51. The removal plug 54 is used to be inserted into the removal socket 253 accordingly.

[0049] In addition, in the present invention, a horizontal grip 55 is integrally formed at the upper end of the main handle 51, and a hammer head 56 is fixedly connected to one end of the horizontal grip 55. The hammer head 56 is used to knock the claw plate 25 when installing the expansion kit 20, so that the sharp claws 251 on the claw plate 25 are inserted into the object to be connected. In addition, a screwdriver head 57 is fixedly connected to the other end of the horizontal grip 55, and the screwdriver head 57 is used to screw the screw head 11.

[0050] In order to be able to pull out the expansion gasket 30, the horizontal handle 55 is also fixedly connected to the edge of one end of the fixed screwdriver head 57 with a pulling claw 58 corresponding to the number and position of the pulling notches 31, and the pulling claw 58 can pass through the corresponding pulling notches 31.

[0051] When the high-strength fastening bolt of the present invention needs to be disassembled, the screw head 11 is first rotated using the screwdriver head 57 on the disassembly and assembly equipment to remove the screw body 10. Then, the extraction hook 58 on the horizontal handle 55 is passed through the extraction notch 31 on the compression-expansion gasket 30. At this time, the screwdriver head 57 is located in the upper sleeve 21. Then, the horizontal handle 55 is rotated again to offset the extraction hook 58 from the extraction notch 31. Then, the compression-expansion gasket 30 can be pulled out upward. Then, the vertical hard pressure strip 53 of the connecting seat 52 on the main handle 51 is inserted into the pressure strip slot 231. As the vertical hard pressure strip 53 is inserted, the bent and expanded expansion strip 23 will be pressed inward. When the lower end of the main handle 51 reaches the upper side of the claw plate 25, the main handle 51 is rotated to make the removal plug 54 on the main handle 51 turn into the removal socket 253 of the removal frame 252. Then, grab the horizontal handle 55 and pull it upward to pull the expansion kit 20 upward. Using this tool to remove the screw body 10 and the expansion kit 20 can reduce the risk of damage to the hole structure.

[0052] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-strength fastening bolt, characterized in that: The expansion sleeve comprises a screw body, an expansion kit and an expansion gasket, the expansion kit comprises an upper sleeve, a lower sleeve and an expansion strip integrally formed between the upper sleeve and the lower sleeve, at least three expansion strips are equidistantly arranged circumferentially between the upper sleeve and the lower sleeve, an internal threaded sleeve is fixedly connected to the lower sleeve, the internal threaded sleeve is used for the screw body to thread through, and each expansion strip has a beading slot along its length direction on the outside, the beading slot penetrates the upper sleeve upward and passes through the upper end of the upper sleeve, the upper end of the upper sleeve is integrally formed with a claw plate with the same number as the expansion strip, each adjacent claw plate is separated by a claw plate opening, the beading slot passes through the claw plate opening, and each claw plate is integrally formed It is formed with downwardly protruding sharp claws, and each of the claw plates is fixedly connected to a removal frame on the upper side, and a removal socket is provided on the removal frame, and the removal socket is arc-shaped and passes through the removal frame, and a screw head is integrally formed at the upper end of the screw body, and the expansion gasket is located between the screw head and the upper end of the upper sleeve, and an expansion sleeve is integrally formed at the lower end of the expansion gasket, and the expansion sleeve is inserted into the upper sleeve, and a movable threaded sleeve is provided in the upper sleeve for sliding up and down, and the movable threaded sleeve is located on the lower side of the expansion sleeve, and a removal notch is provided on the expansion gasket near its outer edge, and the number of the removal notches is the same as the opening between the claw plates, and each of the removal notches is correspondingly placed on one side of the opening between each claw plate.

2. A high-strength fastening bolt according to claim 1, characterized in that: The outer side wall of the movable threaded sleeve is integrally formed with a plurality of vertical slides extending from top to bottom, and the inner side of the upper sleeve is integrally formed with an inner convex ring seat, and the inner convex ring seat is provided with a slide groove corresponding to the vertical slide from top to bottom, and the vertical slide slides up and down and fits in the slide groove.

3. The high-strength fastening bolt according to claim 2, characterized in that: The outer side wall of the movable threaded sleeve is also integrally formed with a plurality of buckle groups extending from top to bottom, and each of the buckle groups includes a plurality of inclined protruding blocks arranged in sequence from top to bottom. A buckle slot group is provided on the inner convex ring seat corresponding to the buckle group, and each of the buckle slot groups includes a plurality of inclined slots arranged in sequence from top to bottom and used for the inclined protruding blocks to be snapped into.

4. The high-strength fastening bolt according to claim 1, characterized in that: The expansion sleeve includes an inner recess, an outer convex portion and a lower supporting ring. The inner recess is provided with two and is respectively located on the upper and lower sides of the outer convex portion. The lower supporting ring is located below the lowermost inner recess and is used to support the upper end of the movable threaded sleeve.

5. The high-strength fastening bolt according to claim 1, characterized in that: The middle part of the expansion strip is convex toward the outside to form a bent protrusion, and the expansion strip is provided with a bent recessed portion concave toward the inside on the upper and lower ends near the upper sleeve and the lower sleeve. The pressure strip slot passes downward over the bent protrusion, and the upper sleeve and the lower sleeve are both provided with an expansion splitting opening that passes through in the direction of the expansion strip.

6. A disassembly and assembly device, specifically used for disassembling and assembling the high-strength fastening bolt according to any one of claims 1 to 5, characterized in that: The tool holder is fixedly connected to the bottom of the handle and has a screwdriver head at the other end, and a removal hook corresponding to the number and position of the removal notches is fixedly connected to the edge of one end of the handle, and the removal hook can pass through the corresponding removal notches.

Images