Detachable expansion bolt

Abstract

The invention discloses a detachable expansion bolt, and belongs to the field of expansion bolts, the detachable expansion bolt comprises a bolt and a nut in threaded connection with the outer side of the bolt, a fastening part is arranged in an expansion tube, the fastening part comprises a fixing disc fixedly connected to the bottom end of the bolt, and a push ring is slidably connected in the expansion tube. According to the device, after being extruded by the push ring, the arranged supporting block extrudes the interior of the external hole wall, locking is unlocked after the push ring is far away from the extrusion block, and the fixing disc is in extrusion contact with the lower side of the fixing disc after the fixing disc moves upwards, and the multiple moving grooves are formed in the inner wall of the expansion pipe. Due to the fact that the expansion pipe and the bolt in the expansion pipe are locked on the inner wall of the external hole wall through extrusion of the supporting block on the inner wall of the external hole wall, and the expansion pipe does not deform, the expansion pipe can still be used after being detached, the service life of the bolt and the expansion pipe is guaranteed, and unnecessary economic losses caused by damage of the expansion pipe are avoided.

Description

Technical Field

[0001] The invention relates to the field of expansion bolts, and more particularly to a detachable expansion bolt. Background Art

[0002] Expansion bolts, also known as expansion plugs, are mainly composed of bolts and expansion tubes. When they are tightened, the tail of the bolt will cause the expansion tube to expand, and then use the friction between the expansion tube and the hole wall to achieve the tightening effect. This fastening method is widely used in various occasions that require a firm connection due to its high friction and stability. The standard expansion bolt design is mainly for tightening and maintaining its connection state for a long time;

[0003] However, in some special cases, there are some specially designed expansion bolts on the market, which are indeed easy to disassemble. The purposes of such designs may include: Maintenance or replacement: It is convenient for regular maintenance, inspection or replacement of equipment or components. If the connecting parts need to be replaced or repaired frequently, then using expansion bolts that are easy to disassemble will greatly improve work efficiency; Reusability: Some expansion bolts are designed to be reused, which reduces costs, especially in situations where frequent disassembly and reinstallation are required; Adapting to changes: In some applications, the connection points may need to be adjusted as the conditions of use change, and expansion bolts that are easy to disassemble make such adjustments easier.

[0004] In the prior art, since the workers need to carry tools such as wrenches and pliers, especially pliers, during the removal process of the expansion bolts, after the nut is loosened by the wrench, the expansion tube needs to be pulled out from the inside of the hole wall by pliers, resulting in the installation and disassembly process of the expansion bolts being more cumbersome. At the same time, after the expansion tube is squeezed and expanded, it is difficult to take it out from the reserved hole. Summary of the invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a detachable expansion bolt.

[0006] To solve the above problem, the present invention adopts the following technical solution, which can achieve locking of the support block on the inner wall of the external hole wall by squeezing the support block on the inner wall of the external hole wall, while the expansion tube itself does not deform, so that the expansion tube can continue to be used after being disassembled.

[0007] A detachable expansion bolt comprises a bolt and a nut threadedly connected to the outer side of the bolt, an expansion tube is sleeved on the outer side of the bolt, a gasket is sleeved on the outer side of the bolt, the nut is pressed and contacted with the upper side of the gasket after rotation, and a fastening component is arranged inside the expansion tube;

[0008] The fastening component includes a fixed plate fixedly connected to the bottom end of the bolt, a push ring is slidably connected to the inside of the expansion tube, a movable groove is opened on the inner wall of the expansion tube, and the number of movable grooves is multiple, and the multiple movable grooves are arranged in a circular array, and the interiors of the multiple movable grooves are slidably connected to support blocks, and the sides of the multiple support blocks close to the push ring are squeezed and contacted with the outer side of the push ring, and the outer surface of the push ring is provided with a slope, and the number of slopes is multiple.

[0009] Furthermore, a reset component is provided inside the expansion tube, and the reset component includes a magnetic block fixedly installed inside the push ring, and the number of the magnetic blocks is multiple.

[0010] Furthermore, the positions of the multiple magnetic blocks respectively correspond to the positions of the multiple support blocks, the support blocks are made of magnetic metal, the shape of the movable grooves is adapted to the shape of the support blocks, and slide grooves are provided on both sides of the interior of the multiple movable grooves, and the number of the slide grooves on a single side is multiple. Slide blocks are fixedly connected to the two sides corresponding to the support blocks and the movable grooves, and the multiple slide blocks are respectively slidably connected in the multiple slide grooves.

[0011] Furthermore, a pulling assembly is provided inside and on the upper side of the expansion tube, and the pulling assembly includes a rotating disk in sliding contact with the upper side of the expansion tube.

[0012] Furthermore, a rotating ring is fixedly connected to the lower side of the rotating disk, and the rotating ring is rotatably connected to the upper side of the expansion tube.

[0013] Furthermore, a disassembly component is provided on the upper side of the turntable, and the disassembly component includes a rotation groove opened on the upper side of the turntable, and the number of the rotation grooves is two.

[0014] Furthermore, the diameter of the rotating groove on the outside is larger than the diameter of the rotating groove on the inside, a guide groove is opened on the upper side of the turntable, and there are two guide grooves, the two rotating grooves are connected through the guide groove, and a guide block is slidably connected in the rotating groove on the inside, and there are two guide blocks, the guide block slides from the inner rotating groove into the outer guide groove through the guide groove, the upper sides of the two guide blocks are fixedly connected with a fixing seat, the upper sides of the two fixing seats are fixedly connected with a column, the outer sides of the two columns are slidably connected with a positioning ring, the lower sides of the two positioning rings are respectively pressed and contacted with the upper sides of the two fixing seats, and the two positioning rings are wrapped around the outside of the same nut.

[0015] Furthermore, the gasket is overlapped on the upper side of the turntable, and a lubrication assembly is provided above the turntable. The lubrication assembly includes storage cavities opened inside two positioning rings, and the number of storage cavities inside a single positioning ring is two.

[0016] Furthermore, the four storage chambers are slidably connected to the inside thereof with an extrusion column, the extrusion column passes through the lower side of the positioning ring, the inner surfaces of the two positioning rings are provided with liquid outlets, the number of liquid outlets provided on the inner surface of a single positioning ring is two, and the four storage chambers are respectively connected to the four liquid outlets.

[0017] Furthermore, a rubber membrane is fixedly installed inside the liquid outlet, a cross-shaped gap is opened through the surface of the rubber membrane, and the upper part of the extrusion column is adapted to the shape of the storage cavity.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The support block provided in the present invention will squeeze the inside of the external hole wall after being squeezed by the push ring, and the push ring will be unlocked after it moves away from the squeezing block. Since the expansion tube and the bolts inside it are locked to the inner wall of the external hole wall by squeezing the inner wall of the external hole wall by the support block, and the expansion tube itself is not deformed, the expansion tube can continue to be used after being disassembled, which not only ensures the service life of the bolts and the expansion tube, but also avoids unnecessary economic losses caused by damage to the expansion tube.

[0020] (2) The present invention uses a magnetic block to adsorb the support block, so that when the push ring moves away from the support block, the support block adsorbed by the magnetic block slides inside the movable groove and releases the lock on the inner wall of the external hole wall. When the nut is rotated in the reverse direction to release the support of the support block by the push ring, the magnetic block inside the push ring will also adsorb the support block, so that the support block quickly enters the movable groove, effectively reducing the friction between the expansion tube and the inner wall of the external hole wall, making it easier to disassemble and install the expansion tube and the bolt.

[0021] (3) The present invention provides a turntable that can be used to pull the expansion tube after the support block is unlocked from the external hole wall. Since no other tools are needed to pull and squeeze the expansion tube when taking it out from the external hole wall, deformation or wear of the expansion tube caused by other tools is effectively avoided, simplifying the steps for taking out the expansion tube, and the expansion tube can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-section structure of the present invention;

[0024] Figure 3 It is a schematic cross-sectional structural diagram of the expansion tube of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the turntable of the present invention;

[0026] Figure 5It is a schematic cross-sectional structural diagram of a turntable of the present invention;

[0027] Figure 6 It is a schematic diagram of the positioning ring structure of the present invention;

[0028] Figure 7 It is a schematic cross-sectional structural diagram of the positioning ring of the present invention;

[0029] Figure 8 For the present invention Figure 7 An enlarged schematic diagram of point A.

[0030] Description of the numbers in the figure:

[0031] 1. Bolts; 2. Nuts; 3. Expansion tubes; 4. Fastening components; 41. Fixed disk; 42. Push ring; 43. Moving groove; 44. Support block; 45. Reset assembly; 451. Magnetic block; 452. Slide groove; 453. Slider; 46. Pull assembly; 461. Turntable; 462. Rotating ring; 5. Disassembly and assembly components; 51. Rotating groove; 52. Guide groove; 53. Guide block; 54. Fixed seat; 55. Column; 56. Positioning ring; 57. Lubrication assembly; 571. Storage chamber; 572. Extrusion column; 573. Liquid outlet; 574. Rubber membrane; 6. Gasket. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 8 A detachable expansion bolt 1 comprises a bolt 1 and a nut 2 threadedly connected to the outside of the bolt 1, an expansion tube 3 is sleeved on the outside of the bolt 1, a gasket 6 is sleeved on the outside of the bolt 1, the nut 2 is pressed and contacted with the upper side of the gasket 6 after rotation, and a fastening component 4 is provided inside the expansion tube 3;

[0034] The fastening component 4 includes a fixed plate 41 fixedly connected to the bottom end of the bolt 1, a push ring 42 is slidably connected to the inside of the expansion tube 3, a movable groove 43 is opened on the inner wall of the expansion tube 3, and the number of the movable grooves 43 is multiple, and the multiple movable grooves 43 are arranged in a circular array, and the insides of the multiple movable grooves 43 are all slidably connected to support blocks 44, and the sides of the multiple support blocks 44 close to the push ring 42 are all in extrusion contact with the outer side of the push ring 42, and the outer surface of the push ring 42 is provided with a bevel, and the number of the bevels is multiple.

[0035] By adopting the above technical solution, the expansion tube 3 is firstly sleeved on the outside of the bolt 1 and inserted into the external hole wall together, and then the nut 2 is sleeved on the outside of the bolt 1 and the nut 2 is screwed. During this process, the bolt 1 can be slowly pulled outward. When the bolt 1 gradually moves outward, the fixed plate 41 fixed to the bolt 1 will push the push ring 42 inside the expansion tube 3. When the fixed plate 41 pushes the push ring 42, the push ring 42 will simultaneously push multiple support blocks 44 in the moving groove 43. The support blocks 44 in contact with the inclined surface of the push ring 42 gradually pass through the moving groove 43 and contact the inner wall of the external hole wall, and squeeze. The bolt 1 and the expansion tube 3 are locked inside the external hole wall, and when the nut 2 is rotated in the opposite direction, the fixed disk 41 gradually moves away from the push ring 42. At this time, after the push ring 42 loses the extrusion from the fixed disk 41, the support block 44 will also lose the extrusion from the push ring 42 and cannot be in close contact with the inside of the external hole wall. Since the expansion tube 3 and the bolt 1 inside it are locked on the inner wall of the external hole wall by the extrusion of the support block 44 on the inner wall of the external hole wall, and the expansion tube 3 itself is not deformed, the expansion tube 3 can continue to be used after being disassembled, which not only ensures the service life of the bolt 1 and the expansion tube 3, but also avoids unnecessary economic losses caused by damage to the expansion tube 3.

[0036] like Figure 3 As shown, a reset assembly 45 is provided inside the expansion tube 3. The reset assembly 45 includes a magnetic block 451 fixedly installed inside the push ring 42, and the number of the magnetic blocks 451 is multiple.

[0037] The positions of the multiple magnetic blocks 451 correspond to the positions of the multiple support blocks 44 respectively. The support blocks 44 are made of magnetic metal. The shape of the movable groove 43 is adapted to the shape of the support blocks 44. Slide grooves 452 are provided on both sides of the interior of the multiple movable grooves 43. The number of single-sided slide grooves 452 is multiple. Slide blocks 453 are fixedly connected to the two sides corresponding to the support blocks 44 and the movable grooves 43. The multiple slide blocks 453 are respectively slidably connected in the multiple slide grooves 452.

[0038] By adopting the above technical scheme, first, during the contact between the push ring 42 and the support block 44, the support block 44 and the push ring 42 are adsorbed by the magnetic block 451, and the surface of the push ring 42 is provided with an inclined surface, and contacts with the support block 44 through the inclined surface. When the push ring 42 and the support block 44 gradually move away from each other, the magnetic block 451 can still adsorb the support block 44, so that the multiple support blocks 44 inside the movable groove 43 are pulled at the same time and sink into the movable groove 43. At this time, the friction between the outer side of the support plate and the inner wall of the external hole wall is extremely small. When the nut 2 is rotated in the opposite direction to release the support of the push ring 42 on the support block 44, the magnetic block 451 inside the push ring 42 will also adsorb the support block 44, so that the support block 44 quickly enters the movable groove 43, effectively reducing the friction between the expansion tube 3 and the inner wall of the external hole wall, making it easier to disassemble and install the expansion tube 3 and the bolt 1.

[0039] like Figure 2 As shown, a pulling assembly 46 is provided inside and on the upper side of the expansion tube 3 , and the pulling assembly 46 includes a rotating disk 461 which is in sliding contact with the upper side of the expansion tube 3 .

[0040] A rotating ring 462 is fixedly connected to the lower side of the rotating disk 461 , and the rotating ring 462 is rotatably connected to the upper side of the expansion tube 3 .

[0041] A disassembly component 5 is provided on the upper side of the turntable 461 .

[0042] By adopting the above technical solution, first, after releasing the squeezing of the support block 44 on the inside of the external hole wall, the turntable 461 and the disassembly parts above it can be pulled. Since the turntable 461 is connected to the expansion tube 3 through the swivel 462, after pulling the turntable 461, the expansion tube 3 will gradually detach from the outside of the hole wall. Since it is not necessary to use other tools to pull and squeeze the expansion tube 3 when taking it out from the outside of the hole wall, it is effectively avoided that other tools cause deformation or wear of the expansion tube 3, so that the removal steps of the expansion tube 3 are simplified, and the expansion tube 3 can be reused.

[0043] like Figures 3 to 7 As shown, the disassembly component 5 includes a rotation groove 51 opened on the upper side of the rotating disk 461, and the number of the rotation grooves 51 is two.

[0044] The diameter of the outer rotating groove 51 is larger than the diameter of the inner rotating groove 51. A guide groove 52 is opened on the upper side of the turntable 461, and there are two guide grooves 52. The two rotating grooves 51 are connected through the guide groove 52. A guide block 53 is slidably connected in the inner rotating groove 51, and there are two guide blocks 53. The guide block 53 slides from the inner rotating groove 51 into the outer guide groove 52 through the guide groove 52. The upper sides of the two guide blocks 53 are fixedly connected with a fixing seat 54, the upper sides of the two fixing seats 54 are fixedly connected with a column 55, and the outer sides of the two columns 55 are slidably connected with a positioning ring 56. The lower sides of the two positioning rings 56 are respectively pressed and contacted with the upper sides of the two fixing seats 54, and the two positioning rings 56 are wrapped around the outer side of the same nut 2.

[0045] By adopting the above technical solution, first, when the nut 2 is screwed, the two fixing seats 54 can be rotated inside the outer rotating groove 51 through the slider 453. When the two sliders 453 correspond to the two guide grooves 52 respectively, the two fixing seats 54 can be squeezed, so that the slider 453 slides inside the guide groove 52 and gradually enters the inner rotating groove 51. After the two sliders 453 enter the inner rotating groove 51, the two positioning rings 56 sleeved on the outer side of the column 55 will dock and wrap around the outer side of the nut 2. Then, the two positioning rings 56 are squeezed and start to rotate. After the two positioning rings 56 rotate, they will drive the nut 2 to rotate. The nut 2 rotates on the outside of the bolt 1. After the height of the nut 2 changes, the heights of the two positioning rings 56 on the outside of the two columns 55 will also change. At the same time, the guide block 53 under the positioning seat will also rotate inside the inner rotating groove 51. Since the two positioning rings 56 will be wrapped around the outside of the nut 2 after docking, the nut 2 will also rotate on the outside of the bolt 1 while the two positioning rings 56 are twisted, so that the use of other tools can be reduced during the disassembly of the bolt 1 and the expansion tube 3, and the time for preparing tools before disassembly of the bolt 1 and the expansion tube 3 is reduced, thereby improving the disassembly speed of the bolt 1 and the expansion tube 3.

[0046] like Figure 7 and Figure 8 As shown, the gasket 6 is overlapped on the upper side of the turntable 461. A lubrication assembly 57 is provided above the turntable 461. The lubrication assembly 57 includes a storage cavity 571 opened inside the two positioning rings 56. The number of storage cavities 571 inside a single positioning ring 56 is two.

[0047] The four storage chambers 571 are slidably connected to the inside thereof with extrusion columns 572, which penetrate the lower side of the positioning ring 56. Liquid outlets 573 are provided on the inner surfaces of the two positioning rings 56. There are two liquid outlets 573 provided on the inner surface of a single positioning ring 56. The four storage chambers 571 are respectively connected to the four liquid outlets 573.

[0048] A rubber membrane 574 is fixedly installed inside the liquid outlet 573 , and a cross-shaped gap is formed through the surface of the rubber membrane 574 . The upper part of the extrusion column 572 is adapted to the shape of the storage cavity 571 .

[0049] By adopting the above technical scheme, first, before the bolt 1 is screwed through the two positioning rings 56, the two positioning rings 56 can be pressed downward so that the four squeezing columns 572 are squeezed at the same time, and the other end of the squeezing column 572 is inside the storage chamber 571 and is adapted to the internal shape of the storage chamber 571. After the squeezing column 572 is squeezed, the lubricating liquid above the squeezing column 572 gradually enters the liquid outlet 573. Since the rubber membrane 574 is an open film that is closed for a long time at the center, it will deform after being compressed and a gap will appear. In a normal state, the pressure of the liquid is not enough to deform it, and it is still in a closed state. The lubricating liquid passes through the rubber membrane 574 and then sprays out of the liquid outlet 573, and finally reaches the surface of the nut 2. Since the lubricating liquid can be sprayed above the nut 2 before the nut 2 is screwed through the positioning ring 56, and the lubricating liquid can reduce the gripping force and friction between the bolt 1 and the nut 2, the nut 2 can be screwed more easily on the outside of the bolt 1, further improving the disassembly speed of the bolt 1 and the expansion tube 3.

[0050] Working principle: First, put the expansion tube 3 on the outside of the bolt 1 and insert it into the external hole wall together, then screw the nut 2. During this process, the bolt 1 can be slowly pulled outward. When the bolt 1 gradually moves outward, the fixed plate 41 fixed to the bolt 1 will push the push ring 42 inside the expansion tube 3, so that the push ring 42 will simultaneously push multiple support blocks 44 in the moving groove 43, so that the support blocks 44 contact and squeeze the inner wall of the external hole wall. When the nut 2 is rotated in the opposite direction, The fixed plate 41 gradually moves away from the push ring 42. At this time, the support block 44 loses the pressure from the push ring 42, and the support block 44 and the push ring 42 are adsorbed by the magnetic block 451, so that the multiple support blocks 44 in the movable groove 43 are pulled at the same time. After the pressure of the support block 44 on the inside of the external hole wall is released, the rotating disk 461 and the disassembly parts above it can be pulled. Because the rotating disk 461 is connected to the expansion tube 3 through the rotating ring 462, after the rotating disk 461 is pulled, the expansion tube 3 will also gradually detach from the inside of the external hole wall.

[0051] When the nut 2 needs to be screwed, the two fixing seats 54 can be squeezed so that the two fixing seats 54 can pass through the guide groove 52 from the outer rotating groove 51 with the help of the slider 453 and gradually enter the inner rotating groove 51. At this time, the two positioning rings 56 on the outer side of the column 55 will be docked and wrapped around the outer side of the nut 2. Before the bolt 1 is screwed through the two positioning rings 56, the two positioning rings 56 can be pressed downward so that the four squeezing columns 572 are squeezed at the same time. After the squeezing columns 572 are squeezed, the lubricating liquid above the squeezing columns 572 gradually enters the liquid outlet 573, and the lubricating liquid passes through the rubber membrane 574 and then sprays out of the liquid outlet 573, and finally reaches the surface of the nut 2. Then, the two positioning rings 56 are screwed to drive the nut 2 to rotate, so that the nut 2 rotates on the outer side of the bolt 1. As the height of the nut 2 changes, the height of the two positioning rings 56 on the outer sides of the two columns 55 will also change, and the guide block 53 under the positioning seat will also rotate inside the inner rotating groove 51.

[0052] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detachable expansion bolt, comprising a bolt (1) and a nut (2) threadedly connected to the outer side of the bolt (1), an expansion tube (3) being sleeved on the outer side of the bolt (1), a gasket (6) being sleeved on the outer side of the bolt (1), and the nut (2) being pressed and contacted with the upper side of the gasket (6) after being rotated, characterized in that: A fastening component (4) is provided inside the expansion tube (3); The fastening component (4) includes a fixed plate (41) fixedly connected to the bottom end of the bolt (1); a push ring (42) is slidably connected to the inside of the expansion tube (3); a movable groove (43) is opened on the inner wall of the expansion tube (3); and the number of movable grooves (43) is multiple, and the multiple movable grooves (43) are arranged in a ring array; the insides of the multiple movable grooves (43) are slidably connected to support blocks (44); the sides of the multiple support blocks (44) close to the push ring (42) are in compression contact with the outer side of the push ring (42); the outer surface of the push ring (42) is provided with a bevel, and the number of bevels is multiple.

2. A detachable expansion bolt according to claim 1, characterized in that: A reset assembly (45) is provided inside the expansion tube (3), and the reset assembly (45) comprises a magnetic block (451) fixedly mounted inside the push ring (42), and the number of the magnetic blocks (451) is multiple.

3. A detachable expansion bolt according to claim 2, characterized in that: The positions of the multiple magnetic blocks (451) respectively correspond to the positions of the multiple support blocks (44); the support blocks (44) are made of magnetic metal; the shape of the movable grooves (43) is adapted to the shape of the support blocks (44); both sides of the inside of the multiple movable grooves (43) are provided with sliding grooves (452); the number of the sliding grooves (452) on a single side is multiple; both sides of the support blocks (44) corresponding to the movable grooves (43) are fixedly connected with sliding blocks (453); and the multiple sliding blocks (453) are respectively slidably connected in the multiple sliding grooves (452).

4. The detachable expansion bolt according to claim 1, characterized in that: A pulling assembly (46) is provided inside and on the upper side of the expansion tube (3), and the pulling assembly (46) comprises a rotating disk (461) which is in sliding contact with the upper side of the expansion tube (3).

5. A detachable expansion bolt according to claim 4, characterized in that: A rotating ring (462) is fixedly connected to the lower side of the rotating disk (461), and the rotating ring (462) is rotatably connected to the upper side of the expansion tube (3).

6. A detachable expansion bolt according to claim 5, characterized in that: A disassembly component (5) is provided on the upper side of the rotating disk (461), and the disassembly component (5) comprises a rotation groove (51) opened on the upper side of the rotating disk (461), and the number of the rotation grooves (51) is two.

7. The detachable expansion bolt according to claim 6, characterized in that: The diameter of the rotating groove (51) located on the outside is larger than the diameter of the rotating groove (51) located on the inside. A guide groove (52) is provided on the upper side of the rotating disk (461). The number of the guide grooves (52) is two. The two rotating grooves (51) are connected through the guide grooves (52). A guide block (53) is slidably connected in the rotating groove (51) located on the inside. The number of the guide blocks (53) is two. The guide block (53) is inserted from the rotating groove (51) on the inside through the guide groove (52). 51) slides into the outer guide groove (52), the upper sides of the two guide blocks (53) are fixedly connected with a fixing seat (54), the upper sides of the two fixing seats (54) are fixedly connected with a column (55), the outer sides of the two columns (55) are slidably connected with a positioning ring (56), the lower sides of the two positioning rings (56) are respectively pressed and contacted with the upper sides of the two fixing seats (54), and the two positioning rings (56) are wrapped around the outer side of the same nut (2).

8. The detachable expansion bolt according to claim 7, characterized in that: The gasket (6) is overlapped on the upper side of the turntable (461), and a lubrication assembly (57) is provided above the turntable (461). The lubrication assembly (57) includes a storage cavity (571) opened inside two positioning rings (56), and the number of storage cavities (571) inside a single positioning ring (56) is two.

9. The detachable expansion bolt according to claim 8, characterized in that: The four storage chambers (571) are slidably connected to the inside thereof with an extrusion column (572), the extrusion column (572) passing through the lower side of the positioning ring (56), the inner surfaces of the two positioning rings (56) are provided with a liquid outlet (573), the number of liquid outlets (573) provided on the inner surface of a single positioning ring (56) is two, and the four storage chambers (571) are respectively connected to the four liquid outlets (573).

10. The detachable expansion bolt according to claim 9, characterized in that: A rubber membrane (574) is fixedly installed inside the liquid outlet (573), and a "cross"-shaped gap is opened through the surface of the rubber membrane (574). The upper part of the extrusion column (572) is adapted to the shape of the storage cavity (571).

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