A gap-adjustable expansion bolt and manufacturing equipment thereof

Abstract

This invention discloses an adjustable-gap expansion bolt and its manufacturing equipment, relating to the field of expansion bolt technology. It addresses the problem that wear on the inner wall of the drilled hole causes a mismatch between the diameter of the drilled hole and the expansion bolt, hindering bolt installation and fixation. The invention includes a bolt body with a protrusion fixedly connected to its bottom. The invention uses a nut to compress and deform the expansion tube within the hole, achieving initial bolt fixing. Simultaneously, rotating the adjustment knob, via a slide rail, moves the threaded knob downwards on the bolt body, pushing the rubber expansion sleeve. This causes the rubber expansion sleeve to deform under external pressure, and the deformation, passing over the protrusion, homogenizes the rubber expansion sleeve, increasing the contact area and pressure between the rubber expansion sleeve and the inner wall of the hole. This increases the friction between the expansion bolt and the hole, achieving secondary expansion and fixing, thus improving the reliability and stability of the expansion bolt.

Description

Technical Field

[0001] The invention relates to the technical field of expansion bolts, and more particularly to an expansion bolt with adjustable gap and a manufacturing device thereof. Background Art

[0002] Adjustable gap expansion bolts are specially designed fasteners that allow the expansion of the bolt to be fine-tuned after installation to suit different fixing requirements and environmental conditions; such bolts are commonly used in the construction and engineering fields, especially on fixing surfaces such as concrete or brick walls, to fix various equipment and structures.

[0003] At present, when installing expansion bolts on concrete, it is necessary to use drilling equipment to drill holes on the wall or the ground, and then insert the expansion bolts. However, in actual drilling, the drill bit will wear the inner wall of the drill hole, resulting in the diameter of the drill hole and the expansion bolt being different. There is a large difference, which makes it inconvenient to insert and fix the expansion bolts. In view of this, we propose an expansion bolt with adjustable gap and its manufacturing equipment. Summary of the invention

[0004] The purpose of the present invention is to provide an expansion bolt with adjustable gap and its manufacturing equipment to solve the technical problem that the head will wear the inner wall of the drill hole, resulting in the diameter of the drill hole and the expansion bolt being different, making it inconvenient to insert and fix the expansion bolt.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an expansion bolt with adjustable gap and its manufacturing equipment, comprising a bolt body, a protrusion fixedly connected to the bottom of the bolt body; an expansion tube movably sleeved on the side surface of the bolt body and the protrusion movably sleeved inside the expansion tube, a plurality of notches are provided on the side surface of the expansion tube, a plurality of guide rods are fixedly connected to the top of the expansion tube and the guide rods are distributed in a circular array; a rubber expansion sleeve movably sleeved on the side surface of the bolt body and a plurality of guide rods movably sleeved inside the rubber expansion sleeve; an adjusting knob movably sleeved on one end of the bolt body close to the rubber expansion sleeve, a transmission knob slidably connected inside the adjusting knob, a threaded knob slidably connected inside the transmission knob and the threaded knob is movably connected to the bolt body through a first thread, and the threaded knob is movably connected to the bolt body. The adjusting button is in movable contact with the rubber expansion sleeve; the top of the adjusting button is in movable contact with a spring pad, and the spring pad is movably sleeved on the side surface of the bolt body; the top of the spring pad is in movable contact with a nut, and the nut and the bolt body are threadedly adapted. The present invention causes the expansion tube to be extruded and deformed in the hole through the nut, thereby realizing a preliminary bolt fixing effect. At the same time, the adjusting button can be rotated through the slide rail to limit the position, so that the threaded knob can move downward through the threaded rotation on the bolt body and push the rubber expansion sleeve, so that the rubber expansion sleeve is deformed by external extrusion, and the rubber expansion sleeve is uniformed during the deformation process after passing through the convex surface, thereby increasing the contact area and pressure between the rubber expansion sleeve and the inner wall of the hole, thereby increasing the friction between the expansion bolt and the hole, realizing secondary expansion fixation, and being beneficial to improving the reliability and stability of the expansion bolt.

[0006] Preferably, a curved surface is provided on one side of the guide rod, and a plurality of convex surfaces are provided on a side surface of the rubber expansion sleeve.

[0007] The present invention also provides an apparatus for manufacturing the above-mentioned expansion bolts with adjustable gaps, comprising a support base, wherein a manufacturing mechanism is arranged on one side of the top of the support base; the manufacturing mechanism comprises a threaded frame, a bending unit and a moving unit, wherein the bending unit is arranged on the side of the top of the support base away from the manufacturing mechanism, the support base and the bending unit are fixedly connected, and the moving unit and the manufacturing mechanism are movably connected; the threaded frame is arranged on the top of the support base, a cylinder is fixedly sleeved on the inner wall of the threaded frame, one side of the threaded frame is fixedly connected to a first fixed disk through a plurality of first plug rods, a transmission rod is fixedly connected to the output end of the cylinder and the transmission rod passes through the first fixed disk, and the transmission rod is away from one end of the cylinder A transmission plate is fixedly connected, and a plurality of movable grooves are respectively provided between the transmission plate and the first fixed plate, and the positions of every two movable grooves correspond to each other. The two opposite sides of the movable grooves are movably connected to a transmission plate through a first pin, and the two opposite ends of the transmission plates are movably connected to a support plate through a second pin. A first spring is fixedly connected to the bottom of each transmission plate, and the first spring and the transmission rod are fixedly connected. The present invention realizes an effective clamping function by pneumatically controlling mechanical parts to perform annular support on the inside of the expansion tube. At the same time, it can prevent the mechanical parts from clamping the outside of the expansion tube, resulting in the outside of the expansion tube being subjected to the force and deformed, which is beneficial to improving the protective effect of the device when in use.

[0008] Furthermore, the bending unit includes a support frame, which is fixedly connected to one side of the top of the support base, a first air pump is fixedly sleeved on the inner wall of the support frame, and a second fixed plate is fixedly connected to one side of the support frame close to the threaded frame through a plurality of second insertion rods.

[0009] Furthermore, a shaping rod is fixedly connected to a side of the second fixed plate away from the support frame, a frame is fixedly sleeved on a side surface of the shaping rod, and a rubber tube is fixedly sleeved on a side surface of the frame.

[0010] Furthermore, a shaping cavity is formed between the rubber tube and the shaping rod, and the shaping cavity is matched with the guide rod, and the rubber tube is fixedly connected to the first air pump through an air pipe.

[0011] Furthermore, a curved surface is provided on the side surface of the shaping rod, an insert block is fixedly connected to one end of the shaping rod away from the second fixed plate and the insert block is adapted to the expansion tube, and a plurality of folding surfaces are provided on the side surface of the rubber tube.

[0012] Furthermore, the moving unit comprises two slide grooves, and the slide grooves are symmetrically structured and opened on the top of the supporting base.

[0013] Furthermore, the inner walls on both sides of each of the slide grooves are movably connected with a first screw rod and the two first screw rods are threadedly adapted to the threaded frame. The bottom of the support base is symmetrically structured and fixedly connected to a first motor and the first screw rod is transmission-connected to the first motor. The present invention arranges a rubber tube to form a shaping cavity between the rubber tube and the shaping rod. When the guide rod is bent, the air inside the rubber tube can be pumped out by a first air pump to form a vacuum. Due to the different air pressures inside and outside, the folding surface moves toward the shaping rod and wraps the guide rod to move so that it is completely in contact with the curved surface to meet the bending requirements. The plug block is adapted to the expansion tube. When the guide rod is bent, the movement of the plug block inside the expansion tube can be used to detect whether the expansion tube is deformed, which is beneficial to improving the practicability of the manufacturing equipment.

[0014] Further, the method for manufacturing an expansion bolt with adjustable gap using the manufacturing device comprises the following steps:

[0015] S1. Preparation of expansion tube: firstly, a mold is manufactured according to the appearance of the expansion tube, then carbon steel is placed inside the mold, and the expansion tube is produced through an external shaping device;

[0016] S2, guide rod bending;

[0017] S2.1. Fixing of the expansion tube: first, the expansion tube is sleeved on the side surface of the transmission rod, and then the cylinder is operated through the external control mechanism, and the cylinder drives the transmission rod to move. When the transmission plate is close to the first fixed plate, the two opposite transmission plates move to one side under the action of the first spring, so that the support plate moves outward and fits against the inner wall of the expansion tube. When the cylinder continues to work, the expansion tube is fixed;

[0018] S2.2, guide rod bending process: after the expansion tube is fixed, the two first motors are first made to work synchronously through the external circuit mechanism, and the first motor drives the first screw to rotate. Since the first screw is threadedly adapted to the threaded frame, the threaded frame moves toward the support frame. When the guide rod contacts the rubber tube, the guide rod moves into the shaping cavity, and the insert moves into the expansion tube at the same time. By observing whether the insert encounters resistance or obstacles during the movement of the insert in the expansion tube, it can be judged whether the expansion tube is deformed due to the mechanical clamping structure. At the same time, the expansion tube and the insert are adapted to shape the guide rod. The steps provide a stable environment, and the rubber tube is fitted with one end of the shaping rod through a sealing ring and one end of the expansion tube, which can improve the sealing inside the shaping cavity. The first air pump is operated through an external control system, and the first air pump extracts the air inside the shaping cavity through an air pipe. In this process, the folded surface of the side surface of the rubber tube is squeezed toward the shaping rod due to air pressure, so that the guide rod is fitted on the curved surface due to the external force, thereby achieving the effect of bending the guide rod, and avoiding the contact of the guide rod with mechanical parts during the bending process, resulting in scratches or breakage on the surface of the guide rod.

[0019] S3. Assemble the expansion bolts: After the guide rod is bent, install the expansion tube, rubber expansion sleeve, adjustment button and other components in sequence on the side surface of the bolt body to complete the assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention uses a nut to cause the expansion tube to be squeezed and deformed in the hole, thereby achieving a preliminary bolt fixing effect. At the same time, the adjusting knob can be rotated through the slide rail to limit the position, so that the threaded knob can be moved downward by rotating the thread on the bolt body, and the rubber expansion sleeve can be pushed, so that the rubber expansion sleeve is deformed by external extrusion, and the rubber expansion sleeve is uniformed during the deformation process after passing through the convex surface, thereby increasing the contact area and pressure between the rubber expansion sleeve and the inner wall of the hole, thereby increasing the friction between the expansion bolt and the hole, achieving secondary expansion fixation, and being beneficial to improving the reliability and stability of the expansion bolt.

[0022] 2. The present invention realizes an effective clamping function by pneumatically controlling mechanical parts to provide annular support to the inside of the expansion tube. At the same time, it can prevent the mechanical parts from clamping the outside of the expansion tube, causing the outside of the expansion tube to be deformed due to the force applied, which is beneficial to improving the protective effect of the device when in use.

[0023] 3. The present invention provides a rubber tube to form a shaping cavity between the rubber tube and the shaping rod. When the guide rod is bent, the air inside the rubber tube can be pumped out by a first air pump to form a vacuum. Due to the difference in internal and external air pressure, the folding surface moves toward the shaping rod and wraps the guide rod to move so that it completely fits with the curved surface to meet the bending requirements. The insert block is compatible with the expansion tube. When the guide rod is bent, the movement of the insert block inside the expansion tube can be used to detect whether the expansion tube is deformed, which is beneficial to improving the practicality of the manufacturing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the expansion bolt of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the expansion bolt of the present invention;

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the expansion bolt manufacturing equipment of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional exploded structure of the expansion bolt manufacturing equipment of the present invention;

[0028] Figure 5 For the present invention Figure 4 A is an enlarged structural diagram;

[0029] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in FIG.

[0030] Explanation of reference numerals in the figure: 1. bolt body; 101. convex block; 2. expansion tube; 201. notch; 202. guide rod; 202a. curved surface; 3. rubber expansion sleeve; 3a. convex surface; 4. adjustment knob; 401. transmission knob; 402. threaded knob; 5. spring pad; 6. nut; 7. support base; 8. manufacturing mechanism; 801. threaded rack; 802. cylinder; 803. first fixed plate; 804. transmission rod; 805. transmission plate; 80 6. movable groove; 807. transmission plate; 808. support plate; 809. first spring; 9. bending unit; 901. support frame; 902. first air pump; 903. second fixed plate; 904. shaping rod; 904a. curved surface; 904b. plug-in block; 905. frame; 906. rubber tube; 906a. folding surface; 907. air pipe; 10. moving unit; 1001. slide groove; 1002. first screw rod; 1003. first motor. DETAILED DESCRIPTION

[0031] Embodiment 1, as Figures 1 to 6As shown, the present invention relates to an expansion bolt with adjustable gap and a manufacturing device thereof, comprising a bolt body 1, wherein a protrusion 101 is fixedly connected to the bottom of the bolt body 1; an expansion tube 2 is movably sleeved on the side surface of the bolt body 1 and the protrusion 101 is movably sleeved inside the expansion tube 2, a plurality of notches 201 are provided on the side surface of the expansion tube 2, a plurality of guide rods 202 are fixedly connected to the top of the expansion tube 2 and the guide rods 202 are distributed in a ring array, and it is worth noting that the guide rods 202 are curved and can guide the rubber expansion sleeve 3 in compression, so as to avoid the rubber expansion sleeve 3 from being compressed inward during compression, thereby reducing the friction between the rubber expansion sleeve 3 and the drill bit. The contact area of ​​the inner wall of the hole makes it difficult to achieve the function of adjustable gap of the expansion bolt; the side surface of the bolt body 1 is movably sleeved with a rubber expansion sleeve 3 and a plurality of guide rods 202 are movably sleeved inside the rubber expansion sleeve 3. It is worth noting that the rubber expansion sleeve 3 itself has the characteristic of elastic deformation. After the rubber expansion sleeve 3 is compressed, it is expanded to the surrounding, which can increase the contact area and pressure between the expansion bolt and the inner wall of the drilled hole, thereby achieving the function of adjustable gap; an adjusting button 4 is movably sleeved at one end of the bolt body 1 close to the rubber expansion sleeve 3, and a transmission knob 401 is slidably connected inside the adjusting button 4, and a threaded knob 402 is slidably connected inside the transmission knob 401, and the threaded knob 402 is movably connected to the bolt body 1 through a first thread. It is worth noting that the adjusting button 4, the transmission knob 401 and the threaded knob 402 are slidably connected through a slideway and a slide rail, so that the adjusting button 4 rotates, and the threaded knob 402 is limited and driven to rotate through the slideway, so that the threaded knob 402 pushes the rubber expansion sleeve 3 to move, thereby realizing the effective compression deformation function of the rubber expansion sleeve 3 and the effect of secondary expansion, and the threaded knob 402 is in movably contact with the rubber expansion sleeve 3; the top of the adjusting button 4 is movably in contact with a spring pad 5, and the spring pad 5 is movably sleeved on the side surface of the bolt body 1; the top of the spring pad 5 is movably in contact with a nut 6, and the nut 6 is in contact with The bolt bodies 1 are threadedly adapted. The present invention uses the nut 6 to squeeze and deform the expansion tube 2 in the hole to achieve a preliminary bolt fixing effect. At the same time, the adjusting knob 4 can be rotated through the slide rail limit to allow the threaded knob 402 to move downward through the threaded rotation on the bolt body 1 and push the rubber expansion sleeve 3, so that the rubber expansion sleeve 3 is squeezed and deformed by the outside. The rubber expansion sleeve 3 is evenly deformed through the convex surface 3a, thereby increasing the contact area and pressure between the rubber expansion sleeve 3 and the inner wall of the hole, thereby increasing the friction between the expansion bolt and the hole, achieving secondary expansion fixation, and being beneficial to improving the reliability and stability of the expansion bolt.

[0032] As another embodiment of the present invention, a curved surface 202a is provided on one side of the guide rod 202, and a plurality of convex surfaces 3a are provided on the side surface of the rubber expansion sleeve 3. It is worth noting that by providing the curved surface 202a, the rubber expansion sleeve 3 in compression can be guided to avoid the rubber expansion sleeve 3 from being compressed inwardly and affecting the secondary expansion function. At the same time, by providing the convex surface 3a, the rubber expansion sleeve 3 can be compressed in an orderly manner during compression of the rubber expansion sleeve 3, avoiding wrinkles of the rubber expansion sleeve 3 and affecting the elastic function of the rubber expansion sleeve 3 and the contact area with the inner wall of the hole.

[0033] Embodiment 2, as Figures 3 to 6 As shown, a gap-adjustable expansion bolt manufacturing equipment comprises a support base 7, and a manufacturing mechanism 8 is arranged on one side of the top of the support base 7; the manufacturing mechanism 8 comprises a threaded frame 801, a bending unit 9 and a moving unit 10, the bending unit 9 is arranged on the top of the support base 7 away from the manufacturing mechanism 8, the support base 7 and the bending unit 9 are fixedly connected, and the moving unit 10 and the manufacturing mechanism 8 are movably connected; the threaded frame 801 is arranged on the top of the support base 7, the inner wall of the threaded frame 801 is fixedly sleeved with a cylinder 802, one side of the threaded frame 801 is fixedly connected to a first fixed disk 803 through a plurality of first plug rods, the output end of the cylinder 802 is fixedly connected to a transmission rod 804 and the transmission rod 804 passes through the first fixed disk 803, and the transmission rod 804 is fixedly connected to the end away from the cylinder 802 A plurality of movable grooves 806 are respectively provided between the movable plate 805, the transmission plate 805 and the first fixed plate 803, and the positions of every two movable grooves 806 correspond to each other. The two movable grooves 806 are movably connected to the transmission plates 807 on opposite sides through the first latch, and the two transmission plates 807 are movably connected to the support plate 808 on opposite ends through the second latch. A first spring 809 is fixedly connected to the bottom of each transmission plate 807, and the first spring 809 is fixedly connected to the transmission rod 804. The present invention realizes an effective clamping function by pneumatically controlling the mechanical parts to provide annular support to the inside of the expansion tube 2. At the same time, it can prevent the mechanical parts from clamping the outside of the expansion tube 2, causing the outside of the expansion tube 2 to be deformed by the force applied thereto, which is beneficial to improving the protective effect of the device when in use.

[0034] As another embodiment of the present invention, the bending unit 9 includes a support frame 901, which is fixedly connected to one side of the top of the support base 7. The inner wall of the support frame 901 is fixedly sleeved with a first air pump 902. It is worth noting that the first air pump 902 is a conventional device in the prior art, which can extract the air in the shaping cavity to achieve a vacuum state. The support frame 901 is fixedly connected to a second fixed disk 903 on the side close to the threaded frame 801 through a plurality of second plug rods. The second fixed disk 903 is fixedly connected to a shaping rod 904 on the side away from the support frame 901. It is worth noting that a rubber pad is arranged at one end of the shaping rod 904, which can improve the sealing of the shaping cavity and avoid gas leakage, which affects the bending effect of the guide rod 202. The side surface of the shaping rod 904 is fixedly sleeved with a frame 905, and the side surface of the frame 905 is fixedly sleeved with a rubber tube 906. The rubber A shaping cavity is formed between the cylinder 906 and the shaping rod 904, and the shaping cavity is matched with the guide rod 202. The rubber cylinder 906 and the first air pump 902 are fixedly connected through the air pipe 907. The present invention sets the rubber cylinder 906 to form a shaping cavity between the rubber cylinder 906 and the shaping rod 904. When the guide rod 202 is bent, the air inside it can be extracted by the first air pump 902 to form a vacuum. Due to the different air pressures inside and outside, the folding surface 906a moves toward the shaping rod 904 and wraps the guide rod 202 to move so that it is completely in contact with the curved surface 904a to meet the bending requirements. The plug block 904b is matched with the expansion tube 2. When the guide rod 202 is bent, the movement of the plug block 904b inside the expansion tube 2 can be used to detect whether the expansion tube 2 is deformed, which is beneficial to improving the practicality of the manufacturing equipment.

[0035] As another embodiment of the present invention, a curved surface 904a is provided on the side surface of the shaping rod 904. It is worth noting that the curved surface on the curved surface 904a is adapted to the shape of the already bent guide rod 202, and when the guide rod 202 is bent, the bending efficiency of the guide rod 202 can be guaranteed. The shaping rod 904 is fixedly connected to an insert block 904b at one end away from the second fixed plate 903, and the insert block 904b is adapted to the expansion tube 2. A plurality of folding surfaces 906a are provided on the side surface of the rubber tube 906. It is worth noting that the insert block 904b is adapted to the inside of the expansion tube 2. In the process of bending the guide rod 202, the deformation detection of the clamped expansion tube 2 can also be performed, thereby realizing the functions of effective detection, bending and protection of the guide rod 202.

[0036] As another embodiment of the present invention, the mobile unit 10 includes two slide grooves 1001, which are symmetrically structured and opened on the top of the support base 7. The inner walls on both sides of each slide groove 1001 are movably connected with a first screw rod 1002, and the two first screw rods 1002 are threadedly adapted to the threaded frame 801. The bottom of the support base 7 is symmetrically structured and fixedly connected with a first motor 1003, and the first screw rod 1002 and the first motor 1003 are transmission-connected.

[0037] Embodiment 3: A manufacturing process of a gap-adjustable expansion bolt manufacturing device, comprising the following steps:

[0038] S1, preparing the expansion tube 2: firstly manufacturing a mold according to the appearance of the expansion tube 2, then putting carbon steel into the mold, and producing the expansion tube 2 through an external shaping device;

[0039] S2, the guide rod 202 is bent;

[0040] S2.1. Fixing of the expansion tube 2: first, the expansion tube 2 is sleeved on the side surface of the transmission rod 804, and then the cylinder 802 is operated through the external control mechanism, and the cylinder 802 drives the transmission rod 804 to move. When the transmission plate 805 is close to the first fixed plate 803, the two opposite transmission plates 807 move to one side under the action of the first spring 809, so that the support plate 808 moves outward and fits against the inner wall of the expansion tube 2. When the cylinder 802 continues to work, the expansion tube 2 is fixed;

[0041] S2.2, bending treatment of guide rod 202: after the expansion tube 2 is fixed, the two first motors 1003 are firstly made to work synchronously through the external circuit mechanism, and the first motor 1003 drives the first screw rod 1002 to rotate. Since the first screw rod 1002 is threadedly adapted to the threaded frame 801, the threaded frame 801 moves toward the support frame 901. When the guide rod 202 contacts the rubber tube 906, the guide rod 202 moves into the molding cavity, and the plug block 904b moves into the expansion tube 2. By observing whether the plug block 904b encounters resistance or obstacles during the movement inside the expansion tube 2, it can be judged whether the expansion tube 2 is deformed due to the mechanical clamping structure. At the same time, the expansion tube 2 is adapted to the plug block 904b, so as to determine whether the expansion tube 2 is deformed due to the mechanical clamping structure. The shaping step of the guide rod 202 provides a stable environment, and the rubber tube 906 is fitted with one end of the shaping rod 904 through a sealing ring and one end of the expansion tube 2, which can improve the sealing inside the shaping cavity. The first air pump 902 is operated through an external control system, and the first air pump 902 extracts the air inside the shaping cavity through the air pipe 907. In this process, the folded surface 906a on the side surface of the rubber tube 906 is squeezed toward the shaping rod 904 due to air pressure, so that the guide rod 202 is fitted on the curved surface 904a due to the external force, so as to achieve the effect of bending the guide rod 202, and avoid the guide rod 202 from contacting with mechanical parts during the bending process, resulting in scratches or breaks on the surface of the guide rod 202.

[0042] S3, assembling the expansion bolt: after the guide rod 202 is bent, the expansion tube 2, the rubber expansion sleeve 3, the adjusting button 4 and other components are sequentially installed on the side surface of the bolt body 1 to complete the assembly.

[0043] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An expansion bolt with adjustable gap, characterized in that: It comprises a bolt body (1), wherein a protrusion (101) is fixedly connected to the bottom of the bolt body (1); The lower end of the bolt body (1) is movably sleeved with an expansion tube (2), and the protrusion (101) is movably sleeved inside the expansion tube (2). A plurality of notches (201) are provided on the side surface of the expansion tube (2). A plurality of guide rods (202) are fixedly connected to the top of the expansion tube (2), and the plurality of guide rods (202) are distributed in a ring array. The upper end of the bolt body (1) is movably sleeved with a rubber expansion sleeve (3), and a plurality of guide rods (202) are movably sleeved inside the rubber expansion sleeve (3); An adjusting button (4) is movably sleeved at one end of the bolt body (1) close to the rubber expansion sleeve (3); a transmission knob (401) is slidably connected inside the adjusting button (4); a threaded knob (402) is slidably connected inside the transmission knob (401); the threaded knob (402) is movably connected to the bolt body (1) via a first thread; and the threaded knob (402) is in movably contact with the rubber expansion sleeve (3); The top of the adjusting button (4) is movably in contact with a spring washer (5), and the spring washer (5) is movably sleeved on the side surface of the bolt body (1); The top of the spring washer (5) is in movably contact with a nut (6), and the nut (6) and the bolt body (1) are thread-matched.

2. The gap-adjustable expansion bolt according to claim 1, characterized in that: A curved surface (202a) is provided on one side of the guide rod (202), and a plurality of convex surfaces (3a) are provided on the side surface of the rubber expansion sleeve (3).

3. A device for manufacturing the gap-adjustable expansion bolt according to claim 2, characterized in that: It comprises a support base (7), wherein a manufacturing mechanism (8) is provided on one side of the top of the support base (7); The manufacturing mechanism (8) comprises a threaded frame (801), a bending unit (9) and a moving unit (10); the bending unit (9) is arranged on a side of the top of the support base (7) away from the manufacturing mechanism (8); the support base (7) and the bending unit (9) are fixedly connected, and the moving unit (10) and the manufacturing mechanism (8) are movably connected; The threaded frame (801) is arranged on the top of the support base (7); the inner wall of the threaded frame (801) is fixedly sleeved with a cylinder (802); one side of the threaded frame (801) is fixedly connected to a first fixed plate (803) via a plurality of first insertion rods; the output end of the cylinder (802) is fixedly connected to a transmission rod (804), and the transmission rod (804) passes through the first fixed plate (803); the end of the transmission rod (804) away from the cylinder (802) is fixedly connected to a transmission plate (805); the transmission plate (805) ) and the first fixed plate (803), and a plurality of movable grooves (806) are respectively provided between the first fixed plate (803), and the positions of every two movable grooves (806) correspond to each other; the opposite sides of the two movable grooves (806) are movably connected to a transmission plate (807) via a first latch; the opposite ends of the two transmission plates (807) are movably connected to a support plate (808) via a second latch; the bottom of each transmission plate (807) is fixedly connected to a first spring (809), and the first spring (809) is fixedly connected to the transmission rod (804).

4. The device for manufacturing expansion bolts with adjustable gap according to claim 3, characterized in that: The bending unit (9) comprises a support frame (901), the support frame (901) being fixedly connected to one side of the top of the support base (7), a first air pump (902) being fixedly sleeved on the inner wall of the support frame (901), and a second fixed plate (903) being fixedly connected to one side of the support frame (901) close to the threaded frame (801) via a plurality of second insertion rods.

5. The device for manufacturing expansion bolts with adjustable gap according to claim 4, characterized in that: A shaping rod (904) is fixedly connected to the side of the second fixed plate (903) away from the support frame (901), a frame (905) is fixedly sleeved on the side surface of the shaping rod (904), and a rubber tube (906) is fixedly sleeved on the side surface of the frame (905).

6. The device for manufacturing expansion bolts with adjustable gap according to claim 5, characterized in that: A shaping cavity is formed between the rubber tube (906) and the shaping rod (904), and the shaping cavity is matched with the guide rod (202). The rubber tube (906) and the first air pump (902) are fixedly connected via an air pipe (907).

7. The device for manufacturing expansion bolts with adjustable gap according to claim 6, characterized in that: The side surface of the shaping rod (904) is provided with a curved surface (904a); an end of the shaping rod (904) away from the second fixed plate (903) is fixedly connected with an insert block (904b), and the insert block (904b) is adapted to the expansion tube (2); and the side surface of the rubber tube (906) is provided with a plurality of folding surfaces (906a).

8. The device for manufacturing expansion bolts with adjustable gap according to claim 7, characterized in that: The mobile unit (10) comprises two slide grooves (1001), and the slide grooves (1001) are symmetrically structured and are opened on the top of the support base (7).

9. The device for manufacturing expansion bolts with adjustable gap according to claim 8, characterized in that: The inner walls on both sides of each slide groove (1001) are movably connected to a first screw rod (1002), and the two first screw rods (1002) are threadedly adapted to the threaded frame (801). The bottom of the support base (7) is symmetrically structured and fixedly connected to a first motor (1003), and the first screw rods (1002) and the first motor (1003) are transmission-connected.

10. The device for manufacturing expansion bolts with adjustable gap according to claim 9, characterized in that: The method for manufacturing an expansion bolt with adjustable gap using the manufacturing device comprises the following steps: S1. Preparation of the expansion tube (2): firstly, manufacturing a mold according to the appearance of the expansion tube (2), then placing carbon steel into the mold, and producing the expansion tube (2) through an external shaping device; S2, the guide rod (202) is bent; S2.

1. Fixing treatment of the expansion tube (2): firstly, the expansion tube (2) is sleeved on the side surface of the transmission rod (804), and then the cylinder (802) is operated through the external control mechanism, and the cylinder (802) drives the transmission rod (804) to move, wherein, when the transmission plate (805) is close to the first fixed plate (803), the two opposite transmission plates (807) move to one side under the action of the first spring (809), so that the support plate (808) moves outward and fits against the inner wall of the expansion tube (2), and the expansion tube (2) is fixed while the cylinder (802) continues to work; S2.2, bending treatment of the guide rod (202): after the expansion tube (2) is fixed, the two first motors (1003) are firstly made to work synchronously through an external circuit mechanism, and the first motor (1003) drives the first screw rod (1002) to rotate. Since the first screw rod (1002) is threadedly adapted to the threaded frame (801), the threaded frame (801) moves toward the support frame (901). When the guide rod (202) contacts the rubber tube (906), the guide rod (202) moves into the molding cavity, and at the same time, the plug block (904b) moves into the expansion tube (2). By observing whether the plug block (904b) encounters resistance or obstacles during its movement inside the expansion tube (2), it can be judged whether the expansion tube (2) is deformed due to the mechanical clamping structure. At the same time, the expansion tube (2) and the plug block (904b) are adapted to each other. The rubber tube (906) and the shaping rod (904) are fitted together at one end through the sealing ring and the expansion tube (2), so that the sealing property inside the shaping cavity can be improved. The first air pump (902) is operated through the external control system, and the first air pump (902) extracts the air inside the shaping cavity through the air pipe (907). During this process, the folded surface (906a) on the side surface of the rubber tube (906) is pressed toward the shaping rod (904) due to the air pressure, so that the guide rod (202) is fitted on the curved surface (904a) due to the external force, so that the guide rod (202) is bent, and the guide rod (202) is prevented from contacting with mechanical parts during the bending process, resulting in scratches or breakage on the surface of the guide rod (202). S3, assembling the expansion bolt: after the guide rod (202) is bent, the expansion tube (2), the rubber expansion sleeve (3) and the adjustment button (4) are sequentially installed on the side surface of the bolt body (1) to complete the assembly.

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