High-strength aluminum alloy structure for fasteners

Abstract

This invention belongs to the technical field of industrial equipment parts and discloses a high-strength aluminum alloy structure for fasteners, including a positioning bolt. The inner wall of the positioning bolt is provided with a limiting mechanism, and the outer wall of the positioning bolt is provided with a through groove and a reinforcing mechanism. The reinforcing mechanism includes a nut, the inner wall of which is provided with an internal thread. A rotating plate is rotatably connected to the inner wall of the nut, and an arc-shaped groove is provided on the outer wall of the rotating plate. A round rod is slidably connected to the inner wall of the arc-shaped groove, and a rubber clamp is fixedly connected to the outer wall of the round rod. By setting up the rotating plate and rubber clamp and other structures, this invention can improve the friction between the nut and the positioning bolt by screwing the nut onto the positioning bolt, causing three sets of rubber clamps to move synchronously towards the center and fit against the outer wall of the positioning bolt. This improves the fixing effect between the nut and the positioning bolt.

Description

Technical Field

[0001] This invention belongs to the technical field of industrial equipment parts, specifically high-strength aluminum alloy structures for fasteners. Background Technology

[0002] High-strength aluminum alloy fasteners are a type of structure used in fastener manufacturing. They use aluminum alloy as the main material, which has high strength and can withstand certain tensile, compressive, and shear forces. Through specific processing techniques, such as forging, extrusion, and machining, the aluminum alloy is shaped into fasteners. Its structural design comprehensively considers the requirements of connection reliability, stability, and lightweighting, and it is widely used in many fields such as aerospace, automotive, and machinery manufacturing.

[0003] Bolts and nuts are fasteners used in industrial equipment. They can contact and tighten objects from both sides. When used in mechanical equipment or vehicles, bolts and nuts are subjected to continuous vibration due to mechanical operation. Prolonged vibration can cause slight loosening between the bolts and nuts. This vibration can gradually reduce the friction between the threads and may even cause the bolts and nuts to come off. Some existing technologies do not have designs to strengthen the connection between bolts and nuts, requiring operators to conduct regular inspections after prolonged use. Nuts or bolts may also fall off, affecting the later use of the clamped object. The inspection process is also time-consuming and laborious. Therefore, a high-strength aluminum alloy structure for fasteners is proposed to address the above problems. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a high-strength aluminum alloy structure for fasteners, which solves the problem that existing technologies cannot improve the connection strength between bolts and nuts.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-strength aluminum alloy structure for fasteners, including a positioning bolt, wherein the inner wall of the positioning bolt is provided with a limiting mechanism, the outer wall of the positioning bolt is provided with a through groove, and the outer wall of the positioning bolt is provided with a reinforcing mechanism;

[0006] The reinforcement mechanism includes a nut with an internal thread on its inner wall, a rotating plate rotatably connected to the inner wall of the nut, an arc-shaped groove on the outer wall of the rotating plate, a round rod slidably connected to the inner wall of the arc-shaped groove, a rubber clamp fixedly connected to the outer wall of the round rod, a positioning groove on the inner wall of the nut, a fixing block fixedly connected to the outer wall of the rotating plate, a locking block elastically connected to the inner wall of the fixing block via a connecting spring, and a locking groove on the inner wall of the nut.

[0007] Preferably, the nut is threaded to the outer wall of the positioning bolt, and the round rod is in contact with the inner wall of the positioning groove.

[0008] Preferably, the rubber clamping block contacts the outer wall of the positioning bolt, and the locking block engages with the locking groove.

[0009] Preferably, one end of the connecting spring is fixedly connected to the outer wall of the locking block, and the other end of the connecting spring is fixedly connected to the inner wall of the fixing block.

[0010] Preferably, the fixing block penetrates the outer wall of the nut, and the locking block is slidably connected to the inner wall of the fixing block.

[0011] Preferably, the limiting mechanism includes a threaded rod, a slider is threadedly connected to the outer wall of the threaded rod, a sleeve is slidably connected to the inner wall of the positioning bolt, a groove is formed on the inner wall of the sleeve, a guide rod is fixedly connected to the outer wall of the slider, a connecting block A is fixedly connected to the outer wall of the slider, a connecting block B is hinged to the outer wall of the connecting block A through a connecting rod, two sets of inserts are slidably connected to the inner wall of the sleeve, and an annular groove is formed on the inner wall of the nut.

[0012] Preferably, the threaded rod is rotatably connected to the inner wall of the sleeve rod, and the guide rod is slidably connected to the inner wall of the groove.

[0013] Preferably, one end of the connecting rod is hinged to the outer wall of the connecting block B, and the other end of the connecting rod is hinged to the outer wall of the connecting block A.

[0014] Preferably, the insert block contacts the inner wall of the arc-shaped groove, and the insert block penetrates the inner wall of the through groove.

[0015] Preferably, the insert penetrates the outer wall of the sleeve rod, the sleeve rod penetrates the top outer wall of the positioning bolt, and the threaded rod penetrates the top outer wall of the sleeve rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention, through the combination of a rotating plate and rubber clamps, allows the rotating plate to be rotated by screwing the nut onto the positioning bolt and pressing the clamp. This causes the three sets of rubber clamps to move synchronously toward the center and fit against the outer wall of the positioning bolt, producing a certain deformation. This increases the friction between the nut and the positioning bolt, thereby improving the fixing effect between the nut and the positioning bolt.

[0018] This invention, through the cooperation of structures such as sleeve rods and insert blocks, allows the sleeve rod to be moved up and down to align the insert blocks with the annular groove after the nut and positioning bolt have tightened the object. Rotating the threaded rod causes the slider to move downwards, and the two sets of insert blocks move to the sides and contact the inner wall of the annular groove, thus further securing the nut and positioning bolt. This prevents the nut from falling off the positioning bolt due to collisions or shaking of the tightened object, thereby further improving the tightening effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the positioning bolts and reinforcement mechanism of the present invention;

[0021] Figure 3 This is a cross-sectional view of the nut and a schematic diagram of the rotating plate structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the nut of the present invention;

[0023] Figure 5 This is a cross-sectional view of the nut and a schematic diagram of the exploded rotating plate of the present invention.

[0024] Figure 6 This is a schematic diagram of the disassembled structure of the nut and rotating plate of the present invention;

[0025] Figure 7 This is a cross-section of the sleeve rod and an exploded structural diagram of the limiting mechanism of the present invention;

[0026] Figure 8 This is a cross-section of the sleeve rod and a schematic diagram of the disassembled threaded rod of the present invention.

[0027] In the diagram: 1. Positioning bolt; 2. Reinforcing mechanism; 201. Nut; 202. Internal thread; 203. Rotating plate; 204. Arc groove; 205. Round rod; 206. Rubber clamp; 207. Positioning groove; 208. Fixing block; 209. Connecting spring; 210. Locking block; 211. Locking groove; 3. Limiting mechanism; 301. Threaded rod; 302. Sleeve rod; 303. Groove; 304. Slider; 305. Guide rod; 306. Connecting block A; 307. Connecting rod; 308. Connecting block B; 309. Insert block; 4. Through groove; 5. Annular groove. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 8As shown, the present invention provides a high-strength aluminum alloy structure for fasteners, including a positioning bolt 1. The inner wall of the positioning bolt 1 is provided with a limiting mechanism 3, the outer wall of the positioning bolt 1 is provided with a through groove 4, and the outer wall of the positioning bolt 1 is provided with a reinforcing mechanism 2. The reinforcing mechanism 2 includes a nut 201, the inner wall of the nut 201 is provided with an internal thread 202, the inner wall of the nut 201 is rotatably connected to a rotating plate 203, the outer wall of the rotating plate 203 is provided with an arc-shaped groove 204, the inner wall of the arc-shaped groove 204 is slidably connected to a round rod 205, the outer wall of the round rod 205 is fixedly connected to a rubber clamp 206, the inner wall of the nut 201 is provided with a positioning groove 207, the outer wall of the rotating plate 203 is fixedly connected to a fixing block 208, the inner wall of the fixing block 208 is elastically connected to a locking block 210 through a connecting spring 209, and the inner wall of the nut 201 is provided with a locking groove 211.

[0030] The above solution involves the positioning bolt 1 and nut 201 together forming the main body of the aluminum alloy fastener. The positioning bolt 1 can be screwed through the threaded hole of the object to be fastened, and the nut 201 is screwed below the positioning bolt 1, ensuring that both are in contact with the outer wall of the object. The internal thread 202 and the external thread of the outer wall of the positioning bolt 1 can interlock, thus connecting and fixing the positioning bolt 1 and the nut 201, thereby fastening the object. Both of these are existing technologies familiar to operators. Through the reinforcement mechanism 2, after the nut 201 is screwed onto the positioning bolt 1, three sets of rubber clamps 206 are attached to the outer wall of the positioning bolt 1 to increase the friction on the positioning bolt 1, improving the fixing effect between the nut 201 and the positioning bolt 1. Combined with the setting of the limiting mechanism 3, the position of the nut 201 on the positioning bolt 1 can be fixed, preventing the nut 201 from falling off the outer wall of the positioning bolt 1 due to prolonged use or shaking of the fastened object, thereby further improving the fastening effect.

[0031] like Figures 3 to 6 As shown, nut 201 is threadedly connected to the outer wall of positioning bolt 1, and round rod 205 is in contact with the inner wall of positioning groove 207; rubber clamp 206 is in contact with the outer wall of positioning bolt 1, and locking block 210 is engaged with locking groove 211; one end of connecting spring 209 is fixedly connected to the outer wall of locking block 210, and the other end of connecting spring 209 is fixedly connected to the inner wall of fixing block 208; fixing block 208 penetrates the outer wall of nut 201, and locking block 210 is slidably connected to the inner wall of fixing block 208.

[0032] Using the above scheme: After the positioning bolt 1 passes through the threaded hole on the surface of the object to be fastened, the nut 201 can be screwed onto the positioning bolt 1. Before screwing, the positions of the three sets of rubber clamps 206 need to be adjusted into the inner wall of the nut 201 to avoid resistance during screwing; the slot 211 is provided with two sets, and the fixing block 208 penetrates through one side of the outer wall of the nut 201. By moving the fixing block 208, the rotating plate 203 can be rotated. When the rotating plate 203 rotates, the arc-shaped groove 204 exerts a squeezing force on the outer wall of the round rod 205, and because the round rod 205... Rod 205 contacts the inner wall of positioning groove 207. Guided by positioning groove 207, rod 205 moves along the inner wall of positioning groove 207 during the rotation of rotating plate 203. Thus, the three sets of rods 205 can drive the corresponding three sets of rubber clamps 206 to move simultaneously to the middle or the outside. When rotating plate 203 rotates to the point where the three sets of rods 205 move simultaneously to the inner wall of nut 201, nut 201 can be screwed onto positioning bolt 1. During the screwing process, rubber clamps 206 do not contact the outer wall of positioning bolt 1, that is, no resistance is generated.

[0033] When unaffected by external forces, the connecting spring 209, due to its own elasticity, keeps the locking block 210 in a popped-out state, engaging with one of the sets of slots 211. The locking block 210 has two sets of protrusions; one set is always engaged with the slot 211, while the other set is always on the outside. When the rotating plate 203 needs to be rotated, the outer set of protrusions can be pressed, causing the locking block 210 to move into the inner wall of the fixing block 208. The connecting spring 209 contracts under pressure, disengaging the inner protrusions from the slots 211, thus releasing the limiting relationship between the fixing block 208 and the rotating plate 203, allowing the rotating plate 203 to rotate. When the rotating plate 203 rotates until all three sets of rubber clamps 206 are on their outermost sides, the locking block 210 can be released. The connecting spring 209, due to its own elasticity, causes the locking block 210 to pop out, engaging with the other set of slots 211. This completes the limiting of the rotating plate 203, fixing its position and keeping the three sets of rubber clamps 206 in a fixed state. When the nut 201 is turned to make it fit against the object to be fastened, the locking block 210 can be pressed again and the fixing block 208 can be turned in the opposite direction to make the rotating plate 203 rotate in the opposite direction. At this time, the rotating plate 203 drives the round rod 205 and the corresponding rubber clamp 206 to move towards the center at the same time. When all three sets of rubber clamps 206 are in contact with the outer wall of the positioning bolt 1, the locking block 210 can be released to make it engage with the slot 211, completing the limiting of the rotating plate 203 and fixing the three sets of rubber clamps 206. Since the rubber clamps 206 are made of rubber, when they are in contact with and fixed against the outer wall of the positioning bolt 1, they will undergo a certain deformation, making them fit more tightly against the positioning bolt 1 and improving the fixing effect of the positioning bolt 1.

[0034] like Figure 7 and Figure 8As shown, the limiting mechanism 3 includes a threaded rod 301, a slider 304 threadedly connected to the outer wall of the threaded rod 301, a sleeve rod 302 slidably connected to the inner wall of the positioning bolt 1, a groove 303 formed on the inner wall of the sleeve rod 302, a guide rod 305 fixedly connected to the outer wall of the slider 304, a connecting block A306 fixedly connected to the outer wall of the slider 304, a connecting block B308 hinged to the outer wall of the connecting block A306 via a connecting rod 307, two sets of inserts 309 slidably connected to the inner wall of the sleeve rod 302, and an annular groove 5 formed on the inner wall of the nut 201.

[0035] Using the above scheme: the sleeve rod 302 can only move up and down within the inner wall of the positioning bolt 1, but cannot rotate, while the threaded rod 301 can only rotate within the inner wall of the sleeve rod 302, but cannot move up and down; the slider 304 slides on the inner wall of the groove 303 via the guide rod 305, and is guided by the groove 303, so that when the threaded rod 301 rotates, it can only drive the slider 304 and the guide rod 305 to move up and down along the inner wall of the groove 303, but will not rotate with the threaded rod 301; two sets of insert blocks 309 and connecting rods 307 are provided, symmetrically distributed on both sides of the threaded rod 301. The insert blocks 309 can only move laterally within the inner wall of the sleeve rod 302. When the slider 304 moves up and down, it will drive the connecting rod 307 to flip. When the connecting rod 307 flips, it will drive the two sets of insert blocks 309 to move. 9. Guided by the inner wall of the sleeve rod 302, the two sets of insert blocks 309 move simultaneously to the middle or both sides. When the sleeve rod 302 is pulled up and down, the two sets of insert blocks 309 will move synchronously in the inner wall of the through groove 4. After the nut 201 and the positioning bolt 1 have finished fastening the object, the insert blocks 309 can move to both sides and contact the inner wall of the annular groove 5, so that the nut 201 will not move up and down on the outer wall of the positioning bolt 1. When the object to be fastened shakes or other factors touch the nut 201, the nut 201 may rotate. However, since the nut 201 is threadedly connected to the positioning bolt 1, the nut 201 will definitely move up and down along the surface of the positioning bolt 1 when it rotates. But when the insert blocks 309 contact the annular groove 5, the nut 201 will not be able to move up and down. Thus, the nut 201 and the positioning bolt 1 can be fixed, further improving the connection and fastening effect.

[0036] like Figure 7 and Figure 8 As shown, the threaded rod 301 is rotatably connected to the inner wall of the sleeve rod 302, and the guide rod 305 is slidably connected to the inner wall of the groove 303; one end of the connecting rod 307 is hinged to the outer wall of the connecting block B308, and the other end of the connecting rod 307 is hinged to the outer wall of the connecting block A306; the insert block 309 contacts the inner wall of the arc groove 204, and the insert block 309 penetrates the inner wall of the through groove 4; the insert block 309 penetrates the outer wall of the sleeve rod 302, the sleeve rod 302 penetrates the top outer wall of the positioning bolt 1, and the threaded rod 301 penetrates the top outer wall of the sleeve rod 302.

[0037] Using the above method: When tightening the nut 201 onto the positioning bolt 1, the insert 309 needs to be retracted into the inner wall of the sleeve rod 302 first, so that it does not penetrate the through groove 4 and does not contact the outer wall of the nut 201; at this time, the threaded rod 301 can be rotated to drive the slider 304 to move upward, the two sets of connecting rods 307 flip, and drive the connecting block B308 and the insert 309 to move towards the middle at the same time, so that they can be retracted into the inner wall of the sleeve rod 302; when the nut 201 is threadedly connected to the positioning bolt 1 and is located on both sides of the object to be tightened, the position of the nut 201 on the positioning bolt 1 is also different due to the different thicknesses of the objects, but the annular groove 5 always corresponds to one place of the through groove 4. At this time, the sleeve rod 302 can be pulled up and down according to the position of the nut 201. By moving the sleeve rod 302 to move the insert block 309 to the position corresponding to the annular groove 5, the threaded rod 301 can be rotated in the opposite direction, causing the slider 304 to move downwards. This, along with the connecting rod 307, causes the connecting block B308 and the insert block 309 to move simultaneously to both sides. The insert block 309 passes through the through groove 4 and contacts the inner wall of the annular groove 5, thus completing the fixation. At this point, since the nut 201 is connected and fixed to the positioning bolt 1, and the positions of the sleeve rod 302 and the threaded rod 301 are also fixed, the adjustment can be completed without additional fixing of the two, achieving the fixing effect automatically. This further improves the fixing effect between the nut 201 and the positioning bolt 1, preventing the nut 201 from falling off the positioning bolt 1 due to collisions or other influences, thus improving the fastening effect.

[0038] Working principle and usage process of this invention:

[0039] The positioning bolt 1 can be screwed through the threaded hole of the object to be fastened, and the locking block 210 is pressed to retract the connecting spring 209. The locking block 210 moves to the inner wall of the fixing block 208 and disengages from one of the locking grooves 211, releasing the limitation on the fixing block 208 and the rotating plate 203. Then, the fixing block 208 is moved to drive the rotating plate 203 to rotate. The arc groove 204 presses the round rod 205. The round rod 205 moves under the guidance of the positioning groove 207, so that the three sets of round rods 205 drive the rubber clamp 206. Move it to the inner wall of nut 201 and release the locking block 210. Under the elastic force of connecting spring 209, it pops out and engages with another set of locking slots 211, so that the position of rotating plate 203 and rubber clamp 206 is fixed. For limiting mechanism 3, the threaded rod 301 needs to be rotated first to make slider 304 move upward. The movement of slider 304 drives connecting rod 307 to flip, so that the two sets of inserts 309 move towards the middle and are retracted into the inner wall of sleeve rod 302, so that they do not penetrate through slot 4 and do not contact the outer wall of nut 201.

[0040] Then screw the nut 201 onto the positioning bolt 1 from below, rotate the nut 201 so that the two come into contact with the outer wall of the object to be fastened, and achieve threaded connection by the engagement of the internal thread 202 of the nut 201 with the external thread of the positioning bolt 1, thus completing the fastening of the object.

[0041] Tighten the nut 201, with the rubber clamp 206 in the correct position, onto the positioning bolt 1. Once the nut 201 is in contact with the object to be fastened, press the locking block 210 again and reverse the movement of the fixing block 208, causing the rotating plate 203 to rotate in the opposite direction. This causes the round rod 205 and the rubber clamp 206 to move towards the center until the three sets of rubber clamps 206 are in contact with the outer wall of the positioning bolt 1. Then, release the locking block 210. Under the elastic force of the connecting spring 209, the locking block 210 pops out and engages with a set of slots 211, thus limiting the rotation plate 203 and fixing the rubber clamp 206. Since the rubber clamp 206 is made of rubber, it will deform when it is in contact with and fixed to the outer wall of the positioning bolt 1, thereby making it fit more tightly with the positioning bolt 1, increasing the friction on the positioning bolt 1, and strengthening the fixing effect between the nut 201 and the positioning bolt 1.

[0042] After the nut 201 is threadedly connected to the positioning bolt 1 and positioned on both sides of the object to be fastened, the sleeve rod 302 is pulled up and down according to the different positions of the nut 201 on the positioning bolt 1 due to the thickness of the object. This moves the insert block 309 to correspond to the position of the annular groove 5. Then, the threaded rod 301 is rotated in the opposite direction, and the slider 304 moves downward. Through the connecting rod 307, the insert block 309 moves to both sides. The insert block 309 passes through the through groove 4 and contacts the inner wall of the annular groove 5. At this time, even if the object to be fastened shakes or other factors cause the nut 201 to rotate, the nut 201 will have an up-and-down movement tendency due to the threaded connection between the nut 201 and the positioning bolt 1. The contact between the insert block 309 and the annular groove 5 restricts the up-and-down movement of the nut 201, thereby fixing the position of the nut 201 on the positioning bolt 1, further improving the connection and fastening effect, and preventing the nut 201 from falling off the positioning bolt 1 due to various external factors.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength aluminum alloy fastener, including a positioning bolt (1), characterized in that: The inner wall of the positioning bolt (1) is provided with a limiting mechanism (3), the outer wall of the positioning bolt (1) is provided with a through groove (4), and the outer wall of the positioning bolt (1) is provided with a reinforcing mechanism (2). The reinforcement mechanism (2) includes a nut (201), the inner wall of which is provided with an internal thread (202), a rotating plate (203) is rotatably connected to the inner wall of the nut (201), an arc groove (204) is provided on the outer wall of the rotating plate (203), a round rod (205) is slidably connected to the inner wall of the arc groove (204), a rubber clamp (206) is fixedly connected to the outer wall of the round rod (205), a positioning groove (207) is provided on the inner wall of the nut (201), and a fixing block (208) is fixedly connected to the outer wall of the rotating plate (203). The inner wall of the nut (201) is elastically connected to a locking block (210) by a connecting spring (209). The inner wall of the nut (201) is provided with a locking groove (211). The rubber clamp (206) contacts the outer wall of the positioning bolt (1). The locking block (210) is engaged with the locking groove (211). One end of the connecting spring (209) is fixedly connected to the outer wall of the locking block (210). The other end of the connecting spring (209) is fixedly connected to the inner wall of the fixing block (208). The fixing block (208) penetrates the outer wall of the nut (201). The locking block (210) is slidably connected to the inner wall of the fixing block (208). The limiting mechanism (3) includes a threaded rod (301), a slider (304) is threadedly connected to the outer wall of the threaded rod (301), a sleeve rod (302) is slidably connected to the inner wall of the positioning bolt (1), a groove (303) is provided on the inner wall of the sleeve rod (302), a guide rod (305) is fixedly connected to the outer wall of the slider (304), a connecting block A (306) is fixedly connected to the outer wall of the slider (304), and a connecting block B is hinged to the outer wall of the connecting block A (306) through a connecting rod (307). (308), the inner wall of the sleeve rod (302) is slidably connected with two sets of inserts (309), the inner wall of the nut (201) is provided with an annular groove (5), the threaded rod (301) is rotatably connected to the inner wall of the sleeve rod (302), the guide rod (305) is slidably connected to the inner wall of the groove (303), the insert (309) is in contact with the inner wall of the annular groove (5), the insert (309) penetrates the inner wall of the through groove (4), and the insert (309) is fixedly connected to the outer wall of the connecting block B (308).

2. The high-strength aluminum alloy structure for fasteners according to claim 1, characterized in that: The nut (201) is threaded to the outer wall of the positioning bolt (1), and the round rod (205) is in contact with the inner wall of the positioning groove (207).

3. The high-strength aluminum alloy structure for fasteners according to claim 1, characterized in that: One end of the connecting rod (307) is hinged to the outer wall of the connecting block B (308), and the other end of the connecting rod (307) is hinged to the outer wall of the connecting block A (306).

4. The high-strength aluminum alloy structure for fasteners according to claim 1, characterized in that: The insert (309) penetrates the outer wall of the sleeve (302), the sleeve (302) penetrates the top outer wall of the positioning bolt (1), and the threaded rod (301) penetrates the top outer wall of the sleeve (302).

Images