A reinforced expansion bolt of a local double-layer bending structure

Abstract

The utility model discloses a kind of reinforced expansion bolts of local double-layer bending structure, it is related to fastener field, including expansion assembly and locking assembly assembled in the inside of the expansion assembly, the expansion assembly includes expansion cylinder, the bottom of the expansion cylinder is equipped with expansion leaf, the bottom of the expansion leaf is bent inwardly with bending wall;The locking assembly includes expansion block slidingly installed between the bending wall, threaded rod is installed in the inside of the expansion block and penetrates, the top of the threaded rod extends out of the expansion cylinder, the top of the threaded rod is screw-mounted with hexagon nut, gasket is padded between the hexagon nut and the expansion cylinder;This kind of reinforced expansion bolts of local double-layer bending structure, the bottom position of expansion leaf is bent inwardly to form bending wall by bending process, make expansion leaf form double-layer overlapping structure, can improve the thickness of expansion leaf port, strengthen structural strength, avoid the situation that deformation or slip due to uneven stress.

Description

Technical Field

[0001] This utility model relates to fastener technology, specifically to an enhanced expansion bolt with a partially double-layer bending structure. Background Technology

[0002] Expansion bolts, as an important anchoring element, are widely used in construction, machinery, transportation, energy and other fields. They are mainly used to fix pipe supports or equipment to base materials such as walls, floors, and columns. Anchoring is achieved by generating friction or mechanical locking through expansion. Traditional expansion bolts consist of a screw, expansion tube, nut and washer. The nut is rotated to apply axial pressure to the expansion tube, causing it to expand outward along the opening of the tube wall, forming a frictional anchoring force with the hole wall. The expansion bolt fits tightly with the hole wall of the base material through the threaded connector. It is suitable for fixing heavy objects in hard materials such as concrete and stone.

[0003] However, the expansion tubes in traditional expansion bolts are mostly single-layer structures. Since they are fixed to the hole wall by compression expansion during expansion, the single-layer expansion tubes are relatively thin and have relatively weak structural strength. When subjected to compression, they are prone to deformation or slippage in the base material due to uneven stress. Utility Model Content

[0004] The purpose of this invention is to provide an enhanced expansion bolt with a partially double-layer bending structure to solve the problems of traditional single-layer expansion tubes in the prior art, which are thin, have relatively weak structural strength, and are prone to deformation or slippage in the substrate due to uneven stress when subjected to compression.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a reinforced expansion bolt with a partially double-layer bending structure, comprising an expansion component and a locking component assembled inside the expansion component, wherein the expansion component includes an expansion cylinder, the bottom of the expansion cylinder is provided with an expansion leaf, and the bottom of the expansion leaf is bent inward with a bending wall;

[0006] The locking assembly includes an expansion block slidably mounted between the bent walls, a threaded rod being installed through the interior of the expansion block, the top of the threaded rod extending out of the expansion cylinder, a hexagonal nut being threaded onto the top of the threaded rod, and a washer being placed between the hexagonal nut and the expansion cylinder.

[0007] Furthermore, the expansion leaf is formed by bending the bending wall through a bending groove, and the surface of the expansion leaf is equipped with anti-slip toothed strips.

[0008] Furthermore, an installation groove is provided on the periphery of the expansion cylinder, and a reinforcing ring is embedded in the interior of the installation groove.

[0009] Furthermore, a sliding strip is fixedly installed on the periphery of the expansion block, and a sliding groove is formed on the surface of the bent wall for the sliding strip to slide.

[0010] Furthermore, a limiting block is fixedly installed at the bottom of the threaded rod, a through hole is provided inside the expansion block for the threaded rod to pass through, and a limiting groove is provided at the bottom of the expansion block for insertion with the limiting block.

[0011] Furthermore, the hexagonal nut and the threaded rod are engaged by a threaded hole, and the bottom of the washer is covered with anti-slip particles.

[0012] Furthermore, a locking post is inserted into the periphery of the hexagonal nut through a socket, and a locking hole is provided on the surface of the washer for the locking post to be inserted.

[0013] Compared with the prior art, the present invention provides an enhanced expansion bolt with a partial double-layer bending structure. By setting an expansion component, the bottom position of the expansion blade can be bent inward to form a bent wall, which can fit against the inner wall of the expansion blade. This allows the expansion blade to form a double-layer overlapping structure, which can effectively increase the thickness of the expansion blade end, strengthen the structural strength, withstand greater extrusion pressure, and ensure uniform distribution of extrusion pressure. This effectively avoids deformation or slippage in the substrate due to uneven stress.

[0014] By setting anti-slip teeth on the periphery of the expansion blade, the expansion effect of the expansion blade can cause the anti-slip teeth to embed into the hole wall of the substrate when it is squeezed against the hole wall of the substrate. This can effectively improve the anchoring effect, making it less likely for the expansion blade to slide or rotate within the hole wall. This enhances stability, allowing it to withstand heavier objects without falling off, and effectively improves the performance.

[0015] By setting a reinforcing ring around the expansion cylinder, the mounting groove can be used to limit the reinforcing ring, allowing it to wrap around the expansion cylinder. When the expansion blades expand outward, the reinforcing ring can reinforce and lock the expansion cylinder, preventing tearing at the bend between the expansion blades and the expansion cylinder. This effectively ensures the integrity of the expansion cylinder, prevents loosening caused by tearing, and effectively improves tensile strength. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0018] Figure 2 This is an exploded structural diagram provided for an embodiment of the present utility model;

[0019] Figure 3 A schematic diagram of the expansion component structure provided in an embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional view of the expansion cylinder and expansion blades provided in an embodiment of the present utility model;

[0021] Figure 5 A schematic diagram of the locking component structure provided in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Expansion assembly; 11. Expansion cylinder; 12. Reinforcing ring; 13. Expansion blade; 14. Anti-slip rack; 15. Sliding groove; 16. Mounting groove; 17. Bending groove; 18. Bending wall; 2. Locking assembly; 21. Hex nut; 22. Insertion hole; 23. Locking post; 24. Threaded hole; 25. Washer; 26. Locking hole; 27. Expansion block; 28. Sliding strip; 29. ​​Threaded rod; 210. Limiting block; 211. Anti-slip particles; 212. Limiting groove; 213. Through hole. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] As attached Figure 1 To be continued Figure 5 As shown:

[0026] Example 1:

[0027] This utility model provides an enhanced expansion bolt with a partial double-layer bending structure, including an expansion component 1 and a locking component 2 assembled inside the expansion component 1. The expansion component 1 includes an expansion cylinder 11, and the bottom of the expansion cylinder 11 is provided with an expansion blade 13. The bottom of the expansion blade 13 is bent inward with a bending wall 18.

[0028] The locking assembly 2 includes an expansion block 27 that is slidably installed between the bending walls 18. A threaded rod 29 is installed through the interior of the expansion block 27. An expansion cylinder 11 extends from the top of the threaded rod 29. A hexagonal nut 21 is threaded onto the top of the threaded rod 29. A washer 25 is placed between the hexagonal nut 21 and the expansion cylinder 11.

[0029] As can be seen from the above, during use, the threaded rod 29 is passed through the bottom of the expansion block 27 and inserted into the expansion cylinder 11 from bottom to top, so that the top of the expansion block 27 can be inserted between the expansion blades 13, and the top of the threaded rod 29 extends out of the expansion cylinder 11. The expansion cylinder 11 is installed by inserting it into the hole wall of the substrate. The washer 25 is passed through the threaded rod 29 and is fitted to the top of the expansion cylinder 11. The hexagonal nut 21 is screwed on the top position of the threaded rod 29 using a wrench or other tools. By rotating the hexagonal nut 21, the threaded rod 29 can be moved upward, so that the threaded rod 29 can pass through the hexagonal nut 21.

[0030] By continuously driving the threaded rod 29 upward, the threaded rod 29 can drive the expansion block 27 to move upward synchronously. The expansion block 27 has a conical structure, which can compress the bent wall 18 when it moves upward, allowing the expansion leaf 13 to expand outward and compress and fix the hole wall. The bent wall 18 formed by bending inward through the bending process can fit against the inner wall of the expansion leaf 13, allowing the expansion leaf 13 to form a double-layer overlapping structure. This can effectively increase the thickness of the expansion leaf 13 port, strengthen the structural strength, and withstand greater compressive force when compressed. At the same time, it can make the compressive force distribution uniform, effectively avoiding the situation where deformation or slippage is easily caused by uneven force in the substrate.

[0031] From the appendix Figure 3 and attached Figure 4 It can be seen that the expansion blade 13 and the bending wall 18 are bent together by bending groove 17, and the surface of the expansion blade 13 is equipped with anti-slip toothed strips 14.

[0032] As can be seen from the above, the bending groove 17 can release stress during the bending process of the bending wall 18, allowing the bending wall 18 to be bent smoothly and fit against the inner wall of the expansion blade 13. This makes it less likely for the connection between the bending wall 18 and the expansion blade 13 to break. When the expansion effect of the expansion blade 13 is pressed against the hole wall of the substrate, the anti-slip toothed strip 14 can be embedded in the hole wall of the substrate, which can effectively improve the anchoring effect and prevent the expansion blade 13 from sliding or rotating within the hole wall. This strengthens the stability, allows it to withstand heavier objects without falling off, and effectively improves the performance.

[0033] For details, please refer to the appendix. Figure 3 and attached Figure 4 As shown, an installation groove 16 is provided on the periphery of the expansion cylinder 11, and a reinforcing ring 12 is embedded in the interior of the installation groove 16.

[0034] As can be seen from the above, the reinforcing ring 12 can be limited by the mounting groove 16, making it less likely to fall off. The reinforcing ring 12 wraps around the expansion cylinder 11, providing protection for the expansion cylinder 11. When the expansion blade 13 expands outward, the reinforcing ring 12 can reinforce and lock the expansion cylinder 11, preventing tearing at the bend between the expansion blade 13 and the expansion cylinder 11. This effectively ensures the integrity of the expansion cylinder 11, prevents it from tearing and loosening, and effectively improves its tensile strength.

[0035] For details, please refer to the appendix. Figure 2 and attached Figure 3 As shown, a sliding strip 28 is fixedly installed on the periphery of the expansion block 27, and a sliding groove 15 is provided on the surface of the bent wall 18 for the sliding strip 28 to slide.

[0036] As can be seen from the above, when the expansion block 27 expands the expansion leaf 13, the sliding strip 28 can slide along the sliding groove 15. The sliding groove 15 limits the sliding strip 28, making it difficult for the expansion block 27 and the bending wall 18 to rotate, thus stably expanding the expansion leaf 13.

[0037] Working principle: The threaded rod 29 passes through the bottom of the expansion block 27 and is inserted into the expansion cylinder 11 from bottom to top, so that the top of the threaded rod 29 extends out of the expansion cylinder 11. The washer 25 passes through the threaded rod 29 and fits against the top of the expansion cylinder 11. Using a wrench or other tools, the hexagonal nut 21 is screwed into the top position of the threaded rod 29, which can drive the threaded rod 29 to move upward, so that the expansion block 27 can squeeze the bent wall 18. The conical part of the expansion block 27 can push the expansion leaf 13 outward, so that the expansion leaf 13 can be squeezed into the hole wall for anchoring. The double-layer overlapping effect of the expansion leaf 13 through the bent wall 18 can improve the structural strength, enhance the tensile effect, and make the expansion cylinder 11 less likely to loosen in the hole wall.

[0038] Example 2:

[0039] Reference Appendix Figure 5 As shown, a limiting block 210 is fixedly installed at the bottom of the threaded rod 29, and a through hole 213 is provided inside the expansion block 27 for the threaded rod 29 to pass through. A limiting groove 212 is provided at the bottom of the expansion block 27 to be inserted into the limiting block 210.

[0040] As can be seen from the above, the threaded rod 29 can pass through the expansion block 27 from bottom to top through the through hole 213, and the limiting block 210 can be inserted into the limiting groove 212. Since both the limiting groove 212 and the limiting block 210 are square structures, the limiting groove 212 can limit the limiting block 210, so that when the hexagonal nut 21 tightens the threaded rod 29, the threaded rod 29 is less likely to rotate and slip.

[0041] Reference Appendix Figure 2 and attached Figure 5 As shown, the hexagonal nut 21 and the threaded rod 29 are engaged by threads through the threaded hole 24, and the bottom of the washer 25 is covered with anti-slip particles 211.

[0042] As can be seen from the above, the threaded hole 24 facilitates the threaded engagement between the hexagonal nut 21 and the threaded rod 29. When the hexagonal nut 21 is rotated by tools such as a wrench, the threaded rod 29 can be moved upward. The anti-slip particles 211 can increase the friction between the washer 25 and the expansion cylinder 11, making it difficult for the washer 25 to rotate when the hexagonal nut 21 is locked.

[0043] Reference Appendix Figure 2 As shown, a locking pin 23 is inserted into the periphery of the hexagonal nut 21 through the insertion hole 22, and a locking hole 26 is provided on the surface of the washer 25 for the locking pin 23 to be inserted.

[0044] As can be seen from the above, during the process of locking the hexagonal nut 21 and the threaded rod 29, the locking pin 23 can be inserted into the insertion hole 22, so that the locking pin 23 can be inserted into the locking hole 26, thereby locking the hexagonal nut 21 and the washer 25, preventing the hexagonal nut 21 and the washer 25 from rotating, and making it less likely for the hexagonal nut 21 to loosen.

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reinforced expansion bolt with a partially double-layer bending structure, comprising an expansion assembly (1) and a locking assembly (2) assembled inside the expansion assembly (1), characterized in that, The expansion assembly (1) includes an expansion cylinder (11), the bottom of which is provided with an expansion blade (13), and the bottom of the expansion blade (13) is bent inward with a bent wall (18). The locking assembly (2) includes an expansion block (27) slidably mounted between the bent walls (18), a threaded rod (29) is installed through the interior of the expansion block (27), the top of the threaded rod (29) extends out of the expansion cylinder (11), a hexagonal nut (21) is threaded onto the top of the threaded rod (29), and a washer (25) is placed between the hexagonal nut (21) and the expansion cylinder (11).

2. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, The expansion blade (13) is formed by bending the bending wall (18) through a bending groove (17), and the surface of the expansion blade (13) is equipped with an anti-slip toothed strip (14).

3. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, The expansion cylinder (11) has an installation groove (16) on its periphery, and a reinforcing ring (12) is inlaid inside the installation groove (16).

4. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, A sliding strip (28) is fixedly installed on the periphery of the expansion block (27), and a sliding groove (15) is provided on the surface of the bent wall (18) for the sliding strip (28) to slide.

5. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, A limiting block (210) is fixedly installed at the bottom of the threaded rod (29), and a through hole (213) is provided inside the expansion block (27) for the threaded rod (29) to pass through. A limiting groove (212) is provided at the bottom of the expansion block (27) to be inserted into the limiting block (210).

6. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, The hexagonal nut (21) and the threaded rod (29) are threadedly engaged through the threaded hole (24), and the bottom of the washer (25) is covered with anti-slip particles (211).

7. The reinforced expansion bolt with a partially double-layer bending structure according to claim 1, characterized in that, The hexagonal nut (21) is connected to a locking post (23) through a socket (22) on its periphery, and the surface of the washer (25) is provided with a locking hole (26) for the locking post (23) to be inserted.

Images