Penetration damage prevention screw type expansion anchor bolt

Abstract

The utility model discloses an anti-penetration-damage screw type expansion anchor bolt which comprises a threaded penetrating piece, and one end of the threaded penetrating piece is in threaded connection with a threaded fastener in a sleeved mode. An expansion clamping piece structure slidably sleeves the outer portion of the threaded insertion piece, an expansion conical head sleeves the other end of the threaded insertion piece in a threaded mode, and the expansion clamping piece structure comprises an insertion sleeve which is slidably connected with the threaded insertion piece in a sleeving mode; and the multiple positioning tenons are installed in the penetrating sleeve in an annular array mode. The arrangement mode that the threaded penetrating piece is matched with the expansion clamping piece structure is utilized, the position of the expansion clamping piece structure is limited through the protruding limiting ring, the expansion clamping piece structure is fixed in a sliding sleeving mode instead of stamping wrapping, the performance stability of a product is improved, meanwhile, the anchor bolt is prevented from penetrating out and being damaged, and the service life of the anchor bolt is prolonged. The anchor bolt and concrete are fully anchored, and it is ensured that the expansion anchor bolt fully exerts the anchoring bearing capacity.

Description

Technical Field

[0001] The utility model relates to the field of expansion bolts, and particularly relates to a screw-type expansion bolt for preventing penetration and damage. Background Art

[0002] An expansion bolt is a mechanical device used to fix an object or structure. They are usually used on concrete or brick walls to provide firm support. An expansion bolt consists of a hollow metal tube with threads at one end and a closed end at the other. During installation, the expansion bolt is inserted into a pre-drilled hole and then tightened by rotating the bolt. When the bolt is tightened, the hollow tube wall expands, forming friction and resistance with the surrounding material, thus ensuring the stability of the fixation. Expansion bolts are widely used in the fastening of through-type objects. Compared with sleeve-type expansion bolts, screw-type expansion bolts have expansion clips and threads located at both ends of the screw respectively. During installation, the embedding depth can be freely adjusted to meet the requirements of different thicknesses of the fixed object, drilling depth, and tensile bearing capacity. The minimum embedding depth can reach the end of the thread.

[0003] There are four typical failure modes of expansion bolts under the action of pull-out load: the bolt steel is pulled and broken, the concrete cone is broken, the bolt is pulled out, and the bolt penetrates and breaks. The latter two failure modes are due to the incomplete fit between the expansion bolt and the concrete, and the anchoring bearing capacity of the expansion bolt cannot be fully exerted. According to existing research, there is no obvious difference in the tensile ultimate bearing capacity between bolt pull-out failure and penetration failure. When the friction between the inner side of the expansion clip and the screw is small and the friction between the outer side and the concrete is large, bolt penetration failure is likely to occur. However, in actual engineering applications, this failure mode of poor cooperation between the expansion clip and the screw should be avoided. Content of the Utility Model

[0004] The purpose of the utility model is to provide a screw-type expansion bolt for preventing penetration and damage, so as to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A screw-type expansion bolt for preventing penetration and damage, comprising:

[0006] A threaded insert, one end of which is threadedly sleeved with a threaded fastener;

[0007] An expansion clip structure is slidably sleeved outside the threaded insert. The other end of the threaded insert is threadedly sleeved with an expansion cone head. The expansion clip structure includes:

[0008] An insertion sleeve, which is slidably sleeved with the threaded insert;

[0009] Positioning tenons, a plurality of which are annularly and arrayedly installed inside the insertion sleeve, and the positioning tenons are slidably inserted and connected with the threaded insert.

[0010] Preferably, the threaded insertion member includes:

[0011] A first threaded post, the threaded fastener is sleeved outside the first threaded post;

[0012] A first connecting post, the first connecting post is connected to one end of the first threaded post;

[0013] A raised limiting ring, the raised limiting ring is connected to the end of the first connecting post, and the raised limiting ring is used for limiting the expansion clip structure.

[0014] Preferably, the threaded insertion member further includes:

[0015] A second connecting post, one end of the second connecting post is connected to the raised limiting ring, and the diameter of the raised limiting ring is greater than the diameter of the second connecting post;

[0016] A second threaded post, the second threaded post is connected to the other end of the second connecting post, the second threaded post is threadedly sleeved with the expansion cone head, and the first threaded post, the first connecting post, the raised limiting ring, the second connecting post and the second threaded post are integrally arranged.

[0017] Preferably, the threaded fastener includes:

[0018] A hexagonal nut, the hexagonal nut is threadedly sleeved outside the first threaded post;

[0019] A washer, the washer is slidably inserted through the first threaded post, and the washer is arranged at the bottom of the hexagonal nut.

[0020] Preferably, the expansion clip structure further includes:

[0021] A first auxiliary deformation groove, a plurality of the first auxiliary deformation grooves are arranged in a circular array on the top of the insertion sleeve, and the first auxiliary deformation grooves are arranged staggered with the positioning tenons;

[0022] A second auxiliary deformation groove, a plurality of the second auxiliary deformation grooves are arranged in a circular array on the bottom of the insertion sleeve.

[0023] Preferably, the expansion clip structure further includes:

[0024] Flanges, a plurality of the flanges are installed in a circular array at the bottom of the insertion sleeve, and the flanges are arranged staggered with the second auxiliary deformation grooves.

[0025] Preferably, the cross-section of the positioning tenon is triangular, a plurality of limiting insertion grooves are arranged in a circular array on the outer wall of the second connecting post, and the positioning tenon and the inner cavity of the limiting insertion grooves are inserted and matched with each other.

[0026] Technical effects and advantages of the present utility model:

[0027] The present utility model utilizes a setting method in which a threaded insertion member is matched with an expansion clip structure. The position of the expansion clip structure is limited by a raised limiting ring to prevent the expansion clip structure from being inserted excessively relative to the threaded insertion member, making it more flexible to use. The expansion clip structure is fixed by a sliding sleeve-in method instead of stamping and wrapping. While improving the stability of the product's own performance, it avoids the occurrence of the anchor bolt piercing and breaking, enables the anchor bolt to be fully anchored with the concrete, and ensures that the expansion anchor bolt fully exerts its anchoring bearing capacity. Brief description of the drawings

[0028] Figure 1 It is a front structural schematic diagram of the present utility model.

[0029] Figure 2 It is a front structural schematic diagram at the threaded insertion member of the present utility model.

[0030] Figure 3 It is an internal structural schematic diagram at the expansion cone head of the present utility model.

[0031] Figure 4 It is a three-dimensional structural schematic diagram at the expansion clip structure of the present utility model.

[0032] In the figure: 1. Threaded insertion member; 11. First threaded column; 12. First connecting column; 13. Raised limiting ring; 14. Second connecting column; 141. Limiting insertion groove; 15. Second threaded column; 2. Threaded fastener; 21. Hexagonal nut; 22. Washer; 3. Expansion clip structure; 31. Insertion sleeve; 32. First auxiliary deformation groove; 33. Second auxiliary deformation groove; 34. Positioning tenon; 35. Flange; 4. Expansion cone head. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] The present utility model provides as Figures 1-4A kind of anti-piercing and damage-proof screw expansion anchor bolt shown in the figure includes: a threaded insertion part 1, and a threaded fastener 2 is threadedly sleeved at one end of the threaded insertion part 1; an expansion clip structure 3 is slidably sleeved outside the threaded insertion part 1, and an expansion cone head 4 is threadedly sleeved at the other end of the threaded insertion part 1. The position of the expansion clip structure 3 is limited by a raised limit ring 13 to prevent the expansion clip structure 3 from being inserted excessively relative to the threaded insertion part 1, making it more flexible to use. The expansion clip structure 3 is fixed by a sliding sleeve-in method instead of stamping and wrapping. While improving the stability of the product's own performance, it avoids the piercing and damage of the anchor bolt, enables the anchor bolt to be fully anchored with the concrete, ensures that the expansion anchor bolt fully exerts its anchoring bearing capacity. Through the setting of the internal threaded groove in the expansion cone head 4, the expansion cone head 4 can be threadedly matched with the second threaded column 15, so as to fix the position of the sleeved expansion clip structure 3, restrict the expansion clip structure 3 on the threaded insertion part 1, and avoid the piercing and damage of the anchor bolt under the action of the pulling load.

[0035] The expansion clip structure 3 includes: an insertion sleeve 31, and the insertion sleeve 31 is slidably sleeved with the threaded insertion part 1; positioning tenons 34, a plurality of positioning tenons 34 are installed in the insertion sleeve 31 in a circular array, and the positioning tenons 34 are slidably inserted and connected with the threaded insertion part 1. The expansion clip structure 3 also includes: first auxiliary deformation grooves 32, a plurality of first auxiliary deformation grooves 32 are opened in the top of the insertion sleeve 31 in a circular array, and the first auxiliary deformation grooves 32 are arranged staggeredly with the positioning tenons 34; second auxiliary deformation grooves 33, a plurality of second auxiliary deformation grooves 33 are opened in the bottom of the insertion sleeve 31 in a circular array. The expansion clip structure 3 also includes: flanges 35, a plurality of flanges 35 are installed in the bottom of the insertion sleeve 31 in a circular array, and the flanges 35 are arranged staggeredly with the second auxiliary deformation grooves 33. The cross section of the positioning tenon 34 is triangular. A plurality of limit insertion grooves 141 are opened in the outer wall of the second connecting column 14 in a circular array, and the positioning tenon 34 is inserted and matched with the inner cavity of the limit insertion groove 141. Both the first auxiliary deformation groove 32 and the second auxiliary deformation groove 33 are U-shaped. Through the first auxiliary deformation groove 32 and the second auxiliary deformation groove 33 respectively opened at both ends of the insertion sleeve 31, deformation space is provided for the expansion deformation at both ends of the insertion sleeve 31, so as to facilitate the expansion and opening of the insertion sleeve 31. Through the protruding setting of the flanges 35 relative to the insertion sleeve 31, the insertion sleeve 31 is fully anchored with the concrete after expansion. The positioning tenons 34 on the insertion sleeve 31 are stuck inside the inner cavity of the limit insertion groove 141 of the second connecting column 14. Through the limit insertion groove 141, it is convenient to limit the position of the positioning tenon 34 and prevent the second connecting column 14 from rotating randomly during the installation process of the insertion sleeve 31, making the cooperation between the insertion sleeve 31 and the second connecting column 14 more stable.

[0036] Furthermore, the threaded insertion member 1 includes: a first threaded post 11, with a threaded fastener 2 sleeved outside the first threaded post 11; a first connecting post 12, where the first connecting post 12 is connected to one end of the first threaded post 11, and a knocking head is provided at the other end of the first threaded post 11 screwed into the hexagon nut 21. The raised casting ring uses a cold forging process, making the material have good ductility. Even if the drilling is not perpendicular to the concrete surface, a certain degree of installation adjustment can be carried out, and the knocking head prevents damage to the thread when the anchor bolt is knocked into the pre-drilled hole; a raised limiting ring 13, where the raised limiting ring 13 is connected to the end of the first connecting post 12, and the raised limiting ring 13 is used for limiting the expansion clip structure 3. The threaded insertion member 1 further includes: a second connecting post 14, with one end of the second connecting post 14 connected to the raised limiting ring 13, and the diameter of the raised limiting ring 13 is greater than that of the second connecting post 14; a second threaded post 15, where the second threaded post 15 is connected to the other end of the second connecting post 14, and the second threaded post 15 is threadedly sleeved with the expansion cone head 4. Moreover, the first threaded post 11, the first connecting post 12, the raised limiting ring 13, the second connecting post 14, and the second threaded post 15 are integrally arranged. The diameter of the raised limiting ring 13 is greater than the inner diameter of the expansion clip structure 3, thus facilitating the limitation of the socketing between the expansion clip structure 3 and the threaded insertion member 1, and preventing the expansion clip structure 3 from moving outward along the threaded insertion member 1. Through the first threaded post 11, it is convenient to carry out threaded cooperation with the threaded fastener 2 for anchoring and fixing the workpiece. Through the second connecting post 14, it is convenient to carry out socketing cooperation with the expansion clip structure 3. Through the second threaded post 15, it is convenient to carry out threaded tightening cooperation with the expansion cone head 4.

[0037] Furthermore, the threaded fastener 2 includes: a hexagon nut 21, with the hexagon nut 21 threadedly sleeved outside the first threaded post 11; a washer 22, where the washer 22 slidably penetrates through the first threaded post 11, and the washer 22 is arranged at the bottom of the hexagon nut 21. By screwing the hexagon nut 21 and the washer 22 onto the first threaded post 11 of the threaded insertion member 1, through the threaded cooperation between the hexagon nut 21 and the first threaded post 11, it is convenient to tightly fix the workpiece. Through the washer 22, it is convenient to increase the contact area of the threaded pressing of the hexagon nut 21, so as to increase the stability of the pressing.

[0038] Finally, it should be noted that: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A screw - type expansion anchor bolt for preventing penetration and damage, comprising: A threaded insertion member (1), one end of the threaded insertion member (1) is threadedly sleeved with a threaded fastener (2); It is characterized in that: an expansion clip structure (3) is slidably sleeved outside the threaded insertion member (1), the other end of the threaded insertion member (1) is threadedly sleeved with an expansion cone head (4), and the expansion clip structure (3) includes: An insertion sleeve (31), the insertion sleeve (31) is slidably sleeved with the threaded insertion member (1); Positioning tenons (34), a plurality of the positioning tenons (34) are annularly and arrayedly installed inside the insertion sleeve (31), and the positioning tenons (34) are slidably inserted and connected with the threaded insertion member (1).

2. The anti-piercing and anti-destruction screw-type expansion anchor bolt according to claim 1, characterized in that, The threaded insertion member (1) includes: A first threaded column (11), the threaded fastener (2) is sleeved outside the first threaded column (11); A first connecting column (12), the first connecting column (12) is connected to one end of the first threaded column (11); A raised limiting ring (13), the raised limiting ring (13) is connected to the end of the first connecting column (12), and the raised limiting ring (13) is used for limiting the expansion clip structure (3).

3. The anti-piercing and anti-destruction screw expansion anchor bolt according to claim 2, characterized in that, The threaded insertion member (1) further includes: A second connecting column (14), one end of the second connecting column (14) is connected to the raised limiting ring (13), and the diameter of the raised limiting ring (13) is greater than the diameter of the second connecting column (14); A second threaded column (15), the second threaded column (15) is connected to the other end of the second connecting column (14), the second threaded column (15) is threadedly sleeved with the expansion cone head (4), and the first threaded column (11), the first connecting column (12), the raised limiting ring (13), the second connecting column (14) and the second threaded column (15) are integrally arranged.

4. The anti-piercing and damage-proof screw-type expansion anchor bolt according to claim 1, characterized in that, The threaded fastener (2) includes: A hexagonal nut (21), the hexagonal nut (21) is threadedly sleeved outside the first threaded column (11); A washer (22), the washer (22) is slidably inserted with the first threaded column (11), and the washer (22) is arranged at the bottom of the hexagonal nut (21).

5. The anti-piercing and damage-proof screw expansion anchor bolt according to claim 3, characterized in that, The expansion clip structure (3) further includes: First auxiliary deformation grooves (32), a plurality of the first auxiliary deformation grooves (32) are annularly and arrayedly opened at the top of the insertion sleeve (31), and the first auxiliary deformation grooves (32) are arranged staggeredly with the positioning tenons (34); Second auxiliary deformation grooves (33), a plurality of the second auxiliary deformation grooves (33) are annularly and arrayedly opened at the bottom of the insertion sleeve (31).

6. The anti-piercing and anti-destruction screw expansion anchor bolt according to claim 4, characterized in that, The expansion clip structure (3) further includes: Flanges (35), a plurality of the flanges (35) are annularly and arrayedly installed at the bottom of the insertion sleeve (31), and the flanges (35) are arranged staggeredly with the second auxiliary deformation grooves (33).

7. The anti-piercing and damage-proof screw-type expansion anchor bolt according to claim 5, characterized in that, The cross - section of the positioning tenon (34) is triangular, a plurality of limiting insertion grooves (141) are annularly and arrayedly opened on the outer wall of the second connecting column (14), and the positioning tenon (34) and the inner cavity of the limiting insertion groove (141) are inserted and matched with each other.

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