High-bearing shear-resistant self-tapping screw for support

Abstract

The utility model relates to the technical field of self-tapping screws, and provides a high-bearing shear-resistant self-tapping screw for a support, which comprises a screw main body, and the top end of the screw main body is fixedly connected with a screw head; according to the anti-loosening screw, the anti-loosening rod can be wrapped and protected through the protection ring, so that when the whole screw is transported or packaged, the anti-loosening rod cannot damage a packaging bag, when the screw body rotates to fix the support, the protection ring is fixed through the fixing block, the screw head drives the protection ring to rotate, and when the protection ring makes contact with the support, the screw body continues to rotate; the screw head pushes the rotating ring to extrude the protection ring based on pressure, the protection ring slides into the shrinkage groove under the pressure, finally, the anti-loosening rod penetrates through the protection ring to make contact with the support, then the anti-loosening rod penetrates into the support along with rotation of the screw head, and when the protection ring completely enters the shrinkage groove, the screw body is completely fixed. And the anti-loosening rod limits the screw main body, so that the screw main body is prevented from being loosened due to vibration and overturning of the bracket.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self -tapping screw technical field especially, it relates to a high bearing anti -shear self -tapping screw for support. BACKGROUND

[0002] The high bearing anti -shear self -tapping screw for support is a fastener that can provide stable connection in support structure and bear high bearing force and shear force, and is widely used in various support structures that need to bear high shear force and bearing force, such as bridge support, building support, mechanical equipment support, etc. They can ensure the stability and safety of the support structure, prevent safety accidents caused by loosening or falling off.

[0003] For example, the utility model discloses a support using self-tapping screw with high bearing capacity and shear resistance, the self-tapping screw includes a head and a shank, wherein the percentage of the thread diameter on the shank to the length of the self-tapping screw is 26.2%-29.25%. The self-tapping screw of the utility model is reasonably designed in terms of diameter and length. On the one hand, the self-tapping screw of the utility model is relatively short in length, so that its penetration direction is not easy to tilt or deviate when penetrating the support, thereby avoiding the influence on the load capacity of the overall support and preventing the self-tapping bit from being exposed to cause scratches and other accidents, thereby improving the safety and aesthetics of the combined support. On the other hand, the diameter of the self-tapping screw is much larger than that of existing self-tapping screws, thereby having high bearing capacity and shear resistance.

[0004] In the above-mentioned prior art, the diameter of the self-tapping screw is set to be relatively large, and the length is set to be relatively short, thereby improving the bearing capacity and shear resistance. However, even if an anti-slip groove is provided at the position of the screw head after the self-tapping screw is installed and fixed, the continuous vibration and sudden impact during long-term use can cause the self-tapping screw to loosen, thereby causing the support to become unstable. SUMMARY

[0005] The utility model aims at solving the problem that the self-tapping screw in the prior art loosens after being installed and fixed, even if an anti-slip groove is provided at the position of the screw head, the continuous vibration and sudden impact during long-term use can cause the self-tapping screw to loosen, thereby causing the support to become unstable.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a high bearing shearing self -tapping screw for support, including screw body, the top of screw body is fixedly connected with screw head, the outside of screw head bottom is equipped with the shrinkage groove that establishes, the inside of shrinkage groove bottom is equipped with the rotation groove that establishes, the inside rotation groove is close to the side annular array of shrinkage groove and is equipped with first sliding slot, first sliding slot is communicated with shrinkage groove, the both sides of first sliding slot are equipped with limit slot, limit slot does not penetrate shrinkage groove, the screw body is located at shrinkage groove and rotation groove and is equipped with anti -loosening subassembly.

[0007] As a preferred implementation, the inner wall of the inside top of the shrinkage groove is slidingly connected with a positioning rod, the positioning rod is slidingly connected with the first sliding slot, the two sides of the positioning rod are fixedly connected with a limiting sliding block, the limiting sliding block is slidingly connected with the limiting slot, the top of the protective ring is deformed by extrusion with the inside top of the shrinkage groove, and the extrusion force generated by the deformation pushes the top of the positioning rod to extrude the rotating ring, and finally the positioning rod pierces the rotating ring into the hollow groove, thereby fixing the rotating ring. Therefore, when the screw body is shaken, the rotating ring and the screw head are fixed, and the screw head is prevented from turning loose.

[0008] As a preferred implementation, the anti-loosening subassembly includes a protective piece and an anti-loosening piece, the protective piece includes a protective ring, the protective ring is slidingly connected inside the shrinkage groove, the height of the protective ring is greater than the depth of the shrinkage groove, the outer wall of the protective ring is annularly arrayed and fixedly connected with a fixed block, when the protective ring contacts the support, the screw body continues to rotate, the screw head pushes the rotating ring to extrude the protective ring based on pressure, the protective ring is broken between the fixed block, and the protective ring slides into the shrinkage groove under pressure, and finally the anti-loosening rod penetrates the protective ring and contacts the support.

[0009] As a preferred implementation, the top of the fixed block is fixedly connected with the bottom of the screw head, the bottom of the protective ring is provided with an anti-skid groove, and the middle of the top of the protective ring is provided with a protective groove. By setting the protective ring, the anti-loosening rod can be wrapped and protected, so that the anti-loosening rod does not damage the packaging bag during the transportation or packaging of the entire screw.

[0010] As a preferred implementation, the anti-loosening piece includes a rotating ring, the rotating ring is rotatably connected inside the rotation groove, the outer wall of the top of the rotating ring is connected with the positioning rod, the rotating ring is aligned with the protective groove, the protective ring is fixed by the fixed block, so that the screw head drives the protective ring to rotate, when the protective ring contacts the support, the screw body continues to rotate, the screw head pushes the rotating ring to extrude the protective ring based on pressure, and the protective ring slides into the shrinkage groove under pressure, and finally the anti-loosening rod penetrates the protective ring and contacts the support.

[0011] As a preferred implementation, the bottom of the rotating ring is annularly arrayed and fixedly connected with an anti-loosening rod, and the anti-loosening rod pierces into the support as the screw head rotates.

[0012] As a preferred embodiment, the anti-loose rod is located inside the protection groove, and a hollow groove is formed in the top end of the swivel ring.

[0013] As a preferred embodiment, the outer wall of the screw body is fixedly connected with a thread, and a cross groove is formed in the top end of the screw head.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. In the utility model, the anti-loose rod is wrapped and protected by the protection ring, so that the anti-loose rod cannot damage the packaging bag during the transportation or packaging of the screw.

[0016] 2. In the utility model, after the protection ring enters the inside of the contraction groove, the positioning rod is gradually extruded, and the positioning rod moves to the inside of the rotation groove under pressure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model provides a kind of high bearing shear self-tapping screw structure schematic diagram for support;

[0018] Figure 2 The utility model provides a kind of positioning rod structure schematic diagram for support high bearing shear self-tapping screw of the utility model;

[0019] Figure 3 The utility model provides a kind of anti-loose assembly explosion structure schematic diagram for support high bearing shear self-tapping screw;

[0020] Figure 4 The utility model provides a high bearing anti -shear self -tapping screw for support Figure 3 The enlarged structural schematic diagram in A of the utility model is shown in the figure.

[0021] Figure 5 The utility model provides a high bearing anti -shear self -tapping screw for support positioning rod structural schematic diagram is shown in the figure.

[0022] Figure 6 The utility model provides a high bearing anti -shear self -tapping screw for support anti -looseness piece structural schematic diagram is shown in the figure.

[0023] Legend:

[0024] 1, screw main part; 11, thread; 12, screw head; 13, cross groove; 14, contraction groove; 141, positioning rod; 142, limit sliding block; 15, rotation groove; 151, first sliding groove; 152, limit groove; 21, protection ring; 211, fixed block; 212, antiskid groove; 213, protection groove; 22, swivel ring; 221, anti -looseness rod; 222, hollow groove. Specific implementation

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0026] Please refer to Figure 1 - Figure 6 The utility model provides a technical scheme: a high bearing anti -shear self -tapping screw for support, including screw main part 1, the top of screw main part 1 is fixedly connected with screw head 12, and the outside of the bottom of screw head 12 is provided with contraction groove 14, and the inside of the bottom of screw head 12 is provided with rotation groove 15 at contraction groove 14, and the inside top of rotation groove 15 is provided with first sliding groove 151 near the side annular array of contraction groove 14, and first sliding groove 151 is communicated with contraction groove 14, and the both sides of first sliding groove 151 are provided with limit groove 152, and limit groove 152 does not penetrate through contraction groove 14, and screw main part 1 is provided with anti -looseness assembly at contraction groove 14 and rotation groove 15.

[0027] As Figure 1 - Figure 6As shown, the inner wall of the top end of the contraction groove 14 is slidingly connected with a positioning rod 141, the positioning rod 141 is slidingly connected with a first sliding groove 151, the two sides of the positioning rod 141 are fixedly connected with a limiting sliding block 142, the limiting sliding block 142 is slidingly connected with a limiting groove 152, the anti-loosening assembly comprises a protective piece and an anti-loosening piece, the protective piece comprises a protective ring 21, the protective ring 21 is slidingly connected in the inside of the contraction groove 14, the height of the protective ring 21 is greater than the depth of the contraction groove 14, the outer wall of the protective ring 21 is fixedly connected with a fixed block 211 in an annular array, the top end of the fixed block 211 is fixedly connected with the bottom end of the screw head 12, the bottom end of the protective ring 21 is provided with an anti-skid groove 212, and the middle part of the top end of the protective ring 21 is provided with a protective groove 213.

[0028] In the embodiment, the protective ring 21 can wrap the anti-loosening rod 221, so that the anti-loosening rod 221 cannot damage the packaging bag during the whole screw transportation or packaging, when the screw body 1 rotates to fix the support, the protective ring 21 is fixed through the fixed block 211, so that the screw head 12 drives the protective ring 21 to rotate, when the protective ring 21 contacts the support, the screw body 1 continues to rotate, the screw head 12 gives the pressure-based pushing swivel ring 22 to extrude the protective ring 21, the protective ring 21 is broken between the fixed block 211, and the protective ring 21 slides into the contraction groove 14 under pressure, finally the anti-loosening rod 221 penetrates the protective ring 21 and contacts the support, and then the anti-loosening rod 221 is inserted into the support with the rotation of the screw head 12, when the protective ring 21 completely enters the contraction groove 14, the screw body 1 is completely fixed, and the anti-loosening rod 221 limits the screw body 1, avoiding the screw body 1 from being loosened due to vibration of the support.

[0029] As shown in the figure, Figure 1 - Figure 6 As shown, the anti-loosening piece comprises a swivel ring 22, the swivel ring 22 is rotationally connected in the inside of the rotation groove 15, the outer wall of the top end of the swivel ring 22 is clamped with the positioning rod 141, the swivel ring 22 is opposite to the protective groove 213, the bottom end of the swivel ring 22 is fixedly connected with an anti-loosening rod 221 in an annular array, the anti-loosening rod 221 is located in the inside of the protective groove 213, the inside of the top end of the swivel ring 22 is provided with a hollow groove 222, the outer wall of the screw body 1 is fixedly connected with a thread 11, and the top end of the screw head 12 is provided with a cross groove 13.

[0030] In the embodiment, after the protective ring 21 enters the inside of the shrinkage groove 14, the positioning rod 141 is gradually pressed, and the positioning rod 141 is moved to the inside of the rotating groove 15 under the pressure. Since the height of the protective ring 21 is greater than the depth of the shrinkage groove 14, after the top end of the protective ring 21 enters the inside of the shrinkage groove 14, the top end of the protective ring 21 is deformed by being pressed against the top end of the inside of the shrinkage groove 14, and the pressing force generated by the deformation pushes the positioning rod 141 to press against the top end of the rotating ring 22. Since the hollow groove 222 is arranged, the top end of the rotating ring 22 is thin, so that the positioning rod 141 can easily pierce the rotating ring 22 to enter the hollow groove 222, thereby fixing the rotating ring 22. Therefore, when the screw body 1 is shaken, the rotating ring 22 is fixed with the screw head 12, and the screw head 12 is prevented from being loosened and turned over.

[0031] Working principle: first, by setting the protective ring 21 can be wrapped in the anti-loose rod 221 protection, so that the whole screw transport or packaging, anti-loose rod 221 will not be damaged to the packaging bag, when the screw body 1 rotating fixed on the support, the protective ring 21 is fixed by the fixed block 211, so that the screw head 12 drives the protective ring 21 to rotate, when the protective ring 21 and the support contact, the screw body 1 continues to rotate, the screw head 12 gives the pressure based on the rotating ring 22 to push the protective ring 21, the protective ring 21 and the fixed block 211 between the fracture, and the protective ring 21 is pressed into the shrinkage groove 14, finally the anti-loose rod 221 breaks through the protective ring 21 and the support contact, and then the screw head 12 rotates, so that the anti-loose rod 221 pierces into the support, when the protective ring 21 completely enters the shrinkage groove 14, the screw body 1 is completely fixed, and the anti-loose rod 221 limits the screw body 1, avoiding the screw body 1 from being shaken by the support to turn over and cause loosening. After the protective ring 21 enters the inside of the shrinkage groove 14, the positioning rod 141 is gradually pressed, and the positioning rod 141 is moved to the inside of the rotating groove 15 under the pressure. Since the height of the protective ring 21 is greater than the depth of the shrinkage groove 14, after the top end of the protective ring 21 enters the inside of the shrinkage groove 14, the top end of the protective ring 21 is deformed by being pressed against the top end of the inside of the shrinkage groove 14, and the pressing force generated by the deformation pushes the positioning rod 141 to press against the top end of the rotating ring 22. Finally, the positioning rod 141 pierces the rotating ring 22 to enter the hollow groove 222, thereby fixing the rotating ring 22. Therefore, when the screw body 1 is shaken, the rotating ring 22 is fixed with the screw head 12, and the screw head 12 is prevented from being loosened and turned over.

[0032] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to apply to other fields with equivalent changes. However, any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the present application still fall within the protection scope of the present application.

Claims

1. A high load shear self-drilling screw for use in scaffolding comprising a screw body (1) characterised in that: The top end of the screw body (1) is fixedly connected with a screw head (12), an outside of a bottom end of the screw head (12) is provided with a contraction groove (14), an inside of the bottom end of the screw head (12) located in the contraction groove (14) is provided with a rotating groove (15), a first sliding groove (151) is annularly arranged on one side of the rotating groove (15) close to the contraction groove (14), the first sliding groove (151) is communicated with the contraction groove (14), limit grooves (152) are arranged on both sides of the first sliding groove (151), the limit grooves (152) do not penetrate through the contraction groove (14), and the screw body (1) is provided with an anti-loosening assembly at the contraction groove (14) and the rotating groove (15).

2. A high load shear self tapping screw for a bracket according to claim 1, characterized in that: The inside wall of the top end of the contraction groove (14) is slidably connected with a positioning rod (141), the positioning rod (141) is slidably connected with the first sliding groove (151), and both sides of the positioning rod (141) are fixedly connected with limit sliding blocks (142).

3. A high load shear self tapping screw for a bracket according to claim 2, characterized in that: The anti-loosening assembly comprises a protection piece and an anti-loosening piece, the protection piece comprises a protection ring (21), the protection ring (21) is slidably connected in the inside of the contraction groove (14), the height of the protection ring (21) is greater than the depth of the contraction groove (14), and the outer wall of the protection ring (21) is fixedly connected with fixed blocks (211) in an annular array.

4. A high load shear self tapping screw for use in a bracket according to claim 3, characterized in that: The top end of the fixed block (211) is fixedly connected with the bottom end of the screw head (12), the bottom end of the protection ring (21) is provided with an anti-skid groove (212), and the middle part of the top end of the protection ring (21) is provided with a protection groove (213).

5. A high load shear self tapping screw for use in a bracket according to claim 4, characterized in that: The anti-loosening piece comprises a rotating ring (22), the rotating ring (22) is rotatably connected in the inside of the rotating groove (15), the outer wall of the top end of the rotating ring (22) is clamped with the positioning rod (141), and the rotating ring (22) is aligned with the protection groove (213).

6. A high load shear self tapping screw for use in a bracket according to claim 5, characterized in that: The bottom end of the rotating ring (22) is fixedly connected with anti-loosening rods (221) in an annular array.

7. A high load shear self tapping screw for a bracket according to claim 6, characterized in that: The anti-loosening rods (221) are located in the inside of the protection groove (213), and a hollow groove (222) is arranged in the inside of the top end of the rotating ring (22).

8. A high load shear self tapping screw for a bracket according to claim 1, characterized in that: The outer wall of the screw body (1) is fixedly connected with threads (11), and the top end of the screw head (12) is provided with a cross groove (13).

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