Anti-loosening self drilling screw

Abstract

The anti-loosening self drilling screw comprises a nut, a stud and a self drilling column, the stud is arranged at one end of the nut, the stud and the nut are integrally formed, an annular groove is formed in the bottom of the end, close to the stud, of the nut, an elastic cushion layer is installed in the annular groove, a connecting caulking groove is formed in the center of the elastic cushion layer, and the self drilling column is arranged in the connecting caulking groove. Balls are embedded in the connecting caulking grooves, a connecting ring is movably connected in the annular groove, an arc-shaped groove is formed in the center of the surface of the connecting ring, a plurality of arc iron sheets are installed at the bottom of the connecting ring, and a gasket is installed at the end, away from the connecting ring, of each arc iron sheet. The self-drilling screw has the advantages that distortion of the arc-shaped iron sheet is avoided, contact between the arc-shaped iron sheet and the stud is avoided, abrasion of threads is avoided, influence on screwing of the self-drilling screw is avoided, stability between the self-drilling screw and materials is improved, the anti-skid effect is good, and the loosening phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of self-drilling screws, in particular to an anti-loosening self-drilling screw. Background Art

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined plane circular rotation and friction of an object to gradually fasten the machine parts of an implement. A self-drilling screw is a screw with a self-tapping drill head at the front end. Screws are an invention shared by people in production and life for thousands of years. In terms of application fields, it is the first great invention of mankind. Self-drilling screws are a new invention in recent years and are also called self-drilling screws.

[0003] The utility model with the application number CN202322132544.0 discloses a self-drilling screw. By arranging a rotating ring in the rotating groove on the side of the nut close to the stud, when the ductile iron sheet on the rotating ring is located between the nut and the setting material, it can deform and extend. The extended iron sheet can increase the contact area between the nut and the setting material, effectively improving the stability between the nut and the setting material, and there is no need to sleeved a washer on the self-drilling screw, making the self-drilling screw more convenient to use.

[0004] The above device increases the contact area through the iron sheet to improve stability. When screwing in the self-drilling screw, it is necessary to manually support the iron sheet to prevent the iron sheet from falling off the stud. When the iron sheet deforms, the iron sheet is likely to scratch the operator, and the safety is poor. And when the support ring contacts the material, the rotating ring will be attached to the rotating groove through the iron sheet. When the self-drilling screw rotates, it is easy to twist the iron sheet, and the iron sheet is easily twisted into a twist shape, and the self-drilling screw cannot be completely tightened. The iron sheet is vertically arranged, and when the iron sheet deforms, the deformation direction of the iron sheet cannot be controlled, and the arc-shaped iron sheet is likely to contact the stud, easily causing wear to the thread.

[0005] It should be noted that the above content belongs to the technical cognition scope of the inventor and does not necessarily constitute the prior art. Content of the Utility Model

[0006] The purpose of the utility model is to solve the above problems and design an anti-loosening self-drilling screw.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A drill tail screw for preventing loosening, comprising a nut, a stud and a drill tail column. The stud is arranged at one end of the nut. The stud and the nut are integrally formed. A circular groove is provided at the bottom of the nut near one end of the stud. An elastic cushion layer is installed in the circular groove. A connecting groove is provided at the center of the elastic cushion layer. A ball is embedded in the connecting groove. A connecting ring is movably connected in the circular groove. An arc groove is provided at the center of the surface of the connecting ring. A plurality of arc-shaped iron sheets are installed at the bottom of the connecting ring. A gasket is installed at one end of the arc-shaped iron sheet away from the connecting ring.

[0009] Furthermore, a circular limiting groove is provided in the nut. The circular limiting groove communicates with the circular groove. A limiting ring is installed on the outer side of the connecting ring. The limiting ring is movably connected with the circular limiting groove.

[0010] Furthermore, two annular anti-slip layers I are provided on the bottom surface of the elastic cushion layer. The two annular anti-slip layers I are respectively located inside and outside the connecting groove. Two annular anti-slip layers II are provided on the surface of the connecting ring. The two annular anti-slip layers II are respectively located inside and outside the arc groove.

[0011] Furthermore, the circular groove, the connecting ring, the gasket and the stud are coaxially arranged.

[0012] Furthermore, one end of the drill tail column away from the stud is sharp. A plurality of drill grooves are provided on the outer wall of the drill tail column.

[0013] Compared with the prior art, the technical solution has the following beneficial effects:

[0014] As the stud is inserted into the material, the gasket applies pressure to the arc-shaped iron sheet. The arc-shaped iron sheet is bent and deformed under the pressure. The arc-shaped iron sheet bends outward from the stud, avoiding contact between the arc-shaped iron sheet and the stud, avoiding wear on the thread, avoiding affecting the tightening of the drill tail screw, increasing the stability with the material, and avoiding loosening.

[0015] When the drill tail screw is not tightened, there is a gap between the connecting ring and the elastic cushion layer through the ball. The rotation of the drill tail screw will not drive the gasket, the arc-shaped iron sheet and the connecting ring to rotate. The rotation of the drill tail screw is facilitated through the ball, avoiding the rotation of the connecting ring driven by the rotation of the drill tail screw and avoiding distortion of the arc-shaped iron sheet.

[0016] After the drill tail screw is tightened, the ball will apply pressure to the elastic cushion layer. The elastic cushion layer is elastic and can be deformed. The ball is embedded into the connecting groove, making the bottom surface of the elastic cushion layer contact with the surface of the connecting ring, enabling the annular anti-slip layer I and the annular anti-slip layer II to contact and fit, with good anti-slip effect and avoiding loosening.

[0017] The connecting ring is limited by the limiting ring and the circular limiting groove to prevent the connecting ring from falling off the circular ring groove. When screwing the self-drilling screw, there is no need to hold the gasket, which makes the installation convenient. It can avoid the deformation of the arc-shaped iron sheet from causing harm to personnel and improves safety. Brief Description of the Drawings

[0018] Figure 1 This is a schematic structural diagram of a self-drilling screw with anti-loosening function of the present utility model.

[0019] Figure 2 This is a diagram showing the rising state of the connecting ring.

[0020] Figure 3 This is Figure 1 a partial enlarged view of part A in

[0021] Figure 4 This is Figure 2 a partial enlarged view of part B in

[0022] Figure 5 This is an enlarged bottom view of the elastic cushion layer.

[0023] Figure 6 This is an enlarged top view of the connecting ring.

[0024] In the figure: 1, nut; 2, stud; 3, self-drilling column; 4, circular ring groove; 5, elastic cushion layer; 6, connecting groove; 7, ball; 8, connecting ring; 9, arc groove; 10, arc-shaped iron sheet; 11, gasket; 12, circular limiting groove; 13, limiting ring; 14, first annular anti-slip layer; 15, second annular anti-slip layer; 16, drilling groove. Detailed Embodiment

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, in the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0027] The present utility model provides a drill tail screw for preventing loosening as shown in Figures 1-6 which includes a nut 1, a stud 2 and a drill tail column 3. The stud 2 is provided at one end of the nut 1, and the stud 2 and the nut 1 are integrally formed. A circular ring groove 4 is provided at the bottom of the nut 1 near one end of the stud 2. An elastic cushion layer 5 is installed in the circular ring groove 4. A connecting embedding groove 6 is provided at the center of the elastic cushion layer 5. A ball 7 is embedded in the connecting embedding groove 6. A connecting ring 8 is movably connected in the circular ring groove 4. An arc-shaped groove 9 is provided at the center of the surface of the connecting ring 8. A plurality of arc-shaped iron sheets 10 are installed at the bottom of the connecting ring 8. A gasket 11 is installed at one end of the arc-shaped iron sheet 10 away from the connecting ring 8.

[0028] When in use, the nut 1 is screwed by a wrench. The drill tail column 3 at the bottom of the stud 2 contacts and drills into the material. When the gasket 11 does not contact the material, it is in the Figure 1 state. When the gasket 11 contacts the material, it is in the Figure 2 state. As the stud 2 is inserted into the material, the gasket 11 applies pressure to the arc-shaped iron sheet 10. The arc-shaped iron sheet 10 is bent and deformed under the pressure. The arc-shaped iron sheet 10 bends outward from the stud 2, avoiding contact between the arc-shaped iron sheet 10 and the stud 2, avoiding wear on the thread, avoiding affecting the tightening of the drill tail screw, increasing the stability with the material, and avoiding the phenomenon of loosening. When tightening the drill tail screw, after the gasket 11 contacts the material, the gasket 11, the arc-shaped iron sheet 10 and the connecting ring 8 do not rotate. The nut 1 drives the stud 2 and the drill tail column 3 to rotate. When the drill tail screw is not tightened, there is a gap between the connecting ring 8 and the elastic cushion layer 5 through the ball 7. The drill tail screw rotates conveniently through the ball 7, avoiding driving the connecting ring 8 to rotate when the drill tail screw rotates and avoiding bending the arc-shaped iron sheet 10.

[0029] Referring to the attached Figure 3 of the specification and the attached Figure 4 of the specification, a circular limiting groove 12 is provided in the nut 1. The circular limiting groove 12 communicates with the circular ring groove 4. A limiting ring 13 is installed on the outer side of the connecting ring 8. The limiting ring 13 is movably connected with the circular limiting groove 12.

[0030] The connecting ring 8 is limited by the limiting ring 13 and the circular limiting groove 12 to prevent the connecting ring 8 from falling off the circular ring groove 4. When turning the self-drilling screw, there is no need to support the gasket 11, which makes the installation convenient. It can avoid the deformation of the arc-shaped iron sheet 10 from causing harm to personnel, improving safety. The connecting ring 8 can drive the limiting ring 13 to lift and rotate in the circular limiting groove 12.

[0031] Refer to the attached Figure 3 , the attached Figure 4 , the attached Figure 5 and the attached Figure 6 , two annular anti-slip layers 14 are provided on the bottom surface of the elastic cushion layer 5, and the two annular anti-slip layers 14 are respectively located inside and outside the connecting groove 6. Two annular anti-slip layers 15 are provided on the surface of the connecting ring 8, and the two annular anti-slip layers 15 are respectively located inside and outside the arc-shaped groove 9.

[0032] After tightening the self-drilling screw, the ball 7 will apply pressure to the elastic cushion layer 5. The elastic cushion layer 5 is elastic and can deform. The ball 7 is embedded into the connecting groove 6, so that the bottom surface of the elastic cushion layer 5 contacts the surface of the connecting ring 8, which can make the annular anti-slip layer 14 and the annular anti-slip layer 15 contact and fit well, with good anti-slip effect and avoiding loosening.

[0033] Refer to the attached Figure 1 and the attached Figure 2 , the end of the self-drilling column 3 away from the stud 2 is sharp, and a plurality of drilling grooves 16 are provided on the outer wall of the self-drilling column 3.

[0034] When drilling with the self-drilling column 3 through the drilling grooves 16, the items can be broken separately, which is more convenient to enter the material interior, saving time and effort.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drill tail screw for preventing loosening, comprising a nut (1), a stud (2) and a drill tail column (3). The stud (2) is arranged at one end of the nut (1), and the stud (2) and the nut (1) are integrally formed. It is characterized in that, A circular ring groove (4) is provided at the bottom of one end of the nut (1) close to the stud (2). An elastic cushion layer (5) is installed in the circular ring groove (4). A connecting embedding groove (6) is provided at the center of the elastic cushion layer (5). A ball (7) is embedded in the connecting embedding groove (6). A connecting ring (8) is movably connected in the circular ring groove (4). An arc-shaped groove (9) is provided at the center of the surface of the connecting ring (8). A plurality of arc-shaped iron sheets (10) are installed at the bottom of the connecting ring (8). A gasket (11) is installed at one end of the arc-shaped iron sheet (10) away from the connecting ring (8).

2. The self-drilling screw for preventing loosening according to claim 1, wherein, A circular limiting groove (12) is provided in the nut (1). The circular limiting groove (12) communicates with the circular ring groove (4). A limiting ring (13) is installed on the outer side of the connecting ring (8). The limiting ring (13) is movably connected with the circular limiting groove (12).

3. The drill tail screw for preventing loosening according to claim 1, characterized in that, Two annular anti-slip layers I (14) are provided on the bottom surface of the elastic cushion layer (5). The two annular anti-slip layers I (14) are respectively located on the inner and outer sides of the connecting embedding groove (6). Two annular anti-slip layers II (15) are provided on the surface of the connecting ring (8). The two annular anti-slip layers II (15) are respectively located on the inner and outer sides of the arc-shaped groove (9).

4. The drill point self-drilling screw according to claim 1, wherein, The circular ring groove (4), the connecting ring (8), the gasket (11) and the stud (2) are coaxially arranged.

5. The drill tail screw for preventing loosening according to claim 1, characterized in that, One end of the self-drilling screw shank (3) away from the stud (2) is sharp. A plurality of drill grooves (16) are provided on the outer wall of the self-drilling screw shank (3).

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