Self drilling screw with anti-falling function

Abstract

The utility model discloses a self drilling screw with an anti-falling function, which comprises a nut, the bottom of the nut is fixedly connected with a filling seat, the bottom of the filling seat is fixedly connected with a screw rod, one end of the screw rod is provided with a sliding chute, one end of the screw rod is slidably provided with a self drilling block through the sliding chute, the bottom of the self drilling block is fixedly provided with a drill bit, and the bottom of the drill bit is fixedly provided with a screw rod. And a dragging landfill rope is fixedly arranged at one end of the screw rod, and a reed is fixedly connected to the interior of the tail drilling block. According to the self-drilling screw with the anti-falling function, the reed structure designed on the screw can play a role in fixing the installation of the screw in the use process of the screw, when the screw is vibrated or subjected to external force, extra resistance is provided, the screw is prevented from loosening, the position of a drill bit is prevented from expanding, the expansion principle is adopted, and the anti-falling function is achieved. Therefore, friction force is generated, abrasion and looseness of the screws are reduced, and maintenance cost and frequency can be reduced.

Description

Technical Field

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

[0002] In the utility model patent application with application publication number CN105156434B, application publication date 2017.11.10, and titled "A self-drilling screw for steel structure", the present invention discloses a self-drilling screw for steel structure, comprising a screw, a steel sheet and a waterproof pad, wherein the screw is provided with a nut, a screw rod, a screw head and screw teeth, the nut is located above the screw teeth, the screw teeth are located above the screw rod, the screw rod is located above the screw head, the nut is provided with a flat groove and a cap edge, no ring surface and arc surface are provided under the cap edge, the screw rod is provided with a tooth pattern, the lower part of the screw head is provided with an oblique tip, the steel sheet is installed under the nut, the steel sheet is provided with a through hole, a boss, a plate surface, an inclined surface and a foot plate, the through hole is coaxially matched with the screw rod, the upper end of the waterproof pad is in contact with the lower end of the steel sheet, and the axial hole and screw rod are coaxially matched. The present invention provides a flat groove and a cap edge on the screw cap, installs a steel sheet under the screw cap, fits the upper end of the waterproof pad with the lower end of the steel sheet, and the axial hole and screw rod are coaxially matched, so that the self-drilling screw has sufficient strength and waterproof function, thereby ensuring its stable working performance and improving its service life.

[0003] In the prior art including the above-mentioned patents, after use, the self-drilling screws may fall off or loosen due to external pressure or vibration after being fixed for a long time, resulting in an unstable structure. At the same time, during the drilling operation, the self-drilling screws may break and fall during the insertion process. The broken drill tails may splash and cause personal injury. Therefore, it is necessary to design a self-drilling screw with an anti-fall function. Utility Model Content

[0004] The purpose of the utility model is to provide a self-drilling screw with an anti-drop function, so as to solve the problem of loosening caused by long-term fixation proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a drill screw with an anti-drop function, comprising a nut, a filling seat fixedly connected to the bottom of the nut, a screw fixedly connected to the bottom of the filling seat, a slide groove provided at one end of the screw, a drill block slidably installed on one end of the screw through the slide groove, a drill bit fixed at the bottom of the drill block, a pulling and filling rope fixedly provided at one end of the screw, and a spring fixedly connected to the inside of the drill block.

[0006] Furthermore, a filling hole is opened on the outer wall of the filling seat, and a plurality of the filling holes are provided, and the plurality of filling holes are arranged along the midpoint circumference of the nut.

[0007] Furthermore, a protective cap is snap-fitted to the outer wall of the nut, and a hexagram groove is provided on the top of the nut.

[0008] Furthermore, the plane diameter of the filling seat is smaller than the plane diameter of the nut, and the interior of the filling seat is filled with foam filler.

[0009] Furthermore, the drill tail blocks are symmetrically positioned along the center line of the slide groove, and the drill tail blocks are connected by springs.

[0010] Furthermore, the other end of the pulling and embedding rope is connected to the midpoint of the spring leaf, and one end of the pulling and embedding rope is embedded in the interior of the screw rod.

[0011] Furthermore, the top of the drill bit is dovetail-shaped, and the connection surface between the drill bit and the drill tail block is larger than the connection surface of the drill tail block.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the self-drilling screw with the anti-drop function is reasonable and has the following advantages:

[0013] (1) The spring structure designed in the screw itself can play a role in fixing the installation of the screw itself during use. When the screw is vibrated or subjected to external force, it provides additional resistance to prevent the screw from loosening. The expansion principle is adopted. When drilling, the drill tail block and the drill bit position are blocked due to the downward pressure. The symmetrical drill tail blocks are affected by the force of drilling and squeezed together to perform the drilling operation. After the hole is opened, the screw is screwed into the hole by the rotation force. The spring pushes the drill tail blocks on both sides outward, and the drill bit position expands, which generates friction and reduces the wear and loosening of the screw, thereby reducing the maintenance cost and frequency.

[0014] (2) The pulling and filling rope reserved inside the screw is used to pull the drill bit during drilling, thereby controlling the drill tail block that breaks unexpectedly, preventing the breakage caused by excessive force during drilling and the splashing phenomenon after the force disappears, which may cause personal injury. At the same time, the pulling and filling rope can improve the connection strength, extend the service life of the screw, improve the connection conditions between the overall structure of the screw, prevent rust, earthquake resistance, loosening, and facilitate maintenance;

[0015] (3) By directly filling the filling seat with foam filler, irregular cutting surfaces and gaps can be easily filled without contaminating the wall surface. It is suitable for opening door holes when rearranging the space during decoration. It has strong adaptability and can fill these gaps well. The filler at the filling position is elastic and can cater to the thermal expansion and contraction of the door, providing better adaptability and good adhesion. Compared with cement, it has better adhesion, making the screws more fixed to the construction position, fast construction speed, and environmental protection. For light materials, it can provide sufficient fixing effect and play the role of bonding and sealing. Due to the high closed-cell rate after the screw is filled, the solidified foam filler does not crack, corrode, or fall off, and can be moisture-proof to prevent rust in the later stage. After solidification, it has the function of waterproofing and moisture-proofing the screw itself. The screw is suitable for a variety of material surfaces, such as concrete, coating, wall, wood and plastic surface, and is convenient for later filling. The filling hole can be used to directly fill the surrounding punched gaps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the front view of the utility model;

[0017] Figure 2 This is a top view of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the drill tail block and the spring of the utility model;

[0019] Figure 4 This is a side view of the utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure of the chute and the drill tail block of the utility model.

[0021] In the figure: 1. Nut; 2. Filling seat; 3. Screw; 4. Slide; 5. Drill tail block; 6. Drill bit; 7. Pull-in landfill rope; 8. Spring; 9. Filling hole; 10. Protective cap. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-5 , a technical solution provided by the utility model:

[0024] Example 1:

[0025] A self-drilling screw with an anti-drop function includes a nut 1, a filling seat 2 is fixedly connected to the bottom of the nut 1, a screw rod 3 is fixedly connected to the bottom of the filling seat 2, a slide groove 4 is provided at one end of the screw rod 3, a drill block 5 is slidably installed on one end of the screw 3 through the slide groove 4, a drill bit 6 is fixed to the bottom of the drill block 5, a pulling and filling rope 7 is fixedly provided at one end of the screw 3, and a spring 8 is fixedly connected to the inside of the drill block 5.

[0026] The above structure, through the spring 8 structure designed for the screw itself, can fix the installation of the screw itself during use, and provide additional resistance to prevent the screw from loosening when the screw is vibrated or subjected to external force.

[0027] Furthermore, a filling hole 9 is opened on the outer wall of the filling seat 2 , and a plurality of filling holes 9 are provided, and the plurality of filling holes 9 are arranged along the midpoint circumference of the nut 1 .

[0028] The above structure fills the gap where the screw is screwed into with a foaming agent through the filling hole 9, which can prevent rust and falling off.

[0029] Furthermore, the outer wall of the nut 1 is snap-connected with a protective cap 10 , and a hexagonal groove is formed on the top of the nut 1 .

[0030] The above structure is used for subsequent operations through the hexagonal socket, so that the screw has a fulcrum and is easy to screw in.

[0031] Furthermore, the plane diameter of the filling seat 2 is smaller than the plane diameter of the nut 1 , and the interior of the filling seat 2 is filled with foam filler.

[0032] The above structure limits and seals the entrance position after the nail is inserted through the filling seat 2.

[0033] Furthermore, the drill tail blocks 5 are symmetrically positioned along the center line of the slide groove 4 , and the drill tail blocks 5 are connected by springs 8 .

[0034] The above structure generates an expansion effect through the spring 8, so that after drilling, it expands and fills, preventing the screw from falling off.

[0035] Furthermore, the other end of the pulling and burying rope 7 is connected to the midpoint of the spring 8 , and one end of the pulling and burying rope 7 is buried inside the screw 3 .

[0036] As a result, the drill bit 6 is connected by pulling the landfill rope 7, and the pulling force of the landfill rope 7 is utilized to prevent the drill bit 6 from breaking and splashing when the drill bit 6 breaks.

[0037] Furthermore, the top of the drill bit 6 is dovetail-shaped, and the connection surface between the drill bit 6 and the drill tail block 5 is larger than the connection surface of the drill tail block 5 .

[0038] The above result is that the dovetail-shaped drill bit 6 allows direct drilling operation when in use, and when the two ends are squeezed by force, the positions of the drill bit 6 fit together.

[0039] Working principle: When in use, the drill screw itself can first be used for drilling operations. When drilling, the drill block 5 and the drill bit 6 are blocked due to the downward pressure. The symmetrical drill blocks 5 are affected by the drilling force and squeezed together to perform the drilling operation. After the hole is opened, the screw 3 is screwed into the hole by the rotation force. The spring 8 pushes the drill blocks 5 on both sides outward, and the drill bit 6 position expands. The spring 8 structure designed in the screw itself can fix the installation of the screw itself during use. When the screw is vibrated or subjected to external force, it provides additional resistance to prevent the screw from loosening. The expansion principle is used to generate friction, reduce the wear and loosening of the screw, and thus reduce the maintenance cost and frequency.

[0040] Secondly, the pulling and filling rope 7 reserved inside the screw 3 is pulled during the drilling process at the drill bit 6 to control the drill tail block 5 that is accidentally broken, thereby preventing the breakage caused by excessive force during drilling and the splashing phenomenon after the force is eliminated, which may cause personal injury. At the same time, the pulling and filling rope 7 can improve the connection strength, extend the service life of the screw, improve the connection conditions between the overall structure of the screw, prevent rust, shock and loosening, and facilitate maintenance;

[0041] Finally, by directly filling the filling seat 2 with foam filler, irregular cutting surfaces and gaps can be easily filled. Due to the high closed-cell rate after the screw is filled, the solidified foam filler does not crack, corrode, or fall off, and can be moisture-proof to prevent rust in the later stage. After solidification, the screw itself is waterproof and moisture-proof. The screw is suitable for a variety of material surfaces, such as concrete, coatings, walls, wood and plastic surfaces, and is easy to fill in the later stage. The filling hole 9 can be used to directly fill the surrounding punched gaps.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A self-drilling screw with an anti-drop function, comprising a nut (1), characterized in that: The bottom of the nut (1) is fixedly connected to a filling seat (2), the bottom of the filling seat (2) is fixedly connected to a screw (3), one end of the screw (3) is provided with a slide groove (4), one end of the screw (3) is slidably mounted with a drill tail block (5) through the slide groove (4), the bottom of the drill tail block (5) is fixed with a drill bit (6), one end of the screw (3) is fixedly provided with a pulling landfill rope (7), and the interior of the drill tail block (5) is fixedly connected with a spring (8).

2. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The outer wall of the filling seat (2) is provided with a filling hole (9), and a plurality of the filling holes (9) are provided, and the plurality of filling holes (9) are arranged along the circumference of the midpoint of the nut (1).

3. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The outer wall of the nut (1) is snap-connected with a protective cap (10), and a hexagram groove is provided on the top of the nut (1).

4. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The plane diameter of the filling seat (2) is smaller than the plane diameter of the nut (1), and the interior of the filling seat (2) is filled with foam filler.

5. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The drill tail blocks (5) are symmetrically positioned along the center line of the slide groove (4), and the drill tail blocks (5) are connected by springs (8).

6. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The other end of the pulling and burying rope (7) is connected to the midpoint of the spring (8), and one end of the pulling and burying rope (7) is buried inside the screw (3).

7. The self-drilling screw with an anti-drop function according to claim 1, characterized in that: The top of the drill bit (6) is dovetail-shaped, and the connection surface between the drill bit (6) and the drill tail block (5) is larger than the connection surface of the drill tail block (5).

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