Countersunk self-drilling screw

Abstract

A sliding groove is formed in the screw, a sliding rod is arranged in the sliding groove in a sliding mode, a plurality of liquid passing holes communicated with the bottom of the sliding groove are formed in the screw, a glue capsule is placed at the bottom of the sliding groove, a second external thread is arranged outside the top of the sliding rod, and a second external thread is arranged outside the top of the sliding rod. And a first internal thread is formed in the sliding groove, the second external thread is in threaded connection with the first internal thread, and when the sliding rod is screwed downwards, the sliding rod bursts the glue capsule to be broken, so that glue in the glue capsule flows into the space between the screw and the wood board from the liquid passing hole. The sliding rod capable of moving up and down and the glue capsule are additionally arranged in the screw, after the screw is screwed into a steel plate and a wood plate, the sliding rod is rotated to extrude the glue capsule, glue in the glue capsule flows into a gap between threads of the screw and the wood plate through the liquid passing hole, the screw and the wood plate are glued, and the installation stability is enhanced; and the installation stability is improved while efficient installation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-drilling screws, in particular to a countersunk head self-drilling screw. Background Art

[0002] The tail of the self-drilling screw is in the shape of a drill tail or a pointed tail, without the need for auxiliary processing, and can directly drill holes, tap threads, and lock on the set material and the base material, greatly saving construction time. Compared with ordinary screws, it has high toughness pulling force and maintaining force, and will not loosen even after a long time of combination. The operation of drilling holes and tapping threads is completed at one time, and the use is safe and the operation is simple. It is mostly used for fixing color steel tiles of steel structures and can also be used for fixing thin plates of simple buildings.

[0003] When locking and fixing a steel plate and a wooden board, the prior art often adopts the method of first drilling a hole, then spraying glue into the hole of the wooden board, and then screwing the screw into the hole to enhance the stability of the screw locking. However, the installation efficiency is low, and the use of self-drilling screws can improve the installation efficiency, but it is impossible to use glue to improve the stability. Therefore, the utility model provides a self-drilling screw that can use glue to improve the stability and is efficient. Content of the Utility Model

[0004] The purpose of the utility model is to provide a countersunk head self-drilling screw to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A countersunk head self-drilling screw, comprising: a screw and a drill tail, the drill tail is located at the bottom end of the screw, a chute is opened in the screw, a sliding rod is slidably arranged in the chute, a plurality of liquid passing holes communicating with the bottom of the chute are opened in the screw, a glue capsule is placed at the bottom of the chute, a second external thread is opened on the outer side of the top of the sliding rod, a first internal thread is opened in the chute, and the second external thread is threadedly connected with the first internal thread. When the sliding rod is screwed downward, the sliding rod pierces the glue capsule, so that the glue in the glue capsule flows into the space between the screw and the wooden board through the liquid passing holes.

[0006] Further, the bottom of the sliding rod is fixedly connected with a needle head, and a silica gel sleeve is fixedly sleeved outside the needle head, and the outer wall of the silica gel sleeve closely adheres to the inner wall of the chute.

[0007] Further, it further comprises a beautiful cover, a second internal thread is opened on the beautiful cover, and a plurality of semi-circular protrusions are equidistantly arranged on the outer side surface of the screw, and the beautiful cover is clamped outside the screw through the plurality of semi-circular protrusions.

[0008] Further, a first external thread is opened on the screw, the first external thread is located below the semi-circular protrusions, and the second internal thread is threadedly connected with the first external thread.

[0009] Further, a silica gel head is fixedly connected to the central area inside the aesthetic cover, and the silica gel head is inserted into the sliding groove.

[0010] Further, anti-loosening teeth are provided at the bottom of the screw.

[0011] In the above technical solution, the beneficial effects of a countersunk drill tail screw provided by the present utility model are as follows:

[0012] By adding a slidable rod and a glue capsule inside the screw, after the screw is screwed into the steel plate and the wooden board, the rod is rotated to burst the glue capsule, and the glue in the glue capsule flows into the gap between the screw threads of the screw and the wooden board through the liquid passing holes, thereby gluing the screw and the wooden board, enhancing the stability of the installation, and achieving efficient installation while improving the stability of the installation.

[0013] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0014] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0016] Figure 1 It is a schematic structural diagram provided by an embodiment of the present utility model;

[0017] Figure 2 Provided by an embodiment of the present utility model Figure 1 An enlarged view of part A;

[0018] Figure 3 Provided by an embodiment of the present utility model Figure 1 An enlarged view of part B;

[0019] Figure 4 Provided by an embodiment of the present utility model Figure 1 An enlarged view of part C.

[0020] Description of the reference numerals:

[0021] 1. Screw; 11. Slide groove; 111. First internal thread; 12. First external thread; 13. Liquid passing hole; 2. Drill tail; 3. Aesthetic cover; 31. Second internal thread; 32. Silicone head; 4. Slide rod; 41. Second external thread; 5. Silicone sleeve; 6. Needle; 7. Glue capsule; 8. Semi-circular protrusion; 9. Anti-loosening teeth. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0023] Please refer to Figures 1-4 , a countersunk head drill tail screw, comprising: a screw 1 and a drill tail 2. The drill tail 2 is located at the bottom end of the screw 1. The screw 1 and the drill tail 2 are processed from the same cylindrical steel. A slide groove 11 is formed in the screw 1. A slide rod 4 is slidably disposed in the slide groove 11. A plurality of liquid passing holes 13 communicating with the bottom of the slide groove 11 are formed in the screw 1. A glue capsule 7 is placed at the bottom of the slide groove 11. The glue capsule 7 is a capsule filled with glue inside. A second external thread 41 is formed on the outer surface of the top of the slide rod 4. A first internal thread 111 is formed in the slide groove 11. The second external thread 41 is threadedly connected to the first internal thread 111. When the slide rod 4 is screwed downward, the slide rod 4 pierces the glue capsule 7, so that the glue in the glue capsule 7 flows into the space between the screw 1 and the wooden board through the liquid passing holes 13.

[0024] Specifically, in the present utility model, by adding a slidable slide rod 4 and a glue capsule 7 in the screw 1, after the screw 1 is screwed into the steel plate and the wooden board, the slide rod 4 is rotated to squeeze and burst the glue capsule 7. Then, the glue in the glue capsule 7 flows into the gap between the thread of the screw 1 and the wooden board through the liquid passing holes 13, gluing the screw 1 and the wooden board together, enhancing the stability of the installation, and achieving efficient installation while improving the stability of the installation.

[0025] Further, a needle 6 is fixedly connected to the bottom of the slide rod 4. The needle 6 is a thin round rod with a pointed tip at the bottom end. A silicone sleeve 5 is fixedly sleeved outside the needle 6. The outer wall of the silicone sleeve 5 closely adheres to the inner wall of the slide groove 11.

[0026] Specifically, referring to Figure 1 and Figure 2 , when the slide rod 4 is rotated and screwed downward, the needle 6 pierces the glue capsule 7, and the glue in the glue capsule 7 flows into the slide groove 11. As the slide rod 4 continues to descend, the glue is squeezed into the gap between the thread and the wood.

[0027] Further, it further includes a decorative cap 3. A second internal thread 31 is provided on the decorative cap 3. A plurality of semi-circular protrusions 8 are equidistantly arranged on the outer side surface of the screw 1. The semi-circular protrusions 8 are fixedly connected to the side surface of the screw 1. The decorative cap 3 is clamped outside the screw 1 through the plurality of semi-circular protrusions 8. When the self-drilling screw provided in this application is not in use, the decorative cap 3 is clamped on the top of the screw 1 through the semi-circular protrusions 8 provided on the screw 1, which is convenient for removing the decorative cap 3 when using the self-drilling screw.

[0028] Further, a first external thread 12 is provided outside the screw 1. The first external thread 12 is located below the semi-circular protrusions 8. The second internal thread 31 is threadedly connected to the first external thread 12.

[0029] Specifically, referring to Figure 1 and Figure 4 , after the self-drilling screw is completely installed in the steel plate and the wooden board, the decorative cap 3 is sleeved outside the screw 1, and the decorative cap 3 is pressed so that the decorative cap 3 crosses the semi-circular protrusions 8, and then the decorative cap 3 is screwed, so that the decorative cap 3 is threadedly connected to the screw 1, increasing the aesthetics of the screw 1.

[0030] Further, a silica gel head 32 is fixedly connected to the central area inside the decorative cap 3. The silica gel head 32 is inserted into the chute 11.

[0031] Specifically, referring to Figure 1 , when the decorative cap 3 is threadedly connected outside the screw 1, the silica gel head 32 is screwed into the chute 11 to seal the chute 11, preventing external moisture from entering the chute 11 and extending the service life of the self-drilling screw.

[0032] Further, a locking tooth 9 is provided at the bottom of the screw 1.

[0033] Specifically, referring to Figure 1 , by providing a locking tooth 9 at the bottom of the screw 1 to enhance the anti-loosening ability of the self-drilling screw, and increasing the friction between the bottom of the screw 1 and the steel plate to achieve the purpose of enhancing the anti-loosening ability.

[0034] In this utility model, referring to Figures 1 to 4 , first, the decorative cap 3 is taken away from the screw 1, and then the screw 1 is screwed into the steel plate and the wooden board by a motor-driven screwdriver to realize the locking of the steel plate and the wooden board. Subsequently, the slide rod 4 is selected into the deep part of the chute 11 by an electric screwdriver, so that the needle head 6 pierces the glue capsule 7, and the glue in the glue capsule 7 flows out. Under the extrusion of the silica gel sleeve 5, the glue flows into the gap between the thread and the wooden board through the liquid passing hole 13. Finally, the decorative cap 3 is covered on the screw 1 and tightened outside the screw 1 to complete the installation of the self-drilling screw.

[0035] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A countersunk self-drilling screw, comprising: A screw (1) and a drill tail (2), characterized in that: the drill tail (2) is located at the bottom end of the screw (1), a slide groove (11) is provided in the screw (1), a slide rod (4) is slidably arranged in the slide groove (11), a plurality of liquid holes (13) connected to the bottom of the slide groove (11) are provided in the screw (1), a glue capsule (7) is placed at the bottom of the slide groove (11), a second external thread (41) is provided on the top of the slide rod (4), a first internal thread (111) is provided in the slide groove (11), the second external thread (41) is threadedly connected with the first internal thread (111), when the slide rod (4) is twisted and screwed downward, the slide rod (4) breaks the glue capsule (7), so that the glue in the glue capsule (7) flows from the liquid hole (13) into between the screw (1) and the wooden board.

2. A countersunk self-drilling screw according to claim 1, characterized in that: The bottom of the slide rod (4) is fixedly connected with a needle (6), and the needle (6) is fixedly sleeved with a silicone sleeve (5), and the outer wall of the silicone sleeve (5) is tightly attached to the inner wall of the slide groove (11).

3. A countersunk self-drilling screw according to claim 2, characterized in that: It also comprises an aesthetic cover (3), on which a second internal thread (31) is formed, and a plurality of semicircular protrusions (8) are arranged at equal intervals on the outer surface of the screw (1), and the aesthetic cover (3) is clamped on the outside of the screw (1) via the plurality of semicircular protrusions (8).

4. A countersunk self-drilling screw according to claim 3, characterized in that: The screw (1) is provided with a first external thread (12), the first external thread (12) is located below the semicircular protrusion (8), and the second internal thread (31) is threadedly connected to the first external thread (12).

5. The countersunk self-drilling screw according to claim 4, characterized in that: A silicone head (32) is fixedly connected to the central area of ​​the aesthetic cover (3), and the silicone head (32) is inserted into the slide groove (11).

6. The countersunk self-drilling screw according to claim 1, characterized in that: The bottom of the screw (1) is provided with anti-loosening teeth (9).

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