High-strength self drilling screw

Abstract

The utility model discloses a high-strength self-drilling screw, belongs to the technical field of fasteners, and solves the problems that an existing self-drilling screw is mainly connected with wood in a matched mode in the using process, however, the wood is easier to absorb moisture compared with other materials, and the service life of the self-drilling screw is prolonged. Therefore, compared with other conditions, the screw head of the self drilling screw is more prone to rusting, and finally normal unscrewing of the self drilling screw is difficult. Comprising a stud, a screw head fixedly connected to the upper end of the stud and a protective sleeve detachably connected to the outer side of the screw head, a cross groove is formed in the side, away from the stud, of the screw head, and the inner side of the protective sleeve is coated with a silica gel coating. The drill bit is made of hard alloy materials, is high in strength, can break various kinds of wood, is not prone to damage, and can be repeatedly used. The inserting columns are made of hard alloy materials, and the studs are made of carbon steel or stainless steel materials, so that the structural strength is good, and bending and breaking are not prone to occurring. After the self-drilling screw is fixed, the protective sleeve insertion thorns are inserted into a wood structure, gaps are reduced in cooperation with the silica gel coating, and the screw head is prevented from rusting.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a high-strength self-drilling screw. Background Technology

[0002] A self-drilling screw is a screw with a built-in drill bit, enabling quick tightening. Its drill bit can directly penetrate the material without pre-drilling, saving time and effort. The threaded design provides tightening force, and various head types are available, such as flat head and round head. The material is typically carbon steel or stainless steel, possessing high hardness and strength, suitable for joining materials such as wood, and widely used in construction, electromechanical installation, and other fields.

[0003] Currently, self-drilling screws are mainly used in conjunction with wood. However, wood is more prone to absorbing moisture than other materials, which makes the screw head more susceptible to rusting and ultimately makes it difficult to unscrew properly.

[0004] Therefore, a high-strength self-drilling screw is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-strength self-drilling screw.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-strength self-drilling screw includes a stud, a screw head fixedly connected to the upper end of the stud, and a protective sleeve detachably connected to the outside of the screw head. The screw head has a cross groove on the side away from the stud. The inner side of the protective sleeve is coated with a silicone coating. When the protective sleeve and the screw head are detachably connected, the silicone coating is held between the protective sleeve and the screw head.

[0008] Preferably, the screw head has a through groove located on the outer ring of the cross groove, and the inner top surface of the protective sleeve is fixedly connected with a piercing bar that can penetrate the through groove.

[0009] Preferably, the piercing is in the shape of a four-sided pyramid, and the inner wall of the groove is fitted to the outer ring of the piercing.

[0010] Preferably, the end of the stud away from the screw head has an insertion hole communicating with the bottom of the cross groove. A insert post is detachably connected in the insertion hole. A drill bit coaxially arranged with the stud is fixedly connected to the end of the insert post away from the screw head. The length of the insert post is less than or equal to the groove depth of the insertion hole.

[0011] Preferably, the stud and the screw head are integrally formed, and the insert and the drill bit are integrally formed.

[0012] Preferably, the stud and screw head are made of carbon steel or stainless steel, and the protective sleeve, piercing, stud and drill bit are made of cemented carbide.

[0013] This utility model has the following beneficial effects:

[0014] This utility model's drill bit is made of cemented carbide, which has high strength, can break through various types of wood without easily being damaged, and is reusable. The insert is made of cemented carbide, and the stud is made of carbon steel or stainless steel, providing good structural strength and preventing bending or breakage. After the drill bit is fixed, the protective sleeve insert is inserted into the wood structure, and the silicone coating reduces the gap and prevents the screw head from rusting. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 For the explosion of this utility model Figure 1 ;

[0018] Figure 3 For the explosion of this utility model Figure 2 .

[0019] In the diagram: 1. Stud; 2. Threaded head; 3. Drill bit; 4. Insert pin; 5. Insertion hole; 6. Cross groove; 7. Through groove; 8. Protective sleeve; 9. Spike. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] A high-strength self-drilling screw, such as Figures 1 to 3 As shown, it includes a stud 1, a screw head 2 fixedly connected to the upper end of the stud 1, and a protective sleeve 8 detachably connected to the outside of the screw head 2. The screw head 2 has a cross groove 6 on the side away from the stud 1. The inner side of the protective sleeve 8 is coated with a silicone coating. When the protective sleeve 8 and the screw head 2 are detachably connected, the silicone coating is sandwiched between the protective sleeve 8 and the screw head 2.

[0027] The screw head 2 has a through groove 7 located on the outer ring of the cross groove 6. The inner top surface of the protective sleeve 8 is fixedly connected with a piercing 9 that can penetrate the through groove 7. The piercing 9 is in the shape of a four-sided pyramid, and the inner wall of the through groove 7 is fitted to the outer ring of the piercing 9.

[0028] The stud 1 has an insertion hole 5 at the end away from the screw head 2, which communicates with the bottom of the cross groove 6. An insertion post 4 is detachably connected in the insertion hole 5. A drill bit 3, which is coaxially arranged with the stud 1, is fixedly connected at the end of the insertion post 4 away from the screw head 2. The length of the insertion post 4 is less than or equal to the groove depth of the insertion hole 5. The stud 1 and screw head 2 are integrally formed structures, and the insertion post 4 and drill bit 3 are integrally formed structures. The stud 1 and screw head 2 are made of carbon steel or stainless steel. The protective sleeve 8, the piercing 9, the insertion post 4, and the drill bit 3 are made of cemented carbide.

[0029] In practical use, the drill bit 3, made of carbide, possesses high strength. Regardless of the hardness of the wood structure it's installed on, it can easily break through without damage, allowing for reuse in future applications. Furthermore, the use of carbide for the insert 4 and carbon steel or stainless steel for the stud 1 ensures the overall structure of the stud 1 maintains good strength and hardness, preventing easy bending or breakage. And when the drill bit is used... When rotation is required, simply insert a screwdriver into the cross groove 6 to rotate the screw head 2 and stud 1. After the self-drilled screw has completed its fixing action, simply align the spike 9 on the protective sleeve 8 with the through groove 7, and then put the protective sleeve 8 on the outside of the screw head 2. The spike 9 penetrates the through groove 7 and is accommodated within the through groove 7. The spike 9 can be inserted into the wood structure, thereby ensuring that the protective sleeve 8 protects the screw head 2. At the same time, the silicone coating can further reduce the gap between the protective sleeve 8 and the screw head 2, making the screw head 2 less prone to rusting due to the moisture absorption of the wood and the humid environment.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-strength drill pilot screw characterized by, The utility model provides a screw post, a screw head (2) fixedly connected to the upper end of the screw post (1), and a protective sleeve (8) detachably connected to the outer side of the screw head (2), a cross slot (6) is formed on the side of the screw head (2) away from the screw post (1), and a silica gel coating is coated on the inner side of the protective sleeve (8), when the protective sleeve (8) is detachably connected to the screw head (2), the silica gel coating is clamped between the protective sleeve (8) and the screw head (2).

2. A high-strength drill point screw as defined in claim 1, wherein, A through slot (7) is formed on the screw head (2) at the outer circle of the cross slot (6), and the inner top surface of the protective sleeve (8) is fixedly connected with a thorn (9) that can penetrate through the through slot (7).

3. A high-strength drill point screw as defined in claim 2, wherein, The thorn (9) is in the shape of a quadrangular pyramid, and the inner wall of the through slot (7) is in close contact with the outer circle of the thorn (9).

4. A high-strength drill point screw as defined in claim 2, wherein, A plug hole (5) is formed at the end of the screw post (1) away from the screw head (2) and is in communication with the bottom of the cross slot (6), a plug post (4) is detachably connected in the plug hole (5), a drill bit (3) is fixedly connected to the end of the plug post (4) away from the screw head (2) and is coaxially arranged with the screw post (1), and the length of the plug post (4) is less than or equal to the depth of the plug hole (5).

5. A high-strength drill point screw as defined in claim 4, wherein, The screw post (1) and the screw head (2) are in an integral molding structure, and the plug post (4) and the drill bit (3) are in an integral molding structure.

6. A high-strength drill point screw as defined in claim 5, wherein, The screw post (1) and the screw head (2) are made of carbon steel or stainless steel, and the protective sleeve (8), the thorn (9), the plug post (4), and the drill bit (3) are made of hard alloy.

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