A self-tapping screw with lockable nut

Abstract

This utility model relates to the field of self-tapping screws with locking nuts, and discloses a self-tapping screw with locking nuts, comprising a screw rod: a nut is fixedly connected to the top of the screw rod, a threaded section is provided on the surface of the screw rod, a drill bit is provided at the bottom of the screw rod, and a nut body is slidably connected to the surface of the screw rod. A nylon insert ring is provided inside the nut body, and the outer wall of the nut body is provided with anti-slip texture. This self-tapping screw with locking nuts, by providing a nylon insert ring inside the nut body, when the nut body is screwed into the threaded section of the screw rod, the nylon insert ring is compressed and undergoes elastic deformation, thus tightly fitting onto the threaded section, effectively preventing the nut body from loosening under vibration or stress, improving the stability and reliability of the connection. At the same time, the anti-slip texture design on the outer wall of the nut body also increases the friction when the operator tightens or loosens the nut, making operation more convenient.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screws for drill tails, and in particular to a self-tapping screw for drill tails with a lockable nut. Background Technology

[0002] A self-drilling screw is a special type of fastener, named for its pointed tail structure resembling a drill bit. Its standard name is self-drilling screw, and it is also known in the industry as a dovetail screw.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: After the existing self-tapping screws are connected, the nut is prone to loosening due to the combined effects of various complex factors such as vibration in the external environment or the application of additional forces. Once this loosening occurs, it will directly lead to a serious weakening of the stability of the entire connection structure, which will significantly affect its normal use effect. In some cases, it may also pose a potential threat to the safety of the user, thereby greatly reducing the overall application performance and reliability. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing self-tapping screws for drill bit are prone to loosening of the nut after connection due to vibration or force, resulting in unstable connection and affecting the use effect and safety. To this end, we propose a self-tapping screw for drill bit with a lockable nut.

[0005] To achieve the above objectives, this application adopts the following technical solution: a self-tapping screw with a lockable nut, comprising a screw rod: a nut is fixedly connected to the top of the screw rod, a threaded section is provided on the surface of the screw rod, a drill bit is provided at the bottom of the screw rod, a nut body is slidably connected to the surface of the screw rod, a nylon insert ring is provided inside the nut body, and anti-slip texture is provided on the outer wall of the nut body.

[0006] Preferably, the inner diameter of the nylon insert ring is smaller than the nominal diameter of the threaded section.

[0007] Preferably, the cone surface of the drill bit has three to four helical cutting grooves evenly distributed.

[0008] Preferably, the thread profile of the threaded segment is a triangular tooth, the crest of the triangular tooth is rounded by 0.1 to 0.3 mm, and the pitch of the threaded segment is 1.2 to 2 mm.

[0009] Preferably, an annular plate is slidably connected to the surface of the screw, and the top of the annular plate abuts against the bottom of the nut.

[0010] Preferably, the top surface of the nut is provided with a cross groove.

[0011] Preferably, the outer diameter of the screw is smaller than the nominal diameter of the threaded section, and the surface of the screw is provided with an anti-rust coating, which is a zinc-nickel alloy coating.

[0012] The technical effects and advantages of this utility model are as follows: In this invention, a nylon insert ring is provided inside the nut body. When the nut body is screwed into the threaded section of the screw, the nylon insert ring is compressed and undergoes elastic deformation, thus tightly fitting onto the threaded section. This effectively prevents the nut body from loosening under vibration or stress, improving the stability and reliability of the connection. At the same time, the anti-slip texture design on the outer wall of the nut body also increases the friction force when the operator tightens or loosens the nut, making the operation more convenient. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the disassembled nut structure of this utility model; Figure 3 This is a schematic diagram of the disassembled screw structure of this utility model.

[0014] Legend: 1. Screw; 2. Nut; 3. Threaded section; 4. Drill bit; 5. Nut body; 6. Nylon insert ring; 7. Spiral cutting groove; 8. Annular plate; 9. Cross groove. Detailed Implementation

[0015] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0016] Reference Figure 1 - Figure 3 As shown, this utility model provides a technical solution: a self-tapping screw with a lockable nut, including a screw rod 1: a nut 2 is fixedly connected to the top of the screw rod 1, a threaded section 3 is provided on the surface of the screw rod 1, a drill bit 4 is provided at the bottom of the screw rod 1, a nut body 5 is slidably connected to the surface of the screw rod 1, a nylon insert ring 6 is provided inside the nut body 5, and an anti-slip texture is provided on the outer wall of the nut body 5. Specifically, by setting a nylon insert ring 6 inside the nut body 5, when the nut body 5 is screwed into the threaded section 3 of the screw 1, the nylon insert ring 6 will be squeezed and produce elastic deformation, thus tightly fitting onto the threaded section 3, effectively preventing the nut body 5 from loosening under vibration or stress, improving the stability and reliability of the connection. At the same time, the anti-slip texture design on the outer wall of the nut body 5 also increases the friction when the operator tightens or loosens the nut, making the operation more convenient.

[0017] Reference Figure 2 As shown in this embodiment: the inner diameter of the nylon insert ring 6 is smaller than the nominal diameter of the threaded section 3; Specifically: Since the inner diameter of the nylon insert ring 6 is smaller than the nominal diameter of the threaded section 3, when the nut body 5 is installed on the screw 1, the nylon insert ring 6 will be squeezed by the threaded section 3. This squeezing causes the nylon insert ring 6 to undergo elastic deformation, tightly wrapping the threaded section 3 and forming a strong frictional force. This effectively prevents the nut body 5 from loosening when subjected to vibration or external force, greatly improving the stability of the screw connection and ensuring safety and reliability during use.

[0018] Reference Figure 2 As shown in this embodiment: the cone surface of the drill bit 4 has three to four spiral cutting grooves 7 evenly distributed; Specifically: The design of these three to four spiral cutting grooves 7 is extremely ingenious. During the process of the drill bit 4 drilling into the material, the spiral cutting grooves 7 can effectively remove the chips generated during drilling. As the drill bit 4 rotates and drills in, the chips will be carried out along the spiral direction of the spiral cutting grooves 7, thus avoiding the accumulation of chips at the drill hole.

[0019] Reference Figure 2 As shown in this embodiment: the thread profile of thread segment 3 is triangular tooth, the tip of the triangular tooth is rounded by 0.1 to 0.3 mm, and the pitch of thread segment 3 is 1.2 to 2 mm; Specifically: This particular triangular tooth design, combined with a 0.1 to 0.3 mm rounding, has many advantages. The shape of the triangular tooth allows the thread to cut into the material better during screwing, enhancing the strength of the connection. The rounding of the tooth tip can reduce stress concentration on the thread when it is under force, reduce the risk of thread damage, and extend the service life of the screw.

[0020] Reference Figure 3 As shown in this embodiment: an annular plate 8 is slidably connected to the surface of the screw 1, and the top of the annular plate 8 abuts against the bottom of the nut 2; Specifically, the sliding connection between the annular plate 8 and the screw 1 allows the annular plate 8 to be flexibly adjusted in position according to actual needs during installation. When the nut 2 is tightened, the annular plate 8 is pressed tightly against the surface of the connecting parts, which plays a good role in preventing loosening and can effectively prevent the nut from loosening due to vibration and other reasons, greatly improving the stability and reliability of the connection.

[0021] Reference Figure 2 As shown in this embodiment: the top surface of the nut 2 is provided with a cross groove 9; Specifically: The design of the Phillips head 9 greatly facilitates the installation and removal of screws. Tightening or loosening can be easily performed using a common Phillips head screwdriver without the need for additional special tools. This not only improves work efficiency but also reduces tool costs. At the same time, the specifications of the Phillips head 9 are carefully designed to match the screwdriver well, effectively preventing slippage during operation and reducing damage to the surface of the nut 2.

[0022] Reference Figure 1 As shown in this embodiment: the outer diameter of the screw 1 is smaller than the nominal diameter of the threaded section 3, and the surface of the screw 1 is provided with an anti-rust coating, which is a zinc-nickel alloy coating; Specifically, the design of the outer diameter of screw 1 being smaller than the nominal diameter of thread section 3 allows screw 1 to enter the pre-drilled hole more smoothly when the screw is driven into the material, reducing resistance during the driving process, improving driving efficiency, and also reducing damage to the material. The zinc-nickel alloy anti-rust coating on the surface of screw 1 has good anti-rust performance, effectively isolating screw 1 from contact with the external environment, preventing screw 1 from rusting and corroding, thereby extending the service life of the screw and ensuring the long-term stability of the connection.

[0023] Working principle: By setting a nylon insert ring 6 inside the nut body 5, when the nut body 5 is screwed into the threaded section 3 of the screw 1, the nylon insert ring 6 will be squeezed and produce elastic deformation, thus tightly fitting onto the threaded section 3, effectively preventing the nut body 5 from loosening under vibration or force, improving the stability and reliability of the connection. At the same time, the anti-slip texture design on the outer wall of the nut body 5 also increases the friction force when the operator tightens or loosens the nut, making the operation more convenient.

[0024] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A self-tapping screw with a lockable nut, comprising a screw (1): characterized in that, The top of the screw (1) is fixedly connected to a nut (2), the surface of the screw (1) is provided with a threaded section (3), the bottom of the screw (1) is provided with a drill bit (4), the surface of the screw (1) is slidably connected to a nut body (5), the inside of the nut body (5) is provided with a nylon insert ring (6), and the outer wall of the nut body (5) is provided with anti-slip texture.

2. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The inner diameter of the nylon insert ring (6) is smaller than the nominal diameter of the threaded section (3).

3. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The drill bit (4) has three to four spiral cutting grooves (7) evenly distributed on its conical surface.

4. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The thread profile of the threaded segment (3) is a triangular tooth, and the tip of the triangular tooth is rounded by 0.1 to 0.3 mm. The pitch of the threaded segment (3) is 1.2 to 2 mm.

5. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The screw (1) is slidably connected to an annular plate (8), the top of which abuts against the bottom of the nut (2).

6. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The top surface of the nut (2) is provided with a cross groove (9).

7. The self-tapping screw with a lockable nut according to claim 1, characterized in that: The outer diameter of the screw (1) is smaller than the nominal diameter of the threaded section (3), and the surface of the screw (1) is provided with an anti-rust coating, which is a zinc-nickel alloy coating.

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