A self-tapping screw that can be truncated

Abstract

The utility model discloses a kind of self-tapping screws that can be truncated, is related to self-tapping screw technical field, including outer screw, inner screw is coaxially arranged in outer screw inside;The screw cap threadedly connected with inner screw is located one end of outer screw;The outer screw includes outer rod, the outer rod outside even multiple thread one, multiple outer truncation grooves are evenly arranged on outer rod, multiple outer truncation grooves and multiple thread one are staggered distribution;One end of outer rod is integrally provided with connecting cap one, the middle side of the connecting cap one away from outer rod is provided with the installation groove for placing screw cap;Outer rod inside is coaxially provided with through-hole;By the structure that outer screw and inner screw can be truncated are set, can be according to the demand of different specifications automobile accessory, flexible intercept corresponding length outer screw and inner screw, when installing automobile central control panel, interior decoration panel, seat accessory etc., according to the thickness difference of different vehicle interior structure and refitting component, the length of screw is conveniently adjusted, the application range of self-tapping screw is improved.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically a cut-off self-tapping screw. Background Technology

[0002] Self-tapping screws are fasteners that do not require pre-drilling and can directly tap the material to form threads. The threads of self-tapping screws are sharp and have a wide pitch, which can cut internal threads when drilling into the material, achieving self-tapping and self-tightening.

[0003] Chinese Patent Publication No. CN 201037494 Y discloses an anti-loosening self-tapping screw that can prevent itself from reversing and loosening. It includes a screw head, a screw shank, and a tail tip. An anti-loosening structure is provided on the bottom surface of the screw head at the root of the screw shank. This anti-loosening structure consists of stepped protrusions radiating outwards from the screw shank, or it can be a rack-like protrusion. The anti-loosening structure of a flanged self-tapping screw is provided on the bottom surface of the flange at the root of the screw shank. After the self-tapping screws are tightened, the anti-loosening structure increases the frictional resistance between the screws and the target object, preventing the screws from loosening. However, when applied to the installation of automotive parts, especially when installing and fixing components such as the center console, interior trim panels, and seat accessories, the required screw length varies due to differences in the interior structure and thickness of modified parts in different car models. Since the length of the self-tapping screws is fixed, they can only be used with automotive parts that match the length of the screws, thus limiting their applicability. Summary of the Invention

[0004] The purpose of this invention is to provide a cut-off self-tapping screw, in which both the external and internal screws are designed to be cut off, allowing for the cutting of external and internal screws to the appropriate length according to different specifications of automotive parts, thereby solving the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A cut-off self-tapping screw, including External screw, the cut-off external screw has an internal screw coaxially arranged inside; The nut, which is connected to the internal screw thread, is located at one end of the external screw; The external screw includes an outer rod with multiple threads evenly distributed on its outer side and multiple external cut-off grooves evenly distributed on the outer rod, with the multiple external cut-off grooves and multiple threads being staggered. One end of the outer rod is integrally provided with a connecting cap. The middle of the side of the connecting cap away from the outer rod is provided with a mounting groove for placing a nut. The outer rod is provided with a through hole coaxially inside, which passes through the outer rod and the connecting cap. The inner screw includes an inner rod, on the outer side of which are evenly provided multiple threads II. The inner rod is evenly provided with multiple inner cut-off grooves, and the multiple inner cut-off grooves and multiple threads II are staggered. The end of the inner rod near the connecting cap I is threadedly connected to the nut. The end of the inner rod away from the nut is integrally provided with a connecting cap II. The connecting cap II is provided with an internal hexagonal groove in the middle of the side away from the inner rod.

[0006] As a further technical solution of this utility model, all of the aforementioned outer cut-off grooves are annular in shape, and all of the outer cut-off grooves are coaxially arranged with the outer rod; the inner diameter of the multiple outer cut-off grooves is larger than the diameter of the through hole.

[0007] As a further technical solution of this utility model, the shape of the mounting groove is the same as that of the nut, and the nut has a threaded hole in the middle for connection with the threaded thread.

[0008] As a further technical solution of this utility model, the length of the inner rod is the same as the sum of the lengths of the outer rod and the connecting cap, and the inner rod is located in the through hole, the diameter of which is larger than the diameter of the inner rod.

[0009] As a further technical solution of this utility model, the connecting cap is provided with a plurality of anti-slip textures evenly distributed on the side near the outer cut-off groove.

[0010] As a further technical solution of this utility model, all of the aforementioned inner cutting grooves are annular in shape, and all of the inner cutting grooves are coaxially arranged with the inner rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features a cut-off structure for both the external and internal screws, allowing for flexible cutting of external and internal screws to the appropriate lengths to meet the needs of different automotive parts. When installing components such as automotive center console panels, interior trim panels, and seat accessories, the screw length can be easily adjusted according to the thickness differences of interior structures and modified parts in different car models, greatly expanding the applicability of self-tapping screws. The design of the external and internal cutting grooves makes the cutting operation easier and more precise, ensuring that the cut screw still maintains good connection performance.

[0012] In this invention, the anti-slip texture increases the friction between the connecting cap and the surface of the automotive parts, thereby preventing the outer screw from loosening. At the same time, the inner rod is located in the through hole, and the diameter of the through hole is larger than the diameter of the inner rod, ensuring the flexibility and stability of the inner screw during installation and use, so that the entire self-tapping screw can play a good fastening role in different scenarios.

[0013] In this invention, the inner rod is threadedly connected to the nut via the second thread, allowing the second connecting cap and the first connecting cap to engage and clamp the automotive parts that need to be fixed, thereby improving the stability of the automotive parts after installation. In addition, the tightened inner rod can further increase the adhesion between the first connecting cap and the surface of the automotive parts, thereby improving the stability of the outer screw and preventing it from loosening. Furthermore, the mounting groove has the same shape as the nut, which allows the first connecting cap to prevent the nut from loosening, thus preventing the inner screw from loosening. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This utility model Figure 1 Top view.

[0016] Figure 3 This utility model Figure 2 AA sectional view.

[0017] Figure 4 This is a three-dimensional structural diagram of the external screw of this utility model.

[0018] Figure 5 This utility model Figure 4 The main view.

[0019] Figure 6 This utility model Figure 5 AA sectional view.

[0020] Figure 7 This is a three-dimensional structural diagram of the internal screw of this utility model.

[0021] Figure 8 This is a three-dimensional structural diagram of the nut of this utility model.

[0022] In the diagram: 1-external screw, 2-internal screw, 3-nut; 11-Outer rod, 12-Thread 1, 13-Outer cut-off groove, 14-Connecting cap 1, 15-Mounting groove, 16-Through hole, 17-Anti-slip texture, 21-Inner rod, 22-Inner cut-off groove, 23-Connecting cap 2, 24-Thread 2, 25-Internal hexagonal groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-8 In this embodiment of the utility model, a severable self-tapping screw includes... External screw 1, which can be cut off, has an internal screw 2 coaxially arranged inside; Nut 3, which is threaded to the internal screw 2, is located at one end of the external screw 1; The external screw 1 includes an external rod 11, on which a plurality of threads 12 are evenly distributed on the outer side. A plurality of external cut-off grooves 13 are evenly distributed on the external rod 11, and the plurality of external cut-off grooves 13 and the plurality of threads 12 are staggered. One end of the outer rod 11 is integrally provided with a connecting cap 14. The middle of the side of the connecting cap 14 away from the outer rod 11 is provided with a mounting groove 15 for placing the nut 3. The outer rod 11 is coaxially provided with a through hole 16, which passes through the outer rod 11 and the connecting cap 14. The inner screw 2 includes an inner rod 21, on the outer side of which a plurality of threads 24 are evenly provided. The inner rod 21 is also evenly provided with a plurality of inner cut-off grooves 22, and the plurality of inner cut-off grooves 22 and the plurality of threads 24 are staggered. The end of the inner rod 21 near the connecting cap 14 is threadedly connected to the nut 3. The end of the inner rod 21 away from the nut 3 is integrally provided with a connecting cap 23, and the middle of the side of the connecting cap 23 away from the inner rod 21 is provided with an internal hexagonal groove 25.

[0025] By adopting the above technical solution, and by setting cut-off structures for both the outer screw 1 and the inner screw 2, the corresponding lengths of the outer screw 1 and the inner screw 2 can be flexibly cut according to the needs of different specifications of automotive parts. When installing automotive center console panels, interior trim panels, seat accessories and other components, the screw length can be easily adjusted according to the differences in the interior structure and thickness of modified parts of different models, which greatly improves the applicability of self-tapping screws. The design of the outer cut-off groove 13 and the inner cut-off groove 22 makes the cutting operation easier and more precise, ensuring that the cut screw can still maintain good connection performance.

[0026] In this embodiment, all of the aforementioned outer cut-off grooves 13 are annular, and all of the outer cut-off grooves 13 are coaxially arranged with the outer rod 11; the inner diameter of the multiple outer cut-off grooves 13 is larger than the diameter of the through hole 16. The mounting groove 15 has the same shape as the nut 3, and the nut 3 has a threaded hole in the middle for threaded connection with thread 24.

[0027] By adopting the above technical solution, the anti-slip texture 17 increases the friction between the connecting cap 14 and the surface of the automotive parts, thereby preventing the outer screw 1 from loosening. At the same time, the inner rod 21 is located in the through hole 16 and the diameter of the through hole 16 is larger than the diameter of the inner rod 21, ensuring the flexibility and stability of the inner screw 2 during installation and use, so that the entire self-tapping screw can play a good fastening role in different scenarios.

[0028] In this embodiment, the length of the inner rod 21 is the same as the sum of the lengths of the outer rod 11 and the connecting cap 14. The inner rod 21 is located in the through hole 16, and the diameter of the through hole 16 is larger than the diameter of the inner rod 21. The connecting cap 14 is provided with a plurality of anti-slip textures 17 evenly distributed on the side near the outer cut-off groove 13, covering the side of the connecting cap 14. All of the aforementioned inner cut-off grooves 22 are annular in shape, and all of the inner cut-off grooves 22 are coaxially arranged with the inner rod 21.

[0029] By adopting the above technical solution, after the inner rod 21 is threadedly connected to the nut 3 through the second thread 24, the second connecting cap 23 and the first connecting cap 14 can clamp the automotive parts that need to be fixed, which can improve the stability of the automotive parts after installation. In addition, the tightened inner rod 21 can further improve the adhesion between the first connecting cap 14 and the surface of the automotive parts, thereby improving the stability of the outer screw 1 and preventing the outer screw 1 from loosening. Moreover, the mounting groove 15 has the same shape as the nut 3, so that the first connecting cap 14 can prevent the nut 3 from loosening, thereby preventing the inner screw 2 from loosening.

[0030] The working principle of this utility model is as follows: By setting a cut-off structure for both the outer screw 1 and the inner screw 2, the corresponding length of the outer screw 1 and the inner screw 2 can be flexibly cut according to the needs of different specifications of automotive parts. When installing automotive center console panels, interior trim panels, seat accessories and other parts, the screw length can be easily adjusted according to the thickness differences of the interior structure and modified parts of different models, which greatly improves the applicability of self-tapping screws; the design of the outer cut-off groove 13 and the inner cut-off groove 22 makes the cutting operation easier and more precise, ensuring that the cut screw can still maintain good connection performance. The anti-slip texture 17 increases the friction between the connecting cap 14 and the surface of the automotive parts, thereby preventing the outer screw 1 from loosening. At the same time, the inner rod 21 is located in the through hole 16 and the diameter of the through hole 16 is larger than the diameter of the inner rod 21, ensuring the flexibility and stability of the inner screw 2 during installation and use, so that the entire self-tapping screw can play a good fastening role in different scenarios. After the inner rod 21 is threaded to the nut 3 via the second thread 24, the second connecting nut 23 and the first connecting nut 14 can clamp the automotive parts that need to be fixed, which can improve the stability of the automotive parts after installation. In addition, the tightened inner rod 21 can further improve the adhesion between the first connecting nut 14 and the surface of the automotive parts, thereby improving the stability of the outer screw 1 and preventing the outer screw 1 from loosening. Moreover, the mounting groove 15 has the same shape as the nut 3, so the first connecting nut 14 can prevent the nut 3 from loosening, thereby preventing the inner screw 2 from loosening.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cut-off self-tapping screw, characterized in that: include External screw (1), the cut-off external screw (1) has an internal screw (2) coaxially arranged inside; Nut (3), which is threaded to the internal screw (2), is located at one end of the external screw (1); The external screw (1) includes an external rod (11), which has a plurality of threads (12) evenly distributed on its outer side. The external rod (11) is provided with a plurality of external cut-off grooves (13) evenly distributed, and the plurality of external cut-off grooves (13) and the plurality of threads (12) are staggered. One end of the outer rod (11) is integrally provided with a connecting cap (14), and the middle of the side of the connecting cap (14) away from the outer rod (11) is provided with an installation groove (15) for placing a nut (3); the outer rod (11) is provided with a through hole (16) coaxially inside, and the through hole (16) passes through the outer rod (11) and the connecting cap (14). The inner screw (2) includes an inner rod (21), on which a plurality of threads (24) are evenly provided on the outer side. A plurality of inner cut-off grooves (22) are evenly provided on the inner rod (21), and the plurality of inner cut-off grooves (22) and the plurality of threads (24) are staggered. The end of the inner rod (21) near the connecting cap (14) is threadedly connected to the nut (3). The end of the inner rod (21) away from the nut (3) is integrally provided with a connecting cap (23). The connecting cap (23) is provided with an internal hexagonal groove (25) in the middle of the side away from the inner rod (21).

2. The severable self-tapping screw according to claim 1, characterized in that: The multiple outer cut-off grooves (13) are all annular, and the multiple outer cut-off grooves (13) are all coaxially arranged with the outer rod (11); the inner diameter of the multiple outer cut-off grooves (13) is larger than the diameter of the through hole (16).

3. The severable self-tapping screw according to claim 1, characterized in that: The shape of the mounting groove (15) is the same as that of the nut (3), and the nut (3) has a threaded hole in the middle for threaded connection with thread two (24).

4. The severable self-tapping screw according to claim 1, characterized in that: The length of the inner rod (21) is the same as the sum of the lengths of the outer rod (11) and the connecting cap (14). The inner rod (21) is located in the through hole (16), the diameter of which is greater than the diameter of the inner rod (21).

5. The severable self-tapping screw according to claim 1, characterized in that: The connecting cap (14) is provided with a plurality of anti-slip textures (17) uniformly distributed on the side near the outer cut-off groove (13) covering the side of the connecting cap (14).

6. The severable self-tapping screw according to claim 1, characterized in that: The multiple inner cut-off grooves (22) are all annular, and the multiple inner cut-off grooves (22) are all coaxially arranged with the inner rod (21).

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