Quick self-drilling and self-tapping chipless stop screw

Abstract

The utility model provides a quick self-drilling and self-tapping chipless stop screw which comprises a head part and a screw rod, and the screw rod is arranged at the bottom of the head part; anti-skid teeth are arranged at the bottom of the head; the included angle between the bottom face of the head and the center line of the screw is a negative inclination angle. The anti-slip teeth and the negative inclination angle are arranged on the head portion of the self-tapping anti-loosening screw, and the anti-slip teeth have the functions of preventing loosening and resisting rotation. The negative inclination angle can increase the contact surface and enhance the anti-loosening capability. The screw rod is provided with positioning preheating, hot melting penetrating, taper hole forming, self-tapping threads and locking threads in a segmented mode, and the stability and the connection strength of the stop screw can be improved. A triangular section is adopted in the positioning preheating section, the hot melting penetrating section and the taper hole forming section, friction resistance is reduced, threads are formed on materials through the self-extrusion technology, the materials are fastened through check screws, metal fibers are prevented from being cut off, and the assembly quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening screws, in particular to a quick self-drilling and self-tapping non-chip anti-loosening screw. Background Art

[0002] In the current rapidly developing new energy vehicle industry, self-drilling and self-tapping screws have been widely used and recognized in vehicle body connection due to their unique self-drilling and self-tapping functions. Such screws can directly rotate and drill into metals or other materials without the aid of additional drilling tools, greatly simplifying the assembly process and improving production efficiency. However, in the actual application process, especially when the vehicle is running at high speed, traditional self-drilling and self-tapping screws show insufficient stability when bearing vibration and torque. This instability often leads to loosening of the screws during long-term use, which not only causes noise and vibration fracture, but may even pose a threat to the driving safety of new energy vehicles. Content of the Utility Model

[0003] The utility model aims to at least solve the technical problem that screws may become loose during long-term use in the prior art, and particularly innovatively provides a quick self-drilling and self-tapping non-chip anti-loosening screw.

[0004] To achieve the above object of the utility model, the utility model provides a quick self-drilling and self-tapping non-chip anti-loosening screw, the screw includes a head and a screw rod, and the screw rod is arranged at the bottom of the head; anti-slip teeth are arranged at the bottom of the head.

[0005] As an optional embodiment of the utility model, optionally, the included angle between the bottom surface of the head and the center line of the screw rod is less than 90 degrees.

[0006] As an optional embodiment of the utility model, optionally, a hot-melt penetration section and a positioning preheating section are sequentially arranged at the bottom of the screw rod; one end of the hot-melt penetration section is connected to the screw rod, and the other end is connected to one end of the positioning preheating section.

[0007] As an optional embodiment of the utility model, optionally, the cross-sections of both the hot-melt penetration section and the positioning preheating section are triangular.

[0008] As an optional embodiment of the utility model, optionally, the hot-melt penetration section and the positioning preheating section are integrally formed.

[0009] As an optional embodiment of the utility model, optionally, a concave bearing area is further arranged at the bottom of the head.

[0010] As an optional embodiment of the utility model, optionally, a protrusion is arranged at the top of the head.

[0011] As an alternative embodiment of the present utility model, optionally, the protrusion is in the shape of a plum blossom.

[0012] As an alternative embodiment of the present utility model, optionally, the protrusion is integrally formed with the head.

[0013] As an alternative embodiment of the present utility model, optionally, the head and the screw rod are integrally formed.

[0014] The beneficial effects of the present utility model are as follows. Through the design of setting anti-slip teeth at the bottom of the head of the anti-loosening screw and making the included angle between the center line of the screw rod and the anti-slip teeth less than 90 degrees, the screw rod can better fit the surface of the material during the screwing process, enhancing the anti-loosening ability of the screw rod. At the same time, the setting of the hot-melt penetration section and the positioning preheating section enables the screw rod to quickly penetrate and be fixed in the material when screwing in, further improving the stability and connection strength of the screw rod. In particular, the hot-melt penetration section and the positioning preheating section adopt a triangular shape, which not only enhances their penetration ability but also effectively reduces the cutting of metal materials, improving the assembly quality.

[0015] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0017] Figure 1 is a schematic structural view of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0018] Figure 2 is a schematic structural view of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0019] Figure 3 is a bottom view of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0020] Figure 4 is a partial schematic structural view of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0021] Figure 5 is a top view of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0022] Figure 6 is a cross-sectional view after the installation of the quick self-drilling self-defending anti-loosening screw of the present utility model.

[0023] In the figures, 1. Head, 2. Screw rod, 3. Anti-slip teeth, 4. Hot-melt penetration section, 5. Positioning preheating section, 6. Concave bearing area, 7. Protrusion. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0025] A quick self-drilling and self-tapping non-chip loosening prevention screw, the screw comprising a head 1 and a screw rod 2, the screw rod 2 being disposed at the bottom of the head 1; an anti-slip tooth 3 is provided at the bottom of the head 1.

[0026] As Figure 1 and 2 shown, in this embodiment, the anti-slip tooth 3 is opened at the bottom of the head 1. During use, the anti-slip tooth 3 can closely adhere to the material surface to form effective frictional force, thereby preventing the screw from loosening due to vibration or torque during long-term use. At the same time, the angle between the bottom surface of the head 1 and the center line of the screw rod 2 is designed to be less than 90 degrees. Such a design enables the screw to cut into the material more smoothly during the screwing process, reduces resistance, and improves the assembly efficiency. In this embodiment, the anti-slip tooth 3 effectively prevents the screw from loosening, and due to the anti-slip tooth 3 at the bottom of the head 1, it has better anti-rotation performance; the anti-slip tooth 3 can also better transmit the locking torque during use and reduce the friction during self-drilling.

[0027] In this embodiment, by providing the anti-slip tooth 3 at the bottom of the head 1 of the screw and the design with the bottom angle less than 90 degrees, the screw rod 2 can better adhere to the material surface during the screwing process, enhancing the anti-loosening ability of the screw. At the same time, the setting of the hot-melt penetration section and the positioning preheating section enables the screw rod 2 to quickly penetrate and be fixed in the material when screwed in, further improving the stability and connection strength of the screw rod 2. In particular, the hot-melt penetration section 4 and the positioning preheating section 5 adopt a triangular shape, which not only enhances their penetration ability but also effectively reduces material damage and improves the assembly quality.

[0028] As an alternative embodiment of the present utility model, optionally, the included angle between the bottom surface of the head 1 and the center line of the screw rod 2 is less than 90 degrees.

[0029] As Figure 4As shown in the figure, in this embodiment, the bottom surface of the head 1 is designed as a slightly inclined curved surface, such that the angle between the bottom surface and the central axis of the screw 2 is less than 90 degrees (negative inclination angle), which helps to better fit the material surface during the screwing-in process of the screw 2. Especially in the connection of new energy vehicle bodies, this design can significantly improve the anti-loosening ability of the screw 2 and reduce the loosening phenomenon caused by vibration and torque. Adding a negative inclination angle to the bottom surface of the head 1 can effectively reduce the loosening of the anti-loosening screw in this embodiment and improve the stability and reliability of the connection; the negative inclination angle can increase the contact surface between the anti-loosening screw and the plate, improving the bearing capacity and tensile strength of the anti-loosening screw structure in this embodiment.

[0030] As an alternative embodiment of the present utility model, optionally, a tapered hole forming section, a hot melt penetration section 4, and a positioning preheating section 5 are sequentially provided at the bottom of the screw 2; one end of the tapered hole forming section is connected to one end of the hot melt penetration section 4, the other end of the tapered hole forming section is connected to the screw 2, the other end of the hot melt penetration section 4 is connected to one end of the positioning preheating section 5, and the other end of the positioning preheating section 5 is placed on the plate during use for positioning and preheating the plate.

[0031] As Figure 1 and 4 shown in the figure, during use, first, the material is preheated through the positioning preheating section 5 to reduce the hardness of the material, and then the hot melt penetration section 4 quickly penetrates the material to achieve rapid fixation of the anti-loosening screw. By means of the hot melt penetration section 4 and the positioning preheating section 5, the resistance and material damage during the screwing-in process of the screw 2 can be significantly reduced, improving the assembly efficiency and quality.

[0032] As an alternative embodiment of the present utility model, optionally, the cross-section of the hot melt penetration section 4 and the cross-section of the positioning preheating section 5 are both triangular.

[0033] As Figure 3 shown in the figure, by designing the hot melt penetration section 4 and the positioning preheating section 5 as triangular shapes, they can penetrate the material more stably during use. And due to the special shape of the triangle, the contact area with the material can be reduced during the penetration process, thereby reducing the penetration resistance and material damage. In addition, the triangular design can also form a certain self-locking effect during the penetration process, further enhancing the stability and anti-loosening ability of the anti-loosening screw.

[0034] As an alternative embodiment of the present utility model, optionally, the hot melt penetration section 4 and the positioning preheating section 5 are integrally formed.

[0035] As Figure 3 shown in the figure, the integral formation of the hot melt penetration section 4 and the positioning preheating section 5 can increase their structural strength, ensuring that they are not easily broken or deformed during the penetration and positioning processes. In addition, the integral formation design also simplifies the production process and reduces the production cost.

[0036] As an alternative embodiment of the present utility model, optionally, a concave bearing area 6 is further provided at the bottom of the head 1.

[0037] As Figure 1 , 3 and as shown in 4, the concave bearing area 6 is a circular groove opened on the inner side of the head 1 and is close to the anti-slip teeth 3. By using the concave bearing area 6, the material debris generated during the screwing-in process of the screw 2 can be collected and accommodated, preventing these debris from interfering with the assembly process or affecting the assembly quality.

[0038] As an alternative embodiment of the present utility model, optionally, a protrusion 7 is provided at the top of the head 1.

[0039] As Figure 2 , 5 and as shown in 6, during use, the protrusion 7 cooperates with the assembly tool, facilitating the user to screw in or out the anti-loosening screw. Especially in some narrow or difficult-to-reach assembly spaces, the design of the protrusion 7 can significantly improve the convenience and efficiency of assembly.

[0040] As an alternative embodiment of the present utility model, optionally, the protrusion 7 is in the shape of a plum blossom, but is not limited to the plum blossom shape.

[0041] As Figure 2 and 5 shown, the plum blossom-shaped protrusion 7 has a certain anti-slip effect. Even in a wet or oily working environment, it can ensure that the assembler can use it to increase the friction between the assembly tool, making the anti-loosening screw more stable during the screwing-in process and reducing assembly problems caused by sliding. Especially in occasions where precise control of torque and screwing-in depth is required, the presence of the protrusion can significantly improve the accuracy and efficiency of assembly.

[0042] As an alternative embodiment of the present utility model, optionally, the protrusion 7 is integrally formed with the head 1.

[0043] As Figure 2 and 5 shown, the integral formation of the protrusion 7 and the head 1 can increase its structural strength, reducing deformation, fracture or damage caused by external forces during use. At the same time, the integral formation design also simplifies the production process, reduces production costs, and improves production efficiency.

[0044] As an alternative embodiment of the present utility model, optionally, the head 1 and the screw 2 are integrally formed.

[0045] As Figure 1As shown, the integrally formed design of the head 1 and the screw 2 makes the entire anti-loosening screw structure more compact, reducing the risk of loosening and falling off that may occur during the assembly process. In addition, the integrally formed design also improves the overall strength of the anti-loosening screw, making it more durable and capable of adapting to various complex working environments. At the same time, this design also simplifies the production process and reduces the production cost, further enhancing the competitiveness of the quick self-drilling and self-tapping anti-loosening screw in the market.

[0046] In addition, in order to further optimize the performance of the anti-loosening screw, this embodiment can also make special selections for the materials of the hot melt penetration section 4 and the positioning preheating section 5. For example, selecting materials with high thermal conductivity and high melting point can more quickly reduce the material hardness during the preheating stage, while maintaining sufficient strength and stability during the penetration stage. Such material selection can further improve the assembly efficiency and anti-loosening ability of the anti-loosening screw.

[0047] Furthermore, this embodiment can also add a special coating on the surface of the anti-loosening screw to increase the friction force and corrosion resistance between it and the material. This coating can be selected according to specific application scenarios. For example, anti-loosening screws used in humid or corrosive environments can choose coatings with excellent corrosion resistance to improve their service life and stability.

[0048] In summary, the quick self-drilling and self-tapping anti-loosening screw of this embodiment achieves a quick, stable, and anti-loosening assembly effect through a series of design optimizations and the selection of special materials. At the same time, its compact structure, high strength, and corrosion resistance also enable it to exhibit excellent performance in various complex working environments.

[0049] The installation process of the quick self-drilling and self-tapping anti-loosening screw of this embodiment is as follows:

[0050] Step 1, positioning preheating: First, gently contact the anti-loosening screw with the surface of the plate at a low rotational speed and low pressure for preheating treatment;

[0051] Step 2, hot melt penetration: Subsequently, by increasing the rotational speed of the anti-loosening screw and applying greater pressure, plastic deformation is generated in the plate under strong thermal effects to achieve hot melt penetration;

[0052] Step 3, conical hole forming: Next, the anti-loosening screw precisely drills a cylindrical through-hole in the plate, that is, conical hole forming;

[0053] Step 4, thread forming: After the plate is broken through by the connecting anti-loosening screw, reduce the rotational speed and pressure so that the anti-loosening screw can smoothly form a stable thread structure in the hole;

[0054] Step 5, screwing in the anti-loosening screw: Then, screw the anti-loosening screw smoothly into the formed threaded hole at a low rotational speed and low pressure;

[0055] Step 6, fastening and seating: Finally, after the sheet material has cooled, it is tightly meshed with the lock screw to form a firm connection that is both airtight and watertight.

[0056] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A fast self-drilling and self-tapping non-chip loosening prevention screw, the screw comprising a head (1) and a screw rod (2), the screw rod (2) being disposed at the bottom of the head (1); characterized in that, The bottom of the head (1) is provided with anti-slip teeth (3).

2. The quick self-drilling and self-tapping non-chip anti-loosening screw according to claim 1, wherein The angle between the bottom surface of the head (1) and the center line of the screw rod (2) is less than 90 degrees.

3. A fast self-drilling and self-tapping non-chip anti-loosening screw according to claim 1, characterized in that, The bottom of the screw rod (2) is successively provided with a hot melt penetration section (4) and a positioning preheating section (5); one end of the hot melt penetration section (4) is connected to the screw rod (2), and the other end is connected to one end of the positioning preheating section (5).

4. The quick self-drilling and self-tapping non-chip anti-loosening screw according to claim 3, wherein, The cross-sections of both the hot melt penetration section (4) and the positioning preheating section (5) are triangular.

5. A kind of fast self-drilling and self-tapping non-chip loosening prevention screw according to claim 3 or 4, characterized in that, The hot melt penetration section (4) and the positioning preheating section (5) are integrally formed.

6. The quick self-drilling and self-tapping non-chip loosening prevention screw according to claim 1, characterized in that, The bottom of the head (1) is further provided with a concave bearing area (6).

7. A quick self-drilling and self-tapping non-chip anti-loosening screw according to claim 1 or 2 or 6, characterized in that, The top of the head (1) is provided with a protrusion (7).

8. The quick self-drilling and self-tapping non-chip anti-loosening screw according to claim 7, wherein The protrusion (7) is in the shape of a plum blossom.

9. The quick self-drilling and self-tapping non-chip loosening prevention screw according to claim 7, wherein The protrusion (7) and the head (1) are integrally formed.

10. A fast self-drilling and self-tapping non-chip loosening prevention screw according to claim 1, characterized in that, The head (1) and the screw rod (2) are integrally formed.

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