A self-tapping chip removing nut

Abstract

The utility model discloses a self -tapping chip removal nut, including nut body, thread hole, chip removal groove and screw thread, the centre of nut body is provided with thread hole, is provided with chip removal groove on the hole wall of thread hole, still have screw thread on the hole wall of thread hole, the quantity of chip removal groove has two, two relative settings of chip removal groove, one end of chip removal groove is flush with the end face of nut body, the other end of chip removal groove extends to the inner center of nut body, the lateral wall of chip removal groove is arc structure, and the lateral wall of chip removal groove and the hole wall of thread hole are smooth transition connection, the screw thread is helical and is distributed on the hole wall of thread hole, and the surface of screw thread is sharp structure, the outer wall of nut body is fixedly installed with six protection flange, the utility model discloses can be to the installation component and is attacked and is fastened, not only has improved assembly efficiency, and the chip removal is smooth, and the quality of the thread formed is high.

Description

Technical Field

[0001] This utility model relates to the technical field of fasteners, and in particular to the technical field of a self-tapping chip-removing nut. Background Technology

[0002] A nut is a fastener that is screwed onto a bolt or threaded rod to secure a fastener. It is an essential component in all manufacturing machinery. Based on the material, nuts are classified into several categories, including carbon steel, stainless steel, and non-ferrous metals.

[0003] After installation, there is usually a gap between the nut and the mounting part. When the external impact force is greater than the friction force generated between the threads, the mounting part and the nut are prone to loosening.

[0004] To address the problems mentioned above, for example, application number CN201420873975.0 discloses a nut that is a hexagonal prism with an internally threaded through hole. One end face has a cylindrical boss and an annular arc-shaped boss that mate with a threaded hole in a mechanical component. The annular arc-shaped boss is tangent to the hexagonal prism and has a height of 2mm. The other end face has a 2mm wide groove. The bottom surface of the groove is flat and has the same axial length as the end face of the annular arc-shaped boss. The groove and the annular arc-shaped boss increase the friction between the threads under tightening force, thus achieving an anti-loosening effect. The cylindrical boss not only increases the shearing force of the threads but also has a positioning function, preventing misalignment during bolt installation.

[0005] However, the above-mentioned nuts have limited protective properties during use and cannot effectively improve the wear resistance of the nut body. As a result, the surface of the nut body is easily damaged, which in turn leads to corrosion of the nut body and affects disassembly and assembly.

[0006] To address the problems mentioned above, for example, application number CN202123057745.6 discloses a corrosion-resistant nut, including a nut body, a raised strip fixedly connected to the outer side of the nut body, and threads provided inside the nut body. The nut body includes a waterproof layer and a wear-resistant layer. A first corrosion-resistant layer is provided on the side of the waterproof layer facing the threads, and a second corrosion-resistant layer is provided on the side of the wear-resistant layer facing the threads. The waterproof layer can effectively remove water from the nut body in rainy weather, thereby reducing the possibility of corrosion of the nut body. The wear-resistant layer can prevent the nut body from being damaged by compression. At the same time, the first and second corrosion-resistant layers can further protect the nut body.

[0007] However, the above structure still has the following drawbacks: Although the aforementioned nuts improve corrosion resistance, in practical applications, there are often situations where fastening is required on smooth cylindrical objects made of materials such as soft metals or nylon. However, these nuts do not have additional threads or chip removal grooves. This means that when encountering smooth cylindrical objects made of soft metals or nylon, workers need to pre-machine the threads using tools such as taps, and then screw in a regular nut for fastening. This method is cumbersome, increases assembly time and labor costs, and generates debris after threading. If this debris remains on the threaded mating surface, it will seriously affect the thread engagement quality, leading to inaccurate tightening torque, loose connections, and even accelerated thread wear, posing safety hazards. Summary of the Invention

[0008] The purpose of this invention is to solve the problems in the prior art by proposing a self-tapping chip-removing nut that can tap and fasten the installed parts, which not only improves the assembly efficiency but also ensures smooth chip removal and high-quality threads.

[0009] To achieve the above objectives, this utility model proposes a self-tapping chip-removing nut, comprising a nut body, a threaded hole, a chip-removing groove, and threaded teeth; the nut body has a threaded hole at its center, the threaded hole has a chip-removing groove on its wall, and the threaded hole also has threaded teeth distributed on its wall.

[0010] Preferably, there are two chip removal grooves, which are arranged opposite to each other. One end of each chip removal groove is flush with the end face of the nut body, and the other end of each chip removal groove extends toward the inner center of the nut body.

[0011] Preferably, the sidewall of the chip removal groove has an arc-shaped structure, and the sidewall of the chip removal groove is smoothly connected to the wall of the threaded hole.

[0012] Preferably, the threads are spirally distributed on the wall of the threaded hole, and the surface of the threads has a pointed structure.

[0013] Preferably, the outer wall of the nut body is fixedly equipped with six protective flanges, which are evenly distributed on the six sharp corners of the outer wall of the nut body, and the upper and lower end faces of the protective flanges are parallel to the upper and lower end faces of the nut body.

[0014] Preferably, the protective flange is circular, and the outer wall of the protective flange is provided with anti-slip texture in a wavy shape.

[0015] Preferably, a protective reinforcing rib is fixedly installed between the nut body and the protective flange, and the upper and lower end faces of the protective reinforcing rib are parallel to the upper and lower end faces of the nut body.

[0016] The beneficial effects of this utility model are: 1. By adding threads, this utility model completely eliminates the tedious process of tapping before fastening on soft, smooth cylinders, greatly shortening assembly time and saving additional labor and tool costs. 2. By adding a chip removal groove, this utility model can continuously remove the cutting chips generated during the screwing of the nut, thereby effectively preventing chips from remaining on the thread surface, ensuring complete meshing between the internal and external threads, thus ensuring accurate tightening torque and connection strength, and avoiding safety hazards such as loose connection and accelerated wear caused by chips. Attached Figure Description

[0017] Figure 1 This is a front view of a self-tapping screw chip removal nut according to this utility model; Figure 2 This is an enlarged schematic diagram of the thread of a self-tapping chip-removing nut according to this utility model; Figure 3 This is a schematic diagram of the protective flange of a self-tapping screw chip removal nut according to this utility model; Figure 4 This is a cross-sectional view of a self-tapping chip-removing nut according to this utility model; In the diagram: 1-nut body, 2-threaded hole, 3-chip removal groove, 4-thread thread, 5-protective flange, 501-anti-slip texture, 6-protective reinforcing rib. Detailed Implementation

[0018] Example 1 See Figure 1 This utility model discloses a self-tapping chip-removing nut, comprising a nut body 1, a threaded hole 2, a chip removal groove 3, and threaded teeth 4. The nut body 1 has a threaded hole 2 at its center, a chip removal groove 3 on the hole wall of the threaded hole 2, and threaded teeth 4 distributed on the hole wall of the threaded hole 2. The nut body 1 has both a chip removal groove 3 and threaded teeth 4. When the nut body 1 is screwed onto a smooth cylinder, the threaded teeth 4 on the hole wall of the nut body 1 can directly cut the cylinder material, thereby forming a matching external thread, thus achieving the effect of automatic tapping. At the same time, the cutting chips generated in this process are effectively discharged from the thread engagement area of ​​the nut body 1 through the chip removal groove 3, thereby preventing chip blockage and accumulation, thus realizing the integration of tapping and chip removal, eliminating the need for workers to use external tools for separate processing, thereby greatly improving work efficiency.

[0019] See Figure 1There are two chip removal grooves 3, which are arranged opposite to each other. One end of the chip removal groove 3 is flush with the end face of the nut body 1, and the other end of the chip removal groove 3 extends toward the inner center of the nut body 1. By setting two opposite chip removal grooves 3, the chip removal effect can be uniform, ensuring that the chips can be discharged smoothly. This makes the force on the nut body 1 more symmetrical when screwed in, preventing jamming or thread skewing caused by poor chip removal on one side. The fact that one end of the chip removal groove 3 is flush with the end face of the nut body 1 ensures that the chips can be discharged smoothly from the end of the nut body 1. The fact that the other end of the chip removal groove 3 extends toward the inner center of the nut body 1 ensures that the chip removal groove 3 has enough length to collect and transport the chips generated from the depth of the threaded hole 2, so that the chips can be discharged smoothly and continuously.

[0020] See Figure 1 The sidewall of the chip removal groove 3 is arc-shaped, and the sidewall of the chip removal groove 3 is smoothly connected to the wall of the threaded hole 2. By setting the sidewall of the chip removal groove 3 to an arc-shaped structure and a smooth transition connection, the resistance of the chip flow in the chip removal groove 3 can be effectively reduced, so that the chip is discharged more smoothly and the chip is avoided from adhering or clogging in the chip removal groove 3. At the same time, this smooth transition design eliminates sharp edges and reduces stress concentration, thereby improving the overall reliability and fatigue life of the nut body 1 in the cutting and tightening process, and thus extending the service life of the nut body 1.

[0021] See Figure 2 The threads 4 are spirally distributed on the wall of the threaded hole 2, and the surface of the threads 4 is a pointed structure. By setting the threads 4 to a spiral distribution, it is ensured that the nut body 1 can be screwed in continuously and smoothly. At the same time, the pointed structure of the threads 4 makes it more like the cutting edge of a cutting tool than the mating surface of a traditional nut. This pointed structure of the threads 4 not only significantly reduces the torque required for tapping, but also can easily cut into soft metals or nylon and other materials, efficiently cutting threads and greatly improving the practicality of the structure.

[0022] Example 2 See Figure 3The outer wall of the nut body 1 is fixedly equipped with six protective flanges 5. The six protective flanges 5 are evenly distributed on the six sharp corners of the outer wall of the nut body 1, and the upper and lower end faces of the protective flanges 5 are parallel to the upper and lower end faces of the nut body 1. By adding six protective flanges 5, on the one hand, it plays a protective role. When the nut body 1 falls or is hit, the protective flanges 5 will contact the ground first, avoiding direct damage to the sharp corners of the nut body 1 and affecting the thread accuracy. On the other hand, the protective flanges 5 increase the outer diameter of the nut body 1, providing a larger operating contact surface for tools such as wrenches, thus making it easier for workers to tighten, especially when a larger torque is required in the final tightening stage, resulting in more convenient and safer operation.

[0023] See Figure 3 The protective flange 5 is a circular structure, and the outer wall of the protective flange 5 is provided with a wavy anti-slip texture 501. By making the protective flange 5 a circular structure, sharp corners are further avoided, making it safer to use and less likely to scratch the operator or damage other parts. The addition of the wavy anti-slip texture 501 greatly increases the friction between the fingers or tools and the surface of the nut. Even in wet or oily environments or when wearing gloves, it can provide a firm grip and prevent slippage. It is convenient for manual pre-tightening or final tightening, making it more practical.

[0024] See Figure 3 A protective reinforcing rib 6 is fixedly installed between the nut body 1 and the protective flange 5. The upper and lower end faces of the protective reinforcing rib 6 are parallel to the upper and lower end faces of the nut body 1. By adding the protective reinforcing rib 6, it plays a supporting and reinforcing role between the protective flange 5 and the nut body 1. The protective reinforcing rib 6 can more effectively transmit the force applied to the protective flange 5 by the tool during tightening to the nut body 1, preventing the huge tightening torque from causing the protective flange 5 to deform or break from the nut body 1, thereby ensuring the long-term stability of the nut body 1 under heavy load and further extending the service life of the nut body 1.

[0025] The working process of this utility model: This utility model discloses a self-tapping chip-removing nut. During operation, when encountering a smooth cylinder made of soft metal or nylon, the operator does not need to perform any pre-processing on the smooth cylinder. The nut body 1 can be directly screwed onto the cylinder. The pointed thread 4 inside the nut body 1 acts as a cutting edge, continuously cutting the cylinder material during screwing, automatically tapping a matching external thread on the cylinder, thus achieving the effect of self-tapping. At the same time, the metal or nylon chips generated during this cutting process are guided by the rotation of the nut body 1 and continuously pushed towards the end of the nut body 1 along the chip removal groove 3 opened on the wall of the threaded hole 2. Finally, they are completely discharged from the thread engagement area from the end face of the nut body 1. The protective flange 5 with anti-slip texture 501 on the outside of the nut body 1 and the internal protective reinforcing rib 6 can jointly ensure that the operator can apply sufficient torque to complete the cutting and tightening process and protect the nut body 1 itself from damage. This application is simple to operate and has a reasonable design.

[0026] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0027] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A self-tapping chip-removing nut, characterized in that: It includes a nut body (1), a threaded hole (2), a chip removal groove (3), and threaded teeth (4); the nut body (1) has a threaded hole (2) at its center, the threaded hole (2) has a chip removal groove (3) on its wall, and the threaded hole (2) also has threaded teeth (4) distributed on its wall.

2. The self-tapping chip-removing nut as described in claim 1, characterized in that: There are two chip removal grooves (3), which are arranged opposite to each other. One end of the chip removal groove (3) is flush with the end face of the nut body (1), and the other end of the chip removal groove (3) extends toward the inner center of the nut body (1).

3. The self-tapping chip-removing nut as described in claim 1, characterized in that: The sidewall of the chip removal groove (3) is an arc-shaped structure, and the sidewall of the chip removal groove (3) and the hole wall of the threaded hole (2) are smoothly connected.

4. The self-tapping chip-removing nut as described in claim 1, characterized in that: The threads (4) are spirally distributed on the wall of the threaded hole (2), and the surface of the threads (4) is a pointed structure.

5. A self-tapping chip-removing nut as described in claim 1, characterized in that: The outer wall of the nut body (1) is fixedly equipped with six protective flanges (5). The six protective flanges (5) are evenly distributed on the six sharp corners of the outer wall of the nut body (1), and the upper and lower end faces of the protective flanges (5) are parallel to the upper and lower end faces of the nut body (1).

6. A self-tapping chip-removing nut as described in claim 5, characterized in that: The protective flange (5) is a circular structure, and the outer wall of the protective flange (5) is provided with anti-slip texture (501) in a wave-shaped structure.

7. A self-tapping chip-removing nut as described in claim 1, characterized in that: A protective reinforcing rib (6) is fixedly installed between the nut body (1) and the protective flange (5), and the upper and lower end faces of the protective reinforcing rib (6) are parallel to the upper and lower end faces of the nut body (1).

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