Installation process and application of grounding device with self-tapping nut

Abstract

The invention discloses a mounting process and application of a grounding device with a self-tapping nut. The mounting process of the grounding device with the self-tapping nut is that the grounding device is provided with the self-tapping nut, a connecting pin with a smooth surface and a grounding terminal. In the installation process, the self-tapping nut is directly screwed to the outer surface of the connecting pin in a rotating mode, threads matched with the self-tapping nut are extruded out of the connecting pin, meanwhile, impurities attached to the surface of the connecting pin are scraped away, and therefore an electric connection contact face between the self-tapping nut and the connecting pin is formed. The connecting pin has the beneficial effects that 1, the manufacturing cost of a bolt thread is saved, and meanwhile, the utilization rate of a connecting pin material is increased; 2, impurities attached to the surface of the connecting pin, such as electrophoretic paint, can be scraped off by self-tapping threads on the connecting pin through the self-tapping nut; and 3, the mounting process of the grounding device is diversified, and the limitation of the electrophoresis sequence can be eliminated. And 4, the connecting pin can be directly and integrally formed on the external fixing surface.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, and in particular to an installation process and application of a grounding device with a self-tapping nut. Background Art

[0002] The grounding device consists of three parts: bolts, nuts, and grounding terminals. Currently, the bolts and nuts in the grounding device need to be cut and tapped separately to form the internal and external threads that match each other, which causes material loss.

[0003] During the automotive manufacturing process, exposed body parts require electrophoretic coating to improve corrosion resistance. However, welding is not possible after electrophoresis. Current grounding devices are welded to the vehicle body before electrophoresis. However, since grounding devices need to be conductive, the paint produced by the vehicle's surface treatment can hinder the flow of current, necessitating multiple installation steps.

[0004] Due to the limitations of the above conditions, the current mainstream grounding device installation process can only be completed after the bolts, nuts, and grounding terminals have completed the preliminary separate preparation process. The grounding device manufacturer needs to assemble the bolts and nuts before shipping the whole unit. When it arrives at the automobile manufacturer, the assembled bolts and nuts are installed on the vehicle frame and then electrophoresed together. The bolts and nuts are then disassembled and the grounding terminals are installed. Finally, the nuts are reinstalled on the bolts to complete the grounding device installation process. This mainstream installation process requires the bolts and nuts to be disassembled and installed at least twice, and the grounding device manufacturer needs to assemble the bolts and nuts in advance, which is not only cumbersome but also incurs a lot of additional costs. More importantly, if the nut and bolt are not assembled tightly during the electrophoresis process, electrophoretic paint will penetrate between the threads and the supporting surface. Electrophoretic paint is insulating, which will affect the conductive effect of the grounding device. At the same time, the presence of electrophoretic paint will affect the threaded connection between the bolt and the nut, thereby affecting the subsequent installation of the nut into the bolt.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide an installation process and application of a grounding device with a self-tapping nut to solve the shortcomings of the existing technology. Summary of the Invention

[0006] A first object of the present invention is to overcome the shortcomings of the prior art and provide a method for installing a grounding device with a self-tapping nut. This method eliminates the limitations of electrophoresis sequence, simplifies the installation steps, reduces material loss, and improves the conductive reliability of the grounding device.

[0007] The above-mentioned purpose of the present invention is achieved through the following technical measures: A process for installing a grounding device with a self-tapping nut is provided. The grounding device is provided with a self-tapping nut, a connecting pin with a smooth surface, and a grounding terminal. During installation, the self-tapping nut is directly screwed onto the outer surface of the connecting pin, causing the connecting pin to extrude threads that match the self-tapping nut. At the same time, impurities attached to the surface of the connecting pin are scraped off to form an electrical connection contact surface between the self-tapping nut and the connecting pin. The grounding terminal is sleeved onto the outer periphery of the connecting pin, and the connecting pin is fixedly connected to an external fixing surface. The self-tapping nut is connected to the thread of the connecting pin, thereby fixing the grounding terminal between the connecting pin, the self-tapping nut, and the external fixing surface.

[0008] The installation process of the grounding device with self-tapping nuts of the present invention is carried out by the following steps: A1. The connecting pin is fixed to the external fixing surface alone; A2. Fit the ground terminal onto the outer periphery of the connecting pin; A3. Rotate and screw the self-tapping nut onto the outer surface of the upper end of the connecting pin, tap the thread with the connecting pin to fix it, and complete the installation of the grounding device.

[0009] Preferably, the impurities on the surface of the connecting pin are electrophoretic paint.

[0010] Preferably, the lower surface of the self-tapping nut is provided with a chip removal groove for accommodating scrapes of electrophoretic paint.

[0011] The installation process of the grounding device with a self-tapping nut of the present invention is carried out by the following steps: B1. The connecting pin is fixed to the external fixing surface alone; B2. electrophoresis the connecting pin and the external fixing surface as a whole; B3. Fit the grounding terminal onto the outer periphery of the connecting pin; B4. The self-tapping nut is rotated and screwed onto the outer surface of the upper end of the connecting pin, and is fixed to the connecting pin by tapping the threads. During the process of tapping the connecting pin, the self-tapping nut scrapes off part of the electrophoretic paint of the connecting pin and accommodates it inside the chip groove, thereby completing the installation of the grounding device.

[0012] The installation process of the grounding device with a self-tapping nut of the present invention is carried out by the following steps: C1. The self-tapping nut is screwed onto the outer surface of the upper end of the connecting pin; C2. electrophoresis the self-tapping nut, the connecting pin, and the external fixing surface as a whole; C3. Unscrew the self-tapping nut from the connecting pin; C4. Sleeve the ground terminal onto the outer periphery of the connecting pin; C5. Rotate the self-tapping nut to the connecting pin, and during the rotation and tightening process, scrape off part of the electrophoretic paint of the connecting pin and accommodate it inside the chip groove, thereby completing the installation of the grounding device.

[0013] Preferably, the connecting pin is a raised polished rod portion integrally formed with the external fixing surface.

[0014] Preferably, the connecting pin is a welding pin that is independent of the external fixing surface, and the end surface of the welding pin is provided with a welding cone surface, and the welding cone surface is fixedly connected to the external fixing surface by welding.

[0015] Preferably, the thread of the self-tapping nut is produced by an extrusion process.

[0016] Another object of the present invention is to overcome the shortcomings of the prior art and provide an application of a grounding device installation process with a self-tapping nut. This grounding device installation process with a self-tapping nut is applicable in the automotive field. This application simplifies the grounding device installation steps in the automotive field, reduces material loss, and improves the conductive reliability of the grounding device.

[0017] The above-mentioned purpose of the present invention is achieved through the following technical measures: Provided is an application of a grounding device with a self-tapping nut, and an installation process for a grounding device with a self-tapping nut for an automobile.

[0018] Preferably, the external fixing surface is a frame surface.

[0019] The present invention provides a grounding device installation process and application with a self-tapping nut, wherein the grounding device installation process with a self-tapping nut is provided with a self-tapping nut, a connecting pin with a smooth surface, and a grounding terminal. During the installation process, the self-tapping nut is directly rotated and screwed onto the outer surface of the connecting pin, so that the connecting pin extrude a thread that matches the self-tapping nut, and at the same time, impurities attached to the surface of the connecting pin are scraped off to form an electrical connection contact surface between the self-tapping nut and the connecting pin; the grounding terminal is sleeved on the outer periphery of the connecting pin, and the connecting pin is connected to the external fixed surface, and the self-tapping nut is connected to the thread of the connecting pin, so that the connecting pin, the self-tapping nut and the external fixed surface form a fixing part of the grounding terminal, so that the grounding terminal is fixed. The beneficial effects of the present invention are as follows: 1. The self-tapping nut is used to extrude threads on the connecting pin, which saves the manufacturing cost of the bolt thread and improves the utilization rate of the connecting pin material; 2. The self-tapping nut can also scrape off impurities attached to the surface of the connecting pin, such as electrophoretic paint, to ensure that an effective electrical connection contact surface is formed between the self-tapping nut and the connecting pin; 3. The installation process of the grounding device of the present invention is diversified. The self-tapping nut of the present invention can be assembled with the connecting pin after the external fixing surface and the connecting pin are electrophoresed as a whole. In this way, the assembly only requires one assembly of the self-tapping nut and the connecting pin, so there is no need for the grounding device manufacturer to combine and ship in advance, saving installation costs and achieving cost reduction and efficiency improvement; the present invention can also electrophores the self-tapping nut and the connecting pin together, and then scrape off impurities attached to the surface of the connecting pin by unscrewing and then screwing in the self-tapping nut, thereby further ensuring that the self-tapping nut and the connecting pin form an effective electrical connection contact surface, and there is no need to worry about the electrophoretic paint affecting the threaded connection between the bolt and the nut. Therefore, the present invention can get rid of the limitation of the order of electrophoresis. 4. Since the connecting pin of the present invention does not require pre-processing of threads, the connecting pin can be directly integrally formed on the external fixing surface. There is no need to add additional connecting pin production and additional fixing steps between the connecting pin and the external fixing surface, which greatly shortens the production time. In addition, the integrally formed connecting pin can also improve the connection strength with the external fixing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0021] Figure 1 This is an exploded diagram of the grounding device.

[0022] Figure 2 This is a schematic diagram of the installation process flow of the grounding device with self-tapping nuts in Example 2.

[0023] Figure 3 It is a cross-sectional view of the self-tapping nut of the present invention.

[0024] Figure 4 This is a schematic diagram of the installation process flow of the grounding device with self-tapping nuts in Example 3.

[0025] Figure 5 This is a schematic diagram of the installation process flow of the grounding device with self-tapping nuts in Example 4.

[0026] exist Figures 1 to 5 Including: Self-tapping nut 10, chip groove 110, Connecting pin 20, Ground terminal 30, External fixing surface 40, Electrophoretic paint 50. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described with reference to the following examples.

[0028] Example 1: A grounding device installation process with a self-tapping nut, wherein the grounding device of the present invention includes a self-tapping nut 10, a connecting pin 20 with a smooth surface and a grounding terminal 30, as shown in FIG. Figure 1 As shown, in Figure 1 The middle connecting pin 20 is a structural diagram after being self-threaded by the self-tapping nut 10.

[0029] The self-tapping nut 10 used in this embodiment consists of a nut body and a self-tapping thread part. The nut body is similar to an ordinary nut, such as having a standard hexagonal or other shaped head, so that it is easy to use tools to tighten or loosen the nut. The self-tapping nut 10 is to make the thread cut into the connecting pin 20, squeeze and cut out the corresponding internal thread. As the self-tapping nut 10 is continuously screwed in, a tight fit is formed between the self-tapping thread and the connecting pin 20, thereby achieving the purpose of connection and tightening. The self-tapping nut 10 of the present invention is a common self-tapping nut 10 in the prior art. As long as there is a self-tapping nut 10 that can achieve the above-mentioned function, it can be used as the self-tapping nut 10 of the present invention.

[0030] Moreover, the core hole in the self-tapping nut 10 of the present invention has a circular cross section, which can reduce the driving torque, specifically reduce friction, provide uniform guidance, and facilitate material flow.

[0031] During the installation process of the grounding device with a self-tapping nut of the present invention, the self-tapping nut 10 is directly rotated and screwed onto the outer surface of the connecting pin 20, so that the connecting pin 20 extrude a thread matching the self-tapping nut 10, and at the same time, impurities attached to the surface of the connecting pin 20 are scraped off to form an electrical connection contact surface between the self-tapping nut 10 and the connecting pin 20. The impurities mentioned in the present invention can be dust, electrophoretic paint and other substances on the outer surface of the connecting pin 20 that affect the conductive properties; the grounding terminal 30 is sleeved on the outer periphery of the connecting pin 20, and the connecting pin 20 is fixedly connected to the external fixing surface 40, and the self-tapping nut 10 is threadedly connected to the connecting pin 20, so that the connecting pin 20, the self-tapping nut 10 and the external fixing surface 40 form a fixing part of the grounding terminal 30, so that the grounding terminal 30 is fixed and constitutes an electrical conduction channel.

[0032] The grounding device can form an electrical conduction channel as long as there is no electrophoretic coating anywhere among the self-tapping nut 10, the grounding terminal 30, and the connecting pin 20 and they are connected, and the current flows through the grounding terminal 30, the flange surface of the self-tapping nut 10, the body of the self-tapping nut 10, the thread of the self-tapping nut 10, the thread of the connecting pin 20, the body of the connecting pin 20, and then to the external fixing surface 40.

[0033] It should be noted that the self-tapping nut 10 of the present invention can perform self-tapping threads on the connecting pin 20. Specifically, the internal thread of the self-tapping nut 10 is used to extrude and deform the surface of the connecting pin 20, so that the surface of the connecting pin 20 forms a thread that matches the thread of the self-tapping nut 10. This process causes the surface of the connecting pin 20 to deform to produce threads. Unlike the cutting and tapping to produce threads in the prior art, the connecting pin 20 will not have material loss, thereby improving the material utilization rate of the connecting pin 20. Moreover, the connecting pin 20 does not need to be threaded in advance, eliminating the manufacturing cost of the bolt thread.

[0034] More importantly, even when the self-tapping nut 10 is used to self-tap the connecting pin 20 after electrophoresis, the surface of the connecting pin 20 will be deformed at this time, and the impurities attached to the surface of the connecting pin 20 and the electrophoretic paint 50 will fall off, so an effective electrical connection contact surface is still formed between the self-tapping nut 10 and the connecting pin 20.

[0035] Since the self-tapping nut 10 of the present invention can self-drill the connecting pin 20 and can also scrape off impurities attached to the surface of the connecting pin 20, there is no need to follow the installation steps of the prior art. The assembly sequence of the self-tapping nut 10 can be selected according to actual needs, which greatly improves the installation flexibility of the grounding device of the present invention.

[0036] The connecting pin 20 can be a raised polished rod portion integrally formed with the external fixing surface 40, or a welding pin independent of the external fixing surface 40, with a welding cone surface provided on the end face of the welding pin, which is fixedly connected to the external fixing surface 40 by welding.

[0037] The connecting pin 20 of the present invention is composed of a polished rod pin. When the connecting pin 20 is an independent welding pin, the welding pin can be formed by cold heading; when the connecting pin 20 of the present invention is a raised polished rod part integrally formed with the external fixing surface 40, the connecting pin 20 of the present invention is a part of the external fixing surface 40 and can be formed by die casting. The specific structure of the connecting pin 20 can be determined according to actual conditions.

[0038] The connecting pin 20 of the present invention is merely a protruding polished rod, requiring no additional threading operation. Therefore, the connecting pin 20 of the present invention can be a protruding polished rod portion integrally formed with the external fixing surface 40, or a welded pin that is independent of the external fixing surface 40, with the end face of the welding pin provided with a welding cone surface that is fixedly connected to the external fixing surface 40 by welding. When the connecting pin 20 is a protruding polished rod portion integrally formed with the external fixing surface 40, there is no need for additional production of the connecting pin 20, nor is there an additional step of fixing the connecting pin 20 to the external fixing surface 40, which greatly shortens production time. Furthermore, the integrally formed connecting pin 20 can also improve the connection strength with the external fixing surface 40. Furthermore, the integrally formed connecting pin 20 of the present invention completely changes the manufacturing approach of the prior art grounding device.

[0039] The beneficial effects of the grounding device installation process with a self-tapping nut are as follows: 1. The use of the self-tapping nut 10 to extrude threads on the connecting pin 20 saves the manufacturing cost of the bolt thread and improves the utilization rate of the connecting pin 20 material; 2. The self-tapping nut 10 can also scrape off impurities attached to the surface of the connecting pin 20, such as electrophoretic paint 50, by tapping the threads on the connecting pin 20, thereby ensuring that an effective electrical connection contact surface is formed between the self-tapping nut 10 and the connecting pin 20; 3. The grounding device installation process of the present invention is diversified. The present invention does not need to combine the self-tapping nut 10 and the connecting pin 20 and then perform electrophoresis like the prior art, thus getting rid of the limitation of the electrophoresis order. 4. Since the connecting pin 20 of the present invention does not need to be pre-threaded, the connecting pin 20 can be directly integrally formed on the external fixing surface 40, without the need for additional production of the connecting pin 20 and additional fixing steps of the connecting pin 20 and the external fixing surface 40, which greatly shortens the production time. In addition, the integrally formed connecting pin 20 can also improve the connection strength with the external fixing surface 40.

[0040] Example 2: A grounding device installation process with a self-tapping nut, such as Figure 2As shown, other features are the same as those of embodiment 1, and further have the following features: the installation process of the grounding device with self-tapping nuts is performed by the following steps: A1, the connecting pin 20 is fixed to the external fixing surface 40 alone; A2. Fit the ground terminal 30 onto the outer periphery of the connecting pin 20; A3. Rotate and screw the self-tapping nut 10 onto the outer surface of the upper end of the connecting pin 20, tap the thread with the connecting pin 20 to fix it, and complete the installation of the grounding device.

[0041] The grounding device installation process of this embodiment is also applicable to the installation of grounding devices that do not require electrophoresis operations, such as electroplating or other protection situations that do not affect conductivity.

[0042] Example 3: A grounding device installation process with a self-tapping nut. Other features are the same as those of Example 1, and also have the following features: The lower surface of the self-tapping nut 10 of this embodiment is provided with a chip removal groove 110 for accommodating scraps of the electrophoretic paint 50. Figure 3 shown.

[0043] The installation process of the grounding device with self-tapping nuts, such as Figure 4 As shown, the installation is performed as follows: The installation process of the grounding device with self-tapping nuts in this embodiment is carried out by the following steps: B1, the connecting pin 20 is fixed to the external fixing surface 40 alone; B2. Electrophoresis is performed on the connecting pin 20 and the external fixing surface 40 as a whole; B3. Fit the ground terminal 30 onto the outer periphery of the connecting pin 20; B4. The self-tapping nut 10 is rotated and screwed onto the outer surface of the upper end of the connecting pin 20, and is fixed to the connecting pin 20 by tapping the threads. During the tapping process of the connecting pin 20, the self-tapping nut 10 scrapes off part of the electrophoretic paint 50 of the connecting pin 20 and accommodates it inside the chip groove 110, completing the installation of the grounding device.

[0044] The self-drilling nut 10 of this embodiment is assembled with the connecting pin 20 after the external fixing surface 40 and the connecting pin 20 are electrophoretically coated. During the process of being screwed into the connecting pin 20, the self-drilling nut 10 simultaneously scrapes away residual electrophoretic paint 50 on the surface of the connecting pin 20 while tapping the connecting pin 20. These residual electrophoretic paint 50 fragments are also discharged into the chip removal groove 110 during the tapping process and will not remain between the threads, thus ensuring that an effective electrical connection contact surface is formed between the self-drilling nut 10 and the connecting pin 20. Moreover, this assembly only requires the self-drilling nut 10 and the connecting pin 20 to be assembled once, eliminating the need for the grounding device manufacturer to pre-assemble and ship the components together, saving installation costs and achieving cost reduction and efficiency improvement.

[0045] Example 4: A grounding device installation process with a self-tapping nut. Other features are the same as those of Example 1, and also have the following features: The lower surface of the self-tapping nut 10 of this embodiment is provided with a chip groove 110 for accommodating scraps of the electrophoretic paint 50. Figure 3 shown.

[0046] The installation process of the grounding device with self-tapping nuts in this embodiment is as follows: Figure 5 As shown, the following steps are performed: C1. The self-tapping nut 10 is screwed onto the outer surface of the upper end of the connecting pin 20; C2. Electrophoresis the self-tapping nut 10, the connecting pin 20 and the external fixing surface 40 as a whole; C3. Unscrew the self-tapping nut 10 from the connecting pin 20; C4. Fit the ground terminal 30 onto the outer periphery of the connecting pin 20; C5. Rotate the self-tapping nut 10 to the connecting pin 20. During the rotation and tightening process, part of the electrophoretic paint 50 of the connecting pin 20 is scraped off and accommodated in the chip removal groove 110, thereby completing the installation of the grounding device.

[0047] It should be noted that the self-tapping nut 10 and the connecting pin 20 of this embodiment are electrophoretically processed simultaneously. Since the self-tapping nut 10 and the connecting pin 20 of the present invention are extruded, the gap between the self-tapping nut 10 and the connecting pin 20 is very small, and it is difficult for the electrophoretic paint 50 to enter. Even if a very small amount of electrophoretic paint 50 enters between the self-tapping nut 10 and the connecting pin 20, the present invention will scrape off this part of the electrophoretic paint 50 and accommodate it inside the chip removal groove 110 when the self-tapping nut 10 is rotated and screwed to the connecting pin 20 again.

[0048] Compared with the third embodiment, the electrical connection contact surface between the self-tapping nut 10 and the connecting pin 20 of this embodiment is larger, so the conductive effect is better.

[0049] Example 5: A process for installing a grounding device with a self-tapping nut, which has the same other features as any one of Examples 1 to 4, and also has the following features: the thread of the self-tapping nut 10 is made by an extrusion process.

[0050] The thread of the self-tapping nut 10 of this embodiment is an extruded thread, so that the self-tapping nut 10 can further reduce material loss, and the metal fiber structure of the extruded thread is continuous and not cut, and the strength of the thread is improved, thereby effectively improving the tapping effect of the self-tapping nut 10 on the connecting pin 20.

[0051] Example 6: Application of a grounding device with a self-tapping nut, wherein the grounding device with a self-tapping nut installation process of any one of Examples 1 to 5 is installed in the automotive field. The external fixing surface 40 is the surface of the vehicle frame.

[0052] The beneficial effects of the application of the grounding device with self-tapping nut are as follows: 1. The self-tapping nut 10 is used to extrude the thread on the connecting pin 20, which saves the manufacturing cost of the bolt thread and improves the utilization rate of the material of the connecting pin 20; 2. The self-tapping nut 10 can also scrape off the impurities attached to the surface of the connecting pin 20, such as electrophoretic paint 50, by tapping the thread on the connecting pin 20, so as to ensure that an effective electrical connection contact surface is formed between the self-tapping nut 10 and the connecting pin 20; 3. The installation process of the grounding device of the present invention is diversified. The self-tapping nut 10 of the present invention can be assembled with the connecting pin 20 after the external fixing surface 40 and the connecting pin 20 are electrophoresed as a whole. In this way, the assembly only requires The self-tapping nut 10 and the connecting pin 20 need to be assembled once, so the grounding device manufacturer does not need to pre-assemble and ship them, saving installation costs and achieving cost reduction and efficiency improvement. The present invention can also electrophoretically process the self-tapping nut 10 and the connecting pin 20 together, and then scrape off the impurities attached to the surface of the connecting pin 20 by screwing out and screwing in the self-tapping nut 10, thereby further ensuring that the self-tapping nut 10 and the connecting pin 20 form an effective electrical connection contact surface, and there is no need to worry about the electrophoretic paint 50 affecting the threaded connection between the bolt and the nut. The present invention does not need to combine the self-tapping nut 10 and the connecting pin 20 before electrophoresis, as in the prior art, and is free from the restrictions of the electrophoresis order. 4. Since the connecting pin 20 of the present invention does not require pre-processing of threads, the connecting pin 20 can be directly integrally formed on the external fixing surface 40, without the need for additional production of the connecting pin 20 and additional fixing steps of the connecting pin 20 and the external fixing surface 40, which greatly shortens the production time. In addition, the integrally formed connecting pin 20 can also improve the connection strength with the external fixing surface 40.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A process for installing a grounding device with a self-tapping nut, characterized in that: The grounding device includes a self-tapping nut, a connecting pin with a smooth surface and a grounding terminal; During the installation process, the self-tapping nut is directly rotated and screwed onto the outer surface of the connecting pin, so that the connecting pin extrude a thread that matches the self-tapping nut, and at the same time, impurities attached to the surface of the connecting pin are scraped off to form an electrical connection contact surface between the self-tapping nut and the connecting pin; The grounding terminal is sleeved on the outer periphery of the connecting pin, and the connecting pin is fixedly connected to the external fixing surface, and the self-tapping nut is threadedly connected to the connecting pin, so that the grounding terminal is fixed by the connecting pin, the self-tapping nut and the external fixing surface.

2. The installation process of the grounding device with self-tapping nuts according to claim 1, characterized in that: Install it by following the steps below: A1. The connecting pin is fixed to the external fixing surface alone; A2. Fit the ground terminal onto the outer periphery of the connecting pin; A3. Rotate and screw the self-tapping nut onto the outer surface of the upper end of the connecting pin, tap the thread with the connecting pin to fix it, and complete the installation of the grounding device.

3. The installation process of the grounding device with self-tapping nuts according to claim 1, characterized in that: The impurities on the surface of the connecting pin are electrophoretic paint.

4. The installation process of the grounding device with self-tapping nuts according to claim 3, characterized in that: The lower surface of the self-tapping nut is provided with a chip removal groove for accommodating scrapes of electrophoretic paint.

5. The installation process of the grounding device with self-tapping nuts according to claim 4, characterized in that: Proceed as follows: B1. The connecting pin is fixed to the external fixing surface alone; B2. electrophoresis the connecting pin and the external fixing surface as a whole; B3. Fit the grounding terminal onto the outer periphery of the connecting pin; B4. The self-tapping nut is rotated and screwed onto the outer surface of the upper end of the connecting pin, and is fixed to the connecting pin by tapping the threads. During the process of tapping the connecting pin, the self-tapping nut scrapes off part of the electrophoretic paint of the connecting pin and accommodates it inside the chip groove, thereby completing the installation of the grounding device.

6. The installation process of the grounding device with self-tapping nuts according to claim 5, characterized in that: Proceed as follows: C1. The self-tapping nut is screwed onto the outer surface of the upper end of the connecting pin; C2. electrophoresis the self-tapping nut, the connecting pin, and the external fixing surface as a whole; C3. Unscrew the self-tapping nut from the connecting pin; C4. Sleeve the ground terminal onto the outer periphery of the connecting pin; C5. Rotate the self-tapping nut to the connecting pin, and during the rotation and tightening process, scrape off part of the electrophoretic paint of the connecting pin and accommodate it inside the chip groove, thereby completing the installation of the grounding device.

7. The process for installing a grounding device with a self-tapping nut according to any one of claims 1 to 6, characterized in that: The connecting pin is a raised polished rod portion integrally formed with the external fixing surface.

8. The process for installing a grounding device with a self-tapping nut according to any one of claims 1 to 6, characterized in that: The connecting pin is a welding pin that is independent of the external fixing surface. The end surface of the welding pin is provided with a welding cone surface, and the welding cone surface is fixedly connected to the external fixing surface by welding.

9. The process for installing a grounding device with a self-tapping nut according to any one of claims 1 to 6, characterized in that: The threads of the self-tapping nut are produced by an extrusion process.

10. An application of a grounding device with a self-tapping nut, characterized in that: Installation of a vehicle grounding device using the grounding device installation process with a self-tapping nut according to any one of claims 1 to 9; The external fixing surface is the surface of the vehicle frame.

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