Threaded pipe and vehicle

Abstract

The embodiment of the application provides a threaded pipe and a vehicle, the threaded pipe comprising a first pipe segment, a fixed part connected with a first end of the first pipe segment, and a second pipe segment connected with an end of the fixed part away from the first pipe segment; the threaded pipe has an internal thread hole, the internal thread hole is in a direction from the second pipe segment to the first pipe segment, the internal thread hole penetrates the second pipe segment and the fixed part, and extends to a second end of the first pipe segment. In the embodiment of the application, by additionally arranging the second pipe segment, the overall shear performance of the threaded pipe and a threaded fastener matched with the threaded pipe can be significantly improved, in a collision working condition, the second pipe segment can bear part of the shear force, thereby effectively protecting the threaded fastener matched with the threaded pipe, and avoiding the threaded fastener from being broken in the collision working condition.

Description

Technical Field

[0001] This application relates to the field of threaded pipe technology, and more particularly to a threaded pipe and a vehicle. Background Technology

[0002] With the development of automobiles, people have increasingly higher requirements for the crash performance of vehicles. For example, certain critical bolt-type fasteners are required not to break during a collision. In related technologies, the connection between two parts in a vehicle is usually achieved through the combination of a threaded tube and a bolt. The threaded tube is welded to one of the parts, and the bolt passes through a through hole on both parts and is threadedly connected to the threaded tube.

[0003] However, in the event of a collision, conventional threaded pipes cannot effectively protect the bolts they mate with, which can easily lead to bolt breakage and fail to meet the collision requirements. Utility Model Content

[0004] This application provides a threaded pipe and a vehicle, which aims to improve the problem that bolts mating with conventional threaded pipes are prone to breakage upon impact.

[0005] In a first aspect, embodiments of this application provide a threaded pipe, including a first pipe section, a fixing part connected to a first end of the first pipe section, and a second pipe section connected to an end of the fixing part away from the first pipe section;

[0006] The threaded pipe has an internal threaded hole in the direction from the second pipe segment to the first pipe segment. The internal threaded hole passes through the second pipe segment and the fixing part, and extends to the second end of the first pipe segment.

[0007] Based on the above technical means, a second pipe section is added at the end of the fixed part away from the first pipe section. The second pipe section is connected to the threaded fastener through an internal threaded hole. The outer diameter of the second pipe section is larger than the diameter of the external thread of the threaded fastener. By adding the second pipe section, the overall shear resistance of the threaded pipe and the threaded fastener that mates with it can be significantly improved. Under collision conditions, the second pipe section can bear part of the shear force, thereby effectively protecting the threaded fastener that mates with the threaded pipe and preventing the threaded fastener from breaking under collision conditions.

[0008] Optionally, the second end of the first pipe section is closed, making the internal threaded hole a blind hole.

[0009] Based on the above-mentioned technical means, the risk of corrosion caused by water entering the vehicle through the gap between the internal and external threads when the vehicle, including the threaded pipe, is avoided.

[0010] Optionally, the threaded pipe further includes a platform stage, which is connected to the second end of the first pipe segment. The outer diameter of the platform stage is smaller than the outer diameter of the first pipe segment, and the surface of the platform stage facing away from the first pipe segment is a plane.

[0011] Based on the above technical means, by setting the stage, the flatness of the end face of the threaded tube near the stage can be guaranteed. Thus, when the threaded tube is welded to the car body, the pressure head in the projection welding equipment can be pressed tightly against the end face of the threaded tube near the stage, thereby ensuring the projection welding strength and the performance of the threaded tube.

[0012] Optionally, the threaded tube further has a process blind hole, which is at least partially located in the stage, and the axis of the process blind hole is collinear with the axis of the internal threaded hole.

[0013] Based on the above technical means, while ensuring that both ends of the threaded pipe are concentric, the process blind hole is not connected to the internal threaded hole, thereby avoiding the risk of corrosion caused by water entering the vehicle through the gap between the internal and external threads when the vehicle, including the threaded pipe, is wading through water.

[0014] Optionally, the first pipe segment is connected to the fixing part through a transition section, the transition section having a tapered surface; the outer diameter of the transition section gradually increases from the first pipe segment to the second pipe segment.

[0015] Based on the above technical means, the risk of cracking caused by stress concentration during the cold forming of threaded pipes can be avoided, thereby improving product quality.

[0016] Optionally, the fixing part includes a disc body and a plurality of protrusions, the plurality of protrusions being disposed on the surface of the disc body opposite to the first pipe section.

[0017] Based on the aforementioned technical methods, the fixing part is welded to the vehicle body through multi-point projection welding. This effectively reduces heat generation during the welding process, minimizes thermal deformation, and ensures the flatness of the welded surface. It also prevents false torque from forming after bolt assembly due to uneven welded surfaces, thereby ensuring the tightening strength and shear strength of the threaded fasteners. Furthermore, compared to full-circle projection welding, multi-point projection welding requires relatively lower pressure from the welding equipment, allowing for the use of lower-pressure equipment and reducing equipment investment costs.

[0018] Optionally, the length of the internal threaded hole is greater than or equal to 40 mm and less than or equal to 80 mm.

[0019] Based on the above technical means, the length of the internal threaded hole is relatively long, so that the threaded fastener and the internal threaded hole have sufficient engagement length, thereby ensuring sufficient fastening strength between the threaded fastener and the threaded pipe.

[0020] Optionally, the difference between the outer diameter of the second pipe section and the diameter of the internal threaded hole is greater than or equal to 6 mm.

[0021] Based on the above technical means, the second pipe section has sufficient strength, which can greatly improve the overall shear resistance of the threaded pipe and its mating threaded fasteners, and ensure the strength of the internal threaded hole in this part of the second pipe section, thereby ensuring the fastening strength between the threaded fasteners and the threaded pipe.

[0022] Optionally, the end of the second pipe section opposite to the fixed part is provided with a guide structure.

[0023] Based on the above technical means, during the assembly process, it is convenient for the second pipe section in the threaded pipe to extend into the inner hole of the bushing, which facilitates alignment and assembly, thereby improving assembly efficiency.

[0024] Secondly, embodiments of this application provide a vehicle including the threaded tube as described above. Attached Figure Description

[0025] Figure 1 A perspective view of a threaded pipe provided in an embodiment of this application;

[0026] Figure 2 A front view schematic diagram of a threaded pipe provided in an embodiment of this application;

[0027] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0028] Figure 4 This is a side view of a threaded pipe provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-First pipe section, 11-Side plate section, 12-End plate section, 2-Second pipe section, 21-Guide structure, 3-Fixing part, 31-Disc body, 32-Protrusion, 4-Transition section, 41-Conical surface, 5-Internal threaded hole, 6-Stage stage, 7-Process blind hole. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] In related technologies, the connection between two parts in a vehicle is typically achieved through the use of threaded pipes and bolts. The threaded pipe is welded to one of the parts, and the bolt passes through through holes in both parts and is threadedly connected to the threaded pipe. Conventional threaded pipes consist of only a pipe body on one side and a flange at one end of the pipe body. When used in scenarios where the vehicle body and subframe are connected, the flange is welded to the vehicle body. However, in a collision, conventional threaded pipes cannot effectively protect the bolts they mate with, making them prone to breakage and failing to meet collision requirements. To address these issues, this application provides a threaded pipe and a vehicle, which are described in detail below.

[0033] Reference Figures 1 to 3 The threaded pipe provided in this application embodiment includes a first pipe section 1, a fixing part 3 connected to a first end of the first pipe section 1, and a second pipe section 2 connected to a end of the fixing part 3 away from the first pipe section 1; the threaded pipe has an internal threaded hole 5, which is directed from the second pipe section 2 to the first pipe section 1, the internal threaded hole 5 passes through the second pipe section 2 and the fixing part 3, and extends to the second end of the first pipe section 1.

[0034] The internal threaded hole 5 in the threaded pipe is used for threaded connection with a threaded fastener, which can be a bolt. Both the first pipe section 1 and the second pipe section 2 are hollow cylindrical bodies, and their outer diameters are both larger than the diameter of the external thread in the threaded fastener. Along the axial direction of the threaded pipe, the length of the second pipe section 2 can be less than or equal to the length of the first pipe section 1. The length of the first pipe section 1 can be 30mm-60mm, and the length of the second pipe section 2 can be 25mm-45mm.

[0035] The first pipe section 1 has a first end and a second end arranged opposite to each other along the axial direction of the threaded pipe, and the fixing part 3 is connected to the first end of the first pipe section 1. The direction of the second pipe section 2 pointing towards the first pipe section 1 can be referenced. Figure 3 In the direction indicated by arrow B, the internally threaded hole 5 may not penetrate the second end of the first pipe section 1; in this case, the internally threaded hole 5 is a blind hole. Alternatively, the internally threaded hole 5 may penetrate the second end of the first pipe section 1.

[0036] The vehicle includes a body and a subframe, with a fixing part 3 for welding to the body. The body has a through hole, and the subframe has a bushing with an inner bore. A second pipe section 2 passes through the through hole in the body and extends into the inner bore of the bushing. Along the axial direction of the threaded pipe, the length of the second pipe section 2 can be less than the total length of the through hole and the inner bore of the bushing.

[0037] In related technologies, during impact tests, the bolts that mate with conventional threaded pipes are subjected to the greatest shear force at the position on the flange away from the pipe body, which is also the position of the second pipe section 2 in this application. The bolts at this position are prone to breakage during impact tests.

[0038] In this embodiment, a second pipe section 2 is added to the end of the fixing part 3 opposite to the first pipe section 1. The second pipe section 2 is connected to the threaded fastener through an internal threaded hole 5. The outer diameter of the second pipe section 2 is larger than the diameter of the external thread of the threaded fastener. By adding the second pipe section 2, the overall shear resistance of the threaded pipe and its mating threaded fastener can be significantly improved. Under impact conditions, the second pipe section 2 can bear part of the shear force, thereby effectively protecting the threaded fastener mating with the threaded pipe and preventing the threaded fastener from breaking under impact conditions. Specifically, the overall shear resistance of the threaded pipe and its mating threaded fastener includes, but is not limited to, overall shear strength.

[0039] In related technologies, if the bolts mating with conventional threaded pipes break during collision tests, the specifications of the bolts, conventional threaded pipes, and bushings on the subframe need to be increased, leading to increased costs. In this embodiment, by changing the structure of the threaded pipe, the overall shear resistance of the threaded pipe and its mating threaded fasteners can be improved, preventing the threaded fasteners from breaking under collision conditions. This eliminates the need to increase the specifications of the bolts, threaded pipes, and bushings on the subframe, thus avoiding increased costs.

[0040] In some embodiments, refer to Figure 3 The second end of the first pipe section 1 is closed, making the internal threaded hole 5 a blind hole.

[0041] The first pipe section 1 includes a side plate portion 11 and an end plate portion 12. The internally threaded hole 5 in this portion of the first pipe section 1 is located on the inner wall of the side plate portion 11. The end plate portion 12 is located at the second end of the first pipe section 1, thus closing the second end of the first pipe section 1. The difference between the outer diameter of the first pipe section 1 and the diameter of the internally threaded hole 5 is greater than or equal to 8 mm, and the wall thickness of the side plate portion 11 is greater than or equal to 4 mm, ensuring the strength of this portion of the internally threaded hole 5 in the first pipe section 1, thereby ensuring the fastening strength between the threaded fastener and the threaded pipe. The internally threaded hole 5 is a blind hole, meaning that the internally threaded hole 5 does not penetrate the entire threaded pipe.

[0042] In related technologies, the internal thread of a threaded pipe penetrates the pipe. Because a gap exists between the internal and external threads after the bolt and the threaded pipe are assembled, water can easily enter the vehicle through this gap when it is wading through water, leading to a corrosion risk. In this embodiment, the internal threaded hole 5 is a blind hole, which avoids the risk of corrosion caused by water entering the vehicle through the gap between the internal and external threads when the vehicle, including the threaded pipe, is wading through water.

[0043] In some embodiments, refer to Figures 1 to 3 The first pipe section 1 is connected to the fixed part 3 through the transition section 4, and the transition section 4 has a tapered surface 41; the outer diameter of the transition section 4 gradually increases from the first pipe section 1 to the second pipe section 2.

[0044] The direction from the first pipe section 1 to the second pipe section 2 can be referenced. Figure 3 The direction indicated by arrow C. The internal threaded hole 5 also penetrates the transition section 4. The first pipe section 1 can be smoothly connected to the transition section 4 through the first fillet. The taper of the tapered surface 41 can be 30 degrees. In related technologies, the junction of the pipe body and the flange in a threaded pipe is a right-angle structure. During cold forging, stress concentration is prone to occur at this location, which can lead to cracking of the threaded pipe during cold forging. In this embodiment, the first pipe section 1 is connected to the fixing part 3 through the transition section 4, and the transition section 4 has a tapered surface 41, which can avoid the risk of cracking caused by stress concentration during cold forging of the threaded pipe, thereby improving product quality.

[0045] In some embodiments, refer to Figure 2 and Figure 4 The fixing part 3 includes a disc body 31 and multiple protrusions 32, which are disposed on the surface of the disc body 31 facing away from the first pipe section 1. The protrusions 32 can be circular, meaning that in the direction perpendicular to the axial direction of the threaded pipe, the cross-sectional shape of the protrusion 32 is circular. The cross-sectional area of ​​the protrusion 32 can gradually decrease from the first pipe section 1 to the second pipe section 2. The multiple protrusions 32 are of equal height. The number of protrusions 32 can be set according to actual needs, for example, 2, 3, 4, 5, etc. The multiple protrusions 32 are used for welding to the vehicle body.

[0046] The disc body 31 can be connected to the second pipe section 2 via a second fillet. The cross-sectional shape of the disc body 31 perpendicular to the axial direction of the threaded pipe is circular. The outer diameter of the disc body 31 is larger than the outer diameter of the first pipe section 1, and the difference is greater than or equal to 4 mm. Along the axial direction of the threaded pipe, the thickness of the disc body 31 is greater than or equal to 4 mm to ensure the strength of the disc body 31. In addition, by setting the difference between the outer diameter of the disc body 31 and the outer diameter of the first pipe section 1 to be greater than or equal to 4 mm, it is also possible to ensure that there is sufficient space for the multiple protrusions 32 to be reasonably arranged.

[0047] The maximum diameter of the protrusion 32 can be 4mm. The protrusion 32 protrudes from the disc body 31 away from the surface of the first pipe section 1, and the protrusion height of the protrusion 32 can be 1.5mm. By using multiple protrusions 32 and their dimensional settings, the welding strength between the threaded pipe and the vehicle body can be guaranteed. Welding tests have verified that when there are 3 protrusions 32, the maximum diameter of the protrusion 32 is 4mm, and the protrusion height of the protrusion 32 is 1.5mm, the welding strength between the threaded pipe and the vehicle body meets the design requirements.

[0048] In related technologies, the flange in the threaded pipe is welded to the vehicle body by arc welding. The arc welding process generates a lot of heat and has a large thermal deformation, which can easily lead to unevenness of the welded surface. After the bolts are assembled, false torque is easily formed, resulting in insufficient bolt fastening strength and shear strength, which in turn leads to bolt breakage in the crash test and bolt loosening in the durability test.

[0049] In this embodiment, the fixing part 3 is welded to the vehicle body via multi-point projection welding. This effectively reduces heat generation during welding, minimizes thermal deformation, and ensures the flatness of the welded surface. It also prevents false torque from forming after bolt assembly due to uneven welded surfaces, thereby ensuring the fastening strength and shear strength of the threaded fasteners. Furthermore, compared to full-circle projection welding, multi-point projection welding requires less pressure from the welding equipment, allowing for the use of lower-pressure equipment and reducing equipment investment costs.

[0050] In some embodiments, the length of the internally threaded hole 5 is greater than or equal to 40 mm and less than or equal to 80 mm. The length of the internally threaded hole 5 can be 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, etc. In this embodiment, the relatively long length of the internally threaded hole 5 ensures sufficient engagement length between the threaded fastener and the internally threaded hole 5, thereby guaranteeing sufficient fastening strength between the threaded fastener and the threaded pipe.

[0051] In some embodiments, the difference between the outer diameter of the second pipe section 2 and the diameter of the internal threaded hole 5 is greater than or equal to 6 mm. Alternatively, the difference can be less than or equal to 10 mm. In this embodiment, when the difference between the outer diameter of the second pipe section 2 and the diameter of the internal threaded hole 5 is within the aforementioned range, the second pipe section 2 has sufficient strength, thereby significantly improving the overall shear resistance of the threaded pipe and its mating threaded fasteners, and ensuring the strength of this portion of the internal threaded hole 5 within the second pipe section 2, thus guaranteeing the fastening strength between the threaded fasteners and the threaded pipe.

[0052] In some embodiments, refer to Figures 1 to 3 The threaded pipe also includes a stage 6, which is connected to the second end of the first pipe section 1. The outer diameter of the stage 6 is smaller than the outer diameter of the first pipe section 1, and the surface of the stage 6 facing away from the first pipe section 1 is a plane.

[0053] The cross-section of stage 6, perpendicular to the axial direction of the threaded tube, is circular. The outer diameter of stage 6 can be 20mm, and its thickness along the axial direction of the threaded tube can be 1mm. The second end of the first tube segment 1 can have a third fillet, specifically, the third fillet of the first tube segment 1 connects to stage 6. Along the axial direction of the threaded tube, the distance between the surface of stage 6 and the internal threaded hole 5 is greater than or equal to 4mm to ensure the formability of the threaded tube during cold heading and facilitate its production.

[0054] In this embodiment, the flatness of the end face of the threaded tube near the stage 6 can be ensured by setting the stage 6. Thus, when the threaded tube is welded to the car body, the pressure head in the projection welding equipment can be pressed tightly against the end face of the threaded tube near the stage 6, thereby ensuring the projection welding strength and the performance of the threaded tube.

[0055] In some embodiments, refer to Figure 1 and Figure 3 The threaded pipe also has a process blind hole 7, which is at least partially located in the stage 6, and the axis of the process blind hole 7 is on the same straight line as the axis of the internal threaded hole 5.

[0056] The process blind hole 7 can be a circular hole with a diameter of 4 mm and a depth of 1.5 mm. The process blind hole 7 can be partially located in the stepped section 6 and partially extended into the end plate portion 12 of the first pipe section 1, or it can be entirely located in the stepped section 6. The process blind hole 7 does not communicate with the internal threaded hole 5.

[0057] Two ejector pins are required in the cold heading die used for forming threaded tubes to position the two ends of the workpiece, thereby ensuring that the two ends of the formed threaded tube are concentric. This, in turn, ensures the coaxiality of the internal threaded hole of the threaded tube after connection with the threaded fastener, avoiding the impact on the performance caused by the tilting of the threaded fastener after assembly. During the cold heading of the threaded tube, the ejector pins will form the process blind hole 7 on the workpiece. In this embodiment, while ensuring the concentricity of the two ends of the threaded tube, the process blind hole 7 is not connected to the internal threaded hole 5, thereby avoiding the risk of corrosion caused by water entering the vehicle through the gap between the internal and external threads when the vehicle containing the threaded tube is wading through water.

[0058] In some embodiments, refer to Figure 2 and Figure 3 The second pipe section 2 is provided with a guide structure 21 at one end away from the fixed part 3.

[0059] The guide structure 21 can be a chamfered corner, an arc-shaped guide surface, etc. When the guide structure 21 is a chamfered corner, the inclination angle of the chamfer can be 20 degrees to 40 degrees. In this embodiment, by setting the guide structure 21, the second pipe section 2 in the threaded pipe can easily extend into the inner hole of the bushing during the assembly process, which facilitates alignment and assembly, thereby improving assembly efficiency.

[0060] The aforementioned threaded pipe, by adding a second pipe section 2, can significantly improve the overall shear strength of the threaded pipe and its mating threaded fasteners. The longer internal threaded hole 5 ensures sufficient fastening strength between the threaded fasteners and the threaded pipe. The multiple protrusions 32 and the size of the protrusions 32 ensure the welding strength between the threaded pipe and the vehicle body. In summary, the aforementioned threaded pipe can provide high shear strength, fastening strength, and welding strength.

[0061] Collision tests were conducted on vehicles comprising the aforementioned threaded tube and its mating threaded fasteners. The test results showed that the threaded tube and its mating threaded fasteners exhibited good overall shear resistance, and the threaded tube effectively protected the mating threaded fasteners, which did not break during the collision tests. Furthermore, durability tests verified that the weldability of the threaded tube to the vehicle body and its tightening performance with the threaded fasteners did not significantly decrease after durability testing.

[0062] This application also provides a vehicle including the aforementioned threaded pipe. The vehicle can be a sedan, commercial vehicle, SUV, SUV, etc. The vehicle can be a pure electric vehicle, a gasoline-powered vehicle, a hybrid vehicle, etc.

[0063] This threaded pipe is suitable for fastening locations on automotive chassis where high requirements are placed on welding strength, fastening strength, and shear strength. Examples include fastening locations where the subframe is connected to the vehicle body.

[0064] The vehicle also includes a body and a subframe. A fixed portion 3 in the threaded tube is welded to the body. A first tube segment 1 is located above the fixed portion 3, and a second tube segment 2 is located below the fixed portion 3. The body has a through hole, and the subframe has a bushing with an inner bore. The second tube segment 2 passes through the through hole in the body and extends into the inner bore of the bushing. Along the axial direction of the threaded tube, the length of the second tube segment 2 can be less than the total length of the through hole and the inner bore of the bushing. A threaded fastener passes through the inner bore of the bushing and is threaded into the internal threaded hole 5 of the threaded tube.

[0065] When connecting the vehicle body and subframe using threaded pipes and threaded fasteners, the second pipe section 2 can first be passed through the through hole in the vehicle body, and the fixing part 3 in the threaded pipe can be projected onto the vehicle body using projection welding equipment. Then, the second pipe section 2 can be inserted into the inner hole of the bushing. After that, the threaded fastener can be passed through the inner hole of the bushing and threadedly connected to the inner threaded hole 5 of the threaded pipe. Finally, the threaded fastener can be tightened using a tightening device according to the torque requirements to achieve the connection between the vehicle body and the subframe.

[0066] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0068] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A threaded pipe, characterized in that, It includes a first pipe segment, a fixing part connected to a first end of the first pipe segment, and a second pipe segment connected to the fixing part at an end away from the first pipe segment; The threaded pipe has an internal threaded hole in the direction from the second pipe segment to the first pipe segment. The internal threaded hole passes through the second pipe segment and the fixing part, and extends to the second end of the first pipe segment.

2. The threaded pipe according to claim 1, characterized in that, The second end of the first pipe section is closed, making the internal threaded hole a blind hole.

3. The threaded pipe according to claim 2, characterized in that, The threaded pipe further includes a platform stage, which is connected to the second end of the first pipe segment. The outer diameter of the platform stage is smaller than the outer diameter of the first pipe segment, and the surface of the platform stage facing away from the first pipe segment is a plane.

4. The threaded pipe according to claim 3, characterized in that, The threaded tube also has a process blind hole, which is at least partially located in the stage, and the axis of the process blind hole is on the same straight line as the axis of the internal threaded hole.

5. The threaded pipe according to claim 1, characterized in that, The first pipe section is connected to the fixed part through a transition section, the transition section having a tapered surface; From the first pipe segment to the second pipe segment, the outer diameter of the transition section gradually increases.

6. The threaded pipe according to any one of claims 1 to 5, characterized in that, The fixing part includes a disc body and a plurality of protrusions, the plurality of protrusions being disposed on the surface of the disc body opposite to the first pipe section.

7. The threaded pipe according to claim 1, characterized in that, The length of the internal threaded hole is greater than or equal to 40 mm and less than or equal to 80 mm.

8. The threaded pipe according to claim 1, characterized in that, The difference between the outer diameter of the second pipe section and the diameter of the internal threaded hole is greater than or equal to 6 mm.

9. The threaded pipe according to claim 1, characterized in that, The second pipe section has a guide structure at the end opposite to the fixed part.

10. A vehicle, characterized in that, Includes the threaded pipe as described in any one of claims 1 to 9.

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