Fastener and vehicle

Abstract

The utility model relates to the technical field of fasteners and discloses a fastener and a vehicle, the fastener comprises a fastener body, a blind hole is formed in the center of the fastener body in the axial direction, and a first internal thread used for being in threaded fit with an external assembly part is formed on the inner circumferential wall of the blind hole; the peripheral wall of the fastener body is coated with an insulating coating through a hot melting spraying process, the face, facing the fastener body, of the insulating coating is a strong adhesion face, and the face, deviating from the fastener body, of the insulating coating is an insulating pressure-resistant face. Compared with a mode of overlapping and combining a locking nut and an injection molding rubber-coated nut in the prior art, the fastener integrating insulation and locking can replace a redundant connecting structure of a combined nut at an important conductive joint position in a vehicle, so that the reliability of the fastener is improved, and the reliability of the fastener is improved. And the integration of single-process assembly, anti-loose locking, insulation and voltage resistance of the product is realized, the manufacturing cost is reduced, and the safety performance is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of fasteners, and in particular relates to a fastener and a vehicle. Background Art

[0002] With the vigorous development of new energy vehicles in China, the number of electrical components inside new energy vehicles has increased, and the risk of electric shock to cabin occupants due to circuit short circuits has increased sharply. The method of using multiple fasteners to assemble conductive joints will cause greater risks and costs in terms of connection performance and actual production costs. For the connection locations of electronic components inside the vehicle (such as the installation points of low-voltage fuse box jumpers), in order to prevent the exposed bolt heads that are conductive at the joints from causing short circuits after a vehicle collision, which may cause electric shock to people in the cabin, locking nuts and injection-molded rubber-coated nuts are usually used in combination to achieve the safety performance requirements of anti-loosening and insulation of the joints. However, this method of using multiple nuts in combination increases the number of fasteners in the entire vehicle, increases the actual manufacturing cost, and increases the risk of collision safety between multiple nuts. Summary of the Invention

[0003] The purpose of the present application is to provide a fastener and a vehicle, wherein the fastener can integrate insulation and locking, thereby reducing manufacturing costs and improving safety performance.

[0004] In order to achieve the above-mentioned purpose, the present application provides a fastener on the one hand, which includes a fastener body, a blind hole is opened axially in the center of the fastener body, and the inner peripheral wall of the blind hole is formed with a first internal thread that cooperates with the thread of the external assembly component. The outer peripheral wall of the fastener body is coated with an insulating coating through a hot melt spraying process, and the side of the insulating coating facing the fastener body is a strong adhesion surface, and the side of the insulating coating facing away from the fastener body is an insulating pressure-resistant surface.

[0005] In some embodiments, one end of the fastener body is closed and the other end is provided with a flange. The flange and the fastener body are integrally formed, and the outer diameter of the flange is larger than the outer diameter of the fastener body. A connecting hole connected to the blind hole is opened in the center of the flange, and the center line of the flange coincides with the center line of the blind hole.

[0006] In some embodiments, the insulating coating wraps around the fastener body from the periphery and avoids the flange, and the thickness of the insulating coating ranges from 0.4 mm to 0.8 mm.

[0007] In some embodiments, the fastener body and the flange are both made of metal.

[0008] In some embodiments, the outer peripheral surface of the fastener body includes a plurality of assembly walls sequentially connected along the circumferential direction, each assembly wall is a flat surface, and the number of the assembly walls is an even number greater than or equal to four.

[0009] In some embodiments, an inner groove recessed toward the inside is formed on the assembly wall surface, and an inner sidewall of the inner groove has a second inner thread that is thread-locked with the external locking member.

[0010] In some embodiments, the plurality of inner grooves are respectively arranged on the assembly wall surfaces that are spaced apart from each other, and the plurality of inner grooves are symmetrically distributed about the central axis of the fastener body.

[0011] In some embodiments, the inner groove on each assembly wall is located at the center of the assembly wall in the height direction, and a center line connecting the plurality of inner grooves is located on the same circumference.

[0012] In some embodiments, the insulating coating is formed by hot melt spraying of non-metallic nylon particles.

[0013] A second aspect of the present application provides a vehicle, comprising a vehicle body and electronic components, wherein the electronic components are connected to the vehicle body via the fasteners described above.

[0014] Through the above technical solution, the fastener provided by the embodiment of the utility model has the following beneficial effects:

[0015] Through technological innovation, this application applies an insulating coating to the outer peripheral wall of the fastener body. The outer peripheral wall of the fastener body is coated with the insulating coating by a hot melt spraying process. The side of the insulating coating facing the fastener body is a strong adhesion surface, so that it can be firmly attached to the outer periphery of the fastener body. The side of the insulating coating facing away from the fastener body is an insulating pressure-resistant surface, which can achieve the safety performance of insulation and pressure resistance. One end of the fastener body is closed, and a blind hole with a first internal thread and an open end is provided along the axis in the center of the fastener body. During use, the locking function can be achieved by tightening the external assembly component with the first internal thread of the blind hole. By adopting this fastener that integrates insulation and locking, this application can replace the redundant connection structure of the combination nut at the important conductive joint position, realize the integration of single-process assembly and product anti-loosening locking, insulation and pressure resistance, reduce manufacturing costs, and improve safety performance.

[0016] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a fastener according to the present application;

[0019] Figure 2 is a schematic front view of a fastener according to the present application;

[0020] Figure 3 Schematic cross-sectional view of the fastener according to the present application.

[0021] Description of Reference Numerals

[0022] 10 Fastener body 13 Assembly wall

[0023] 11 Blind hole 14 Inner groove

[0024] 12 Insulation coating 20 Flange DETAILED DESCRIPTION

[0025] The following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not intended to limit the present application.

[0026] The fastener and the vehicle according to the present application are described below with reference to the accompanying drawings, wherein the fastener may be a nut.

[0027] like Figure 1 The fastener of the present invention is shown as a schematic diagram of the structure of the fastener, which includes a fastener body 10. The overall shape of the fastener body 10 is set to a structure with one end closed. The center of the fastener body 10 is axially opened with a blind hole 11 at one end open. Figure 3 As shown, the inner peripheral wall of the blind hole 11 is formed with a first internal thread that cooperates with the thread for the external assembly component, and the outer peripheral wall of the fastener body 10 is coated with an insulating coating 12 by a hot melt spraying process. The side of the insulating coating 12 facing the fastener body 10 is a strong adhesion surface, which has a strong adhesion ability and can be strongly adhered to the outer peripheral wall of the fastener body 10; the side of the insulating coating 12 facing away from the fastener body is an insulating pressure-resistant surface, which has a pressure-resistant / insulation performance of no arcing and breakdown defects under a voltage environment of 500V (50Hz) and an insulation resistance greater than 10mΩ under a voltage environment of 500V (60s).

[0028] It should be noted that the external assembly component can be a sleeve that is locked with the nut. The distance between the bottom end of the blind hole 11 and the closed end of the fastener body 10 is generally reserved for two thread pitch lengths. The inner diameter of the blind hole 11 is the same as the minor diameter of the first internal thread. The length of the first internal thread in the blind hole 11 can be determined according to the length of the mating bolt, and the adaptation is preferably to ensure that the nut can be tightened to a snug fit.

[0029] This application uses technological innovations such as Figure 3 As shown, an insulating coating 12 is coated on the outer peripheral wall of the fastener body 10, and the insulating coating 12 covers the entire outer periphery of the fastener body 10, which can achieve the safety performance of insulation and voltage resistance. A blind hole 11 with a first internal thread is provided in the fastener body 10. During use, the locking function can be achieved by tightening the external assembly component with the first internal thread of the blind hole 11. The present application uses a fastener that integrates insulation and locking in one design. At important conductive joints, it can replace the redundant connection structure of the combination nut, realize the integration of single-process assembly and product anti-loosening locking, insulation and voltage resistance, improve the collision safety performance of key electronic component installation points, and avoid the risk of electric shock caused by short circuits.

[0030] In some embodiments, one end of the fastener body 10 is closed, and the other end is provided with a flange 20. A connecting hole is defined in the center of the flange 20, communicating with the blind hole 11. The centerline of the flange 20 and the centerline of the blind hole 11 coincide with each other. The connecting hole is defined in the end face of the flange 20. When assembling an external component, the external component is passed through the connecting hole in the flange 20 and into the blind hole 11. During design, the central axis of the connecting hole and the central axis of the blind hole 11 are aligned, ensuring that the axes of the assembled external component are aligned, improving assembly stability and the degree of locking with the fastener.

[0031] To simplify the manufacturing process of the flange 20 and the fastener body 10, the flange 20 and the fastener body 10 can be integrally formed through a die-casting process. Furthermore, the flange 20 is a disc-shaped structure. Since the end of the flange 20 facing away from the fastener body 10 has a mounting surface that needs to overlap with an external assembly component, the outer diameter of the flange 20 needs to be larger than the outer diameter of the fastener body 10. In this embodiment, by configuring the outer end surface of the flange 20 as a flange surface that is tightened with the external part, the overlapping and press-fitting surfaces can be used to reduce the risk of crushing during tightening.

[0032] Since the fastener is used as a whole in the assembly process, and in the vehicle field, collisions between parts are inevitable during the assembly process, in order to improve the safety and stability between the various parts, the fastener body 10 and the flange 20 need to be made of metal.

[0033] Furthermore, the insulating coating 12 completely wraps around the fastener body 10 from its outer periphery. That is, the insulating coating 12 not only coats the outer peripheral sidewalls of the fastener body 10, but also completely coats the upper end surface of the fastener body 10. Furthermore, the insulating coating 12 avoids the upper end surface of the flange 20, so that a certain distance is maintained between the lower end surface of the insulating coating 12 and the upper end surface of the flange 20 to prevent any impact on the flange 20 during the spraying process. Furthermore, the spraying thickness of the insulating coating 12 can be determined based on actual requirements. The spraying thickness should not be too large to affect the assembly of the entire fastener, nor too small to affect the insulation effect. Preferably, the thickness of the insulating coating 12 ranges from 0.4 mm to 0.8 mm. Therefore, on the basis of ensuring good locking and insulation effects, any suitable spraying thickness of the insulating coating 12 is within the scope of protection of this application.

[0034] In some embodiments, as Figure 2 As shown, the outer circumference of the fastener body 10 includes multiple mounting walls 13 connected in sequence along the circumferential direction, each of which is a flat surface. In this embodiment, the multiple mounting walls 13 are integrally formed on the outer circumferential wall of the fastener body 10, and each mounting wall 13 has an identical shape and size. In other words, the multiple mounting walls 13 bisect the outer circumference of the entire fastener body 10, thereby adapting to the shape of the external bolt. In addition, the connection between any two adjacent mounting walls 13 is a broken line, rather than an arc-shaped transition connection, which improves the fit between the mounting walls 13 and the inner circumferential wall of the bolt and prevents them from easily falling off.

[0035] Since the mainstream sleeve that cooperates with the nut on the market is hexagonal, in order to adapt to the mainstream sleeve structure, in a preferred embodiment, the number of assembly walls 13 is also six, and the outer peripheral assembly surface formed by the six assembly walls 13 is an outer hexagonal profile, so that during actual assembly, it can be screwed in and tightened as a driving end wall at the conductive pile head position.

[0036] In some other embodiments, the number of mounting walls 13 is an even number and is at least four. Of course, the number of mounting walls 13 can be determined by the external mounting component, as long as the number of mounting walls 13 and the shape of the external mounting component are compatible. By adapting the peripheral mounting surface formed by the mounting walls 13 to the external mounting component, a stable connection between the two is achieved.

[0037] In some embodiments, as Figure 2 and Figure 3As shown, an inwardly recessed inner groove 14 is defined on the mounting wall 13. This groove 14 does not extend through the entire mounting wall 13. A second internal thread is formed on the inner sidewall of the inner groove 14, which is thread-locked with the external locking member. Multiple inner grooves 14 are arranged on the mounting wall 13 at intervals, symmetrically distributed about the central axis of the fastener body 10. The inner grooves 14 are formed primarily by deforming the corresponding thread at that point, thereby creating an interference fit between the internal and external threads and generating additional locking torque to prevent loosening.

[0038] In this embodiment, multiple inner grooves 14 are respectively arranged on the assembly walls 13 that are spaced apart from each other. It can be understood that when the number of assembly walls 13 is six, the inner grooves 14 are respectively set on the first assembly wall 13, the third assembly wall 13 and the sixth assembly wall; when the number of assembly walls 13 is four, the inner grooves 14 can be respectively set on the first assembly wall 13 and the third assembly wall 13.

[0039] In this embodiment, a plurality of inner grooves 14 are formed on the assembly wall 13. During the assembly process, after the assembly wall 13 is screwed in and tightened, the outer thread of the bolt is threadedly connected to the second inner thread of the inner groove 14, thereby improving the connection stability between the entire fastener and the external assembly component.

[0040] In some embodiments, the inner grooves 14 on each mounting wall 13 are located at the center of the mounting wall 13 along its height, and the center line connecting the multiple inner grooves 14 lies on the same circumference. In other words, the center of each inner groove 14 on the mounting wall 13 is equidistant from the top and bottom of the mounting wall 13. When tightening, the forces acting on the multiple inner grooves 14 can be concentrated on the same circumference, applying force to the outer mounting sleeve from the center, improving the overall loosening effect.

[0041] like Figure 1 As shown, there are six assembly walls 13, and three centrally symmetrical inner grooves 14 are added to the six outer walls. The inner grooves 14 have a second inner thread that cooperates with the external locking member. When the actual bolts are tightened, the interference fit of the inner and outer threads can be strengthened, thereby achieving a metal locking and anti-loosening effect when the threaded pair is connected, and ensuring the long-term stable joint quality of the connection position.

[0042] In some embodiments, the insulating coating 12 is formed by hot-melt spraying of non-metallic nylon particles. Specifically, nylon particles are placed in a spray paint barrel, melted by a high-temperature nozzle, and sprayed onto the surface of the fastener body 10. Preferably, the non-metallic nylon particles can be PA11 nylon particles. As is known to all, since PA11 has high hardness and strong toughness, and has strong adhesion to carbon steel materials after being melted at high temperature, it can have the characteristics of anti-torsion and anti-peeling coating when tightened, ensuring long-term stable anti-corrosion performance; the outer surface of the non-metallic PA11 nylon has a withstand voltage / insulation performance of no arc and breakdown defects under a voltage environment of 500V (50Hz) and an insulation resistance greater than 10mΩ under a voltage environment of 500V (60s). At the connection positions of key electronic components, the risk of short circuit at the conductive joint points is avoided, ensuring the redundancy of vehicle collision safety.

[0043] The second aspect of the present application provides a vehicle, which includes a vehicle body and electronic components, and the electronic components are connected to the vehicle body through the fasteners as described above. Among them, the vehicle of the present application can be a new energy vehicle or an engineering machinery vehicle, both of which are within the scope of protection of the present application. Since the vehicle adopts all the embodiments of the above-mentioned fasteners, it has all the beneficial effects brought about by the above-mentioned fasteners, which will not be described in detail here. By eliminating the combined nut structure and adopting the nut structure that integrates locking and insulation of the present application, a single-process assembly and product performance integration are achieved, and the collision safety redundancy of the conductive joint position of the electronic components is improved.

[0044] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0045] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0047] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fastener, characterized in that: The fastener includes a fastener body, a blind hole is opened in the center of the fastener body along the axial direction, the inner peripheral wall of the blind hole is formed with a first internal thread that cooperates with the thread of the external assembly component, and the outer peripheral wall of the fastener body is coated with an insulating coating by a hot melt spraying process, the side of the insulating coating facing the fastener body is a strong adhesion surface, and the side of the insulating coating facing away from the fastener body is an insulating pressure-resistant surface.

2. The fastener according to claim 1, wherein: One end of the fastener body is closed, and the other end is provided with a flange. The flange and the fastener body are integrally formed, and the outer diameter of the flange is larger than the outer diameter of the fastener body. A connecting hole connected to the blind hole is opened in the center of the flange, and the center line of the flange coincides with the center line of the blind hole.

3. The fastener according to claim 2, wherein: The insulating coating wraps around the fastener body from the periphery and avoids the flange, and the thickness of the insulating coating ranges from 0.4 mm to 0.8 mm.

4. The fastener according to claim 2, wherein: The fastener body and the flange are both made of metal.

5. The fastener according to claim 1, wherein: The outer peripheral surface of the fastener body includes a plurality of assembly walls connected in sequence along the circumferential direction, each of the assembly walls is a flat surface, and the number of the assembly walls is an even number greater than or equal to four.

6. The fastener according to claim 5, wherein: An inner groove recessed toward the inside is formed on the assembly wall surface, and an inner side wall of the inner groove has a second inner thread thread-locked with an external locking member.

7. The fastener according to claim 6, wherein: The plurality of inner grooves are respectively arranged on the assembly wall surfaces spaced apart from each other, and the plurality of inner grooves are symmetrically distributed about the central axis of the fastener body.

8. The fastener according to claim 7, wherein: The inner groove is located at the center of the assembly wall along the height direction, and the center lines of the multiple inner grooves are located on the same circumference.

9. The fastener according to any one of claims 1 to 8, characterized in that The insulating coating is formed by hot-melt spraying of nylon particles.

10. A vehicle, characterized in that: The vehicle includes a vehicle body and electronic components, and the electronic components are connected to the vehicle body via the fastener according to any one of claims 1 to 9.

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