Fastener preassembling assembly

Abstract

The utility model relates to the technical field of mechanical assembly, and provides a fastener preassembling assembly which comprises a nut, a flat gasket, an elastic gasket and an identification connecting piece. The flat gasket is arranged at one end of the nut in the axis direction of the nut, and the flat gasket and the nut are arranged in a spaced mode. The elastic gasket is arranged in a gap between the nut and the flat gasket, and the elastic gasket abuts against the nut and the flat gasket; the nut, the elastic gasket and the flat gasket are sequentially connected and positioned through the mark connecting piece, and the mark connecting piece is provided with a specification prompt mark. According to the invention, the temporary selection and assembly time is reduced, so that the mechanical assembly time is greatly reduced, and the pre-assembly structure does not influence the operation and is easy to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical assembly, in particular to a fastener pre-installed component. Background Art

[0002] Mechanical equipment requires a large number of fasteners such as bolts, nuts, and washers during assembly. Currently, the assembly process requires manual selection of fasteners of the correct specifications, stacking them in sequence, and then tightening them.

[0003] However, the existing fastener assembly method requires a lot of manual operation, which is time-consuming and labor-intensive, and similar fasteners are easily confused, making the assembly process take a long time and increasing the corresponding cost. Utility Model Content

[0004] The utility model provides a fastener pre-assembly component to solve the defects in the prior art that similar fasteners are easily confused during assembly and are time-consuming and laborious, thereby reducing the time for temporary selection and assembly, thereby greatly reducing the assembly time of the machine, and the pre-assembly structure does not affect the operation and is easy to assemble.

[0005] The utility model provides a fastener pre-assembly assembly, comprising:

[0006] Nuts;

[0007] A flat washer, the flat washer is arranged at one end of the nut along the axial direction thereof, and the flat washer is spaced apart from the nut;

[0008] An elastic gasket, wherein the elastic gasket is arranged at the gap between the nut and the flat gasket, and the elastic gasket is respectively arranged in contact with the nut and the flat gasket;

[0009] An identification connector connects and positions the nut, the elastic gasket and the flat gasket in sequence, and the identification connector has a specification prompt mark.

[0010] According to a fastener pre-installation assembly provided by the utility model, the specification prompt mark includes any one of a specification mark font, a specification mark color or a specification mark shape.

[0011] According to a fastener pre-installation assembly provided by the utility model, the identification connector includes a plurality of first elastic arms, which are arranged in a circular array along the axial direction of the fastener pre-installation assembly, the first elastic arms have a first end and a second end that are relatively arranged, a pre-installation portion is formed in a concave manner between the first end and the second end, and the nut, the elastic gasket and the flat gasket are sequentially sheathed on the pre-installation portion in the direction from the first end to the second end.

[0012] According to a fastener pre-assembly assembly provided by the utility model, the first ends of the plurality of first elastic arms are mutually enclosed and connected, and the first elastic arm on the side of the pre-assembly portion close to the first end protrudes radially outward to form a first limiting portion, and the first limiting portion is axially abutted against the nut.

[0013] According to a fastener pre-assembly assembly provided by the utility model, the end portions of the other ends of the plurality of first elastic arms are radially folded outward to form a second limiting portion, and the second limiting portion is axially abutted against the flat gasket.

[0014] According to a fastener pre-assembly assembly provided by the utility model, the identification connector also includes a guide pin, one end of which is connected to the inner side surface of the first end of the first elastic arm, and the other end passes through the cavity surrounded by multiple first elastic arms toward the second end and is a free end.

[0015] According to a fastener pre-assembly assembly provided by the utility model, the identification connector includes a plurality of second elastic arms and an end plate, the plurality of second elastic arms are circumferentially arranged on one side of the end plate, one end of the second elastic arm is connected to the end plate, the other end of the second elastic arm away from the end plate is radially folded outward to form a hook claw portion, and the plurality of second elastic arms are surrounded to form a pre-loading cavity, the nut, the elastic gasket and the flat gasket are arranged in sequence in the pre-loading cavity due to the direction of the end plate toward the hook claw portion, and the hook claw portion is clamped with the flat gasket.

[0016] According to a fastener pre-assembly assembly provided by the utility model, the identification connector is an inner coating, and the inner coating covers the inner sides of the nut, the elastic gasket and the flat gasket, as well as the ends of the nut and the flat gasket away from the elastic gasket.

[0017] According to a fastener pre-assembly assembly provided by the utility model, the identification connector is an outer coating, and the outer coating covers the outer sides of the nut, the elastic gasket and the flat gasket, as well as the ends of the nut and the flat gasket away from the elastic gasket.

[0018] According to a fastener pre-assembly assembly provided by the utility model, when the specification prompt mark is the specification identification color, the fastener pre-assembly assembly includes a plurality of the identification connectors, the identification connectors are adhesive parts, and the adhesive parts are respectively bonded to the nut, between the elastic gaskets and between the flat gaskets and elastic gaskets.

[0019] The utility model provides a fastener pre-assembly, which connects a nut, an elastic gasket and the flat gasket in sequence to form a whole through an identification connector, thereby reducing the time for temporary selection and assembly, thereby greatly reducing the assembly time of the machine; at the same time, by setting a specification prompt mark on the identification connector, the specifications can be distinguished according to different specification prompt marks, thereby avoiding delays in assembly time due to wrong specifications being selected on site, and improving assembly efficiency; the pre-assembly structure does not affect the operation and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the first embodiment of the fastener pre-installation assembly provided by the utility model;

[0022] Figure 2 It is a structural schematic diagram of a second embodiment of a fastener pre-installation assembly provided by the utility model;

[0023] Figure 3 It is a structural schematic diagram of a third embodiment of a fastener pre-installation assembly provided by the utility model;

[0024] Figure 4 It is a structural schematic diagram of a fourth embodiment of a fastener pre-installation assembly provided by the utility model;

[0025] Figure 5 It is a structural schematic diagram of the fifth embodiment of the fastener pre-assembly assembly provided by the utility model.

[0026] Reference numerals:

[0027] 10. Fastener pre-installed components;

[0028] 100. Nut;

[0029] 200, elastic gasket;

[0030] 300, flat gasket;

[0031] 400, identification connector; 410, first elastic arm; 411, first end; 411a, first limiting portion; 412, second end; 412a, second limiting portion; 420, pre-installed portion; 430, guide column; 440, second elastic arm; 441, hook portion; 450, end plate; 460, pre-installed cavity; 470, inner coating; 480, outer coating; 490, adhesive member. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0035] The utility model provides a fastener pre-installation assembly.

[0036] In the embodiment of the present utility model, Figure 1 to Figure 2 As shown, the fastener pre-assembly assembly 10 includes a nut 100, a flat washer 300, an elastic washer 200 and an identification connector 400. The flat washer 300 is arranged at one end of the nut 100 along the axial direction thereof, and the flat washer 300 is spaced apart from the nut 100; the elastic washer 200 is arranged at the gap between the nut 100 and the flat washer 300, and the elastic washer 200 is respectively abutted against the nut 100 and the flat washer 300; the identification connector 400 connects and positions the nut 100, the elastic washer 200 and the flat washer 300 in sequence, and the identification connector 400 has a specification prompt mark.

[0037] It is understandable that the present application is explained by taking the fastener including the nut 100, the elastic gasket 200 and the flat gasket 300 as an example, and other components can be added or replaced with other components as needed in other embodiments, and no special limitation is made here.

[0038] In this embodiment, the nut 100 can be set to different types of nuts 100 as needed, the corresponding elastic gasket 200 and flat gasket 300 can also be changed to corresponding types, and the identification connector 400 will also be changed to the specifications of the appropriate size.

[0039] The identification connector 400 is used to pre-assemble, connect and position the nut 100, elastic gasket 200 and flat gasket 300 according to the installation and assembly habits. At the same time, the identification connector 400 is provided with a specification prompt mark for identifying the corresponding model. When using it, the user can select the appropriate signal for mechanical assembly according to the specification prompt mark recorded on the identification connector 400.

[0040] The utility model provides a fastener pre-assembly, which connects a nut 100, an elastic gasket 200 and a flat gasket 300 in sequence to form a whole through an identification connector 400, thereby reducing the time for temporary selection and assembly, thereby greatly reducing the assembly time of the machine; at the same time, by setting a specification prompt mark on the identification connector 400, the specifications can be distinguished according to different specification prompt marks, thereby avoiding delays in assembly time due to wrong specifications being selected on site, and improving assembly efficiency, and the pre-assembly structure does not affect the operation and is easy to assemble.

[0041] Specifically, the specification prompt mark includes any one of a specification mark font, a specification mark color, or a specification mark shape. It is understandable that the specification mark font is a clear and easy-to-read font to ensure that the operator can quickly identify it. The specification mark color can be a striking color, such as red, blue, or yellow, so that it is easy to identify during the assembly process. Different colors of marks can be used according to the different specifications of the fastener to help distinguish different specifications.

[0042] Specification identification shapes can use different shapes of identification, such as round, square or triangle, to distinguish different specifications. The identification shape of each specification can be explained in the product documentation or manual to help operators correctly identify it.

[0043] By comprehensively considering factors such as fonts, colors and shapes, it is possible to design specification prompts that are easy to identify and distinguish, thereby improving the accuracy and efficiency of assembly. At the same time, these signs should also comply with engineering standards and specifications to ensure product quality and safety.

[0044] Reference Figure 1According to a fastener pre-assembly assembly 10 provided by the utility model, the identification connector 400 includes a plurality of first elastic arms 410, and the plurality of first elastic arms 410 are arranged in a circular array along the axial direction of the fastener pre-assembly assembly 10. The first elastic arm 410 has a first end 411 and a second end 412 that are relatively arranged, and a pre-assembly portion 420 is formed in a concave manner between the first end 411 and the second end 412. The nut 100, the elastic gasket 200 and the flat gasket 300 are sequentially sheathed on the pre-assembly portion 420 in the direction from the first end 411 to the second end 412.

[0045] It is understandable that the first elastic arm 410 can be distinguished by setting the color corresponding to different specifications, or by setting an identification area on the first elastic arm 410 and marking the specification data or pattern on the identification area to distinguish the specifications. In this way, the required parts can be quickly and accurately identified and assembled. The prefabrication of the fasteners by the design of the pre-installation part 420 can ensure that the assembly process of the fasteners is simpler and more reliable, reduce the possibility of incorrect assembly, and improve production efficiency and product quality.

[0046] Reference Figure 1 According to a fastener pre-assembly assembly 10 provided by the utility model, the first ends 411 of multiple first elastic arms 410 are mutually enclosed and connected, and the first elastic arm 410 on one side of the pre-assembly portion 420 close to the first end 411 protrudes radially outward to form a first limiting portion 411a, and the first limiting portion 411a is axially abutted against the nut 100.

[0047] It is understandable that by designing the first limiting portion 411a, the nut 100, elastic gasket 200 and flat gasket 300 pre-installed in the pre-installed portion 420 are limited on one side close to the first end 411, which can improve the assembly accuracy and reliability of the fastener.

[0048] Reference Figure 1 According to a fastener pre-assembly assembly 10 provided by the utility model, the ends of the other ends of the plurality of first elastic arms 410 are radially folded outward to form a second limiting portion 412a, and the second limiting portion 412a is axially abutted against the flat gasket 300.

[0049] Specifically, the second limiting portion 412a is designed mainly to axially limit the flat gasket 300. When the flat gasket 300 is mounted on the pre-installed portion 420, the second limiting portion 412a can abut against the axial surface of the flat gasket 300, thereby limiting the axial movement of the flat gasket 300 in the pre-installed assembly. The stability of the flat gasket 300 during the assembly process is ensured to prevent it from falling off or shifting.

[0050] At the same time, due to the cooperation of the second limiting portion 412a and the first limiting portion 411a, an effective clamping structure for the nut 100 and the flat washer 300 is formed. This clamping structure not only ensures the stability of the position of the nut 100 and the flat washer 300 in the pre-assembled component, but also prevents them from relative movement or dislocation during the assembly process.

[0051] Reference Figure 1 According to a fastener pre-assembly assembly 10 provided by the utility model, the identification connector 400 also includes a guide column 430, one end of which is connected to the inner side surface of the first end 411 of the first elastic arm 410, and the other end passes through the cavity surrounded by multiple first elastic arms 410 toward the second end 412 and is a free end.

[0052] It is understandable that one end of the guide pin 430 is tightly connected to the inner side of the first end 411 of the first elastic arm 410, ensuring the stability of the internal structure of the identification connector 400. The connection method makes the guide pin 430 a reinforced support between the first elastic arms 410, effectively preventing deformation or displacement that may occur during assembly or use. The other end of the guide pin 430 passes through the cavity surrounded by the multiple first elastic arms 410 toward the second end 412 to form a free end. The guide pin 430 forms an operable extension part outside the pre-assembled component.

[0053] During pre-installation, the flat gasket 300, the elastic gasket 200 and the nut 100 are stacked in sequence first, and then the first limiting portion 411a is inserted from the inner hole of the flat gasket 300. When passing through, the first limiting portion 411a is squeezed and deformed, and then passes through the elastic gasket 200 and the nut 100 in sequence until it passes out from the end of the nut 100. The first limiting portion 411a and the second limiting portion 412a of the first elastic arm 410 limit the flat gasket 300, the elastic gasket 200 and the nut 100 on the prefabricated part respectively to form a pre-installed whole. During mechanical assembly, the corresponding bolts are used to support the guide column 430, and then the identification connector 400 is pushed out in the direction of the first limiting position. During the pushing process, the second limiting portion 412a rebounds inward, and finally the entire identification connector 400 leaves the fastener, and the fastener and the bolt can be assembled and tightened.

[0054] Reference Figure 2According to a fastener pre-assembly assembly 10 provided by the utility model, the identification connector 400 includes a plurality of second elastic arms 440 and an end plate 450, the plurality of second elastic arms 440 are arranged around one side of the end plate 450, one end of the second elastic arm 440 is connected to the end plate 450, and the other end of the second elastic arm 440 away from the end plate 450 is radially folded outward to form a hook portion 441, and the plurality of second elastic arms 440 are surrounded to form a pre-installed cavity 460, and the nut 100, the elastic gasket 200 and the flat gasket 300 are arranged in sequence in the pre-installed cavity 460 due to the direction of the end plate 450 toward the hook portion 441, and the hook portion 441 is clamped with the flat gasket 300.

[0055] It is understandable that the identification connector 400 includes a plurality of second elastic arms 440 and an end plate 450. The plurality of second elastic arms 440 are arranged around one side of the end plate 450, forming a surrounding structural layout. The second elastic arms 440 can evenly withstand the pressure from the inside of the pre-assembled component, thereby improving the overall structural strength of the identification connector 400.

[0056] One end of each second elastic arm 440 is connected to the end plate 450, ensuring the stability between the second elastic arm 440 and the end plate 450. The other end of the second elastic arm 440 away from the end plate 450 is radially folded outward to form a hook portion 441. The hook portion 441 can form an effective clamping structure for clamping with the flat gasket 300.

[0057] A plurality of second elastic arms 440 enclose a pre-installed cavity 460, and the nut 100, the elastic gasket 200 and the flat gasket 300 are sequentially arranged in the pre-installed cavity 460 in a specific order (from the end plate 450 to the hook portion 441). This ensures a tight fit between the components and makes the pre-installed assembly more compact and stable in structure.

[0058] During pre-installation, the flat gasket 300, the elastic gasket 200 and the nut 100 are sequentially placed in the identification connector 400, the end plate 450 can block the nut 100, and the hook portion 441 of the second elastic arm 440 can buckle the flat gasket 300, so that the entire structure forms a pre-installed whole. During mechanical assembly, the second elastic arms 440 in four directions reserve a set of planes facing the nut 100 to facilitate fixing with a wrench; when the position of the hook portion 441 contacts the fastened plane, it can be squeezed and expanded outward, so that the screen of the flat gasket 300 can completely contact the installation plane.

[0059] Reference Figure 3 According to a fastener pre-assembly assembly 10 provided by the utility model, the identification connector 400 is an inner coating 470, and the inner coating 470 covers the inner sides of the nut 100, the elastic gasket 200 and the flat gasket 300, as well as the ends of the nut 100 and the flat gasket 300 away from the elastic gasket 200.

[0060] It is understandable that the inner coating 470 can be used as an identification carrier for identifying the connector 400. By printing or marking relevant information, such as specifications, models, etc., on the inner coating 470, the information of the pre-installed components can be easily identified and traced. This identification method is not only intuitive and clear, but also easy to operate, which improves the information management and traceability capabilities during the assembly process. At the same time, the inner coating 470 can also connect the nut 100, the elastic gasket 200, and the flat gasket 300 to form the entire pre-assembled body. The thickness of the inner coating 470 is relatively thin and does not affect the threaded assembly.

[0061] Reference Figure 4 According to a fastener pre-assembly assembly 10 provided by the utility model, the identification connector 400 is an outer coating 480, and the outer coating 480 covers the outer sides of the nut 100, the elastic gasket 200 and the flat gasket 300, as well as the ends of the nut 100 and the flat gasket 300 away from the elastic gasket 200.

[0062] It is understandable that the outer film 480 can also be used as an identification carrier for identifying the connector 400. By printing or marking relevant information, such as specifications, models, etc., on the inner film 470, the information of the pre-installed components can be easily identified and traced. This identification method is not only intuitive and clear, but also easy to operate, which improves the information management and traceability capabilities during the assembly process. At the same time, the outer film 480 can also connect the nut 100, the elastic gasket 200, the flat gasket 300, etc. to form the entire pre-assembled body. The thickness of the outer film 480 is relatively thin and does not affect the threaded assembly.

[0063] Reference Figure 5 According to a fastener pre-assembly assembly 10 provided by the utility model, when the specification prompt mark is the specification identification color, the fastener pre-assembly assembly 10 includes a plurality of identification connectors 400, and the identification connectors 400 are adhesive components 490, and the adhesive components 490 are respectively bonded between the nut 100, the elastic gasket 200, and the flat gasket 300 and the elastic gasket 200.

[0064] It is understandable that when the specification prompt mark is presented in the form of color, the fastener pre-installed component 10 includes a plurality of adhesive parts 490 as the identification connector 400. These adhesive parts 490 are respectively bonded between the nut 100 and the elastic gasket 200, and between the elastic gasket 200 and the flat gasket 300. The tight connection between the components is ensured, and a visual identification effect is provided at the same time. The use of adhesive parts 490 makes the assembly process of the pre-installed component simpler and faster. The operator only needs to stick the adhesive parts 490 between the corresponding components to achieve the rapid assembly of the pre-installed component. This assembly method without the need for additional tools or complicated operations greatly reduces the assembly cost and time. At the same time, by selecting adhesive parts 490 of different colors or types, pre-installed components of different specifications or models can be further distinguished. The operator can intuitively identify the specification information of the pre-installed component, thereby avoiding the possibility of confusion and incorrect assembly.

[0065] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model embodiment. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A fastener pre-assembly assembly, characterized in that: include: Nuts; A flat washer, the flat washer is arranged at one end of the nut along the axial direction thereof, and the flat washer is spaced apart from the nut; An elastic gasket, wherein the elastic gasket is arranged at the gap between the nut and the flat gasket, and the elastic gasket is respectively arranged in contact with the nut and the flat gasket; An identification connector connects and positions the nut, the elastic gasket and the flat gasket in sequence, and the identification connector has a specification prompt mark.

2. The fastener pre-installed assembly according to claim 1, characterized in that: The specification prompt mark includes any one of a specification mark font, a specification mark color or a specification mark shape.

3. The fastener pre-installed assembly according to claim 2, characterized in that: The identification connector includes a plurality of first elastic arms, which are arranged in a circular array along the axial direction of the fastener pre-installation assembly. The first elastic arm has a first end and a second end that are relatively arranged. A pre-installation portion is formed in a concave manner between the first end and the second end. The nut, the elastic gasket and the flat gasket are sequentially sheathed on the pre-installation portion in the direction from the first end to the second end.

4. The fastener pre-assembly assembly according to claim 3, characterized in that: The first ends of the plurality of first elastic arms are mutually enclosed and connected, and the first elastic arm on the side of the pre-installed portion close to the first end protrudes radially outward to form a first limiting portion, and the first limiting portion is axially abutted against the nut.

5. The fastener pre-installation assembly according to claim 4, characterized in that: The ends of the other ends of the plurality of first elastic arms are folded outwardly in the radial direction to form a second limiting portion, and the second limiting portion is axially abutted against the flat gasket.

6. The fastener pre-assembly assembly according to any one of claims 3 to 5, characterized in that: The identification connector also includes a guide pin, one end of which is connected to the inner side of the first end of the first elastic arm, and the other end of which passes through the cavity surrounded by the plurality of first elastic arms toward the second end and is a free end.

7. The fastener pre-installation assembly according to claim 2, characterized in that: The identification connector includes a plurality of second elastic arms and an end plate, wherein the plurality of second elastic arms are arranged around one side of the end plate, one end of the second elastic arm is connected to the end plate, and the other end of the second elastic arm away from the end plate is radially folded outward to form a hook portion, and the plurality of second elastic arms are surrounded to form a pre-installed cavity, and the nut, the elastic gasket and the flat gasket are arranged in sequence in the pre-installed cavity due to the direction of the end plate toward the hook portion, and the hook portion is clamped with the flat gasket.

8. The fastener pre-installation assembly according to claim 2, characterized in that: The identification connector is an inner coating, and the inner coating covers the inner sides of the nut, the elastic gasket and the flat gasket, as well as the ends of the nut and the flat gasket away from the elastic gasket.

9. The fastener pre-installation assembly according to claim 2, characterized in that: The identification connector is an outer coating, and the outer coating covers the outer sides of the nut, the elastic gasket and the flat gasket, as well as the ends of the nut and the flat gasket away from the elastic gasket.

10. The fastener pre-installation assembly according to claim 2, characterized in that: When the specification prompt mark is the specification identification color, the fastener pre-assembly component includes a plurality of the identification connectors, and the identification connectors are adhesive parts, and the adhesive parts are respectively bonded to the nut, between the elastic gaskets, and between the flat gaskets and elastic gaskets.

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