Rust-resistant fastener

Abstract

The utility model belongs to the technical field of fasteners, and particularly relates to a corrosion-resistant fastener which comprises a column head, a bolt column is fixedly installed at the bottom of the column head, a nut is installed on the bolt column in a threaded mode, and a protective sleeve is arranged on the column head in a sleeved mode. The two fixing assemblies are both located in the protective sleeve and used for fixing the position of the protective sleeve; a first sliding groove and a first sliding groove are formed in the column head, a first sliding block is slidably installed in the first sliding groove, a plurality of first springs fixed to the inner wall of the first sliding groove are fixedly installed on one side of the first sliding block, a second sliding groove is formed in the first sliding block, and a second sliding block is slidably installed in the second sliding groove. When the whole device is used, personnel can disassemble the column head and the bolt column without tools, operation is convenient and easy, it is guaranteed that the column head cannot be corroded by rainwater, and the service life of the column head is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a corrosion-resistant fastener. Background Art

[0002] Fasteners are a type of mechanical parts widely used in various fields. They are mainly used to connect and fasten two or more parts (or components) to make them a whole. The characteristics of fasteners are that they have a wide variety of varieties and specifications, different performance and uses, and a high degree of standardization, serialization and generalization.

[0003] For example, Chinese patent publication number CN219587947U discloses an automobile anti-loosening fastener, which relates to the field of fastener technology and includes a bolt and a nut sleeved on the bolt, wherein a limiter is provided inside the bolt for braking the nut, and a limit slot is provided on the nut; the limiter includes a limiter rod provided inside the bolt, the limiter rod being rotatably connected to the bolt, and a pull block is fixedly provided at one end of the limiter rod, and a tapered portion is provided at the other end, a first elastic member is sleeved on the outer side of the limiter rod, and a limit tooth is provided on the tapered portion. The utility model, through the provided limiter, can adjust the position of the brake rod by rotating the pull block so that it is aligned with the limit slot on the nut, thereby facilitating the alignment of the brake rod and the limit slot. The nut is limited and braked by fixing the brake rod, thereby improving the tightening effect. The design is easy to install, simple to align, and can limit and brake nuts in different positions, and has a wide range of applications.

[0004] The above patent has the following problems:

[0005] This patent has some drawbacks during use. For example, the stud of the device may rust after prolonged use. As the rust worsens, the stud may crack or even break, which poses a significant threat to the safety of the equipment or structure. Furthermore, the device is difficult to disassemble and install without tools, requiring a high degree of tool dependence and inconvenience. In light of these issues, we propose a rust-resistant fastener. Utility Model Content

[0006] The purpose of the present invention is to provide a corrosion-resistant fastener to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a rust-resistant fastener, comprising:

[0008] A column head, wherein a bolt is fixedly installed at the bottom of the column head, a nut is threadedly installed on the bolt head, and a protective sleeve is provided on the column head;

[0009] Two fixing components, both of which are located in the protective cover and are used to fix the position of the protective cover;

[0010] Sliding groove one, the sliding groove one is opened on the column head, the sliding groove one is slidably installed with a sliding block one, one side of the sliding block one is fixedly installed with a plurality of springs one fixed to the inner wall of the sliding groove one, the sliding groove two is opened in the sliding block one, the sliding groove two is slidably installed with a sliding block two, one side of the sliding block two is fixedly installed with a plurality of springs two fixed to the inner wall of the sliding groove two, the sliding groove three is opened in the sliding block two, the sliding groove three is slidably installed with a sliding block three, one side of the sliding block three is fixedly installed with a plurality of springs three fixed to the inner wall of the sliding groove three;

[0011] A limiting component is located in the column head and is used to limit the position of the sliding block three.

[0012] In the present technical solution, when the stud needs to be rotated without tools, the limiting assembly is provided, and then under the action of the rebound force of the plurality of springs three, the plurality of springs two and the plurality of springs one, the sliding blocks one, two and three all slide in the direction away from the stud. At this time, the person can rotate the sliding blocks three, two and one to drive the stud and the bolt to rotate. Under the action of the thread, the bolt and the nut can be completely disassembled, so that the person can disassemble the stud and the bolt without tools, and the operation is convenient and simple.

[0013] When the disassembly is completed, the personnel push the sliding block 3, the sliding block 2 and the sliding block 1 to slide in the direction of the column head. At the same time, the plurality of springs 3, the plurality of springs 2 and the plurality of springs 1 are squeezed and contracted. When the sliding block 3, the sliding block 2 and the sliding block 1 all slide to the appropriate positions, the sliding block 3 can be limited by the provided limit assembly so that the sliding block 3 cannot slide.

[0014] When the column head needs to be protected, the protective cover is put on the column head. The position of the protective cover can be fixed by the provided fixing component to ensure that the column head will not be eroded by rain water, thereby extending the service life of the column head.

[0015] In the above technical solution, further, the fixing assembly includes:

[0016] Sliding groove four, the sliding groove four is opened in the protective cover, and a limit block is slidably installed in the sliding groove four, one side of the limit block passes through the sliding groove four and extends into the column head, and one side of the limit block is plugged into the column head, and a pull rod is fixedly installed on the other side of the limit block, one end of the pull rod passes through the sliding groove four and extends to the outside, the pull rod is slidably connected to the sliding groove four, and a spring five is provided on the pull rod.

[0017] In the present technical solution, when the column head needs to be rotated without tools, the limiting plate is first pulled downward, and at the same time, the plurality of springs four are squeezed and contracted. Subsequently, under the action of the rebound force of the plurality of springs three, the plurality of springs two and the plurality of springs one, the sliding block one, the sliding block two and the sliding block three all slide in the direction away from the column head. At this time, the person can rotate the sliding block three, the sliding block two and the sliding block one to drive the column head and the bolt to rotate. Under the action of the thread, the bolt head and the nut can be completely disassembled, so that the person can disassemble the column head and the bolt head without tools, and the operation is convenient and simple.

[0018] When the disassembly is completed, the personnel push the sliding block three, the sliding block two and the sliding block one to slide in the direction of the column head. At the same time, the springs three, the springs two and the springs one are squeezed and contracted. When the sliding block three, the sliding block two and the sliding block one slide to the appropriate position, under the action of the rebound force of the spring four, the limit plate slides upward, and then the limit plate is in close contact with the sliding block three. The limit plate can limit the sliding block three, so that the sliding block three cannot slide.

[0019] In the above technical solution, further, the limiting component includes:

[0020] A limit plate is slidably installed in the sliding groove one and is located on one side of the sliding block three. The limit plate is in close contact with the sliding block three. The bottom of the limit plate is fixedly installed with a plurality of springs four fixed to the inner wall of the sliding groove one.

[0021] In this technical solution, when the column head needs to be protected, first pull the two pull rods to slide and move away from each other, and the two pull rods respectively drive the two limit blocks to slide and move away from each other. At the same time, the two springs five are squeezed and contracted. When the two limit blocks slide to the appropriate position, the personnel can put the protective cover on the column head, and then loosen the two pull rods. Under the action of the rebound force of the two springs five, the two limit blocks slide and move closer to each other, and the two limit blocks respectively drive the two pull rods to slide and move closer to each other. Then the two limit blocks are inserted into the column head, which can fix the position of the protective cover, ensure that the column head will not be eroded by rainwater, and extend the service life of the column head.

[0022] In the above technical solution, further, a sealing rubber layer is fixedly installed on the inner wall of the protective sleeve.

[0023] In the present technical solution, the provision of a sealing rubber layer can ensure that the column head will not be eroded by rainwater, thereby extending the service life of the column head.

[0024] In the above technical solution, further, the cross-section of the pull rod is T-shaped.

[0025] In this technical solution, it is convenient for people to pull the pull rod.

[0026] In the above technical solution, further, both ends of the spring five are respectively welded to one side of the corresponding limit block and the inner wall of the corresponding sliding groove four.

[0027] In this technical solution, the stability of the two springs five during use is ensured.

[0028] In the above technical solution, further, the limit block and the corresponding pull rod are an integrally formed structure.

[0029] In this technical solution, the stability of the limit block and the pull rod during use is ensured.

[0030] The beneficial effects of the utility model are:

[0031] 1. The rust-resistant fastener is provided with a limit assembly. Subsequently, under the action of the rebound force of the plurality of springs three, the plurality of springs two and the plurality of springs one, the sliding blocks one, the sliding blocks two and the sliding blocks three all slide in the direction away from the column head. At this time, the personnel can rotate the sliding blocks three, the sliding blocks two and the sliding blocks one to drive the column head and the bolt to rotate. Under the action of the thread, the bolt head and the nut can be completely disassembled, so that the personnel can also disassemble the column head and the bolt head without tools, and the operation is convenient and simple.

[0032] 2. When the column head needs to be protected, the rust-resistant fastener can put the protective cover on the column head. The position of the protective cover can be fixed by the provided fixing assembly to ensure that the column head will not be corroded by rainwater, thereby extending the service life of the column head. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0034] Figure 2 It is a schematic structural diagram of the column head area of ​​the utility model;

[0035] Figure 3 This is one of the schematic diagrams of the second area structure of the sliding block of the utility model;

[0036] Figure 4 This is the second schematic diagram of the structure of the sliding block area 2 of the utility model;

[0037] Figure 5 This is a schematic diagram of the cross-sectional structure of the protective cover of the utility model;

[0038] Figure 6 This utility model Figure 5 Schematic diagram of the structure enlarged at point A.

[0039] The marks in the figure are:

[0040] 1. Column head; 2. Bolt; 3. Nut; 4. Sliding slot one; 5. Sliding block one; 6. Spring one; 7. Sliding slot two; 8. Sliding block two; 9. Spring two; 10. Sliding slot three; 11. Sliding block three; 12. Spring three; 13. Protective cover; 14. Limit plate; 15. Spring four; 16. Sliding slot four; 17. Limit block; 18. Pull rod; 19. Spring five. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of this application.

[0042] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0043] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0044] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0045] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0046] Example 1:

[0047] See also Figure 1 - Figure 6 As shown, this embodiment provides a corrosion-resistant fastener, comprising:

[0048] The column head 1 has a bolt 2 fixedly mounted on its bottom, a nut 3 threadedly mounted on the bolt 2, and a protective sleeve 13 sleeved on the column head 1;

[0049] Two fixing components, both of which are located in the protective cover 13 and are used to fix the position of the protective cover 13;

[0050] A sliding groove 4 is provided on the column head 1. A sliding block 5 is slidably installed in the sliding groove 4. One side of the sliding block 5 is fixedly installed with a plurality of springs 6 fixed to the inner wall of the sliding groove 4. A sliding groove 27 is provided in the sliding block 5. A sliding block 28 is slidably installed in the sliding groove 27. One side of the sliding block 28 is fixedly installed with a plurality of springs 29 fixed to the inner wall of the sliding groove 27. A sliding groove 3 10 is provided in the sliding block 28. A sliding block 3 11 is slidably installed in the sliding groove 3 10. One side of the sliding block 3 11 is fixedly installed with a plurality of springs 3 12 fixed to the inner wall of the sliding groove 3 10.

[0051] The limiting component is located in the column head 1 and is used to limit the position of the sliding block 3 11.

[0052] Among them, when the column head 1 needs to be rotated without tools, through the provided limit assembly, under the action of the rebound force of the plurality of springs 3 12, the plurality of springs 2 9 and the plurality of springs 1 6, the sliding block 1 5, the sliding block 2 8 and the sliding block 3 11 all slide in the direction away from the column head 1. At this time, the person can rotate the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 to drive the column head 1 and the bolt 2 to rotate. Under the action of the thread, the bolt 2 and the nut 3 can be completely disassembled, so that the person can also disassemble the column head 1 and the bolt 2 without tools, and the operation is convenient and simple;

[0053] When the disassembly is completed, the personnel push the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 to slide in the direction of the column head 1. At the same time, the plurality of springs 3 12, the plurality of springs 2 9 and the plurality of springs 1 6 are squeezed and contracted. When the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 slide to the appropriate positions, the limiting assembly provided can limit the sliding block 3 11 so that the sliding block 3 11 cannot slide.

[0054] When the column head 1 needs to be protected, the protective cover 13 is put on the column head 1. The position of the protective cover 13 can be fixed by the provided fixing assembly to ensure that the column head 1 will not be corroded by rainwater, thereby extending the service life of the column head 1.

[0055] In this embodiment, the fixing component includes:

[0056] A fourth sliding groove 16 is provided in the protective cover 13. A limit block 17 is slidably mounted in the fourth sliding groove 16. One side of the limit block 17 passes through the fourth sliding groove 16 and extends into the column head 1. One side of the limit block 17 is plugged into and engaged with the column head 1. A pull rod 18 is fixedly mounted on the other side of the limit block 17. One end of the pull rod 18 passes through the fourth sliding groove 16 and extends to the outside. The pull rod 18 is slidably connected to the fourth sliding groove 16, and a spring 5 19 is sleeved on the pull rod 18.

[0057] Among them, when the column head 1 needs to be rotated without tools, the limiting plate 14 is first pulled downward, and the plurality of springs 4 15 are squeezed and contracted. Then, under the action of the rebound force of the plurality of springs 3 12, the plurality of springs 2 9 and the plurality of springs 1 6, the sliding block 1 5, the sliding block 2 8 and the sliding block 3 11 all slide in the direction away from the column head 1. At this time, the person can rotate the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 to drive the column head 1 and the bolt 2 to rotate. Under the action of the thread, the bolt 2 and the nut 3 can be completely disassembled, so that the person can also disassemble the column head 1 and the bolt 2 without tools, and the operation is convenient and simple.

[0058] When the disassembly is completed, the personnel push the sliding block three 11, the sliding block two 8 and the sliding block one 5 to slide in the direction of the column head 1. At the same time, the springs three 12, the springs two 9 and the springs one 6 are squeezed and contracted. When the sliding block three 11, the sliding block two 8 and the sliding block one 5 all slide to the appropriate positions, under the action of the rebound force of the springs four 15, the limit plate 14 slides upward, and then the limit plate 14 is in close contact with the sliding block three 11. The limit plate 14 can limit the sliding block three 11, so that the sliding block three 11 cannot slide.

[0059] In this embodiment, the limiting component includes:

[0060] A limit plate 14 is slidably mounted in the sliding groove 14 and is located on one side of the sliding block 3 11 . The limit plate 14 is in close contact with the sliding block 3 11 . A plurality of springs 4 15 fixed to the inner wall of the sliding groove 14 are fixed to the bottom of the limit plate 14 .

[0061] Among them, when the column head 1 needs to be protected, first pull the two pull rods 18 to slide and move away from each other. The two pull rods 18 respectively drive the two limit blocks 17 to slide and move away from each other. At the same time, the two springs 5 ​​19 are squeezed and contracted. When the two limit blocks 17 slide to the appropriate position, the personnel can put the protective cover 13 on the column head 1, and then loosen the two pull rods 18. Under the action of the rebound force of the two springs 5 ​​19, the two limit blocks 17 slide and move closer to each other. The two limit blocks 17 respectively drive the two pull rods 18 to slide and move closer to each other. Then the two limit blocks 17 are inserted into the column head 1, which can fix the position of the protective cover 13, ensure that the column head 1 will not be eroded by rainwater, and extend the service life of the column head 1.

[0062] Example 2:

[0063] This embodiment provides a rust-resistant fastener, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0064] In this embodiment, a sealing rubber layer is fixedly mounted on the inner wall of the protective cover 13 .

[0065] The provided sealing rubber layer can ensure that the column head 1 will not be corroded by rainwater, thereby extending the service life of the column head 1.

[0066] Example 3:

[0067] This embodiment provides a rust-resistant fastener, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0068] In this embodiment, the cross section of the pull rod 18 is T-shaped.

[0069] Among them, it is convenient for personnel to pull the pull rod 18.

[0070] Example 4:

[0071] This embodiment provides a rust-resistant fastener, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0072] In this embodiment, both ends of the spring five 19 are welded to one side of the corresponding limit block 17 and the inner wall of the corresponding sliding groove four 16 respectively.

[0073] Among them, the stability of the two springs 5 ​​19 when in use is ensured.

[0074] Example 5:

[0075] This embodiment provides a rust-resistant fastener, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] In this embodiment, the limiting block 17 and the corresponding pull rod 18 are an integrally formed structure.

[0077] The stability of the limit block 17 and the pull rod 18 during use is ensured.

[0078] Working principle: When the column head 1 needs to be rotated without tools, the limiting plate 14 is first pulled downward, and at the same time, the plurality of springs 4 15 are squeezed and contracted. Then, under the action of the rebound force of the plurality of springs 3 12, the plurality of springs 2 9 and the plurality of springs 1 6, the sliding block 1 5, the sliding block 2 8 and the sliding block 3 11 all slide in the direction away from the column head 1. At this time, the person can rotate the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 to drive the column head 1 and the bolt 2 to rotate. Under the action of the thread, the bolt 2 and the nut 3 can be completely disassembled, so that the person can disassemble the column head 1 and the bolt 2 without tools, and the operation is convenient and simple.

[0079] When the disassembly is completed, the personnel push the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 to slide in the direction of the column head 1. At the same time, the plurality of springs 3 12, the plurality of springs 2 9 and the plurality of springs 1 6 are squeezed and contracted. When the sliding block 3 11, the sliding block 2 8 and the sliding block 1 5 all slide to the appropriate position, under the action of the rebound force of the plurality of springs 4 15, the limit plate 14 slides upward, and then the limit plate 14 is in close contact with the sliding block 3 11. The limit plate 14 can limit the sliding block 3 11 so that the sliding block 3 11 cannot slide.

[0080] When the column head 1 needs to be protected, first pull the two pull rods 18 to slide and move away from each other. The two pull rods 18 respectively drive the two limit blocks 17 to slide and move away from each other. At the same time, the two springs 5 ​​19 are squeezed and contracted. When the two limit blocks 17 slide to the appropriate position, the personnel can put the protective cover 13 on the column head 1, and then loosen the two pull rods 18. Under the action of the rebound force of the two springs 5 ​​19, the two limit blocks 17 slide and move closer to each other. The two limit blocks 17 respectively drive the two pull rods 18 to slide and move closer to each other. Then the two limit blocks 17 are inserted into the column head 1, which can fix the position of the protective cover 13. The sealing rubber layer can ensure that the column head 1 will not be eroded by rainwater, thereby extending the service life of the column head 1.

[0081] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A corrosion-resistant fastener, characterized in that: include: A column head (1), a bolt (2) is fixedly mounted on the bottom of the column head (1), a nut (3) is threadedly mounted on the bolt head (2), and a protective sleeve (13) is sleeved on the column head (1); Two fixing components, both of which are located in the protective cover (13) and are used to fix the position of the protective cover (13); Sliding groove one (4), the sliding groove one (4) is provided on the column head (1), a sliding block one (5) is slidably installed in the sliding groove one (4), a plurality of springs one (6) fixed to the inner wall of the sliding groove one (4) are fixedly installed on one side of the sliding block one (5), a sliding groove two (7) is provided in the sliding block one (5), a sliding block two (8) is slidably installed in the sliding groove two (7), a plurality of springs two (9) fixed to the inner wall of the sliding groove two (7) are fixedly installed on one side of the sliding block two (8), a sliding groove three (10) is provided in the sliding block two (8), a sliding block three (11) is slidably installed in the sliding groove three (10), a plurality of springs three (12) fixed to the inner wall of the sliding groove three (10) are fixedly installed on one side of the sliding block three (11); A limiting component is located in the column head (1) and is used to limit the position of the sliding block three (11).

2. The corrosion-resistant fastener according to claim 1, characterized in that: The fixing assembly includes: Sliding groove four (16), the sliding groove four (16) is opened in the protective cover (13), and a limit block (17) is slidably installed in the sliding groove four (16), one side of the limit block (17) passes through the sliding groove four (16) and extends into the column head (1), and one side of the limit block (17) is plugged into the column head (1), and a pull rod (18) is fixedly installed on the other side of the limit block (17), one end of the pull rod (18) passes through the sliding groove four (16) and extends to the outside, the pull rod (18) is slidably connected to the sliding groove four (16), and a spring five (19) is provided on the pull rod (18).

3. The corrosion-resistant fastener according to claim 2, characterized in that: The limiting component includes: A limit plate (14), wherein the limit plate (14) is slidably mounted in the sliding groove (4) and is located on one side of the sliding block (11), the limit plate (14) is in close contact with the sliding block (11), and a plurality of springs (15) fixed to the inner wall of the sliding groove (4) are fixedly mounted on the bottom of the limit plate (14).

4. The corrosion-resistant fastener according to claim 1, characterized in that: A sealing rubber layer is fixedly mounted on the inner wall of the protective sleeve (13).

5. The corrosion-resistant fastener according to claim 2, characterized in that: The cross section of the pull rod (18) is T-shaped.

6. The corrosion-resistant fastener according to claim 3, characterized in that: The two ends of the spring five (19) are respectively welded to one side of the corresponding limit block (17) and the inner wall of the corresponding sliding groove four (16).

7. The corrosion-resistant fastener according to claim 2, characterized in that: The limiting block (17) and the corresponding pull rod (18) are an integrally formed structure.

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