Embedded self-locking hexagonal nut

Abstract

The utility model discloses an embedded self-locking hexagonal nut belongs to fastener technical field, including nut body and the inner thread of setting in the center. The top of nut body is provided with an annular groove, and the groove side wall is the wavy or sawtooth structure, and the nylon self-locking ring is embedded in the groove, the bottom of nylon self-locking ring is equipped with the anchoring boss, and the outside wall is engaged with the annular groove side wall, and the annular groove bottom is equipped with the recess of accommodating boss. The outer hexagonal edge of nut body is all the fillet structure, and the outer surface is equipped with the corrosion -resistant lubricating coating, and it is convenient for smooth embedding work piece counterbore. The inner diameter of nylon self-locking ring is less than the small diameter of thread, can produce radial locking force when the bolt is spun, realizes the self -locking function of reusable. The utility model discloses reasonable structure, and the installation is convenient, and locks reliably, is applicable to aerospace, car and other high -demand embedded assembly occasion.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a self-locking hexagonal nut suitable for embedded installation. Background Technology

[0002] In fields such as mechanical assembly, aerospace, and automotive manufacturing, nuts, as fundamental fasteners, directly impact the reliability and safety of assembly structures through their locking performance. Traditional self-locking nuts often employ methods such as nylon rings, metal deformation, or chemical adhesives to prevent loosening, but these methods suffer from drawbacks such as non-reusable locking force, high installation resistance, poor corrosion resistance, or unsuitability for embedded installations. Particularly in embedded installations, the nut must smoothly embed into the countersunk hole of the workpiece and maintain a stable locking force. Existing nuts often suffer from installation difficulties or reduced locking effectiveness due to unreasonable structural design. Therefore, there is an urgent need for a self-locking nut that offers reusable locking, convenient installation, strong corrosion resistance, and suitability for embedded installations. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention aims to provide an embedded self-locking hexagonal nut that is easy to install and has good anti-loosening performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An embedded self-locking hexagonal nut includes a nut body and an internal thread located at the center of the nut body. The top of the nut body has an annular groove with a wavy or serrated sidewall. A nylon self-locking ring is embedded within the annular groove. The bottom of the nylon self-locking ring has an anchoring boss, and its outer sidewall forms a complementary structure that engages with the sidewall of the annular groove. The bottom of the annular groove has a recess to accommodate the anchoring boss. The outer hexagonal edges of the nut body are all rounded, and the outer surface of the nut body is coated with a corrosion-resistant lubricating coating. The rounded edges and the lubricating coating cooperate to allow the nut body to smoothly embed into the mounting countersunk hole of the workpiece. The nylon self-locking ring provides a reusable locking force after the nut is embedded.

[0005] Preferably, the inner diameter of the nylon self-locking ring is smaller than the minor diameter of the internal thread.

[0006] Preferably, the nylon self-locking ring is fixed in the annular groove by injection molding or press-fitting.

[0007] Preferably, the radius R of the rounded corner structure is 0.1 mm to 1.0 mm.

[0008] Preferably, the height of the nut body is greater than the width of its parallel opposite sides to accommodate embedded installation.

[0009] This utility model has the following advantages compared with the prior art: 1. The interlocking structure of the nylon self-locking ring and the annular groove, along with the anchoring boss design, ensures that the self-locking ring is firmly embedded, provides reusable locking force, and extends the service life of the nut.

[0010] 2. The outer hexagonal edges adopt a rounded corner structure and are combined with a corrosion-resistant lubricating coating, which significantly reduces installation resistance, avoids scratching the countersunk holes of the workpiece, and improves assembly efficiency and quality.

[0011] 3. The inner diameter of the nylon self-locking ring is smaller than the minor diameter of the thread, which generates uniform radial pressure when the bolt is screwed in, ensuring reliable locking and restoring the locking function after disassembly and assembly.

[0012] 4. The height of the nut body is greater than the width of the opposite side, resulting in a compact structure that is more suitable for embedded installation scenarios, enhancing installation stability and applicability. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 Here is a structural diagram of the nut body; Figure 3 This is a top view; Figure 4 Top view of a nylon self-locking ring; Figure 5 This is a front view of a nylon self-locking ring.

[0014] In the diagram: 1-nut body; 2-internal thread; 3-nylon self-locking ring; 31-anchoring boss; 4-rounded corner structure; 5-annular groove. Detailed Implementation

[0015] The structure and principle of this utility model will now be fully explained with reference to specific embodiments, so that those skilled in the art can fully understand and implement it.

[0016] like Figures 1 to 5 As shown, the present invention discloses an embedded self-locking hexagonal nut, including a nut body 1, an internal thread 2, a nylon self-locking ring 3, a rounded corner structure 4, and an annular groove 5.

[0017] The nut body 1 is hexagonal in shape with an internal thread 2 at its center. An annular groove 5 is machined on the top of the nut body 1, and the sidewalls of the annular groove 5 have a wavy or serrated convex-concave structure (wavy in this embodiment). A nylon self-locking ring 3 is embedded in the annular groove 5, and its bottom has an anchoring boss 31. The shape of its outer sidewall complements and engages with the sidewalls of the annular groove 5. A corresponding recess is provided at the bottom of the annular groove 5 to accommodate the anchoring boss 31, preventing the nylon self-locking ring 3 from falling off or rotating.

[0018] All edges of the outer hexagonal corners of the nut body 1 are machined into rounded corner structures 4, with the radius R preferably being 0.1mm to 1.0mm. The outer surface of the nut body 1 is coated with a corrosion-resistant lubricating coating (such as molybdenum disulfide or PTFE coating). The rounded corner structure 4 and the coating work together to make the nut more smoothly and easily inserted into the countersunk hole of the workpiece.

[0019] The inner diameter of the nylon self-locking ring 3 is smaller than the minor diameter of the internal thread 2, ensuring that the nylon ring is compressed and deformed when the bolt is screwed in, generating a continuous locking force. The nylon self-locking ring 3 can be fixed in the annular groove 5 by injection molding or press-fitting process, ensuring a secure assembly.

[0020] The height of the nut body 1 is designed to be greater than the width of its parallel opposite sides to enhance the stability and torsional resistance of the embedded installation.

[0021] In practice, the nut body 1 can be made of materials such as stainless steel or alloy steel, and undergo heat treatment and surface coating. During installation, due to the rounded corner structure and lubricating coating, the nut insertion process has low resistance and causes no damage to the hole wall. After tightening the bolt, the nylon self-locking ring 3 provides reliable anti-loosening locking force and can be reused after disassembly.

[0022] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the technical principles and scope of this utility model. Therefore, any combination, modification, or substitution made to the disclosed technical features of this utility model based on its technical essence, without departing from the principles or solution of this utility model, should fall within the protection scope of this utility model.

Claims

1. An embedded self-locking hexagonal nut, comprising a nut body (1) and an internal thread (2) disposed at the center of the nut body (1), characterized in that: The top of the nut body (1) has an annular groove (5), the sidewall of the annular groove (5) has a wavy or sawtooth convex-concave structure, and a nylon self-locking ring (3) is embedded in the annular groove; the bottom of the nylon self-locking ring (3) has an anchoring boss (31), the outer sidewall forms a complementary structure that engages with the sidewall of the annular groove (5), and the bottom of the annular groove (5) has a recess to accommodate the anchoring boss (31); the outer hexagonal edges of the nut body (1) are all rounded corner structures (4), and the outer surface of the nut body (1) is provided with a corrosion-resistant lubricating coating; the rounded corner structure (4) cooperates with the lubricating coating to make the nut body (1) smoothly embedded into the mounting countersunk hole of the workpiece; the nylon self-locking ring (3) is used to provide a reusable locking force after the nut is embedded.

2. The embedded self-locking hexagonal nut according to claim 1, characterized in that: The inner diameter of the nylon self-locking ring (3) is smaller than the minor diameter of the internal thread (2).

3. An embedded self-locking hexagonal nut according to claim 1 or 2, characterized in that: The nylon self-locking ring (3) is fixed in the annular groove (5) by injection molding or press-fitting.

4. The embedded self-locking hexagonal nut according to claim 1, characterized in that: The radius R of the rounded corner structure (4) is 0.1 mm to 1.0 mm.

5. An embedded self-locking hexagonal nut according to claim 1, characterized in that: The height of the nut body (1) is greater than the width of its parallel opposite sides to accommodate embedded installation.

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