A blind rivet nut structure

Abstract

This utility model discloses a press-fit blind hole nut structure, belonging to the field of press-fit nut technology. It includes a first retainer and a second retainer, a nut component, and a fixing bolt. The fixing bolt is installed at the inner center of the nut component. The nut component includes a toothed sleeve and a nut sleeve. The toothed sleeve is fixedly installed on the upper outer surface of the nut sleeve. A toothed portion for riveting metal plates is provided at the center of the upper outer surface of the toothed sleeve. The toothed portion has an overall toothed ring structure. The fixing bolt and the toothed sleeve, as well as the fixing bolt and the nut sleeve, are all connected by threads. Several sets of teeth are distributed in a ring on the outer surface of the toothed portion, with one end of each tooth having a pointed shape. This provides a press-fit rotation limiting structure, preventing synchronous rotation of the nut during subsequent bolt installation after it is connected to the sheet metal material. This allows the nut and bolt to be tightened to the maximum extent, improving their performance.

Description

Technical Field

[0001] This utility model belongs to the field of press-fit nut technology, specifically a press-fit blind hole nut structure. Background Technology

[0002] A press-fit nut is a fastener that is pressure-embedded into sheet metal or other thin sheet materials, forming a high-strength internal threaded connection point without welding or additional threading. Its typical structure includes a threaded hole and a press-fit flange. During installation, a special press-fit tool deforms the flange to engage with the sheet metal, achieving permanent fixation. Widely used in chassis, electronic equipment, and automotive manufacturing, it offers advantages such as quick installation, strong shock resistance, and no damage to surface finishes. Common materials include carbon steel, stainless steel, and aluminum alloy, meeting varying strength and corrosion resistance requirements.

[0003] The nut riveting head disclosed in patent document CN103659230A includes a limiting sleeve and a riveting body slidably disposed within the limiting sleeve. The limiting sleeve has a transverse limiting strip-shaped through hole, and the lower end of the limiting sleeve has a sleeve interface with the same diameter as the inscribed circle of the nut's cross-section. The riveting body has a transverse connecting through hole, and the limiting strip-shaped through hole and the connecting through hole communicate with each other. A pin is disposed in the connecting through hole, penetrating the limiting sleeve and the riveting body. The upper end of the riveting body has a connecting structure for connecting to a riveting machine, and the lower end of the riveting body has a riveting surface formed by connecting a horizontal section and an inclined section. The riveting surface is an arc-shaped protrusion.

[0004] Existing press-fit nut structures have certain shortcomings in use. Traditional press-fit nuts adopt an integrated structure design, with a press-fit fixing structure at the end of the nut. The nut structure is embedded into sheet metal or other thin plate materials through stamping. During bolt connection and installation, slippage can easily occur between the nut and the sheet metal material, causing the bolt and nut to rotate synchronously during connection, resulting in the bolt not being fully tightened and reducing its effectiveness. Secondly, the integrated structure design increases the difficulty of manufacturing and reduces the flexibility of its installation and use. Utility Model Content

[0005] This utility model provides a dustproof protective cover for an optical screening machine, which can solve the problem in the prior art where slippage easily occurs between the nut and the sheet metal material during bolt connection and installation. This causes the bolt and nut to rotate synchronously during connection, resulting in the bolt not being fully tightened and reducing its performance.

[0006] A press-fit blind hole nut structure includes a nut component and a fixing bolt. The fixing bolt is installed at the inner middle position of the nut component. The nut component includes a toothed sleeve and a nut sleeve. The toothed sleeve is fixedly installed on the upper outer surface of the nut sleeve. The upper outer surface of the toothed sleeve has a toothed part at the middle position for riveting with a metal plate. The toothed part has an overall toothed ring structure. The fixing bolt and the toothed sleeve, as well as the fixing bolt and the nut sleeve, are all connected by threads.

[0007] As a further technical solution of this utility model, the outer surface of the toothed part is provided with a number of sets of teeth in a ring shape. One end of each tooth is a pointed structure. By using a riveting method, the nut and the metal plate can be fixed together, which facilitates the installation of the fixing bolt on the metal plate. The toothed part can form a toothed reinforcement structure when the nut and the metal plate are riveted together, which prevents the fixing bolt from rotating the nut when it is rotated.

[0008] As a further technical solution of this utility model, the upper surface of the tooth head is provided with a beveled part, and the beveled part has an obtuse angle structure. When performing the riveting and fixing operation, the beveled part can reduce the resistance between the toothed part and the metal plate, so that the toothed part can be quickly pressed into the inner side of the metal plate and form a toothed groove structure on the surface of the metal plate.

[0009] As a further technical solution of this utility model, a riveting part is fixedly installed on the upper outer surface of the toothed part. The riveting part has an overall annular outward-turned structure. When fixing the nut and the metal plate, the riveting part of the nut is passed through the blind hole groove of the metal plate. At this time, the toothed part is located on the lower surface of the metal plate, while the riveting part is located on the upper surface of the metal plate. The riveting part is pressed by riveting, so that the riveting part is deformed outward and squeezed, so that the riveting part is riveted and fixed to the upper surface of the metal plate.

[0010] As a further technical solution of this utility model, the outer surface of the riveting part is provided with several sets of V-shaped grooves, which are arranged in a ring. The setting of the V-shaped grooves allows the riveting part to open quickly during the extrusion process, and at the same time, the V-shaped grooves form a limiting and fixing structure to prevent the hexagonal nut from loosening.

[0011] As a further technical solution of this utility model, the upper outer surface of the nut sleeve is provided with a threaded portion, and the outer side of the threaded portion has a threaded structure.

[0012] As a further technical solution of this utility model, the lower part of the toothed sleeve is provided with a threaded sleeve for use with the threaded part. The inner side of the threaded sleeve is provided with a threaded groove. By using the threaded sleeve to connect and fix the threaded part, the combined installation between the toothed sleeve and the nut sleeve can be realized, allowing the toothed sleeve to be produced separately and reducing the processing difficulty of the nut structure.

[0013] As a further technical solution of this utility model, a hexagonal nut is fixedly installed on the outer surface of one end of the fixing bolt. The lower surface of the hexagonal nut is provided with a limiting protrusion that cooperates with the V-shaped groove. When the nut and the fixing bolt are fixed together, the hexagonal nut causes the limiting protrusion to be stuck in the V-shaped groove during rotation.

[0014] As a further technical solution of this utility model, the number of the limiting protrusions is several groups, and the several groups of limiting protrusions are arranged in a ring. The ring-arranged limiting protrusions can be stuck in the ring-arranged V-shaped grooves to improve their fixing effect.

[0015] As a further technical solution of this utility model, the toothed sleeve and the nut sleeve are fixed together by splicing and fixing with threaded sleeve and threaded part.

[0016] The beneficial effects of this utility model are as follows: By setting the toothed part, this utility model provides a riveting rotation limiting structure when the blind hole nut structure is used. After the nut is connected to the sheet metal material, it can prevent the nut from rotating synchronously during subsequent bolt installation, allowing the nut and bolt to be tightened to the maximum extent, thus improving its performance. During operation, the riveting part of the nut is passed through the blind hole groove of the metal plate. At this time, the toothed part is located on the lower surface of the metal plate, while the riveting part is located on the upper surface. The riveting part is pressed by a riveting method, causing the entire riveting part to be outwardly deformed. The riveting part is riveted to the upper surface of the metal plate. During the riveting operation, the beveled part reduces the resistance between the toothed part and the metal plate, allowing the toothed part to be quickly pressed into the inside of the metal plate, forming a toothed groove structure on the surface of the metal plate. The riveting method can fix the nut and the metal plate, facilitating the installation of the fixing bolt on the metal plate. The toothed part can form a toothed reinforcement structure when the nut and the metal plate are riveted, allowing the toothed part to cut into the interior of the metal plate and preventing the fixing bolt from rotating the nut when it is rotated.

[0017] By setting a toothed sleeve and a nut sleeve, the use of the toothed part is optimized when using this press-fit blind hole nut structure. The nut is set as a split structure, which makes the toothed part and the nut sleeve separable, reducing the processing difficulty of the press-fit nut structure and making it applicable to different installation scenarios. The threaded part is fixed by connecting the threaded sleeve, which can realize the combined installation between the toothed sleeve and the nut sleeve. The toothed sleeve can be produced separately, and the split toothed sleeve can be independently press-fitted. After the toothed sleeve is fixed, the toothed sleeve and the nut sleeve are installed and fixed. Secondly, the setting of the V-shaped groove can make the riveted part open quickly during the extrusion process, and at the same time, the V-shaped groove forms a limiting and fixing structure. When the nut and the fixing bolt are fixed, the hexagonal nut makes the limiting protrusion get stuck in the V-shaped groove during rotation, which can prevent the hexagonal nut from loosening. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an overall structural diagram of the nut component in this utility model;

[0021] Figure 3 This is a partial structural diagram of the serrated part in this utility model;

[0022] Figure 4 This is a planar structural diagram of the hexagonal nut in this utility model.

[0023] In the diagram: 1. Hexagonal nut; 2. Nut; 3. Sprocket sleeve; 4. Nut sleeve; 5. Sprocket section; 6. Riveting section; 7. Fixing bolt; 8. Threaded section; 9. Metal plate; 10. Blind hole groove; 11. Threaded sleeve; 12. Beveled section; 13. V-groove; 14. Tooth head; 15. Limiting protrusion. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1-4 As shown, a press-fit blind hole nut structure includes a nut part 2 and a fixing bolt 7. The fixing bolt 7 is installed in the middle of the inner side of the nut part 2. The nut part 2 includes a toothed sleeve 3 and a nut sleeve 4. The toothed sleeve 3 is fixedly installed on the upper outer surface of the nut sleeve 4. The upper outer surface of the toothed sleeve 3 is provided with a toothed part 5 for riveting with a metal plate 9 in the middle position. The toothed part 5 has an overall toothed ring structure. The fixing bolt 7 and the toothed sleeve 3, as well as the fixing bolt 7 and the nut sleeve 4, are all connected by threads.

[0026] The outer surface of the toothed part 5 has several sets of teeth 14 arranged in a ring. One end of the tooth 14 has a pointed structure. By using the riveting method, the nut 2 and the metal plate 9 can be fixed together, which facilitates the installation of the fixing bolt 7 on the metal plate 9. The toothed part 5 can form a toothed reinforcement structure when the nut 2 and the metal plate 9 are riveted together, so as to prevent the fixing bolt 7 from driving the nut 2 to rotate when it is rotated.

[0027] The upper surface of the tooth head 14 is provided with a beveled part 12. The beveled part 12 has an obtuse angle structure. When performing the riveting and fixing operation, the beveled part 12 can reduce the resistance between the toothed part 5 and the metal plate 9, so that the toothed part 5 can be quickly pressed into the inner side of the metal plate 9 to form a toothed groove structure on the surface of the metal plate 9.

[0028] A riveting part 6 is fixedly installed on the upper outer surface of the toothed part 5. The riveting part 6 has an overall annular outward-turned structure. When fixing the nut 2 and the metal plate 9, the riveting part 6 of the nut 2 is passed through the blind hole groove 10 of the metal plate 9. At this time, the toothed part 5 is located on the lower surface of the metal plate 9, while the riveting part 6 is located on the upper surface of the metal plate 9. The riveting part 6 is pressed by riveting, so that the riveting part 6 is deformed outward and pressed, so that the riveting part 6 is riveted and fixed to the upper surface of the metal plate 9.

[0029] The outer surface of the riveting part 6 is provided with several sets of V-shaped grooves 13, which are arranged in a ring. The V-shaped grooves 13 allow the riveting part 6 to open quickly during the extrusion process, and at the same time, the V-shaped grooves 13 form a limiting and fixing structure to prevent the hexagonal nut 1 from loosening.

[0030] The upper outer surface of the nut sleeve 4 is provided with a threaded part 8, and the outer side of the threaded part 8 has a threaded structure.

[0031] The lower part of the toothed sleeve 3 is provided with a threaded sleeve 11 that is used to cooperate with the threaded part 8. The inner side of the threaded sleeve 11 is provided with a threaded groove. By using the threaded sleeve 11 to fix the threaded part 8, the combined installation between the toothed sleeve 3 and the nut sleeve 4 can be realized, allowing the toothed sleeve 3 to be produced separately, reducing the processing difficulty of the nut structure.

[0032] A hexagonal nut 1 is fixedly installed on the outer surface of one end of the fixing bolt 7. The lower surface of the hexagonal nut 1 is provided with a limiting protrusion 15 that is used in conjunction with the V-groove 13. When the nut 2 and the fixing bolt 7 are fixed together, the hexagonal nut 1 causes the limiting protrusion 15 to be stuck in the V-groove 13 during rotation.

[0033] The number of limiting protrusions 15 is several groups, and the groups of limiting protrusions 15 are arranged in a ring. The ring-arranged limiting protrusions 15 can be locked in the ring-arranged V-shaped grooves 13 to improve their fixing effect.

[0034] The toothed sleeve 3 and the nut sleeve 4 are fixed together by splicing the threaded sleeve 11 and the threaded part 8.

[0035] A press-fit blind hole nut structure is provided, which has a press-fit rotation limiting structure. When the nut is mated with the sheet metal material, it can prevent the nut from rotating synchronously during subsequent bolt installation, allowing the nut and bolt to be tightened to the maximum extent and improving its performance. In operation, the riveting part 6 of the nut 2 is passed through the blind hole groove 10 of the metal plate 9. At this time, the toothed part 5 is located on the lower surface of the metal plate 9, while the riveting part 6 is located on the upper surface of the metal plate 9. The riveting part 6 is pressed by pressing, causing the entire riveting part 6 to be outwardly deformed and riveted to the upper surface of the metal plate 9. During the riveting operation, the beveled portion 12 reduces the resistance between the toothed portion 5 and the metal plate 9, allowing the toothed portion 5 to be quickly pressed into the inner side of the metal plate 9, forming a toothed groove structure on the surface of the metal plate 9. The riveting method can fix the nut 2 and the metal plate 9, facilitating the installation of the fixing bolt 7 on the metal plate 9. The toothed portion 5 forms a toothed reinforcement structure when the nut 2 and the metal plate 9 are riveted, allowing the toothed portion 5 to cut into the interior of the metal plate 9, preventing the fixing bolt 7 from rotating the nut 2 during the riveting process.

[0036] By setting the toothed sleeve 3 and the nut sleeve 4, the use of the toothed part 5 is optimized when the press-fit blind hole nut structure is used. The nut is set as a split structure, so that the toothed part 5 and the nut sleeve 4 can be separated, which reduces the processing difficulty of the press-fit nut structure and makes it applicable to different installation scenarios. By using the threaded sleeve 11 to fix the threaded part 8, the combined installation between the toothed sleeve 3 and the nut sleeve 4 can be realized, so that the toothed sleeve 3 can be produced separately. At the same time, the split toothed sleeve 3 can be independently press-fitted. After the toothed sleeve 3 is fixed, the installation and fixation between the toothed sleeve 3 and the nut sleeve 4 are carried out. Secondly, the setting of the V-shaped groove 13 can make the riveting part 6 open quickly during the extrusion process, and at the same time, the V-shaped groove 13 forms a limiting and fixing structure. When the nut part 2 and the fixing bolt 7 are fixed, the hexagonal nut 1 makes the limiting protrusion 15 stuck in the V-shaped groove 13 during the rotation process, which can prevent the hexagonal nut 1 from loosening.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A press-fit blind hole nut structure, characterized in that, The device includes a nut (2) and a fixing bolt (7). The fixing bolt (7) is installed in the middle of the inner side of the nut (2). The nut (2) includes a toothed sleeve (3) and a nut sleeve (4). The toothed sleeve (3) is fixedly installed on the upper outer surface of the nut sleeve (4). The upper outer surface of the toothed sleeve (3) is provided with a toothed part (5) for riveting with a metal plate (9). The toothed part (5) has a toothed ring structure. The fixing bolt (7) and the toothed sleeve (3), as well as the fixing bolt (7) and the nut sleeve (4), are connected by threads.

2. The press-fit blind hole nut structure according to claim 1, characterized in that, The outer surface of the serrated part (5) is provided with a number of sets of teeth (14) arranged in a ring, and one end of each tooth (14) has a pointed structure.

3. The press-fit blind hole nut structure according to claim 2, characterized in that, The upper surface of the tooth (14) is provided with a beveled part (12), and the beveled part (12) has an obtuse angle structure. When performing the riveting and fixing operation.

4. The press-fit blind hole nut structure according to claim 1, characterized in that, A riveting part (6) is fixedly installed on the upper outer surface of the toothed part (5), and the riveting part (6) has an overall annular outward-turned structure.

5. The press-fit blind hole nut structure according to claim 4, characterized in that, The outer surface of the riveting part (6) is provided with several sets of V-shaped grooves (13), which are arranged in a ring.

6. The press-fit blind hole nut structure according to claim 1, characterized in that, The upper outer surface of the nut sleeve (4) is provided with a threaded part (8), and the outer side of the threaded part (8) is a threaded structure.

7. The press-fit blind hole nut structure according to claim 6, characterized in that, The lower part of the toothed sleeve (3) is provided with a threaded sleeve (11) for use with the threaded part (8), and the inner side of the threaded sleeve (11) is provided with a threaded groove.

8. The press-fit blind hole nut structure according to claim 5, characterized in that, A hexagonal nut (1) is fixedly installed on the outer surface of one end of the fixing bolt (7), and the lower surface of the hexagonal nut (1) is provided with a limiting protrusion (15) that is used in conjunction with the V-shaped groove (13).

9. The press-fit blind hole nut structure according to claim 8, characterized in that, The number of the limiting protrusions (15) is several groups, and the several groups of limiting protrusions (15) are distributed in a ring.

10. The press-fit blind hole nut structure according to claim 7, characterized in that, The toothed sleeve (3) and the nut sleeve (4) are fixed together by splicing and fixing with a threaded sleeve (11) and a threaded part (8).

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