Large-flat-head cylindrical high-step rivet nut

Abstract

The utility model discloses a large flat head cylinder high step rivet nut, which relates to the technical field of riveting and comprises a cap body, the upper end of the cap body is sequentially provided with a high step part, a deformation part, an expansion part and a guide part, and the cap body, the high step part, the deformation part, the expansion part and the guide part are integrally formed to form a rivet nut body together. A second channel and a first channel are formed in the inner side of the rivet nut body from top to bottom, the inner diameter of the second channel is smaller than that of the first channel, an internal thread part is arranged on the inner side of the second channel, and the diameter of the high step part is larger than that of the deformation part. Compared with the prior art, the fixing mode that a certain distance is reserved between two layers of plates due to the fact that a traditional rivet nut, sleeve and bolt three-piece type connection is adopted is simplified, assembling steps and the number of parts are reduced, production cost can be reduced, meanwhile, loose transition assembling parts can be avoided, and more stable connection is provided.

Description

Technical Field

[0001] This utility model relates to the field of riveting technology, specifically to a large flat-head cylindrical high-step rivet nut. Background Technology

[0002] A rivet nut is a fastener used to provide an internal threaded connection, typically used on thin-walled materials. It allows for assembly and fastening by bolts or screws, combining the functions of riveting and nuts. It can be quickly installed using special riveting tools and is widely used in the automotive, aerospace, home appliance, and electromechanical equipment industries.

[0003] If a certain distance is required to fix two conventional plates, rivet nuts must be used first, followed by a combination of sleeves and bolts. This assembly process is time-consuming and complex. In addition, due to the use of multiple parts for connection, there may be problems such as bolts loosening or sleeves not being secure during long-term use, leading to connection instability. To address these issues, a large flat-head cylindrical high-step rivet nut is proposed to solve the problems mentioned above. Utility Model Content

[0004] To solve the above-mentioned technical problems, a large flat-head cylindrical high-step rivet nut is provided. This technical solution solves the problem mentioned in the background technology that if a certain distance is required between two conventional plates, it is necessary to first use rivet nuts to fix them, and then combine sleeves and bolts to fix them. The assembly time is long and the complexity is high. At the same time, due to the use of multiple parts connection, there may be problems such as bolt loosening or sleeve insecurity during long-term use, which may lead to connection instability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A large flat-head cylindrical high-step rivet nut includes a cap body. The upper end of the cap body is sequentially provided with a high-step portion, a deformation portion, an expansion portion, and a guide portion. The cap body, the high-step portion, the deformation portion, the expansion portion, and the guide portion are integrally formed to form the rivet nut body. The inner side of the rivet nut body has a second channel and a first channel from top to bottom. The inner diameter of the second channel is smaller than the inner diameter of the first channel. The inner side of the second channel has an internal thread portion. The diameter of the high-step portion is larger than the diameter of the deformation portion. A limiting step is formed between the high-step portion and the deformation portion.

[0007] Preferably, the outer side of the expansion portion is provided with a plurality of evenly distributed vertical ribs.

[0008] Preferably, the connection between the cap body and the high step portion adopts a smooth transition.

[0009] Preferably, the edge of the limiting step is provided with a rounded chamfer.

[0010] Preferably, the connection between the expansion portion and the deformation portion gradually tapers along the direction from the deformation portion to the expansion portion.

[0011] Preferably, the outer surface of the guide portion is smooth and has no sharp angles.

[0012] Preferably, the diameter of the cap body is larger than the diameter of the high step portion, and the lower end of the cap body is a smooth plane.

[0013] The advantages of this utility model compared with the prior art are:

[0014] This solution proposes a large flat-head cylindrical high-step rivet nut, which integrates multiple functional components into one component, simplifying the traditional three-piece connection of rivet nut, sleeve and bolt, and allowing a certain gap between the two plates. This reduces assembly steps and the number of parts, helps to reduce production costs, and avoids loose transition assembly parts, providing a more stable connection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first channel and the second channel in this utility model;

[0017] Figure 3 This is a schematic diagram illustrating the use of this utility model.

[0018] The numbers on the map are:

[0019] 1. Cap body; 2. High step section; 3. Expansion section; 4. Guide section; 5. First channel; 6. Second channel; 7. Internal thread section; 8. Limiting step; 9. Deformation section. Detailed Implementation

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0021] Reference Figures 1-3 As shown, a large flat-head cylindrical high-step rivet nut includes a cap body 1. The upper end of the cap body 1 is sequentially provided with a high-step portion 2, a deformation portion 9, an expansion portion 3, and a guide portion 4. The cap body 1, the high-step portion 2, the deformation portion 9, the expansion portion 3, and the guide portion 4 are integrally formed to form the rivet nut body. The inner side of the rivet nut body is provided with a second channel 6 and a first channel 5 from top to bottom. The inner diameter of the second channel 6 is smaller than the inner diameter of the first channel 5. The inner side of the second channel 6 is provided with an internal thread portion 7. The diameter of the high-step portion 2 is larger than the diameter of the deformation portion 9. A limiting step 8 is formed between the high-step portion 2 and the deformation portion 9.

[0022] Furthermore, the outer side of the expansion part 3 is provided with several evenly distributed vertical ribs. The connection between the expansion part 3 and the deformation part 9 gradually tapers along the direction of the deformation part 9 towards the expansion part 3. The expansion part 3 is located below the deformation part 9. When the rivet nut is riveted, the outer side of the expansion part 3 will expand outward, and the deformation part 9 will deform and make close contact with the lower plate. The several evenly distributed vertical ribs on the outer side of the expansion part 3 increase the contact area between the expansion part 3 and the lower plate, and at the same time increase the friction. During the riveting process, when the expansion part 3 expands outward, the ribs can effectively grip the surface of the lower plate to prevent the rivet nut from sliding or loosening. This friction makes the fixation between the expansion part 3 and the lower plate more secure, ensuring the stability of the connection. The gradually tapering design of the expansion part 3 ensures that the expansion part 3 can expand evenly during the riveting process, which helps to reduce the resistance during the expansion process, making the expansion more uniform and stable, thereby improving the riveting efficiency, making the riveting process smoother, and helping to form a stronger fixing force.

[0023] Furthermore, the edge of the limiting step 8 is provided with a rounded chamfer. During the riveting process, the impact force generated will be transmitted to the edge of the lower plate. If the edge of the limiting step 8 is sharp, the contact area will be small, and the local pressure will be very concentrated, which will easily lead to damage or deformation of the surface of the lower plate. The rounded chamfer can increase the contact area, make the force distribution more uniform, reduce the pressure concentration, and thus reduce the damage to the lower plate.

[0024] Furthermore, the outer surface of the guide part 4 is smooth and without sharp corners. The guide part 4 is located on the top of the rivet nut. Its smooth outer surface and lack of sharp corners design can easily guide the positioning and operation of the riveting tool and reduce damage to the parts during the riveting process.

[0025] Furthermore, the connection between the cap body 1 and the high step 2 adopts a smooth transition. The diameter of the cap body 1 is larger than the diameter of the high step 2, and the lower end of the cap body 1 is a smooth plane. The smooth plane design at the lower end of the cap body 1 can better fit with the upper plate, thereby improving the stability of the support. During the stress process, sharp transition angles can easily lead to stress concentration, which may cause cracks or fatigue fractures. Through the smooth transition at the connection between the cap body 1 and the high step 2, the pressure can be evenly distributed, thereby significantly reducing the risk of damage caused by stress concentration and enhancing the long-term durability and stability of the parts.

[0026] Reference Figure 3As shown, after the rivet nut body is riveted to the lower plate, the high step 2 can act as a fixing sleeve to provide support, leaving a gap between the upper and lower plates. The rivet nut body alone can achieve the effect of leaving a gap between the upper and lower plates by using the rivet nut, sleeve and bolt together in the traditional way, which makes the assembly of the two plates simpler and avoids the problems of bolt loosening or sleeve insecurity that may occur in long-term use when using multiple parts.

[0027] Working principle: When in use, insert the rivet nut body into the connecting hole on the lower plate. At this time, the high step 2 of the rivet nut contacts the lower plate. Then, insert the riveting tool into the second channel 6. Through the rotation of the riveting tool and the interaction of the internal thread 7, the expansion part 3 of the rivet nut will begin to expand outward, and at the same time, the deformation part 9 will deform, so that the lower plate and the rivet nut are in close contact. The rivet nut body can support the upper plate through its cap 1, and the high step 2 can maintain a certain distance between the upper plate and the lower plate. The rivet nut body alone can achieve the purpose of leaving a gap between the upper plate and the lower plate by using the traditional connection method of rivet nut, sleeve and bolt, simplifying the assembly process of the upper plate and the lower plate.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A large flat-head cylindrical high-step rivet nut, characterized in that, The rivet nut body includes a cap body (1). The upper end of the cap body (1) is provided with a high step part (2), a deformation part (9), an expansion part (3) and a guide part (4) in sequence. The cap body (1), the high step part (2), the deformation part (9), the expansion part (3) and the guide part (4) are integrally formed to form the rivet nut body. The inner side of the rivet nut body is provided with a second channel (6) and a first channel (5) from top to bottom. The inner diameter of the second channel (6) is smaller than the inner diameter of the first channel (5). The inner side of the second channel (6) is provided with an internal thread part (7). The diameter of the high step part (2) is larger than the diameter of the deformation part (9). The high step part (2) and the deformation part (9) form a limiting step (8).

2. The large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The outer side of the expansion part (3) is provided with several evenly distributed vertical ribs.

3. The large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The connection between the cap body (1) and the high step part (2) adopts a smooth transition.

4. The large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The edge of the limiting step (8) is provided with a rounded chamfer.

5. A large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The connection between the expansion portion (3) and the deformation portion (9) gradually tapers along the direction from the deformation portion (9) to the expansion portion (3).

6. A large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The outer surface of the guide part (4) is smooth and without sharp angles.

7. The large flat-head cylindrical high-step rivet nut according to claim 1, characterized in that: The diameter of the cap body (1) is larger than the diameter of the high step part (2), and the lower end of the cap body (1) is a smooth plane.

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