Welding nut

Abstract

The welding nut is composed of a nut body, a sealing structure and a corrosion-resistant coating, the nut body is unique in shape, the bottom of the nut body is regular hexagonal, the middle of the nut body is cylindrical, the top of the nut body is hemispherical, the sizes of all the parts are set according to specific proportions, threads for fixing are arranged in the nut body, annular grooves and reinforcing rib grooves are formed below the threads, and welding positioning protruding points are arranged at the bottom of the nut body; the sealing structure is a rubber sealing ring which is arranged in the annular groove and can be tightly attached to the contact face to achieve good sealing, the corrosion-resistant coating on the outer layer comprises a zinc coating and an organic corrosion-resistant paint coating, the nut body can be effectively prevented from being corroded, the advantages of the welding nut are remarkable, the nut body is made of high-strength alloy steel, the thread precision is high, operation is convenient due to the hexagonal design, and the service life of the welding nut is prolonged. Sealing is achieved through a sealing ring and sealant, corrosion resistance is achieved through galvanization and painting, in the welding design, the heat stability is improved through convex point positioning, current concentration and reinforcing ribs, and the welding quality is guaranteed.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing, and more particularly to a welding nut. Background Technology

[0002] In many industries such as machinery manufacturing, automotive, and construction engineering, traditional welded nuts are widely used for connecting parts due to their relatively mature manufacturing process. However, with industrial upgrading, their inherent defects are becoming increasingly prominent and urgently need to be addressed.

[0003] First, there is poor sealing. In environments with high sealing requirements, such as automotive engine compartments and chemical equipment, traditional welded nuts can easily lead to liquid or gas leaks due to tiny gaps between the nut and the workpiece after welding. For example, with ordinary welded nuts used in automotive engine fuel systems, fuel vapor can seep from the connection, posing safety hazards, wasting fuel, and affecting engine performance. Leaks in chemical equipment can cause safety accidents and environmental pollution. Second, there is insufficient corrosion resistance. The high temperatures during welding damage the protective layer on the nut's surface. In humid, acidic, or alkaline environments, the nut is prone to rusting, reducing its mechanical strength and lifespan. For example, welded nuts on outdoor steel structures can corrode, causing the structure to loosen and threatening building safety. Finally, welding quality is unstable. Welding quality is affected by factors such as welding current, time, and the cleanliness of the workpiece surface. Improper parameter control can lead to incomplete welds or weld failures. In large-scale production, this results in inconsistent product quality, increased scrap rates and costs, and delayed delivery times. Utility Model Content

[0004] In view of this, this application proposes a welding nut, the structure of which includes a nut body and a sealing structure. The nut body has a regular hexagonal bottom, a cylindrical middle section, and a hemispherical top. The nut body has a first thread for fixing to a workpiece, an annular groove below the first thread, and a reinforcing rib groove between the first thread and the annular groove. The bottom of the nut has welding positioning protrusions. The sealing structure is a rubber sealing ring disposed in the annular groove.

[0005] Preferably, the protrusion is circular in shape, located at the bottom of the nut body, and has the same center as the first thread of the nut body.

[0006] Preferably, there are multiple protrusions, which are spaced apart along the circumferential direction of the nut body.

[0007] Preferably, the nut body includes a reinforcing rib located in a reinforcing rib groove, with its outer diameter side surface positioned lower than its inner diameter side surface. Viewed from a cross-section perpendicular to the reinforcing rib axis, this cross-section is a right-angled triangle, with one right-angled side located radially and connected to the inner diameter side, forming the higher side of the structure; the other right-angled side runs tangentially along the circumference, and the hypotenuse connects from the lower position on the outer diameter side to the higher position on the inner diameter side, resulting in a structure that gradually increases in height from the outer diameter to the inner diameter.

[0008] Preferably, the rubber sealing ring matches the annular groove and is embedded within the annular groove.

[0009] Preferably, the cross-section of the protrusion is an isosceles triangle, and the vertex angle of the cross-section of the protrusion is in the range of 30-60°.

[0010] Preferably, the nut body is made of high-strength alloy steel.

[0011] Preferably, the nut body includes a corrosion-resistant coating located on the outer layer of the nut body, and the corrosion-resistant coating includes an outer zinc coating and an inner organic anti-corrosion paint coating.

[0012] Preferably, the inner ring of the reinforcing rib is provided with a second thread structure.

[0013] Preferably, the rubber sealing ring is made of EPDM rubber.

[0014] Preferably, a hemispherical groove is provided at the top of the first thread, and the radius of the hemispherical groove is the same as the radius of the first thread. The beneficial effects of this invention are:

[0015] The welded nuts developed using this technology feature numerous innovative and optimized advantages. The nut body is made of high-strength alloy steel, offering excellent overall mechanical properties and the ability to withstand strong tightening forces. Its threads are precision-machined for a precise fit with the bolt, greatly enhancing connection reliability. The hexagonal shape conforms to common operating habits, facilitating installation and removal using tools such as wrenches.

[0016] For sealing, an annular sealing groove is provided at the welded end of the nut and the workpiece. An oil-resistant, acid- and alkali-resistant, and high-temperature-resistant EPDM rubber sealing ring is embedded in the groove. Under pressure, it tightly fits the contact surface to achieve a seal. The sealant applied to the threaded part further fills the gap, providing double protection for the sealing effect. In terms of corrosion resistance, a zinc coating is first applied through a hot-dip galvanizing process to isolate air and moisture, playing a sacrificial anode protection role. Then, an organic anti-corrosion paint is sprayed on the zinc coating surface to improve weather resistance and wear resistance.

[0017] In terms of welding design, the nut body is equipped with multiple welding positioning protrusions to accurately position and concentrate the current, ensuring a firm weld; the addition of reinforcing ribs improves thermal stability, reduces deformation caused by welding thermal stress, and ensures stable welding quality.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 This diagram shows the main structure of the nut body device according to an embodiment of this application;

[0021] Figure 2 A structural diagram showing the welding positioning protrusions on the nut body according to an embodiment of this application is provided. Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0026] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0027] This utility model relates to a welding nut, the structure of which includes a nut body 100 and a sealing structure. The nut body 100 has a regular hexagonal bottom, a cylindrical middle section, and a hemispherical top. The nut body 100 has a first thread 101 for fixing to a workpiece, an annular groove 102 below the first thread 101, and a reinforcing rib groove between the first thread 101 and the annular groove 102. The bottom of the nut has welding positioning protrusions 104. The sealing structure is a rubber sealing ring disposed in the annular groove 102. It is used to tightly fit the contact surface between the nut and the workpiece to achieve a good sealing effect.

[0028] In one possible implementation, the protrusion 104 is circular in shape and located at the bottom of the nut body 100, with the same center as the first thread 101.

[0029] In one possible implementation, there are multiple protrusions 104, which are spaced apart along the circumferential direction of the nut body 100.

[0030] In one possible implementation, the nut body 100 includes a reinforcing rib 105 located in the reinforcing rib groove 103, with its outer diameter side surface positioned lower than its inner diameter side surface. Viewed from a cross-section perpendicular to its axis, this cross-section is a right triangle, with one right-angled side located radially and connected to the inner diameter side, forming the higher side of the structure; the other right-angled side runs tangentially along the circumference, and the hypotenuse connects from the lower position on the outer diameter side to the higher position on the inner diameter side, resulting in a structure that gradually increases in height from the outer diameter to the inner diameter.

[0031] In one possible implementation, the rubber sealing ring matches the annular groove 102 and is embedded within the annular groove 102.

[0032] In one possible implementation, the cross-section of the protrusion 104 is an isosceles triangle with a vertex angle ranging from 30 to 60°, used to determine the welding position of the nut and concentrate the welding current.

[0033] In one possible implementation, the nut body 100 is made of high-strength alloy steel.

[0034] In one possible implementation, the nut body 100 includes a corrosion-resistant coating located on the outer layer of the nut body 100, comprising a zinc coating and an organic anti-corrosion paint coating, the corrosion-resistant coating comprising an outer zinc coating and an inner organic anti-corrosion paint coating, for preventing the nut body 100 from being corroded.

[0035] In one possible implementation, the inner ring of the reinforcing rib 105 is provided with a second thread structure.

[0036] In one possible implementation, the rubber sealing ring is made of EPDM rubber.

[0037] In one possible implementation, a hemispherical groove is provided at the top of the first thread, and the radius of the hemispherical groove is the same as the radius of the first thread.

[0038] Figure 1 This diagram shows the main structure of the nut body 100 device according to an embodiment of this application. The nut body 100 has a regular hexagonal bottom, a cylindrical middle section, and a hemispherical top. The radius of the cylinder is 80-85% of the radius of the circumcircle of the regular hexagon, and the radius of the hemispherical shape is 80-85% of the radius of the cylindrical structure. The nut body 100 has a first thread 101 for fixing to a workpiece. Below the first thread 101 is an annular groove 102. A reinforcing rib groove 103 is provided between the first thread 101 and the annular groove 102. A hemispherical groove is provided at the top of the first thread 101, and the radius of the hemispherical groove is the same as the radius of the first thread 101. The bottom of the nut body 100 has a welding positioning protrusion 104. The nut body 100 has a reinforcing rib 105 located in the reinforcing rib groove 103, with its outer diameter side surface positioned lower than its inner diameter side surface. Viewed from a cross-section perpendicular to its axis, the cross-section is a right-angled triangle. One right-angled side is located radially and connects to the inner diameter side, forming the higher side of the structure. The other right-angled side is along the circumferential tangent, and the hypotenuse connects from a lower position on the outer diameter side to a higher position on the inner diameter side, making the entire structure gradually increase in height from the outer diameter to the inner diameter. The inner ring of the reinforcing rib 105 has a second thread structure. The nut body 101 is made of high-strength alloy steel. The reinforcing rib 105 is also made of high-strength alloy steel. The welded nut of this technology has significant advantages in its reinforcing rib and protrusion design. The reinforcing rib improves structural rigidity, enhances thermal stability, reduces deformation caused by welding thermal stress, and ensures consistent welding quality. The protrusions are evenly distributed, accurately positioning the welding position, concentrating the welding current, making the weld stronger, and improving the reliability of the connection between the nut and the workpiece.

[0039] Figure 2This diagram illustrates the structure of the welding positioning protrusions on the nut body according to an embodiment of this application. The welding positioning protrusions 104 have at least two sets, with two protrusions in each set, used to determine the welding position of the nut and concentrate the welding current. The protrusions are isosceles triangles, with the apex angle of the protrusion's cross-section ranging from 30° to 60°. Their height is 1-3 mm.

[0040] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A welding nut, characterized in that, include: Nut body and sealing structure; The nut body has a regular hexagonal bottom, a cylindrical middle, and a hemispherical top. The nut body has a first thread for fixing to the workpiece. There is an annular groove below the first thread. A reinforcing rib groove is provided between the first thread and the annular groove. The bottom of the nut has a welding positioning protrusion. The sealing structure is a rubber sealing ring, which is disposed in the annular groove.

2. The welding nut according to claim 1, characterized in that, The protrusion is circular in shape and located at the bottom of the nut body, with the same center as the first thread of the nut body.

3. The welding nut according to claim 1, characterized in that, The number of protrusions is multiple, and they are spaced apart along the circumferential direction of the nut body.

4. The welding nut according to claim 1, characterized in that, The nut body includes a reinforcing rib inside, which is located in the reinforcing rib groove. The outer diameter side surface of the reinforcing rib is at a lower position than the inner diameter side surface. The cross-sectional shape of the reinforcing rib is a right triangle, with one right-angled side located in the radial direction and connected to the inner diameter side, forming the higher side of the structure; the other right-angled side is along the circumferential tangent direction, and the hypotenuse connects from the lower position of the outer diameter side to the higher position of the inner diameter side, so that the entire structure gradually increases in height from the outer diameter to the inner diameter.

5. The welding nut according to claim 1, characterized in that, The rubber sealing ring matches the annular groove and is embedded in the annular groove.

6. The welding nut according to claim 2, characterized in that, The nut body is made of high-strength alloy steel, and the cross-section of the protrusion is an isosceles triangle with the vertex angle of the protrusion ranging from 30 to 60°.

7. The welding nut according to claim 3, characterized in that, The outer side of the nut body includes a corrosion-resistant coating, which is located on the outer layer of the nut body and includes an outer zinc coating and an inner organic anti-corrosion paint coating.

8. The welding nut according to claim 3, characterized in that, The inner ring of the reinforcing rib is provided with a second thread structure.

9. The welding nut according to claim 4, characterized in that, The rubber sealing ring is made of EPDM rubber.

10. The welding nut according to claim 1, characterized in that, The first thread has a hemispherical groove at the top, and the radius of the hemispherical groove is the same as the radius of the first thread.

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