Anti-rotation insert nut

Abstract

The anti-rotation insert nut comprises a nut body, a nut flange is arranged at one end of the nut body, a plurality of anti-rotation flower teeth are arranged at the end, close to the nut flange, of the nut body, the anti-rotation flower teeth are evenly distributed on the periphery of the nut body at equal intervals, and a center hole penetrating through the nut body and the nut flange along the axis of the nut body is formed in the center of the nut body. And a gasket is arranged on the nut flange. The anti-rotation insert nut is low in installation requirement, rotation can be effectively prevented during follow-up installation of parts, and the influence of sundries on the precision of internal threads is avoided through the gasket.

Description

Technical Field

[0001] This invention relates to the field of fastener technology, and more specifically to an anti-rotation insert nut. Background Technology

[0002] Insert nuts are a type of nut used on aluminum or softer metal materials. They are widely used in automotive, aerospace, rail transportation, refrigeration, furniture, and decoration workpieces. Insert nuts are fixedly connected to workpieces, and their internal threads are used to connect other parts such as bolts.

[0003] However, the outer surface of existing bushings is generally smooth. After they are installed on the workpiece, they are prone to relative rotation with the workpiece, which makes it impossible to obtain reliable functionality. This will affect the assembly of other parts, such as bolts, onto the internal threads of the bushing, thus affecting the normal assembly and use between the bushing and the workpiece. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention proposes an anti-rotation insert nut, which has low installation requirements, can effectively prevent rotation during subsequent installation of parts, and avoids the influence of foreign matter on the accuracy of the internal threads by using a washer.

[0005] To achieve the above objectives, the present invention provides an anti-rotation insert nut, comprising a nut body, a nut flange at one end of the nut body, a plurality of anti-rotation teeth at the end of the nut body near the nut flange, the anti-rotation teeth being evenly distributed at equal intervals on the outer periphery of the nut body, a central hole penetrating the nut body and the nut flange along its axis at the center of the nut body, and a gasket on the nut flange.

[0006] Furthermore, the anti-rotation knives are elongated structures protruding from the surface of the nut body. The cross-section of the anti-rotation knives is trapezoidal. The anti-rotation knives extend along the length of the nut body. One end of the anti-rotation knives is connected to the bottom of the nut flange. The height of the protrusion of the anti-rotation knives is less than the drop between the nut flange and the nut body. The other end of the anti-rotation knives is set as a knives slope, which is inclined in a direction close to the surface of the nut body.

[0007] Furthermore, the nut body includes an inlet section and an anti-rotation section, with anti-rotation teeth set on the anti-rotation section, and the length of the anti-rotation section is no greater than the length of the inlet section.

[0008] Furthermore, a sun tooth is provided between adjacent anti-rotation teeth. The spacing between the sun tooth and the two adjacent anti-rotation teeth is the same. The number of sun teeth is the same as the number of anti-rotation teeth. The sun teeth are set at the bottom of the nut flange and extend on the surface of the nut body in a direction away from the nut flange. The sun teeth are evenly distributed at equal intervals on the outer periphery of the nut body.

[0009] Furthermore, the sun tooth is tetrahedral in shape, with its tip extending in a direction away from the nut body.

[0010] Furthermore, the height of the sun tooth protruding on the surface of the nut body is greater than the height of the anti-rotation tooth protruding, and the height of the sun tooth protruding on the surface of the nut body is less than the height difference between the nut flange and the nut body.

[0011] Furthermore, the nut flange has a receiving groove on the opening at the end away from the nut body, and a gasket is placed in the receiving groove. The inner diameter of the receiving groove is larger than the inner diameter of the central hole. The top of the central hole and the bottom of the receiving groove are connected by a top slope. The sum of the heights of the receiving groove and the top slope is less than the height of the nut flange.

[0012] Furthermore, the thickness of the gasket is no greater than the height of the receiving groove, and the diameter of the gasket is no greater than the inner diameter of the receiving groove.

[0013] Furthermore, the nut flange has several indentations on the side away from the nut body. The indentations are located on the outer periphery of the receiving groove and are evenly distributed at equal intervals on the circumference of the receiving groove. The indentations are connected to the receiving groove.

[0014] Furthermore, the end of the nut body furthest from the nut flange is a guide section, the outer side of which is chamfered, and the center hole has an internal thread.

[0015] The anti-rotation insert nut of the present invention has low installation requirements, can effectively prevent rotation during subsequent installation of parts, and avoids the influence of foreign matter on the accuracy of the internal thread by using a washer. Attached Figure Description

[0016] The invention will now be further described and explained with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of an anti-rotation insert nut at an angle above a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure diagonally below the anti-rotation insert nut.

[0019] Figure 3 This is a cross-sectional view of the anti-rotation insert nut.

[0020] Figure 4 This is a bottom view of the anti-rotation insert nut.

[0021] Figure 5 This is a schematic diagram of the structure of the anti-rotation insert nut after the washer is removed.

[0022] Figure 6 This is a top view of the anti-rotation insert nut.

[0023] Figure 7 This is a schematic diagram of the anti-rotation insert nut of Example 2.

[0024] Reference numerals: 1. Nut body; 11. Center hole; 12. Guide section; 13. Inlet section; 14. Anti-rotation section; 2. Nut flange; 21. Receiving groove; 22. Indentation; 23. Top bevel; 3. Anti-rotation serration; 31. Serration bevel; 4. Sun tooth; 5. Washer. Detailed Implementation

[0025] The technical solution of the present invention will be more clearly and completely explained below with reference to the accompanying drawings and through the description of preferred embodiments of the present invention.

[0026] Example 1: As Figure 1 As shown, a preferred embodiment of the present invention provides an anti-rotation insert nut, which includes a nut body 1, a nut flange 2 at one end of the nut body 1, a guide section 12, an inlet section 13 and an anti-rotation section 14, and the nut flange 2 is connected to the anti-rotation section 14.

[0027] like Figure 2 and Figure 4 As shown, the anti-rotation section 14 has sixteen anti-rotation serrations 3, which are evenly distributed at equal intervals on the outer circumference of the nut body 1. Each anti-rotation serration 3 is a long, strip-shaped structure protruding from the surface of the nut body 1. The cross-section of each anti-rotation serration 3 is trapezoidal, and it extends along the length of the nut body 1. One end of each anti-rotation serration 3 is connected to the bottom of the nut flange 2. The other end of each anti-rotation serration 3 is a serration bevel 31, which is inclined in a direction close to the surface of the nut body 1. The serration bevel 31 guides the anti-rotation insert nut when it is pressed into the round hole of the fitting, making the installation process more convenient.

[0028] The anti-rotation tooth 3 has the same length as the anti-rotation section 14, and the length of the anti-rotation section 14 is no greater than the length of the guide section 13. The anti-rotation tooth 3 is set to a sufficient length to effectively prevent rotation, and the reasonable length setting also helps to avoid material waste and reduce processing difficulty.

[0029] like Figure 2 and Figure 4 As shown, a sun tooth 4 is provided between two adjacent anti-rotation teeth 3. The spacing between the sun tooth 4 and the two adjacent anti-rotation teeth 3 is the same. The number of sun teeth 4 is the same as that of the anti-rotation teeth 3, which is sixteen. The sun teeth 4 are evenly distributed on the outer periphery of the nut body 1.

[0030] like Figure 2 and Figure 4 As shown, the sun tooth 4 is tetrahedral in shape and is located at the bottom of the nut flange 2. One tip of the sun tooth 4 extends on the surface of the nut body 1 in a direction away from the nut flange 2, while the other tip of the sun tooth 4 extends in a direction away from the nut body 1. During installation, the sun tooth 4 is embedded in the surface of the circular hole of the fitting, further enhancing the anti-rotation effect.

[0031] like Figure 2 and Figure 4 As shown, the height of the anti-rotation tooth 3 is less than the height difference between the nut flange 2 and the nut body 1. The height of the sun tooth 4 on the surface of the nut body 1 is greater than the height of the anti-rotation tooth 3. The height of the sun tooth 4 on the surface of the nut body 1 is less than the height difference between the nut flange 2 and the nut body 1.

[0032] like Figure 2 and Figure 3 As shown, the nut body 1 has a central hole 11 that penetrates the nut body 1 and the nut flange 2 along its axis, and the central hole 11 has an internal thread.

[0033] like Figure 5 and Figure 6 As shown, the nut flange 2 has a receiving groove 21 on the opening at the end away from the nut body 1. The inner diameter of the receiving groove 21 is larger than the inner diameter of the central hole 11. The top of the central hole 11 and the bottom of the receiving groove 21 are connected by a top inclined surface 23. The sum of the heights of the receiving groove 21 and the top inclined surface 23 is less than the height of the nut flange 2. A gasket 5 is provided in the receiving groove 21. The thickness of the gasket 5 is not greater than the height of the receiving groove 21, the diameter of the gasket 5 is not greater than the inner diameter of the receiving groove 21, and the diameter of the gasket 5 is greater than the inner diameter of the top of the top inclined surface 23.

[0034] like Figure 5 and Figure 6 The nut flange 2 shown has six recesses 22 on the side away from the nut body 1. The recesses 22 are located on the outer periphery of the receiving groove 21. The six recesses 22 are evenly distributed on the circumference of the receiving groove 21. The cross-section of the recesses 22 is rectangular and the recesses 22 are connected to the receiving groove 21.

[0035] like Figure 3 The outer side of the guide segment 12 shown is chamfered.

[0036] Example 2: As Figure 7 As shown, an anti-rotation insert nut differs from Embodiment 1 in that the sun tooth 4 has been removed.

[0037] In the use of the anti-rotation insert nut of the present invention, only one round hole needs to be machined on the handpiece. The anti-rotation insert nut is pressed into the round hole to complete the installation. During the installation process, the anti-rotation knives 3 are in full contact with the round hole of the handpiece and are squeezed by external force. Under the action of force, the anti-rotation knives 3 are embedded in the handpiece. Therefore, when bolts and other parts are installed on the internal thread of the anti-rotation insert nut later, the anti-rotation insert nut will not rotate, allowing the bolt to be quickly and smoothly locked onto the anti-rotation insert nut. In addition, the gasket 5 can seal the opening of the nut flange 2 before the bolt is installed, effectively preventing dust or other materials from falling into the center hole 11 during secondary processing and affecting the thread accuracy. When installing the bolt, the gasket 5 can be pried open by the indentation 22.

[0038] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications, substitutions, and improvements made by those skilled in the art to the technical solutions of the present invention based on the provided textual description and drawings, without departing from the design concept and spirit of the present invention, should all fall within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A type of anti-rotation insert nut, characterized in that, The nut body includes a nut body, one end of which is provided with a nut flange. The end of the nut body near the nut flange is provided with a plurality of anti-rotation teeth, which are evenly distributed at equal intervals on the outer periphery of the nut body. The center of the nut body is provided with a central hole that penetrates the nut body and the nut flange along its axis. A gasket is provided on the nut flange.

2. The anti-rotation insert nut according to claim 1, characterized in that, The anti-rotation serration is a long strip-shaped structure protruding from the surface of the nut body. The cross-section of the anti-rotation serration is trapezoidal. The anti-rotation serration extends along the length of the nut body. One end of the anti-rotation serration is connected to the bottom of the nut flange. The height of the protrusion of the anti-rotation serration is less than the drop between the nut flange and the nut body. The other end of the anti-rotation serration is set as a serration slope, which is inclined in a direction close to the surface of the nut body.

3. The anti-rotation insert nut according to claim 2, characterized in that, The nut body includes an inlet section and an anti-rotation section. The anti-rotation teeth are arranged on the anti-rotation section, and the length of the anti-rotation section is not greater than the length of the inlet section.

4. The anti-rotation insert nut according to claim 2, characterized in that, A sun tooth is provided between adjacent anti-rotation teeth. The spacing between the sun tooth and the two adjacent anti-rotation teeth is the same. The number of sun teeth is the same as the number of anti-rotation teeth. The sun teeth are located at the bottom of the nut flange and extend on the surface of the nut body in a direction away from the nut flange. The sun teeth are evenly distributed at equal intervals on the outer periphery of the nut body.

5. The anti-rotation insert nut according to claim 4, characterized in that, The sun tooth is tetrahedral in shape, and the tip of the sun tooth extends in a direction away from the nut body.

6. The anti-rotation insert nut according to claim 5, characterized in that, The height of the sun tooth protruding on the surface of the nut body is greater than the height of the anti-rotation tooth protruding, and the height of the sun tooth protruding on the surface of the nut body is less than the height difference between the nut flange and the nut body.

7. The anti-rotation insert nut according to claim 1, characterized in that, The nut flange has a receiving groove on the opening at the end away from the nut body. The gasket is placed in the receiving groove. The inner diameter of the receiving groove is larger than the inner diameter of the central hole. The top of the central hole and the bottom of the receiving groove are connected by a top slope. The sum of the heights of the receiving groove and the top slope is less than the height of the nut flange.

8. The anti-rotation insert nut according to claim 7, characterized in that, The thickness of the gasket is not greater than the height of the receiving groove, and the diameter of the gasket is not greater than the inner diameter of the receiving groove.

9. The anti-rotation insert nut according to claim 1, characterized in that, The nut flange has several indentations on the side away from the nut body. The indentations are located on the outer periphery of the receiving groove and are evenly distributed at equal intervals on the circumference of the receiving groove. The indentations are connected to the receiving groove.

10. The anti-rotation insert nut according to claim 1, characterized in that, The end of the nut body away from the nut flange is a guide section, the outer side of the guide section is chamfered, and the center hole has an internal thread.

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