Anti-loosening nuts

Abstract

This utility model relates to the field of nut technology, specifically an anti-loosening nut. It includes a lower nut and an upper nut, each with a through-hole cavity for screwing in a bolt. The nut cavity has threads around its perimeter. The lower nut has a cylindrical groove in the center of its upper surface, and the upper nut has a cylindrical head that extends into the groove. The cylindrical head fits snugly into the groove. Inside the cylindrical groove is a ring-shaped bladder with a cavity filled with nut adhesive. When the upper nut is screwed in downwards, the cylindrical head compresses and breaks the bladder, allowing the nut adhesive to flow onto the nut threads and the side of the bolt to be installed, thus bonding the nut and bolt together. This design offers superior anti-loosening performance.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, specifically to anti-loosening nuts. Background Technology

[0002] In the installation of electrical equipment and mechanical components, screws (including bolts and nuts) are usually used to ensure the tight connection between some key components and to ensure the safety and reliability of each component. To ensure the tightness of the connection between bolts and nuts, fastening adhesive is usually applied to the external threads of the bolts.

[0003] Patent document CN209856198U, entitled "An Anti-Loosening Nut," discloses an anti-loosening nut consisting of an upper nut and a lower nut. Both the upper and lower nuts have coaxial threaded through holes, and are coaxially and mutually restrictively assembled into a single unit. In use, the lower nut is installed facing downwards. A wrench is used to rotate the outer hexagonal portion of the nut clockwise until it reaches the plane of the assembly, tightening it. Then, the wrench is used to tighten the outer hexagonal portion of the upper nut counterclockwise. At this point, due to the distance between the upper and lower nuts, their threads respectively adhere to the upper and lower surfaces of the screw threads, clamping the screw threads and preventing it from loosening.

[0004] However, such nuts only rely on the distance between the upper and lower nuts, with their threads respectively adhering to the upper and lower surfaces of the screw threads to clamp the screw threads and prevent loosening. They lack other anti-loosening components, resulting in poor anti-loosening effect. In addition, applying fastening glue separately is also troublesome. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned shortcomings by providing an anti-loosening nut that offers better anti-loosening performance and is easier to install.

[0006] The technical solution of this utility model is implemented as follows: an anti-loosening nut, including a lower nut and an upper nut, each having a through-hole cavity between them. The cavity is where the bolt is screwed in, and the inside of the cavity is threaded. The lower nut has a cylindrical groove in the middle of its upper surface, and the upper nut has a cylindrical head that extends into the groove. The cylindrical head and the groove are fitted together. The feature is that there is also an annular bladder inside the cylindrical groove. The bladder has a cavity and is filled with nut adhesive. When the upper nut is screwed in downwards, the cylindrical head squeezes the bladder and causes it to break. The nut adhesive flows onto the nut thread and the side of the bolt to be installed, thus bonding the nut and bolt together.

[0007] Furthermore, an annular gasket is installed inside the cylindrical groove. One side of the gasket has an upwardly curved cross-section. When the gasket is not under pressure, the diameter of the inner ring of the gasket is larger than the diameter of the nut cavity. When the gasket is pressed by the cylindrical head, the curved structure becomes a plane, and the inner ring of the gasket presses against the outer side of the bolt.

[0008] Furthermore, the inner side of the gasket has teeth that, when the gasket is pressed by the cylindrical head, penetrate the side of the bolt to be screwed in.

[0009] Furthermore, there are two pads: an upper pad on top of the bladder and a lower pad below the bladder. The teeth on the upper pad are upper pad teeth, and the teeth on the lower pad are lower pad teeth. The upper pad teeth and the lower pad teeth do not correspond in the vertical direction.

[0010] Furthermore, the gasket has small holes, which are gasket holes.

[0011] The beneficial effect of this utility model is that such an anti-loosening nut has the advantage of better anti-loosening effect. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention after installation.

[0014] Figure 3 This is a top view schematic diagram of the leather bag of this utility model.

[0015] Among them: 1. Lower nut 11. Groove 2. Upper nut 21. Cylindrical head 3. Nut cavity 4. Leather bag 41. Leather bag cavity 5. Gasket 51. Arc structure 52. Tooth 53. Upper gasket 54. Lower gasket 55. Gasket hole. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments.

[0017] like Figure 1 , 2As shown in Figure 3, the anti-loosening nut includes a lower nut 1 and an upper nut 2. The lower nut and the upper nut each have a through-hole nut cavity 3, which is the part where the bolt is screwed in. The inside of the nut cavity is threaded. The upper part of the lower nut has a cylindrical groove 11 in the middle. The lower part of the upper nut has a cylindrical head 21 that extends into the groove. The cylindrical head and the groove are fitted together. The feature is that there is also an annular bladder 4 inside the cylindrical groove. The bladder has a cavity 41 and is filled with nut adhesive. When the upper nut is screwed down, the cylindrical head squeezes the bladder and causes it to break. The nut adhesive flows onto the nut thread and the side of the bolt to be installed, thus bonding the nut and the bolt.

[0018] In this invention, during installation, the lower nut is first screwed into the bolt until it is in place, and then the upper nut is screwed in. The cylindrical head of the upper nut acts on the bladder, rupturing it. The nut adhesive inside the bladder flows onto the nut threads and the side of the bolt to be installed, bonding the nut and bolt together. This achieves a better anti-loosening effect. The nut adhesive is a pre-existing adhesive, eliminating the need for additional adhesive application, and has the advantage of simple operation, thus achieving the purpose of this invention.

[0019] Furthermore, an annular gasket 5 is installed inside the cylindrical groove. The cross-section of one side of the gasket is an upwardly curved arc structure 51. When the gasket is not under pressure, the diameter of the inner ring of the gasket is larger than the diameter of the nut cavity. When the gasket is pressed by the cylindrical head, the arc structure becomes a plane, and the inner ring of the gasket presses against the outer side of the bolt.

[0020] The above-mentioned features of this utility model also include the ability of the inner side of the gasket to act on the thread of the bolt when the gasket is under pressure, which has a better anti-loosening effect.

[0021] Furthermore, the inner side of the gasket has teeth 52, which pierce the side of the bolt to be screwed in when the gasket is pressed by the cylindrical head.

[0022] The above-mentioned features of this utility model also include the ability of the teeth to act on the threads of the bolt when the gasket is under pressure, which provides a better anti-loosening effect.

[0023] Furthermore, there are two pads: an upper pad 53 on top of the bladder and a lower pad 54 below the bladder. The teeth on the upper pad are upper pad teeth, and the teeth on the lower pad are lower pad teeth. The upper pad teeth and the lower pad teeth do not correspond in the vertical direction.

[0024] The above-mentioned features of this utility model, with the two gaskets, provide a better anti-loosening effect.

[0025] Furthermore, the gasket has small holes, which are gasket holes 55.

[0026] The above-mentioned features of this utility model have the following advantages: on the one hand, the arc-shaped structure of the gasket can be transformed into a planar structure under pressure; on the other hand, it facilitates the free flow of adhesive on the nut.

[0027] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within multiple components or the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0029] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An anti-loosening nut, comprising a lower nut and an upper nut, wherein the lower nut and the upper nut each have a through-hole nut cavity, the nut cavity being the part where a bolt is screwed in, and the nut cavity having threads around its perimeter; the lower nut has a cylindrical groove in the center of its upper surface, and the upper nut has a cylindrical head extending into the groove at its lower surface; the cylindrical head and the perimeter of the groove are fitted together, characterized in that: Inside the cylindrical groove is a circular bladder with a cavity filled with nut adhesive. When the upper nut is screwed down, the cylindrical head squeezes the bladder and causes it to break. The nut adhesive flows onto the nut threads and the side of the bolt to be installed, bonding the nut and bolt together.

2. The anti-loosening nut according to claim 1, characterized in that: in A circular gasket is also installed inside the cylindrical groove. The cross-section of one side of the gasket is an upwardly curved arc structure. When the gasket is not under pressure, the diameter of the inner ring of the gasket is larger than the diameter of the nut cavity. When the gasket is pressed by the cylindrical head, the arc structure becomes a plane, and the inner ring of the gasket presses against the outside of the bolt.

3. The anti-loosening nut according to claim 2, characterized in that: The inner side of the gasket has teeth, which pierce the side of the bolt to be screwed in when the gasket is pressed by the cylindrical head.

4. The anti-loosening nut according to claim 3, characterized in that: There are two pads: an upper pad on top of the bladder and a lower pad below the bladder. The teeth on the upper pad are called upper pad teeth, and the teeth on the lower pad are called lower pad teeth. The upper pad teeth and the lower pad teeth do not correspond to each other in the vertical direction.

5. The anti-loosening nut according to claim 3, characterized in that: The gasket has small holes, which are gasket holes.

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