CN120819570A

CN120819570A - Nut assembly, anti-loosening stud mechanism and use method thereof

Info

Publication number: CN120819570A
Application number: CN202511077181.2A
Authority: CN
Inventors: 戴肇鹏; 张正义; 陈尤平; 李正道; 黄康; 盛世龙; 陈兴峰
Original assignee: General Designing Institute of Hubei Space Technology Academy
Current assignee: General Designing Institute of Hubei Space Technology Academy
Priority date: 2025-08-01
Filing date: 2025-08-01
Publication date: 2025-10-21

Abstract

The application relates to a nut assembly, an anti-loosening double-end stud mechanism and a using method thereof, and belongs to the technical field of fasteners. The nut comprises a connecting section and a screwing section which are coaxial, wherein a stud connecting screw hole is formed in the connecting section, a locking ring is coaxially arranged in the stud connecting screw hole, the screwing section is a hexagonal cylinder, a hexagonal blind hole is formed in the end face of the hexagonal cylinder, which is far away from one end of the connecting section, the limiting cover comprises a limiting section, a guiding limiting channel for a socket wrench for screwing the nut to pass through is formed in the limiting section, and a mounting flange for being in fit connection with a connected piece is arranged at one end of the limiting section. The application can solve the problems that in the related art, when two structural members are connected by using the stud and the nut in a narrow occasion, the nut is inconvenient to assemble due to lack of guiding and limiting, and the nut is easy to loosen after being installed due to the change of external environment.

Description

Nut assembly, anti-loosening double-end stud mechanism and use method of anti-loosening double-end stud mechanism

Technical Field

The application relates to the technical field of fasteners, in particular to a nut assembly, an anti-loosening double-end stud mechanism and a using method thereof.

Background

At present, in the technical field of structural part connection, screw bolts and nuts are in a common mode. However, when the connected member is subjected to a complex use environment such as long-term vibration, impact, and alternating load, the nut is loosened and fails, which is very likely to cause structural connection failure, and further cause product damage.

In order to ensure that the nut is not loosened, a series of measures are taken in the prior art, such as breaking insurance, screwing double nuts, or adopting a one-time connection mode such as punching riveting to prevent or overhaul, so that the nut cannot loose. However, the conventional nut has a problem of large size, and needs to be operated by a wrench or a socket, which requires enough installation and operation space around the nut, and in some occasions with narrow installation space around the nut and deep operation, particularly the position of the nut socket wrench is difficult to use. In the operation process, when the nut is screwed on the stud, the nut is easy to fall due to lack of guiding and limiting, inconvenience is brought to the assembly of the nut, and the nut is easy to loosen due to the change of the external environment after being installed.

Disclosure of Invention

The embodiment of the application provides a nut assembly, an anti-loosening double-end stud mechanism and a use method thereof, which are used for solving the problems that in the related art, when a double-end stud and a nut are used for connecting two structural members in a narrow space and a deeper occasion, the nut is inconvenient to assemble due to lack of guiding and limiting, and the nut is easy to loosen after being installed due to the change of an external environment.

In a first aspect, embodiments of the present application provide a nut assembly comprising:

The nut comprises a coaxial connecting section and a screwing section, wherein a stud connecting screw hole is formed in the connecting section, and a locking ring is coaxially arranged in the stud connecting screw hole;

The limiting cover comprises a limiting section, a guiding limiting channel for the passage of an inner hexagonal wrench for screwing the nut is arranged in the limiting section, and a mounting flange for being attached to and connected with a connected piece is arranged at one end of the limiting section.

In some embodiments, the anti-loose ring is arranged in a circular ring shape, and a plurality of radial slots are arranged on the inner ring of the anti-loose ring at equal intervals along the circumferential direction.

In some embodiments, the locking rings are axially arranged at intervals along the connecting section, and the locking rings are arranged on the inner ring of the stud connecting screw hole.

In some embodiments, the nut inner wall is provided with an annular groove for clamping the lockwasher.

In some embodiments, the connecting section is far away from one side of the screwing section is provided with a collision section used for collision of the connected piece along the circumferential direction, the collision section is in a circular ring shape, and one side edge of the collision section far away from the screwing section is provided with an arc chamfer.

In some embodiments, the mounting flange is provided with a plurality of through holes for fixing the connected piece, and circular arc-shaped chamfers are arranged around the mounting flange.

In some embodiments, the length of the longest diagonal of the twisting section is less than the diameter of the guiding and limiting channel, the diameter of the outer wall of the connecting section is less than the diameter of the guiding and limiting channel, and the diameter of the outer wall of the abutting section is greater than the diameter of the guiding and limiting channel.

In a second aspect, an embodiment of the present application provides an anti-loosening stud mechanism, including the nut assembly and the stud according to any one of the above embodiments, where the stud is screwed to the nut.

In a third aspect, an embodiment of the present application provides a method for using an anti-loosening stud mechanism, including the following steps:

fixing the double-end stud with a first connected piece, and connecting and fixing a limiting cover with a nut arranged inside with a second connected piece;

abutting the second connected piece with the first connected piece, enabling the stud to pass through the through hole of the second connected piece and prop against the nut;

And clamping the socket spanner on the inner wall of the screwing section of the nut, screwing the nut, and enabling the nut to rotate in the limiting cover so as to connect and fix the first connected piece and the second connected piece.

In a fourth aspect, an embodiment of the present application provides a method for using an anti-loosening stud mechanism, including the following steps:

Fixing a stud with a first connected piece, and butting a second connected piece with the first connected piece so that the stud passes through a through hole of the second connected piece;

the socket spanner is clamped on the outer wall of the screwing section of the nut, and the nut is screwed so as to connect and fix the first connected piece and the second connected piece;

and sleeving the limiting cover on the outer wall of the nut, and fixing the limiting cover on the second connected piece.

The technical scheme provided by the application has the beneficial effects that:

The embodiment of the application provides a nut component, an anti-loosening double-end stud mechanism and a use method thereof; a stud connecting screw hole is formed in the connecting section, and a locking ring is coaxially arranged in the stud connecting screw hole; the screwing section is a hexagonal cylinder, a hexagonal blind hole is formed in the end face, away from one end of the connecting section, of the hexagonal cylinder, the limiting cover comprises a limiting section, a guiding limiting channel for a socket head wrench for screwing the nut to pass through is formed in the limiting section, and a mounting flange used for being in fit connection with the connected piece is arranged at one end of the limiting section.

In practical use, when two structural members are to be connected, the stud is usually connected by using a stud matched nut, the stud is firstly rotated to pass through a threaded hole of a first connected member and then passes through a through hole of a second connected member, and then the nut is screwed so as to tightly connect the two connected members, but the common nut has the problem of larger size, and needs to be operated by means of a spanner or a sleeve, so that the periphery is required to have enough installation and operation space, and in some occasions with smaller installation space, when the nut is screwed onto the stud in the operation process, the nut is easy to fall due to lack of guiding and limiting.

Meanwhile, the screwing section of the nut is a hexagonal cylinder, and the end face of the hexagonal cylinder, which is far away from one end of the connecting section, is provided with a hexagonal blind hole, so that the hexagonal blind hole is arranged, the hexagonal blind hole can be used for more accurately screwing the nut in a narrow space, the nut is conveniently assembled in a narrow space, the screwing section is arranged as the hexagonal cylinder, and the hexagonal wrench can be used for accurately screwing the outer wall or the inner wall of the screwing section of the nut under specific conditions, so that the applicability and convenience of use are ensured, and the nut is convenient to use in various construction environments. In actual use, the locking ring is coaxially arranged in the stud connecting screw hole, larger friction force can be generated between the locking ring in the nut connecting section and the stud, and when the external environment changes (such as vibration, temperature change and the like), the friction force can prevent the nut from rotating relative to the stud, so that the nut is effectively prevented from loosening, and the limiting cover is arranged to play a certain constraint role on the nut, so that the possibility of loosening caused by external factors is further reduced. The application can solve the problems that in the related art, when two structural members are connected by using the stud and the nut in a narrow occasion, the nut is inconvenient to assemble due to lack of guiding and limiting, and the nut is easy to loosen after being installed due to the change of external environment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a mechanism according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the limiting cover in FIG. 1;

FIG. 4 is a front view of the retention cap of FIG. 3;

FIG. 5 is a cross-sectional view of the retention cap of FIG. 4, taken along line A-A;

FIG. 6 is a schematic view of the nut of FIG. 1;

FIG. 7 is a side view of the nut of FIG. 6;

FIG. 8 is a cross-sectional view B-B of the nut of FIG. 7;

FIG. 9 is a schematic view of the structure of the check ring of FIG. 2;

fig. 10 is a front view of the lockwasher of fig. 9.

Reference numerals:

1. The anti-loosening device comprises a limiting cover, a nut, a locking ring, a first connected piece, a second connected piece, a stud, a mounting flange, a limiting section, a connecting section, a screwing section, a pressing section, a supporting section, a24, an annular groove, a 31 and a slot, wherein the limiting cover, the nut, the locking ring, the first connected piece, the second connected piece, the stud, the mounting flange, the limiting section, the connecting section, the screwing section, the 23, the abutting section, the 24, the annular groove and the slot.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The embodiment of the application provides a nut assembly, an anti-loosening double-end stud mechanism and a use method thereof, which are used for solving the problems that in the related art, when two structural members are connected by utilizing a double-end stud and a nut in a narrow space and a deeper occasion, the nut is inconvenient to assemble due to lack of guiding and limiting, and the nut is easy to loosen after being installed due to the change of an external environment.

Referring to fig. 1 to 3, in a first aspect, an embodiment of the present application provides a nut assembly, which includes a nut 2 and a limiting cover 1, wherein the nut 2 includes a coaxial connection section 21 and a screwing section 22, a stud connection screw hole is provided in the connection section 21, a locking ring 3 is coaxially provided in the stud connection screw hole, the screwing section 22 is a hexagonal cylinder, a hexagonal blind hole is provided on an end surface of the hexagonal cylinder far from one end of the connection section 21, the limiting cover 1 includes a limiting section 12, a guiding limiting channel for passing an inner hexagonal wrench for screwing the nut 2 is provided in the limiting section 12, and a mounting flange 11 for being attached to a connected piece is provided at one end of the limiting section 12.

In practical use, when two structural members are to be connected, the stud 6 is usually utilized to be matched with the nut 2 for connection, the stud 6 is firstly rotated to pass through the threaded hole of the first connected member 4 and then pass through the through hole of the second connected member 5, and then the nut 2 is screwed so as to tightly connect the two connected members, but the common nut 2 has the problem of larger size and needs to be operated by means of a spanner or a sleeve, so that the periphery is required to have enough installation and operation space, and in some occasions with smaller installation space, the nut 2 is screwed onto the stud in the operation process, the nut 2 is easy to fall due to lack of guiding and limiting, the nut assembly comprises the limiting cover 1, the limiting cover 1 comprises the limiting section 12 and the mounting flange 11, and when the nut 2 is required to be screwed, the limiting section 12 is internally provided with the guiding limiting passage for the inner hexagonal spanner of the screwing nut 2, and the channel can play a role in guiding the installation of the nut 2, so that the nut 2 can move along the preset direction in the installation process accurately in the preset direction in the installation process, thereby avoiding the lack of the problem in the narrow occasion.

Meanwhile, the screwing section 22 of the nut 2 is a hexagonal cylinder, and the end face of the hexagonal cylinder far away from one end of the connecting section 21 is provided with a hexagonal blind hole, so that the hexagonal blind hole is arranged, the hexagonal blind hole can be used for more accurately screwing the nut 2 in a narrow space, the nut 2 is convenient to assemble in a narrow space, the screwing section 22 is arranged as the hexagonal cylinder, and the hexagonal wrench can be used for accurately screwing under specific conditions, namely, the outer wall or the inner wall of the screwing section 22 of the nut 2 can be screwed, so that the use adaptability and convenience are ensured, and the nut is convenient to use in various construction environments. In actual use, the locking ring 3 is coaxially arranged in the stud connecting screw hole, larger friction force can be generated between the locking ring 3 in the nut 2 connecting section 21 and the stud 6, and when the external environment changes (such as vibration, temperature change and the like), the friction force can prevent the nut 2 from rotating relative to the stud 6, so that the nut 2 is effectively prevented from loosening, and the limiting cover 1 can also play a certain constraint role on the nut 2, so that the possibility of loosening of the nut 2 due to external factors is further reduced. Therefore, the application can solve the problems that in the related art, when two structural members are connected by the stud 6 and the nut 2 in a narrow occasion, the nut 2 is inconvenient to assemble due to lack of guiding and limiting, and the nut 2 is easy to loosen after being installed due to the change of external environment.

In some alternative embodiments, as shown in fig. 2, 9 and 10, the lockwasher 3 is provided in a ring shape, and a plurality of radial slots 31 are provided on an inner ring thereof at equal intervals along the circumferential direction. During the tightening of the nut 2, the edge of the inner ring of the lockwasher 3 will cut into the threads of the stud 6 under pressure. The existence of the slot 31 makes the edge of the inner ring of the locking ring 3 sharper and flexible, and the thread is easier to cut into, so as to form a mechanical engagement effect. This snap action can further prevent the nut 2 from rotating relative to the stud 6, enhancing the stability of the connection and reducing the likelihood of the nut 2 coming loose from external factors.

And during long-term use, the threads of the nut 2 and the stud 6 may slip due to galling. The engagement effect of the anti-loose ring 3 can compensate the abrasion of the screw threads to a certain extent, and the connection strength between the nut 2 and the stud 6 is maintained. Even if the screw thread is slightly worn, the looseness of the nut 2 can be prevented by the locking ring 3 through the biting action, and the service life of the structural connection is prolonged. The inner ring of the anti-loose ring 3 is provided with a plurality of radial slots 31 at equal intervals along the circumferential direction, so that the anti-loose ring 3 has certain elasticity and deformation space, and the anti-loose ring 3 is prevented from generating larger abrasion in the long-time use process, thereby being beneficial to prolonging the service life of the anti-loose ring.

In the actual use process, the anti-loose ring 3 can be made of nylon, and the nylon is relatively soft and has certain flexibility. When the nut 2 is installed, the nylon anti-loose ring 3 can be sleeved on the double-end stud 6 more easily, so that the resistance in the installation process is reduced, an operator can complete the installation work more quickly and easily, and the working efficiency is improved. In addition, the elastic deformation capacity of the nylon anti-loosening ring 3 can automatically adjust the position during installation, ensure good matching with the threads of the double-end stud 6, and avoid the problem of poor anti-loosening effect caused by improper installation. And the nylon material has certain elasticity and toughness, and can keep good performance in a certain temperature range.

In some alternative embodiments, a plurality of lockrings 3 are axially arranged along the connecting section 21 at intervals, and the lockrings 3 are all arranged on the inner ring of the screw hole of the stud connection. The plurality of lockrings 3 are axially spaced apart, and each lockring 3 can generate friction with the threaded surface of the stud 6, and when the nut 2 is subjected to vibration or external force to have a loosening tendency, the friction can act together to prevent the rotation of the nut 2. Compared with a single anti-loosening ring 3, the total friction force provided by a plurality of anti-loosening rings 3 is greatly increased, the anti-loosening effect is greatly enhanced, and the possibility of loosening the nut 2 under complex working conditions is effectively reduced.

In some alternative embodiments, as shown in fig. 6 to 8, the inner wall of the nut 2 is provided with an annular groove 24 for the snap-fit locking ring 3. The annular groove 24 is convenient for clamping the locking ring 3, so that the assembly efficiency in use is improved.

In some alternative embodiments, as shown in fig. 6 and 8, a collision section 23 for abutting against the connected piece is circumferentially disposed on a side of the connection section 21 away from the screwing section 22, the collision section 23 is disposed in a circular ring shape, and an arc chamfer is disposed on an edge of a side of the collision section 23 away from the screwing section 22. The annular abutting section 23 is abutted against the connected piece, so that the contact area between the annular abutting section and the connected piece is increased, the friction force generated between the annular abutting section and the connected piece can be increased, the loosening resistance of the connecting structure is effectively improved, the stability of connection is enhanced, and the loosening of the structure is avoided. The side edge of the abutting section 23, which is far away from the screwing section 22, is provided with an arc chamfer, and the arc chamfer is arranged, so that the contact between the abutting section 23 and a connected piece is softer, and the connected piece is prevented from being scratched in the installation process, so that the connected piece is worn.

In some alternative embodiments, as shown in fig. 4 and 5, the mounting flange 11 is provided with a plurality of through holes for fixing the connected pieces, and circular arc-shaped chamfers are provided around the mounting flange 11. In actual use, the mounting flange 11 of the limiting cover 1 can be connected and fixed with the connected piece through bolts, and circular arc-shaped chamfers are arranged on the periphery of the mounting flange 11, so that the structural members can be prevented from being scratched in the mounting process, or operators can be prevented from being injured.

In some alternative embodiments, as shown in fig. 1, the length of the longest diagonal of the twisting section 22 is smaller than the diameter of the guiding and limiting channel, the diameter of the outer wall of the connecting section 21 is smaller than the diameter of the guiding and limiting channel, and the diameter of the outer wall of the abutting section 23 is larger than the diameter of the guiding and limiting channel. In use, during actual assembly, the nut 2 is installed from one side of the installation flange 11 of the limiting cover 1, and can partially slide in the limiting section 12 of the limiting cover 1 to obtain a certain axial movement space, and the nut plays a guiding role during installation, so that the installation is convenient.

In a second aspect, as shown in fig. 1 and 2, an embodiment of the present application provides an anti-loosening stud mechanism, including the nut assembly and the stud 6 of any one of the above, and the stud 6 is screwed to the nut 2.

Meanwhile, the screwing section 22 of the nut 2 is a hexagonal cylinder, and the end face of the hexagonal cylinder far away from one end of the connecting section 21 is provided with a hexagonal blind hole, so that the hexagonal blind hole is arranged, the hexagonal blind hole can be used for more accurately screwing the nut 2 in a narrow space, the nut 2 is convenient to assemble in a narrow space, the screwing section 22 is arranged as the hexagonal cylinder, and the hexagonal wrench can be used for accurately screwing under specific conditions, namely, the outer wall or the inner wall of the screwing section 22 of the nut 2 can be screwed, so that the use adaptability and convenience are ensured, and the nut is convenient to use in various construction environments. In actual use, the locking ring 3 is coaxially arranged in the stud connecting screw hole, larger friction force can be generated between the locking ring 3 in the nut 2 connecting section 21 and the stud 6, and when the external environment changes (such as vibration, temperature change and the like), the friction force can prevent the nut 2 from rotating relative to the stud 6, so that the nut 2 is effectively prevented from loosening, and the limiting cover 1 can also play a certain constraint role on the nut 2, so that the possibility of loosening of the nut 2 due to external factors is further reduced.

In a third aspect, an embodiment of the present application provides a method for using an anti-loosening stud mechanism, implemented by using the anti-loosening stud mechanism, where the method includes the following steps:

Step one, fixing a double-end stud 6 with a first connected piece 4, and connecting and fixing a limiting cover 1 with a nut 2 arranged inside with a second connected piece 5;

step two, butting the second connected piece 5 with the first connected piece 4, enabling the stud 6 to pass through the through hole of the second connected piece 5 and prop against the nut 2;

And thirdly, clamping the socket wrench on the inner wall of the screwing section 22 of the nut 2, screwing the nut 2, and enabling the nut 2 to rotate in the limiting cover 1 so as to fixedly connect the first connected piece 4 and the second connected piece 5.

In this method, the stud 6 is fixed to the first member to be connected 4, and the limiting cover 1 having the nut 2 disposed therein is connected to the second member to be connected 5, and the two operations of this step can be performed in parallel, regardless of the order of the operations. The connecting section 21 of the nut 2 is internally provided with a stud connecting screw hole, the stud connecting screw hole is internally and coaxially provided with a locking ring 3, before the second connected piece 5 is installed, the limiting cover 1 and the second connected piece 5 can be connected and fixed, when the second connected piece 5 is installed, a socket wrench can be clamped on the inner wall of the screwing section 22 of the nut 2, and the nut 2 is screwed, so that the nut 2 rotates in the limiting cover 1 to connect and fix the first connected piece 4 and the second connected piece 5, and the second connected piece 5 is convenient to operate in a narrow space.

In a fourth aspect, an embodiment of the present application provides a method for using an anti-loosening stud mechanism, implemented by using the anti-loosening stud mechanism, where the method includes the following steps:

Step one, fixing a stud 6 with a first connected piece 4, and butting a second connected piece 5 with the first connected piece 4 to enable the stud 6 to pass through a through hole of the second connected piece 5;

Step two, clamping a socket wrench on the outer wall of the screwing section 22 of the nut 2, and screwing the nut 2 so as to fixedly connect the first connected piece 4 and the second connected piece 5;

And thirdly, sleeving the limiting cover 1 on the outer wall of the nut 2, and fixing the limiting cover 1 on the second connected piece 5.

In the method, the method is suitable for a general occasion with a certain operation space, a stud connecting screw hole is arranged in a connecting section 21 of the nut 2, a locking ring 3 is coaxially arranged in the stud connecting screw hole, during operation, the stud 6 can be sequentially rotated to pass through the first connected piece 4 and the second connected piece 5, specifically, the stud 6 is fixed with the first connected piece 4, the second connected piece 5 is butted with the first connected piece 4, the stud 6 passes through a through hole of the second connected piece 5, then the nut 2 is fixed, and in the fixing process, the screwing section 22 of the nut 2 is a hexagonal cylinder, so that a socket wrench can be used for clamping the outer wall of the nut 2 to screw the nut 2, and then the limiting cover 1 is sleeved on the outer wall of the nut 2.

The two methods can be used for selective assembly according to different installation conditions, and have certain selectivity and freedom.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intervening medium, or may be in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nut assembly, comprising:

A nut (2) comprising a coaxial connecting section (21) and a screwing section (22); a stud connecting screw hole is provided in the connecting section (21), and a locking ring (3) is coaxially provided in the stud connecting screw hole; the screwing section (22) is a hexagonal column, and an end face of the hexagonal column away from one end of the connecting section (21) is provided with a hexagonal blind hole;

A limiting cover (1) includes a limiting section (12), wherein the limiting section (12) is provided with a guide limiting channel for a hexagonal wrench for tightening the nut (2) to pass through; and one end of the limiting section (12) is provided with a mounting flange (11) for fittingly connecting with a connected member.

2. A nut assembly according to claim 1, characterized in that:

The anti-loosening ring (3) is arranged in a circular ring shape, and its inner ring is provided with a plurality of radial slots (31) spaced at equal intervals along the circumferential direction.

3. A nut assembly according to claim 1 or 2, characterized in that:

A plurality of anti-loosening rings (3) are arranged at intervals along the axial direction of the connecting section (21), and the anti-loosening rings (3) are all arranged on the inner ring of the stud connecting screw hole.

4. The nut assembly according to claim 1, wherein:

The inner wall of the nut (2) is provided with an annular groove (24) for clamping the anti-loosening ring (3).

5. The nut assembly according to claim 1, wherein:

A contact section (23) for contacting a connected component is circumferentially provided on a side of the connecting section (21) away from the screwing section (22); the contact section (23) is arranged in a circular ring shape, and an arc chamfer is provided on an edge of a side of the contact section (23) away from the screwing section (22).

6. The nut assembly according to claim 3, wherein:

The mounting flange (11) is provided with a plurality of through holes for fixing connected parts, and the mounting flange (11) is provided with arc-shaped chamfers around its periphery.

7. The nut assembly according to claim 5, characterized in that:

The length of the longest diagonal of the tightening section (22) is smaller than the diameter of the guide limiting channel, the outer wall diameter of the connecting section (21) is smaller than the diameter of the guide limiting channel, and the outer wall diameter of the interference section (23) is larger than the diameter of the guide limiting channel.

8. An anti-loosening stud mechanism, characterized in that it comprises the nut assembly and the stud (6) according to any one of claims 1 to 7, and the stud (6) is threadedly connected to the nut (2).

9. A method for using the anti-loosening stud mechanism according to claim 8, characterized in that the method comprises the following steps:

Fix the stud bolt (6) to the first connected member (4), and connect and fix the limiting cover (1) with a nut (2) inside to the second connected member (5);

The second connected member (5) is docked with the first connected member (4), so that the stud (6) passes through the through hole of the second connected member (5) and abuts against the nut (2);

The socket wrench is clamped to the inner wall of the tightening section (22) of the nut (2), and the nut (2) is screwed so that the nut (2) rotates in the limiting cover (1) to connect and fix the first connected part (4) and the second connected part (5).

10. A method for using the anti-loosening stud mechanism according to claim 8, characterized in that the method comprises the following steps:

Fixing the stud bolt (6) to the first connected member (4), butting the second connected member (5) against the first connected member (4), and allowing the stud bolt (6) to pass through the through hole of the second connected member (5);

Clamping a socket wrench onto the outer wall of the tightening section (22) of the nut (2), and screwing the nut (2) to connect and fix the first connected member (4) and the second connected member (5);

The limiting cover (1) is put onto the outer wall of the nut (2), and the limiting cover (1) is fixed to the second connected member (5).