CN219221015U

CN219221015U - Gasket for constantly fastening bolt and nut and bolt and nut assembly

Info

Publication number: CN219221015U
Application number: CN202320269200.1U
Authority: CN
Inventors: 周俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-31
Filing date: 2023-02-21
Publication date: 2023-06-20
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses a gasket for constantly fastening a bolt and a nut and a bolt and nut assembly, and relates to the technical field of mechanical parts, comprising a positioning main body; the center of the positioning main body is provided with a through hole so as to be sleeved on the periphery of the bolt; the end face of the positioning main body, which is far away from the bolt, is provided with a positioning blocking mechanism which is clamped with the nut so as to keep the positioning main body and the nut to follow at least in a rotation direction; the through hole is internally provided with a clamping key, and the clamping key is selectively clamped with the surface of the bolt, so that the positioning main body is prevented from rotating when the clamping key is clamped with the bolt. The screw bolt and nut connecting device can achieve the purpose that the connection between the screw bolt and the nut is tighter, and the situation that the screw bolt and the nut are loosened or even fall down due to vibration is avoided.

Description

Gasket for constantly fastening bolt and nut and bolt and nut assembly

Technical Field

The utility model belongs to the technical field of mechanical spare and accessory parts, and particularly relates to a gasket for constantly fastening a bolt and a nut and a bolt and nut assembly.

Background

The bolt is a fastener consisting of a head part and a screw rod (a cylinder with external threads), and is matched with a nut and a gasket for fastening and connecting two parts with through holes. The bolt is widely applied to the current production and life as a connecting fitting, and has good connecting effect and convenient disassembly, so that the bolt is widely accepted by people, and the requirement on the anti-loosening fastening performance of the nut is continuously improved along with the change of the use scene.

The prior fastening bolt and nut can increase the fastening performance of the bolt when being matched and connected, so that two parts with through holes are connected together, but the parts and the bolt can vibrate relatively due to collision and jolt in the transportation and carrying processes of the parts, so that the bolts and the nuts are loosened and even fall in a vibration environment or a vibration part, the parts are separated to cause the occurrence of part missing and the like, and the prior fastening bolt and nut can not fundamentally solve the problems brought by the bolts and the nuts in the vibration environment.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the gasket for constantly fastening the bolt and the nut and the bolt and nut assembly, which can realize the connection between the bolt and the nut to be more compact, and avoid the condition that the bolt and the nut are loosened and even fall down due to vibration.

The utility model relates to a gasket for constantly fastening a bolt and a nut, which comprises a positioning main body; the center of the positioning main body is provided with a through hole so as to be sleeved on the periphery of the bolt; the end face of the positioning main body, which is far away from the bolt, is provided with a positioning blocking mechanism which is clamped with the nut so as to keep the positioning main body and the nut to follow at least in a rotation direction; the through hole is internally provided with a clamping key, and the clamping key is selectively clamped with the surface of the bolt, so that the positioning main body is prevented from rotating when the clamping key is clamped with the bolt.

As a further improvement of the utility model, the inner wall of the through hole is provided with a through hole; the clamping key is connected in the hole in a sliding way, so that the clamping key can slide in the hole in a direction approaching or separating from the through hole.

As a further improvement of the utility model, the snap key comprises an elastic snap key, the elastic snap key comprises a column body and a snap key big head cover; the column body is made of rigid materials and is connected in the hole in a sliding way; the clamping key big head cover is connected to one side of the column body close to the through hole; and a clamping key spring is fixedly connected between the column body and the clamping key big head cover, and when the clamping key spring is in a free state, the clamping key big head cover pops out towards the direction close to the axis of the through hole and is clamped with the bolt.

As a further improvement of the utility model, the hole comprises an inner side section and an outer side section, wherein the inner side section is a section of channel of the hole on one side close to the through hole, the outer side section is a section of channel of the hole on one side far away from the through hole, and the inner diameter of the outer side section is smaller than the inner diameter of the inner side section; the outer diameter of the large head cover of the clamping key is smaller than the inner diameter of the inner side section and larger than the inner diameter of the outer side section.

As a further improvement of the utility model, a protective layer is arranged on one side of the positioning main body close to the bolt; the protective layer is made of nonmetallic elastic materials; the protective layer covers the end face of the positioning main body, which is close to the bolt.

As a further improvement of the utility model, the positioning and blocking mechanism comprises at least one locking tooth or at least one locking groove; at least one anti-loosening convex tooth or at least one anti-loosening groove is radially arranged along the radial direction of the positioning main body; the anti-loose convex teeth are arranged in a prismatic bulge mode, and the anti-loose grooves are arranged in a prismatic concave mode.

As a further improvement of the utility model, the positioning and stopping mechanism comprises annular bulges or annular grooves, the number of the annular bulges or the annular grooves is at least one circle, and at least one circle of annular bulges or annular grooves are coaxially arranged with the positioning main body.

A bolt and nut assembly comprises a bolt and a nut; the bolt comprises a screw head and a screw rod; the screw head is fixedly connected to one end of the screw rod; the outer surface of the screw rod is provided with a clamping groove which is axially arranged from one end of the screw rod far away from the screw head and is matched with the clamping key;

the end face of the nut, which is close to the gasket, is provided with a locking and stopping mechanism, and the locking and stopping mechanism is matched with the positioning and stopping mechanism, so that the nut and the gasket are clamped through the locking and stopping mechanism and the positioning and stopping mechanism.

As a further improvement of the utility model, the positioning and blocking mechanism comprises at least one locking tooth or at least one locking groove; at least one anti-loosening convex tooth or at least one anti-loosening groove is radially arranged along the radial direction of the positioning main body; the anti-loose convex teeth are arranged in a prismatic convex way, and the anti-loose grooves are arranged in a prismatic concave way;

the locking and stopping mechanism comprises a plurality of prismatic grooves matched with the locking convex teeth or a plurality of prismatic protrusions matched with the locking grooves; the prismatic grooves or the prismatic protrusions are radially arranged along the radial direction of the nut, so that the nut and the gasket are clamped through the positioning and stopping mechanism and the locking organization mechanism.

As a further improvement of the utility model, the positioning and stopping mechanism comprises annular bulges or annular grooves, the number of the annular bulges or the annular grooves is at least one circle, and at least one circle of annular bulges or annular grooves are arranged coaxially with the positioning main body;

the locking preventing mechanism comprises at least one circle of grooves matched with the annular bulges or at least one circle of bulges matched with the annular grooves; at least one circle of groove or at least one circle of protrusion is coaxially arranged with the nut; so that the nut and the gasket are clamped by the positioning and preventing mechanism and the locking organization mechanism.

Compared with the prior art, the utility model has the beneficial effects that:

when the bolt and the nut are arranged on the two parts to fixedly connect the two parts, the positioning main body is arranged between the screw head and the nut, and the positioning main body is fixedly connected with the nut due to the matched connection of the positioning stopping mechanism and the locking stopping mechanism on the nut, so that the nut and the positioning main body synchronously rotate and are synchronously fixed; the clamping key on the positioning main body is limited by the clamping groove on the screw rod, so that the positioning main body cannot rotate, and the connected nut cannot rotate; under the condition, the nut can not rotate and unscrew because of vibration of the parts in the transportation and carrying processes, the nut is firmly fixed on the screw rod, the nut is prevented from loosening and falling off, the fastening and falling-off preventing effects are further realized, and the danger or potential risk caused by loosening and falling of the nut is permanently solved;

the large head cover of the clamping key can be ejected towards the clamping groove under the action of the spring and the column body and clamped in the clamping groove, so that the positioning main body and the screw are fixed, and the nut connected with the positioning main body can be prevented from loosening and falling from the screw; meanwhile, the cylinder can be controlled to slide out in the direction away from the screw rod so that the large head cover of the clamping key is separated from the clamping groove, thereby realizing the separation of the positioning main body and the screw rod, and the positioning main body can rotate around the screw rod, and the nut can also rotate at the moment so as to facilitate the removal of the nut and the separation of the two parts; the situation that the nut cannot be taken down under the condition that the nut and the positioning main body are firmly locked and cannot rotate is avoided, so that two parts are permanently fixed, the situation that occasionally single use is lost and more advantages are achieved is avoided, the nut is more flexible to fasten and take down, the use is convenient, and the application range is wide;

the protective layer is used for being in contact with the surface of the part, namely, the friction force between the positioning main body and the part is increased, the function of protecting the contact surface is achieved, the part is prevented from damaging the positioning main body, the positioning main body is prevented from damaging the part, and the cost saving and the recycling are facilitated.

Drawings

FIG. 1 is a schematic view of a single-layer gasket according to a first embodiment of the present utility model;

FIG. 2 is a schematic view of a bolt with a slot according to the present utility model;

FIG. 3 is a schematic view of a single-layer gasket according to a second embodiment of the present utility model;

FIG. 4 is a schematic view of a single-layer gasket according to a third embodiment of the present utility model;

FIG. 5 is a schematic view of a nut according to a third embodiment of the present utility model;

FIG. 6 is a schematic view of a single-layer gasket according to a fourth embodiment of the present utility model;

FIG. 7 is a schematic view of a nut according to a fourth embodiment of the present utility model;

FIG. 8 is a schematic view of a single-layer gasket according to a fifth embodiment of the present utility model;

FIG. 9 is a schematic diagram of a single-layer gasket according to a fifth embodiment of the present utility model;

FIG. 10 is a schematic view of a two-layer gasket according to an eighth embodiment of the present utility model;

FIG. 11 is a schematic view showing a double-layer gasket according to an eighth embodiment of the present utility model;

FIG. 12 is a schematic view showing a double-layer gasket according to an eighth embodiment of the present utility model;

FIG. 13 is a schematic view showing a double-layer gasket according to an eighth embodiment of the present utility model;

FIG. 14 is a schematic view showing a double-layer gasket according to an eighth embodiment of the present utility model;

fig. 15 is a schematic structural view of a gasket with a double-layered structure according to an eighth embodiment of the present utility model.

The reference numerals in the figures illustrate: 1 anti-loose convex tooth, 2 upper end surface layer of bolt and nut gasket, 3 lower end surface layer of bolt and nut gasket, 4 elastic clamping key, 5 clamping key spring, 6 clamping key big head cover, 7 holes 8 double-layer structure gaskets, 9 annular bulges, 10 annular grooves, 11 anti-loosening grooves, 12 single-layer gaskets, 13 bolts, 131 screws, 132 screw heads, 133 clamping grooves and 14 nuts.

Description of the embodiments

First embodiment: referring to fig. 1-2, a constant tightening bolt-nut washer for tightening a connection between a bolt 13 and a nut 14, the washer includes a single-layer washer 12.

The single-layer gasket 12 is made of a rigid metal material, the single-layer gasket 12 is circular in shape, and through holes with the sizes matched with those of the bolts 13 are formed in the coaxial center of the single-layer gasket 12, and the through holes are circular in shape so that the rod parts of the bolts 13 can pass through the through holes.

At least one anti-loosening convex tooth 1 is arranged on one end face of the single-layer gasket 12, the anti-loosening convex tooth 1 is arranged in a prismatic bulge mode, and at least one anti-loosening convex tooth 1 is arranged radially along the radial direction of the single-layer gasket 12; in the present embodiment, as shown in fig. 1, the number of the locking teeth 1 is three.

The inside of the single-layer gasket 12 is provided with a hole 7, the hole 7 is a channel formed along the radial direction of the single-layer gasket 12, and the hole 7 is communicated with the through hole of the single-layer gasket 12 and the outside; the hole 7 comprises an inner section and an outer section, the inner section is a section of channel of the hole 7 close to one side of the through hole, the outer section is a section of channel of the hole 7 far away from one side of the through hole, and the inner diameter of the outer section is smaller than that of the inner section.

An elastic clamping key 4 is arranged in the hole 7, and the elastic clamping key 4 comprises a column body and a clamping key big head cover 6;

the column body is made of rigid materials, the outer diameter of the column body is equal to the inner diameter of the outer section, and the column body is connected in the hole 7 in a sliding manner, so that the column body can move in the hole 7 towards the direction approaching or separating from the axis of the single-layer gasket 12;

the large clamping key head cover 6 is connected to one side of the column body close to the through hole, the large clamping key head cover 6 is arranged in the through hole, the large clamping key head cover 6 is circular in shape, the outer diameter of the large clamping key head cover 6 is smaller than the inner diameter of the inner section, so that the large clamping key head cover 6 can enter the inner section, and the outer diameter of the large clamping key head cover 6 is larger than the inner diameter of the outer section, so that the large clamping key head cover 6 is prevented from falling out of the hole 7;

a clamping key spring 5 is connected between the clamping key big head cover 6 and the column body, one end of the clamping key spring 5 is fixedly connected with the column body, and the other end of the clamping key spring 5 is fixedly connected with the clamping key big head cover 6; so that the snap spring 5 is in a free state, the snap big head cover 6 pops up towards the center of the single-layer gasket 12.

The bolt 13 includes a rod-shaped screw 131 and a screw head 132;

the screw head 132 is made of rigid materials, and the screw head 132 is fixedly connected with one end of the screw 131;

the screw 131 is made of rigid materials, threads are arranged on the outer surface of the screw 131, a clamping groove 133 is formed in the outer surface of the screw 131, the clamping groove 133 is axially formed by the screw 131 at one end far away from the screw head 132, the size of the clamping groove 133 is matched with the size of the large clamping key head cover 6, when the screw 131 is connected with the single-layer gasket 12, the large clamping key head cover 6 is clamped in the clamping groove 133, and the end face, close to the clamping groove 133, of the large clamping key head cover 6 is abutted against the screw 131.

The nut 14 is used for being matched and connected with the bolt 13; a plurality of locking preventing grooves are formed in one end face of the nut 14, the number of the locking preventing grooves is equal to or larger than that of the anti-loosening lugs 1, the locking preventing grooves are matched with the anti-loosening lugs 1, the inclination directions of the locking preventing grooves are matched with the inclination directions of the anti-loosening lugs 1, so that the anti-loosening lugs 1 can be meshed with the locking preventing grooves, the nut 14 is meshed with the single-layer gasket 12, and the nut 14 and the single-layer gasket 12 can be synchronously rotated and synchronously fixed when connected;

it should be noted that at least three locking preventing grooves are formed on the end surface of the nut 14 provided with the locking preventing grooves and can be engaged with the locking lugs 1 at the same time, so that all locking lugs 1 on the washer can be engaged with the locking lugs 1, and the single-layer washer 12 is tightly connected with the nut 14.

Working principle: the bolt 13 passes through two parts to be connected, a worker firstly sleeves the single-layer gasket 12 along the direction of the screw 131 and the periphery of the screw 131, at the moment, the end face of the single-layer gasket 12 provided with the anti-loosening convex tooth 1 faces outwards, the smooth end face faces towards the part until the smooth surface is abutted with the part, at the moment, the large clamping key head cover 6 is clamped in the clamping groove 133 under the action of the clamping key spring 5, the end face, close to the clamping groove 133, of the large clamping key head cover 6 is abutted with the screw 131, and at the moment, the long-term fastening bolt and nut gasket cannot rotate around the axis;

the nut 14 is connected to the periphery of the screw 131 in a threaded manner, at the moment, the end face of the nut 14 provided with the locking preventing groove faces the single-layer gasket 12, the nut 14 is screwed in the direction close to the single-layer gasket 12 until the locking preventing groove is meshed with the locking convex tooth 1, at the moment, the nut 14 is meshed with the single-layer gasket 12, and the nut 14 synchronously rotates and is synchronously fixed when being connected with the single-layer gasket 12; the gasket cannot rotate at this time, so that the nut 14 cannot rotate, and the situation that the nut 14 is loosened or falls off due to vibration of parts is avoided;

when the nut 14 and the gasket need to be removed, the elastic clamping key 4 can be moved in a direction far away from the axis of the single-layer gasket 12 so that the clamping key big head cover 6 leaves the clamping groove 133, the clamping key big head cover 6 enters the inner side section, and at the moment, the single-layer gasket 12 can rotate around the screw 131 so that the nut 14 can rotate around the screw 131, and the nut 14 can be rotated and unscrewed; the nut can not be taken down under the condition that the nut and the gasket are firmly locked and cannot rotate, so that the two parts are permanently fixed, the situation that the single use is more advantageous occasionally is lost, the nut is fastened and taken down more flexibly, the nut can not be vibrated to loosen when the two parts are required to be connected, the nut and the gasket can be taken down quickly when the two parts are required to be used separately, the use is convenient, and the application range is wide.

Specific embodiment II: unlike the first embodiment, the single-layer gasket 12 is not provided with the anti-loosening teeth 1 on one end surface, as shown in fig. 3, a circle of annular protrusions 9 are arranged on the end surface, and the annular protrusions 9 are annular;

and at this time, the end face of the nut 14, which is originally provided with the locking preventing groove, is provided with a groove with a size matched with the size of the annular protrusion 9, so that the groove can be meshed with the annular protrusion 9, and the nut 14 is meshed with the single-layer gasket 12, so that synchronous rotation and synchronous fixation when the nut 14 is connected with the single-layer gasket 12 are realized.

Third embodiment: unlike the first embodiment, one end surface of the single-layer gasket 12 is not provided with a locking tooth 1, as shown in fig. 4, a circle of annular grooves 10 are formed on the end surface, and the shape of the annular grooves 10 is circular;

and at this time, the end surface of the nut 14 originally provided with the locking preventing groove is provided with a protrusion with a size matched with that of the annular groove 10, as shown in fig. 5, so that the protrusion can be engaged with the annular groove 10, and the nut 14 is engaged with the gasket, so that synchronous rotation and synchronous fixation when the nut 14 is connected with the gasket are realized.

Fourth embodiment: unlike the first embodiment, the single-layer gasket 12 is provided with no locking tooth 1 on one end surface, as shown in fig. 6, at least one locking groove 11 is formed on the end surface, the locking groove 11 is a prismatic groove, and at least one locking groove 11 is radially arranged along the radial direction of the single-layer gasket 12; in the present embodiment, the number of the locking grooves 11 is three;

the end surface of the nut 14 provided with the locking prevention groove is provided with prismatic protrusions with the size matched with that of the anti-loosening groove 11, as shown in fig. 7, the inclined direction of the protrusions is matched with that of the anti-loosening groove 11, and the number of the protrusions is larger than that of the anti-loosening groove 11, so that the protrusions can be meshed with the anti-loosening groove 11, the nut 14 is meshed with the single-layer gasket 12, and synchronous rotation and synchronous fixation when the nut 14 is connected with the single-layer gasket 12 are realized;

it should be noted that at least three prismatic protrusions are provided on the end surface of the nut 14 provided with the prismatic protrusions and may be engaged with the locking grooves 11 at the same time, so that all locking grooves 11 on the single-layer washer 12 may be engaged with the prismatic protrusions, so that the single-layer washer 12 is tightly connected with the nut 14.

Fifth embodiment: unlike the first to fourth embodiments, referring to fig. 8 to 9, the single-layer spacer 12 has a regular hexagonal shape.

Specific embodiment six: unlike the second and third embodiments, the cross section of the annular protrusion 9 or the annular groove 10 is not circular, and the annular protrusion 9 or the annular groove 10 is regular polygonal ring such as regular triangle ring, square ring, etc.

Specific embodiment seven: unlike the second, third and sixth embodiments, the number of the annular projections 9 or the annular grooves 10 is plural, and the plurality of the annular projections 9 or the annular grooves 10 are coaxially arranged.

Specific embodiment eight: unlike the first embodiment to the seventh embodiment, referring to fig. 10 to 15, the gasket is a two-layer structure gasket 8 of a composite structure of a metal layer and a nonmetallic elastic layer, and the two-layer structure gasket 8 includes a bolt-nut gasket upper end surface layer 2 and a bolt-nut gasket lower end surface layer 3;

the arrangement of the bolt-nut gasket upper end surface layer 2 is the same as that of the single-layer gasket 12 described in any one of the first to seventh embodiments;

the bolt-nut gasket lower end surface layer 3 is fixedly connected to the end surface of the bolt-nut gasket upper end surface layer 2 far away from the nut 14, the bolt-nut gasket lower end surface layer 3 is made of a nonmetallic elastic material, and the bolt-nut gasket lower end surface layer 3 covers the whole end surface of the bolt-nut gasket upper end surface layer 2; the lower end surface layer 3 of the bolt and nut gasket is attached to the surface of the part during operation, so that the lower end surface layer 3 of the bolt and nut gasket plays roles in protecting a contact surface and increasing friction.

Therefore, in application, the worker prefers the double-layer structure spacer 8 of a composite structure of a metal layer and a nonmetallic elastic layer as a spacer for fastening the bolt 13 and the nut 14.

It should be noted that, the bolt-nut gasket upper end surface layer 2 and the bolt-nut gasket lower end surface layer 3 may be integrally formed, or may be integrally connected by an adhesive material or other means after the bolt-nut gasket upper end surface layer 2 and the bolt-nut gasket lower end surface layer 3 are respectively processed.

Claims

1. A gasket for constantly fastening a bolt and a nut is positioned between the bolt (13) and the nut (14); the method is characterized in that: comprises a positioning main body; the center of the positioning main body is provided with a through hole which is sleeved on the periphery of the bolt (13); the end face of the positioning main body, which is far away from the bolt (13), is provided with a positioning blocking mechanism which is clamped with the nut (14) so as to keep the positioning main body and the nut (14) to follow at least in a rotation direction; a clamping key is arranged in the through hole and is selectively clamped with the surface of the bolt (13), so that the positioning main body is prevented from rotating when the clamping key is clamped with the bolt (13).

2. A constant tightening bolt and nut spacer as defined in claim 1, wherein: the inner wall of the through hole is provided with a through hole (7); the clamping key is connected in the hole (7) in a sliding way, so that the clamping key can slide in the hole (7) towards the direction approaching or separating from the through hole.

3. A constant tightening bolt and nut spacer as defined in claim 2, wherein: the clamping key comprises an elastic clamping key (4), and the elastic clamping key (4) comprises a column body and a clamping key big head cover (6); the column body is made of rigid materials and is connected in the hole (7) in a sliding way; the clamping key big head cover (6) is connected to one side of the column body close to the through hole; and a clamping key spring (5) is fixedly connected between the column body and the clamping key big head cover (6), and when the clamping key spring (5) is in a free state, the clamping key big head cover (6) pops out towards the direction close to the axis of the through hole and is clamped with the bolt (13).

4. A constant tightening bolt and nut spacer as defined in claim 3, further characterized by: the hole (7) comprises an inner section and an outer section, the inner section is a section of channel of the hole (7) close to one side of the through hole, the outer section is a section of channel of the hole (7) far away from one side of the through hole, and the inner diameter of the outer section is smaller than that of the inner section; the outer diameter of the large clamping key head cover (6) is smaller than the inner diameter of the inner side section and larger than the inner diameter of the outer side section.

5. A constant tightening bolt and nut spacer as defined in claim 1, wherein: a protective layer is arranged on one side of the positioning main body, which is close to the bolt (13); the protective layer is made of nonmetallic elastic materials; the protective layer covers the end face of the positioning main body, which is close to the bolt (13).

6. A constant tightening bolt and nut spacer as defined in claim 1, wherein: the positioning and blocking mechanism comprises at least one anti-loosening convex tooth (1) or at least one anti-loosening groove (11); at least one anti-loosening convex tooth (1) or at least one anti-loosening groove (11) is radially arranged along the radial direction of the positioning main body; the anti-loose convex teeth (1) are arranged in a prismatic protruding mode, and the anti-loose grooves (11) are arranged in a prismatic concave mode.

7. A constant tightening bolt and nut spacer as defined in claim 1, wherein: the positioning and blocking mechanism comprises annular bulges (9) or annular grooves (10), the number of the annular bulges (9) or the annular grooves (10) is at least one circle, and at least one circle of annular bulges (9) or annular grooves (10) are arranged coaxially with the positioning main body.

8. A bolt and nut assembly, characterized in that: a spacer comprising a bolt (13), a nut (14), a constant tightening bolt nut according to any of claims 1-5;

the bolt (13) comprises a screw head (132) and a screw rod (131); the screw head (132) is fixedly connected to one end of the screw rod (131); a clamping groove (133) is formed in the outer surface of the screw rod (131), the clamping groove (133) is axially formed at one end, far away from the screw head (132), of the screw rod (131), and the clamping groove (133) is matched with the clamping key;

the end face of the nut (14) close to the gasket is provided with a locking and stopping mechanism, and the locking and stopping mechanism is matched with the positioning and stopping mechanism, so that the nut (14) and the gasket are clamped through the locking and stopping mechanism and the positioning and stopping mechanism.

9. A bolt and nut assembly according to claim 8, wherein: the positioning and blocking mechanism comprises at least one anti-loosening convex tooth (1) or at least one anti-loosening groove (11); at least one anti-loosening convex tooth (1) or at least one anti-loosening groove (11) is radially arranged along the radial direction of the positioning main body; the anti-loosening convex teeth (1) are arranged in a prismatic convex mode, and the anti-loosening grooves (11) are arranged in a prismatic concave mode;

the locking and stopping mechanism comprises a plurality of prismatic grooves matched with the anti-loosening convex teeth (1) or a plurality of prismatic protrusions matched with the anti-loosening grooves (11); the prismatic grooves or the prismatic protrusions are radially arranged along the radial direction of the nut (14) so that the nut (14) and the gasket are clamped through the positioning and stopping mechanism and the locking organization mechanism.

10. A bolt and nut assembly according to claim 8, wherein: the positioning and blocking mechanism comprises annular bulges (9) or annular grooves (10), the number of the annular bulges (9) or the annular grooves (10) is at least one circle, and at least one circle of annular bulges (9) or annular grooves (10) are arranged coaxially with the positioning main body;

the locking and stopping mechanism comprises at least one circle of grooves matched with the annular bulges (9) or at least one circle of bulges matched with the annular grooves (10); at least one circle of grooves or at least one circle of protrusions are arranged coaxially with the nut (14); so that the nut (14) and the gasket are clamped by the positioning and preventing mechanism and the locking organization mechanism.