CN210034123U

CN210034123U - Anti-loosening interlocking nut with high reliability

Info

Publication number: CN210034123U
Application number: CN201920601988.5U
Authority: CN
Inventors: 刘文海
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-02-07
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a high-reliability anti-loose interlocking nut, which comprises a bolt, a main nut and an auxiliary nut, wherein the main nut comprises an internal thread I and an external thread II, the auxiliary nut comprises an internal thread II and an internal thread III, and the major diameter of the internal thread III is larger than that of the internal thread II; the external thread II and the internal thread III are in matched threaded connection, and the internal thread I and the internal thread II are the same threads and are both in matched threaded connection with a bolt; the pitch of the internal thread III is not equal to that of the internal thread II; the utility model discloses having made the main nut realize multiple fastening, realized that the main nut appears becoming flexible vice nut locking effort big more, have structural strength height, reliability height, reuse, low cost, simple process, eliminate hidden danger, be difficult for the maloperation, advantage such as also safe operation of maloperation, be fit for various locking occasions and use, especially be fit for heavy machinery, vehicle engineering, railway system and space system and use.

Description

Anti-loosening interlocking nut with high reliability

Technical Field

The utility model relates to a nut locking device especially relates to an interlocking nut device with high reliability locking performance.

Background

Bolts and nuts often serve to secure more than two joints, and such fasteners are often not detachable in a connection assembly. Fasteners provide the mechanical industry with ease of attachment, but have the disadvantage that they can loosen themselves in environments of frequent vibration and alternating loads, causing the failure or disassembly of a component or a complete device, even resulting in a safety hazard. In order to solve the loosening problem of the fastener, from the birth of the threaded fastener, scientists and engineers make a great deal of tests, researches and technical efforts, and the existing domestic thread loosening prevention methods have various methods, wherein the method for increasing the friction force comprises the methods of arranging a spring washer, a double nut, a deformed tooth shape, a locking washer, a fastening nut, a nylon insert, chemical glue coating and the like, but the reliability is still not very stable under the conditions of heavy load, severe vibration and severe environment; mechanical anti-loosening methods such as slotted nuts, split pins, stop washers, steel wire tandem connection, concave cone locking, tooth shape deformation and the like are limited by structures and cannot be used repeatedly; the anti-loose method of the structure such as cone pressing and holding type anti-loose cannot be widely applied due to complex manufacture and high cost, and the connecting part of the cone body can be cracked and damaged under the condition of large torsion, can not be repeatedly disassembled and used, does not solve the problem fundamentally, and has multiple potential safety hazards; the tooth-shape-variable structure is not universal, can be installed in one direction, is difficult to avoid anti-misoperation during actual construction, cannot ensure anti-loosening and locking effects in all, and is difficult to adapt to the requirements of high safety and high standard in high-vibration scenes such as railway systems, aerospace systems and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locking interlocking nut of high reliability to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a high-reliability anti-loose interlocking nut comprises a bolt, a main nut and an auxiliary nut, wherein the main nut comprises an internal thread I and an external thread II, the auxiliary nut comprises an internal thread II and an internal thread III, and the major diameter of the internal thread III is larger than that of the internal thread II; the external thread II and the internal thread III are in matched threaded connection, and the internal thread I and the internal thread II are the same threads and are both in matched threaded connection with a bolt; the thread pitch of the internal thread III is not equal to that of the internal thread II.

Preferably, the pitch of the internal thread III is greater than the pitch of the internal thread II.

Preferably, the anti-reverse nut further comprises an anti-reverse washer, the anti-reverse washer is sleeved on the external thread II of the main nut, the left surface of the anti-reverse washer is in compression joint with the side surface of the middle of the main nut, and the right surface of the anti-reverse washer is in compression joint with the auxiliary nut.

Preferably, the anti-reverse washer comprises a gasket ring, a convex anti-return buckle is arranged on the right side annular surface of the gasket ring, and a convex fixing buckle is arranged on the left side annular surface of the gasket ring; the side ring surface of the middle part of the main nut is provided with a concave fixing groove, and the side ring surface of the auxiliary nut connected with the internal thread III is provided with a concave anti-withdrawal groove; the convex fixing buckle is fixed in the concave fixing groove, and the convex anti-withdrawing buckle is arranged in the concave anti-withdrawing groove.

Preferably, the convex anti-back buckle is an elastic card with the gradient of 12-30 degrees.

Preferably, the bolt and the external thread II adopt threads with the same rotating direction.

Preferably, the bolt and the external thread II adopt reverse-handed threads.

Preferably, a hemispherical hole is formed in the position I of the internal thread, and an adhesive is pre-sealed in the hemispherical hole.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses technical scheme structure is owing to realized three-layer fastening effort for main nut has realized the multiple fastening in the true sense, adopts the relation of connection of the one-way rotating between anti-backing ring and the vice nut, has realized that main nut appears becoming flexible more, and then vice nut locking effort is big more, thereby realizes the locking structure in the true sense, makes the utility model has the advantages of structural strength is high, high reliability, reuse, low cost, simple process, eliminated the potential safety hazard, be difficult for the maloperation, the maloperation also can safe operation, is fit for the occasion of various locking fastening high-standard and uses, especially is fit for heavy machinery, vehicle engineering, railway system and space system and uses.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the main nut of the present invention.

Fig. 3 is a schematic view of a reverse stop washer according to the present invention.

Fig. 4 is a schematic view of the auxiliary nut of the present invention.

Fig. 5 is an enlarged schematic view of the structure of the portion a in fig. 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the technical scheme in the utility model, all other embodiments that ordinary skilled person in the art obtained under the prerequisite of not making the creative work all belong to the scope of the utility model protection.

Referring to fig. 1 to 5, a high-reliability anti-loose interlocking nut includes a bolt 1, a main nut 3, and an auxiliary nut 2, where the main nut 3 includes an internal thread I32 and an external thread II31, the auxiliary nut 2 includes an internal thread II21 and an internal thread III22, and a major diameter of the internal thread III22 is greater than a major diameter of the internal thread II 21; the external thread II31 and the internal thread III22 are in matched threaded connection, and the internal thread I32 and the internal thread II21 are the same threads and are in matched threaded connection with the bolt 1; the pitch of the internal thread III22 is larger than that of the internal thread II 21; the utility model also comprises a reverse stopping washer 4, the reverse stopping washer 4 is sleeved on the external thread II31 of the main nut 3, the left side of the reverse stopping washer 4 is pressed on the side surface of the middle part of the main nut 3, and the right side of the reverse stopping washer 4 is pressed on the auxiliary nut 2; the anti-reverse washer (4) comprises a gasket ring, the right side ring surface of the gasket ring is provided with a convex anti-return buckle 41, and the left side ring surface of the gasket ring is provided with a convex fixing buckle 42; a concave fixing groove 33 is formed in the side ring surface of the middle part of the main nut 3, and a concave anti-withdrawal groove 23 is formed in the side ring surface of the auxiliary nut 2 connected with the internal thread III 22; the convex fixing buckle 42 is fixed in the concave fixing groove 33, and the convex anti-back buckle 41 is arranged in the concave anti-back groove 23; the convex anti-back buckle 41 is an elastic card with the gradient of 15 degrees; the bolt 1 and the external thread II31 adopt threads with the same rotating direction, a hemispherical hole 34 is formed in the position of the internal thread I32, and an adhesive is pre-sealed in the hemispherical hole 34.

The working principle is as follows: 3 suit of main nut stop reverse washer 4 after fasten in vice nut 2, then synchronous fastening spiro union in bolt 1 again, then 2 antiport of vice nut, this moment the utility model discloses the device locks completely. After the main nut 3 reaches the fastening torque, the first layer of fastening acting force is realized between the internal thread I32 and the bolt 1; because the pitch of the internal thread III22 is larger than that of the internal thread II21, after the auxiliary nut 2 rotates reversely, a second layer of fastening acting force is formed between the internal thread II21 and the bolt 1, and meanwhile, a third layer of fastening acting force is formed between the main nut 3 and the auxiliary nut 2; due to the existence of the anti-loose washer 4, once the main nut 3 loosens during work, the auxiliary nut 2 is forced to rotate only in the reverse direction, so that the second layer of fastening acting force between the internal thread II21 and the bolt 1 and the third layer of fastening acting force between the main nut 3 and the auxiliary nut 2 are further increased, and the reliable anti-loose fastening effect is realized. During the dismantlement, the 15 degrees elasticity cards of contrary packing ring 4 of preceding compulsory forward rotation vice nut 2, destruction, when the second floor fastening effort between internal thread II21 and the bolt 1 is minimum, main nut 3, contrary packing ring 4 of ending and vice nut 2 are become flexible from bolt 1 and are demolishd in step, and the anti packing ring 4 of more renewing at this moment can install the use again. In addition, the adhesive can better assist the main nut in loosening prevention.

Obviously, in the above embodiments, the bolt 1 and the external thread II31 may also adopt reverse-handed threads, and the principle thereof is the same as that of the above embodiments.

The utility model discloses technical scheme structure is owing to realized three-layer fastening effort for main nut 3 has realized the multiple fastening in the true sense, adopts the relation of being connected of the one-way rotating between anti-backing ring 4 and the vice nut 2, has realized that main nut 3 appears becoming flexible more, and then vice nut 2 locking effort is big more, thereby realizes the locking structure in the true sense, makes the utility model has the advantages of high reliability, reuse, low cost, simple process, eliminated the potential safety hazard, be difficult for maloperation, maloperation also can the safe operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. The anti-loose interlocking nut with high reliability comprises a bolt (1), a main nut (3) and an auxiliary nut (2), and is characterized in that the main nut (3) comprises an internal thread I (32) and an external thread II (31), the auxiliary nut (2) comprises an internal thread II (21) and an internal thread III (22), and the major diameter of the internal thread III (22) is greater than that of the internal thread II (21); the external thread II (31) and the internal thread III (22) are in matched threaded connection, and the internal thread I (32) and the internal thread II (21) are the same in thread and are in matched threaded connection with the bolt (1); the thread pitch of the internal thread III (22) is not equal to the thread pitch of the internal thread II (21).

2. A highly reliable anti-loose interlocking nut as claimed in claim 1, characterized in that the pitch of said internal thread III (22) is greater than the pitch of internal thread II (21).

3. The high-reliability anti-loose interlocking nut as claimed in claim 1, further comprising a reverse stopping washer (4), wherein the reverse stopping washer (4) is sleeved on the external thread II (31) of the main nut (3), the left side of the reverse stopping washer (4) is pressed on the side surface of the middle part of the main nut (3), and the right side of the reverse stopping washer (4) is pressed on the auxiliary nut (2).

4. A highly reliable anti-loose interlocking nut as claimed in claim 3, characterized in that said anti-loose washer (4) comprises a washer ring, the right side ring surface of said washer ring is provided with a convex anti-back-off catch (41), the left side ring surface of said washer ring is provided with a convex fixing catch (42); a concave fixing groove (33) is formed in the side ring surface of the middle of the main nut (3), and a concave anti-withdrawal groove (23) is formed in the side ring surface of the auxiliary nut (2) connected with the internal thread III (22); the convex fixing buckle (42) is fixed in the concave fixing groove (33), and the convex anti-withdrawing buckle (41) is arranged in the concave anti-withdrawing groove (23).

5. The high-reliability anti-loose interlocking nut as claimed in claim 4, wherein the convex anti-loose buckle (41) is an elastic card with a gradient of 12-30 degrees.

6. A highly reliable anti-loose interlocking nut as claimed in claim 1, characterized in that said bolt (1) and said external thread II (31) are threaded in the same direction.

7. The high-reliability anti-loose interlocking nut as claimed in claim 1, wherein the bolt (1) and the external thread II (31) adopt reverse-handed threads.

8. The high-reliability anti-loose interlocking nut as claimed in claim 1, wherein a hemispherical hole (34) is formed in the internal thread I (32), and an adhesive is pre-sealed in the hemispherical hole (34).