CN212899296U

CN212899296U - Anti-loosening structure for threaded connection

Info

Publication number: CN212899296U
Application number: CN202021381307.8U
Authority: CN
Inventors: 张庆华
Original assignee: Xinghua Jiang'an Stainless Steel Products Co ltd
Current assignee: Xinghua Jiang'an Stainless Steel Products Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-04-06
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses an anti-loose structure for threaded connection, which comprises a slotted thread body and a non-return nut unit arranged on the slotted thread body; the non-return nut unit is screwed on the slotted thread body in one way; the non-return nut unit comprises a nut and a non-return fin component fixed on the nut; the slotted thread body is provided with a check groove; the movable end of the non-return fin component is clamped in the non-return groove. The non-return fin assembly comprises an annular bottom plate and a fin body fixed on the annular bottom plate; the projection angle of the fin body on the annular bottom plate is 185-265 degrees. The structure is safe and reliable, and the nut cannot be loosened and withdrawn from the stud or the bolt unless the check fin is damaged; the field use is convenient, and the non-return nut and the slotted thread body only need to be screwed in place according to the thread screwing direction. The scheme takes right-handed threads as an example, and if left-handed thread pairs are met, the corresponding angle can be correspondingly adjusted.

Description

Anti-loosening structure for threaded connection

Technical Field

The utility model belongs to the technical field of mechanical connection, concretely relates to anti loosening structure for threaded connection.

Background

The screw connection is one of the most widely used connection modes in the fields of machinery, construction, traffic, aviation, aerospace, ships, furniture and the like, can generate great connection force, is convenient to repeatedly disassemble and assemble, is easy for mass production, and has low manufacturing cost. However, threaded connections are often susceptible to loosening failures under complex operating conditions (vibration, shock, alternating temperature, etc.). Loosening of the threads not only reduces the connection force, but also induces an overall fracture of the threaded connection structural member (e.g., bolt), causing serious safety accidents.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a check structure for threaded connection to the threaded connection that provides among the above-mentioned background art is not hard up problem is solved.

In order to achieve the above object, the utility model provides a following technical scheme: a kind of threaded connection uses the anti-loosening structure, including the slotted threaded body and non-return nut unit mounted on slotted threaded body; the non-return nut unit is screwed on the slotted thread body in one way; the non-return nut unit comprises a nut and a non-return fin component fixed on the nut;

the slotted thread body is provided with a check groove;

the movable end of the non-return fin component is clamped in the non-return groove.

The non-return fin assembly comprises an annular bottom plate and a fin body fixed on the annular bottom plate; the projection angle of the fin body on the annular bottom plate is 185-265 degrees. The scheme takes right-handed threads as an example, and if left-handed thread pairs are met, the corresponding angle can be correspondingly adjusted.

The projection angle of the fin body on the annular bottom plate is 225 degrees, 230 degrees or 235 degrees.

The number of the non-return grooves is 1-10, and preferably 4.

The number of the fin bodies is consistent with that of the check grooves.

The fin body comprises an elastic plate and a movable end, and the elastic plate is connected between the movable end and the annular bottom plate; the inclined plane of the end surface of the movable end has an inclination angle of 0-5 degrees; the lower side surface of the movable end is a concave cambered surface.

The fin body can also be fixed directly to the end face of the nut.

The side surface of the non-return groove is an inclined surface, and the inclination angle of the inclined surface is 0-5 degrees.

The elastic plate is stainless steel or a spring steel plate, and the mark is preferably 55Si2 Mn.

The slotted thread body is a stud or a bolt.

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

(1) the nut cannot be loosened and withdrawn from the stud or the bolt unless the check fin is damaged;

(2) the field use is convenient, and the non-return nut and the slotted thread body only need to be screwed in place according to the thread screwing direction.

Drawings

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

FIG. 2 is a schematic view of the structure of the grooved thread body of the present invention;

FIG. 3 is a schematic structural view of a check fin set of the present invention;

in the figure: 1. a grooved threaded body; 1-1, a non-return groove; 2. a non-return nut unit; 2-1, a nut; 2-2, a non-return fin assembly; 2-2-1, an annular bottom plate; 2-2-2, an elastic plate; 2-2-3 and a movable end.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention: a kind of threaded connection uses the anti-loosening structure, including the grooved screw body 1 and non-return nut unit 2 mounted on grooved screw body; the non-return nut unit 2 is unidirectionally screwed on the grooved screw body 1, can only be unidirectionally screwed in the grooved screw body 1, but cannot retreat, can be directly applied to a working condition with higher safety requirement, and is simple to install and use and convenient to maintain.

In order to achieve the purpose, the movable end 2-2-3 of the non-return fin component 2-2 is clamped in the non-return groove 1-1. When the nut is screwed in, the elastic plate 2-2-2 can generate elastic deformation, and then the movable end 2-2-3 is driven to enter the next non-return groove 1-1 from the non-return groove 1-1 until the screwing process is finished. At the moment, the movable end 2-2-3 is clamped in the non-return groove 1-1, and a dead point position of a reverse force is formed due to the limitation of an angle, so that the nut is locked.

Further, the non-return nut unit 2 comprises a nut 2-1 and a non-return fin group 2-2 fixed on the nut; the nut 2-1 is fixed with the annular bottom plate 2-2-1 of the check fin group 2-2 in a welding or gluing mode. The nut 2-1 is generally made of standard nut, but the material is generally stainless steel.

Further, a non-return groove 1-1 is arranged on the slotted thread body 1; the side surface of the non-return groove 1-1 is an inclined surface, the inclination angle is 0-5 degrees, the direction of the inclination angle can be determined according to whether the thread is rotated rightwards or leftwards, and the friction force between the movable end 2-2-3 and the slotted thread body 1 is reduced.

Further, the non-return fin assembly 2-2 comprises an annular bottom plate 2-2-1 and a fin body fixed on the annular bottom plate 2-2-1; the projection angle of the fin body on the annular bottom plate 2-2-1 is 185-265 degrees. The scheme takes right-handed threads as an example, and if left-handed thread pairs are met, the corresponding angle can be correspondingly adjusted.

The angle of the projection of the fin body on the annular base plate 2-2-1 is 225 degrees, 230 degrees or 235 degrees.

The number of the non-return grooves 1-1 is 1-10, preferably 4.

The number of the fin bodies is consistent with that of the non-return grooves 1-1.

The fin body comprises an elastic plate 2-2-2 and a movable end 2-2-3, and the elastic plate 2-2-2 is connected between the movable end 2-2-3 and the annular bottom plate 2-2-1; the inclined plane of the end face of the movable end 2-2-3 has an inclination angle of 0-5 degrees; the lower side surface of the movable end 2-2-3 is a concave arc surface, so that the friction force can be further reduced.

The fin body can also be directly fixed on the end face of the nut 2-1.

The elastic plate 2-2-2 is stainless steel or a spring steel plate, and the mark number is preferably 55Si2 Mn.

The slotted thread body 1 is a stud or a bolt.

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 appended claims and their equivalents.

Claims

1. The utility model provides a loosening prevention structure for threaded connection which characterized in that: comprises a slotted thread body and a non-return nut unit arranged on the slotted thread body; the non-return nut unit is screwed on the slotted thread body in one way; the non-return nut unit comprises a nut and a non-return fin component fixed on the nut;

the slotted thread body is provided with a check groove;

2. The loosening prevention structure for threaded connection according to claim 1, characterized in that: the non-return fin assembly comprises an annular bottom plate and a fin body fixed on the annular bottom plate; the projection angle of the fin body on the annular bottom plate is 185-265 degrees.

3. The loosening prevention structure for threaded connection according to claim 2, characterized in that: the projection angle of the fin body on the annular bottom plate is 225 degrees, 230 degrees or 235 degrees.

4. The loosening prevention structure for threaded connection according to claim 1, characterized in that: the number of the non-return grooves is 1-10.

5. The loosening prevention structure for threaded connection according to claim 2, characterized in that: the number of the fin bodies is consistent with that of the check grooves.

6. The loosening prevention structure for threaded connection according to claim 2, characterized in that: the fin body comprises an elastic plate and a movable end, and the elastic plate is connected between the movable end and the annular bottom plate; the inclined plane of the end surface of the movable end has an inclination angle of 0-5 degrees; the lower side surface of the movable end is a concave cambered surface.

7. The loosening prevention structure for threaded connection according to claim 2, characterized in that: the side surface of the non-return groove is an inclined surface, and the inclination angle of the inclined surface is 0-5 degrees.

8. The loosening prevention structure for threaded connection according to claim 6, wherein: the elastic plate is a spring steel plate.

9. The loosening prevention structure for threaded connection according to claim 1, characterized in that: the slotted thread body is a stud or a bolt.

10. The loosening prevention structure for threaded connection according to claim 2, characterized in that: the fin body can also be fixed directly to the end face of the nut.