CN113374773A

CN113374773A - Threaded connection device with anti-loosening function

Info

Publication number: CN113374773A
Application number: CN202110773809.8A
Authority: CN
Inventors: 刘跃群
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-09-10

Abstract

The invention discloses a threaded connection device with anti-loosening function, which relates to the technical field of fastening devices; it comprises a locking nut body and several conical parts; the middle of the locking nut body is provided with internal threads; The inner side of the anti-loosening nut body is provided with at least one expansion groove along the radial direction of the thread; several conical parts are sleeved on the outer side of the anti-loosing nut body, and are in interference fit with the anti-loosening nut body; the present invention can effectively prevent impact and vibration , Under the action of variable load, the nut is loose, and the safety is enhanced.

Description

Threaded connection device with anti-loosening function

Technical Field

The invention relates to the technical field of fastening devices, in particular to a threaded connection device with a locking function.

Background

In the prior art, the fastening of the connected object is usually realized by bolts, gaskets and nuts, and the connected object does not automatically loosen under the static load condition. However, there are inevitably shock, vibration, and variable load effects due to the working conditions of the coupling. Under the working conditions, the friction force between the thread pairs can disappear or reduce instantly; meanwhile, in the occasions of high temperature or large temperature change, the material can generate creep and stress relaxation, and the friction force is also reduced. Under the action of a plurality of times, the connection can be gradually loosened, and safety accidents are caused.

Disclosure of Invention

The invention aims to provide a threaded connection device with a locking function, which has the advantages of simple structure, reasonable design and convenient use, and aims to overcome the defects and shortcomings of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the anti-loosening nut comprises an anti-loosening nut body and a plurality of conical parts; the middle part of the locknut body is provided with an internal thread; at least one telescopic groove is radially arranged on the inner side of the locknut body along the thread; the plurality of conical parts are sleeved on the outer side of the locknut body and are in interference fit with the locknut body;

furthermore, the whole conical part is inclined at an angle of 2-15 degrees;

furthermore, the conical parts are connected in series on the locknut body along the same taper direction;

furthermore, the conical parts are connected in series on the locknut body along different taper directions.

After adopting the structure, the invention has the beneficial effects that: the threaded connection device with the anti-loosening function can effectively prevent the nut from loosening under the action of impact, vibration and variable load, has enhanced safety, and has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic structural view of embodiment 1;

FIG. 3 is a schematic structural view of example 2;

FIG. 4 is a schematic structural view of the locknut body;

FIG. 5 is a schematic view of a tapered part;

fig. 6 is a schematic diagram of the use of the present invention.

Description of reference numerals:

1. a locknut body; 2. a conical part; 3. a bolt; 4. a first fastened piece; 5. a second fastened piece; 6. a common nut; 1-1, a telescopic groove; 1-2 and internal threads.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Example 1: referring to fig. 1-2, fig. 4-5, it comprises a locknut body 1 and four conical parts 2; the middle part of the locknut body 1 is provided with an internal thread 1-2; two telescopic grooves 1-1 are radially arranged on the inner side of the locknut body 1 along the thread; the conical part 2 is integrally inclined, and the inclination angle alpha is 6 degrees; the four conical parts 2 are connected in series on the outer side of the locknut body 1 along the same taper direction and are in interference fit with the locknut body 1;

example 2: referring to fig. 1, fig. 3-5, it comprises a locknut body 1 and four conical parts 2; the middle part of the locknut body 1 is provided with an internal thread 1-2; two telescopic grooves 1-1 are radially arranged on the inner side of the locknut body 1 along the thread; the conical part 2 is integrally inclined, and the inclination angle alpha is 10 degrees; the four conical parts 2 are connected in series on the outer side of the locknut body 1 along different taper directions and are in interference fit with the locknut body 1;

when the invention is used, the bolt 3 firstly passes through the first fastened piece 4 and the second fastened piece 5 and is locked by the common nut 6, and then the threaded connecting device of the invention is connected with the bolt 3 in a threaded manner and is locked at the outer side of the common nut 6. According to the invention, the telescopic groove 1-1 is formed in the locknut body 1, the conical part 2 is in interference fit with the outer side of the locknut body 1, the inner diameter of the thread of the locknut body 1 is reduced, so that the locknut body 1 and the bolt 3 are connected more tightly, meanwhile, the conical part 2 is provided with the taper, the friction force between the conical part and the locknut body 1 and the common nut 6 is increased, the common nut can be effectively prevented from loosening under the actions of impact, vibration and variable load, and the safety is enhanced.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A threaded connection device with a locking function is characterized by comprising a locknut body and a plurality of conical parts; the middle part of the locknut body is provided with an internal thread; at least one telescopic groove is radially arranged on the inner side of the locknut body along the thread; the plurality of conical parts are sleeved on the outer side of the locknut body and are in interference fit with the locknut body.

2. A threaded connection with anti-loosening function as defined in claim 1, wherein said tapered part is inclined as a whole at an angle of 2-15 °.

3. A threaded connection device with anti-loosening function as claimed in claim 2, wherein said tapered parts are connected in series on the locknut body in the same taper direction.

4. A threaded connection device with anti-loosening function as defined in claim 2, wherein said tapered parts are connected in series to the locknut body in different taper directions.