CN215762754U

CN215762754U - Locking nut

Info

Publication number: CN215762754U
Application number: CN202122041231.5U
Authority: CN
Inventors: 韦俊红; 杨瑞
Original assignee: Henan Nengchi Power Co ltd
Current assignee: Henan Nengchi Power Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-02-08
Anticipated expiration: 2031-08-27

Abstract

The utility model relates to a locking nut which comprises a nut body matched with a matching piece, wherein a threaded hole penetrating through the nut body is formed in the center of the nut body, a steel wire screw sleeve is arranged inside the threaded hole and is a spring-shaped spiral coil, the outer ring of the steel wire screw sleeve is in threaded connection with the threaded hole, the inner ring of the steel wire screw sleeve is in threaded connection with the matching piece, the end surfaces of the upper end and the lower end of the nut body are respectively provided with an upper annular groove and a lower annular groove which are symmetrically arranged, an upper annular pressing sheet extending towards the center of the nut body is fixed inside the upper annular groove, a lower annular pressing sheet extending towards the center of the nut body is fixed inside the lower annular groove, and the inner diameter of the upper annular pressing sheet is equal to the inner diameter of the lower annular pressing sheet and is smaller than the outer diameter of the steel wire screw sleeve. Can effectually avoid the steel wire swivel nut to deviate from nut body is inside, promote the fastness of being connected between nut body and the fitting piece.

Description

Locking nut

Technical Field

The utility model belongs to the technical field of fastening parts, and particularly relates to a locking nut.

Background

In the industrial production process, when parts need to be assembled, it is indispensable to use nuts to mount and fix various parts. The nut can be mounted on a mating member such as a shaft or a bolt by its internal thread for positioning and fixing the component. Traditional nut often sets up a screw hole at a polygonal nut center, and this kind of nut need rotate spanner card on the polygon of nut both sides when using, makes the internal thread of screw hole and the external screw thread on the fitting piece outer wall cooperate to with the fitting piece chucking or loosen. In the use process, the nut and the fitting piece are easy to loosen and are easy to slide or rust, so that the nut and the fitting piece are scrapped. At present, some lock nuts with steel wire thread inserts are also appeared in the market, and are used for fixing the matching piece and improving the connection stability between the two by utilizing the steel wire thread inserts. However, there is still a possibility of loosening between the wire thread insert and the nut, and especially for the nut with a threaded hole penetrating through the nut body, when loosening occurs between the wire thread insert and the nut, the wire thread insert and the nut are easy to be separated from the inside of the nut, which affects the assembly of parts.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a locking nut, which is used for solving the technical problem that the assembly of parts is influenced because the nut in the prior art is easy to loosen when being connected with a mating part.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a locking nut, include the nut body with fitting piece matched with, the central point of nut body puts the screw hole of seting up through the nut body, the inside of screw hole is provided with the steel wire swivel nut, the steel wire swivel nut is the helical coil who is the spring form, the outer lane and the screw hole threaded connection of steel wire swivel nut, the inner circle and the fitting piece threaded connection of steel wire swivel nut, set up the last annular groove that the symmetry set up on the terminal surface at both ends about the nut body respectively, lower annular groove, go up the inside annular preforming that extends to the center department of nut body that is fixed with of annular groove, the inside of lower annular groove is fixed with the lower annular preforming that extends to the center department of nut body, the internal diameter of going up the annular preforming equals the internal diameter of annular preforming down and is less than the external diameter of steel wire swivel nut.

Preferably, the middle part of the steel wire thread insert is provided with a plurality of self-locking rings, each self-locking ring is of a polygonal structure, and the self-locking rings are inscribed in a circular cavity defined by the steel wire thread insert in the orthographic projection in the vertical direction.

Preferably, the outer diameter of the wire thread insert is slightly larger than the inner diameter of the threaded bore.

Preferably, the upper annular pressing plate is connected with the upper annular groove in a welding or riveting mode, and the lower annular pressing plate is connected with the lower annular groove in a welding or riveting mode.

Preferably, the wire thread insert is made of a cold-rolled diamond stainless steel wire material.

Preferably, the nut body, the upper annular pressing piece and the lower annular pressing piece are made of any one of copper, aluminum, iron and stainless steel.

The utility model has the beneficial effects that: (1) the nut has the advantages that the structure is simple, the installation and the use are convenient, the steel wire thread insert is arranged in the nut body, the steel wire thread insert can disperse stress and play a role in protecting the nut body, the steel wire thread insert enables the matching piece to be elastically connected with the threaded hole of the nut body, the load on each circle of threads can be uniformly distributed in the specified length, and the bearing capacity and the fatigue strength of threaded connection are improved; the upper end and the lower end of the nut body are respectively provided with an upper annular pressing sheet and a lower annular pressing sheet, the inner diameter of the upper annular pressing sheet is equal to the inner diameter of the lower annular pressing sheet and is smaller than the outer diameter of the steel wire thread insert, the steel wire thread insert is limited and fixed in the vertical direction, the steel wire thread insert is prevented from being separated from the inside of the nut body, and the firmness of connection between the nut body and a matching piece is improved; (2) the middle part of the steel wire thread insert is provided with a plurality of self-locking rings, the self-locking rings are of polygonal structures, the counter-acting elastic force of the polygonal structures is used for braking the matching piece, and locking and fixing can be realized without additionally arranging other locking structures, so that the steel wire thread insert can still keep strong fastening force between the steel wire thread insert and the matching piece under the condition of high-frequency vibration or temperature change.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

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

FIG. 3 is a schematic structural view of a wire thread insert according to embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of a wire thread insert according to embodiment 2 of the present invention;

fig. 5 is a bottom view of fig. 4.

Reference numerals: the nut comprises a nut body 1, a threaded hole 2, a steel wire thread insert 3, an upper annular groove 4, a lower annular groove 5, an upper annular pressing sheet 6, a lower annular pressing sheet 7 and a self-locking ring 8.

Detailed Description

Example 1

As shown in fig. 1 and 2, the nut of the present invention includes a nut body 1 which is matched with a matching member, the matching member can be a bolt or other shaft member, the cross section of the outer periphery of the nut body 1 is polygonal, and can also be circular, and when the cross section is circular, an anti-slip hole or an anti-slip groove can be formed on the outer periphery of the nut body 1, so as to facilitate installation. A threaded hole 2 penetrating through the nut body 1 is formed in the center of the nut body 1, a steel wire thread insert 3 is arranged inside the threaded hole 2, and as shown in fig. 3, the steel wire thread insert 3 is a spring-shaped spiral coil. The outer ring of the steel wire thread insert 3 is in threaded connection with the threaded hole 2, and the inner ring of the steel wire thread insert 3 is in threaded connection with a fitting piece. The outer diameter of the wire thread insert 3 is slightly larger than the inner diameter of the threaded bore 2. During assembly, the wire thread insert 3 is made to be smaller in diameter by the torque force of the special wrench and screwed into the threaded hole 2, and after the installation is completed, the wire thread insert 3 is firmly fixed in the threaded hole 2 due to expansion caused by extrusion. Set up the last annular groove 4 that the symmetry set up, annular groove 5 down on the terminal surface at both ends about nut body 1 respectively, go up annular groove 4 inside and be fixed with the last annular preforming 6 that extends to the center department of nut body 1, the inside of lower annular groove 5 is fixed with the lower annular preforming 7 that extends to the center department of nut body 1, the internal diameter of going up annular preforming 6 equals the internal diameter of annular preforming 7 down and is less than the external diameter of steel wire swivel nut 3. The upper end and the lower end of the steel wire thread insert 3 are limited and blocked by an upper annular pressing sheet 6 and a lower annular pressing sheet 7 respectively. The upper annular pressing plate 6 is connected with the upper annular groove 4 in a welding or riveting mode, and the lower annular pressing plate 7 is connected with the lower annular groove 5 in a welding or riveting mode. The wire thread insert 3 is made of a cold-rolled diamond stainless steel wire material. The material of the nut body 1, the material of the upper annular pressing sheet 6 and the material of the lower annular pressing sheet 7 can be any one of copper, aluminum, iron and stainless steel.

Example 2

As shown in fig. 4 and 5, the present embodiment is different from embodiment 1 in that a plurality of self-locking rings 8 are disposed in the middle of the wire thread insert 3, the self-locking rings 8 and the other rings of the wire thread insert 3 are integrally formed, the number of the self-locking rings 8 may be one or two, the self-locking rings 8 are polygonal structures, and may be hexagons, but is not limited to the hexagons described in the present embodiment, and may also be triangles, pentagons, and the like. The orthographic projection of the self-locking ring 8 in the vertical direction is connected with a round cavity surrounded by the wire thread insert 3. The remaining structural features are the same as in example 1. Rely on polygonized structure's reaction elasticity to brake the fitting piece, when the fitting piece twists steel wire swivel nut 3's inside, it is not hard up before getting into polygonal self-locking ring 8, when the fitting piece gets into polygonal self-locking ring 8 inside, can strut polygonal self-locking ring 8, make self-locking ring 8 take place to warp, the fitting piece is twisted and is needed to overcome the frictional force that self-locking ring 8 gave the fitting piece this moment, this frictional force makes the fitting piece can not take place the pine and takes off after the fitting piece is screwed up, the fastness of being connected between nut body 1 and the fitting piece has further been promoted.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a lock nut, includes the nut body with fitting piece matched with, its characterized in that: the central point of nut body puts the screw hole of seting up through the nut body, the inside of screw hole is provided with the steel wire swivel nut, the spiral coil of steel wire swivel nut for being spring-type, the outer lane and the screw hole threaded connection of steel wire swivel nut, the inner circle and the fitting piece threaded connection of steel wire swivel nut, set up the last annular groove that the symmetry set up respectively on the terminal surface at both ends about the nut body, lower annular groove, go up the inside last annular preforming that is fixed with the center department extension of nut body of annular groove, the inside of lower annular groove is fixed with the lower annular preforming that extends to the center department of nut body, the internal diameter of going up the annular preforming equals the internal diameter of annular preforming down and is less than the external diameter of steel wire swivel nut.

2. A lock nut as defined in claim 1, wherein: the middle part of the steel wire thread insert is provided with a plurality of self-locking rings, the self-locking rings are of polygonal structures, and the self-locking rings are inscribed in a circular cavity defined by the steel wire thread insert in the orthographic projection in the vertical direction.

3. A lock nut as claimed in claim 1 or 2, wherein: the outer diameter of the wire thread insert is slightly larger than the inner diameter of the threaded bore.

4. A lock nut as claimed in claim 3, wherein: the upper annular pressing plate is connected with the upper annular groove in a welding or riveting mode, and the lower annular pressing plate is connected with the lower annular groove in a welding or riveting mode.

5. A lock nut as claimed in claim 3, wherein: the wire thread insert is made of cold-rolled diamond stainless steel wire.

6. A lock nut as claimed in claim 3, wherein: the nut body, the upper annular pressing sheet and the lower annular pressing sheet are made of any one of copper, aluminum, iron and stainless steel.