CN210034126U

CN210034126U - Anti-loosening fastener

Info

Publication number: CN210034126U
Application number: CN201920429737.3U
Authority: CN
Inventors: 赵克
Original assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Current assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2020-02-07
Anticipated expiration: 2029-04-01

Abstract

The application belongs to the technical field of fastening design, concretely relates to locking fastener, include: the bolt is provided with a first connecting section and a second connecting section on a screw rod; the first connecting section is closer to the head of the bolt than the second connecting section, and the diameter of the first connecting section is larger than that of the second connecting section; the first nut is connected with the first connecting section in a matched mode through first threads; the second nut is connected with the second connecting section in a matched mode through a second thread and is abutted against the first nut; the first thread is opposite to the second thread.

Description

Anti-loosening fastener

Technical Field

The application belongs to the technical field of fastening design, and particularly relates to a locking fastener.

Background

A bolt is a common mechanical part, which is composed of a head and a threaded rod, and is usually matched with a nut to tightly connect two fastened pieces with through holes. The bolt and the nut are connected with the fastened piece in a matched mode, and in some vibrating environments, the bolt and the nut are easy to loosen after long-time vibration, so that the fastening effect on the fastened piece is ineffective, even the bolt and the nut are separated, and serious safety accidents are caused.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

It is an object of the present application to provide a loose fastener to overcome or mitigate at least one of the above-mentioned disadvantages.

The technical scheme of the application is as follows:

a loose-proof fastener comprising:

the bolt is provided with a first connecting section and a second connecting section on a screw rod; the first connecting section is closer to the head of the bolt than the second connecting section, and the diameter of the first connecting section is larger than that of the second connecting section;

the first nut is connected with the first connecting section in a matched mode through first threads;

the second nut is connected with the second connecting section in a matched mode through a second thread and is abutted against the first nut; the first thread is opposite to the second thread.

According to at least one embodiment of the application, the surface of the first nut, which is abutted to the second nut, is printed with a reticulate pattern;

and a reticulate pattern is printed on one surface of the second nut, which is abutted against the first nut.

According to at least one embodiment of the present application, a surface of the first nut abutting against the second nut is a first abutting surface;

one surface of the second nut, which is abutted against the first nut, is a second abutting surface;

the shape of the first abutting surface is matched with that of the second abutting surface.

According to at least one embodiment of the present application, the first abutting surface protrudes in a direction of the second abutting surface to form a first abutting surface protrusion, and the first abutting surface protrusion surrounds a screw of the bolt; the second abutting surface is sunken towards the direction far away from the first abutting surface to form a second abutting surface recess; the first abutting surface is convexly inserted into the second abutting surface recess;

alternatively, the first and second electrodes may be,

the second abutting surface protrudes towards the first abutting surface to form a second abutting surface protrusion, and the second abutting surface protrusion surrounds the screw rod of the bolt; the first abutting surface is sunken towards the direction far away from the second abutting surface to form a first abutting surface recess; the second abutting surface is convexly inserted into the first abutting surface recess.

Drawings

FIG. 1 is a schematic view of the loose fastener and the connected component in cooperation according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a bolt provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first nut provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a second nut provided in an embodiment of the present application;

wherein the content of the first and second substances,

1-a bolt; 2-a first nut; 3-a second nut; 4-a first connected piece, which is provided with a first through hole for the screw rod of the bolt 1 to pass through; 5-a first connected piece, which has a second through hole for the screw of the bolt 1 to pass through.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

The present application is described in further detail below with reference to fig. 1 to 4.

A loose-proof fastener comprising:

the bolt 1 is provided with a first connecting section and a second connecting section on a screw rod; the first connecting section is closer to the head of the bolt 1 than the second connecting section, and the diameter of the first connecting section is larger than that of the second connecting section;

the first nut 2 is connected with the first connecting section in a matched mode through first threads;

the second nut 3 is connected with the second connecting section in a matched mode through second threads and is abutted against the first nut 2; the first thread is opposite to the second thread.

For the above embodiment, as those skilled in the art will readily understand, the first nut 2 abuts against the second nut 3, and the screw thread directions of the first nut 2 and the second nut 3 are opposite, when one of the nuts rotates in the loosening direction, the other nut is driven to rotate in the tightening direction, and the nut will prevent the nut rotating in the loosening direction from further rotating, so as to ensure that the first nut 2 and the second nut 3 can be reliably connected to the bolt 1, and prevent the first nut 2 and the second nut 3 from loosening and separating from the bolt 1.

In some alternative embodiments, the surface of the first nut 2 that abuts against the second nut 3 is printed with a cross-grain;

the surface of the second nut 3, which is in contact with the second nut 2, is printed with a reticulate pattern.

With regard to the above-mentioned embodiment, it can be understood by those skilled in the art that printing a cross text on the surface where the first nut 2 and the second nut 3 abut against each other can increase the friction force between the first nut 2 and the second nut 3, and further ensure the anti-loose effect of the fit between the first nut 2 and the second nut 3.

In some alternative embodiments, the surface of the first nut 2 abutting against the first nut 3 is a first abutting surface;

one surface of the second nut 3, which is abutted with the first nut 2, is a second abutting surface;

In some optional embodiments, the first abutting surface protrudes in the direction of the second abutting surface to form a first abutting surface protrusion, and the first abutting surface protrusion surrounds the screw rod of the bolt 1; the second abutting surface is sunken towards the direction far away from the first abutting surface to form a second abutting surface recess; the first abutting surface is convexly inserted into the second abutting surface recess;

alternatively, the first and second electrodes may be,

the second abutting surface protrudes towards the first abutting surface to form a second abutting surface protrusion, and the second abutting surface protrusion surrounds the screw rod of the bolt 1;

the first abutting surface is sunken towards the direction far away from the second abutting surface to form a first abutting surface recess; the second abutting surface is convexly inserted into the first abutting surface recess.

For the above-mentioned embodiments, the shape of the protrusion of the first abutting surface is conical or annular, and the shape of the recess of the second abutting surface is correspondingly conical or annular groove, in this embodiment, the shape of the protrusion of the first abutting surface is selected to be conical, and the shape of the recess of the second abutting surface is selected to be conical, so as to facilitate the manufacturing, and ensure the effective contact area between the first abutting surface and the second abutting surface.

The shapes of the second abutting surface projection and the first abutting surface recess may be set with reference to the shapes of the first abutting surface projection and the second abutting surface recess.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims

1. A loose-proof fastener, comprising:

the bolt (1) is provided with a first connecting section and a second connecting section on a screw rod; wherein the first connecting section is closer to the head of the bolt (1) than the second connecting section and has a diameter larger than the diameter of the second connecting section;

the first nut (2) is connected with the first connecting section in a matched mode through first threads;

the second nut (3) is connected with the second connecting section in a matched mode through second threads and is abutted against the first nut (2); the first thread is opposite to the second thread.

2. The loose-proof fastener of claim 1,

one surface of the first nut (2) which is abutted against the second nut (3) is printed with a reticulate pattern;

and a cross-hatched pattern is printed on one surface of the second nut (3) which is abutted against the first nut (2).

3. The loose-proof fastener of claim 1,

one surface of the first nut (2) which is abutted with the second nut (3) is a first abutting surface;

one surface of the second nut (3) which is abutted with the first nut (2) is a second abutting surface;

4. The loose-proof fastener of claim 3,

the first abutting surface protrudes towards the second abutting surface to form a first abutting surface protrusion, and the first abutting surface protrusion surrounds a screw rod of the bolt (1);

the second abutting surface is sunken towards the direction far away from the first abutting surface to form a second abutting surface recess; the first abutting surface is convexly inserted into the second abutting surface recess.

5. The loose-proof fastener of claim 3,

the second abutting surface protrudes towards the first abutting surface to form a second abutting surface protrusion, and the second abutting surface protrusion surrounds the screw rod of the bolt (1);