CN219388404U - Vibration-proof bolt and nut structure - Google Patents

Abstract

The utility model relates to the technical field of fastening components, in particular to a vibration-proof bolt-nut structure, which comprises a bolt and a polygonal inner nut which are connected together through threads, wherein a component to be fastened is arranged between the bolt head of the bolt and the inner nut on the bolt, an outer nut is connected to the position, close to the polygonal inner nut, of the bolt in a threaded manner, polygonal grooves matched with the polygonal inner nut are formed in the outer nut, two nuts are arranged on the outer nut, and polygonal grooves capable of limiting the polygonal inner nut are formed in the outer nut, so that the outer nut has a strong limiting fastening effect on the polygonal inner nut, the device is not easy to loosen under the condition of impact or high-frequency vibration, the reliability of the device is ensured, and through the arrangement of a protective pad made of polyurethane materials, the protective pad has oil absorption, the influence of oily substances on the fastening effect of the bolt-nut on the device is reduced, and meanwhile, the protective pad arranged on the device is prevented from being polluted by the easy-break grooves.

Description

Vibration-proof bolt and nut structure

Technical Field

The utility model relates to the technical field of fastening components, in particular to a vibration-proof bolt and nut structure.

Background

The fastener is a general name of a mechanical part adopted when two or more parts (or components) are fastened and connected into a whole, the function of a nut screw is to fasten or connect other parts or objects, the nut is used by matching an inner threaded hole with bolts, studs or mechanical screws of the same specification and the like, so as to fasten and connect two parts, different types of nuts are different in specific application and application fields, such as nylon lock nuts, namely nylon rubber rings are inlaid in hexagonal surfaces, the nut is a structure for preventing threads from loosening, the nut is commonly used on strong power machinery, the flange nut can play a role of increasing the contact surface with workpieces, and the nut is mostly used on pipelines, fasteners, stamping parts and cast parts.

The bolt and nut connection is a wide connection mode in the technical field of machinery, is mainly used for installation and fastening of various structures, and in the use process of general bolt and nut, when encountering high-frequency vibration or impact, the bolt and nut is easy to loose, so that the fixing effect of parts is not ideal, and the operation reliability of the device is affected, so that a novel vibration-proof bolt and nut structure is urgently needed.

Disclosure of Invention

The utility model aims to provide a vibration-proof bolt and nut structure for solving the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a vibration-proof bolt-nut structure, comprising: the bolt is connected with the polygonal inner nut through threads, a part to be fastened is arranged between the bolt head of the bolt and the inner nut, an outer nut is connected with the bolt through threads at the position, close to the polygonal inner nut, of the bolt, and a polygonal groove matched with the polygonal inner nut is formed in the outer nut.

Preferably, the polygonal groove and the polygonal inner nut are equilateral hexagons, the distance between the opposite sides of the polygonal groove is larger than the distance between the opposite sides of the polygonal inner nut, and the distance between the opposite sides of the polygonal groove is smaller than the distance between the opposite sides of the polygonal inner nut.

Preferably, the lateral side of the outer nut is provided with anti-skid patterns.

Preferably, anti-slip pads are arranged on the bolt at two opposite sides of the polygonal inner nut.

Preferably, the anti-slip pad is made of polyurethane material.

Preferably, the anti-slip pad is provided with an easy-break groove, and two sides of the anti-slip pad are symmetrically provided with protruding parts.

Preferably, a plurality of observation holes are formed in the polygonal inner nut, and a plurality of color bars are arranged on the bolt.

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

1. through setting up two nuts, and have the polygon groove that can restrict the polygon internal nut on the external nut to make the external nut have stronger restriction fastening effect to the polygon internal nut, under the circumstances that receives striking or high frequency vibration, be difficult for not hard up, guaranteed the reliability of device.

2. Through setting up polyurethane material's protection pad, make the protection pad possess the oil absorption, reduce the influence of oily material on the device to bolt and nut fastening effect, the frangible groove of protection pad setting can be through pulling the bulge simultaneously, makes protection pad disconnection separation, gets rid of the protection pad fast, avoids being infected with the reliability of the protection pad influence device of excessive oily material.

Drawings

FIG. 1 is a schematic diagram of a front view structure of the present utility model;

FIG. 2 is a schematic view of the bottom structure of the outer nut of the present utility model;

fig. 3 is a schematic top view of the protection pad of the present utility model.

In the figure: 1. a bolt; 11. color bars; 2. a polygonal inner nut; 21. an observation hole; 22. polygonal grooves; 3. an outer nut; 31. anti-skid lines; 4. a protective pad; 41. a protruding portion; 42. and (5) a breakable groove.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Embodiments of the present utility model are intended to be within the scope of the present utility model as defined by the appended claims.

Referring to fig. 1 and 2, the present utility model provides a vibration-proof bolt and nut structure, comprising: the bolt 1 and the polygonal internal nut 2 which are connected together through threads are arranged between the bolt head of the bolt 1 and the internal nut 2 on the bolt 1, the bolt head and the polygonal internal nut 2 are tightly abutted against the parts needing to be fastened, the fastening effect is achieved, the external nut 3 is connected to the position, close to the polygonal internal nut 2, of the bolt 1 through threads, the polygonal groove 22 matched with the polygonal internal nut 2 is arranged on the external nut 3, the external nut 3 is rotated, the internal nut 2 enters the polygonal groove 22, the limiting effect of the external nut 3 on the polygonal internal nut 2 is achieved, the polygonal groove 22 and the polygonal internal nut 2 are of an equilateral hexagon, the relative side distance of the polygonal groove 22 is larger than the relative side distance of the polygonal internal nut 2, and the relative side distance of the polygonal groove 22 is smaller than the relative angle distance of the polygonal internal nut 2, so that the polygonal internal nut 2 can enter the polygonal groove 22, and the polygonal groove 22 can limit the polygonal internal nut 2.

Referring to fig. 1, anti-slip patterns 31 are provided on the side of the outer nut 3 to increase the friction force of the outer nut 3, so as to facilitate rotation of the outer nut 3.

Referring to fig. 1, anti-slip pads 4 are arranged on two opposite sides of a polygonal inner nut 2 on a bolt 1, the anti-slip pads play a role in increasing friction force and enhancing fastening effect, the anti-slip pads 4 are made of polyurethane materials, the polyurethane materials have high toughness and certain oil absorption, the influence of oily substances on the device on the fastening effect of the bolt and the nut is reduced, frangible grooves 42 are formed in the anti-slip pads 4, protruding portions 41 are symmetrically arranged on two sides of the anti-slip pads 4, the anti-slip pads 3 can be disconnected and separated by pulling the protruding portions 41, the anti-slip pads 4 are removed rapidly, and the influence of the anti-slip pads 4 stained with excessive oily substances on the reliability of the device is avoided.

Referring to fig. 1, a plurality of observation holes 21 are formed in the polygonal inner nut 2, a plurality of color bars 11 are formed in the bolt 1, colors of the adjacent color bars 11 are different, and after fastening is completed, whether the device is loose or not can be observed through the observation holes 21, so that timely adjustment is facilitated.

Working principle: the bolt head and the polygonal inner nut 2 are tightly abutted against the parts needing to be fastened, the fastening effect is achieved, the outer nut 3 is rotated, the inner nut 2 enters the polygonal groove 22, the limiting effect of the outer nut 3 on the polygonal inner nut 2 is achieved, the polygonal groove 22 capable of limiting the polygonal inner nut 2 is arranged on the outer nut, the outer nut 3 has a strong limiting fastening effect on the polygonal inner nut 2, and the device is difficult to loosen under the condition of being impacted or vibrated at high frequency, so that the reliability of the device is guaranteed.

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

Claims (7)

1. The utility model provides a vibration-proof type bolt nut structure which characterized in that: comprising the following steps: the bolt comprises a bolt (1) and a polygonal inner nut (2) which are connected together through threads, wherein a part to be fastened is arranged between the bolt head of the bolt (1) and the inner nut (2) on the bolt (1), an outer nut (3) is connected to the position, close to the polygonal inner nut (2), on the bolt (1) through threads, and a polygonal groove (22) matched with the polygonal inner nut (2) is formed in the outer nut (3).

2. The vibration-proof bolt-nut structure according to claim 1, characterized in that: the polygonal groove (22) and the polygonal inner nut (2) are equilateral hexagons, the distance between the opposite sides of the polygonal groove (22) is larger than the distance between the opposite sides of the polygonal inner nut (2), and the distance between the opposite sides of the polygonal groove (22) is smaller than the distance between the opposite sides of the polygonal inner nut (2).

3. The vibration-proof bolt-nut structure according to claim 1, characterized in that: the side of the outer nut (3) is provided with anti-skid patterns (31).

4. The vibration-proof bolt-nut structure according to claim 1, characterized in that: and anti-slip pads (4) are arranged on two opposite sides of the polygonal inner nut (2) on the bolt (1).

5. The vibration-proof bolt-nut structure according to claim 4, wherein: the anti-slip pad (4) is made of polyurethane materials.

6. The vibration-proof bolt-nut structure according to claim 4, wherein: the anti-slip pad (4) is provided with an easy-break groove (42), and protruding parts (41) are symmetrically arranged on two sides of the anti-slip pad (4).

7. The vibration-proof bolt-nut structure according to claim 1, characterized in that: a plurality of observation holes (21) are formed in the polygonal inner nut (2), and a plurality of color bars (11) are arranged on the bolt (1).