CN203906511U - Combined stop nut and bolt assembly thereof - Google Patents

Abstract

The utility model relates to a combined stop nut and a bolt assembly thereof. The combined stop nut is used for being spirally matched with a screw to implement fastening on an object and comprises a nut body, a stop circular rubber ring and an elastic round pad, wherein the inner wall of one end of the nut body is provided with a coaxial ring-shaped groove and the ring-shaped groove is used for enabling the stop circular rubber ring to be embedded in so as to be in coaxial close fit with the screw passing through the nut body and the stop circular rubber ring; the outer wall of the other end of the nut body is provided with a coaxial V-shaped ring groove and the V-shaped ring groove is used for enabling the elastic round pad to be embedded in so as to be in contact fit with the object to be assembled. The combined stop nut has a simple structure, is reasonably designed, is convenient to use, does not require additional processes, does not require a large assembling space and has high universality.

Description

Combination type stop nut and its bolt assembly

technical field

The utility model relates to the technical field of fasteners, in particular to a combined nut, which has the function of preventing the bolt and the nut from loosening due to external vibration. the

Background technique

Fasteners are elements for connecting and fastening parts. They are widely used in people's life and production. From aviation manufacturing, automobile manufacturing, mechanical assembly, bridge construction, and furniture life, fasteners of different sizes and shapes can be seen. fastener. Fasteners include 12 types of parts, and nuts are one of them. Structurally, the nut has an internal threaded hole, and the shape is generally flat hexagonal column, and there are also flat square column or flat cylinder. It is used to fasten and connect two parts with bolts, studs or machine screws. become a whole. the

The anti-loosening and anti-retreat technology of nuts originated abroad, and was mainly invented to overcome the loosening and falling off of fasteners caused by long-term vibration. This technology uses special engineering plastics to permanently attach to the threads, so that during the tightening process of the internal and external threads, the engineering plastics are squeezed to generate a strong reaction force, which greatly increases the friction between the internal and external threads and provides anti-vibration Absolute resistance, so as to achieve the effect of preventing loosening and retreating. According to the working principle of anti-loosening, it can be divided into three categories: frictional anti-loosening, mechanical anti-loosening and permanent anti-loosening. They are: (1) frictional anti-loosening, this type of anti-loosening causes greater additional friction on the screw pair, commonly used forms include spring washers and double nuts; (2) mechanical anti-loosening, commonly used forms use openings (3) Permanent anti-loosening, so that the screw pair will be permanently damaged, such as welding the screw pair. the

The Chinese utility model patent with the application number 201220111492.8 discloses a backstop bolt. A through groove across the end face is provided at the tail end of the bolt rod. Two ears are formed on both sides of the opening of the through groove. Tighten the nut to achieve the purpose of mechanical anti-loosening. This method requires a deformation and bending process, which increases the assembly man-hour. The Chinese utility model patent with the application number 200820183428.4 discloses a gauge rod anti-loosening anti-retraction nut fastening mechanism, which realizes mechanical anti-loosening by a anti-loosening nut with an open skirt and an anti-retraction washer. This method requires the use of a special anti-retraction washer, which is costly, and the process of bending the anti-loosening wings of the anti-retraction washer is added during assembly, which increases the installation man-hours. In the implementation process of the above-mentioned utility model patent, it is necessary to use a special anti-retraction washer or increase the installation process, which is cumbersome to use, has poor versatility, and is inconvenient to operate in a narrow space, so it is not suitable for installation. the

Utility model content

In order to solve the above problems, the utility model provides a back nut to achieve the purpose of simple structure, convenient installation, cost saving and good versatility. the

In order to achieve the above object, according to one aspect of the utility model, a combination type anti-retraction nut includes a nut body, an elastic circular pad, a non-retreat circular rubber ring, and a coaxial annular groove on the inner wall at one end of the nut body. The circular rubber ring is placed in the annular groove, a coaxial V-shaped ring groove is arranged on the outer wall of the other end of the nut body, and the elastic circular pad is placed in the V-shaped ring groove. the

The structure of the nut body has an internally threaded hole, and the internally threaded hole ensures that the nut can be used in conjunction with various screw rods, bolts, studs and threaded rods with external threads, thereby ensuring its versatility. the

Preferably, the cross-section of the annular groove is rectangular, U-shaped or arc-shaped, and the cross-sectional shape is matched with the back-stopping circular rubber ring. the

Preferably, a circular rubber ring is placed in a coaxial annular groove on the inner wall at one end of the nut body. the

Preferably, the circular apron is in the shape of a ring, and its inner diameter matches the nominal diameter of the upper thread of the screw to ensure that it is attached to the thread, so that the circular apron is squeezed during the tightening process of the internal and external threads. The pressure produces a reaction force, which increases the friction between the internal and external threads, provides absolute resistance to vibration, and thus achieves the effect of preventing loosening and retreating. the

Preferably, a coaxial V-shaped ring groove is provided on the outer wall of the other end of the nut body, and an elastic circular pad is placed in the V-shaped ring groove. The V-shaped ring groove is inclined on the outer wall, which is easy to block the elastic circular pad, and The elastic washer then presents a certain angle, so that the elastic washer is easier to be squeezed and deformed during the thread tightening process, resulting in a reverse force, increasing the friction between the internal and external threads, and providing absolute resistance to vibration , so as to achieve the effect of preventing loosening and retreating. the

Preferably, the material of the elastic circular pad placed in the V-shaped ring groove on the outer wall of the other end of the nut body is rubber, and the rubber material has good deformation ability, and is convenient to be placed in the V-shaped groove, that is, it is convenient to assemble and saves time. Save effort. the

According to another aspect of the present utility model, there is provided a nut-bolt matching assembly, which is characterized in that it includes the bolt and the above-mentioned combined anti-back nut, and the combined anti-back nut is screwed on the bolt On the screw rod, it cooperates to realize the fastening and anti-retreat effect. the

Preferably, one end of the bolt has a bolt head, and the bolt head includes an outer regular hexagonal cylinder and a regular hexagonal cylinder hole in the head, that is, the bolt head is an outer hexagonal bolt head with an inner hexagonal hole, and a circular washer is set on the screw rod. The combined action of the circular washer and the combined anti-retraction nut further increases the friction between the friction pairs and enhances the anti-retraction and anti-loosening function. the

The anti-retraction and anti-loosening principle of the anti-retraction nut of the utility model is: when in use, the combined type anti-retraction nut is directly tightened with the screw rod that matches the thread, and the anti-retraction circular rubber ring and the elastic washer produce a reaction during the thread locking process. The force increases the friction between the thread pairs, provides resistance to vibration, and achieves the effect of preventing back and forth. the

Compared with the common nuts of those skilled in the art, the combined anti-retraction nut of the present utility model is provided with an annular groove and a V-shaped ring groove, and the anti-retraction circular rubber ring and the elastic washer are respectively placed, and the structure is simple and the design is reasonable. Easy to use, no additional process, no large assembly space, and strong versatility. the

Description of drawings

Fig. 1 is the structural schematic diagram of the combination type stop nut of the utility model embodiment;

Fig. 2 is the nut body structural representation of the utility model embodiment;

Fig. 3 is a structural schematic diagram of the connection between the combined anti-retraction nut and the bolt in the embodiment of the utility model. the

In all the drawings, the same reference numerals represent the same technical features, wherein 1 is a circular backstop rubber ring, 2 is a nut body, 3 is an elastic round washer, and 4 is a coaxial annular groove on the inner wall of one end of the nut body , 5 is the coaxial V-shaped ring groove on the outer wall of one end of the nut body, 6 is a combined type stop nut, which is obtained by combining the technical features represented by marks 1, 2, and 3, 7 is a screw rod, 8 is an elastic washer, 9 10 is a regular hexagonal cylinder outside the bolt head, and 10 is a regular hexagonal cylinder hole in the bolt head. the

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

As shown in Figures 1 and 2, the combined anti-retraction nut includes a nut body 2, a coaxial annular groove 4 on the inner wall of one end of the nut body, with a U-shaped cross section, and a V-shaped ring groove 5 on the outer wall of the other end of the nut body, elastic Round pad 3, stop circular rubber ring 1. The anti-retraction circular rubber ring 1 is placed in the U-shaped groove, and the elastic circular pad 3 is placed in the V-shaped groove 5 . The specification of the combination back nut is preferably M12, but it is not limited to this specification, and other dimensions and specifications are also applicable. the

As shown in Figure 3, the combination type stop nut 6 is screwed on a bolt, the specification of the bolt is preferably M12, but it is not limited to this specification, other sizes and specifications are also applicable, as long as the combination type stop nut and Bolt specifications can be matched. The screw thread on the bolt shank 7 matches the internal thread of the combination back nut. The outer shape of the bolt head is a regular hexagonal cylinder 9, and the inside is a regular hexagonal cylinder hole 10. The design of the bolt head is for installation and installation. To disassemble, use a wrench or/and other tools to easily hold to rotate the screw. Elastic washer 8 is with on the bolt. the

The installation process is as follows: first, place the anti-retraction circular rubber ring 1 in the U-shaped groove 4, place the elastic circular pad 3 in the V-shaped groove 5, and put it aside for use. Then the elastic washer 8 is sleeved on the bolt rod 7 to make it contact the regular hexagonal cylinder 9, and then the screw rod is passed through the mounting hole. Finally, directly tighten the combination anti-retraction nut 6 on the screw rod 7 to complete the tightening process. the

Since in the fastening process, the anti-retraction rubber ring 1, the elastic circular pad 3 and the elastic washer 8 are used respectively, the reaction force in the thread locking process is provided from multiple places, thereby increasing the friction between the thread pairs, This frictional force increases the resistance to loosening, and achieves the effect of preventing back and loosening. the

The screw rod described in the utility model is a rod-shaped object with an external thread, which can cooperate with a combined anti-retraction nut to realize fastening effect, including studs, double-ended studs, bolts, tooth bars, screws and the like. the

The coaxial annular groove 4 on the inner wall of one end of the nut body described in the utility model is not limited to the U-shaped cross section described in the above-mentioned embodiment, but can also be other shapes, such as rectangle, circular ring, etc., as long as It can cooperate with the anti-retraction circular rubber ring 1 so that it can be embedded in a shape. the

The above-mentioned embodiments only express the implementation manner of the present utility model, and its description is relatively specific and detailed, but it should not be interpreted as limiting the patent scope of the present utility model. It should be pointed out that those skilled in the art can make some modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims. the

Claims (6)

1. a combined anti-return nut, for coordinate to realize fastening to object with screw spiral, it is characterized in that, comprise nut body (2), the circular cushion rubber (1) of retaining and elasticity planchet (3), wherein, the inwall of described nut body (2) one end has coaxial annular groove, be used for the circular cushion rubber (1) of described retaining thereby embed wherein and with the screw coaxial through nut body (2) and this retaining circle cushion rubber (1) closely cooperating, on the outer wall of described nut body (2) the other end, have coaxial V-type annular groove (3), for described elasticity planchet (3), embed wherein to contact cooperation with described object.

2. a kind of combined anti-return nut according to claim 1, is characterized in that, described annular groove cross section is rectangle, U-shaped or circular arc.

3. a kind of combined anti-return nut according to claim 1 and 2, is characterized in that, the circular cushion rubber of described retaining (1) is circular, and its internal diameter mates with screw rod external diameter.

4. a kind of combined anti-return nut according to claim 1 and 2, is characterized in that, the material of described elasticity planchet (3) is rubber.

5. a bolt assembly, it is characterized in that, comprise the combined anti-return nut (6) described in any one in bolt and claim 1-4, by described combined anti-return nut (6) screw-casing be connected on described bolt screw rod (7) thus the upper secure fit realizing object.

6. a kind of bolt assembly according to claim 5, it is characterized in that, described bolt one end has bolt head, this bolt head is positive hexagonal prism body (9), this positive hexagonal prism end of body has positive hexagonal prism body endoporus (10), is set with the rounded washers (8) for contacting with object on the screw rod of described bolt (7).