CN205478843U - A locknut - Google Patents

Abstract

The utility model relates to an anti-loosening nut, which belongs to the field of machinery. The utility model comprises a hexagonal nut and a round boss; the hexagonal nut is located at the non-fastening end, the round boss is located at the fastening end, and the hexagonal nut has threads inside. The front end surface of the head of the circular boss is a tapered surface, and the inner hole has a groove. The utility model has the advantages of simple structure and convenient use; when the thread teeth of the bolt and the nut become slightly loose due to reasons such as vibration and sliding, the elastic deformation force still exists, thereby ensuring that the frictional self-locking effect between the thread teeth is still effective, achieving The purpose of anti-loosening.

Description

A locknut

technical field

The utility model relates to an anti-loosening nut, which belongs to the field of machinery.

Background technique

Bolt and nut fastening is the most common way of connecting and fastening parts in the mechanical field. The bolt and nut rely on the frictional self-locking effect between the thread teeth to ensure the fastening of the connection. In engineering practice, changes in working conditions such as mechanical vibration, material creep failure, stress relaxation, and material corrosion may lead to loosening of bolts and nuts, and even nuts fall off, causing safety problems and accidents. Common anti-loosening methods include adding spring washers, elastic washers, lock washers and stop washers. The method of adding washers meets different requirements by selecting different combinations of bolts, washers and nuts. The disadvantage is that the correct selection of washers depends largely on experience and professional knowledge.

Contents of the invention

The utility model provides an anti-loosening nut, which is used for solving the loosening problem of bolt connection.

The technical scheme of the utility model is: a lock nut, including a hexagonal nut 11 and a round boss 12;

The hexagonal nut 11 is located at the non-fastening end, the round boss 12 is located at the fastening end, and the hexagonal nut 11 has threads 15 inside.

The front end surface of the head of the circular boss 12 is a tapered surface 13, and the inner hole has a groove 14.

The working principle of the utility model is:

When the nut is tightened, the conical surface 13 at the front end of the circular boss 12 bears against the surface of the connected part, elastic deformation occurs at the groove 14 in the inner hole of the circular boss 12, and the entire circular boss 12 is sunken inward, so that the surface of the connected part and the nut There is always a certain elastic force between them; when the threaded connection becomes loose due to vibration and sliding, the elastic deformation force can compress the connected parts to a certain extent to prevent loosening.

The beneficial effects of the utility model are: simple structure, easy to use; when a small amount of looseness occurs between the threaded teeth of the bolt and the nut due to vibration and sliding, the elastic deformation force still exists, thereby ensuring the frictional self-locking between the threaded teeth The effect is also effective, and the purpose of anti-loosening is achieved.

Description of drawings

Fig. 1 is a structural diagram of the utility model;

Fig. 2 is the measuring view of the utility model;

Fig. 3 is the use schematic diagram of the utility model;

Fig. 4 is the partial enlarged view of the utility model;

Each label in the figure: 11-hex nut, 12-circular boss, 13-taper, 14-groove, 15-thread, 2-bolt, 3-A connected part, 4-B connected part.

detailed description

Embodiment 1: As shown in Figures 1-4, a lock nut includes a hex nut 11 and a round boss 12;

The hexagonal nut 11 is located at the non-fastening end, the round boss 12 is located at the fastening end, and the hexagonal nut 11 has threads 15 inside.

The front end surface of the head of the circular boss 12 is a tapered surface 13, and the inner hole has a groove 14.

Embodiment 2: As shown in Figures 1-4, a lock nut includes a hex nut 11 and a round boss 12;

The hexagonal nut 11 is located at the non-fastening end, the round boss 12 is located at the fastening end, and the hexagonal nut 11 has threads 15 inside.

Embodiment 3: As shown in Figures 1-4, a lock nut includes a hex nut 11 and a round boss 12;

The hexagonal nut 11 is located at the non-fastening end, the round boss 12 is located at the fastening end, and the hexagonal nut 11 has threads 15 inside.

The front end surface of the head of the circular boss 12 is a tapered surface 13, and the inner hole has a groove 14.

As shown in FIG. 3 , the A connected part 3 and the B connected part 4 are fastened by locknuts and bolts 2 .

As shown in FIG. 4 , when the bolt is tightened, the head of the round boss 12 of the locknut is deformed by force, and the contour becomes the contour shown by 1 ′.

The specific implementation of the utility model has been described in detail above in conjunction with the drawings, but the utility model is not limited to the above-mentioned implementation, and within the knowledge of those of ordinary skill in the art, it can also be used without departing from the purpose of the utility model. Make various changes below.

Claims (2)

1. a stop nut, it is characterised in that: include hex nut (11), circular bosses (12)；

Described hex nut (11) is positioned at non-fastening end, and circular bosses (12) is positioned at fastening end, has screw thread (15) in hex nut (11).

Stop nut the most according to claim 1, it is characterised in that: described circular bosses (12) head front end face is the conical surface (13), endoporus fluted (14).