CN210769790U

CN210769790U - Self-locking nut

Info

Publication number: CN210769790U
Application number: CN201921311547.8U
Authority: CN
Inventors: 李大龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-06-16
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a from locking-type nut, its characterized in that: the nut comprises a large nut (1), a sinking groove (2) is formed in one end face of the large nut (1), the thickness of the large nut (1) is h, the depth of the sinking groove (2) is 0.3-0.4h, the sinking groove (2) is hexagonal, a small nut (3) is connected in the sinking groove (2) in an interference fit mode, the thickness of the small nut (3) is 0.4-0.5h, the end face of the small nut (3) protrudes out of the end face of the large nut (1), the protruding height is 0.05-0.1h, internal threads of the large nut (1) and the small nut (3) are continuous, and the hardness of the small nut (3) is smaller than that of the large nut (1). The self-locking nut is simple in structure, ingenious in design and low in cost, and can effectively ensure that the nut cannot be loosened after connection.

Description

Self-locking nut

Technical Field

The utility model relates to a fastener field, especially a from locking-type nut.

Background

The nut is a part for tightly connecting mechanical equipment, can be connected with a bolt with the same specification into an integral structure through the inner threads, and is one of the most common fasteners together with the bolt. After the nut is in threaded connection with the bolt, looseness easily occurs due to vibration and the like, and serious safety accidents can be caused due to looseness of the fastener, so that the problem needing to be solved in the fastener industry is always solved by how to ensure that the bolt and the nut are not loosened after connection. Various self-locking nuts are now available on the market, which, although they have a function of preventing loosening, do so at the expense of destroying the bolt. After the nut is forcibly detached from the bolt, the bolt cannot be continuously used due to the fact that threads on the bolt are damaged, waste is caused, and the operation cost of an enterprise is relatively increased. There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The utility model relates to a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit, low cost, and can effectively guarantee to connect the back can not become flexible from locking-type nut.

The technical solution of the utility model is that: a self-locking nut is characterized in that: the nut comprises a large nut 1, a sinking groove 2 is formed in one end face of the large nut 1, the thickness of the large nut 1 is h, the depth of the sinking groove 2 is 0.3-0.4h, the sinking groove 2 is hexagonal, a small nut 3 is connected in the sinking groove 2 in an interference fit mode, the thickness of the small nut 3 is 0.4-0.5h, the end face of the small nut 3 protrudes out of the end face of the large nut 1, the protruding height is 0.05-0.1h, internal threads of the large nut 1 and the small nut 3 are continuous, and the hardness of the small nut 3 is smaller than that of the large nut 1.

Compared with the prior art, the utility model, have following advantage:

the self-locking nut with the structural form has the advantages that the structure is simple, the design is ingenious, the layout is reasonable, compared with the traditional self-locking nut, the self-locking nut is characterized in that a special structure combined by large and small nuts is adopted, the two nuts are connected into an integral structure in an interference fit mode, holes are drilled and reamed simultaneously, a complete internal thread is formed inside the two nuts, meanwhile, the hardness of the material used by the small nut is smaller than that of the material used by the large nut, so that the small nut can deform to a certain extent after being screwed, self-locking is realized through the deformation, and the nut can not loosen in a vibration environment. The bolt and nut fastener loosening problem can be solved, and the bolt is protected. Because the manufacturing cost of the bolt is generally higher than that of the nut, the self-locking nut can save the cost to a certain extent. Therefore, the method has multiple advantages, is particularly suitable for popularization and application in the field, and has very wide market prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention (a large nut is separated from a small nut).

Fig. 2 is a schematic structural diagram of an embodiment of the present invention (a large nut is connected with a small nut).

Detailed Description

The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1 and 2: a self-locking nut comprises a large nut 1, wherein a sunk groove 2 is formed in one end face of the large nut 1, the thickness of the large nut 1 is h, the depth of the sunk groove 2 is 0.3-0.4h, the sunk groove 2 is hexagonal, a small nut 3 is connected in the sunk groove 2 in an interference fit mode, the thickness of the small nut 3 is 0.4-0.5h, the end face of the small nut 3 protrudes out of the end face of the large nut 1, the protruding height is 0.05-0.1h, internal threads of the large nut 1 and the small nut 3 are continuous, and the hardness of the small nut 3 is smaller than that of the large nut 1.

Firstly, connecting small nuts 3 in a sink groove 2 in an interference fit mode, then drilling and reaming the large and small nuts connected into an integral structure to form a complete and continuous internal thread on the inner walls of the large and small nuts, wherein the hardness of the material for manufacturing the small nuts 3 is smaller than that of the material for manufacturing the large nuts 1, and if the large nuts 1 are made of 45CrMo (HRC: 32-38), the small nuts are made of 10-grade steel or purple steel (HRC is smaller than 90);

when in use, the self-locking nut is connected to a bolt in a threaded manner in a way that the small nut 3 faces the head of the bolt, and is screwed tightly;

because the hardness of the material used by the small nut 3 is relatively small, the small nut 3 can be irreversibly deformed after torque is applied to the nut, and the internal thread on the inner wall of the small nut 3 is deformed and occluded on the external thread of the bolt, thereby realizing self-locking;

when needs are dismantled, utilize this nut of instrument counter rotation such as spanner, the nut withdraws from the bolt after, little nut 3 part is destroyed, can't continue to use, when using next time, only need to change a new this kind of nut can.

Claims

1. A self-locking nut is characterized in that: the nut comprises a large nut (1), a sinking groove (2) is formed in one end face of the large nut (1), the thickness of the large nut (1) is h, the depth of the sinking groove (2) is 0.3-0.4h, the sinking groove (2) is hexagonal, a small nut (3) is connected in the sinking groove (2) in an interference fit mode, the thickness of the small nut (3) is 0.4-0.5h, the end face of the small nut (3) protrudes out of the end face of the large nut (1), the protruding height is 0.05-0.1h, internal threads of the large nut (1) and the small nut (3) are continuous, and the hardness of the small nut (3) is smaller than that of the large nut (1).