CN213839204U - Internal and external thread fastener - Google Patents

Abstract

The utility model relates to an inside and outside tooth threaded fastener, including nut and double-screw bolt, be equipped with first through-hole in the nut, be equipped with the second through-hole in the double-screw bolt, the surface of double-screw bolt is equipped with the external screw thread, the internal surface of second through-hole is equipped with the internal thread. The fastener of this scheme is through setting up the external screw thread at the surface of double-screw bolt to realize the basic function of bolt. A first through hole and a second through hole are respectively formed in the inner surface of the nut and the inner surface of the stud, and internal threads are arranged in the second through hole, so that the stud can also be used as a nut. The combined use of internal thread and external screw thread can further increase the service function of this fastener to reach better result of use, have more extensive application range.

Description

Internal and external thread fastener

Technical Field

The utility model belongs to the technical field of five metals fastener, especially, relate to inside and outside tooth threaded fastener.

Background

The fastener is a mechanical part which is used for fastening connection and has extremely wide application. The fastener is widely used in the industries including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, molds, hydraulic pressure and the like, and various fasteners can be seen on various machines, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, instruments, supplies and the like, and are the most widely applied mechanical basic parts. It features various varieties and specifications, different functions and usages, and very high standardization, serialization and universalization degrees. Common fasteners in the market comprise bolts, studs and the like, and the functions of all the fasteners are single.

SUMMERY OF THE UTILITY MODEL

The utility model provides an inside and outside tooth threaded fastener for solve among the prior art technical problem of bolt structure function singleness.

The utility model discloses an inside and outside tooth threaded fastener, including nut and double-screw bolt, be equipped with first through-hole in the nut, be equipped with the second through-hole in the double-screw bolt, the surface of double-screw bolt is equipped with the external screw thread, the internal surface of second through-hole is equipped with the internal thread.

Preferably, the central axis of the first through hole and the central axis of the second through hole are on the same straight line.

Preferably, the nut and the stud are of an integrally formed structure.

Preferably, the pitch of the external thread is greater than the pitch of the internal thread.

Preferably, a transition area which is in contact with the nut is further arranged on the stud, internal threads are arranged on the inner surface of the transition area, and external threads are not arranged on the outer surface of the transition area.

Preferably, the outer diameter of the transition area becomes gradually larger along the direction from the stud to the nut.

Preferably, the outer diameter of the transition zone is constant in the stud-to-nut direction.

Preferably, the first through hole has a regular hexagonal shape.

Preferably, the first through hole has an irregular shape.

Preferably, the outer surface of the stud is covered with a blue glue layer.

From the aforesaid the embodiment of the utility model provides a can know, the fastener of this scheme is through setting up the external screw thread at the surface of double-screw bolt to realize the basic function of bolt. A first through hole and a second through hole are respectively formed in the inner surface of the nut and the inner surface of the stud, and internal threads are arranged in the second through hole, so that the stud can also be used as a nut. The combined use of internal thread and external screw thread can further increase the service function of this fastener to reach better result of use, have more extensive application range.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of an internal and external thread fastener according to the present invention;

FIG. 2 is a schematic cross-sectional view of a first embodiment of the male and female threaded fastener of the present invention;

FIG. 3 is a schematic top view of a first embodiment of the male and female threaded fastener of the present invention;

FIG. 4 is a schematic cross-sectional view of a second embodiment male and female threaded fastener of the present invention;

fig. 5 is a schematic top view of a male and female threaded fastener according to a second embodiment of the present invention.

Description of the main element symbols:

10. a nut; 20. a stud; 30. a transition zone; 11. a first through hole; 21. a second through hole; 22. an internal thread; 23. and (4) external threads.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention discloses an internal and external thread fastener, which includes a nut 10 and a stud 20, wherein a first through hole 11 is provided in the nut 10, a second through hole 21 is provided in the stud 20, an external thread 23 is provided on the outer surface of the stud 20, and an internal thread 22 is provided on the inner surface of the second through hole 21.

Compared with the prior art, the fastening piece of the scheme realizes the basic function of the bolt by arranging the external thread 23 on the outer surface of the stud 20. The inner surface of the nut 10 and the inner surface of the stud 20 are respectively provided with a first through hole 11 and a second through hole 21, and the second through hole 21 is internally provided with an internal thread 22, so that the stud 20 can also be used as a nut. The combination of the internal thread 22 and the external thread 23 can further increase the use function of the fastener, so as to achieve better use effect and have wider use range.

In the present embodiment, the central axis of the first through hole 11 and the central axis of the second through hole 21 are on the same straight line. The central axis of the first through hole 11 and the central axis of the second through hole 21 determine the opening directions of the first through hole 11 and the second through hole 21, and the opening direction of the first through hole 11 is consistent with the opening direction of the second through hole 21, so that better insertion and fixation of other bolts or fastening structures can be ensured.

In the present embodiment, the nut 10 and the stud 20 are integrally formed. The nut 10 and the stud 20 are integrally formed, so that the connection strength between the nut 10 and the stud 20 can be better ensured, the fracture is avoided, and the one-time processing and forming are convenient.

In the present exemplary embodiment, the pitch of the external thread 23 is greater than the pitch of the internal thread 22. The pitch of the external thread 23 and the pitch of the internal thread 22 can be adjusted as the case may be.

In this embodiment, in the first embodiment of the present invention, the stud 20 is further provided with a transition region 30 contacting with the nut 10, the inner surface of the transition region 30 is provided with the internal thread 22, and the outer surface of the transition region 30 is free of the external thread 23.

Referring further to fig. 2-3, in a first embodiment of the present invention, the outer diameter of the transition area 30 is constant along the direction from the stud 20 to the nut 10 to adapt to the shape of the inner surface of the component part matching the external thread 23. The first through hole 11 has a regular hexagonal shape and can be screwed and fixed or loosened by various tools.

Referring further to fig. 4-5, in a second embodiment of the present disclosure, corresponding part name labels in the second embodiment are consistent with those in the first embodiment. The outer diameter of the transition area 30 becomes larger in the direction from the stud 20 to the nut 10. The transition area 30 has a gradually increasing outer diameter to better increase the strength of the connection between the nut 10 and the stud 20. The shape of the first through hole 11 is irregular, and a special tool is needed to operate during screwing.

In the above embodiment, the outer surface of the stud 20 is covered with a layer of blue glue. The blue glue layer can be used as an anti-rust layer for placing the external thread 23 to rust.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Above is the description to the technical scheme that the utility model provides, to technical personnel in the field, according to the utility model discloses the thought of embodiment all has the change part on concrete implementation and range of application, to sum up, this description content should not be understood as the restriction of the utility model.

Claims (7)

1. The internal and external thread fastener is characterized by comprising a nut and a stud, wherein a first through hole is formed in the nut, a second through hole is formed in the stud, external threads are formed on the outer surface of the stud, and internal threads are formed on the inner surface of the second through hole;

the stud is also provided with a transition area which is in contact with the nut, the inner surface of the transition area is provided with internal threads, and the outer surface of the transition area is free of external threads; the outer diameter of the transition area is gradually increased along the direction from the stud to the nut.

2. The male and female threaded fastener according to claim 1, wherein the central axis of the first through-hole is collinear with the central axis of the second through-hole.

3. The male and female threaded fastener of claim 1, wherein said nut is of integral construction with said stud.

4. The internally and externally threaded fastener according to claim 1 wherein the pitch of the external threads is greater than the pitch of the internal threads.

5. The male and female threaded fastener according to claim 1, wherein the first through-hole has a regular hexagonal shape.

6. The male and female threaded fastener according to claim 1, wherein the first through-hole has an irregular shape.

7. The internally and externally threaded fastener according to claim 1 wherein the outer surface of the stud is coated with a layer of blue glue.

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