CN218440167U

CN218440167U - Internal thread with self-locking function

Info

Publication number: CN218440167U
Application number: CN202222987469.1U
Authority: CN
Inventors: 牛格强; 王凯
Original assignee: Suzhou Putuo Electromechanical Co ltd
Current assignee: Suzhou Putuo Electromechanical Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-02-03
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses an internal thread with self-locking function, including bolt, external screw thread, base, screw hole, first internal thread and second internal thread, first internal thread has been seted up to the inside of screw hole, and the external screw thread meshing connects in first internal screw thread inside, first internal screw thread one side is provided with the second internal thread, and the external screw thread meshing connects in the internal portion of second, the thread size of external screw thread is M12, and the pitch is the 1.5mm of standard, first internal screw thread size is M12, and the pitch is the 1.5mm of standard, the internal thread size of second is M12, and the pitch is the 1.41mm of standard, the utility model discloses compare in traditional locking self-locking screw thread, adopt the mode of processing out the same size but two kinds of screw threads of pitch difference in a screw hole simultaneously, through second internal thread part and connecting bolt produce great friction torque in effective moment, reach auto-lock and purpose of auto-lock.

Description

Internal thread with self-locking function

Technical Field

The utility model relates to a mechanical fastener technical field, in particular to internal thread with self-locking function.

Background

The threaded fastener is the most common connecting piece, the same standard is basically adopted in consideration of universality, the threaded fastener is suitable for mechanical fastening threaded connection of general purposes, although the threaded connection of the general fastener can meet self-locking conditions and cannot be automatically loosened, under vibration or impact load or large temperature change, a connecting nut can gradually loosen to cause threaded connection failure and sometimes serious consequences can be caused, the main reason of the threaded loosening is caused by relative rotation between thread pairs, therefore, in actual design, anti-loosening measures are required, the common self-locking threads are firmly applied on the market, the threads are special-shaped threads, cannot be processed by a standard screw tap and cannot be detected by a standard thread stop gauge, and other various methods such as double-nut splicing brake, strong glue bonding and the like have the conditions of complicated structure and difficult installation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an internal thread with self-locking function to solve the problem of proposing among the above-mentioned background art.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides an internal thread with self-locking function, includes bolt, external screw thread, base, screw hole, first internal thread and second internal thread, threaded hole is seted up to one side of base, and the internally mounted of screw hole has the bolt, is provided with the external screw thread on the bolt, and external screw thread threaded connection is in the inside of screw hole.

Preferably, a first internal thread is formed in the threaded hole, and the external thread is meshed with the inside of the first internal thread.

Preferably, a second internal thread is arranged on one side of the first internal thread, and the external thread is connected to the inside of the second internal thread in a meshing manner.

Preferably, the thread size of the external thread is M12, and the thread pitch is standard 1.5mm.

Preferably, the thread size of the first internal thread is M12, and the thread pitch is standard 1.5mm.

Preferably, the thread size of the second internal thread is M12, and the thread pitch is 1.41mm.

The utility model provides a pair of internal thread with self-locking function, its advantage lies in: the utility model discloses compare in traditional locking self-locking screw thread, adopt the mode that processes out the same size but two kinds of screw threads that the pitch is different in a screw hole simultaneously, through the second internal thread part and connecting bolt produce great friction torque promptly at effective moment, reach the purpose of locking and auto-lock.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the front cross-sectional structure of the present invention;

fig. 2 is an enlarged view of a region a in fig. 1.

In the figure: 1. a bolt; 2. an external thread; 3. a base; 4. a threaded hole; 5. a first internal thread; 6. a second internal thread.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides an embodiment: an internal thread with a self-locking function comprises a bolt 1, an external thread 2, a base 3, a threaded hole 4, a first internal thread 5 and a second internal thread 6, wherein the threaded hole 4 is formed in one side of the base 3, the bolt 1 is installed inside the threaded hole 4, the external thread 2 is arranged on the bolt 1, and the external thread 2 is in threaded connection with the inside of the threaded hole 4; a first internal thread 5 is formed inside the threaded hole 4, and the external thread 2 is meshed and connected inside the first internal thread 5; a second internal thread 6 is arranged on one side of the first internal thread 5, and the external thread 2 is meshed and connected with the inside of the second internal thread 6; the thread size of the external thread 2 is M12, and the thread pitch is standard 1.5mm; the thread size of the first internal thread 5 is M12, and the thread pitch is standard 1.5mm; the second internal thread 6 has a thread size M12 and a pitch of 1.41mm, which is standard.

The working principle is as follows: when the bolt 1 is screwed into the threaded hole 4 on the base 3, the right side of the thread form of the external thread 2 is tightly contacted with the first internal thread 5 to achieve the effect of fastening connection, the effective moment part on the right side at this time, namely the second internal thread 6, the thread pitch of the processed part is shorter than that of the first internal thread 5 by a specific size, so that the left side of the thread form of the external thread 2 is in interference contact with the second internal thread 6 to generate a larger friction moment, thereby realizing the anti-loose self-locking of the thread, different effective moments can be obtained by adjusting the extra size in the processing, the extra size value is determined by measuring the actual effective moment after processing and is usually set according to the national standard GB/T3098.9-2020 or the equivalent international standard ISO-2320-2008, if a client needs a larger effective moment, the increase of the specific size can be realized, the machining process generally adopts a numerical control machining center, utilizes a single-blade thread milling cutter, and uses an interpolation method to machine different thread pitches in a screw hole, because the precision of the numerical control machine is higher and the change of the thread pitches is easy to adjust, the application of different effective moments required for different screw holes can be met, the testing is carried out according to the standard GB/T10431-2008, the testing name is a transverse vibration testing method of a fastener, the thread of a corresponding self-locking nut is M12 multiplied by 1.5, the adopted locking axial force is 45kN, the transverse vibration force is 4.1kN, the vibration frequency is 12.5Hz, the single vibration frequency is 3000 vibration cycles, according to the testing data of 10 nuts, the connecting axial force is kept at least 95 percent of excellent performance in 3000 vibration cycles, and the axial force and the vibration cycle curve are basically kept in a straight line state, the internal thread is proved to be stable in state and high in reliability in experiments.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an internal thread with self-locking function, includes bolt (1), external screw thread (2), base (3), screw hole (4), first internal thread (5) and second internal thread (6), its characterized in that: threaded hole (4) are seted up to one side of base (3), and the internally mounted of threaded hole (4) has bolt (1), is provided with external screw thread (2) on bolt (1), and external screw thread (2) threaded connection is in the inside of threaded hole (4).

2. The internal thread with the self-locking function as claimed in claim 1, wherein: first internal thread (5) are seted up to the inside of screw hole (4), and external screw thread (2) meshing connects in the inside of first internal thread (5).

3. The internal thread with the self-locking function as claimed in claim 2, wherein: one side of the first internal thread (5) is provided with a second internal thread (6), and the external thread (2) is meshed and connected with the inside of the second internal thread (6).

4. The internal thread with the self-locking function as claimed in claim 2, wherein: the thread size of the external thread (2) is M12, and the thread pitch is 1.5mm.

5. The internal thread with the self-locking function as claimed in claim 2, wherein: the thread size of the first internal thread (5) is M12, and the thread pitch is 1.5mm.

6. The internal thread with the self-locking function as claimed in claim 3, wherein: the thread size of the second internal thread (6) is M12, and the thread pitch is 1.41mm.