CN202673952U - Thread connecting piece - Google Patents

Abstract

The utility model relates to a threaded connector in a dynamic coupling structure. A threaded connector, comprising a head and a tightening tail, the head is provided with a side groove fitted with a screwdriver, the tightening tail is a screw sleeve with a helical structure, the head and the screw sleeve The starting circle is welded into a whole. Because the threaded connection is made of spring steel material, the thread is made of spring, and the interference fit is adopted, it has a large amount of elastic deformation and is easy to implement pre-tightening; under the action of alternating load, the elastic force will offset the alternating fretting The role of load, play a role in loosening.

Description

a threaded connection

technical field

The utility model relates to a threaded connector in a dynamic coupling structure. the

Background technique

Purpose: Due to the relative movement of the dynamic connection structure, the screws are often loose and cause structural failure. In this case, the threaded connection parts need to have a certain anti-loosening ability and can be disassembled many times without affecting the working performance of the precision (these two requirements are often difficult. At the same time), it is required to have a simple structure and good processing technology. the

The closest prior art with the utility model:

The existing set screw production technology is first stamping, and then processing thread. The economy is good in mass production, but the problem of anti-loosening is not solved. Friction lock, mechanical lock, riveting punch, and buckle lock are three traditional thread lock methods. Mainly rely on the force of a third party to enter the anti-loosening force, which actually refers to the friction force. The effect of the anti-loosening effect depends on the size of the third-party force. However, the increased friction is limited. If the increase is small, the anti-loosening effect will be poor; Structural anti-loosening is a relatively new anti-loosening method, such as Down's thread anti-loosening method, which has the characteristics of both left-handed and right-handed threads. Two kinds of nuts with different rotation directions are used in the connection: the nut on the working bearing surface is called the fastening nut; the nut on the non-supporting surface is called the lock nut. When in use, the fastening nut is pre-tightened first, and then the lock nut is pre-tightened. In the case of vibration and impact, the fastening nut will tend to loosen. Since the loosening and retreating direction of the fastening nut is the tightening direction of the locking nut, the tightening of the locking nut just prevents the loosening and retreating of the fastening nut, resulting in tightness. The fixing nut cannot be loosened. The structural anti-loosening structure is complex and economical, and cannot be applied to small parts such as set screws.

Deficiencies of the prior art: a. Unable to preload; b. For anti-loosening difference of alternating fretting load

Utility model content

The utility model is mainly applied to small set screws in the state of fretting wear, and the main problem to be solved is that the threaded connection is easy to pre-tighten, can be disassembled many times without affecting the accuracy, and has good anti-loosening performance. the

A threaded connector, comprising a head and a tightening tail, the head is provided with a side groove fitted with a screwdriver, the tightening tail is a spiral structure, and the head and the initial circle of the spiral structure Welded into a whole. the

The screw-on tail is formed by winding a spring steel wire. the

The cross section of the spring steel wire is triangular. the

Because the threaded connection is made of spring steel material, the thread is made of spring, and the interference fit is adopted, it has a large amount of elastic deformation and is easy to implement pre-tightening; under the action of alternating load, the elastic force will offset the alternating fretting The role of load, play a role in loosening. Use a flathead screwdriver to insert into the grooves on both sides and rotate to realize the installation of screws, bolts or studs. the

Description of drawings

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

Wherein, 1, the head; 2, tighten the tail; 3, the side groove.

Detailed ways

As shown in Figure 1, a threaded connector includes a head 1 and a tightening tail 2, the head 1 is provided with a side groove 3 fitted with a screwdriver, and the tightening tail 2 is a spiral structure, so The head 1 is welded integrally with the initial ring of the helix structure. the

Use stamping dies to manufacture steel wires with triangular cross-sections, and use computerized spring machines (coil spring machines) to process springs to properly adjust the process of producing triangular threads. The thread size is about 2% larger than standard threads; The circle is welded into a whole. the

Before heating, tie the starting point of the two ends with iron wire; use a hollow steel pipe or a profiling mandrel with a suitable size, and put the spring on it to ensure straightness. the

This part has the advantages of both spring and thread, and can provide a certain pre-tightening force for the set screw when screwing the thread, and because the rigidity of the part is small compared with the general turning thread, it can be used under a certain pre-tightening force. It can produce a large amount of elastic deformation. the

Materials with triangular cross-sections can be prepared by stamping or hydraulic devices, and materials with triangular cross-sections have better rotational stability. the

Adopting appropriate technological measures to eliminate the impact of spot welding on thread deformation is the key to the success of the utility model. The part in the picture is a straight screw. In fact, hexagonal head and hexagonal threaded joints such as bolts and studs can also adopt this production process. the

Claims (3)

1. threaded connector, comprise head (1) and screw afterbody (2), it is characterized in that: described head (1) is provided with the side channel chimeric with bottle opener (3), and the described afterbody (2) that screws is leptospira structure, and described head (1) is connected into integral body with the initial lap welding of described leptospira structure.

2. a kind of threaded connector according to claim 1, it is characterized in that: the described afterbody (2) that screws is around forming by the spring steel steel wire coil.

3. a kind of threaded connector according to claim 2, it is characterized in that: the cross section of described spring steel steel wire is triangle.

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