CN202790011U - Anti-loosening flange nut - Google Patents

Abstract

The utility model provides an anti-loosening flange nut, which belongs to the technical field of machinery. It solves the problems of uneven thread load distribution and poor anti-loosening effect of each part of the existing flange nut. The anti-loosening flange nut includes a nut body, the nut body includes a ring-shaped flange part and a connection part connected with the flange part, and the end of the connection part close to the flange part is provided with a Ring groove. The anti-loosening flange nut screw connection has high fatigue strength, uniform thread load distribution of each part, good nut anti-loosening effect, simple structure, convenient manufacture and long service life.

Description

Lock flange nut

technical field

The utility model belongs to the technical field of machinery, and relates to a flange nut, in particular to an anti-loosening flange nut. the

Background technique

A nut is a mechanical part that has an internal thread and is used in conjunction with a screw to transmit motion or power. At present, in the assembly of automobile parts, bolts and nuts are usually used to fix the two parts together. During the long-term use of components, anti-loosening has always been an important research topic for threaded connections. Usually, the threaded connection will loosen under the following two conditions: First, under the action of shock, vibration or variable load, the friction force between the thread pairs may decrease or disappear instantly. Second, in the case of high temperature or large temperature changes, due to the creep and stress relaxation of the material of the threaded connection and the connected parts, the pretightening force and friction in the connection can also be gradually reduced, resulting in connection failure. . Once the thread is loose, it will affect the normal operation of the machine and even cause serious accidents. Therefore, it is necessary to carry out anti-loosening treatment on the threaded connection. the

In the existing industrial field, there are many devices that use flange nuts integrated with gaskets and nuts for fastening and anti-loosening. When the existing flange nut is connected and loaded, the thread on the bolt has a tendency to be stretched, while the thread on the nut has a tendency to be compressed, and the deformation tendency of the two is opposite, so that the load on the thread on the nut is mainly concentrated At the first circle of thread connected with the bolt, the subsequent circles decrease in turn, the load on each part of the thread is unevenly distributed, the fatigue strength of the threaded connection is poor, and it is easy to cause deformation and failure of the thread, and the service life is short. It will cause the nuts and bolts to loosen or fall off, affecting the normal operation of the machine and even causing serious accidents, and the anti-loosening effect is poor. the

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and to propose an anti-loosening flange nut with uniform thread load distribution and good anti-loosening effect. the

The purpose of this utility model can be achieved through the following technical proposals: a kind of anti-loosening flange nut, including a nut body, the nut body includes a ring-shaped flange part and a connecting part connected with the flange part An annular groove is recessed on the end surface of the connecting part close to the end of the flange part. the

The connection part of the anti-loosening flange nut is concavely provided with an annular groove, which can make the connection part near the flange part have a suspension effect when it is connected with the bolt, so that when the flange nut connection is loaded, the bolt will The thread has a tendency to be stretched, and the part of the thread on the nut opposite to the annular groove also has a tendency to be stretched. The deformation tendency of the two is the same, which effectively improves the fatigue of the threaded connection on the nut opposite to the annular groove. Strength, not easy to deform, increases the life of the thread, so that the threads on each part of the nut are evenly loaded. the

In the aforementioned anti-loosening flange nut, the width of the annular groove gradually decreases from the opening to the inside. The width of the annular groove gradually decreases from the opening to the inside, so that the load on each part of the thread on the nut is more uniform, the fatigue strength of the thread is improved, and the life of the thread is increased. the

In the above-mentioned anti-loosening flange nut, the depth of the annular groove is 4-10 mm. If the depth of the annular groove is too shallow, the effect of uniform load is poor; if the depth of the annular groove is too deep, the overall strength of the nut is poor. The depth of the annular groove is within the scope of the present application, which can make the load on the thread of each part of the nut more uniform, and also ensure the required strength of the nut. the

In the above-mentioned anti-loosening flange nut, the end surface of the flange portion in contact with the connected piece is provided with continuous anti-slip teeth extending in a direction opposite to the screwing direction of the nut body. Through the function of the anti-slip teeth, the roughness of the contact surface between the flange part and the connected part is increased, the friction force of the contact surface is increased, and the flange nut can be effectively prevented from loosening and sliding against the tightening direction. the

In the aforementioned anti-loosening flange nut, the anti-slip teeth are one-way helical teeth. The anti-skid teeth are one-way helical teeth with good pre-tightening force, and the effect of anti-loosening and sliding is better and more reliable. the

In the above-mentioned anti-loosening flange nut, the nut body is made of high-strength steel. The nut body is made of high-strength steel, which has good overall performance. The strength of the threaded connection is high, which improves the reliability of the threaded connection. It is not easy to loosen during use and has a long service life. the

Compared with the prior art, the anti-loosening flange nut has the following advantages:

1. There is an annular groove on the end of the connecting part close to the flange part, which makes it have a suspension effect, improves the fatigue strength of the threaded connection, is not easy to deform, and increases the life of the thread. The load distribution tends to be even. the

2. Anti-slip teeth are provided on the end surface of the flange part, which increases the friction force of the contact surface and can effectively prevent the flange nut from loosening and sliding against the tightening direction. the

3. It is made of high-strength steel, which improves the reliability of the threaded connection and is not easy to loosen. It has a simple structure, is convenient to manufacture, and has a long service life. the

Description of drawings

Fig. 1 is a structural schematic diagram of the anti-loosening flange nut. the

Fig. 2 is a sectional view of the anti-loosening flange nut. the

In the figure, 1, nut body; 11, flange part, 111, anti-slip teeth; 12, connecting part; 121, annular groove. the

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments. the

As shown in Figure 1-2, the anti-loosening flange nut includes a nut body 1, and the nut body 1 is made of high-strength steel. The nut body 1 includes an annular flange portion 11 and a connecting portion 12 connected to the flange portion 11 . The end face of the flange portion 11 in contact with the connected piece is provided with anti-skid teeth 111 that are continuous and extend in the direction opposite to the screwing direction of the nut body 1, and the anti-skid teeth 111 are one-way helical teeth. An annular groove 121 is recessed on the end surface of the connecting portion 12 close to the end of the flange portion 11. The depth of the annular groove 121 is 4-10mm, and the width of the annular groove 121 gradually decreases from the opening to the inside. the

The end surface of the anti-loosening flange nut connection part 12 close to the flange part 11 is concavely provided with an annular groove 121, so that it has the effect of suspension. When the flange nut connection is loaded, the thread on the bolt has a tension trend, and the part of the thread on the nut opposite to the annular groove 121 also has a tendency to be stretched. Deformation increases the life of the thread and makes the threads of each part of the nut evenly loaded. At the same time, anti-slip teeth 111 are provided on the end surface of the flange part 11, which increases the friction force of the contact surface and can effectively prevent the flange nut from loosening and sliding against the tightening direction. The anti-loosening flange nut is made of high-strength steel, which improves the reliability of the threaded connection and is not easy to loosen. The structure is simple, the manufacture is convenient, and the service life is long. the

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range. the

Although terms such as nut body 1 , flange portion 11 , anti-slip teeth 111 , connecting portion 12 , and annular groove 121 are frequently used herein, the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model. the

Claims (6)

1. loose-proof flange nut, comprise nut body (1), it is characterized in that, described nut body (1) comprises flange part (11) in the form of a ring and the joint (12) that is connected as a single entity with described flange part, and described joint (12) is concaved with annular groove (121) near on the end face of flange part (11) one ends.

2. loose-proof flange nut according to claim 1 is characterized in that, the width of described annular groove (121) successively decreases inward successively from opening.

3. loose-proof flange nut according to claim 1 and 2 is characterized in that, the degree of depth of described annular groove (121) is 4～10mm.

4. loose-proof flange nut according to claim 3 is characterized in that, described flange part (11) is provided with continuously and the slideproof tooth that turns opposite direction (111) of bearing of trend and described nut body (1) with the contacted end face of connected piece.

5. loose-proof flange nut according to claim 4 is characterized in that, described slideproof tooth (111) is unidirectional helical teeth.

6. loose-proof flange nut according to claim 5 is characterized in that, described nut body (1) adopts high tensile steel to make.

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