WO2018097592A1

WO2018097592A1 - Loosening prevention nut

Info

Publication number: WO2018097592A1
Application number: PCT/KR2017/013335
Authority: WO
Inventors: 임영우
Original assignee: 주식회사 임진에스티
Priority date: 2016-11-25
Filing date: 2017-11-22
Publication date: 2018-05-31
Also published as: KR20180059310A

Abstract

The present invention relates to a loosening prevention nut and, more particularly, to a loosening prevention nut enabling tight fastening of a screw shaft by means of a strain rate of a spring itself which is mounted inside a nut and tightly covers the outer circumferential surface of a screw thread of a bolt being screw-coupled, and thus preventing arbitrary loosening even if vibration or impact is applied from the outside. The nut comprises: an insertion portion inserted inwardly with the upper side as a starting point; a nut body having, on the center of the lower end of the insertion portion, a screw hole having a smaller inside diameter; and a loosening prevention portion which is positioned inside the insertion portion of the nut body, tightly holds the outer circumferential surface of the screw shaft of the bolt by means of the tensile force of itself and thus prevents loosening. By means of having an inclined angle, in which both end parts are inclined upward with a center line as a starting point and the outside diameter is equal to the inside diameter of the insertion portion of the nut body, the nut comes in tight contact with a screw surface of the bolt due to the tensile force of the inclined angle and can prevent loosening.

Description

Loosen Nut

The present invention relates to an anti-loosening nut, and in particular, to allow the spiral shaft to be intimately contacted by the strain of the spring itself, which is attached to the inside of the nut and is tightly wrapped around the threaded outer circumference of the bolt where the screw is formed. The present invention relates to an anti-loosening nut which does not arbitrarily loosen even when a shock is applied.

In general, bolts and nuts are used to join two objects, which are usually separated by two or more, in various fields, such as electric vehicle and automobile accessory assembly, electronic component assembly, furniture assembly, and structure assembly in construction sites. It is widely used.

As described above, the simple fastening structure of the bolt and nut has a disadvantage in that the fastening force is weakened by external shock or vibration.

In other words, the screw's screw shaft is in the state of being fastened to the screw thread formed in the nut. When vibration or shock is applied from the outside during use, the nut screwed on the screw shaft is loosened arbitrarily. There is a disadvantage that two structures are fastened and fixed by space, and in severe cases, the bolts and nuts are completely loosened and the structure is broken, causing a breakdown and collapse.

As mentioned above, in order to prevent the loosening of the nut, which is screwed to the screw's spiral shaft, even if external shock or vibration occurs, it can be used in a state where there is no risk of safety accident. Development of anti-loosening nut that has the current situation is still used.

As described above, the Japanese Laid-Open Patent Publication has been introduced among various loosening nuts that can prevent the bolts and nuts from being loosened by vibrations and shocks from the outside while the bolts and nuts are screwed together.

The nut is provided with a spiral hole perpendicular to the center of the nut body, the upper portion of the nut body at least three equal intervals by pressing inwardly has a spiral surface, the bolt in the spiral hole of the nut When the helix shaft of the screw is screwed in, the pressed helix surface pressed inwards can push the helix shaft of the bolt so that the bolt and nut are not loosened arbitrarily.

However, in the conventional nut as described above, while the entire spiral hole maintains the same angle as the helix axis of the bolt, it presses a portion of the upper end inward to form a pressing spiral surface, which is pressed when the nut and the bolt are screwed together. When the spiral part of the other parts except the spiral surface is screwed, the screw is made by simple surface contact by the helix of the same angle, but the pressed screw part is tightened or tightened by close contact force by the pressed pressure. In the case that the force from the outside, that is, the vibration (shock) and damage (scratch) was a problem that occurs.

In order to solve the above problems, the present invention is formed on the nut of the spiral hole of the upper part of the spiral hole is made of a screw and the spiral is formed to form a spiral hole of a somewhat smaller angle than the other spiral holes, Pressing a part of the spiral ball with a smaller angle inward, and only the mountain part of the spiral hole is in contact with the nut while maintaining the elastic force on the valley part that forms the thread of the bolt while the spiral parts are separated from each other. The purpose is to be able to be used in a state in which there is no damage even when the vibration and shock from the outside in the fastening state and the fastened state.

The present invention for realizing this object is a nut main body having a concave indentation to the inner side starting from the upper surface, the spiral hole having a smaller inner diameter at the center of the lower end of the concave;

In the nut is located in the concave part of the nut body and tightly holding the outer peripheral edge of the spiral shaft of the bolt by its tensioning force to prevent loosening in the nut,

In the state in which the nut main body has the same outer diameter as the inner diameter of the concave inlet part, both ends of the nut body have an inclination angle inclined upward toward the upper portion, and is tightly attached to the spiral surface of the bolt by the tension force of the inclination angle. To prevent it.

In addition, the anti-loosening portion is provided with an elastic piece wound to have its own tension force in the state of having a spiral surface of the same angle so as to be in contact with the spiral surface provided on the spiral shaft on the inner surface having a flaky shape, It is characterized in that the elastic piece has an inclination angle such that both end portions are inclined upwardly from the center line.

In addition, the spiral axis is not rotated arbitrarily when the spiral shaft is screwed in the state that the release preventing portion is inserted into the storage chamber, and the outer periphery of the elastic piece which is perpendicular to the upper surface center line of the release preventing portion so that the screw can be screwed, and It is characterized in that the inner side of the corresponding storage chamber is provided with a guide portion that is fitted with each other, male and female.

In addition, the guide portion has a guide groove which is recessed inwardly on one side of the outer peripheral surface of the elastic piece, characterized in that the guide shaft to be fitted in the guide groove on one side of the inner peripheral surface of the storage compartment of the nut main body is provided.

In addition, the guide portion is characterized in that formed on one side of the outer peripheral surface of the elastic piece and the corresponding storage chamber.

In addition, the guide portion is characterized in that formed on both sides of the outer peripheral surface of the elastic piece and the storage chamber corresponding thereto.

The present invention is formed in an elastic piece equipped with a screw thread on the inner periphery of the anti-loosening portion located in the storage chamber provided in the nut body to surround the outer periphery of the spiral shaft penetrating the spiral hole, the bending of the elastic piece in the middle of the upper surface Since the spiral shaft is fastened to both sides from the point as a starting point, when the spiral shaft is spirally fastened to the elastic piece, the elastic piece having the tilt angle is spirally fastened to the spiral shaft and forced by its elastic force. As the spiral is unfolded in a horizontal state, one side of the thread provided on the elastic piece is closely pressed against one side of the spiral shaft by its elastic force to return to its original state. Even if an impact occurs, there is an effect that it is not released arbitrarily.

1 is a schematic illustration showing a state in which the present invention is applied.

Figure 2 is an exploded perspective view for showing the configuration of the present invention.

3 is a cross-sectional view showing the configuration of the nut of the present invention,

Figure 3a is a state before the loosening portion is coupled to the nut body.

Figure 3b is a state in which the loosening prevention part is fitted into the nut body.

4 is a view showing a molding state of the anti-loosening portion of the present invention,

Figure 4a is a plan view of the loosening prevention portion.

Fig. 4B is a sectional view of the molded state of the loosening prevention.

5 is a cross-sectional view showing a fastening state of the nut of the present invention,

Figure 5a is a state in which the helix of the bolt is screwed to the screw hole of the nut body.

Figure 5b is a state in which the helix of the bolt is screwed in the loosening prevention portion.

Figure 6 is an enlarged view showing a fastening state of the present invention,

Fig. 6A is a state in which the distal end of the spiral shaft is screwed into the lowermost end of the elastic piece.

6B is a state in which the spiral shaft is spirally fastened to the entire elastic piece.

The present invention includes a nut main body having a concave indentation recessed inwardly from an upper surface thereof, and a spiral hole having a smaller inner diameter at the center of the lower end of the concave recess;

In the state in which the nut main body has the same outer diameter as the inner diameter of the concave inlet part, both ends of the nut body have an inclination angle inclined upward toward the upper portion, and is tightly attached to the spiral surface of the bolt by the tension force of the inclination angle. It is configured to be prevented.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a state in which a bolt is spirally fastened using a nut to which the present invention is applied, and the nut 100 is a spiral shaft of a bolt 10 passing through a through hole 1a formed in the structure 1. 11) As the spiral is fastened in the penetrating state, the structure is firmly connected and maintained.

Figure 2 is an exploded perspective view showing a nut to which the present invention is applied, Figure 3 is a cross-sectional view for showing the configuration of the present invention.

The nut 100 of the present invention comprises a nut body 200 and an anti-loosening part 300 which is placed inside the nut body to closely hold the outer circumference of the spiral shaft of the bolt by its tension force.

The nut main body 200 has an outer circumference at the intermediate point as a starting point, and a lower end portion has a hexagonal shape, and the upper portion of the hexagonal shape has a circular shape gradually inclined inward.

In addition, the nut body 200 is provided with a spiral hole 210 for penetrating the up and down in the center of the nut body 200 so that the spiral shaft 11 of the bolt 10 can be screwed, the intermediate point of the nut body Starting from this, the upper part is provided with a storage chamber 220 having a larger inner diameter than the spiral hole so that the release preventing part 300 can be placed in the storage chamber 220.

At this time, the inner diameter of the storage chamber 220 is equal to or smaller than the outer diameter of the elastic portion, and the storage chamber 220 is in a straight state as shown in Figure 3a to prevent the loosening portion 300 In the state in which the release preventing portion is accommodated in the storage room, as shown in FIG. 3B, the upper end portion is bent inward to press the upper surface of the release preventing portion 300. In this case, the loosening prevention part 300 accommodated in the storage chamber 220 may not be arbitrarily removed.

In addition, the anti-loosening part 300 is provided with an elastic piece 310 having a structure having a one-piece structure, and the inner surface of the wound bullet piece is a thread 320 of the same angle as the spiral shaft 11 of the bolt. To form a spiral shaft and a spiral fastening.

At this time, the elastic piece 310 is wound in a horizontal state as shown in Figure 4b, the elastic piece 310 to be wound is wound up in a state that the upper and lower surfaces are in contact with each other, When the elastic piece 310 is wound around the center line A as a starting point, both sides are inclined upwardly from the bending point 340 to form an inclined angle θ.

As described above, the elastic piece 310 having the inclination angle θ at which both side ends are inclined upwardly from the bending point 340 is accommodated in the concave indentation portion 220, and the upper end of the nut body 200 is inward. By the bent end portion 240 to be bent, the elastic portion 310 is in a state of being stored without being arbitrarily removed from the storage chamber 220.

In this case, in order to prevent the loosening prevention part 300 located in the concave inlet 220 from being arbitrarily rotated, the nut main body 200 and the elastic piece 310 are provided with guide parts which are fitted with each other by female and male parts. The part is provided with a guide shaft 230 protruding vertically on one side wall of the storage chamber 220, and guide grooves 330 to be fitted to one side of the outer circumferential surface of the elastic piece 310. By providing, the loosening prevention part 300 accommodated in the concave inlet portion is to be prevented from rotating arbitrarily.

The guide portion may be formed only in one direction of the elastic piece 310 and the storage chamber 220, and may be formed at both corresponding positions as necessary. When the guide portion is formed at both corresponding positions, Compared with the guide part provided only on one side, when the spiral shaft is spirally fastened to the inner side of the elastic piece, the eccentric force does not occur to one side so that the spiral fastening can be efficiently performed.

The anti-loosening nut 100 of the present invention having the above configuration has the anti-loosening part stored in the storage chamber 220 of the nut main body 200 in a state in which the spiral shaft 11 of the bolt 10 is not screwed up. That is, the elastic piece 310 maintains the inclination angle θ that is inclined upwardly in both directions from the bending point 340, which is the intermediate point, as it is.

In this state, the screw shaft 11 of the bolt 10 is spirally fastened to the nut body 200. As shown in FIG. 5A, the screw shaft 11 is formed at the center of the nut body 200 from the lower end of the nut body 200. As the spiral fastening is made to the spiral hole 210, when the spiral shaft 11 is spiral fastened to the spiral hole 210, the loosening prevention part 300 does not give any change to the elastic piece 310. .

That is, the elastic piece 310 is in a state of maintaining the inclination angle θ that is inclined upward to both sides from the bending point 340 of the intermediate point as it is.

In this state, when the spiral shaft 11, in which the spiral is fastened to the spiral hole 210, penetrates the spiral hole, the spiral shaft 11 is loosened in the spiral hole 210 and the storage chamber 220 from this time. At the same time it is a state that the spiral is fastened to the prevention unit (300).

More specifically, as shown in FIG. 6A, the tip portion of the spiral shaft 11 is in contact with the thread 320 located at the lowermost end of the elastic piece 310, in which case the elastic piece 310 is disposed. Since the inclined angle θ is inclined upward toward both sides from the bending point 340 of the intermediate point, the spiral shaft 11 and the thread 320 formed at the same angle are not closely engaged with each other. Instead, the gap due to the inclination angle θ is opened.

In this state, if the spiral shaft 11 is continuously rotated to perform the spiral fastening, as shown in FIG. 6B, the elastic piece 310 having its own elastic force by engaging the spiral shaft 11 and the screw thread 320 is shown. ) Is pushed in a horizontal state is a spiral fastening is made in a state in which the spiral shaft 11 and the screw thread 320 is in close contact with each other.

At this time, the elastic piece 310 that maintains the inclination angle θ that is inclined upward toward the outside from the bending point 340 of the intermediate point is the elastic piece by engaging the spiral shaft 11 and the thread 320. The 310 is forcibly unfolded, that is, to maintain a horizontal state, the elastic piece 310 that maintains the horizontal state is applied to the elastic force of the both ends are directed upward by its elastic force As such, the bottom surface of the thread 320 is fastened in a state in which the top surface of the spiral shaft 11 is pressed closely.

The anti-loosening part 300 as described above is caught in a state in which the guide shaft 230 provided in the storage chamber 22 is fitted in the guide groove 330 provided perpendicular to one side of the elastic piece 310. When the spiral shaft 11 is spirally fastened to the elastic piece 310, the elastic piece is not rotated arbitrarily in the storage compartment, and the spiral fastening is performed, as well as the inclination angle θ of the elastic groove is deformed. That is, the fitting is made in a state formed in a vertical state, so that the spiral is made in a state that does not give any obstacle to the inclination angle (θ) deformation of the elastic piece.

Conventional nuts form a pressing spiral surface by pressing a portion of the upper part inwardly while the entire spiral hole maintains the same angle as the spiral axis of the bolt. When the nut and the bolt are screwed together, the nut is different from the pressing spiral surface. When the spiral part of the part is tightened by a helix at the same angle, the screw is tightened by simple surface contact, but the pressed spiral part is tightened by close contact force by the pressed pressure or from the outside when tightened That is, in the present invention, there is a problem that damage (scratch) occurs when vibration and shock are applied, so that the conventional problem can be used in a state that solves the conventional problems.

Claims

A nut main body having a concave indentation recessed inwardly from an upper surface thereof and a spiral hole having a smaller inner diameter at the center of the lower end of the concave recess;

In the nut is located in the concave part of the nut body and tightly holding the outer peripheral edge of the spiral shaft of the bolt by its tensioning force to prevent loosening in the nut,

In the state in which the nut main body has the same outer diameter as the inner diameter of the concave inlet part, both ends of the nut body have an inclination angle inclined upward toward the upper portion, and is tightly attached to the spiral surface of the bolt by the tension force of the inclination angle. An anti-loosening nut with an anti-loosening part that prevents it from falling out.
The method of claim 1,

The anti-loosening part has an elastic piece wound to have its own tension force in the state of having a spiral surface of the same angle so as to have a flat shape and to be in contact with the spiral surface provided on the spiral shaft on the inner surface thereof. An anti-loosening nut, characterized in that it has an inclination angle such that both end portions are inclined upwardly from the center line.
The method of claim 1,

The outer periphery of the elastic piece that is perpendicular to the upper surface of the center line of the loosening prevention portion so that the spiral shaft does not rotate arbitrarily when the spiral shaft is screwed in the state that the anti-loosening portion is inserted into the storage chamber, An anti-loosening nut, characterized in that the inner side of the storage compartment is provided with a guide portion that is fitted with each other, male and female.
The method of claim 3, wherein

The guide part has a guide groove which is recessed inward on one side of the outer peripheral surface of the elastic piece, and a guide shaft for fitting into the guide groove on one side of the inner peripheral surface of the storage compartment of the nut main body is provided.
The method of claim 3, wherein

The guide part is an anti-loosening nut, characterized in that formed on one side of the outer peripheral surface of the elastic piece and the corresponding storage chamber.
The method of claim 3, wherein

The guide part is an anti-loosening nut, characterized in that formed on both sides of the outer circumferential surface of the elastic piece and the storage chamber corresponding thereto.