KR20170031919A - Anti-loose bolt and nut assembly - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an unlocking bolt nut coupling body, and more particularly, to a bolt and nut coupling device for preventing loosening between a bolt member and a nut member.
According to an embodiment of the present invention, there is provided an unlocking bolt nut coupling body comprising: a bolt member having a plurality of vertical cutouts radially formed in a predetermined length passing through a center of a screw; a bolt member penetrating from one side of the body in the horizontal direction, And a loosening prevention pin which is inserted into the cutout portion and the through hole in a straight line after the screw connection of the bolt member and the nut member to prevent the nut member from being loosened.
Further, the through-hole may be formed so as to be shifted to either the upper side or the lower side from the horizontal center line of the nut member.
In addition, an engaging groove can be formed by bending one side of the anti-loose pin on the outer circumferential surface of the through hole of the nut member.

Description

ANTI-LOOSE BOLT AND NUT ASSEMBLY "

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an unlocking bolt nut coupling body, and more particularly, to a bolt and nut coupling device for preventing loosening between a bolt member and a nut member.

Well known bolts and nuts among the mechanical elements used to tighten two or more mechanical parts are effective for large loads because they use the strong fastening force of screws. However, since bolts and nuts can not be easily retained by loosening the screw when vibration is applied, a means is needed to prevent the screw loosening. Loosening the bolts and nuts by loosening the screws can cause machine failure or noise. Especially in the case of vehicles, for example, bolts connecting the line changing parts to the railway cars and car derailing accidents caused by the loosening of the nuts There is a risk of large-scale accident, and a more reliable means of preventing screw loosening is required.

The bolt and nut are provided with a spring washer, a tongued washer, a locknut or a double nut, a fixing screw a set screw or a set bolt, and a method of fastening the screw surface with a nut fitted with a cushioning material such as plastic or rubber or a cylindrical spring, etc. However, these methods have a problem in that the fastening force of the bolt and nut is slightly strengthened And it does not fundamentally solve the problem of screw loosening due to continuous shock or vibration.

On the other hand, the method of inserting the split pin into the bolt having the hole can reliably prevent the screw from loosening because the nut restrains the bolt from rotating with respect to the bolt. However, in order to insert the split pin, Since the nut must be tightened to the position where the holes are matched with each other, it is necessary to use bolts having different hole positions according to the thickness of the parts, and it is not possible to apply them all at once due to the difference of the minute holes in the parts to be fastened. It has been necessary to improve the disadvantages such as finding a position and working.

The patent documents described later are cited as prior art related to the pin fixing method which is different from the above-mentioned hole bolt split pin method.

A proposal of Patent Document 1 (Korean Utility Model Application No. 20-1999-0040447) discloses that a trough is formed on a shaft portion of a bolt along one side surface thereof, and a plurality of protruding keys And a separate locking pin is used. The locking pins are received in the above-mentioned troughs of the bolt to provide a resilient force, and both ends of the ring portion are of a proper radiation angle and straightened. The nut is constrained by pushing the ring portion of the locking pin into the groove of the bolt projecting out of the nut in the state where the bolt and the nut are fastened, and fitting the both ends into the locking groove of the nut. According to this proposal, the nut can be tightly fastened to the locking pins, so that it can be tightly fastened. However, since both ends of the locking pin can be expanded and contracted relatively large, And it is troublesome to work.

In the proposal of Patent Document 2 (Korean Patent Laid-Open Publication No. 10-1999-0018771), a hole is formed in the center portion of the shaft portion of the bolt from the head portion to the vicinity of the thread portion, and a "+" And a separate spring pin is used. The spring pin is the same as the torsional coil spring. When both ends of the spring pin are pushed into the hole of the bolt and pushing to the end, the both ends of the spring pin come out of the cutout groove, . This prevents nut loosening and does not solve the screw loosening problem because it does not lock the nut in the direction of rotation.

Particularly, in the related art, a technique of preventing loosening of a bolt having a hole with a split pin prevents the screw from loosening because it restrains the nut from rotating with respect to the bolt. However, The holes penetrating laterally must be aligned with each other, and the split pins must be inserted into the corresponding holes.

In other words, in the case of tightening or pasting two or more mechanical parts, the fastening height or the thickness between the parts is not constant and varies little by little. Therefore, by inserting the bolts and the nuts into the through- It is difficult to align the positions of the through holes with each other, or the through holes must be drilled in accordance with the matching fastening height or thickness.

KRU 20-1999-0040447 U (1999.11.25) KR 10-1999-0018771 A (Mar. 15, 1999)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a bolt member in which a slot-type cut portion is formed, a through hole penetrating the nut member, and a release preventing pin for fixing the cut portion are inserted, And which can be generally used for a thickness difference between members to be fastened and fastened.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a bolt-nut combination body comprising: a bolt member having a plurality of vertical incisions radially formed in a predetermined length, A nut member having a through hole penetrating to the other side beyond the central axis, and a loosening preventing pin that is inserted into the cutout portion and the through hole in a straight line after screwing the bolt member and the nut member to prevent the nut member from being loosened.

Further, the through-hole may be formed so as to be shifted to either the upper side or the lower side from the horizontal center line of the nut member.

In addition, an engaging groove can be formed by bending one side of the anti-loose pin on the outer circumferential surface of the through hole of the nut member.

According to the present invention, there is an advantage that the universal function of the loosening prevention function is provided within the slot length range irrespective of the thickness and the height of the members to be fastened.

It can be applied to a large number of members having a certain thickness or height within a certain range, which has an advantage of lowering work installation cost.

Increasing the number of incisions through the center has the advantage of enabling more precise locking.

FIG. 1 is a perspective view showing an unlocking bolt nut coupling body according to an embodiment of the present invention. FIG.
FIG. 2 is an exploded view showing an unlocking bolt nut coupling body according to an embodiment of the present invention. FIG.
FIG. 3 is a perspective view showing an unlocking bolt nut coupling body according to another embodiment of the present invention. FIG.
4 is an exemplary perspective view showing a bolt member of an unlocking bolt nut coupling body according to an embodiment of the present invention.
5 is a perspective view illustrating a nut member of a loosening prevention bolt nut assembly according to an embodiment of the present invention.
6 is an exemplary cross-sectional view of an unlocking bolt nut coupling body according to an embodiment of the present invention.

Before describing the present invention in detail, it is to be understood that the present invention is not limited to the specific embodiments but includes all changes, equivalents, and alternatives included in the spirit and technical scope of the present invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software .

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It will be appreciated that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In addition, in the drawings, there is a portion in which the size ratios between the elements are represented to be slightly different or parts having different sizes are expressed in different parts. However, And therefore, a detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

As mentioned in the background, well known bolts and nuts among the mechanical elements used to clamp or attach two or more mechanical parts are effective for large loads because they utilize the strong fastening force of the screws. However, since the bolts and nuts can not be easily retained by loosening the screws when the vibration is applied, a means for preventing the loosening of the screws is desperately needed. The loosening of the bolts and nuts by loosening the screws will cause machine breakdowns and noise as well as serious accidents. Especially in the case of moving or transportation means, for example bolts and nuts for connecting line transformer parts to railway cars There is a risk of a major accident such as a derailment of a vehicle occurring due to deviation, and a reliable screw loosening preventing means for preventing disengagement is required.

Particularly, there is a method of inserting a hole in a bolt and a nut to fix a fixing pin so that the nut does not rotate with respect to the bolt, thereby preventing the screw from being loosened. However, in order to insert the fixing pin, the holes penetrating the bolt and nut in the lateral direction must be aligned with each other so that the fixing pin is inserted. Due to the constraint that the holes of the bolt and the nut must be matched with each other, it is necessary to individually apply bolts fitting to the holes according to the thickness of the parts to be fastened, and it is troublesome to assemble them and can not be universally applied to large fasteners .

Accordingly, the present inventors have endeavored to solve the problems that the prior art can not solve, and have completed the present invention, which is a universal bolt-nut combination body.

FIG. 1 is a perspective view showing a bolt-nut coupling assembly according to an embodiment of the present invention. FIG. 2 is an exploded view illustrating a bolt-nut assembly according to an embodiment of the present invention. Fig. 6 is a perspective view showing an unlocking bolt nut coupling body according to an example.

1, the loosening prevention bolt nut coupling body 10 according to the embodiment of the present invention is composed of a bolt member 100, a nut member 200, and a loosening prevention pin 300, A washer member (not shown) that can be interposed between the nut member 100 and the nut member 200 may be additionally constructed.

For reference, in the present invention, the term 'bolt member' or 'nut member' is used by adding a term 'member' to a bolt or a nut, the conventional bolt or nut is used, This is to emphasize that there is a difference from the conventional function while covering the function.

2, the unlocking bolt nut coupling body 10 according to an embodiment of the present invention includes a vertical slot type incision 110 (FIG. 2) A nut member 200 formed with a through hole 210 radially passing through the center so as to be threadedly engaged with the bolt member 100 and communicating with the cutout 110, And an unlocking pin 300 that is inserted into the cutout 110 and the through hole 210 at the same time to prevent the nut member 200 from being loosened after the screw 100 is fastened to the nut member 200.

3, according to another embodiment of the present invention, an unlocking bolt nut coupling body 10 includes a bolt portion 110 having a vertical slot-type cut-out portion 110 penetrating the center of the screw portion in the longitudinal direction, A nut member 200 having a through hole 210 passing radially through the center so that the bolt member 100 is screwed with the cutout 110 and the bolt member 100, And an unlocking pin 300 that is inserted into the cutout 110 and the through hole 210 at the same time to prevent the nut member 200 from being loosened after the nut member 200 is screwed.

FIG. 4 is a perspective view illustrating a bolt member of a loosening prevention bolt nut coupling body according to an embodiment of the present invention, FIG. 5 is a perspective view showing a nut member of the loosening prevention bolt nut coupling body according to the embodiment of the present invention, Is an exemplary cross-sectional view using a loosening bolt nut coupling body according to an embodiment of the present invention.

As shown in FIG. 2, concrete components of the loosening prevention bolt nut assembly 10 according to an embodiment of the present invention will be described in detail as follows.

The bolt member 100 may be a general vertical slot type used as a hexagonal through bolt known as a fastening screw and cut in a radial direction of the through bolt or a vertical slot type incision 110 Is formed. The cutouts 110 are formed in a "+" shape in which two are crossed in the present invention. (See Figs. 4 (a) and 4 (b)),

However, if the diameter of the male thread is sufficiently large, the incision part 110 can be formed more, and the greater the number of the incision part 110, the more precisely the locking between the bolt member 100 and the nut member 200 can be achieved.

In addition, the bolt member 100 may be a stud bolt or a double nut bolt, which is not related to the shape of a head such as a round head or a dish head, ) Can be applied to all types of fastening bolt elements that can be tightened by a nut.

As shown in FIG. 5, the nut member 200 is a female screw for fastening with a male screw and is used as a hexagon nut formed on the inner circumferential surface of the body with a hollow in the body. The nut member 200 has a through hole 210 in the radial direction of the hex nut, In addition, an insertion groove 220 is formed in a horizontal direction on the nut surface on which the through hole 210 is formed. The concave groove 220 is recessed in the nut surface having the through hole 210 and is formed on the opposite side and is connected to the through hole 210, respectively.

The recess 220 is formed to be larger than the radius of the release prevention pin 300 so that the release prevention pin 300 is seated and immersed so as not to protrude as much as possible on the surface.

In addition, the through hole 210 can be biased to one side from the horizontal center line. That is, as shown in FIG. 5, it may be formed to be shifted toward either the upper side or the lower side from the horizontal center line by a distance d in the height direction or the length direction.

The end of the cutout 110 of the bolt member 100 and the through hole 210 of the nut member 200 meet when the cutout 110 is aligned with the through hole 210 in the vicinity of the slot length end of the cutout 110 This is because the position can be further extended by the length 'd' in FIG. 5.

Further, the nut member 200 can be applied not only to the hexagonal nut shown in the drawing, but also to a square nut or a round nut, and the shape is not limited.

As shown in FIG. 2, the release preventing pin 300 includes a hooking part 310, a fixing part 320 which is horizontal at one end of the hooking part 310, a fixing part 320 which is horizontal at one end of the fixing part 320 And can be divided into bent portions 330 that can be bent.

The hooking part 310 is received in one side groove 220 of the nut member 200 and the fixing part 320 is inserted into one side through hole 210 of the nut member 200, And the bent portion 320 is bent from one end of the fixing portion 320 to the other side recessed portion of the nut member 200 220).

The release preventing pin 300 is supported by the through hole 210 of the nut member 200 while the fixing portion 320 is fixed in the cutout portion 110 of the bolt member 100 so that the rotation of the nut member 200 So that unwinding is prevented.

Particularly, when the bolt is formed as a hole rather than a slot-type incision according to the present invention, the nut and the bolt must be aligned with each other to fit the unlocking pin, Even if there is a slight difference, it is impossible to assemble the anti-loose pin in the hole, which is impossible to bind and is limited, so that the present invention can not be completed.

However, the unlocking bolt nut coupling body 10 according to the embodiment of the present invention has an advantage that the thickness of the members W1 and W2 fastened by the slot length L of the cutout portion can be increased So it becomes very versatile.

That is, the loosening prevention bolt nut coupling body 10 according to the embodiment of the present invention can be widely applied within a range of the slot length (L) without being greatly influenced by the member height or thickness condition fastened through the present invention have.

The hooking portion 310 and the bent portion 330 of the release preventing pin 300 are fitted tightly to the recessed groove 220 formed in the horizontal direction so that the hooking portion 310 and the bent portion 330 of the release preventing pin 300 are depressed even when the bolt member 100 or the nut member 200 is rotated And is guided to be engaged with the groove.

That is, the recess 220 formed in the horizontal direction in the through hole 210 of the nut member 200 causes the bent portion 330 bent in the direction of the straight portion from the fixing portion 320 to be immobilized together with the hook 310 The hooking portion 310 and the bent portion 330 can be guided in the same rotating direction when the bolt member 100 or the nut member 200 is rotated to minimize the engagement and disengagement.

Further, the release preventing pin 300 may be replaced with a known dividing pin. The split pins are split pins that are used to prevent screw loosening and to attach parts to the shaft.

On the other hand, since the dividing pin is a known technique, detailed description thereof is omitted in this specification.

The washer member (not shown) is an annular part that is inserted between the nut member 100 and the bolt member 200 and the portions W1 and W2 to be fixed, and functions to disperse the pressure or prevent loosening of the nut member .

In the present invention, the washer member can be used as a spring washer (lock washer), and serves to prevent the screw from being loosened by a slightly helical washer.

Meanwhile, since the washer is a known technique, a detailed description thereof is omitted in this specification.

Accordingly, the unlocking bolt nut coupling body 10 according to the embodiment of the present invention includes a bolt member 100 having a plurality of radial vertical cut-out portions 110 passing through the center of the threaded portion and having a predetermined length, A nut member 200 having a through hole 210 penetrating through the vertical center axis in the horizontal direction to the other side and a vertical cut-out portion 110 and a through hole (not shown) of the bolt member 100 and the nut member 200, 210 to prevent the nut member 200 from being loosened.

Further, the vertical cut-out portion 110 may be a slot type opened to one side in the longitudinal direction of the bolt member 100.

The through hole 210 may be formed to be shifted to either the upper side or the lower side from the horizontal center line of the nut member 200.

In addition, an engaging groove 220, in which one side of the anti-loose pin 300 is folded and bound to the outer circumferential surface of the through hole 210 of the nut member 200, may be formed in a horizontal direction.

Further, a washer member may be interposed between the bolt member 100 and the nut member 200. [

As described above, the following effects can be expected with the unlocking bolt nut coupling body 10 according to the embodiment of the present invention.

According to the present invention, there is an advantage that the loosening prevention function is provided within the slot length range irrespective of the thickness or the height of the members to be fastened.

That is, there is an advantage that the universal function for the unlocking function is provided within the slot length range irrespective of the thickness and the height of the member to be fastened.

It can be applied to a bolt member and a nut member in a large quantity, thereby reducing the work installation cost.

That is, it can be applied to a large number of members having a thickness or height within a predetermined range, which is advantageous in terms of economy.

Increasing the number of vertical cut-outs 110 penetrating through the center has the advantage of enabling more precise locking.

There is an advantage that the bolt member 100 is formed as a slot type and the cutout portion 110 is formed to widen the fastening range that can be fixed for preventing loosening.

That is, there is an advantage that a restriction that a conventional bolt is formed as a hole and coincides with a hole of a nut can perform a loosening preventing function can be solved.

Up to now, an unlocking bolt nut coupling body according to the present invention has been described with reference to the embodiments. It is to be understood that both the foregoing description and the following description are illustrative of the present invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of explanation, And the like. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention as set forth in the following claims.

100: Bolt member
200: Nut member
300: Release pin

Claims (3)

A bolt member having a plurality of radially arranged vertical incisions of a predetermined length penetrating the center of the screw,
A nut member having a through hole extending from one side of the body to the other side in the horizontal direction through the vertical central axis,
And an unlocking pin which is inserted into the vertical cutout portion and the through hole in a straight line after the bolt member and the nut member are screwed to prevent the nut member from being loosened.
The method according to claim 1,
Wherein the through hole is biased to either the upper side or the lower side from the horizontal center line of the nut member.
The method according to claim 1,
And an engaging groove is formed on an outer circumferential surface of the through hole of the nut member so that one side of the unlocking pin can be folded and bound.

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