KR20150134634A

KR20150134634A - Lock nut

Info

Publication number: KR20150134634A
Application number: KR1020140061645A
Authority: KR
Inventors: 최병해; 강두헌; 정민우
Original assignee: 삼성중공업 주식회사
Priority date: 2014-05-22
Filing date: 2014-05-22
Publication date: 2015-12-02

Abstract

A lock nut is disclosed. The lock nut according to the present invention changes surface pressure in respect of the shaft of an auxiliary nut inserted into the inner diameter of first and second main nuts by controlling the gap between the first and second main nuts formed in a similar shape through bolt coupling. Therefore, the present invention prevents a clearance between adjacent shaft coupling members installed on the shaft.

Description

Lock nut {LOCK NUT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock nut, and more particularly, to a lock nut in which a clearance is not generated between an adjacent shaft engaging member provided on an axle.

Generally, when a bolt / nut is used for joining various structures in places such as a ship or a windy structure where vibrations are severe, a nut is often loosened due to vibration. Therefore, a lock nut that can fundamentally solve this problem is used have.

A typical example of a lock nut is one in which two nuts are bolted to a bolt or a bolt is drilled to form a split pin to prevent loosening of the nut. In addition, a synthetic resin packing is inserted into the nut Although the nut is used, there is a problem that when the fastening is repeated several times, the locking force is lowered.

On the other hand, as another example of the lock nut, there is a lock nut that fixes in such a manner that the interval between the axial threads of the lock nut provided on the shaft is narrowed and finally tightened.

When such a lock nut is installed in contact with a component installed on the shaft, the axially threaded spacing of the locknut becomes narrower at the time of final tightening, so that adjacent parts and clearances are generated. If a clearance is formed between the lock nut and the adjacent shaft coupling member, vibration and noise are generated when the shaft rotates, and fatigue damage of the adjacent shaft coupling member occurs.

Japanese Unexamined Patent Application Publication No. 6-307425 (November 1, 1994)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a lock nut that does not generate a clearance between itself and an adjacent shaft coupling member installed on the shaft.

The object of the present invention is not limited to the above-mentioned objects, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to a first aspect of the present invention, there is provided a lock nut including a first main nut, a second main nut separated from the first main nut in a direction parallel to the central axis, a first main nut, An auxiliary nut fitted in an inner diameter position of the nut and provided in a ring shape having a coupling structure for supporting a distance between the first main nut and the second main nut, and an interval between the first main nut and the second main nut So as to change the surface pressure of the auxiliary nut toward the central axis.

Preferably, the locking portion includes a first bolt coupling hole formed in the first main nut parallel to the central axis, a second bolt coupling hole formed in the second main nut so as to face the first bolt coupling hole, And a locking bolt for adjusting an interval between the first main nut and the second main nut according to the degree of engagement with the first bolt coupling hole and the second bolt coupling hole.

Preferably, the auxiliary nut moves toward the central axis in accordance with the degree of engagement of the locking bolt with the first bolt coupling hole and the second bolt coupling hole.

Preferably, a projecting structure slidably moves on one side of the first main nut and one side of the second main nut on the basis of the pressure applied from the rotation of the locking bolt to the outer periphery of the auxiliary nut.

According to a second aspect of the present invention, there is provided a lock nut including a first main nut, a second main nut separated from the first main nut in a direction parallel to the central axis, At least two or more auxiliary nut shapes provided as part of a ring shape having an engagement structure that is fitted in an inner diameter position of a two-nuts nut to support a gap between the first main nut and the second main nut, And a locking portion that adjusts the distance between the second main nuts to change the surface pressure of the auxiliary nut object toward the central axis.

Advantageously, said auxiliary nut feature moves towards said central axis in accordance with the extent to which said locking bolt engages said first bolt coupling hole and said second bolt coupling hole.

Preferably, the protrusion structure slides on one side of the first main nut and one side of the second main nut on the basis of the pressure applied from the rotation of the locking bolt to the outer periphery of the auxiliary nut shape.

Therefore, in the present invention, by adjusting the distance between the first main nut and the second main nut of similar shapes through the bolt connection, the surface pressure of the auxiliary nut, which is fitted to the inner diameter positions of the first main nut and the second main nut, There is an advantage that it is possible to provide a lock nut in which a clearance is not generated between the adjacent shaft coupling members provided on the shaft.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a lock nut according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and is an exploded perspective view of a lock nut.
3 is a cross-sectional view of the first portion of the locking portion of FIG. 2;
4 is a cross-sectional view of the second portion of the locking portion of FIG. 2;
5 is a perspective view of a lock nut according to another embodiment of the present invention.
6 is a perspective view showing the auxiliary nut shape of FIG. 5 more specifically.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout the specification. "And / or" include each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

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

FIG. 1 is a perspective view of a lock nut according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and is an exploded perspective view of a lock nut.

1 and 2, a lock nut 100 according to an embodiment of the present invention is formed by adjusting a gap between a first main nut 110 and a second main nut 120 of a similar shape through a bolt connection The first main nut 110 and the auxiliary nut 130 fitted to the inner diameter position of the second main nut 120 can be changed.

With such a configuration of the lock nut 100, it is possible to prevent a clearance from being generated between adjacent shaft coupling members provided on the shaft.

2, the lock nut 100 includes a first main nut 110, a second main nut 120 which is separated from the first main nut 110 in a direction parallel to the central axis, And is formed in a ring shape having a coupling structure that is fitted in the inner diameter positions of the first main nut 110 and the second main nut 120 to support the gap between the first main nut 110 and the second main nut 120 And a locking portion 140 that changes the surface pressure of the auxiliary nut 130 toward the central axis by adjusting the distance between the first main nut 110 and the second main nut 120 .

The first main nut 110 includes a main nut body having a hexagonal cross section. Here, the main nut body may be changed to another cross sectional structure.

A first bolt coupling hole 141-1 is formed in the first main nut 110 so as to support a bolt coupling for adjusting the gap with the second main nut 120. [ The first bolt coupling hole 141-1 is formed in the longitudinal direction parallel to the axial center axis on which the adjacent shaft coupling member is placed.

The first bolt coupling hole 141-1 is for supporting the bolt connection between the first main nut 110 and the second main nut 120. The first main nut 110 and the second main nut 120, The first main nut 110 may be provided with a plurality of locking portions 140 depending on the number of the locking portions 140 that perform the bolt connection between the nuts 120.

The inner peripheral edge 112 of the first main nut 110 contacts or is spaced from the outer peripheral side of the auxiliary nut 130 according to the degree of bolt connection between the first main nut 110 and the second main nut 120 . That is, the inner circumferential edge 112 of the first main nut 110 and the outer circumferential edge of the auxiliary nut 130 are spaced apart from each other as will be described in detail below. However, the first main nut 110 and the second main nut 110, One side of the first main nut 110 and one side of the auxiliary nut 130 slide due to the locking action between the two main nuts 120 so that the auxiliary nut 130 moves in the direction of the central axis.

When the inner circumferential edge 112 of the first main nut 110 and the outer circumferential edge of the auxiliary nut 130 are in contact with each other, the first main nut 110 and the second main nut 120 Even if a locking operation is performed between the first main nut 110 and the second main nut 120 or the movement interval between the first main nut 110 and the second main nut 120 One side of the first main nut 110 and one side of the auxiliary nut 130 may not reach a level where they slide together.

The second main nut 120 also includes a main nut body having a hexagonal cross-section. Here, the main nut body may be changed to another cross sectional structure.

The second main nut 120 is formed with a second bolt coupling hole 141-2 opposed to the first bolt coupling hole 141-1 of the first main nut 110 in a direction parallel to the central axis . The second bolt coupling hole 141-2 is formed in the longitudinal direction parallel to the axial center axis on which the adjacent shaft coupling member is placed.

Like the first bolt coupling hole 141-1, the second bolt coupling hole 141-2 has a locking part 140 for performing bolt coupling between the first main nut 110 and the second main nut 120 As shown in FIG.

The inner circumferential edge 122 of the second main nut 120 contacts or is spaced from the outer circumferential side of the auxiliary nut 130 according to the degree of bolt connection between the first main nut 110 and the second main nut 120 .

2, the second bolt-fitting hole 141-2 is different from the first bolt-fitting hole 141-1 formed by the threaded portion, and has a screw portion for engaging with the locking bolt 142 as well as a locking bolt 142 ) May be included. Optionally, the second bolt coupling hole 141-2 may further include a head receiving portion for receiving the bolt head of the locking bolt 142.

Here, the second bolt coupling hole 141-2 is formed in a through-hole shape, and the first bolt coupling hole 141-1 is formed in a through-hole shape like the second bolt coupling hole 141-2 instead of the internal- Or the like.

The auxiliary nut 130 is inserted into the first main nut 110 and the second main nut 120 at an inner diameter position to support a gap between the first main nut 110 and the second main nut 120, As shown in Fig.

That is, when the bolt connection is performed such that the distance between the first main nut 110 and the second main nut 120 is narrowed, the auxiliary main nut 130 has a first main nut 110 and a second main nut 120 to the center axis to continuously support the gap between them. In fact, although the ring-shaped auxiliary nut 130 is not moved toward the central axis so as to be clearly visible, there is an effect that the surface pressure applied by the auxiliary nut 130 on the adjacent axis is increased.

At this time, the surface pressure applied by the auxiliary nut 130 on the axis can secure an axial support load for the fixture which is the adjacent shaft coupling member located on the inner side of the auxiliary nut 130 through the friction force between the auxiliary nut 130 and the shaft Of the maximum allowable surface pressure.

In addition, the width of the auxiliary nut 130 may be increased to satisfy the allowable surface pressure to increase the axial support load on the fixture.

The surface pressure of the auxiliary nut 130 on the axis occurs through the operation of the locking portion 140 described above.

The locking part 140 includes a first bolt coupling hole 141-1 formed in the first main nut 110 in parallel to the center axis and a second bolt coupling hole 141-1 formed in the second main nut 110. The first bolt coupling hole 141-1, The first bolt coupling hole 141-2 formed in the first bolt coupling hole 141 and the first bolt coupling hole 141-2 formed in the first bolt coupling hole 141-1 and the second bolt coupling hole 141-2, And a locking bolt 142 for adjusting the distance between the first main nut 120 and the second main nut 120.

When the locking bolt 142 is engaged with the first bolt coupling hole 141-1 and the second bolt coupling hole 141-2, the first main nut 110 And the second main nut 120 formed with the second bolt coupling hole 141-2 is narrowed so that the locking action between the first main nut 110 and the second main nut 120 .

The interval between the first main nut 110 and the second main nut 120 is continuously narrowed while the locking action between the first main nut 110 and the second main nut 120 is performed, The slide region 111 of the main nut 110 and the first region of the protruding structure 131 formed on the outer circumferential edge of the auxiliary nut 130 are peeled from each other in a state in which the first region faces the slide region 111 of the first main nut 110, (111) slides upward, and the first region of the protruding structure (131) slides downward. At the same time, the slide region 121 of the second main nut 120 and the second region of the protruding structure 131 are separated from each other and the slide region 121 of the second main nut 120 is moved upward And the second region of the protruding structure 131 slides downward. As a result, according to the result, the auxiliary nut 130 increases the surface pressure toward the central axis.

FIG. 3 is a cross-sectional view of a first portion of the locking portion 140 of FIG. 2, and FIG. 4 is a cross-sectional view of a second portion of the locking portion 140 of FIG. That is, a state in which the lock nut 100 is coupled to the shaft and the adjacent shaft engaging member.

3 and 4, when the lock nut 100 is disposed adjacent to the shaft coupling member in a state where the lock nut 100 is engaged with the shaft, the locking bolt 142 of the lock nut 100 is rotated counterclockwise or clockwise So that the locking bolt 142 can be advanced or retracted.

3, when the locking bolt 142 is in the retracted state before the locking bolt 142 is engaged with the first bolt coupling hole 141-1 of the first main nut 110, 110 and the second main nut 120 are not narrowed.

The auxiliary nut 130 fitted in the inner diametric positions of the first main nut 110 and the second main nut 120 can be fastened by bolts between the first main nut 110 and the second main nut 120 Because the transmitted force is not provided, it maintains the condition that it does not apply any surface pressure on the axis.

However, as shown in FIG. 4, the locking bolt 142 is inserted into the first bolt coupling hole 141-2 of the first main nut 110 as well as the second bolt coupling hole 141-2 of the second main nut 120 The interval between the first main nut 110 and the second main nut 120 is gradually narrowed corresponding to the degree of bolt fastening.

The auxiliary nut 130 fitted in the inner diametric positions of the first main nut 110 and the second main nut 120 can be fastened by bolts between the first main nut 110 and the second main nut 120 The first main nut 110 and the second main nut 120 slide along the first and second main grooves 110 and 121 to move in the axial direction do. That is, the auxiliary nut 130 is in a state of applying a surface pressure toward the axial center axis.

The inner peripheral edge 112 of the first main nut 110 and the first outer peripheral edge of the auxiliary nut 130 are separated from each other by the sliding movement of the auxiliary nut 130, And the second outer circumference of the auxiliary nut 130 is spaced apart.

FIG. 5 is a perspective view of a lock nut according to another embodiment of the present invention, and FIG. 6 is a perspective view showing the auxiliary nut shape of FIG. 5 more specifically.

5 and 6, a lock nut 200 according to another embodiment of the present invention adjusts a gap between a first main nut 210 and a second main nut 220 of a similar shape through a bolt connection So that the surface pressure of the at least two auxiliary nut shapes 230 fitted to the inner diameter positions of the first main nut 210 and the second main nut 220 can be changed.

With such a configuration of the detachable lock nut 200, it is possible to prevent a clearance from being generated between adjacent shaft coupling members provided on the shaft.

Specifically, the lock nut 200 includes a first main nut 210, a second main nut 220 spaced apart from the first main nut 210 in a direction parallel to the central axis, a first main nut 210, At least two auxiliary nut members 220 provided in a ring-shaped portion having an engagement structure that is fitted in the inner diameter position of the second main nut 220 and supports the gap between the first main nut 210 and the second main nut 220, And a locking portion that changes the surface pressure of each of the auxiliary nut objects 230 toward the central axis by adjusting the distance between the first main nut 210 and the second main nut 220.

The inner peripheral edge 212 of the first main nut 210 and the first outer peripheral edge 232 of the auxiliary nut 230 are separated from each other by the sliding movement of each of the auxiliary nut objects 230, The inner peripheral edge 222 of the main nut 220 and the second outer peripheral edge 234 of the auxiliary nut feature 230 are also spaced apart.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Further, since the present invention is to provide a lock nut in which no clearance is generated between the adjacent shaft coupling members provided on the shaft, there is a possibility that the lock nut is commercially available or operable, It is an available invention.

100, 200: lock nut 110, 210: first main nut
111, 121: Slide area 112. 122:
120, 220: second main nut 130: auxiliary nut
131, 231: protruding structure 140:
141: bolt coupling hole 141-1: first bolt coupling hole
141-2: second bolt coupling hole 142: locking bolt
230: auxiliary nut feature 232: first outer periphery
234: second outer circumference

Claims

A first main nut;
A second main nut which is separated from the first main nut in a direction parallel to the central axis;
An auxiliary nut fitted in an inner diameter position of the first main nut and the second main nut and provided in a ring shape having a coupling structure for supporting an interval between the first main nut and the second main nut; And
And a locking portion that adjusts an interval between the first main nut and the second main nut to change a surface pressure of the auxiliary nut toward the central axis.

The method according to claim 1,
Wherein,
A first bolt coupling hole formed in the first main nut parallel to the central axis;
A second bolt coupling hole formed in the second main nut opposite to the first bolt coupling hole;
And a locking bolt for adjusting an interval between the first main nut and the second main nut according to the degree of engagement with the first bolt coupling hole and the second bolt coupling hole.

3. The method of claim 2,
And the auxiliary nut moves toward the central axis according to the degree of engagement of the locking bolt with the first bolt coupling hole and the second bolt coupling hole.

3. The method of claim 2,
And a protruding structure slidably moving on one side of the first main nut and one side of the second main nut on the basis of the pressure applied from the rotation of the locking bolt to the outer periphery of the auxiliary nut.

A first main nut;
A second main nut which is separated from the first main nut in a direction parallel to the central axis;
At least two or more auxiliary nut shapes provided as part of a ring shape having an engagement structure that is fitted in the inner diameter positions of the first main nut and the second main nut to support the gap between the first main nut and the second main nut ;
And a locking portion for adjusting a gap between the first main nut and the second main nut to change a surface pressure of the auxiliary nut object toward the central axis.

6. The method of claim 5,
Wherein,
A first bolt coupling hole formed in the first main nut parallel to the central axis;
A second bolt coupling hole formed in the second main nut opposite to the first bolt coupling hole;
And a locking bolt for adjusting an interval between the first main nut and the second main nut according to the degree of engagement with the first bolt coupling hole and the second bolt coupling hole.

The method according to claim 6,
Wherein the auxiliary nut shape moves toward the central axis according to the degree of engagement of the locking bolt with the first bolt coupling hole and the second bolt coupling hole.

The method according to claim 6,
Wherein a projecting structure for sliding movement is formed on one side of the first main nut and one side of the second main nut on the basis of the pressure applied from the rotation of the locking bolt to the outer periphery of the auxiliary nut shape.