KR102085616B1 - A washer for preventing release of nuts - Google Patents

Abstract

The present invention relates to a nut loosening washer provided with a wedge device in an annular flat annular shape to prevent rotation of the nut by engaging the bottom surface of the nut when the nut rotates. The wedge device (10) is a washer (1). Wedge member 15 is provided in at least one position formed in the width portion in the radial direction of the wedge member 15 is disposed in the opening (5) formed in the width portion in the radial direction of the washer 1 and the wedge-shaped pointed projection 13 is formed on the top. ), Inserted into the shaft hole 6 'formed in the radial direction of the washer toward the opening portion 5 from the outer circumferential surface thereof, and fitted into the shaft hole 6' formed at the side of the opening to rotatably support the wedge member 15. It is arranged between the support pin 11, the opening portion 5 and one side of the wedge member 15 to apply an elastic force to maintain the initial position of the wedge member 15, the protrusion 13 is directed upward Including an elastic member 17 to In this configuration, the wedge member is engaged with the bottom surface of the nut in the loosening direction of the nut so that the nut cannot rotate, thereby reliably preventing the nut from loosening, thereby improving the reliability and safety of the product.

Description

Nut loosening washer {A WASHER FOR PREVENTING RELEASE OF NUTS}

The present invention relates to a washer to prevent the nut is fastened to the bolt to loosen with respect to the bolt, in particular, the nut screwed to the threaded portion of the bolt is automatically released by vibration, etc. It relates to a nut loosening washer of the improved structure to be engaged so that it is not possible to rotate the nut once tightened to prevent loosening.

In general, the washers are inserted between the parts under the bolts and nuts when fixing the parts with bolts and nuts, and are used to protect the base material of the parts and to prevent loosening of the bolts and nuts. In addition, anti-loosening nuts may be used so that the nut cannot be loosened due to vibration or impure intention. These anti-loosening washers are primarily intended to act as springs that fill the gap between the bolt head and the nut or screw head and the object to be secured.In addition to this spring action, some washers are notched into the object and screw head. It is also configured to prevent loosening.

Examples of such an anti-loosening washer have a spring action, a conical washer to prevent loosening only by friction, a spiral spring washer widely used as a lock washer, and a tooth-shaped washer on an inner diameter or an outer circumferential surface thereof.

As an example of such an anti-loosening washer, Korean Patent No. 10-1535989 (Registration Date July 06, 2015), a bolt insertion hole is formed in the center, the washer body portion is seated on the upper head bolt or nut; A catching jaw formed so that an edge of the bolt head or nut is caught on the upper surface of the washer body when the bolt or nut is rotated in a tightening direction; And an inclined surface formed on the upper surface of the washer body in contact with the bottom surface of the bolt head or nut when the bolt or nut is rotated in the unwinding direction so that the bolt head or nut rides up. An anti-loosening washer is disclosed that includes a side inclined surface formed outside of a line corresponding to each bottom edge of the nut and a bottom inclined surface extending inwardly of a line corresponding to each bottom edge of the nut.

Other examples of anti-loosening washers are disclosed in Korean Utility Model Publication No. 1998-030528 (published August 17, 1998), Korean Utility Model Publication No. 1998-059747 (published November 05, 1998), and Utility Model No. 20-0450860 (registered date November 1, 2010) is also disclosed.

However, these conventional nut loosening washers can be loosened as the wedge-shaped protrusions formed on the nut are deformed or crushed when the nut is rotated with force, thereby improving the anti-loosening structure to obtain a more complete anti-loosening effect. A nut was required.

Korea Patent Registration No. 10-1535989 (Registration date July 06, 2015) Korean Utility Model Publication No. 1998-030528 (published August 17, 1998) Korean Utility Model Publication No. 1998-059747 (Date of Nov. 5, 1998) Utility Model Registration No. 20-0450860 (Registration date November 01, 2010)

An object of the present invention is to solve the problem with the conventional anti-loosening wash, by installing at least one wedge device to prevent the loosening of the nut in the washer in the radial direction while the wedge action for the nut while loosening while allowing the rotation of the nut In order to prevent the nut from loosening it is to provide a nut preventive washer of the improved structure.

In order to achieve the above object, the nut loosening washer according to the present invention is provided with a wedge device in an annular flat annular shape to prevent the nut loosening washer to prevent rotation of the nut by engaging the bottom of the nut when the nut rotates. To

The wedge device is provided in at least one place formed in the width portion in the radial direction of the washer,

Wedge member is disposed in the opening formed in the width portion in the radial direction of the washer and formed with a wedge-shaped sharp protrusion on the top,

A support pin inserted into the shaft hole formed in the radial direction of the washer from the outer circumferential surface toward the opening to be inserted into and fixed to the shaft hole formed on the side of the opening, and rotatably supporting the wedge member;

It is characterized in that it comprises an elastic member which is disposed between the one side of the wedge member in the opening portion and the elastic member for applying an elastic force to maintain the initial position of the wedge member facing upwards.

The distance from the center of the support pin to the protrusion of the wedge member is formed larger than the thickness of the washer.

It is preferable that the lower part of the wedge member has a projecting pointed downwardly and is formed symmetrically with the protruding part formed at the upper part at the center of the support pin.

The elastic member has a 'U' shape in cross section, one side of which is disposed on the side wall of the opening, and the other side of the elastic member contacts the side of the wedge member so that the elastic member exerts an elastic force such that the protrusion is maintained upward.

Alternatively, the wedge member may have at least two protrusions formed thereon, and the distance from the center of rotation of the wedge member to the upper end of the second protrusion is greater than the distance from the top of the first protrusion. Is formed.

At least two protrusions formed on the upper portion of the wedge member may be formed symmetrically with respect to the center of rotation of the lower portion of the wedge member.

According to the present invention, at least one wedge device is installed in the radial direction of the washer, and the wedge member is engaged with the bottom surface of the nut in the loosening direction of the nut so that the nut cannot rotate, thereby reliably preventing the nut from loosening, thus ensuring the reliability of the product. And safety is improved.

1 is a schematic exploded perspective view of a washer in which the wedge preventing device according to the present invention is disassembled.
Figure 2 is a perspective view of the wedge device of Figure 1 assembled to the washer.
Figure 3 is a schematic cross-sectional view showing the initial state of the wedge device when using the anti-loosening washer of Figure 1;
4 is a schematic cross-sectional view showing the changed position of the wedge member of the wedge device provided in the washer when the nut is fastened in the initial state of FIG.
5 is a cross-sectional view showing a modification of the wedge member in the wedge device of FIG.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the nut loosening washer according to the present invention will be described in more detail the present invention.

1 to 4, the nut loosening washer 1 according to the present invention has an annular flat conventional shape in which a hole 3 is formed at the center so that the shaft portion 2 of the bolt, which is not shown in the drawing, penetrates. At least one wedge device 10 is provided in the radial width portion of the washer 1.

The wedge device 10 is disposed in the opening portion 5 formed in the radial width portion of the washer 1 and the wedge member 15, the wedge-shaped pointed protrusions 13 are formed in the upper portion, the radial direction of the washer 1 The wedge member 15 is inserted into and fixed to the shaft hole 6 'formed at the side of the opening through the shaft hole 6 formed toward the opening portion 5 from the outer circumferential surface in the radial direction of the washer in the opening portion 5 formed in the width portion. Support pins 11 which are rotatably supported, and are arranged between the openings 5 and one side of the wedge members 15 to maintain the initial position of the wedge members 15 with the protrusions 13 facing upwards. It includes an elastic member 17 to apply an elastic force to.

The support pin 11 is inserted through the shaft hole 6 formed radially inward from the outer circumferential surface of the washer 1 so that the end is inserted into and fixed to the shaft hole 6 'formed at the side of the opening 5.

The support pin 11 may be completely inserted into the shaft hole 6 formed on the outer circumferential surface of the washer so that the end does not protrude from the outer circumferential surface so that the support pin 11 cannot be removed. The end portion may be formed to protrude from the outer circumferential surface in the shaft hole 6 so that the 11 can be removed.

The wedge member 15 is formed with a through hole 12 in the lateral direction, the protrusion 13 formed sharply on the upper portion of the wedge member 15 in the opening portion 5 formed in the washer 1 is directed upward. The support pin 11 is inserted through the through hole 12 so as to be rotatable. The distance from the center of the support pin 11 to the protrusion 13 of the wedge member 15 is greater than the thickness of the washer.

In addition, it is preferable that a protrusion 13 'downwardly pointed at the lower portion of the wedge member 15 is symmetrically formed at the center of the support pin 11 with respect to the protrusion 13.

In the illustrated embodiment, the elastic member 17 has a U-shaped cross section, one side of which is disposed on the side wall of the opening 5, and the other side of the elastic member 17 is in contact with the side surface of the wedge member 15. The elastic force is applied so that the protrusion 13 is maintained upward. The elastic member 17 is arranged to exert an elastic force in a direction against the rotation of the wedge member 17 in the rotational direction when the nut is tightened.

 The action of the nut is fastened and the loosening is prevented with such a loosening washer structure will be described with reference to FIGS.

As shown in FIG. 3, in the state where the washer 1 is fitted in the shaft portion 2 of the bolt, the wedge device 10 according to the present invention is mounted in the opening 5 formed in the radial portion of the washer 1.

When the nut 20 is rotated in a clockwise direction to the shaft portion 2 of the bolt, the bottom surface of the nut 20 is perpendicular to the top surface of the washer 1 in the wedge member 15 of the wedge device 10. 4 is pushed to the left in the drawing with respect to the protruding portion 13 protruding upwards, wherein the opposite side of the elastic member 17 disposed on the left side of the wedge member 15 is elastically deformed inwardly. 15 is laid counterclockwise so that the nut 20 can be fastened. At this time, the protrusion 13 of the wedge member 15 is maintained in close contact with the bottom surface of the nut 20 by the restoring force of the side of the deformed elastic member 17.

Then, when the nut 20 is intentionally loosened in a fastened state or the nut 20 is rotated counterclockwise in FIGS. 1 and 4 due to vibration in the direction in which the nut is loosened, the nut 20 The protrusion 13 of the wedge member 15 in close contact with the bottom surface of the wedge member 15 rotates in a clockwise direction indicated by an arrow in FIG. 4 by frictional force with the bottom of the nut, and the protrusion 13 protrudes above the top surface of the washer 1. As the engagement with the bottom surface of the nut 20 and the force applied to rotate the nut further, the protrusion 13 is dug into the bottom of the nut 20, so that the protrusion 13 can no longer rotate, the nut 20 It becomes impossible to rotate also, and the nut loosening prevention effect is acquired.

At this time, the pointed protrusion 13 'formed at the bottom of the wedge member 15 is engaged with the surface of the base material fastened by the bolt and the nut, so that the rotation of the wedge member 15 in the direction in which the nut 20 is released. More disturbed, so that the nut's anti-loosening action is more assured.

In FIG. 5, as a modification of the wedge member 15, a plurality of protrusions 13 and 131 formed on an upper portion of the wedge member 15 are shown. In the modification illustrated in FIG. 5, two protrusions 13 and 131 are shown. But more than two can be formed.

In addition, it is preferable that the distance from the center of rotation of the wedge member 15, that is, the distance from the center of the support pin to the upper end of the second protrusion 131 is greater than the distance from the upper end of the first protrusion 13.

Thus, as the distance from the center of rotation of the second protrusion 131 is increased more than the first protrusion 13 of the wedge member 15, the rotation of the nut 20, which is engaged with the protrusions 13 and 131, is reduced. By becoming more difficult, the effect of preventing loosening of the nut is more certain.

In addition, although the configuration of the protrusions 13 and 131 as described above is not shown in the figure, the lower part of the wedge member 15 is formed symmetrically with respect to the center of rotation thereof, thereby preventing the loosening of the nut even more reliably.

The present invention can be used to prevent loosening of the nut in the washer provided between the nut and the base material fastened to the bolt.

1: washer 2: nut
5: opening 6,6 ': shaft hole
10: wedge device 11: support pin
13,131: protrusion 15: wedge member
17: elastic member

Claims (6)

And a wedge device (10) provided in the opening portion (5) formed at least in one width portion in the radial direction of the washer (1) so as to engage the bottom surface of the nut to prevent the nut from rotating when the nut rotates. 10 is disposed in the opening (5) formed in the radial width portion of the washer (1) and the wedge member (15) having a wedge-shaped protruding portion (13) formed on the top and the elastic force acting on the wedge member (15) In a nut washer preventing washer comprising an elastic member (17),
The wedge member 15 is inserted through the shaft hole (6) formed in the radial direction of the washer toward the opening portion 5 in the radial direction of the washer in the opening portion 5, the support pin is fitted and fixed to the shaft hole (6 ') formed on the side of the opening Rotatably supported by (11),
The wedge member 15 has a distance from the center of the support pin 11 to the protrusion 13 of the wedge member 15 is greater than the thickness of the washer, and is pointed downward even below the wedge member 15. The protrusion 13 'is formed to be symmetrical with the protrusion 13 at the center of the support pin 11, the distance from the center of rotation of the wedge member 15 to the upper end than the distance from the upper end of the first protrusion 13 The second protrusion 131 is formed in a shape where the distance is further increased,
The elastic member 17 has a U-shaped cross section, one side of which is disposed on the side wall of the opening 5, and the other side of the elastic member 17 contacts the side of the wedge member 15 so that the protrusion 13 faces upward. A nut loosening washer, characterized in that the elastic force is applied to maintain the initial position of the member (15).


















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