JP6869458B2 - Nylon washer nut - Google Patents

Description

The present invention relates to a nut with a washer used for a fixing bolt or the like.

Generally, as a nut with a washer, an annular locking portion is projected around a screw hole on the bottom surface of a nut having a screw hole penetrating in the axial direction in the central portion, and the annular locking portion is formed from the screw hole. It is known that a washer made of a flat metal plate having a large-diameter through hole is inserted and crimped.

Then, the washer provided on the bottom surface of the nut increases the contact surface with the fixed member, stabilizes the seat surface between the nut and the fixed member, and prevents the nut from rotating. There is.

However, according to the above-mentioned conventional washer made of a flat metal plate, for example, when a nut with a washer is tightened to a metal fixed member and used, metal contact with each other causes electrolytic corrosion or metal. There is a problem that the washer may damage the seat surface of the member to be fixed, and the biggest problem is that there is a possibility that an abnormal noise may be generated due to the contact between the metals of the fastening portion generated at the time of vibration. In addition, there is a problem that it is difficult to exert the anti-loosening effect.

Therefore, in the present invention, the nylon washer is integrated with the nut to facilitate the assembling work, and moreover, by eliminating the contact between the metals, electrolytic corrosion occurs and the seat surface is scratched, especially between the metals of the fastening portion which occurs during vibration. An object of the present invention is to provide a nut with a nylon washer that can prevent the generation of abnormal noise due to contact.

The invention according to claim 1 of the present application comprises a nut body having a screw hole formed in the center portion in the axial direction and a flange portion integrally connected to the lower portion of the nut body. Around the screw hole on the bottom surface of the screw hole, an annular locking portion having a diameter larger than that of the screw hole and projecting downward is provided, while a flat plate-shaped nylon washer having a through hole is inserted on the outer periphery of the annular locking portion. Further, the annular washer is characterized in that the nylon washer is rotatably crimped to the bottom surface of the flange portion by caulking outward in the radial direction of the tip portion.

The invention of claim 2, wherein, in the structure according to claim 1, the upper portion of the nut body, an inner peripheral surface a plurality of convex shape protruding radially inwardly by an arcuate same diameter as the inner diameter of the threaded hole It is characterized in that a flat plate-shaped anti-loosening elastic washer having an arc-shaped and a plurality of concave engaging portions having a diameter larger than the valley diameter of the engaging portion and the screw hole is fixed by caulking.

In the invention according to claim 3 of the present application, an annular locking portion having a diameter larger than that of the screw hole and projecting downward is provided around the screw hole on the bottom surface of the nut having a screw hole penetrating in the axial direction in the central portion. At the same time, a flat plate-shaped nylon seat having a through hole is inserted into the outer periphery of the annular locking portion, and the nylon seat is placed on the bottom surface of the nut by caulking the tip portion of the annular locking portion outward in the radial direction. While rotatably crimped , a series of cylindrical bosses that extend upward from the top surface of the nut and have screw holes that are continuous with the screw holes of the nut are provided in the center, and the thickness of the cylindrical boss is thick. A compression deformation part that is formed thinner than the wall thickness of the nut and is formed by deforming the tip of the cylindrical boss from the outer circumference to the inside by two pitches of the screw hole and at the same time deforming the screw hole diameter and the screw hole pitch. Is formed.

According to claim 1 the nylon washer nut according to the present invention, since the nylon washer on the bottom surface of the flange portion of the nut includes a nut body and a flange portion integrally is mounted integrally, nylon washer nut The work of assembling to the fixed member can be easily performed, and by adopting the nylon washer, when the nut with the nylon washer is assembled to the fixed member, the metal does not come into contact with each other, causing electrolytic corrosion and the seat surface. It is possible to prevent scratches, and it is possible to prevent the generation of abnormal noise due to the contact between the metals of the fastening part that occurs during vibration, which is the biggest problem, and in addition, the seat surface that the washer originally requires due to the characteristics of the nylon washer. It can also stabilize and prevent loosening. Moreover, since the pressure contact area can be positively expanded by providing the flange portion on the nut body, the seating surface is further stabilized and loosened, and the difference due to the metal-to-metal contact of the fastening portion that occurs during vibration. The effect of preventing sound generation can be enhanced.

According to the nut with a nylon washer according to claim 2 of the present invention, since the nylon washer is integrally attached to the flange portion at the lower part of the nut body, the same action and effect as that of claim 1 described above can be obtained. Since the anti-loosening elastic washer is provided on the upper part of the nut body, the anti-loosening elastic washer can apply pressure to the thread of the bolt to increase the friction torque when the bolt is screwed into the nut. As a result, it becomes possible to exert the anti-loosening action of nuts and bolts more reliably and effectively, and in combination with the adoption of anti-loosening means by this elastic washer and nylon washer, metal contact noise due to vibration Can be prevented more reliably. Further, by selecting the uneven shape of the anti-loosening elastic washer, it is possible to easily screw the bolt into the bolt by hand, improve workability, and prevent the thread from being scratched or seized.

According to the nut with a nylon washer according to claim 3 of the present invention, since the nylon washer is integrally attached to the bottom surface of the nut, the work of assembling the nut with a nylon washer to the fixed member can be easily performed. By adopting a nylon washer, when a nut with a nylon washer is assembled to a member to be fixed, it is possible to prevent galvanic corrosion and damage to the seat surface by eliminating contact between metals, and vibration is the biggest problem. It is possible to prevent the generation of abnormal noise due to the contact between the metals of the fastening portion that sometimes occurs, and in addition, the characteristics of the nylon washer can stabilize the seat surface and prevent loosening, which is originally required by the washer. Moreover, a thin-walled cylindrical boss extending integrally upward from the upper surface of the nut is continuously provided, and the tip of the cylindrical boss is deformed inward from the outer circumference by two pitches of the screw hole, and at the same time, the screw hole diameter and the screw hole are formed. Since the compression deformation part formed by deforming the pitch is formed, when the bolt is screwed into the nut, the compression deformation part located at the tip of the cylindrical boss applies pressure to the screw thread of the bolt to increase the friction torque. Can be made to. As a result, it becomes possible to more reliably and effectively exert the anti-loosening action of nuts and bolts, and in combination with the adoption of anti-loosening means by this compression deformation part and nylon washers, metal contact due to vibration The generation of sound can be prevented more reliably.

It is a partial notch side view of the nut with a nylon washer according to Reference Example 1. It is a front view of the nut with a nylon washer which concerns on Reference Example 1. It is a partial notch side view of the nut with a nylon washer having a flange part which concerns on this invention. It is a partial notch side view of the nut with a nylon washer having an elastic washer according to Reference Example 2. FIG. 5 is a front view of a nut with a nylon washer having an elastic washer according to Reference Example 2. It is a partially cutaway side view of the nut with a nylon washer having a flange portion and an elastic washer according to the present invention. It is a front view of the nut with a nylon washer having a flange part and an elastic washer which concerns on this invention. It is a partial notch side view of the nut with a nylon washer of another nut shape which concerns on this invention. It is a front view of the nut with a nylon washer of another nut shape which concerns on this invention.

Hereinafter, the nut with a nylon washer according to the present invention will be described with reference to the drawings.

First, FIGS. 1 and 2 show a nut with a nylon washer according to Reference Example 1, and the nut N with a nylon washer is a nut 1 having a screw hole 11 formed in a central portion in the axial direction and the nut. A flat plate-shaped nylon washer 2 that is crimped is provided on the bottom surface of 1.

An annular locking portion 12 that is concentric with the screw hole 11 and has a diameter larger than the valley diameter of the screw hole 11 is provided on the bottom surface of the nut 1. The shape of the nut 1 may be a hexagon in front view as shown in FIG. 2, or may be a polygon such as a quadrangle or an octagon or a cylinder.

The nylon washer 2 is made of an elastic plate made of nylon, and has a through hole 21 that can be inserted into the outer periphery of the annular locking portion 12 at the center thereof. An annular convex engaging piece 22 projecting inward in the radial direction is provided on the inner surface of one end of the through hole 21. The thickness of the nylon washer 2 is formed to be thicker than the protruding dimension of the tip of the annular locking portion 12 so that the tip of the annular locking portion 12 does not protrude below the seating surface of the nylon washer 2 when caulking. There is.

Then, the nylon washer 2 is inserted into the outer periphery of the annular locking portion 12, and in that state, the tip portion of the annular locking portion 12 is caulked outward in the radial direction to expand the annular washer, as shown in FIG. The tip of the stop portion 12 and the convex engaging piece 22 of the nylon washer 2 are engaged with each other, whereby the nylon washer 2 is rotatably crimped to the bottom surface of the nut 1.

Next, the operation of this nylon washer nut will be described.

At the time of use, the nylon washer nut N is manually screwed into the bolt (not shown) inserted into the fixed member (not shown), and then the nylon washer nut N is appropriately tightened with a tightening tool. The member to be fixed (not shown) is firmly tightened before use.

In that case, since the nylon washer 2 is integrally attached to the nut 1, the work of assembling the nylon washer nut N to the fixed member can be easily performed. Further, by adopting the nylon washer 2 as the washer, when the nut N with the nylon washer is assembled to the fixed member, it is possible to prevent metal-to-metal contact and prevent electrolytic corrosion and damage to the seat surface. In particular, it is possible to prevent the generation of abnormal noise due to the contact between the metals of the fastening portion, which is generated during vibration, which is the biggest problem. In addition, due to the characteristics of the nylon washer 2, the seating surface that is originally required by the washer can be stabilized and the effect of preventing loosening can be exhibited.

Next, FIG. 3 shows an embodiment of a nut with a nylon washer according to the present invention, in which the nut 1 is integrated with a nut body 10 having a screw hole formed in the central portion in the axial direction and a lower portion of the nut body. An annular locking portion 12 having a diameter larger than that of the screw hole 11 and projecting downward is provided around the screw hole 11 on the bottom surface of the flange portion 10a of the nut 1, which is formed from the flange portion 10a connected to the nut 1. A flat plate-shaped nylon washer 2 having a through hole 21 is inserted into the outer periphery of the annular locking portion 12, and the tip portion of the annular locking portion 12 is caulked outward in the radial direction to form nylon on the bottom surface of the flange portion 10a. The washer 2 is rotatably crimped. In the figure, the members common to the above-described embodiment are described with the same reference numerals.

Even in this configuration, since the nylon washer 2 is integrally attached to the nut 1 having the flange portion 10a integrally provided at the lower part of the nut body 10, the same operation and effect as in the above-mentioned reference example 1 can be obtained. In addition to being obtained, the pressure contact area can be positively expanded by providing the flange portion 10a, so that the seat surface is further stabilized and loosened as a whole, and abnormal noise due to the metal-to-metal contact of the fastening portion generated during vibration is generated. The effect of preventing the occurrence can be enhanced.

Further, FIGS. 4 and 5 show another reference example 2. In addition to the structure of the reference example 1 shown in FIG. 1, the diameter of the upper part of the nut 1 is substantially the same as the inner diameter of the screw hole 11 on the inner peripheral surface. A flat plate-shaped anti-loosening elastic having a plurality of convex engaging portions 31 having an arc shape and protruding inward in the radial direction and a plurality of concave engaging portions 32 having an arc shape having a diameter larger than the valley diameter of the screw hole 11. The washer 3 is crimped and fixed.

Even in this configuration, since the nylon washer 2 is integrally attached to the lower part of the nut 1, the same effect as that of the first reference example 1 described above can be obtained, while the effect of the nut 1 is obtained. Since the anti-loosening elastic washer 3 is positively provided on the upper part, when the bolt is screwed into the nut 1, the anti-loosening elastic washer 3 applies pressure to the thread of the bolt to positively increase the friction torque. Can be done. As a result, it becomes possible to more reliably and effectively exert the anti-loosening action of the nut 1 and the bolt, and the adoption of the anti-loosening means by the elastic washer 3 and the adoption of the nylon washer 2 are combined. It is possible to more reliably prevent the generation of metal contact noise due to vibration. Further, by selecting the uneven shape of the anti-loosening elastic washer 3, the screw can be easily screwed into the bolt by hand, the workability can be improved, and the thread can be prevented from being scratched or seized.

6 and 7 show another embodiment of the nut with a nylon washer according to the present invention, and in addition to the structure of the embodiment of the nut with a nylon washer having a flange portion shown in FIG. 3, the nut body 10 On the upper part of the screw hole 11, a plurality of convex engaging portions 31 having an arc shape having substantially the same diameter as the inner diameter of the screw hole 11 and protruding inward in the radial direction, and an arc shape having a diameter larger than the valley diameter of the screw hole 11 A flat plate-shaped anti-loosening elastic washer 3 having a plurality of concave engaging portions 32 is caulked and fixed.

Even in this configuration, the nylon washer 2 is integrally attached to the flange portion 10a integrally provided at the lower part of the nut body 10, so that the operation and effect of the embodiment shown in FIG. 3 described above are the same. On the other hand, since the anti-loosening elastic washer 3 is positively provided on the upper part of the nut body 10, when the bolt is screwed into the nut 1, the anti-loosening elastic washer 3 applies pressure to the thread of the bolt. The friction torque can be positively increased. As a result, it becomes possible to more reliably and effectively exert the loosening prevention action of the nut 1 and the bolt, and the use of the loosening prevention means by the elastic washer 3 and the nylon washer 2 is combined with the vibration. It is possible to more reliably prevent the generation of metal contact noise. Further, by selecting the uneven shape of the anti-loosening elastic washer 3, it is possible to easily screw the bolt into the bolt by hand, improve workability, and prevent the thread from being scratched or seized.

Further, FIGS. 8 and 9 show another embodiment of the nut with a nylon washer according to the present invention . In addition to the structure of Reference Example 1 shown in FIG. 1, a cylindrical boss 13 is provided on the upper portion of the nut 1. It is integrally installed, and at the tip of the cylindrical boss 13, a plurality of locations or the entire circumference are deformed from the outer circumference to the inside by two pitches of the screw hole 11 by pressing, and at the same time, the screw hole diameter and the screw hole pitch are deformed. 13a ... 13a are formed as compression deformation portions (three points of caulking prevention portions in the figure).

Even when configured in this manner, since the nylon washer 2 on the bottom of the same manner as in Reference Example 1 nut 1 shown in FIG 1 is mounted integrally, the same effects as in Reference Example 1 shown in FIG. 1 On the other hand, a thin cylindrical boss 13 extending integrally upward from the upper surface of the nut 1 is continuously provided, and the periphery of the thin cylindrical boss 13 is pressed from the outer circumference to the inside by two pitches of the screw hole. Since the compression deformed portions 13a ... 13a formed by deforming the screw hole diameter and the screw hole pitch at the same time as the deformation, the position is located at the tip of the cylindrical boss 13 when the bolt is screwed into the nut 1. The compression deformed portions 13a ... 13a can apply pressure to the thread of the bolt to increase the friction torque. As a result, it is possible to reliably and effectively exert the loosening prevention action of the nut 1 and the bolt, and the use of the loosening prevention means by the compression deformation portions 13a ... 13a and the nylon washer 2 is combined. It is possible to more reliably prevent the generation of metal contact noise due to vibration.

In the embodiment shown in the figure, as the compression deformation portion 13a, a three-point caulking loosening prevention portion was formed by pressing as shown in FIG. 9, but the number is not limited to three, and two or four points are not limited. It may be other than 3 points, or it may be the entire circumference.

N Nylon washer nut 1 Nut 10 Nut body 10a Flange part 11 Screw hole 12 Circular locking part 13 Cylindrical boss 13a Compression deformation part 2 Nylon washer 21 Through hole 22 Convex engaging piece 3 Loosening prevention elastic washer 31 Convex Joint part 32 Concave engagement part

Claims (3)

The nut consists of a nut body having a screw hole that penetrates in the central part in the axial direction and a flange part that is integrally connected to the lower part of the nut body. While an annular locking portion having a large diameter and protruding downward is provided, a flat plate-shaped nylon washer having a through hole is inserted in the outer periphery of the annular locking portion, and the radius of the tip portion of the annular locking portion. A nut with a nylon washer, which is characterized in that a nylon washer is rotatably crimped to the bottom surface of the flange by caulking outward in the direction. On the upper part of the nut body, a plurality of convex engaging parts having an arc shape having the same diameter as the inner diameter of the screw hole and protruding inward in the radial direction on the inner peripheral surface, and a plurality of arc shapes having a diameter larger than the valley diameter of the screw hole. The nut with a nylon washer according to claim 1, wherein a flat plate-shaped anti-loosening elastic washer having the concave engaging portions of the above is fixed by caulking. An annular locking portion having a diameter larger than the screw hole and protruding downward is provided around the screw hole on the bottom surface of the nut having a screw hole penetrating in the central portion in the axial direction. A flat plate-shaped nylon seat with a through hole on the outer circumference is inserted, and the nylon seat is rotatably crimped to the bottom surface of the nut by caulking the tip of the annular locking portion outward in the radial direction. Cylindrical bosses that extend upward from the upper surface of the nut and have screw holes that are continuous with the screw holes of the nut in the center are connected in series, and the wall thickness of the cylindrical boss is formed to be thinner than the wall thickness of the nut. At the same time, a compression deformation portion is formed at the tip of the cylindrical boss, which is formed by deforming the screw hole from the outer circumference by two pitches inward and at the same time deforming the screw hole diameter and the screw hole pitch. Nut with nylon seat.

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