KR20170002800U

KR20170002800U - A Double screw of a Bolt and Nut

Info

Publication number: KR20170002800U
Application number: KR2020160000503U
Authority: KR
Inventors: 안광제
Original assignee: 김민자
Priority date: 2016-01-28
Filing date: 2016-01-28
Publication date: 2017-08-07

Abstract

The present invention relates to a screw having a double pitch formed for mutual fastening between two types of bolts and nuts having a first pitch and a second pitch, A first threaded portion formed with a first threaded portion; And a second screw portion having a second pitch formed by cutting the first screw portion to fasten another bolt and nut to the first screw portion,
Two kinds of threads made of a first pitch and a second pitch are formed in one thread, and two kinds of bolts and nuts different from each other can be easily and commonly fastened to one joint, and one nut It is possible to reduce the purchase cost of bolts and nuts by fastening two kinds of bolts or nuts to the bolts.

Description

A double screw of a bolt nut.

The present invention relates to a double pitch screw of a bolt nut. More particularly, the present invention relates to a double pitch screw of a bolt nut, and more particularly to a bolt nut having two threads of a first pitch and a second pitch formed on one thread, The present invention relates to a double pitch screw of a bolt nut which can be easily and commonly fastened to a pair of bolts or nuts and which can reduce the purchase cost of bolts or nuts by fastening two bolts or nuts to one nut or bolt having two threads. will be.

Generally, bolts and nuts are most commonly used to connect pipes, buildings, bridges, and members of various mechanical devices together.

These bolts and nuts have different axial forces and pitches depending on their dimensions, and the dimensions of the bolts and nuts are determined according to such pitches.

That is, a bolt and a nut having threads corresponding to the pitch are determined, and they have a coupling force between the members through mutual fastening.

In order to fasten the bolts and nuts to each other, one bolt and nut having the same pitch should be tightened. When connecting bolts and nuts having different pitches, separate couplings may be provided for mutual fastening.

When bolts and nuts are fastened together, bolts and nuts having double pitches for pulleys or perfect fastening have been developed and used, and Japanese Patent Application Laid-Open No. 10-2011-0003996 entitled "Bolt Nut Assembly Having Double Helical Structure" It is public.

6, the bolt nut assembly 100 includes a nut 110 through which the insertion hole 112 having the female thread 114 formed therein is inserted. The bolt nut assembly 100 has a double- The bolt 120 is formed on the outer circumferential surface of the male thread 122 so as to be fastened to the female thread 114 of the nut 110. The male thread 122 includes a first thread top 124 having a relatively low height, The relatively high second thread tops 126 are alternately and repeatedly formed and the female thread 114 has a first thread thread 116 having a relatively shallow depth and a second thread thread 118 having a relatively deep depth Are alternately and repeatedly formed so that the first threaded portion 124 of the bolt 120 is fitted to the first threaded bore 116 of the nut 110 and the second threaded portion 126 of the bolt 120 is fitted to the first threaded portion 116 of the nut 110, (118) of the first threaded portion (110) and fastened together.

However, the conventional bolt-nut assembly having the above-described double-helical structure prevents the torsion of the bolt and the nut from being tilted or twisted to be fixed to the threaded boss having a different height at the same height, However, since the two types of bolts or nuts having different pitches can not be fastened, there is a problem in that when a nut is fastened to two types of bolts having different pitches, And two types of bolts and nuts corresponding to the respective pitches must be provided, thus increasing the purchase cost.

It is an object of the present invention to solve the problems of the prior art as described above and it is an object of the present invention to provide a bolt having two types of threads formed of a first pitch and a second pitch on one thread, The double pitch of the bolt nut which can be easily jointed to one nut in common and can reduce the purchase cost of bolts and nuts by fastening two bolts or nuts to one nut or bolt with two threads. Screws.

In order to achieve the above object, the double pitch screw of the bolt nut is a double pitch screw formed for mutually fastening two bolts and a nut having a first pitch and a second pitch, A first threaded portion having a first pitch formed therebetween for fastening the same threaded bolt and nut to each other; And a second screw portion having a second pitch formed by cutting the first screw portion to fasten another type of bolt and nut to the first screw portion.

Wherein the first threaded portion comprises a first central threaded portion interlocking with a center of a first pitch of the bolt and nut and a first cutting threaded portion cut at both sides of the first central threaded portion to engage a first pitch of the bolt and nut .

Wherein the second threaded portion comprises a second central threaded portion interlocking with a center of a second pitch of the bolt and nut and a second cutting threaded portion cut at both sides of the second central threaded portion to engage a second pitch of the bolt and nut .

The double pitch screw of the bolt nut according to the present invention having the above-described structure is characterized in that the first screw portion having the first pitch formed by the one screw is fastened to the second screw portion having the second pitch, Two kinds of threads made of a first pitch and a second pitch are formed in one thread, so that two kinds of bolts and nuts different from each other can be easily and commonly fastened to one joint. In addition, It is possible to reduce the purchase cost of bolts or nuts by fastening two kinds of bolts or nuts to the nuts or bolts.

1 is a schematic view showing a double pitch screw according to the present invention;
Fig. 2 is a sectional view showing a double pitch screw according to the present invention; Fig.
Fig. 3 is an outline view showing a state of engaging with a first screw according to the present invention; Fig.
Fig. 4 is an outline view showing a state of engaging with a second screw according to the present invention; Fig.
Fig. 5 is a schematic view showing two conventional pitch screws. Fig.
6 is a schematic view showing a conventional two-pitch bolt and nut.

Hereinafter, a double pitch screw of a bolt nut, which is the present invention having the above configuration, will be described.

As shown in FIGS. 1 and 2, a double pitch screw of a bolt nut according to one embodiment of the present invention includes two types of bolts having a first pitch and a second pitch, A first screw portion 10 to which one kind of the same screw is fastened and a second screw portion 20 to which another kind of screw is fastened to the first screw portion 10 with each other.

That is, the first screw portion 10 is formed with a first pitch P1 for fastening one type of the same screw or bolt to each other, and the first pitch P1 of the bolt and the nut is mutually engaged at the center of the first pitch P1. And a first cutting screw part 12 formed on both sides of the first central screw part 11 and adapted to engage with the first pitch 11 of the bolt and nut.

The second screw portion 20 is formed with a second pitch P2 by cutting the first screw portion 10 so as to be fastened to the first screw portion 10 with another type of bolt or nut, And a second central threaded portion 21 formed on both sides of the second central threaded portion 21 so as to be engaged with the second pitch P2 of the bolt and nut, And a second incision screw portion 22 formed so as to be movable.

In FIG. 3, the first screw portion 10 formed with the first pitch P1 is fastened to the screw portion P1 of the bolt or nut having the corresponding first pitch P1.

In FIG. 4, the second threaded portion 20 having the second pitch P2 is mutually fastened to the threaded portion P2 of the threaded bolt and nut corresponding to the second pitch P2.

5 shows a screw having the first pitch P1 and the second pitch P2. The first pitch P1 indicates a thread having a pitch of 22 mm, and the second pitch P2 indicates the second pitch P2. Is 25 mm.

Next, the operation of the double pitch screw of the bolt nut, which is the present invention having the above configuration, will be described.

As shown in FIGS. 1 and 2, the double pitch screw of the bolt nut according to one embodiment of the present invention is different from the first screw portion 10 in which the first pitch P1 is formed so that one type of screw is fastened The second thread portion 20 having the second pitch P2 is formed so that the threads of the first and second types are mutually engaged so that two kinds of threads having the first pitch and the second pitch are formed in one thread, It is possible to jointly fasten the bolts and nuts together in one common use, and it is possible to reduce the purchase cost of bolts and nuts by fastening two kinds of bolts or nuts to one nut or bolt having two threads.

3, the first threaded portion 10 includes a first central threaded portion 11 formed at the center of the first pitch P1 and a threaded portion D1 formed in one kind of bolt and nut, And are mutually engaged with a first cutting screw portion 12 which is cut at both sides of the first central screw portion 11 and is formed to be engaged with the first pitch P1 of the bolt and nut.

As shown in FIG. 4, the second threaded portion 20 includes a first central threaded portion 21 formed at the center of the second pitch P2, and a threaded portion D2 formed in a bolt and a nut of another kind, And a second cutting thread portion 22 formed on both sides of the first central thread portion 21 and adapted to engage with the second pitch P2 of the bolt and the nut so that the first and second pitches So that two different types of bolts and nuts can be jointly and conveniently fastened to one joint.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It should be understood that all of the techniques that can be easily changed and used by those skilled in the art are included in the technical scope of the present invention.

10; A first threaded portion 11; The first central threaded portion
12; The first incision screw
20; A second threaded portion 21; The second central threaded portion
22; The second incision screw
P1; A first pitch P2; Second pitch

Claims

A screw having a double pitch formed for mutual engagement with two types of bolts and nuts each having a first pitch and a second pitch,
A first screw portion (10) having a first pitch (P1) for fastening a bolt and a nut having one type of screw to each other;
And a second threaded portion 20 having a second pitch P2 formed by cutting the first threaded portion 10 to fasten the other threaded bolt and nut to the first threaded portion 10. [ Double pitch screw of bolt nut.

The method according to claim 1,
The first threaded portion 10 includes a first central threaded portion 11 formed to be engaged with a center of the first pitch P1 of the bolt and the nut and a second central threaded portion 11 formed on both sides of the first central threaded portion 11, And a first cutting screw part (12) formed to engage with a first pitch (P1) of the bolt nut.

3. The method according to claim 1 or 2,
The second threaded portion 20 includes a second central threaded portion 21 formed to intermesh with a center of the second pitch P2 of the bolt and nut and a second central threaded portion 21 formed on both sides of the second central threaded portion 21, And a second cutting thread portion (22) engaged with the second pitch (P2) of the bolt nut (22).