KR101640820B1 - Vacuum circuit breaker - Google Patents

Abstract

The present invention relates to a screw tap structure of a fixing screw for mechanically fixing a vacuum interrupter to an electric power tool, and more particularly, to a vacuum interrupter having a movable electrode and a fixed electrode. A female screw formed on at least one of the movable electrode and the fixed electrode; And a fastening member for fastening the vacuum interrupter to the electric power machine, wherein the female threaded portion is composed of at least two female threads having different diameters from each other. Thereby, even if the assembly dimensions of the fastening bolts are different for each model and manufacturer of the vacuum interrupter, it is not necessary to change the shape of the electrodes, etc.

Description

{VACUUM CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker, and more particularly, to a screw tap structure of a fixing screw for mechanically fixing a vacuum interrupter to an electric power tool.

The vacuum interrupter is a core part of the main circuit part applied to power devices such as circuit breaker, switchgear and switchgear which use vacuum as the arc furnace medium.

As an example of the power device, the vacuum circuit breaker may be used for blocking the main circuit portion of a high-voltage (high-voltage) breaker of several kilovolts and for blocking the main circuit portion of an ultra-high-voltage (ultra-high voltage) circuit breaker of several tens to several hundreds of kilovolts.

1 is a schematic view showing the construction of a vacuum circuit breaker according to the related art. The vacuum circuit breaker may be composed of a cradle 1, a main circuit part 2, and a moving carriage 3.

The main circuit unit 2 is movably supported by the moving carriage 3 and can be moved to the operation position or the test position in the cradle 1 of the main circuit unit 2. [

The terminal 4 provided in the main circuit part 2 is connected to the terminal provided in the cradle 1 so that the main circuit part 2 can be turned on to supply power from the outside to the load side.

1, the terminal 4 of the main circuit part 2 is spaced apart from the terminal of the cradle 1, so that the main circuit part 2 is turned off and the external power supply can be cut off.

However, the operation of the vacuum interrupter at the test position is possible.

FIG. 2 is a cross-sectional view showing in detail the internal structure of the main circuit unit in FIG. 1, FIG. 3 is an enlarged view showing an enlarged view of the vacuum interrupter 20 in FIG. 2, Fig. 3 is an enlarged view showing a screw tab structure. Fig.

2 to 4, the main circuit unit 2 may be constituted by a vacuum interrupter 20, an operation unit, and a terminal.

The movable electrode 21 mounted in the vacuum interrupter 20 is driven by the operation unit 30 and is movable up and down.

For example, the movable electrode 21 is moved to the fixed electrode 22 to energize the contacts, or the movable electrode 21 is separated from the fixed electrode 22, so that the contact 23 is separated.

The terminal may be composed of a fixed terminal 26a connected to the fixed electrode 22 and a movable terminal 26b connected to the movable electrode 21.

The fixed terminal 26a and the movable terminal 26b can connect the electrodes 21 and 22 to the external terminals when the main circuit unit 2 moves to the operating position.

2 to 4, a female screw 24 is formed at one end of the fixed electrode 22 and at one end of the movable electrode 21, and a fastening bolt 25 So that the vacuum interrupter 20 can be fixed to the housing 27 of the main circuit unit 2.

However, the vacuum interrupter 20 of the main circuit unit 2 according to the related art has the following problems.

The conventional internal electrode and the female thread 24 formed on the movable electrode 21 have only one kind of standard such as the inner diameter. However, as the power device to which the vacuum interrupter 20 is applied is expanded, The sizes and specifications of the fastening bolts 25 for assembling the vacuum interrupter 20 may differ from manufacturer to manufacturer depending on the power device to which the fastening bolt 25 is applied, A design change has been made to correct the problem.

As the type of the vacuum interrupter 20 increases, the number of the fastening bolts 25 for each size for assembling the vacuum interrupter 20 also increases. Therefore, the shape of the fastening bolt 25 is changed according to the size of the fastening bolt 25, It is troublesome to manage the interrupter 20.

SUMMARY OF THE INVENTION Accordingly, it is a general object of the present invention to provide a vacuum interrupter which can be applied immediately without changing the electrode shape even if the size of the fastening bolt varies depending on the type and manufacturer of the vacuum interrupter.

According to an aspect of the present invention, there is provided a vacuum interrupter including a vacuum interrupter, a female screw, and a fastening member.

The vacuum interrupter may include a movable electrode and a fixed electrode.

The female threaded portion may be formed on at least one of the movable electrode and the fixed electrode.

The fastening member is a kind of fastening screw, and includes a male screw portion that is fastened to the female screw portion, so that the vacuum interrupter can be fixed to the electric power tool.

Here, the female threaded portion may be composed of at least two female thread portions having different diameters from each other.

In one aspect of the present invention, when the vacuum interrupter is assembled to a power device, two or more types of internal thread portions formed at the ends of the electrodes are selectively used, so that the assembly can be performed without changing the shape of the electrodes.

In one embodiment, the female screw portion includes a first female screw portion formed concavely at one end of the movable electrode or the fixed electrode; And a second female screw portion formed deeper from the first female screw portion to the other end of the movable electrode or the fixed electrode.

Thereby, the screwing tab can be embodied in the movable electrode and the fixed electrode.

In one embodiment, the second female threaded portion may be formed smaller in diameter than the first female threaded portion.

In one embodiment, the first female screw portion and the second female screw portion may be formed in two stages.

In one embodiment, the first female screw portion and the second female screw portion may be formed concentrically with each other.

In one embodiment, the power device includes: a housing having the vacuum interrupter built therein and having a screw support; And a terminal which is inserted between the screw supporter and the electrode and the other end protrudes to the outside of the vacuum interrupter so that current is passed through the vacuum interrupter, wherein one end of the fastening member is fixed to the screw support, And the other end can be simultaneously inserted into one end of the terminal and the electrode.

Accordingly, the power device may be a vacuum breaker, and a vacuum interrupter may be fastened to the vacuum breaker.

In one embodiment, at least one of the coupling members is coupled to the fixed electrode and the fixed terminal, and at least one of the coupling members is coupled to a shunt connecting one of the movable electrode and the movable terminal to the movable electrode, And may be a connecting rod connecting the movable electrode and the insulating rod.

According to another aspect of the present invention, there is provided a vacuum interrupter including a vacuum interrupter, a female thread, and a fastening member, wherein the vacuum interrupter further includes a common adapter.

The vacuum interrupter may include a movable electrode and a fixed electrode.

The female threaded portion may be formed on at least one of the movable electrode and the fixed electrode.

Here, the common adapter may have a protrusion on one side thereof and may be fastened to the female threaded portion, and the female threaded groove may be provided on the other side.

The fastening member is provided with a male screw portion which is fastened to the female screw groove of the common adapter, so that the vacuum interrupter can be fixed to the electric power tool.

According to another aspect of the present invention, the vacuum interrupter can be assembled immediately without changing the shape of the vacuum interrupter electrode by selectively using the female thread portion formed on the electrode and the female thread groove formed on the common adapter.

Also, the common adapter can be used selectively.

For example, when the screw diameter of the fastening member is equal to the diameter of the internal thread of the electrode, a common adapter is not required, and when the diameter of the fastening member is larger than the diameter of the internal thread of the electrode, a common adapter can be used.

The common adapter can be commonly used for the movable electrode and the fixed electrode.

If the common adapter is used, the existing movable electrode and the fixed electrode can be used as they are.

Thus, the machining cost can be reduced.

In one embodiment, the female screw groove of the common adapter may be composed of at least one female screw groove having a different diameter from each other.

In one embodiment, the female screw groove includes a first female screw groove formed at one end of the movable electrode or the fixed electrode; And a second female screw groove formed deeper from the first female screw groove to the other end of the movable electrode or the fixed electrode.

As a result, the female thread groove (screwing tab) is doubly triple-folded, so that even if the width of the fastening member is widened, it can be adequately covered.

In an embodiment, the second female screw groove may have a smaller diameter than the first female screw groove.

Thus, the female screw groove (tab) can be implemented in triplicate.

As described above, according to the vacuum circuit breaker of the present invention, even if the assembling dimensions of the fastening bolts are different for each model and manufacturer of the vacuum interrupter, it is not necessary to change the shape of the electrodes.

In addition, it is possible to expand the applicability of different assembly screws for each maker, thereby contributing to market expansion of the vacuum interrupter.

1 is a schematic view showing the construction of a vacuum circuit breaker according to the prior art.
2 is a cross-sectional view showing in detail the internal structure of the main circuit unit in FIG.
3 is an enlarged view showing an enlarged view of the vacuum interrupter in FIG.
4 is an enlarged view of the screw tab structure of the fixed electrode in FIG.
5 is a cross-sectional view showing a main circuit part of a vacuum circuit breaker according to the present invention.
6 is a sectional view showing a vacuum interrupter according to the first embodiment of the present invention.
FIG. 7 is a cross-sectional view showing an enlarged view of the female screw portion of the fixed electrode in FIG. 6. FIG.
8 is a cross-sectional view showing a state in which a common adapter is applied according to a second embodiment of the present invention.
FIG. 9 is an exploded view showing a state in which the common adapter is disassembled from the fixed electrode of FIG. 8. FIG.
10 is a sectional view showing a state in which two female screw grooves of the common adapter are formed in FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

6 is a cross-sectional view illustrating a vacuum interrupter according to a first embodiment of the present invention. FIG. 7 is a cross-sectional view illustrating a vacuum interrupter according to an embodiment of the present invention. Fig.

The present invention relates to a vacuum interrupter that can be applied without changing the shape of an electrode of a vacuum interrupter (120) in spite of an assembly dimensional deviation of a fastening bolt for fixing a vacuum interrupter (120) to an electric power tool.

The power device to which the vacuum interrupter 120 of the present invention is applied may be a vacuum breaker.

The vacuum circuit breaker may include a cradle (see No. 1 in FIG. 1), a main circuit portion 100, and a moving carriage (see No. 3 in FIG. 1).

The cradle (see No. 1 in FIG. 1) forms an enclosure of the vacuum circuit breaker to protect the internal components from external impacts.

In addition, terminals are provided behind the cradle (refer to No. 1 in FIG. 1), so that a power supply line for supplying external power and a load side power line to be a power supply source can be connected, respectively.

The moving carriage (see No. 3 in FIG. 1) may serve as a conveying means for drawing and inserting the main circuit unit 100.

The main circuit unit 100 according to the first embodiment of the present invention may include a housing 110, a vacuum interrupter 120, and fastening means.

The housing 110 may be formed in a box shape with an external skeleton of the main circuit unit 100.

A support 113 for fixing the vacuum interrupter 120 may be provided in the housing 110.

The support 113 may be vertically spaced inside the housing 110.

For example, one of the supports 113 may be horizontally protruded on the inner upper end of the housing 110.

The other one 113b of the support 113 may be formed to protrude horizontally in the middle of the housing 110.

The vacuum interrupter 120 may be fastened to the supporter 113 by fastening means and supported vertically.

The vacuum interrupter 120 may include a vacuum container 130, a fixed electrode 121, and a movable electrode 122.

A seal cup is provided at an upper end portion and a lower end portion of the vacuum container 130 to maintain airtightness in mechanical strength and vacuum state.

At this time, the fixed-side yarn cup may be positioned at the upper end of the vacuum container 130, and the movable-side yarn cup may be positioned at the lower end of the vacuum container 130.

The vacuum container 130 may be made of a ceramic material, and may be connected between the stationary side and the movable side, so as to ensure insulation performance inside the container.

The fixed electrode 121 may be fixed on the upper side of the vacuum container 130 and the movable electrode 122 may be disposed on the lower side of the vacuum container 130.

The fixed electrode 121 and the movable electrode 122 can conduct a rated current with an electric conductor.

A fixed contact 125 may be provided at a lower end of the fixed electrode 121 and a movable contact 126 may be provided at an upper end of the movable electrode 122.

The stationary contact 125 and the movable contact 126 may be vertically spaced apart or may be disposed in contact with each other.

The movable contact 126 can be moved up and down together with the movement of the movable electrode 122.

When the movable contact 126 rises, the current contacts the fixed contact 125 and the current flows. When the movable contact 126 falls, the current can be blocked by the fixed contact 125.

The movable contact 126 is spaced apart from the fixed contact 125 when an abnormal current such as an overcurrent is generated, thereby blocking the abnormal current.

In order to prevent diffusion of the metal vapor generated when the abnormal current is interrupted, a contact shield 127 may be provided adjacent to the contact of the electrode.

One of the contact shields 127 may be located on the fixed electrode 121 and the other of the contact shields 127 may be located on the movable electrode 122.

The contact shield 127 is disposed adjacent to the contacts of the electrodes so that the metal vapor generated at the fixed contacts 125 is prevented from diffusing upward when the movable contacts 126 are separated from the fixed contacts 125 It is possible to prevent the metal vapor generated at the movable contact 126 from diffusing downward.

A center shield 128 may be provided on the inner wall surface of the vacuum chamber 130 so as to cover an area of a predetermined section.

The outer surface of the center shield 128 is symmetric with respect to the longitudinal center line of the vacuum container 130 and is disposed adjacent to the inner wall surface of the vacuum container 130 and is connected to the vacuum container 130 by the shield fixing member 129 Can be fixed.

A bellows 131 is provided in the movable electrode 122 to allow linear movement of the movable part while maintaining a vacuum inside the vacuum interrupter 120.

The upper end of the bellows 131 is connected to the movable electrode 122 via the bellows shield 132 and the lower end of the bellows 131 is connected to the lower end of the vacuum vessel 130.

The bellows shield 132 may extend radially from the movable electrode 122 to cover the upper end of the bellows 131 to protect the bellows 131 from the metal melt generated when the current is interrupted.

The technical idea of the present invention is to provide the movable electrode 122 and the fixed electrode 121 with at least two internal threaded portions 123 having diameters different from each other so that the vacuum interrupter 120, Depending on the type of the fastening bolt, the shape of the electrode can be positively responded without changing the shape of the electrode.

The vacuum interrupter 120 may be assembled by fixing the fixed electrode 121 protruding from the upper side of the vacuum container 130 and the movable electrode 122 protruding from the lower side of the vacuum container 130 to the housing 110 have.

The fixed electrode 121 may be fixed to the upper support 113a of the housing 110. [

The movable electrode 122 may be movably supported by a lower support 113b of the housing 110. [

The fixed electrode 121 may include a female screw 123 formed in a concave shape from the upper end toward the lower end.

The female threaded portion 123 includes a first female threaded portion 123a formed at an upper end thereof concave in the lower end direction and a second female threaded portion 123b having a smaller diameter at the first female threaded portion 123a Lt; / RTI >

The first female threaded portion 123a and the second female threaded portion 123b may have different types of female threads having different diameters.

The first female threaded portion 123a and the second female threaded portion 123b may be formed on the upper side and the lower side of the fixed electrode 121 independently of each other.

The first female threaded portion 123a may be formed in the axial direction over a predetermined interval in a downward direction while maintaining a constant diameter from the upper end of the fixed electrode 121. [

The second female threaded portion 123b may be formed axially within the fixed electrode 121 for a predetermined period so as not to overlap with the first female threaded portion 123a.

The second female threaded portion 123b may be formed to have a relatively small diameter continuously from the lower end of the first female threaded portion 123a or be spaced from the lower end of the first female threaded portion 123a.

The first female screw portion 123a and the second female screw portion 123b may be formed in two stages so as to be stepped with respect to each other.

The fastening member 114 such as a fastening bolt can be fastened to the female threaded portion 123 formed in the two stages.

The fastening member 114 may include a head portion 114a and a male thread portion 114b extending in one direction from the head portion 114a.

The diameter of the first female threaded portion 123a and the second female threaded portion 123b may correspond to the diameter of the fastening member 114.

The male threaded portion 114b of the fastening member 114 can be selectively inserted into the first female threaded portion 123a and the second female threaded portion 123b.

For example, when the fastening member 114 is a right-hand thread M10 (having a diameter of 10 mm), the fastening member 114 can be inserted into the second female threaded portion 123b, 12 mm), it can be inserted into the first female screw portion 123a.

When the male screw portion 114b of the fastening member 114 is selectively inserted into the first female screw portion 123a and the second female screw portion 123b, the head portion 114a of the fastening member 114 is inserted into the housing 110 can be tightly fixed to the recess groove formed in the upper support base 113a.

One end of the fixed terminal 111 is inserted between the upper end of the fixed electrode 121 and the upper support 113a of the housing 110 and the other end of the fixed terminal 111 is connected to the outer side of the housing 110 As shown in Fig.

The terminal includes a fixed terminal 111 whose one end is connected to the fixed electrode 121 of the vacuum interrupter 120 and a movable terminal 112 whose one end is connected to the connection rod 133 of the vacuum interrupter 120 .

The other end of the fixed terminal 111 may be inserted between the upper support 113a of the housing 110 and the fixed electrode 121 and directly connected to the fixed electrode 111. In this case, And may be applied to the fixed electrode 121 of the interrupter 120.

The male threaded portion 114b of the fastening member 114 passes through the upper support 113a of the housing 110 and the fixed terminal 111 and passes through the first female threaded portion 123a formed at the upper end of the fixed electrode 121, 2 female screw portion 123b.

Since the fastening bolt is M12 and the diameter of the female threaded portion 123 formed on the upper end of the fixed electrode 121 is 10 mm, it is impossible to insert the fastening bolt. Therefore, It was necessary to carry out a correction operation to enlarge the diameter.

However, in the present invention, even if the size of the fastening member 114 for fixing the vacuum interrupter 120 is increased in assembling the vacuum interrupter 120, any one of the first internal thread portion 123a and the second internal thread portion 123b, The vacuum interrupter 120 can be assembled without modification of the electrode shape by using the first female screw portion 123a of M12 size.

In addition, the design change does not require a design change even when the model of the vacuum interrupter 120 is increased, and the applicability of different assembling screws can be increased to contribute to the market expansion of the vacuum interrupter 120 .

The first female threaded portion 123a and the second female threaded portion 123b may be similarly applied to the movable electrode 122.

The first internal thread 123a may be formed to extend from the lower end of the movable electrode 122 to the upper end thereof over a predetermined interval.

The second female threaded portion 123b may be formed deeper inside the upper end of the first female threaded portion 123a so as not to overlap with the first female threaded portion 123a.

At this time, the second female threaded portion 123b may be continuously formed in the first female threaded portion 123a with a small diameter or spaced apart from the first female threaded portion 123a.

However, in the case of the movable electrode 122, the connecting rod 133 may be selectively fastened to the first and second internal threaded portions 123a and 123b instead of the fastening bolt.

The connecting rod 133 connects the movable electrode 122 and the insulating rod 134 to move the movable electrode 122 in the vertical direction and is movable through the lower side support 113b of the housing 110 Can be supported.

The movable terminal 112 is coupled to the connection rod 133 and can be moved up and down in conjunction with the connection rod 133.

A shunt 135 may be connected between the movable electrode 122 and the movable terminal 112.

One end of the shunt 135 is connected to the lower end of the movable electrode 122 and the other end of the shunt 135 is connected to the movable terminal 112.

The connecting rod 133 may have a male thread 133a protruding from the upper end thereof.

The male threaded portion 133a of the connecting rod 133 may be selectively fastened to the first female threaded portion 123a and the second female threaded portion 123b through the hook formed at the upper end of the shunt 135. [

In the vacuum circuit breaker of the present invention, when the main circuit unit 100 is moved to the operating position and the terminal of the vacuum interrupter 120 is connected to the terminal of the cradle, the current path is as follows.

When an external power source is supplied to the power source side terminal of the cradle, a current is applied from the power source side terminal to the fixed electrode 121 of the vacuum interrupter 120 via the fixed terminal 111.

A current applied to the fixed electrode 121 flows to the movable electrode 122 in contact with the fixed electrode 121 and is applied to the movable terminal 112 via the movable electrode 122 from the movable electrode 122. [

Then, the applied current can be supplied to the load side through the load side terminal of the cradle connected to the movable terminal 112. [

8 is a cross-sectional view showing a state in which a common adapter is applied according to a second embodiment of the present invention, and FIG. 9 is an exploded view showing a state in which a common adapter is disassembled from the fixed electrode in FIG.

The main circuit unit 100 according to the second embodiment of the present invention includes a vacuum interrupter 120, a housing 110 and fastening means, and as a fastening means for assembling the vacuum interrupter 120 to the housing 110, A common electrode 224 is interposed between the fixed electrode 121 and the coupling member 114 so that the fixed electrode 121 and the coupling member 114 are coupled to each other. May be additionally provided.

The fixed electrode 121 is not provided with two or more kinds of internally threaded portions 123 having different diameters in the fixed electrode 121 as in the first embodiment, (123) may be provided.

The common adapter 224 may be formed in a manner such that the female screw portion 223 of the fixed electrode 121 and the male screw portion 114b of the fastening member 114 have different diameters, It can serve as a bridge connecting the male screw portion 114 of the fastening member 114 and the male screw portion 114b of the fastening member 114. [

To this end, the shape of the common adapter 224 may be similar to a fastening bolt or a screw.

However, the common adapter 224 may employ a female screw groove 225 in place of the cross groove (or groove groove) formed in the head portion of the fastening bolt.

The diameter difference between the female threaded portion 123 of the fixed electrode 121 and the male threaded portion 114b of the fastening member 114 can be overcome by using the female thread groove 225.

The common adapter 224 may be composed of a head portion 224a and a projection portion 224b.

The head portion 224a may be provided with a female screw groove.

The female screw groove 225 may include a first female screw groove 225a and a second female screw groove 225b different from the diameter of the female screw 123 of the fixed electrode 121. [

The diameter of the female screw groove 225 may be larger than the diameter of the female screw 123.

The diameter of the female thread groove 225 is formed to correspond to the diameter of the male screw portion 114b of the fastening member 114 or to be slightly smaller so as to enable the fastening member 114 to be inserted therethrough. The male screw portion 114b of the fastening member 114 can be fastened.

The projecting portion 224b of the common adapter 224 may be formed so that its diameter corresponds to the diameter of the female threaded portion 123 of the fixed electrode 121,

Here, the common adapter 224 may be selectively used depending on the size of the fastening member 114.

For example, if the size of the fastening member 114, that is, the diameter of the threaded portion 114b of the fastening member 114 is equal to the diameter of the female threaded portion 223 of the fixed electrode 121, 114 can be fixed to the fixed electrode 121 to fix the vacuum interrupter 120.

When the size of the fastening member 114, that is, the diameter of the male screw portion 114b of the fastening member 114 is larger than the diameter of the female screw portion 223 of the fixed electrode 121, the size of the fastening member 114 It is possible to fix the vacuum interrupter 120 by adopting the matching common adapter 224.

The common adapter 224 may be provided separately from the fixed electrode 121 depending on the size and type of the fastening member 114.

Although the common adapter 224 has been described only with respect to the fixed electrode 121, it is applicable to the movable electrode 122 as well.

Unlike the movable electrode 122 of the first embodiment, the movable electrode 122 according to the second embodiment can also be formed with one type of female threaded portion 223 having a constant diameter on the movable electrode 122.

A common adapter 224 is selectively used between the female threaded portion 123 of the movable electrode 122 and the male threaded portion 114b of the fastening means so that the difference in diameters thereof can be overcome by the common adapter 224 .

Unlike the fastening member 114 of the fixed electrode 121 as the fastening means in the case of the movable electrode 122, the female screw portion 123 of the movable electrode 122 is provided with a male screw portion So that the connecting portion 133a can be fastened.

10 is a sectional view showing a state in which two female screw grooves of the common adapter are formed in FIG.

The common adapter 224 may have at least two types of female thread grooves.

The female screw grooves 225a and 22b may be formed in two stages.

The diameter of the female thread grooves 225a and 22b formed in two stages may be larger than the diameter of the female threaded portion 123 of the electrode.

The use of the common adapter 224 has the following effects.

The common adapter 224 is manufactured separately from the fixed electrode 121 and the movable electrode 122 and is much easier to process because it is much smaller than the volume or size of the fixed electrode 121 and the movable electrode 122 .

Also, since the common adapter 224 is commonly used for the fixed electrode 121 and the movable electrode 122, it is convenient to manage.

In addition, when the common adapter 224 is used, the fixed electrode 121 and the movable electrode 122 of the first and second embodiments have the same diameter as that of the conventional fixed electrode and the movable electrode, Since the conventional fixed electrode and the movable electrode can be used as they are, the machining cost due to the design change can be reduced.

Therefore, according to the present invention, the screw fixing tabs (in the first embodiment, the first internal thread portion 123a and the second internal thread portion 123b) are provided at the ends of the fixed electrode 121 and the movable electrode 122, A screw is fastened to one of the tabs for fastening the double screw when assembling the vacuum interrupter 120 to a power device (for example, a vacuum circuit breaker), so that screws (not shown) are prepared for each model and manufacturer of the vacuum interrupter 120 Even if there is a variation in the size and assembly deviation of the fastening member 114, the design change is unnecessary, and the applicability of other assembling screws can be increased to contribute to expanding the market of the vacuum interrupter 120.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Modified forms are also included within the scope of the present invention.

100: main circuit portion
110: Housing
111: stationary terminal
112: Operation Terminal
113: Support
113a:
113b: Lower support
114: fastening member
114a: head portion
114b:
120: Vacuum interrupter
121: fixed electrode
122: movable electrode
123: Female threads
123a: first female thread portion
123b: second female thread portion
125: Fixed contact
126: movable contact
127: Contact shield
128: Center shield
129: shield fixing member
130: housing
131: Bellows
132: Bellows shield
133: Connection Load
133a:
134: Insulation rod
135: Shunt

Claims (10)

A vacuum interrupter provided with a movable electrode and a fixed electrode;
A female screw formed on at least one of the movable electrode and the fixed electrode;
A fastening member having a male screw portion to be fastened to the female screw portion, the fastening member fixing the vacuum interrupter to an electric power tool;
Lt; / RTI >
Wherein the female threaded portion is composed of at least two female threads with different diameter from each other. The method according to claim 1,
The female screw portion includes a first female screw portion formed at one end of the movable electrode or the fixed electrode; And
A second female screw portion formed in the first female screw portion so as to be deeper in a direction approaching the contact point of the movable electrode or the fixed electrode;
And a vacuum circuit breaker. 3. The method of claim 2,
Wherein the second female threaded portion has a smaller diameter than the first female threaded portion. 3. The method of claim 2,
Wherein the first female screw portion and the second female screw portion are formed in two stages. 3. The method of claim 2,
Wherein the first female threaded portion and the second female threaded portion are formed concentrically with each other. The method according to claim 1,
The power device includes:
A housing having the vacuum interrupter built therein and having a screw support;
A terminal which is inserted between the screw supporter and the electrode and whose other end protrudes to the outside of the vacuum interrupter and which energizes the vacuum interrupter;
/ RTI >
Wherein one end of the fastening member is fixed to the screw support and the other end of the fastening member is inserted into one end of the terminal and the electrode at the same time. The method according to claim 6,
Wherein at least one of the fastening members is coupled to the fixed electrode and the fixed terminal,
Wherein at least one of the coupling members is connected to a shunt connecting one of the movable electrode and the movable terminal to the movable electrode, and the connection rod connecting the movable electrode and the insulation rod. delete delete delete

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