KR102435045B1 - Mounting structure for trip mechanism in circuit breaker - Google Patents

Abstract

The disclosed trip mechanism part mounting structure of the circuit breaker includes an oil dash port, a trip coil wound on an outer circumferential surface of the oil dash port, and an L" installed in the first and second cases to support the oil dash port on which the trip coil is wound. In the trip mechanism part for a circuit breaker having a yoke in the shape of a ruler, the trip mechanism part is integrally formed to face the inner surfaces of the first and second cases and includes first and second poles provided on the upper side of the oil dash port. It includes a; first and second armature frames to be fixedly installed in the second case.

Description

TRIP MECHANISM IN CIRCUIT BREAKER

The present invention (Disclosure) relates to a trip mechanism part mounting structure of a circuit breaker, and more particularly, to a trip mechanism part mounting structure of a circuit breaker that enables constant installation of the pole position of an oil dash port while compressing a trip coil will be.

Herein, background information related to the present invention is provided, which does not necessarily imply prior art (This section provides background information related to the present disclosure which is not necessarily prior art).

In general, a circuit breaker is a device that protects a circuit by stopping the current when an abnormal current such as an overcurrent or a short-circuit current flows into the circuit, and is used to open and close the normal load of the circuit and cut off the fault current.

A circuit breaker is largely composed of a terminal part connected to the power source side and the load side, a contact part having a fixed contactor and a movable contactor that contacts or separates the circuit to connect or disconnect the circuit, and a moving contactor to provide power necessary for opening and closing the circuit. It includes a trip mechanism for inducing a trip operation of the mechanism by detecting an abnormal current such as an overcurrent or a short-circuit current from the mechanical part and the power supply side, and an extinguishing part for extinguishing an arc generated when the abnormal current is cut off.

On the other hand, as anyone can see, the trip mechanism includes a yoke fixed to the case, an oil dash port fixedly installed on the yoke, a trip coil wound around the outer periphery of the oil dash port, and an armature that is elastically supported on one side of the yoke.

That is, when an abnormal current flows through the trip coil of the trip mechanism, an electromagnetic force is formed in the oil dash port, and the armature is sucked into the armature side of the oil dash port by the electromagnetic force. is disconnected and blocks the current from flowing to the load side.

However, since the trip coil and the oil dash port of the conventional trip mechanism are installed on the yoke by the manual operation of the operator, there is a problem in that the installation position of the pole of the oil dash port is different depending on the skill level of the operator.

In other words, since the oil dash port must be fixed to the yoke while the trip coil is compressed between the yoke and the armature, the work is not only cumbersome, but the installation position of the armature is different according to the skill of the operator, thereby switching between the armature and the armature There was a problem that a difference in pressure occurred.

And due to this problem, even if an abnormal current flows, the movable contact cannot be completely separated from the fixed contact, and there is another problem that leads to a major accident.

Korean Patent Publication No. 10-0483931. Korean Patent Publication No. 10-1750187. Korean Utility Model Publication No. 20-0247020.

The purpose of the present invention (Disclosure) is to provide an installation structure for the trip mechanism of a circuit breaker that allows anyone, even if not a skilled worker, to easily and easily compress the trip coil while always constantly installing the pole position of the oil dash port. .

Herein, a general summary of the present invention is provided, which should not be construed as limiting the scope of the present invention (This section provides a general summary of the disclosure and is not a comprehensive disclosure of its full scope or all of its features).

In order to solve the above problems, according to one aspect of the various aspects describing the present invention, an oil dash port, a trip coil wound around the outer circumferential surface of the oil dash port, and the first and second cases A trip mechanism for a circuit breaker having an "L"-shaped yoke installed and supporting an oil dash port on which a trip coil is wound, wherein the trip mechanism part is integrally formed to face on inner surfaces of the first and second cases and first and second armature frames to be fixedly installed in the first and second cases to the armature provided on the upper side of the oil dash pot.

In the trip mechanism part mounting structure of the circuit breaker according to an aspect of the present invention, the first pole frame is formed to extend horizontally from the inner surface of the first case to the second case side, and the second pole frame is the second pole frame. 2 The first and second guides are formed to extend horizontally from the inner surface of the case to the first case, and the first and second armature frames are supported by fitting one side and the other side of a flange integrally formed under the lower part of the polarizer. Each of the first and second polarizer frames may be formed to extend horizontally from the extended end side to the fixed end side.

In the trip mechanism part mounting structure of the circuit breaker according to an aspect of the present invention, the upper section of the first and second polarizer frames divided up and down by the first and second guides is fitted so that the upper part of the pole is exposed. The lower section of the first and second polarizer frames in which cutting holes are formed to horizontally extend from the extended end side to the fixed end side of the first and second polarizer frames, respectively, and are vertically divided by the first and second guides. A semicircular insertion hole into which the cylinder part of the oil dash port is fitted may be formed at the extended end of the .

In the trip mechanism part mounting structure of the circuit breaker according to an aspect of the present invention, the lower side of the cylinder part of the oil dash port may pass through the yoke.

In the trip mechanism part mounting structure of the circuit breaker according to an aspect of the present invention, the trip mechanism part includes a trip coil pressing spring having a "Z" shape when viewed from the side, which presses the trip coil toward the pole side. However, the trip coil pressure spring is inserted into the cylinder part of the oil dash port to be interposed between the yoke and the lower end of the trip coil, and the trip coil pressure spring has a through hole extending from the top side to the bottom side so that it can be inserted into the cylinder part, , a washer may be interposed between the upper end of the trip coil pressure spring and the lower end of the trip coil.

According to the present invention, since the lower side of the cylinder part of the oil dash pot penetrates the yoke and the poles are fitted and supported in the first and second pole frames, the work time due to the installation of the trip mechanism part can be significantly reduced, and the skill level of the operator is related. It is possible to provide an effect of allowing the armature to be installed in the same position without the need for a pole.

According to the present invention, since the trip coil biasing spring presses the trip coil toward the armature, it is possible to provide an effect of increasing the magnetic flux of the trip coil during the trip operation.

1 is a view showing a state in which a trip mechanism part according to the present invention is attached to a case.
Fig. 2 is a view showing the first armature frame shown in Fig. 1;
3 is an enlarged view of the trip mechanism shown in FIG. 1;

Hereinafter, an embodiment in which the trip mechanism part mounting structure of the circuit breaker according to the present invention is implemented will be described in detail with reference to the drawings.

However, the intrinsic technical idea of the present invention cannot be said to be limited by the embodiments described below, and the following by those skilled in the art based on the intrinsic technical idea of the present invention It is revealed that the embodiment described in the description encompasses a range that can be easily suggested as a method of substitution or change.

In addition, since the terms used below are selected for convenience of explanation, in grasping the intrinsic technical idea of the present invention, they are not limited to the dictionary meaning and are appropriately interpreted as meanings consistent with the technical spirit of the present invention. it should be

Among the accompanying drawings, FIGS. 1 and 3 are views showing a tripping mechanism for a circuit breaker according to the present invention.

1 to 3 , the trip mechanism unit 100 for a circuit breaker according to the present invention includes first and second cases 10a coupled to each other as shown in FIG. 2 via a rivet (not shown) or the like. , 10b) is installed to be built-in.

And the trip mechanism part 100 for a circuit breaker according to the present invention includes an oil dash port 20 and a trip coil 30 wound around the outer peripheral surface of the oil dash port 20 like a conventional trip mechanism part; , and a yoke 40 having an approximately “L” shape that is installed in the first and second cases 10a and 10b to support the oil dash port 20 on which the trip coil 30 is wound.

In addition, the trip mechanism part 100 for a circuit breaker according to the present invention is rotatably installed in the first and second cases 10a and 10b to be spaced apart from the oil dash port 20 by a predetermined distance, like a conventional trip mechanism part. An armature (not shown) pulled toward the armature 22 provided on the upper side of the oil dash port 20 as the trip coil 30 and the oil dash port 20 are magnetized during a trip operation by an abnormal current and , and a return spring (not shown) that provides a restoring force so that the position can be restored after the armature is sucked into the armature 22 .

Here, the connection relationship and operation effect of the oil dash port 20, the trip coil 30, the yoke 40, the armature and the return spring constituting the trip mechanism part 100 for the circuit breaker according to the present invention is a conventional circuit. Since it is the same as the trip mechanism installed in the circuit breaker, a detailed description thereof will be omitted.

On the other hand, the trip mechanism part 100 for a circuit breaker according to the present invention is different from the conventional trip mechanism part, the first and second cases 10a, the pole 22 provided on the upper side of the oil dash port 20; The first and second armature frames 110a and 110b to be fixedly installed in 10b), and a trip coil pressure spring 130 to press the trip coil 30 toward the armature 22 side of the oil dash port 20 ) is further included.

The first and second pole frames (110a, 110b) are the poles 22 at the same position when the trip mechanism part 100 for a circuit breaker according to the present invention is installed in the first and second cases (10a, 10b). Support the armature 22 to be installed.

That is, the first and second armature frames 110a and 110b allow the armature 22 to be installed at the same position regardless of the skill level of the operator.

The first and second pole frames 110a and 110b are integrally formed to face each other on the inner surfaces of the first and second cases 10a and 10b as shown, and the first pole frame 110a ) is formed to extend horizontally from the inner surface of the first case 10a toward the second case 10b, and the second polarizer frame 110b is formed from the inner surface of the second case 10b to the first case 10a ) is formed to extend horizontally to the side.

At this time, one side and the other side of the flange portion 24 integrally formed on the lower portion of the pole 22 are fitted and supported in the first and second pole frames 110a and 110b. For this purpose, the first and second poles The frames 110a and 110b have first and second guides 112a and 112b fitted with one side and the other side of the flange portion 24, respectively, respectively, on the extended end side of the first and second pole frames 110a and 110b. It is formed to extend horizontally toward the fixed end.

And on the upper section 114a, 114b side of the first and second armature frames 110a, 110b divided up and down by the first and second guides 112a and 112b, the upper portion of the pole 22 is exposed. The cut-out holes 116a and 116b to be fitted are formed to horizontally extend from the extended end side of the first and second polarizer frames 110a and 110b to the fixed end side, respectively.

In addition, at the extension ends of the lower sections 118a and 118b of the first and second armature frames 110a and 110b divided up and down by the first and second guides 112a and 112b, an oil dash port 20 is provided. A semicircular insertion hole (120a, 120b) into which the cylinder part 26 of the is fitted is formed.

That is, the polarizer 22, the flange portion 24 integrally formed under the polarizer 22, and the cylinder portion 26 connected to the flange portion 24 face each other and form first and second pairs. It is supported between the first and second cases 10a and 10b by the armature frames 110a and 110b.

On the other hand, the lower side of the cylinder part 26 of the oil dash port 20 passes through the yoke 40 differently from the prior art, and thus, the lower side of the cylinder part 26 of the oil dash port 20 penetrates the yoke 40 and Since the polarizer 22 is fitted and supported in the first and second polarizer frames 110a and 110b, it is possible to significantly reduce the working time due to the installation of the trip mechanism part 100 and install the pole 22 to the same position. let there be

Preferably, the first and second guides 112a, 112b are on the lower surfaces of the upper sections 114a, 114b of the first and second armature frames 110a, 110b and the upper surfaces of the lower sections 118a, 118b. ) while being plastically deformed by the flange portion 24 fitted along the pressing protrusions (not shown) for pressing the flange portion 24 may be integrally formed.

On the other hand, the trip coil urging spring 130 presses the trip coil 30 wound several times toward the armature 22 to increase the magnetic flux of the trip coil 30 during a trip operation by an abnormal current.

The trip coil pressing spring 130 is provided as a leaf spring, and the trip coil pressing spring 130 is provided as a leaf spring having an approximately “Z” shape when viewed from the side.

As described above, the trip coil pressing spring 130 presses the trip coil 30 wound on the outer circumferential surface of the oil dash port 20 toward the armature 22. For this purpose, the trip coil pressing spring 130 is a yoke It is inserted into the cylinder part 26 of the oil dash port 20 to be interposed between the 40 and the lower end of the trip coil 30 .

At this time, the trip coil pressure spring 130 has a through hole 132 extending from the upper end side to the lower end side of the trip coil pressure spring 130 so that it can be fitted into the cylinder part 26 of the oil dash port 20 , , a washer 134 is interposed between the upper end of the trip coil pressure spring 130 and the lower end of the trip coil 30 .

That is, the trip coil pressing spring 130 is interposed between the yoke 40 and the lower end of the trip coil 30 in a compressed state, and by the restoring force of the trip coil pressing spring 130, the trip coil 30 is connected to the polarizer ( 22) is pressed to the side.

Hereinafter, a state in which the trip mechanism part 100 of the circuit breaker according to the present invention formed as described above is installed in the first and second cases 10a and 10b will be briefly described.

In order to install the trip mechanism part 100 of the circuit breaker according to the present invention in the first and second cases 10a and 10b, first, the oil dash port 20 is sequentially connected through the lower end to the trip coil 30, the washer ( 134) and the trip coil pressure spring 130 are inserted.

As described above, when the trip coil 30 , the washer 134 , and the trip coil pressure spring 130 are inserted into the oil dash port 20 , the lower end of the oil dash port 20 penetrates through the yoke 40 . Under the inserted state, one side of the flange portion 24 integrally formed under the pole 22 is installed in the first case 10a.

At this time, one side of the flange portion 24 is fitted to the first guide 112a formed in the first armature frame 110a, whereby one side of the armature 22 and the flange portion 24 are connected to the cylinder portion ( 26) is fitted into the cut-out hole 116a and the insertion hole 120a formed in the first armature frame 110a, respectively.

And at the same time, one side of the yoke 40 is installed in the first case 10a, and at the same time, a terminal part (not shown) constituting a circuit breaker and a fixed contact (not shown) are contacted or separated to connect the circuit. Or a contact part (not shown) having a movable contact (not shown) to separate, an armature and an armature-up return spring, an arc extinguishing unit (not shown) for extinguishing an arc generated when an abnormal current is cut off, and An operating handle (not shown) and the like are installed in the first case 10a.

Here, the one side of the yoke 40, the terminal part, the contact part, the armature and the return spring, the arc extinguishing part and the operation handle are installed in the first case 10a to be connected to each other is the same as that of the conventional circuit breaker, so a detailed description thereof is omit

On the other hand, as described above, when the trip mechanism part 100, the terminal part, the contact part, the armature and the return spring, the arc extinguishing part and the operation handle according to the present invention are installed in the first case 10a, the second case 10b) is covered with the first case 10a and the above-described components are embedded between the first case 10a and the second case 10b.

At this time, the tee side of the flange portion 24 is fitted to the second guide 112b formed in the second armature frame 110b, whereby the other side of the armature 22 and the flange portion 24 and the cylinder portion ( 26) is fitted into the cut-out hole 116b and the insertion hole 120b formed in the second pole frame 110b, respectively.

And when the second case (10b) is covered with the first case (10a), the first and second cases (10a) are coupled using a normal rivet (not shown).

In the trip mechanism part 100 of the circuit breaker according to the present invention formed in this way, the lower side of the cylinder part 26 of the oil dash port 20 penetrates the yoke 40, and the pole 22 is connected to the first and second contacts. Since the pole frame (110a, 110b) is fitted and supported, it is possible to significantly reduce the work time required for the installation of the trip mechanism unit 100, and to install the polarizer 22 at the same position regardless of the skill level of the operator.

In addition, the trip mechanism part 100 of the circuit breaker according to the present invention increases the magnetic flux of the trip coil 30 during the trip operation because the trip coil pressure spring 130 presses the trip coil 30 toward the pole 22 side. make it possible

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present invention, and modified embodiments should be said to belong to the claims of the present invention.

Claims (5)

A circuit having an oil dash port, a trip coil wound on an outer circumferential surface of the oil dash port, and an “L”-shaped yoke installed in first and second cases to support the oil dash port on which the trip coil is wound In the trip mechanism for circuit breaker,
The trip mechanism unit,
First and second polarizer frames that are integrally formed on the inner surfaces of the first and second cases to face each other so that the poles provided on the upper side of the oil dash port are fixed to the first and second cases. ; and
and a trip coil pressing spring having a “Z” shape when viewed from the side, which presses the trip coil toward the armature.
The first armature frame is formed to horizontally extend from the inner surface of the first case toward the second case, and the second polarizer frame horizontally extends from the inner surface of the second case toward the first case. formed to be
In the first and second pole frames, first and second guides having one side and the other side of a flange integrally formed on the lower portion of the polarizer are fitted and supported, respectively, from the extension end side of the first and second pole frames. It is formed to extend horizontally toward the fixed end,
On the lower surface of the upper section and the upper surface of the lower section of the first and second armature frames divided up and down by the first and second guides, the flange portion fitted along the first and second guides Pressing projections for pressing the flange portion while plastically deformed by the integrally formed,
The trip coil pressing spring is fitted to the cylinder part of the oil dash port to be interposed between the yoke and the lower end of the trip coil, and the trip coil pressing spring has a through hole extending from the top side to the bottom side so that it can be fitted into the cylinder part. and a washer interposed between an upper end of the trip coil pressing spring and a lower end of the trip coil.
delete The method according to claim 1,
In the upper section side of the first and second polarizer frames, a cut-out hole into which the upper part of the polarizer is exposed is formed to extend horizontally from the extended end side of the first and second polarizer frames to the fixed end side, respectively,
A tripping mechanism portion of a circuit breaker having a semicircular insertion hole into which the cylinder portion of the oil dash port is fitted is formed at the extension end of the lower section of the first and second armature frames divided up and down by the first and second guides. mounting structure.
The method according to claim 1,
The lower side of the cylinder part of the oil dash port is a trip mechanism part mounting structure of the circuit breaker penetrating the yoke.
delete

Images