KR101700575B1

KR101700575B1 - Circuit breaker

Info

Publication number: KR101700575B1
Application number: KR1020150075243A
Authority: KR
Inventors: 장춘오
Original assignee: 현대중공업 주식회사
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2017-02-01
Also published as: KR20160141158A

Abstract

The present invention relates to a circuit breaker capable of easily fastening a movable contact to a crankshaft of a mechanism, the circuit breaker comprising: a movable contact electrically connected to and in contact with a fixed contact; And a fastening means for fastening the movable contact to the crankshaft. Wherein the connecting means includes a link portion which is engaged with one end of the crankshaft so as to be rotated on the crankshaft, a hinge which connects the other end of the link portion to the movable contactor so as to be rotated and a hinge which is inserted into the movable contactor, And a stopper for preventing the stopper. Wherein the movable contact includes a link inserting portion for inserting and fastening the link portion, a hinge inserting hole formed in a direction perpendicular to the longitudinal direction of the link portion, passing through the link inserting portion and inserted into the hinge, And a stopper insertion hole formed in a direction perpendicular to the hole and communicating with the hinge insertion hole, into which the stopper is inserted. The stopper includes a body inserted into the stopper insertion hole, an elastic portion protruding from one end of the body and having a predetermined gap, and an elastic portion protruding outward from an end of the elastic portion, And a protrusion that is fixed while pressing the hinge. With this configuration, the movable contact can be easily fastened to the crankshaft of the mechanism, and the stopper having the elastic force can be used to support the fastening portion so that the fastening portion is not broken or the fastening is not released even in an instantaneous impact.

Description

Circuit breaker {CIRCUIT BREAKER}

The present invention relates to a circuit breaker, and more particularly, to a circuit breaker capable of easily fastening a movable contact to a crankshaft of a mechanism.

In general, circuit breakers are devices that automatically shut down the circuit to prevent damage from overloading or short circuits in the electrical circuit.

Among these circuit breakers, ACB (air circuit breaker) breaks current by separating the movable contact from the stationary contact when a large current flows due to a fault in the line somewhere, and an arc is generated at this time. Is blown off with compressed air.

This air circuit breaker can actuate the crankshaft to be rotatably fastened to the mechanism so that the movable contact can be brought into contact with or separated from the stationary contactor to energize or short-circuit the circuit.

The movable contact is instantly separated from the stationary contactor by a crankshaft when a problem occurs in the circuit. At this time, a large impact is generated at the joint between the crankshaft and the movable contactor, and the joint is broken or the joint is released.

Korean Patent Registration No. 0911968

It is an object of the present invention to provide a circuit breaker designed to solve the above-mentioned problems, in which a movable contact is easily fastened to a crankshaft of a mechanism, and the fastening is not released even in an instantaneous impact.

In order to achieve the above object, a circuit breaker according to a preferred embodiment of the present invention includes: a movable contact electrically connected to a fixed contact; A crankshaft which is rotatable and moves the movable contactor in contact with or spaced from the stationary contactor; And a fastening means for fastening the movable contact to the crankshaft, wherein the fastening means comprises: a link portion having one end coupled to the crankshaft so as to be rotated; A hinge for connecting the other end of the link portion to the movable contact to be rotated; And a stopper inserted into the movable contact to prevent the hinge from being detached from the movable contact, wherein the movable contact includes: a link inserting portion to which the link portion is inserted and fastened; A hinge insertion hole formed in a direction perpendicular to the longitudinal direction of the link portion and passing through the link insertion portion and into which the hinge is inserted; And a stopper insertion hole formed in a direction perpendicular to the hinge insertion hole and communicating with the hinge insertion hole and into which the stopper is inserted, wherein the stopper includes: a body inserted into the stopper insertion hole; A pair of elastic parts protruding from one end of the body and having a predetermined gap; And a projection protruding outward from the end of the elastic part and being inserted into the hinge insertion hole and being fixed while pressing the hinge.

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The hinge may have a length smaller than the length of the hinge insertion hole and may have a step formed at one end thereof and may be supported by a support formed in the hinge insertion hole.

The stopper insertion hole may be formed to support the other end of the hinge inserted into the hinge insertion hole with the stopper inserted therein.

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The width of the stopper insertion hole is smaller than the maximum width of the stopper. When the stopper is inserted, the protruding portion is pressed inward so that the pair of elastic portions are in close contact with each other. When the protruding portion reaches the hinge insertion hole The protrusion can be inserted into the hinge insertion hole by the elastic force of the elastic portion.

According to the circuit breaker of the present invention, a movable contact can be easily fastened to a crankshaft of a mechanism, and a stopper having an elastic force can be used to support an instantaneous impact such that a fastening portion is broken or a fastening is not released Can be obtained.

1 is a perspective view schematically showing a portion where a movable contact is fastened in a circuit breaker according to an embodiment of the present invention,
FIG. 2 is an exploded perspective view schematically showing a movable contact and a fastening means in a circuit breaker according to an embodiment of the present invention, FIG.
3 is a front view schematically showing a movable contact and a fastening means in a circuit breaker according to an embodiment of the present invention.
4 is a plan view schematically showing a procedure in which a movable contactor is fastened by fastening means in a circuit breaker according to an embodiment of the present invention.

In order to facilitate understanding of the features of the present invention, a circuit breaker according to an embodiment of the present invention will be described in detail below.

It should be noted that, in order to facilitate understanding of the embodiments described below, reference numerals are added to the constituent elements of each of the accompanying drawings, and the same constituent elements are denoted by the same reference symbols whenever possible . In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a portion where a movable contact is fastened in a circuit breaker according to an embodiment of the present invention, and FIGS. 2 and 3 are an exploded perspective view and a front view showing a movable contact and a fastening means in the circuit breaker .

1 to 3, a circuit breaker according to an embodiment of the present invention includes a movable contact 200 electrically connected to a fixed contact (not shown) and electrically connected to the movable contact 200, A crankshaft 110 for moving the contactor 200 in contact with or spaced from the stationary contactor and a coupling means 300 for coupling the movable contactor 200 to the crankshaft 110.

Although not shown in the drawing, the stationary contactor is fixed at a position corresponding to the movable contactor 200 in the circuit breaker, and is brought into contact with and separated from the movable contactor 200 in response to the movement of the movable contactor 200 Energize or short circuit the circuit breaker.

The movable contact 200 includes a main frame 210, a side plate 220 formed of a plate-shaped insulating member coupled to both sides of the main frame 210, And is provided with a fingering 230 contacting the fixed contact.

The main body 210 is provided with a shaft portion 240 which is pivotably connected to the fixed portion 250 fixed to the inside of the circuit breaker so that the movable contactor 200 can rotate about the shaft portion 240 .

A coupling means 300 is coupled to the main frame 210 to receive the power of the crankshaft 110 to rotate the movable contactor 200.

The fastening means 300 includes a link 310 to be coupled to the crankshaft 110 so that one end of the link 310 is rotated and a hinge 360 to fasten the other end of the link 310 to the movable contact 200, And a stopper 330 inserted into the movable contactor 200 to prevent the hinge 320 from falling off the movable contactor 200.

The movable contact 200 includes a link insertion portion 211 to which the link portion 310 is coupled, a hinge insertion hole 212 into which the hinge 320 is inserted, A stopper insertion hole 213 is formed.

More specifically, the link inserting portion 211 is formed at the rear of the main frame 210, and the end of the link portion 310 is inserted into the main frame 210.

The hinge insertion hole 212 is formed in the main frame 210 in a direction perpendicular to the longitudinal direction of the link portion 310 and passes through the link insertion portion 211 and the hinge 320 is inserted do. At this time, the hinge 320 is fastened to the link part 310 inserted in the link insertion part 211 to support the link part 310 to be rotated. At this time, the link portion 310 is formed with a hinge fastening hole 311 through which the hinge 320 is inserted and fastened.

The hinge 320 is shorter than the length of the hinge insertion hole 212 and is formed of a head portion 321, a link coupling portion 322, and a step portion 323.

Therefore, the hinge 320 is formed to have a length smaller than the length of the hinge insertion hole 212 and is completely inserted into the hinge insertion hole 212, and the link portion 310 is inserted into the link fastening portion 322 And the step portion 323 is supported by the support portion 214 formed in the hinge insertion hole 212 so that the step portion 323 does not move further in the insertion direction.

The stopper insertion hole is formed in the main frame 210 in a direction perpendicular to the hinge insertion hole 212 and communicates with the hinge insertion hole 212 and the stopper 330 is inserted.

The stopper 330 includes a body 331 inserted into the stopper insertion hole 213 and a pair of elastic portions 331 protruding from one end of the body 331 and having a predetermined gap g, And a protrusion 333 protruding outward from an end of the elastic portion 332 and inserted into the hinge insertion hole 212. [

More specifically, the width of the stopper insertion hole 213 is greater than the maximum width of the stopper 330, that is, the length from the outer surface of one of the protrusions 333 to the outer surface of the other protrusion 333 When the stopper 330 is inserted into the stopper insertion hole 213, the protrusion 333 is pushed inward so that a pair of the elastic portions 332 are closely fitted to each other, and the protrusion 333 The protruding portion 333 is inserted into the hinge insertion hole 212 by the elastic force of the elastic portion 332. As a result,

The protrusion 333 of the stopper 330 may have a hemispherical shape and may have a diameter at least equal to or greater than a diameter of the hinge insertion hole 212 so as to be fixed to the hinge insertion hole 212 As shown in FIG.

4 is a plan view showing the order in which the movable contacts are fastened by the fastening means in the circuit breaker.

The link portion 310 is inserted into the link inserting portion 211 formed in the main frame 210 of the movable contact 200.

The hinge 320 is inserted into the hinge insertion hole 212 of the main frame 210 and the hinge insertion hole 212 of the main frame 210 passes through the hinge coupling hole 311 of the link portion 310, The step portion 323 of the hinge 320 is supported.

When the stopper 330 is inserted into the stopper insertion hole 213 of the main frame 210, the projecting portion 333 of the stopper 330 is closely inserted into the stopper insertion hole 213, The protrusion 333 is inserted into the hinge insertion hole 212 by the elastic force of the elastic portion 332 and is fixed while pressing the head portion 321 of the hinge 320 .

The movable contactor 200 can be connected to the crankshaft 110 in a simple manner and the movable contactor 200 can be connected to the crankshaft 110 by the instantaneous operation of the movable contactor 200. [ The elastic part 332 is provided on the stopper 330 so that the impact force can be absorbed to some extent and the fastening means 300 can be prevented from being damaged.

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 is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

100: Mechanism 110: Crankshaft
200: movable contactor 210: main frame
211: Link insertion portion 212: Hinge insertion hole
214: Support part 213: Stopper insertion hole
220: side frame 230:
240: shaft portion 250:
300: fastening means 310:
320: Hinge 330: Stopper

Claims

A movable contact electrically connected to the fixed contact;
A crankshaft which is rotatable and moves the movable contactor in contact with or spaced from the stationary contactor; And
Fastening means for fastening the movable contact to the crankshaft;
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The fastening means,
A link portion having one end engaged with the crankshaft so as to be rotated;
A hinge for connecting the other end of the link portion to the movable contact to be rotated; And
A stopper inserted into the movable contact to prevent the hinge from falling off the movable contact;
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The movable contact includes:
A link inserting portion to which the link portion is inserted and fastened;
A hinge insertion hole formed in a direction perpendicular to the longitudinal direction of the link portion and passing through the link insertion portion and into which the hinge is inserted; And
A stopper insertion hole formed in a direction perpendicular to the hinge insertion hole and communicating with the hinge insertion hole and into which the stopper is inserted;
/ RTI >
The stopper
A body inserted into the stopper insertion hole;
A pair of elastic parts protruding from one end of the body and having a predetermined gap; And
A protrusion protruding outward from an end of the elastic part and inserted into the hinge insertion hole, the protrusion being pressed while pressing the hinge;
Circuit breaker.

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The method according to claim 1,
The hinge includes:
Wherein a length of the hinge insertion hole is smaller than a length of the hinge insertion hole, and a step is formed at one end of the hinge insertion hole and is supported by a support formed in the hinge insertion hole.

5. The method of claim 4,
The stopper insertion hole
And the stopper is inserted to support the other end of the hinge inserted into the hinge insertion hole.

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The method according to claim 1,
Wherein a width of the stopper insertion hole is formed to be smaller than a maximum width of the stopper so that when the stopper is inserted, the protrusion is pressed inward so that a pair of the elastic parts are in close contact with each other, and when the protrusion reaches the hinge insertion hole, And the projecting portion is inserted into the hinge insertion hole by a negative elastic force.