KR200437069Y1 - Moving conductor of air circuit breaker - Google Patents

Abstract

The present invention relates to a movable contactor of the air circuit breaker, comprising: a fixed contactor having a fixed contact and connected to a rod-side terminal to draw current; Fingers each formed with a movable contact to selectively contact the fixed contact; An insulating cage in which the finger is housed; A pair of side plates each of which is provided with a rotational opening which is integrally protruded and is integrally supported to support both sides perpendicular to the movement direction of the cage; A load side terminal connected to the finger to draw current; A bracket to which the load-side terminals are coupled and connected to a pivoting hole of the side plate to rotate the cage at an angle; It is configured to include. As a result, the number of parts can be reduced by eliminating the riveting process by the hinge pin in manufacturing the side plate of the movable contactor, and the manufacturing process can be shortened by eliminating the riveting process, thereby reducing the manufacturing cost.

Air circuit breaker, movable contactor, fixed contactor

Description

Movable contactor of lift circuit breaker {MOVING CONDUCTOR OF AIR CIRCUIT BREAKER}

1 is a perspective view showing a side plate manufacturing process of a conventional movable contactor;

Figure 2 is a side view showing the assembled side plate of Figure 1;

3 is a perspective view showing a movable contact of the air circuit breaker of the present invention,

4 is a perspective view of the side plate of FIG.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a cross-sectional view illustrating a side plate assembly process of FIG. 5.

Explanation of symbols on the main parts of the drawings

100: movable contact 110: finger

120: cage 130: side plate

130a: through hole 130b: rotating hole

131: rotational hole 131a: protrusion

131b: drilling 140: load-side terminal

150: bracket

The present invention relates to a movable contactor of the air circuit breaker, and more particularly, it is possible to reduce the load of the input load generated on the mechanism unit by differentiating the joint load for each finger, so that the operation of the air circuit breaker to improve the opening and closing performance of the air circuit breaker It is about contact.

Circuit breakers are generally classified into air circuit breakers, vacuum circuit breakers, and gas circuit breakers according to the medium for extinguishing arcs during opening and closing.

In particular, the air circuit breaker is a circuit breaker that performs the opening and closing performance in the air by using the SOHO chamber. When an accident current (overcurrent, short circuit, ground fault, etc.) is detected, the circuit breaker is excited and the latch that is mechanically held is released. It is a device that trips the open contact and opens the fault current by the force of the internal closing spring.

Looking at the configuration of such a conventional air circuit breaker, a casing for forming a receiving space therein, a plurality of fixed contactors fixedly arranged in the interior of the casing having a fixed contact, formed to be in contact with the fixed contact A plurality of movable contacts arranged to be movable relative to the fixed contactor with a movable contact, a mechanism unit having a plurality of link mechanisms for driving the movable contactor, and a detection unit for detecting overcurrent and accident current, etc. It is made to include.

With this configuration, when an accident current is detected by the detection unit, the movable contactor is rotated to separate the fixed contact point and the movable contact point, and at the same time, an arc is generated from a plurality of fingers pivoting to selectively contact the fixed contact point when the contact point is separated. The bar is cooled and vented to the outside to finally extinguish the arc.

Here, a bracket that serves as a rotating shaft to rotate the movable contact is provided, the bracket is rotatably coupled by a pair of side plates for supporting both sides of the cage for compartmentalizing the plurality of fingers, respectively.

1 and 2, the side plate 13 is formed by riveting the hinge pin 20 provided with the projection 21 to the fixing tool 13a formed through the riveting. There is a problem that the manufacturing cost is increased to increase.

The present invention has been conceived in view of the above problems, and an object thereof is to provide a movable contactor of the air circuit breaker to reduce the parts quantity and manufacturing process.

In order to achieve the above object,

The movable contactor of the air circuit breaker of the present invention includes: a fixed contactor having a fixed contact and connected to a rod-side terminal such that current is drawn in; Fingers each formed with a movable contact to selectively contact the fixed contact; An insulating cage in which the finger is housed; A pair of side plates each of which is provided with a rotational opening which is integrally protruded and is integrally supported to support both sides perpendicular to the movement direction of the cage; A load side terminal connected to the finger to draw current; A bracket to which the load-side terminals are coupled and connected to a pivoting hole of the side plate to rotate the cage at an angle; It is configured to include.

Hereinafter, with reference to the accompanying drawings look at in detail.

Figure 3 is a perspective view showing a movable contact of the air circuit breaker of the present invention, Figure 4 is a perspective view of the side plate of Figure 3, Figure 5 is a cross-sectional view of the AA of Figure 4, Figure 6 shows a side plate assembly process of Figure 5 It is a cross section.

As shown in the drawings, the air circuit breaker of the present invention has a casing (not shown) forming an accommodation space therein, and a plurality of connected to the rod-side terminal so that the current is drawn in and fixedly disposed inside the casing with a fixed contact point. A plurality of movable contacts (not shown), a plurality of movable contacts (100) disposed to be movable relative to the fixed contacts with movable contacts (111b) to be described below so as to contact the fixed contacts, and the movable contacts ( It comprises a mechanism unit (not shown) having a plurality of link mechanisms to drive the 100, and a detection unit (not shown) for detecting overcurrent, accident current and the like.

Inside the casing, a plurality of fixed contactors and movable contactors 100 are arranged to be in contact with and separated from each other, and a plurality of arc-extinguishing chambers arc arcing formed at the fixed contact points and the movable contact points are formed to be separated from each other. Each extinguishing chamber is configured such that one side is opened along the longitudinal direction so that the arc generated at the contact and disconnection of the contact can be exhausted.

Inside the arc chambers, a plurality of grids formed of metal members are arranged in layers along the vertical direction so that the arcs can be arc cooled by inducing and cooling the arc.

The movable contact 100 is divided into a plurality of fingers 110 and the finger 110 to rotate so as to be connected to the rod-side terminal (not shown) of the fixed contact that is selectively contacted with the fixed contact and the current is drawn And an insulating cage 120 having a partition wall 121 formed thereon to accommodate each other, a pair of side plates 130 provided to support both sides perpendicular to a moving direction of the cage 120, and the finger 110. Load side terminal 140 is connected, and the load side terminal 140 is coupled to the side plate 130 is configured to include a bracket 150 to rotate the cage 120 at a predetermined angle.

Each side plate 130 is formed with a plurality of through holes 130a to be bolted to the cage 120, connected to the bracket 150, the rotating holes 131 are provided to rotate at a predetermined angle, respectively Is formed.

Referring to FIG. 6, the pivoting hole 131 of the side plate 130 embosses a portion of the plate-shaped side plate 130 to form the protrusion 131a, and then drills the protrusion 131a. 131b, and the inner diameter of the protrusion 131a is the same in the depth direction.

As such, according to the present invention, the number of parts can be reduced by integrating the side plate into a single piece to replace the hinge pins riveted to the conventional side plate, and the manufacturing process can be shortened by eliminating the riveting process. Savings.

As described above, according to the present invention, the number of parts can be reduced by eliminating the riveting process by the hinge pin in manufacturing the side plate of the movable contactor, and the manufacturing process can be shortened by eliminating the riveting process. The savings are effective.

Claims (2)

A fixed contactor connected to the rod-side terminal and having a fixed contact to draw current; Fingers each formed with a movable contact to selectively contact the fixed contact; An insulating cage in which the finger is housed; A pair of side plates each of which is provided with a rotational opening which is integrally protruded and is integrally supported to support both sides perpendicular to the movement direction of the cage; A load side terminal connected to the finger to draw current; A bracket to which the load-side terminals are coupled and connected to a pivoting hole of the side plate to rotate the cage at an angle; Movable contactor of lifter included. The rotating hole of the side plate of claim 1, And embossing the side plate to form a protrusion, and then drilling the protrusion and forming the inner diameter of the protrusion equally in the depth direction.

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