KR101086492B1

KR101086492B1 - Arc quenching part of relay

Info

Publication number: KR101086492B1
Application number: KR1020100100890A
Authority: KR
Inventors: 최연순
Original assignee: 엘에스산전 주식회사
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-11-25

Abstract

The present invention relates to an arc extinguishing unit for extinguishing arc discharge in a relay which is employed in an electric vehicle or the like to open and close electric power. The arc extinguishing portion of the relay accommodates the fixed contact and the movable contact and extinguishes the arc discharge generated when the movable contact is separated from the contact with the fixed contact, and includes a capping cap, a plate, and a junction. Lo caps support the fixed contacts, and engaging grooves are formed continuously along the bottom surface. The plate forms an arc extinguishing space for accommodating the fixed contact and the movable contact between the cap and the cap, and the engaging projection is continuously formed on the upper surface to be fitted into the engaging groove. The joining portion is formed so as to seal the cap and the plate in a sealed state while the joining protrusion is fitted into the joining groove.

Description

Arc quenching part of relay

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc extinguishing unit for extinguishing arc discharge in relays which are used for electric vehicles and the like to open and close power.

Relays are installed between a battery and a power converter in a hybrid car, a fuel cell car, a golf cart, an electric forklift, and the like to supply or cut power from the battery to the power converter. Perform the function.

The relay includes a fixed contact, a movable contact in contact with or separated from the fixed contact, and an actuator for driving the movable contact. Fixed contacts and movable contacts are housed in the arc extinguishing section. The arc extinguishing portion is formed by combining a ceramic cap on a metal plate, and is sealed after the extinguishing gas is filled in the arc extinguishing space therein, thereby extinguishing the arc discharge generated when the movable contact is driven.

On the other hand, the metal joint member is joined to the end of the ceramic cap, and the metal joint member is welded to the metal plate by welding so that the ceramic cap is joined while maintaining hermeticity to the metal plate. At this time, a welding jig is used to fix the ceramic cap at the correct position.

However, as described above, after the metal joint member is provided to join the ceramic cap and the metal plate, one side of the metal joint member must be bonded to the ceramic cap, and the other side of the metal joint member must be welded to the metal plate. There is a complicated aspect.

Further, in the process of fixing the ceramic cap to the correct position and then fixing it with the welding jig, the position of the ceramic cap may be misaligned because the metal joint member is placed on the flat surface of the metal plate. As a result, a defect may occur in which the metal plate is coupled with the ceramic cap misaligned. In addition, when a welding defect occurs between the metal joint member and the metal plate, there may be a problem that the arc extinguishing gas leaks through the defect site.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to provide an arc arcing part of a relay that can easily join a ceramic cap and a metal plate and can also improve sealing performance.

Arc arc extinguishing portion of the relay according to the present invention for achieving the above object is to extinguish the arc discharge generated when receiving the fixed contact and the movable contact and the movable contact is separated from the contact with the fixed contact, A support cap for supporting a fixed contact and having a coupling groove formed continuously along a bottom surface thereof; A plate formed with an arc extinguishing space for accommodating the fixed contact and the movable contact between the cap and the cap; And a joining portion formed to join the cap and the plate in a state where the joining protrusion is fitted into the joining groove.

According to the present invention, the cap and the plate may be joined in a state in which the cap and the plate are fitted, without a separate joint member to connect the cap and the plate, unlike the conventional art. Thus, not only the sealing performance between the arc cap and the plate can be improved, but also the joining process can be easy and simplified. In addition, since the cap can be engaged with the plate at the correct position, no positional deviation can occur between the fixed contact and the movable contact.

1 is a cross-sectional view of an example of a relay employing an arc extinguishing unit according to an embodiment of the present invention.
2 and 3 are perspective views for explaining a process of bonding between the cap and the plate of Figure 1;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of an example of a relay employing an arc extinguishing unit according to an embodiment of the present invention. 2 and 3 are perspective views for explaining a process of bonding between the cap and the plate of FIG.

1 to 3, a relay is employed in an electric vehicle or the like to open and close electric power, and includes a fixed contact 10, a movable contact 20, and an actuator 30.

The movable contact 20 is in contact or separated with respect to the fixed contact 10. The movable contact 20 may be provided in a number corresponding to the number of the fixed contacts 10, and may be disposed to face the fixed contacts 10, respectively.

The actuator 30 drives the movable contact 20 to contact or disconnect the fixed contact 10. For example, the actuator 30 may include a coil assembly 31, a cylinder 32, a fixed core 33, a movable core 34, a shaft 35, and a return spring 36. .

The coil assembly 31 has a coil 31a which generates a magnetic force when supplying current. The coil 31a may be wound around the bobbin 31b. The cylinder 32 is installed through the center of the coil assembly 31. The fixed core 33 is received and fixed inside the cylinder 32. The movable core 34 is housed inside the cylinder 32. The movable core 34 is operative to move close to or away from the stationary core 33 while slidingly moving along the inner wall of the cylinder 32.

The shaft 35 is arranged to be slidably movable along the inner wall of the fixing core 33 through the fixing core 33. The shaft 35 has one end coupled to the movable core 34 to be movable together with the movable core 34, and the other end is connected to the movable contact 20. The shaft 35 penetrates through the central area of the movable contact 20 and can be coupled to the movable contact 20 so as to be relatively movable. A contact spring 37 may be installed between the shaft 35 and the movable contact 20.

The contact spring 37 exerts an elastic force in a direction to close the movable contact 20 to the fixed contact 10, so that when the movable contact 20 is in contact with the fixed contact 10, a pressure equal to or greater than the fixed contact 10 is fixed. To maintain contact. The contact spring 37 may be composed of a compression coil spring.

The return spring 36 is installed between the movable core 34 and the fixed core 33. The return spring 36 exerts an elastic force on the movable core 34 in a direction that separates the movable core 34 from the fixed core 33. The return spring 36 may consist of a compression coil spring.

In such an actuator 30, when a current is supplied to the coil 31a, a magnetic force is generated around the coil 31a. Then, as the movable core 34 moves closer to the fixed core 33, the shaft 35 moves together with the movable core 34 in the same direction, so that the movable contact 20 moves to the fixed contact 10. Contact is energized. When the current supplied to the coil 31a is cut off, the movable core 34 returns to its original position by the elastic force of the return spring 36, and the shaft 35 returns together with the movable core 34, thereby operating The contact 20 is separated from the fixed contact 10 and is not energized.

An arc discharge can occur when the movable contact 20 is disconnected from the contact with the fixed contact 10 in the relay. The relay includes an arc extinguishing unit 100 in accordance with one embodiment of the present invention to extinguish the arc discharge.

The arc extinguishing unit 100 includes a extinguishing cap 110, a plate 120, and a joint 130. The extinguishing cap 110 supports the fixed contact 10. Here, the fixed terminal 10 may be connected to the fixed terminal 11, the fixed terminal 11 is connected to the fixed terminal 10 at one end and the SO cap in the form protruding to the outside through the SO cap 110. It may be fixed to (110).

The extinguishing cap 110 forms an arc extinguishing space 101 for accommodating the fixed contact 10 and the movable contact 20 between the plate 120. That is, the arc cap 110 may have a structure having an inner space and one side is opened. Here, the plate 120 is coupled to the capping cap 110 so as to block the opening portion of the cap cap 110, thereby forming an arc extinguishing space 101 between the cap cap 110. The cap 102 may be formed of an insulating ceramic material. And, the cap cap 110 is formed with the coupling groove 111 is continuous along the bottom surface.

The plate 120 forms an arc extinguishing space 101 with the extinguishing cap 110. The plate 120 may support the actuator 30, and may be made of a metal material having rigidity to increase the supporting effect. In the plate 120, a vent for filling the arc extinguishing gas into the arc extinguishing space 101 may be formed. In this case, the vent may be provided with a pipe for filling, and the pipe may be sealed after the extinguishing gas is filled into the arc extinguishing space 101. In addition, the plate 120 has a coupling protrusion 121 continuously formed to be coupled to the coupling groove 111 on the upper surface.

As shown in FIG. 3, the bonding portion 130 is formed to bond the SOHO cap 110 and the plate 120 in a sealed state in a state where the coupling protrusion 121 is fitted into the coupling groove 111. As described above, when the cap cap 110 and the plate 120 are coupled to each other by the fitting coupling of the coupling protrusion 121 to the coupling groove 111, the coupling area may be increased as compared with a simple surface contact. Therefore, there can be an effect that the sealing performance and the bond strength is improved.

In addition, as shown in Figures 2 and 3, in the process of fitting the coupling protrusion 121 in the coupling groove 111 can be assembled while the alignment is made naturally between the cap 110 and the plate 120. In this state, since the arc cap 110 and the plate 120 can be bonded and fixed by the bonding portion 130, the positional deviation between the fixed contact 10 and the movable contact 20 does not occur. In addition, since the SOHO cap 110 and the plate 120 may be joined in a fitted state without a separate joint member, the joining process may be easy and simplified.

On the other hand, the junction portion 130 is formed by applying the adhesive over the SOHO cap 110 and the plate 120 along the lower periphery of the SOHO cap 110, and then hardened, between the SOHO cap 110 and the plate 120. Can be bonded while maintaining airtightness. Here, epoxy may be used as the adhesive.

As another example, the junction 130 may be formed by brazing a brazing material across the bottom cap 110 and the plate 120 around the bottom of the bottom cap 110. In addition, although not shown, the bonding portion may be formed by being cured after being coated with an adhesive between the coupling groove 111 and the coupling protrusion 121. In addition, the bonding between the SOHO cap 110 and the plate 120 may be variously made.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10 .. Fixed contact 20. Movable contact
30. Actuator 31a. Coil
33 .. fixed core 34. movable core
36. Return spring 100. Arc arc
Arc Soho Space 110 Soho Cap
111. Engagement groove 120. Plate
121. Engagement protrusion 130. Junction

Claims

Accommodating the fixed contact and the movable contact and dissipating the arc discharge generated when the movable contact is separated from the contact with the fixed contact,
A cap for supporting the fixed contact and having a coupling groove continuously formed along a lower surface thereof;
A plate formed with an arc extinguishing space for accommodating the fixed contact and the movable contact between the cap and the cap; And
Arc arc extinguishing portion of the relay including a junction formed to seal the coupling between the cap and the plate in a state in which the engaging projection is fitted into the coupling groove.

The method of claim 1,
The junction portion,
The arc extinguishing portion of the relay, characterized in that it is formed by applying an adhesive over the cap and the plate along the lower periphery of the cap and then cured or by brazing with a brazing material.

The method of claim 1,
The junction portion,
The arc extinguishing portion of the relay, characterized in that formed after the coating is cured with an adhesive between the coupling groove and the engaging projection.

4. The method according to any one of claims 1 to 3,
The cap is formed of a ceramic material,
The arc arc extinguishing portion of the relay, characterized in that the plate is formed of a metallic material.