JPH09134660A - Moving contact mechanism of electromagnetic contactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items of a moving contact mechanism and a brazing process by forming an arc translocating part by bending both end surfaces of a reinforcing stand in a height lower than a height of moving contacts, and joining them together by a conductive plate by bringing the moving contacts into contact with this arc translocating part. SOLUTION: A reinforcing stand 1 is used as a moving contact plate of an electromagnetic contactor, and an arc translocating part 1A is formed by bending both ends of this reinforcing stand 1. At this time, a height of the arc translocating part 1A is set lower than a height of moving contacts 13a. These are respectively arranged so that side surface of the moving contacts 13a come into contact with this arc translocating part 1A, and a conductive plate 32 is arranged between the moving contacts 13a, and the conductive plate 232 and the moving contacts 13a are respectively joined to the reinforcing stand 1 by brazing, and a moving contact mechanism is manufactured. Therefore, the conductive plate 32 and the moving contacts 13a are placed on the reinforcing stand 1, and the moving contact mechanism can be manufactured by one time brazing, so that cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable contact mechanism of an electromagnetic contactor for turning on / off current supply to a motor or the like.

[0002]

2. Description of the Related Art The structure of a conventional three-phase electromagnetic contactor will be described with reference to FIG. FIG. 8 is a cross-sectional view of the electromagnetic contactor when the structure is easily drawn, and the lower part is
The fixed core 19 around which the coil 20 is wound is fixed to the bottom plate 18a attached to the frame 18, and the movable core 17 and the movable portion support 16 integral with the movable core 17 are provided on the fixed core 19 side via the return spring 21. The moving electromagnet mechanism, the upper part of which is attached to the movable part support 16 and is pressed by the contact spring 14 to the fixed contact 11a joined to the fixed contact plate 11 to which the terminal screw 12 is screwed. It is a contact mechanism section in contact with the movable contact 13a joined to the movable contact plate 13.

FIG. 9 is a diagram for explaining the arc of this contact mechanism portion. The fixed contact 11a on the fixed contact plate 11 and the movable contact 13a on the movable contact plate 13 contact each other as shown in FIG. From the state in which the movable contact plate 13 is moved by the movable part support 16
When V is pushed up in the V direction, an arc 99 is generated between the two contacts, and the movable contact 13a may be consumed or the wax 13r may be melted to drop the movable contact 13a.

FIG. 10 shows an example of a structure that can withstand this arc, U
The movable contact 13a, the conductive plate 32, and the iron piece 33 are attached to the iron frame 31 having a V shape.
Braze. In this structure, the arc generated on the movable contact 13a is commutated to the iron piece 33 to protect the movable contact 13a.

[0005]

In the conventional device shown in FIG. 10 described above, the number of parts is required to be four types, that is, the iron frame 31, the conductive plate 32, the iron piece 33, and the movable contact 13a, and the manufacturing process is as follows. The iron piece 33 is brazed to the iron frame 31 and then inverted to braze the movable contact 13a and the conductive plate 32 2
I needed a process.

An object of the present invention is to provide a structure in which the number of parts of a movable contact plate of an electromagnetic contactor is reduced and the number of brazing steps is reduced.

[0007]

In order to achieve the above-mentioned object, the invention described in claim 1 is a fixed core around which a coil is wound, and a fixed core which is arranged so as to face the fixed core and which is excited by the coil to form a return spring. A movable core that is attracted to the fixed core, and a plurality of movable contact mechanisms that are integrally attached to the movable core and that are joined to the movable contacts that bridge fixed contacts connected to the main circuit. In a movable contact mechanism of an electromagnetic contactor consisting of a movable part support that holds a contact spring that urges the movable contact mechanism, the movable contact mechanism covers the joint part of the contact side surface at both ends of the movable contact mechanism at a position lower than the contact height. It has a reinforcing base integrally formed with an arc commutating portion bent so that the end surface is located, and the side surface is in contact with the arc commutating portion of the reinforcing base, and the contact is arranged between the contact points. Conductor plate as reinforcement plate And characterized by being joined.

Further, in order to achieve the above-mentioned object, claim 2
The invention described in (1) is such that a fixed core around which a coil is wound, a movable core that is arranged so as to face the fixed core and is attracted to the fixed core against the return spring by the excitation of the coil, and the movable core are integrated with the movable core. Electromagnetically connected to the main circuit, a plurality of movable contact mechanisms to which movable contacts bridging fixed contacts are connected, and a movable part support that holds a contact spring for urging the movable contact mechanism. In the movable contact mechanism of the contactor, the movable contact mechanism covers the joint portion of the contact side surface at both ends of the clad material in which the reinforcing metal material and the conductive material are joined, and the end surface is located at a position lower than the contact height. As described above, the movable contact plate has an arc commutation portion formed by bending it toward the conductive material side, and the contact arranged with its side face in contact with the arc commutation portion of the movable contact plate is joined to the movable contact plate. Characterized by That.

Further, in order to achieve the above-mentioned object, claim 3
The invention described in (1) is such that a fixed core around which a coil is wound, a movable core that is arranged so as to face the fixed core and is attracted to the fixed core against the return spring by the excitation of the coil, and the movable core are integrated with the movable core. Electromagnetically connected to the main circuit, a plurality of movable contact mechanisms to which movable contacts bridging fixed contacts are connected, and a movable part support that holds a contact spring for urging the movable contact mechanism. In the movable contact mechanism of the contactor, the movable contact mechanism consists of a boss that is lower than the contact height, with the conductive material side covering the joint part of the contact side surface at both ends of the clad material in which the reinforcing metal material and the conductive material are joined. A movable contact plate having a formed arc commutation portion is provided, and a contact arranged with its side face abutting on the arc commutation portion of the movable contact plate is joined to the movable contact plate.

Further, in order to achieve the above-mentioned object, claim 4
The invention described in (1) is such that a fixed core around which a coil is wound, a movable core that is arranged so as to face the fixed core and is attracted to the fixed core against the return spring by the excitation of the coil, and the movable core are integrated with the movable core. Electromagnetically connected to the main circuit, a plurality of movable contact mechanisms to which movable contacts bridging fixed contacts are connected, and a movable part support that holds a contact spring for urging the movable contact mechanism. In the movable contact mechanism of the contactor, the movable contact mechanism has a strip shape having ears at the four corners at both ends in a developed state, and is bent along its long sides into a U shape and provided at both ends. A reinforcing base having an arc commutation portion formed by bending so as to overlap with each other, and a contact arranged with its side face in contact with the arc commutation portion of the reinforcing base and a conductor arranged between the contacts are joined to the reinforcing base. To become Further, as described in claim 5, the arc commutation portion further has one ear portion at an intermediate portion of the ear portions formed at the four corners of the both ends in the expanded state of the reinforcing base. The ears may be formed by bending, and as described in claim 6, the ears may be provided with holes through which the bonding liquid flows.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The essential point of the present invention is the iron piece 3 of FIG.
This is a structure for transferring the arc commutation function of No. 3 to other parts.

[0012]

【Example】

Embodiment 1 FIG. 1 is a perspective view showing an embodiment of the invention described in claim 1. In the figure, the movable contact plate comprises a reinforcing base 1, and both ends of the reinforcing base 1 are bent to form arc commutation portions 1A, 1A. This arc commutation section 1A,
The height of 1A is set to be lower than the height of the movable contacts 13a, 13a so that the movable contacts 13a, 13a are prevented from coming into contact with fixed contacts (not shown). The side surfaces of the movable contact 13a are arranged so as to contact the arc commutation portions 1A, 1A, and the conducting plate 32 is arranged between the movable contacts 13a, and each is joined to the reinforcing base 1. According to this structure, the movable contact mechanism can be manufactured by placing the conducting plate 32 and the movable contact 13a on the reinforcing base 1 and brazing once. It should be noted that the moving contact mechanism can be manufactured by brazing once even if a conducting plate placed between the movable contacts 13a is used instead of the conducting plate 32.

Embodiment 2 FIG. 2 is a front view of an embodiment of the invention described in claim 2. In this embodiment, a so-called clad material, in which a conductive plate 3 and a reinforcing base 2 made of a reinforcing metal material are integrated, is used as a movable contact plate, and both ends of this clad material are bent toward the conductive plate 3 to form an arc commutation portion 2A. To do. The height of the end surface of the arc commutation portion 2A is set to the movable contacts 13a, 13a.
Of the movable contacts 13a, 13 that are formed to be lower than the height of the
a is joined to the conductive plate 3. According to this structure, the number of parts can be two and can be manufactured with one brazing.

Embodiment 3 FIG. 3 shows an embodiment of the invention described in claim 3. 3 is different from FIG. 2 in that the conductive plate 3 and the reinforcing base 2 are punched by a press into a single clad material, and at the same time, the inside is bossed to form arc commutation portions 2B, 2B. This is advantageous over the embodiment of FIG. 2 where the outer shape is stamped and then the ends are bent. Embodiment 4 FIG. 4 is a sectional view showing an embodiment of the invention described in claim 4, in which a movable contact 13a and a conductive contact 13a are guided to a reinforcing base 8 formed by bending a member punched out and bent as shown in FIG. The plate 32 is brazed. FIG. 5 is a partially plan view and a partially developed view of the reinforcing base 8. The reinforcing base 8 has strip-shaped longitudinal portions with four ears 81 to 84 at both ends, and after bending the dotted line portion in the longitudinal direction. , The ears 81 to 84 are bent along the dotted line, and the ears 81 and 82 and the ears 83 and 84 are overlapped with each other.
The holes 8a provided in Nos. 2 and 83 are used for brazing to form the arc commutation parts 8A and 8A. According to this structure, brazing remains twice, but the number of parts is reduced. In addition,
The arc commutation portion can be formed by spot welding instead of this hole and brazing.

Embodiment 5: FIGS. 6 and 7 show a modification of the embodiment shown in FIGS. 4 and 5, which is Embodiment 4
Is different from the contact stand 9 in that the arc commutation portions 9A and 9A of the contact base 9 are each configured by three ears 91 to 93 and 94 to 96 to increase the arc resistance. , And the holes 9a are handled as described above.

[0016]

According to the invention described in claims 1 to 4,
Since the function which transferred the arc was omitted and this function was transferred to other parts, the number of kinds of parts is changed from the conventional 4 to 4.
With 3 and 2, the others can be changed to 3, and the brazing process can be reduced from two processes to one process, which contributes to cost reduction and facilitates component management. A contact mechanism can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a movable contact mechanism of the invention according to claim 1.

FIG. 2 is a front view of a movable contact mechanism of the invention according to claim 2, which uses a clad material.

FIG. 3 is a sectional view of a movable contact mechanism of the invention according to claim 3, which uses a clad material.

FIG. 4 is a sectional view of the movable contact mechanism of the invention according to claim 4;

5 is a partially plan view and a partially developed view of the reinforcing base 8 of FIG.

FIG. 6 is a sectional view of the movable contact mechanism of the invention according to claim 5;

FIG. 7 is a partially plan view and a partially developed view of the reinforcing base 9 of FIG.

FIG. 8 is a sectional view of the electromagnetic contactor when excited.

[Fig. 9] Arc generation diagram of the contact part

FIG. 10 is a perspective view of a conventional movable contact plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcement base 3 Conductor plate 8 Reinforcement base 13 Moving contact plate 13a Moving contact point 13r Wax 14 Contact spring 16 Moving part support 20 Coil 31 Iron frame 32 Conductor plate 33 Iron piece 99 Arc

Claims (6)

[Claims] 1. A fixed core around which a coil is wound, a movable core which is arranged so as to face the fixed core and which is attracted to the fixed core against the return spring by the excitation of the coil, and is integrally formed with the movable core. Electromagnetic contact consisting of a plurality of movable contact mechanisms attached to each other, which bridge the fixed contacts connected to the main circuit, and a movable portion support holding a contact spring for urging the movable contact mechanisms. In the movable contact mechanism of the reactor, the movable contact mechanism is reinforced with arc commutation parts that cover the joints of the contact side surfaces and are bent so that the end faces are located at a position lower than the contact height at both ends. A movable electromagnetic contactor characterized in that it has a stand, and a contact plate whose side surface is in contact with the arc commutation part of the reinforcement stand and a conductive plate arranged between the contacts are joined to the reinforcement plate. Contact mechanism. 2. A fixed core around which a coil is wound, a movable core which is disposed so as to face the fixed core and which is attracted to the fixed core against the return spring by the excitation of the coil, and is integrally formed with the movable core. Electromagnetic contact consisting of a plurality of movable contact mechanisms attached to each other, which bridge the fixed contacts connected to the main circuit, and a movable portion support holding a contact spring for urging the movable contact mechanisms. In the movable contact mechanism of the container, the movable contact mechanism covers the joint portion on the side surface of the contact at both ends of the clad material in which the reinforcing metal material and the conductive material are joined,
Also, the movable contact plate has an arc commutation portion formed by bending it toward the conductive material so that the end surface is located at a position lower than the contact height, and the side surface of the movable contact plate is in contact with the arc commutation portion of the movable contact plate. A movable contact mechanism of an electromagnetic contactor, characterized in that the contact is joined to a movable contact plate. 3. A fixed core around which a coil is wound, a movable core which is disposed so as to face the fixed core and which is attracted to the fixed core against the return spring by the excitation of the coil, and is integrally formed with the movable core. Electromagnetic contact consisting of a plurality of movable contact mechanisms attached to each other, which bridge the fixed contacts connected to the main circuit, and a movable portion support holding a contact spring for urging the movable contact mechanisms. In the movable contact mechanism of the container, the movable contact mechanism is formed by bosses lower than the contact height with the conductive material side covering the joint part of the contact side surface on both ends of the clad material in which the reinforcing metal material and the conductive material are joined. Of a magnetic contactor having a movable contact plate having an arc commutation part formed by contacting the movable contact plate with its side face abutting the arc commutation part of the movable contact plate. Moving contact mechanism. 4. A fixed core around which a coil is wound, a movable core which is arranged so as to face the fixed core and which is attracted to the fixed core against the return spring by the excitation of the coil, and is integrally formed with the movable core. Electromagnetic contact consisting of a plurality of movable contact mechanisms attached to each other, which bridge the fixed contacts connected to the main circuit, and a movable portion support holding a contact spring for urging the movable contact mechanisms. In the movable contact mechanism of the container, the movable contact mechanism has a strip shape having ears at the four corners at both ends in the unfolded state, and is bent along its long side in a U shape and the ears provided at both ends are A reinforcing base having an arc commutation portion formed by being bent so as to be overlapped is provided, and a contact arranged at a side face of the arc commutation portion of the reinforcing base and a conductor arranged between the contacts are joined to the reinforcing base. Is characterized by Moving contact mechanism of electromagnetic contactor. 5. The movable contact mechanism according to claim 4, wherein the reinforcing base further has one ear portion at an intermediate portion of the ear portions formed at the four corners of both ends in the expanded state, and each ear portion is A movable contact mechanism for an electromagnetic contactor, which is formed by bending an arc commutation portion. 6. The movable contact mechanism for an electromagnetic contactor according to claim 4 or 5, wherein the ear portion forming the arc commutation portion has a hole through which the joining liquid flows. .