JPH07105815A - Electromagnetic contact apparatus - Google Patents

Abstract

PURPOSE:To provide an electromagnetic contact apparatus in which collision noise generated at the time when iron cores collide against each other can be lowered and the lives of the iron cores can be prolonged by installing a specified collision absorbing part in a coil frame. CONSTITUTION:In a housing 1 of an electromagnetic contacting apparatus, it has a fixed iron core 4 formed into an E-shape, a movable iron core 5 which is formed into an E-shape, set on the opposite to the fixed iron core 4 and can be brought into contact with or parted from the fixed iron core freely, a coil frame 6 idly fitted in a leg 9 at the center of the fixed iron core 4, a supporting body 7 to be hung on a body 2 in the condition it is reinforced by a spring in the direction in which the movable iron core 5 is parted from the fixed iron core 4, and a movable frame 8 to which a movable contactor 23 is attached and which is driven by the supporting body 7, wherein the movable contactor has a movable contact point 23a which is set on the opposite to the fixed contact point and can be brought into contact with or parted from the fixed contact point. A collision absorbing part 18 with which a part of the supporting body 7 is brought into contact before the movable iron core 5 is attracted toward the fixed iron core 4 and brought into contact with the fixed iron core 4 is installed in the coil frame 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor which opens and closes contacts by exciting a coil.

[0002]

2. Description of the Related Art In this type of electromagnetic contactor, a movable contact is driven by a support body suspended from a body in a state where a movable iron core is biased by a spring in a direction away from a fixed iron core. By connecting the movable frame, the movable contact of the movable contact is brought into contact with and separated from the fixed contact.

These fixed iron core and movable iron core are each formed into an approximately E shape with three leg pieces and connecting pieces, and the coil of the coil frame disposed between the fixed iron core and the movable iron core is By being excited, the movable iron core leg piece is attracted to the fixed iron core leg piece.

[0004]

However, in the above-mentioned electromagnetic contactor, when the coil is excited, the leg piece of the movable iron core directly collides with the leg piece of the fixed iron core. Was great. For this reason, there have been problems that the collision noise generated when the iron cores collide with each other is loud and the life of the iron cores is shortened.

The present invention has been made in view of the above circumstances. An object of the present invention is to reduce the collision noise generated when iron cores collide with each other and to easily extend the life of the iron cores. To provide a contactor.

[0006]

In order to solve the above problems, the electromagnetic contactor according to claim 1 forms a housing with a body and a cover, and within this housing, three leg pieces and these A fixed iron core formed in a substantially E-shape by a connecting piece that connects the leg pieces to each other, and a substantially E-shaped shape by the three leg pieces and the connecting piece facing the leg piece of the fixed iron core so as to freely come into contact with and separate from the leg piece. -Shaped movable iron core, a coil frame having a coil that is loosely fitted to the center leg of the fixed iron core, and the body with the movable iron core spring-biased in a direction away from the fixed iron core. An electromagnetic contactor, comprising: a support suspended from a fixed contact; and a movable frame driven by the support with a movable contact having a movable contact facing the fixed contact so that the fixed contact can be separated from the coil frame. In addition, before the movable iron core is attracted to the fixed iron core and the movable iron core contacts the fixed iron core, a part of the support is It has a configuration in which a collision buffer portion in contact.

According to a second aspect of the electromagnetic contactor of the present invention, in the collision buffer section of the first aspect, the movable iron core is in a state in which the movable iron core is in contact with the fixed iron core after a part of the support body is in contact. It is configured to be inclined so as to be displaced.

[0008]

According to the structure of claim 1, when the movable iron core is attracted to the fixed iron core, a part of the support body collides with the collision buffer portion to weaken the collision force, and The leg piece collides with the fixed iron core leg piece.

According to the structure of claim 2, when the movable iron core is attracted to the fixed iron core, a part of the support collides with the collision buffer portion and then slides like an ant hell to move the movable iron core. The leg pieces of the machine shift when they are in contact with the fixed iron leg pieces.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. That is, the housing 1 of this electromagnetic contactor is formed by a box-shaped body 2 having a bottom plate and four side plates having an opening on one surface, and a cover 3 that closes the opening of the body 2. Body 2 is upper body 2a
It is divided into a lower body 2b and a lower body 2b, and accommodates a fixed iron core 4, a movable iron core 5, a coil frame 6, and a support 7 which constitute an electromagnet device. In addition, the cover 3 houses a movable frame 8 connected to the support 7.

The fixed iron core 4 is formed into a substantially E shape by laminating a plurality of silicon steel plates and connecting the three leg pieces 9,9,9 and a connecting piece 10 connecting these leg pieces 9,9,9. Has been formed. The fixed iron core 4 is arranged with the connecting piece 10 fitted to the bottom of the body 2.

Like the fixed iron core 4, the movable iron core 5 is formed by laminating a plurality of silicon steel plates, and three leg pieces 11 facing the respective leg pieces 9, 9, 9 of the fixed iron core 4 in a freely attachable / detachable manner. , 11, 11 and a connecting piece 12 connecting these leg pieces 11, 11, 11 are formed in a substantially E shape. The movable iron core 5 is arranged in a state of being spring-biased in a direction away from the fixed iron core 4 by being connected to the support 7 by a pin 13.

The coil frame 6 is formed in a spool shape from an insulating material such as plastic. The coil frame 6 includes a winding portion 15 around which the coil 14 is wound, and collar portions 16 and 16 arranged so as to sandwich the winding portion 15. In FIG. 1, the upper flange 16 has a terminal block 17 for input and output diagonally, and one end and the other end of the coil 14 are connected thereto. Further, as shown in FIGS. 1 and 3, the collar portion 16 is provided with a support 7 before the movable iron core 5 is attracted to the fixed iron core 4 and the movable iron core 5 contacts the fixed iron core 4. A collision buffer portion 18 with which a part abuts is provided, and the coil 14 is excited to move the movable iron core.
The impact noise when the 5 collides with the fixed iron core 4 is reduced, and the life of the movable iron core 5 and the fixed iron core 4 is extended. The collision buffer 18 is formed in an inclined shape that inclines outward of the coil frame 6, and after a part of the support 7 abuts, the movable iron core 5 is in contact with the fixed iron core 4 and the movable iron core 5 is in contact therewith. It is possible for 5 to shift.

The support 7 is formed of an insulating material such as plastic in an inverted concave shape, and connects the movable iron core 5 with a pin 14. The support 7 has a connecting portion 19 for connecting the movable frame 8 on the upper surface thereof, and also has shaft holes 20 for connecting the movable iron core 5 through which the pins 13 penetrate, on both sides. Further, a return spring 21 suspended from the upper body 2a is attached to substantially the center of the support body 7, and supports the movable iron core 5 in a state in which the movable iron core 5 is biased in a direction away from the fixed iron core 4. There is.

The movable frame 8 is made of an insulating material such as plastic, and is accommodated in the cover 3 in a state of being connected to the connecting portion 19 of the support 7, as shown in FIG. The movable frame 8 is equipped with a movable contact 23 having a movable contact 23a facing the fixed contact 22a of the fixed contact 22 arranged in the cover 3 so as to freely come into contact with and separate from the fixed contact 22a. The movable contact 23 is formed in a wing shape and has movable contacts 23a on both sides thereof. The movable contactor 23 has a center fixed by a contact pressure spring 24.
It is attached to the movable frame 8 in a state of being biased by a spring in the 22 direction, and a contact pressure is applied while the movable contact 23a is in contact with the fixed contact 22a.

According to this embodiment, the movable iron core 5 is attracted to the fixed iron core 4 and the movable iron core 5 is fixed to the coil frame 6 by the fixed iron core 5.
Collision buffer part where a part of the support 7 abuts before contacting 4
Since the movable iron core 5 is attracted to the fixed iron core 4 because part 18 of the support 7 collides with the collision buffer 18 to weaken the collision force, the leg pieces of the movable iron core 5 are provided. 11, 11, 11 are fixed iron cores 4
Since it collides with the leg pieces 9, 9, 9 of, the collision noise generated when the iron cores 4, 5 collide with each other can be reduced and the iron core 4,
5 It is easy to extend the life.

Further, since the collision buffering portion 18 is formed in an inclined shape so that the movable iron core 5 is displaced in a state where the movable iron core 5 is in contact with the fixed iron core 4 after a part of the support 7 is in contact therewith. , When the movable iron core 5 is attracted to the fixed iron core 4, a part of the support 7 collides with the collision buffer portion 18 and then slides like an ant hell, and the leg pieces 11, 11 of the movable iron core 5, The movable contact 23a moves toward the fixed contact 22a because the contact 11 disengages while contacting the leg pieces 9, 9, 9 of the fixed iron core 4.
The contact reliability is improved by the wiping that is displaced after the contact with.

According to the present embodiment, the collision buffer portion is formed in an inclined shape, but the collision buffer portion is formed of an elastic material and is supported before the movable iron core contacts the fixed iron core. It suffices that the colliding force with which the movable iron core collides with the fixed iron core is weakened due to the contact of a part of the portion. Further, the collision buffering portion is not limited to one piece, and may be a plurality of pieces as long as it is formed at a position where a part of the supporting portion abuts and the movable iron core is displaced in the same direction.

[0019]

According to the electromagnetic contactor of the first aspect, when the movable iron core is attracted to the fixed iron core, a part of the support body collides with the collision buffering portion to weaken the collision force, Since the leg pieces of the movable iron core collide with the leg pieces of the fixed iron core, the collision noise generated when the iron cores collide with each other can be reduced and the life of the iron cores can be easily extended.

According to the electromagnetic contactor of the second aspect, when the movable iron core is attracted to the fixed iron core, a part of the support body collides with the collision buffer portion and then slides like an ant hell to move. As the iron core leg slips in contact with the fixed iron core leg,
In addition to the effect of the first aspect, the contact reliability is improved by wiping the movable contact after it comes in contact with the fixed contact.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of that of FIG.

FIG. 3 is an exploded perspective view showing the electromagnet device of FIG. 1.

[Explanation of symbols]

 1 Housing 2 Body 3 Cover 4 Fixed iron core 5 Movable iron core 6 Coil frame 7 Support 8 Movable frame 9 Fixed iron core leg piece 10 Fixed iron core connection piece 11 Movable iron core leg piece 12 Movable iron core connection Single side 14 Coil 18 Collision buffer 22 Moving contact 22a Moving contact 23a Fixed contact

Claims (2)

[Claims] 1. A fixed iron core formed in a housing by a body and a cover, and in the housing, three leg pieces and a substantially E-shaped connecting piece connecting the leg pieces with each other. , A movable iron core formed in a substantially E-shape by three leg pieces and a connecting piece that come into contact with and separate from the leg piece of the fixed iron core, and is loosely fitted to the central leg piece of the fixed iron core. A coil frame with a coil, a support suspended on the body with the movable iron core spring biased in a direction away from the fixed iron core, and a movable contact facing the fixed contact freely In a magnetic contactor housing a movable frame mounted with a movable contact that is driven by a support, a movable iron core is attracted to a fixed iron core and the movable iron core contacts the fixed iron core in the coil frame. An electromagnetic contactor, characterized in that a collision buffering portion with which a part of the support abuts is provided before the contact. 2. The collision buffering portion is formed in an inclined shape so that the movable iron core shifts in a state in which the movable iron core is in contact with the fixed iron core after a part of the support body is in contact. The electromagnetic contactor according to claim 1.