JPH076598Y2 - DC operated electromagnetic contactor - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a DC-operated electromagnetic contactor, and in particular, prevents rattling of a movable iron core during sliding in order to maintain a good attractive force of an electromagnet device. Regarding the guide structure.

[Conventional device]

The DC operated electromagnetic contactor adopts a structure to increase the contact area by inclining the contact surfaces of the movable iron core and the fixed iron core in order to generate sufficient attraction force when attracting the movable iron core to the fixed iron core of the electromagnet device. (For example, JP-A-54
-67681). An electromagnet device of this type of DC operated electromagnetic contactor is shown in FIG.

In FIG. 4, 1 is an E-shaped movable iron core, 2 is a movable iron core 1
The fixed cores 3 and 3 facing each other are electromagnetic coils attached to the fixed core 2. The tip of the center leg 11 of the movable iron core 1 is formed to be tapered and has inclined surfaces 11a, 11a, and the legs 12, 12 of the movable iron core 1 are also formed with inclined surfaces 12a, 12a. Corresponding to the inclined surfaces 11a, 12a of the movable iron core 1, both legs 21, 21 of the fixed iron core 2 and the central leg (not shown) are also formed with inclined surfaces 21a, 21a.
A through hole 11b is bored in the central leg 11 of the movable iron core 1 at a substantially central portion, and a guide plate 4 longer than the width of the central leg 11 is press-fitted as shown in FIG. The winding frame 31 of the electromagnetic coil 3 is provided with a guide groove 31a for guiding the guide plate 4. Incidentally, a contactor support in a contact device (not shown) is coupled to the hole 11c of the movable iron core 1, and the movable iron core 1 is sucked and released by the fixed iron core 2 to open and close the contact device.

[Problems to be solved by the device]

The guide of the central leg 11 by the guide plate 4 attached to the central leg 11 of the movable iron core 1 is preferably guided at the tip of the central leg 11, but in the conventional apparatus shown in FIG. 4 and FIG. The plate 4 cannot guide the tip of the central leg 11. That is, since the tip of the central leg 11 is formed in a tapered shape, the through hole 11b into which the guide plate 4 is inserted is naturally located at the central portion of the central leg 11 above the inclined surfaces 11a, 11a. Because it will be. Also, the width of the guide plate 4 cannot be increased,
Therefore, rattling of the movable iron core 1 during sliding cannot be prevented, the centers of the fixed iron core and the movable iron core deviate, an imbalance occurs in the gap of the contact surface, and a loss of suction force occurs. It has drawbacks.

Therefore, an object of the present invention is to eliminate the above-mentioned conventional drawbacks, to enable the guide plate to be attached to the tip of the central leg, and to make the sliding guide surface of the guide plate large so that there is no play during sliding of the movable core. Another object of the present invention is to provide a direct current operated electromagnetic contactor capable of preventing sticking.

[Means for Solving the Problems]

According to the present invention, there is provided a movable iron core which is formed by laminating E-shaped thin plates and has a tip of a central leg tapered to have an inclined magnetic pole surface, and which is formed by laminating E-shaped thin plates. A fixed iron core having an inclined magnetic pole surface facing each other, an electromagnet device composed of an electromagnetic coil attached to the fixed iron core, a contact support connected to the movable iron core, and a movable contact held by the contact support. A direct-current-operated electromagnetic contactor comprising a movable contactor and a contact device composed of a fixed contact disposed so as to face the movable contactor, wherein a groove parallel to the inclined surface is provided at the tip of the center leg of the movable core. A guide plate is provided in which a square hole is provided on a side surface where both ends of the groove of the central leg are located, and a guide plate is formed of a U-shaped thin plate in which the width of both leg pieces is larger than the width of the central leg of the fixed iron core. Guide to the coil frame A guide groove provided in, is achieved by placing press-fitting the ends of the legs piece of the guide plate to the square hole is inserted the guide plate into the groove of the central leg of the fixed iron core.

[Action]

In the present invention, the U-shaped guide plate is inserted into the groove provided at the tip of the center leg of the movable iron core, and the ends of the U-shaped leg pieces are press-fitted into the square holes of the center leg. The part is located from the tip of the central leg to the approximate center of the central leg. As a result, when the movable iron core slides, the tip of the center leg of the movable iron core is guided by the guide plate, so that the center deviation between the fixed iron core and the movable iron core can be reduced.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a DC operated electromagnetic contactor showing an embodiment of the present invention. The same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 1, reference numeral 40 denotes an electromagnet device housed in a case 41, and 50 denotes a contact device covered by a cover 51.
The contact device 50 is connected to the movable core 1 and slides along with the movable core 1, a contact support 52, a movable contact 53 held by the contact support 52 and having a movable contact 54, and a fixed member facing the movable contact 54. It consists of a fixed contactor 56 having a contact 55. A guide plate 5, which will be described later, is attached to the movable iron core 1 of the electromagnet device 40. Reference numeral 60 is a return spring for the movable iron core 1, and 70 is a rivet for caulking the movable iron core and the fixed iron core formed by laminating thin plates. The operation of this DC operated electromagnetic contactor is well known and will not be described.

Next, FIG. 2 is an exploded perspective view of the electromagnet device 40. A groove 101 is provided at the tip of the center leg 11 of the movable iron core 1 parallel to the inclined surface 11a, and both ends of the groove 101 are provided in the center leg 11. A square hole 102 is provided on the side surface where is located. The guide plate 5 is formed in a U shape as shown in FIG. 3, and the leg portions 51, 51 are provided with claws 51a, 51a at the ends thereof. In FIG. 3, the guide plate 5 is attached to the central leg 11 by inclining inwardly by pushing both leg pieces 51, 51 of the guide plate 5 in the direction of arrow A, but since it is straight when attached. , Both legs 5 of the guide plate 5
The guide plate 5 is pushed into the central leg 11 so that the central leg 11 is sandwiched by 1,51 and the guide plate 5 is engaged with the groove 101. At this time, the claws 51a, 51a of both leg pieces 51, 51 of the guide plate 5 face the square hole 102 of the central leg 11, and the both claws 51a, 51a are pushed by pushing the leg pieces 51, 51 in the direction of arrow A shown in FIG. Are pressed into the square holes 102. As a result, the guide plate 5 is deformed as shown in FIG. 3, and the guide plate 5 is held by the central leg 11.

[Effect of device]

According to the present invention, the U-shaped guide plate is engaged with the groove provided at the tip of the central leg of the movable iron core, and both leg pieces of the guide plate are press-fitted and held in the square holes of the central leg. Since the guide part of the movable iron core can be located at the tip of the center leg and the sliding area of the guide plate can be increased, it is possible to reduce the misalignment between the center of the fixed iron core and the movable iron core. It is possible to prevent rattling of the iron core. In addition, since there is no loss in the suction force that can eliminate the imbalance of the air gap on the contact surface, there is an effect that the operation of the electromagnetic contactor is stabilized.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional view of a direct current operated electromagnetic contactor, FIG. 2 is an exploded perspective view of an electromagnet device, and FIG. Sectional view, part 4
FIG. 5 and FIG. 5 each show a conventional device, FIG. 4 is an exploded perspective view of an electromagnet device, and FIG. 5 is a cross-sectional view of a main part of the electromagnet device. 1: Movable iron core, 2: Fixed iron core, 3: Electromagnetic coil, 5: Guide plate,
40: electromagnet device, 50: contact device, 101: groove, 102: square hole.

Claims (1)

[Scope of utility model registration request] 1. A movable iron core which is formed by laminating E-shaped thin plates and has a tip of a central leg which is tapered and has an inclined magnetic pole surface, and which is formed by laminating E-shaped thin plates facing each other. A fixed iron core having an inclined magnetic pole surface, an electromagnet device including an electromagnetic coil attached to the fixed iron core, a contactor support connected to the movable iron core, and a movable contactor having a movable contact held by the contactor support, In a direct current operated electromagnetic contactor equipped with a contact device composed of a fixed contact arranged so as to face the movable contact, a groove parallel to the inclined surface is provided at the tip of the center leg of the movable iron core, and A square hole is provided on the side surface where both ends of the groove are located, and a guide plate, which is made of a U-shaped thin plate and whose width of both leg pieces is larger than the width of the central leg of the fixed iron core, is provided to the coil frame of the electromagnetic coil. Set the guide groove of the guide plate DC-operated electromagnetic contactor, characterized in that disposed by press-fitting the ends of the legs piece of the guide plate to the square hole is inserted the guide plate into the groove of the central leg of the fixed iron core.