JPH0729474A - Electromagnetic contactor - Google Patents

Abstract

PURPOSE:To prevent the shaking and slippage of each part in the course of the integration of an electromagnet mechanism part. CONSTITUTION:Insert holes 7F, 7F are formed in two leg parts 7A, 7A provided on the upper surface of a spool 7 to nip a fixed iron core. Two leg pieces 6B, 6B are formed on the diagonal of the lower surface of an insulating plate 6. The leg pieces 6B, 6B of the insulating plate 6 are pressed and fixed into the insert holes 7F, 7F of the spool 7, whereby the fixed iron core integrated between the insulating plate 6 and the spool 7 is kept in the state where it is mounted on the spool 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor used for opening and closing a motor load or the like.

[0002]

2. Description of the Related Art FIG. 5 shows an application filed by the applicant (Japanese Patent Application No. 3-
No. 246319), which is a sectional view of an electromagnetic contactor showing a conventional device, FIG. 6 is a sectional view taken along the line AA of FIG. 7, FIG. 7 is a sectional view taken along the line R of FIG. 5, and FIG. 8 is an exploded perspective view of an electromagnet mechanism portion. 9 and 10 are exploded perspective views of the contact opening / closing mechanism section.

First, components constituting the electromagnet mechanism will be described with reference to FIG. An insulating plate 6 is attached to the two ribs 1A provided inside the upper case 1, and has two convex portions 6A at the attachment points. The fixed iron core 8 has an E-shape having three legs, and the central leg 8A has a leaf spring 18 for assembling.
Fit in. An electromagnetic coil 21 is wound around the spool 7 and has a hollow portion 7E in the vertical direction at the center, and two leg portions 7 are provided on the upper surface.
A is provided, and two legs 7B and two columns 7 are provided on the lower surface.
C is provided, and each of the columns 7C is provided with a column hole 7D. The movable iron core 9 also has the same shape as the fixed iron core 8 and has a central leg 9A. The guide fitting 11 is attached to the movable iron core 9 and has a function as a guide and a fulcrum for the seesaw movement of the lever 13.

Next, parts constituting the contact opening / closing mechanism will be described with reference to FIG. Two main movable contact windows 5A and one auxiliary movable contact window 5B formed by projecting from the contact support member 5 are provided in the upper part of the contact support member 5, and a connection hole with the lever 13 is provided in the lower part. 5D is provided. Here, when the auxiliary movable contact 20 is incorporated in the auxiliary movable contact window 5B, first, the auxiliary movable contact 20 is moved to the auxiliary movable contact window 5B.
The spring receiving member 19A is inserted into the bottom of the spring receiving member 19A. Then, the opening size of the auxiliary movable contact window 5B and the spring receiving member 19A are inserted.
Due to the shape and size of A, the spring bearing 19A is inserted at an angle. In order to facilitate the insertion, a fitting groove 5C is provided by cutting one corner of the auxiliary movable contact window 5B. After inserting the spring bearing 19A, the coil spring 10A is fitted between the ceiling surface of the auxiliary movable contact window 5B and the upper surface of the spring bearing 19A. The main movable contact 4, the spring receiving member 19, and the coil spring 10 housed in the main movable contact window 5A (see FIGS. 5 and 6).
Since the reference) has almost the same structure, its description is omitted.

Next, the order of assembling the electromagnetic contactor will be described. First, the center leg 9A of the movable iron core 9 is inserted from below the hollow portion 7E of the spool 7 of the electromagnet mechanism, and the movable iron core 9 is provided on the lower surface of the spool 7. The two legs 7B are clamped. Next, a guide metal fitting 11 is provided on the lower part of the movable iron core 9.
Are sandwiched and are connected by the guide pin 12. Then, the round pin 14 is inserted into the through hole 13C at the other end of the lever 13 and is connected to the guide fitting 11, and the central portion of the lever 13 is used as the strut holes 7D of the two strut 7C provided on the lower surface of the spool 7. The torsion spring 17 is connected by a fulcrum pin 15 penetrating the round hole 17A. Then, place the upper case 1 upside down to set the rib 1
The insulating plate 6 is attached to A, the fixed iron core 8 is placed thereon, and the leaf spring 18 is fitted into the central leg 8A of the fixed iron core 8. The hollow portion 7E of the spool 7 is fitted into the central leg 8A, and the fixed iron core 8 is sandwiched and fixed by the two leg portions 7A provided on the upper surface of the spool 7.

On the other hand, in the contact opening / closing mechanism, the main movable contact window 5A and the auxiliary movable contact window 5B above the contact support member 5 are respectively provided with the main movable contact 4, the spring receiving member 19, the coil spring 10 and the auxiliary movable contact. Contact 20, spring receiving 19A,
By mounting the coil spring 10A, the auxiliary movable contact window 5B is located above the electromagnet mechanism, and the contact support member 5 is provided.
The connecting pin 16 is inserted into the connecting hole 5D in the lower part of the lever and the through hole 13B in one end of the lever 13 to connect the both.
After that, if the lower case 2 is covered from below the contact opening / closing mechanism and the electromagnet mechanism to be combined with the upper case 1, the upper part (fixed iron core 8) of the electromagnet mechanism contacts the insulating plate 6, and the lower part (spool). The two legs 7B of 7 contact the pedestal 2A of the lower case 2 to fix the electromagnet mechanism.
The contact opening / closing mechanism is supported by the upper case 1 and the other end of the lever 13.

[0007]

In the assembly of the electromagnet mechanism portion in the above-mentioned conventional apparatus, the central leg 9A of the movable iron core 9 is inserted from below the hollow portion 7E of the spool 7, and the movable iron core 9 is attached to the spool 7. Two legs 7 provided on the bottom surface
The movable iron core 9 is clamped by a guide pin 11, and a guide pin 11 is sandwiched between the movable iron core 9 and the guide pin 12. The round pin 14 is inserted into a through hole 13C at the other end of the lever 13 to guide the guide pin 11. The center portion of the lever 13 is connected by the fulcrum pin 15 penetrating the column holes 7D of the two columns 7C provided on the lower surface of the spool 7 and the round hole 17A of the torsion spring 17. Then, the upper case 1 is placed upside down, the insulating plate 6 is attached to the rib 1A, and the fixed iron core 8 is mounted thereon.
Then, the leaf spring 18 is fitted into the central leg 8A of the fixed iron core 8. The hollow portion 7E of the spool 7 described above is attached to the central leg 8A.
2 legs 7A fitted on the upper surface of the spool 7
Then, the fixed iron core 8 is clamped and fixed.

Thus, when assembling the electromagnet mechanism,
The upper case 1 is placed upside down, the insulating plate 6 is attached to the rib 1A, the fixed iron core 8 is placed on the insulating plate 6, and the fixed iron core 8
The leaf spring 18 is fitted into the central leg 8A of the, and then the hollow portion 7E of the spool 7 to which the movable iron core 9 is attached is fixed to the fixed iron core 8A.
It is designed to be fitted into the central leg 8A of the above, and since the insulating plate 6 and the fixed iron core 9 are only stacked and placed, there is a state in which they can move freely, and there is wobbling or shifting when assembling each component. There was a problem that it was difficult to assemble.

Therefore, in view of the above-mentioned problems, it is an object of the present invention to provide an electromagnetic contactor which is easy to assemble without the parts wobbling or shifting when they are assembled.

[0010]

In order to achieve the above-mentioned object, the present invention inserts a central leg in which a leaf spring of an E-shaped fixed iron core is fitted into a hollow portion of a spool around which an electromagnetic coil is wound, and The E-shaped fixed iron core is sandwiched and fixed by the legs provided on the upper surface of the spool, and a guide metal fitting is attached to the lower part of the movable iron core having the same shape as the fixed iron core, and the central leg of the movable iron core is attached to the lower surface side of the spool. The movable iron core by sandwiching the movable iron core between the two legs provided on the lower surface of the spool, and bringing the upper surface of the fixed iron core into contact with the insulating plate attached to the rib of the upper case. And a contact opening / closing mechanism having a fixed contact, a movable contact, and a contact supporting member, wherein the mechanism is connected by a lever. Located on the diagonal That the two legs protrude, the leg portion of the spool upper surface of the electromagnet mechanism, characterized in that the formation of the insertion hole legs of the insulating plate is inserted.

[0011]

In the present invention configured as described above, the central leg of the fixed iron core having the leaf spring fitted in the hollow portion of the spool is inserted to sandwich the fixed iron core between the leg portions of the spool,
By inserting the legs of the insulating plate into the insertion holes formed in the leg of the spool by press-fitting and attaching them, the fixed core and the leaf spring that are incorporated between the spool and the insulating plate are attached to the spool. Can be maintained.

[0012]

FIG. 1 is an exploded perspective view of an essential part of an electromagnetic contactor showing an embodiment of the present invention. In the drawing, parts having the same functions as those of the conventional device shown in FIGS. is doing. In FIG. 1, 6 is an insulating plate again, and this insulating plate 6 is the same as the conventional device in that it has two convex portions 6A, 6A on the upper surface, but two insulating parts are provided on the diagonal line on the lower surface. Leg 6
It differs from the conventional device in that B and 6B are planted. 7 is a spool again, the electromagnetic coil 21 is wound in the same manner as in the conventional device, has a hollow portion 7E in the vertical direction in the center, two leg portions 7A, 7A are provided on the upper surface, and 2 are provided on the lower surface. The leg portions 7B and 7B and the two columns 7C and 7C are provided, and the column holes 7D and 7D are formed in the columns 7C and 7C, respectively.
Is perforated. This spool 7 is different from the conventional device in that insertion holes 7F, 7F into which the leg pieces 6B, 6B planted in the insulating plate 6 are press-fitted into the two leg portions 7A, 7A provided on the upper surface. Is the point that formed.

In the assembly shown in FIG. 1, the leaf spring (see FIG. 8) is inserted into the hollow portion 7E of the spool 7 from the upper surface side.
The center leg of the fixed iron core (see FIG. 8) fitted with is inserted, and the fixed iron core is sandwiched between the leg portions 7A, 7A of the spool 7. Then, the leg pieces 6B and 6B of the insulating plate 6 are attached to the spool 7
The spool 7, the fixed iron core, and the insulating plate 6 are integrated by press-fitting into the insertion holes 7F, 7F of the leg portions 7A, 7A. Thus, the leg portions 7A, 7A of the spool 7 are provided with the insertion holes 7F, 7F, and the insulating plate 6 is provided with the leg pieces 6B, 6B.
Insert the leg pieces 6B and 6B of the insulating plate 6 into the insertion holes 7F of the spool 7,
The spool 7 and the insulating plate 6 are only pressed into the 7F.
It is possible to hold the fixed iron core in which the leaf spring is fitted between and, and to assemble the electromagnet mechanism unit easily without wobbling or shifting.

FIG. 2 is an enlarged view of a main portion of the spool 7 showing another embodiment of the present invention. In FIG. 2, the leg portion of the spool 7 is again indicated by 7A, and 7F is an insertion hole formed in the leg portion 7A. The inner diameter of the insertion hole 7F is the leg piece 6B of the insulating plate 6 shown in FIG. Is formed to be larger than the diameter dimension of. Triangular convex projections 7G, 7G, 7G are formed on the inner wall of the insertion hole 7 at intervals of 120 degrees.
The diameter of the circle connecting the tips of G and 7G is smaller than the diameter of the leg piece 6B of the insulating plate 6. Therefore,
When the leg piece 6B of the insulating plate 6 is inserted into the insertion hole 7F, the leg piece 6B
The tips of the protrusions 7G, 7G, 7G are crushed by the
Is press-fitted into the insertion hole 7F.

The embodiment shown in FIG. 2 has the effect of absorbing the dimensional tolerance of each component. This will be described with reference to FIGS. 3 and 4. FIG. 3 shows a bottom view of the insulating plate 6,
The vertical and horizontal dimensions of the leg pieces 6B, 6B provided on the insulating plate 6 are Pm,
It is indicated by Lm. FIG. 4 shows a plan view of the spool 7,
The vertical and horizontal dimensions of the insertion holes 7F and 7F provided in the legs 7A and 7A are indicated by Ps and Ls. The leg pieces 6B and 6B shown in FIG.
The vertical and horizontal dimensions Pm and Lm are maximum tolerances, and the vertical and horizontal dimensions Ps and L of the insertion holes 7F and 7F shown in FIG.
When s is the minimum tolerance in terms of dimensional tolerance, Pm-Ps and L
The tolerance with respect to m-Ls is set as the crushing allowance of the convex portions 7G, 7G, 7G provided on the inner walls of the insertion holes 7F, 7F, and the convex portions 7G, 7G,
By defining the protrusion size of 7G, even when the above-mentioned dimensional tolerance occurs, it can be absorbed by the convex portions 7G, 7G, 7G of the insertion holes 7F, 7F, 7F.

In the embodiment shown in FIG. 2, the diameter of the insertion holes 7F, 7F provided in the leg portions 7A, 7A of the spool 7 is increased and the convex portions 7G, 7G, 7G are formed on the inner wall thereof. However, the convex portions 7G, 7G, 7 of the embodiment shown in FIG.
Instead of G, a protrusion may be formed on the peripheral wall of the leg piece 6B of the insulating plate 6.

[0017]

As described above, according to the present invention,
Insert the center leg with the leaf spring of the E-shaped fixed iron core fitted into the hollow part of the spool around which the electromagnetic coil is wound, and clamp and fix the E-shaped fixed iron core with the legs provided on the upper surface of the spool. A guide metal fitting is attached to a lower portion of a movable iron core having the same shape as that of the fixed iron core, and the central leg of the movable iron core is inserted into the hollow portion from the lower surface side of the spool, and the two leg portions provided on the lower surface of the spool are attached. Contacting opening / closing mechanism having a fixed contact, a movable contact, and a contact support member, and an electromagnet mechanism section in which a movable iron core is sandwiched and fixed by an upper plate, and an upper surface of the fixed iron core is brought into contact with an insulating plate attached to a rib of an upper case. In the electromagnetic contactor in which both the mechanical parts are connected by a lever, two leg pieces located diagonally on the lower surface of the insulating plate of the electromagnet mechanical part are provided so as to project, and the spool of the electromagnet mechanical part is provided. On the top By forming the insertion hole into which the leg portion of the insulating plate is inserted, it is possible to maintain the fixed iron core and the leaf spring incorporated between the spool and the insulating plate in the state of being attached to the spool. The fixed iron core, the leaf spring, and the insulating plate can be assembled together, and the assemblability can be improved.
In addition, the insertion hole formed in the leg portion of the spool upper surface has a hole diameter larger than the diameter of the leg piece of the insulating plate and is provided with a plurality of protrusions on its inner wall, or the insertion hole formed in the leg portion of the spool upper surface. By making the hole diameter of the insertion hole larger than the diameter of the leg of the insulating plate and providing a plurality of protrusions on the peripheral wall of the leg of the insulating plate, the difference formed between the two legs of the insulating plate and the leg of the spool. Even if the center position of the insertion hole is displaced, the insulating plate can be easily inserted and attached to the insertion hole of the spool.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of an electromagnetic contactor showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of a spool showing a different embodiment of the present invention.

FIG. 3 is a bottom view of the insulating plate of the present invention.

FIG. 4 is a plan view of the spool of the present invention.

FIG. 5 is a side sectional view showing a conventional electromagnetic contactor.

6 is a sectional view taken along the line AA of FIG.

7 is a sectional view taken along the arrow R in FIG.

8 is an exploded perspective view of the electromagnet mechanism portion of FIG.

9 is an exploded perspective view of the contact opening / closing mechanism portion of FIG.

[Explanation of symbols]

 1 Upper Case 2 Lower Case 5 Contact Support Member 6 Insulation Plate 7 Spool 8 Movable Iron Core 9 Fixed Iron Core 1A Rib 6A Convex 6B Leg 7A Leg 7B Leg 7C Support 7D Support Hole 7E Hollow 7F Insert Hole 7G Convex

Claims (3)

[Claims] 1. A center leg having a leaf spring of an E-shaped fixed iron core fitted therein is inserted into a hollow portion of a spool around which an electromagnetic coil is wound, and a leg portion provided on the upper surface of the spool forms the E-shaped fixed iron core. It is sandwiched and fixed, a guide metal fitting is attached to the lower part of a movable iron core having the same shape as the fixed iron core, and the center leg of the movable iron core is inserted into the hollow portion from the lower surface side of the spool, and the guide is provided on the lower surface of the spool. An electromagnet mechanism section in which a movable iron core is sandwiched and fixed by individual legs, and an upper surface of the fixed iron core is brought into contact with an insulating plate attached to a rib of an upper case, a fixed contact, a movable contact, and a contact support member. In the electromagnetic contactor consisting of a contact opening / closing mechanism part having a lever connecting the both mechanism parts, on the lower surface of the insulating plate of the electromagnet mechanism part,
An electromagnetic contactor characterized in that two leg pieces located on the diagonal line thereof are provided so as to project, and an insertion hole into which the leg portion of the insulating plate is inserted is formed in the leg portion of the spool upper surface of the electromagnet mechanism portion. . 2. The insertion hole formed in the leg portion on the upper surface of the spool according to claim 1, wherein the hole diameter is larger than the diameter of the leg piece of the insulating plate, and the inner wall has a plurality of convex portions. An electromagnetic contactor characterized by. 3. The spool according to claim 1, wherein a diameter of the insertion hole formed in the leg portion on the upper surface of the spool is larger than a diameter of the leg piece of the insulating plate, and a plurality of convex portions are formed on a peripheral wall of the leg piece of the insulating plate. An electromagnetic contactor comprising: