JP2846606B2 - Laminated structure of electrical steel sheets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated structure of magnetic steel sheets used for transformers and relays.

[0002]

2. Description of the Related Art Conventionally, an electromagnetic steel sheet used for forming a magnetic flux in a transformer bobbin, a relay coil, a solenoid bobbin, and the like is formed by laminating a plurality of thin plates, and the laminated thin plates are fixed. To do this, for example, flat U-shaped or E-shaped thin plates are abutted against each other, the outer periphery is fixed with adhesive tape, resin is filled and fixed in the delivery case, or common to laminated thin plates Some of them have holes formed and fastened with bolts.

[0003]

However, when the output power used becomes large, the abutting portion may be peeled off or a beat may be produced with a tape or resin.
On the other hand, there is a drawback that the work of laminating and fastening with bolts is complicated and time-consuming.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a magnetic steel sheet having a required shape whose plane shape is symmetrical in a transverse direction or a longitudinal direction, and a predetermined shape symmetrical in a transverse direction or a longitudinal direction at an outer peripheral end of the electromagnetic steel sheet. A plurality of engaging portions each formed of a notch groove are notched at a position, and the electromagnetic steel plates are asymmetrically formed so as to separate the plurality of engaging portions from each other in a longitudinal direction or a transverse direction.
Divided to form two divided electromagnetic steel sheets, the two divided electromagnetic steel sheets are alternately stacked left and right or up and down in a planar shape, and the upper layer and the lower layer are alternately stacked, and each of the two positioned electromagnetic steel sheets located at the outer peripheral end of the stacked electromagnetic steel sheets It is an object of the present invention to provide a laminated structure of an electromagnetic steel sheet in which a fixing means is fitted and fixed in a continuous groove formed by an engaging portion.

[0005]

Further, according to the present invention, in the laminated structure of the magnetic steel sheets according to the first aspect, the engaging portions formed on the divided magnetic steel sheets are positioned at right and left positions at the same distance from the outer end of each magnetic steel sheet. It is an object of the present invention to provide a laminated structure of electromagnetic steel sheets formed as cutout grooves, wherein the fixing means is formed as left and right locking members respectively fitted into the left and right cutout grooves.

Further, according to the present invention, in the laminated structure of the electromagnetic steel sheets according to the first aspect, the engaging portions formed on the divided electromagnetic steel sheets are formed at positions where the same distance is maintained from the outer ends of the respective electromagnetic steel sheets. The present invention provides a laminated structure of electromagnetic steel sheets, wherein the laminated structure is formed as left and right locking holes, and the fixing means is formed as left and right locking rods respectively fitted into the left and right locking holes. .

[0008]

[0009]

According to the present invention, when the divided magnetic steel sheets are replaced in the upper layer and the lower layer and stacked alternately, a groove continuous with the outer peripheral end of the electromagnetic steel sheet is formed by the engaging portion, and the fixing means is fixed to the continuous groove. Since it is fitted and fixed, the laminated body of the asymmetrically divided electromagnetic steel sheets can be integrally fixed as a whole in the vertical, horizontal, and front and rear directions. In the manufacturing process, a large number of thin electromagnetic steel sheets are first divided asymmetrically into two.

Next, when laminating the electromagnetic steel sheets divided into two parts, the asymmetric steel sheets are alternately stacked on the left and right sides alternately and vertically.

Then, the stacked central portion or the left and right portions are locked and fixed by a locking member.

That is, the laminated electromagnetic steel sheet is fixed by a fixing means such as a locking member. As a specific fixing means, a steel sheet fixing member in which the laminated electromagnetic steel sheet is attached to a bobbin case or the like is provided outside the electromagnetic steel sheet. There is a case where the locking member or the locking rod is fitted into the left and right notch grooves or the left and right locking holes of the left and right magnetic steel plates which are asymmetrically divided into two. In addition to the fixing means, the center locking member or the center locking rod is fitted in the center notch groove or the center notch hole to further restrict the displacement in multiple directions. This is for fixing.

In this way, the laminated electromagnetic steel plates are fixed by the locking members or the locking rods. In particular, the central locking member or the central locking rod at the center is one of the asymmetric steel plates stacked differently from each other. And the other steel plate is sandwiched between the steel plates, so that the left and right locking members or the left and right locking rods are By fixing the center and the right and left locking members, the abutting direction of the asymmetric steel plate and the fixing thereof in the direction perpendicular to the plane thereof are performed, and further, by alternately stacking up and down, The clamping and fixing in the stacking direction will also be performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a left magnetic steel sheet 1 and a right magnetic steel sheet 2 obtained by dividing a rectangular frame-shaped electromagnetic steel sheet into two asymmetrical parts. The left magnetic steel sheet 1 and the right magnetic steel sheet 2 are formed by alternately laminating the left and right magnetic steel sheets 2 up and down. In addition, various shapes are adopted as the shape of the electromagnetic steel sheet by combining square frames.

These laminated magnetic steel sheets M are fixed via the following fixing means.

The fixing means shown in FIG. 1 is described by taking as an example a case where an electromagnetic steel sheet M is used for a bobbin for a transformer. As the fixing means, a primary bobbin a, a secondary bobbin b, and a case c are projected. The electromagnetic steel sheets M stacked on the holding frame F provided are brought into contact with each other to regulate and fix the outer edges of the magnetic steel sheets M.

As another fixing means, as shown in FIG. 2, left and right notched grooves 3 and 4 having a constant width in the left and right magnetic steel plates 1 and 2 having the same distance L from the outer end are provided.
And left and right locking members 5 and 6 shown in FIG. 3 are fitted into the left and right cutout grooves 3 and 4, respectively.

The left and right cutout grooves 3, 4 may be provided only on one side edge of the rectangular frame-shaped electromagnetic steel sheet, or may be provided on both side edges.

The left and right locking members 5 and 6 may be formed as separate left and right band-shaped members, or as shown in FIG. 3, the left and right locking members 5 and 6 may be integrally connected. is there.

In the drawing, reference numeral 15 denotes a connecting member.

FIGS. 4 and 5 show other fixing means.
As shown in FIG.
6 are provided with left and right locking holes 7 and 8 and left and right locking rods 9 and 10.
As shown in FIG. 6, they can be connected and integrated.

As another fixing means, as shown in FIGS. 7 to 13, a central notch groove 11 is provided at the center between the left and right notch grooves 3, 4 or at the center between the left and right locking holes 7, 8. Alternatively, a central locking hole 12 is formed, and a central locking member 13 or a central locking rod 14 fitted into the notch groove 11 or the locking hole 12 is formed.
The left and right locking members 9 and 10 and the center locking rod 14 are integrally connected via the connecting member 15 together with the left and right locking members 5 and 6 and the center locking member 13 as necessary. Further, as shown in FIG. 9, when the band-shaped left and right locking members 5 and the central locking member 13 are integrated, the connecting member 15 presses the upper and lower surfaces of the laminated electromagnetic steel plate. As shown in FIG. 10, the connecting member 15 may be made of a spring steel tapered slightly in the front end direction. Some have formed a piece 16.

It should be noted that the structure of the connecting member 15 and the striking piece 16 can be applied to the case of the structure of only the left and right locking members 5 and 6 or the structure of only the left and right locking rods 9 and 10. Of course.

As shown in FIG. 13, the connecting members 15 are also used in the case of the rod-shaped left and right locking rods 8, 10 and the central locking rod 14.
Can be integrally connected via the. Further, the magnetic steel sheet M in each of the above embodiments is configured such that the left magnetic steel sheet 1 and the right magnetic steel sheet 2, which are asymmetrically divided into two, are alternately stacked on the left and right sides.
As shown in FIG. 4, a symmetrical symmetric electromagnetic steel plate 1a can be formed by laminating. In this case, the symmetric electromagnetic steel sheet 1a is formed as one kind of substantially J-shaped flat form by punching or the like of an electromagnetic steel sheet having both surfaces coated with an insulating film. In order to assemble the symmetric electromagnetic steel sheet 1a having a substantially J-shaped plane as described above so as to have a rectangular frame shape as shown in FIG. In the state where the magnetic steel sheet 1a is turned upside down in the direction of arrow A in the same figure (B), the end faces are brought into contact with each other, and the symmetric magnetic steel sheet 1a laminated on the one symmetric magnetic steel sheet 1a is turned over. The symmetric electromagnetic steel sheets 1a stacked on the other symmetric electromagnetic steel sheet 1a are stacked without being inverted, while being stacked in an inverted state. By thus inverting every other symmetric electromagnetic steel sheet 1a vertically stacked and sequentially stacking to form the electromagnetic steel sheet M, it is possible to cope with a single kind of symmetric electromagnetic steel sheet 1a, and to perform the punching process. In case of performing, it can be formed by a single mold. Also, as shown in FIG. 15, the left and right notch grooves 3 and 4 are fitted into the left and right notch grooves 3 and 4 with respect to the groove width L2 of the left and right notch grooves 3 and 4 formed at the side ends of the left and right electromagnetic steel sheets 1 and 2. In this configuration, the member width L3 of the left and right locking members 5 and 6 is slightly increased. By press-fitting the left and right locking members 5, 6 formed in this way into the corresponding left and right cutout grooves 3, 4, the right and left electromagnetic steel plates 1, 2 are stacked. Can be more firmly assembled. In particular, when the left and right electromagnetic steel sheets 1 and 2 are formed by punching a thin electromagnetic steel sheet coated with an insulating film, the left and right electromagnetic steel sheets 1 and 2 serving as cut surfaces of the punching processing are used. Is not coated with an insulating film. The left and right locking members 5 and 6 made of a conductive material are connected to the left and right notch grooves 3 and 4 formed on the side end surfaces of the left and right electromagnetic steel plates 1 and 2 not coated with the insulating coating. By press-fitting, the left and right locking members 5
6 can be configured as a ground electrode for each of the laminated electromagnetic steel sheets 1 and 2. The left and right locking members 5 and 6 are desirably formed of a conductive material softer than the material of the left and right electromagnetic steel plates 1 and 2, for example, copper, aluminum, or the like. The relationship between the groove width L2 of the left and right notch grooves 3, 4 and the member width L3 of the left and right locking members 5, 6 is the same in the case of the embodiments described in FIGS. Can be applied to However, in the case of the embodiment shown in FIGS. 4 to 6, the right and left locking rods 8 and 9 inserted into the left and right locking holes 7 and 8 are also formed in a tapered shape, and the left and right locking holes 7 and 8 stacked are stacked. , 8 are desirably brought into contact with the left and right locking rods 8, 9.

[0025]

According to the present invention, when the divided magnetic steel sheets are exchanged between the upper layer and the lower layer and stacked alternately, a groove continuous with the outer peripheral end of the magnetic steel sheet is formed by the engaging portion,
Since the fixing means is fitted and fixed in the continuous groove portion, there is an effect that the laminated body of the asymmetrically divided electromagnetic steel sheets can be integrally fixed as a whole in the vertical, horizontal, and front and rear directions. Things. In other words, in order to divide the electromagnetic steel plate into two asymmetrical shapes and stack them alternately up and down alternately, the respective steel plates are fixed at the time of stacking in the vertical direction, and the flat steel plate is fixed by a vertical locking member or locking rod. The slide movement can be fixed, and the effect of performing the lamination and fixing of the electromagnetic steel sheets with a simple structure can be obtained.

In particular, a left and right notch groove and a left and right locking hole are formed at the left and right symmetrical positions of the magnetic steel sheet, and a left and right locking member and a left and right locking rod are fitted into the notch groove and the locking hole to form a planar shape. Has the effect of restricting and fixing the sliding movement of the magnetic steel sheet in a certain direction. In addition, a central groove or a central locking hole is formed in the center of the magnetic steel sheet, and the central locking member and the central locking Inserting the rod has the effect of regulating and fixing the sliding movement in the front-rear and left-right directions without the need for other restricting members. This has the effect of being able to fix.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state in which a laminated structure of an electromagnetic steel sheet of the present invention is fixed via a holding case.

FIG. 2 is an explanatory view showing a laminated state of electromagnetic steel sheets having left and right cutout grooves.

FIG. 3 is an explanatory view showing left and right locking members.

FIG. 4 is an explanatory view showing a laminated state of electromagnetic steel sheets having left and right locking holes.

FIG. 5 is an explanatory view showing left and right locking rods.

FIG. 6 is an explanatory view showing left and right locking rods connected by a connecting member.

FIG. 7 is an explanatory view showing a laminated state of electromagnetic steel sheets having left and right cutout grooves and a central cutout groove.

FIG. 8 is an explanatory view of a state in which the left and right locking members and the central locking member are integrated by a connecting member.

FIG. 9 is a partially cutaway explanatory view of the electromagnetic steel sheet fixed by a locking member.

FIG. 10 is an explanatory view showing a deformation of a locking member.

FIG. 11 is an explanatory view showing a laminated state of magnetic steel sheets having left and right locking holes and a central locking hole.

FIG. 12 is an explanatory view showing a left-right locking rod and a center locking rod.

FIG. 13 is an explanatory view of a state in which each locking rod is integrated with a connecting member.

FIG. 14 is a plan view of each electromagnetic steel sheet in a laminated structure of electromagnetic steel sheets according to another embodiment.

FIG. 15 is a perspective view illustrating a lamination assembling operation of each electromagnetic steel sheet in a laminated structure of electromagnetic steel sheets according to another embodiment.

FIG. 16 is a detailed explanatory view of left and right notched grooves and left and right locking members in a laminated structure of electromagnetic steel sheets according to another embodiment.

FIG. 17 is a mounting state diagram of left and right locking members in a laminated structure of electromagnetic steel sheets according to another embodiment.

[Explanation of symbols]

 1 Left electromagnetic steel plate 2 Right electromagnetic steel plate 3 Left notch groove 4 Right notch groove 5 Left locking member 6 Right locking member 7 Left locking hole 8 Right locking hole 9 Left locking rod 10 Right locking rod 11 Center notched groove 12 Center locking hole 13 Center locking member 14 Center locking rod 15 Connecting member 16 Raised piece M Electrical steel plate L Distance

Claims (3)

(57) [Claims] 1. A plurality of electromagnetic steel sheets each having a required shape whose plane shape is symmetrical in a transverse direction or a longitudinal direction, and having a notch structure at a predetermined position symmetrical in the transverse direction or a longitudinal direction at an outer peripheral end of the electromagnetic steel sheet. Notches are formed in the engaging portions, and the electromagnetic steel plates are asymmetrically divided into two so as to separate the plurality of engaging portions in the longitudinal direction or the transverse direction from each other to form two divided electromagnetic steel plates. The upper and lower layers are alternately laminated by replacing the electromagnetic steel sheet in the plane shape left and right or up and down, and the fixing means is fitted into a continuous groove portion formed by each engaging portion located at the outer peripheral end of the laminated electromagnetic steel sheet. A laminated structure of magnetic steel sheets characterized by being fixed. 2. The laminated structure of an electromagnetic steel sheet according to claim 1, wherein the engaging portions formed on the divided electromagnetic steel sheets are formed as left and right cutouts at positions that maintain the same distance from the outer end of each electromagnetic steel sheet. A laminated structure of electromagnetic steel sheets, wherein the fixing means is formed as left and right locking members respectively fitted into left and right cutout grooves. 3. The left and right locking according to claim 1, wherein the engaging portions formed on the divided magnetic steel plates are formed at positions where the engagement portions formed at the same distance from the outer ends of the respective magnetic steel plates. The laminated structure of the electromagnetic steel plates, wherein the laminated structure is formed as a hole, and the fixing means is formed as left and right locking rods respectively fitted into the left and right locking holes.