JPH0650971Y2 - Electromagnetic iron core for three-phase transformer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic iron core for a three-phase transformer.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional electromagnetic iron core for a three-phase transformer has three types of I-shaped iron pieces (72) (73) having the same width and thickness but different lengths. (74) is laminated, and a crossing rod (71) is provided in the center of a rectangular frame body (7).

In the above electromagnetic iron core, the abutting portions of the iron pieces of the respective layers do not overlap with the abutting portions of the iron pieces of the layers adjacent to each other in the vertical direction, so that they are symmetrically overlapped by 180 °.
Since it was necessary to manually combine the iron pieces of each kind one by one, there was a problem that the work efficiency was poor and the work efficiency was poor. The present invention clarifies an electromagnetic iron core for a three-phase transformer that dramatically improves assembly work efficiency.

[0004]

The electromagnetic iron core for a three-phase transformer of the present invention comprises three identical L-shaped blocks (1) (1a) (1b) formed by laminating punched iron pieces (3) (4), respectively. And one type I block
(2) are combined to form a rectangular frame block (8) by applying the long side (11) of one L-shaped block (1) to the short side (12a) of another L-shaped block (1a). After forming, the U-shaped block (9) is formed by applying the I-shaped block (2) to the long side (11b) of the remaining L-shaped block (1b), and the long side (11a) of the frame-shaped block (8).
Both ends of the U-shaped block (9) are brought into contact with both ends of each of the L-shaped blocks, and each iron piece of each L-shaped block and I-shaped block is caulked and fixed to the adjacent iron piece in the stacking direction.
The ridges (13) and (21) are formed on one of the abutting surfaces of the mold block and the I-shaped block, and the concave ridges (14), (15) and (16) are formed on the other, and they are tightly engaged with each other.

[0005]

[Operation and effect] Since the iron pieces (3) and (4) used as the material may be of two types of L type and I type, the number of types of parts can be reduced as compared with the case of using three types of conventional iron pieces. Also, iron pieces
(3) Laminate the required number of (4), and three L-shaped blocks (1)
(1a) (1b) and one I-shaped block (2) are formed, and one L
A rectangular frame-shaped block (8) is formed by applying the short side (12a) of another L-shaped block (1a) to the long side (11) of the mold block (1),
I-shaped block on the long side (11b) of the remaining L-shaped block (1b)
(2) is applied to form a U-shaped block (9), and both ends of the U-shaped block (9) are brought into contact with both ends of the long side (11a) of the frame-shaped block (8), and each L-shaped block ( 1) (1a) (1b) and the convex strips (13) (21) of the I-shaped block (2) to the concave strips (14) (15) (1) of the mating block.
It can be formed by press-fitting into 6), and the workability of assembling can be greatly improved as compared with the conventional method in which iron pieces (3) and (4) are manually combined and laminated.

[0006]

EXAMPLE FIG. 1 shows an electromagnetic iron core for a three-phase transformer, which has three identical L-shaped blocks (1) (1a) (1b) formed by laminating punched iron pieces (3) (4), respectively. ) And one type I block
It is formed by combining (2).

As shown in FIG. 2, the length A ₁ of the I-shaped block (2) is obtained by subtracting the width A ₃ of the long side from the length A ₂ of the short side (12b) of the L type block (1b). Match the length.

Short sides (12) (12) of the L-shaped blocks (1) (1a) (1b)
A ridge (13) is formed in the front end surface of (a) and (12b) in the stacking direction, and a concave ridge (14) is formed in the stacking direction in the base end surface corresponding to the ridge.
The ridges (13) and the recesses (14) have a dimensional relationship such that they can be press-fitted. L-shaped blocks (1) (1a) (1b) long sides (11) (11a) (11b) on both sides of the tip of the concave groove (15) (16) and the same shape as the above-mentioned groove (14)
Are formed in the stacking direction.

The positions of the concave stripes (15) and (16) are such that when the convex stripe (13) at the tip of the short side of another L-shaped block is press-fitted into the concave stripe, the length of one L-shaped block (1) is increased. It is determined that the leading edge of the side (11) and the outer edge of the short side (12a) of the other L-shaped block (1a) are aligned.

L-shaped blocks are provided at both ends of the I-shaped block (2).
The ridges (21) and (21) having the same shape as the ridge (13) of (1) are formed. The positions of the ridges (21) and (21) of the I-shaped block (2) are located on the ridges (15) and (16) of the long sides of the L-shaped blocks (1a) and (1b).
When press-fitting, the side edges of the I-shaped block (2) and the leading edges of the long sides (11a) and (11b) of the L-shaped blocks (1a) and (1b) are aligned with each other. L-shaped block (1) (1a) (1b) long side (1
1) Through holes 6 for attachment are formed at both ends of 11a and 11b.

The L-shaped blocks (1) (1a) (1b) and the I-shaped block (2) are constructed by laminating the L-shaped iron pieces (3) and I-shaped iron pieces (4), respectively. ) Is formed by continuously punching out the band iron, and one or more punching parts (5) are formed during punching, and the iron pieces are sequentially stacked each time the iron piece is continuously manufactured from the band iron. While being pressed, the embossing section (5) is caulked. The embossing section (5) is one in which cut lines (51) (51) are provided in parallel and the space between the cut lines (51) (51) is expanded.

As shown in FIG. 3, the iron pieces (3) and (4) are provided with through holes (50) corresponding to the punching portions (5) every predetermined number of pieces, and the iron pieces (50) having the through holes (50) are formed. 3a) (4a) is the lower iron piece (3b) (4
The shape is such that it does not engage with the punched-out portion of b) but the punched-out portion of the upper iron piece can be press-fitted. Therefore, more than the specified number of iron pieces
(3) (4) are not overlapped and crimped, and a block having a predetermined thickness is formed.

However, the long side of one L-shaped block (1) (1
1) inside the concave stripe (15) to another L-shaped block (1a) short side (12
The ridge (13) of a) is press-fitted by a hydraulic press or the like to form a rectangular frame block (8). Remaining L-shaped block (1b)
The U-shaped block (9) is formed by press-fitting the ridge (21) at one end of the I-shaped block (2) into the recess (15) inside the long side (11b).

One of the L-shaped blocks (1
U-shaped blocks on the concave strips (14) (16) at both ends of the long side (11a) of (a)
The ridges (13) and (21) at both ends of (9) are press-fitted to form an electromagnetic iron core for a three-phase transformer.

Since the iron pieces (3) and (4) used as the material of the electromagnetic iron core may be of two types, L type and I type, the number of types of parts can be reduced as compared with the conventional case of using three types of iron pieces. it can.
Also, stacking the required number of iron pieces (3) (4) to form three L-shaped blocks (1) (1a) (1b) and one I-shaped block (2),
Another L-shaped block on the long side (11) of one L-shaped block (1)
The short side (12a) of (1a) is applied to form a rectangular frame-shaped block (8), and the long side (11b) of the remaining L-shaped block (1b) is applied to the I-shaped block (2) to make a U-shape. -Shaped blocks (9) are formed, and U-shaped blocks (9) are formed at both ends of the long side (11a) of the frame-shaped block (8).
Abutting both ends of each of the L-shaped blocks (1) (1a) (1b) and the I-shaped block (2) with the ridges (13) (21) of the mating block
(16) can be formed by press-fitting, and assembling workability can be greatly improved as compared with the conventional method in which iron pieces (3) and (4) are manually combined and laminated. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the utility model registration claim.

[Brief description of drawings]

FIG. 1 is a perspective view of an electromagnetic iron core.

FIG. 2 is a plan view of an electromagnetic iron core.

FIG. 3 is a sectional view of a caulking portion of a laminated iron piece.

FIG. 4 is an explanatory perspective view of a conventional example.

[Explanation of symbols]

 (1) L-shaped block (11) Long side (12) Short side (13) Convex line (14) Recessed line (15) Recessed line (16) Recessed line

Claims (1)

[Scope of utility model registration request] 1. Three identical L-shaped blocks (1) (1a) (1b) and one I formed by laminating punched iron pieces (3) (4), respectively.
Formed by combining the mold blocks (2), one L-shaped block (1) has a long side (11) and another L-shaped block (1a) has a short side (12).
A) is applied to form a rectangular frame-shaped block (8), and the I-shaped block (2) is applied to the long side (11b) of the remaining L-shaped block (1b) to form a U-shaped block (9). Then, both ends of the U-shaped block (9) are brought into contact with both ends of the long side (11a) of the frame-shaped block (8), and each iron piece of each L-shaped block and I-shaped block is connected to an iron piece adjacent in the stacking direction. The ridges (13) and (21) are formed on one side of the L-shaped blocks and the abutting surfaces of the L-type block and the I-type block, and the ridges (14), (15) and (16) are formed on the other side. Magnetic iron cores for three-phase transformers that are tightly engaged with each other.