JPH0510346Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an iron core used in electrical equipment, and particularly to a stacked iron core constructed by stacking thin plate iron core materials.

[Prior Art] Fig. 6 is a perspective view showing a stacked core of a conventional electric equipment, and in the figure, 1 indicates a yoke part 2 and a leg part 3.
It is a stacked iron core composed of. This stacked iron core 1
is wound into a roll as shown in FIG.
For example, a rectangular yoke portion 2 and a rectangular leg portion 3 are formed by cutting a thin electrical steel plate 4, and these are stacked according to a predetermined rule. In addition, FIG. 8 is a plan view of FIG. 6, and the yoke part 2
This shows the joint between the leg portion 3 and the leg portion 3.

Iron core materials used in electrical equipment generally include
Electrical steel sheets with a thickness of about 0.3 to 0.5 mm are often used, but in recent years, with the reduction of core loss, ultra-thin core materials such as amorphous amorphous are being used. .

[Problems to be solved by the invention] However, in order to form the conventional laminated core 1, it is necessary to cut the core material, and high-performance cutting technology is required for high-hardness core materials, so a cutting device is required. The equipment has become more sophisticated, and maintenance of the cutting means of the equipment is also becoming more difficult. Furthermore, in the case of ultra-thin iron core materials, there are problems such as the influence of cutting precision on magnetic properties becomes large.

In order to solve this problem, Japanese Patent Application Laid-Open No. 59-178714
The publication discloses an invention in which an iron core is formed by bending an iron core material so that the final shape becomes a picture frame shape.

However, since the device disclosed in JP-A-59-178714 has the above-mentioned configuration, it is necessary to wind the leg portions after forming the frame-shaped core. It is necessary to wind the core in the shape of a shape, which reduces the efficiency of the winding work.Also, since the winding becomes circular during winding, if the core has a rectangular cross section, the core space inside the winding will decrease. The rate decreases, which in turn requires more winding material, and
This will lead to larger size.

Furthermore, in the device disclosed in JP-A-59-178714, as stated in the specification, the thickness of the bent portion is smaller than that of the other portion (the portion between the bent portions). ) and the magnetic properties become uneven, so it is necessary to insert a strip of iron core material between the bent parts, and in reality it is difficult to cut the core material. In addition to requiring a large amount of iron core material, the work efficiency is reduced due to the work involved in inserting the core material.

This idea was made to solve the above-mentioned problems, and the advantages of the lap manufacturing method shown in Figure 6 are that the winding efficiency is good because the winding and the core can be manufactured separately, and the core cross section is rectangular. The purpose of this invention is to minimize cutting of the core material while taking advantage of the fact that the core space factor inside the winding does not decrease even when the core space factor inside the winding is low, and to obtain a core for electrical equipment with good workability.

[Means for Solving the Problems] A stacked iron core for electrical equipment according to this invention is made by folding and stacking iron core materials having a predetermined length, and having a plurality of engaging portions facing each other at both ends with a predetermined gap in between. A linear yoke portion and leg portions are formed, and the engaging portion of the yoke portion is connected to the space between the engaging portions of the leg portions.
At the same time, the engaging portions of the leg portions are inserted into the spaces between the engaging portions of the yoke portion, so that the two are combined to form a mouth shape.

[Function] In this invention, the iron core material is continuously bent, and by repeating this process, a yoke part and a leg part having laminated parts and engaging parts are formed, and by combining the respective engaging parts with each other, , collectively constitute a stacked core.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1a represents a stacked iron core composed of a yoke portion 2a and leg portions 3a.

As shown in FIG. 2, the yoke portion 2a and the leg portions 3a are formed by continuously bending a core material having a predetermined length to form a laminated portion 5.
While forming engaging portions 6 alternately on both ends of these,
This process is repeated until a predetermined core stack height is reached. At this time, the bent portions of the core materials and the laminated portions 5 are formed in such a state that the respective core materials are in close contact with each other without any gaps, and a predetermined gap is formed between the engaging portions 6.

Next, after inserting the coils 7 individually formed in advance into the leg portions 3a, the engaging portions 6 of the yoke portion 2a are inserted between the engaging portions 6 of the leg portions 3a, and
By inserting the engaging portions 6 of the leg portions 3a between the engaging portions 6 of the yoke portion 2a, the basic structure of the transformer shown in FIG. 4 is obtained. At this time, since there is a gap between the engaging parts 6, the insertion work of the engaging parts 6 can be performed smoothly.

Also, in FIG. 1, the coil 7 in the one in FIG.
The stacked iron core 1a is shown with the parts removed. Also, Figure 3 is
It is a top view of the figure, and the yoke part 2a and the leg part 3a
This shows the combination part.

As described above, in this invention, the yoke portion 2a and the leg portions 3a are formed by repeatedly bending the iron core material, and the yoke portion 2a and the leg portion 3a are combined, instead of stacking rectangularly cut iron core materials. It collectively constitutes the stacked iron core 1a.

In addition, in the above embodiment, the laminated part 5 and the engaging part 6
The number of times the core material is bent is one time, but it may be bent multiple times as shown in FIG. Even if it is formed, the same effect as in the above embodiment can be obtained.

[Effects of the invention] As described above, according to this invention, in a laminated core for electrical equipment having a mouth shape, core materials having a predetermined length are folded and laminated, and a predetermined void is formed at both ends.
forming a linear yoke portion and leg portions having a plurality of engaging portions facing each other via the yoke portion, and inserting the engaging portion of the yoke portion into the space between the engaging portions of the leg portion; Since the engaging portions of the leg portions are inserted into the hollow portions between the engaging portions of the yoke portion and the two are combined to form a mouth shape, cutting of the core material can be minimized while taking advantage of the lap manufacturing method.

Furthermore, by simply combining the leg portions and the yoke portion, the mouth-shaped core can be assembled all at once, and the efficiency of the core manufacturing work is greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a stacked core of an electrical equipment according to this invention, Fig. 2 is a perspective view of a yoke part and leg part of this invention, Fig. 3 is a partially enlarged view of a core combination part of this invention, and Fig. 4 The figure is a basic structural diagram of a transformer showing an example according to this invention, FIG. 5 is a perspective view of a yoke part and a leg part according to another embodiment of this invention, and FIG.
The figure is a perspective view showing the stacked core of conventional electrical equipment.
The figure shows a cut state of a conventional iron core material, and FIG. 8 is a partially enlarged view of a conventional iron core joint. In the figure,
1a is a stacked iron core, 2a is a yoke portion, 3a is a leg portion, 5 is a laminated portion, and 6 is an engaging portion. In addition, in the figures, the same reference numerals indicate the same parts.

Claims (1)

[Scope of utility model registration request] In a stacked core for electrical equipment having a mouth shape, core materials having a predetermined length are folded and laminated,
Forming a linear yoke portion and leg portions having a plurality of engaging portions facing each other with a predetermined gap at both ends,
The engaging portion of the yoke portion is inserted into the space between the engaging portions of the leg portion, and the engaging portion of the leg portion is inserted into the space between the engaging portions of the yoke portion to connect both. A stacked iron core for electrical equipment characterized by having a combination opening shape.