JPH07245226A - Method for attaching coil in electrical apparatus - Google Patents

Abstract

PURPOSE:To reduce the cost for attaching a coil onto an iron core by butting the tip of iron core projection part on the tip of a bobbin holding part wound with a coil and shifting a bobbin from the bobbin holding part to the projection part. CONSTITUTION:A bobbin holding part 41 having the same sectional shape as that of a projection part 21 of an iron core 2 is formed on the tip end of a rotating part of a winding machine, and an end insulation part 11 and intermediate insulation part 12 forming a bobbin 1 is fixed on the part 41. Then, two parts 11 and two parts 12 are fitted onto the part 41 and fixed thereon by a bobbin reatiner 43. In this state, the part 4 is rotated to wind a coil 3 around the bobbin 1. Further, the retainer 43 is removed, and while the tip of the part 21 is butted on the tip of the part 41, the bobbin 1 is pressed toward the part 21 to shift it from the part 41 to the part 21, thus completing the attachment of the coil 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a coil on an iron core of an electric device such as a motor or a transformer by using a bobbin.

[0002]

2. Description of the Related Art Conventionally, a coil bobbin for electric equipment comprises a hollow body around which a coil is wound and flanges provided on both end surfaces of the body. The body and the flange are integrally formed of resin or the like. I am doing it. When the coil is attached to the iron core, the coil is wound around the bobbin, and the salient pole portion of the iron core is inserted into the hollow portion of the body to fix the bobbin to the iron core.

[0003]

However, in the prior art, when the model of electric equipment changes and the laminated thickness of the iron core changes, a bobbin is newly manufactured in which the length of the hollow portion corresponding to the laminated thickness of the iron core is changed. Therefore, a resin molding die for integrally molding the flange portion and the body portion is required. Therefore, there is a disadvantage in that it costs a lot to manufacture the molding die each time the model changes. SUMMARY OF THE INVENTION It is an object of the present invention to provide a coil mounting method for an electric device in which a bobbin is formed by an inexpensive bobbin molding die having a simple structure and the cost of mounting the coil on the iron core is reduced.

[0004]

In order to solve the above problems, the present invention provides a coil mounting method for an electric device in which a coil wound around a bobbin is mounted on a salient pole portion of an iron core. An end insulating portion that surrounds the end portion and the corner portion of the pole portion, and an intermediate insulating portion that covers the side surface of the convex pole portion are formed in combination, and the rotating portion of the winding machine has the same shape as the convex pole portion. A bobbin holding part is provided, the bobbin holding part is attached with the end insulating part and the intermediate insulating part to form the bobbin, a coil is wound around the bobbin, and then the tip of the salient pole part is attached to the tip of the bobbin holding part. The bobbin is abutted and moved from the bobbin holding portion to the salient pole portion.

[0005]

By the above means, the coil is wound around the bobbin consisting of the end insulating part and the intermediate insulating part attached to the bobbin holding part of the winding machine, and the tip of the salient pole of the iron core is abutted against the tip of the bobbin holding part. , The bobbin 1 is pressed toward the salient pole portion, the bobbin is transferred to the salient pole portion, and the mounting is completed. At this time, since the convex pole portion and the bobbin holding portion have the same shape, the bobbin can be transferred without being disassembled into pieces. Further, since the bobbin around which the coil is wound is formed by combining the end portion of the salient pole portion of the iron core and the end insulating portion that surrounds the corner portion of the iron core, and the intermediate insulating portion that covers the side surface of the salient pole portion. The structure of the molding die becomes simple, and even if the laminated thickness of the iron core changes due to the change of the applicable model, it can be handled simply by changing the length of the intermediate insulating part.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a working state of an embodiment of the present invention,
2 is a perspective view showing the structure of the bobbin, and FIG. 3 is a perspective view showing a state in which the coil is mounted on the iron core. Bobbin 1 is shown in FIG.
As shown in (a) and (c), both end faces 22 in the stacking direction of the salient pole portion 21 of the iron core 2 and a U-shaped portion 11a surrounding the corners thereof,
Flange portion 11b protruding vertically to both ends of the U-shaped portion 11a
2B and two intermediate insulating portions U-shaped that cover the side surface of the salient pole portion 21 and are connected to the U-shaped portion 11a and the flange portion 11b, as shown in FIG. 2B. 12
And are formed of a mold resin, and these four parts are combined and configured. When the coil 3 is attached to the salient pole portion 21 of the iron core 2, first, as shown in FIG. 1A, the tip of the rotating portion 4 of the winding machine has the same cross-sectional shape as the salient pole portion 21 of the iron core 2. A bobbin holding portion 41 is formed, and a screw hole 42 is formed at the tip.
Is provided. In addition, the end insulating portion 1 forming the bobbin 1
The bobbin retainer 43 for pressing the first and intermediate insulating portions 12 against the bobbin holding portion 41 is provided, and the bolt 44 is fixed by being screwed into the screw hole 42. Next, FIG.
As shown in (b) and (c), the two end insulating parts 11 and the two intermediate insulating parts 12 are attached to the bobbin holding part 41 so as to surround the bobbin holding part 41.
The bobbin 1 is formed by 1 and the intermediate insulating portion 12, the ring-shaped mounting groove 13 is formed, and is fixed to the bobbin holding portion 41 by the bobbin retainer 43. In this state, the coil 3 is wound into the mounting groove 13 of the bobbin 1 by rotating the rotating portion 4 of the winding machine. Next, as shown in FIG. 1D, the bobbin retainer 43 is removed, the tip of the salient pole portion 21 of the iron core 2 is abutted against the tip of the bobbin holding portion 41, and the bobbin 1 is pressed toward the salient pole portion 21. Then, as shown in FIG.
The bobbin 1 is transferred to the salient pole portion 21, and the mounting of the coil 3 is completed in the state as shown in FIG. At this time, the salient pole portion 21
Since the bobbin holding portion 41 has the same shape, the bobbin 1
Can be transferred without being disassembled into pieces. When the laminated thickness of the iron core 2 changes, the intermediate insulating portion 12
It can be dealt with only by changing the length L of. In addition,
The intermediate insulating portion 12 may be formed by bending an insulating sheet into a U-shape, or may be formed by cutting a channel-shaped insulating material into an appropriate length. In this way, since the bobbin 1 is formed by being divided into the end insulating portion 11 and the intermediate insulating portion 12 each having a simple shape, the structure of the molding die of the bobbin 1 is simplified and the intermediate insulating portion is formed even if the laminated thickness is changed. It can be handled by simply changing the length of the portion 12.

[0007]

As described above, according to the present invention, the forming die of the bobbin around which the coil is wound is simplified, and the length of the intermediate insulating portion can be reduced even when the laminated thickness of the iron core is changed. Since it can be dealt with only by changing the cost, the manufacturing cost of the bobbin molding die is reduced, and there is an effect that a coil mounting method for an electric device can be provided which reduces the cost of mounting the coil on the iron core.

[Brief description of drawings]

FIG. 1A is a front view showing a configuration of a winding machine according to an embodiment of the present invention, and FIG. 1B is a side view showing a bobbin mounted on the winding machine.
(C) A front view of the bobbin attached to the winding machine, (d),
(E) It is a front view which shows the state which equips an iron core with a bobbin.

FIG. 2 is a perspective view showing a configuration of a bobbin according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of an iron core according to an embodiment of the present invention.

[Explanation of symbols]

1 bobbin, 11 end insulating part, 12 intermediate insulating part, 2
Iron core, 21 convex pole part, 3 coil, 4 rotating part, 41
Bobbin holder, 42 screw holes, 43 Bobbin retainer, 4
4 volts,

Claims (1)

[Claims] 1. A coil mounting method for an electric device in which a coil wound around a bobbin is mounted on a salient pole portion of an iron core, wherein an end insulating portion surrounding the salient pole portion of the iron core and the corner portion of the bobbin. And a middle insulating portion that covers the side surface of the salient pole portion are formed in combination, a bobbin holding portion having the same shape as the salient pole portion is provided on the rotating portion of the winding machine, and the end portion insulation is provided on the bobbin holding portion. Part and an intermediate insulating part are attached to form the bobbin, the coil is wound around the bobbin, and then the tip of the salient pole portion is abutted against the tip of the bobbin holding portion, and the bobbin is moved from the bobbin holding portion to the salient pole portion. A method for attaching a coil to an electric device, the method comprising: