JPS59117437A - Field coil structure - Google Patents

Abstract

PURPOSE:To prevent the corner of a pole core and the inside of an edgewise winding coil from grounding due to their scratches by disposing an elastic stator made of an insulator between the edgewise winding coil and the pole core. CONSTITUTION:A pole core 4 is inserted into an edgewise winding coil 1a made of an insulating coating or insulator coated wire through an elastic stator 6 formed with H-shaped slit 5a. Thus, when the caulked part 4a of the pole core 4 is caulked fixedly to a yoke 5, the middle part 6b of the stator 6 is gradually overturned to the inside of the coil 1a by the corner 4b of the core 4, thereby preventing the corner 4b of the core 4 and the inside of the coil 1a from grounding due to their scratches.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in field coil structures used in starter motors and the like.

Conventionally, this type of flat wound field coil is made by interposing a flat wound coil 1 with interlayer paper 2, insulating the whole with cotton tape 3, and caulking it to a yoke 5 with a ball core 4, as shown in FIG. It was fixed by caulking with the portion 4a.

However, this conventional method has the disadvantage that production efficiency is reduced due to the cotton taping work and the interlayer paper insertion work.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and obtain a flat wound field coil structure with good production efficiency. By arranging an elastic fixing body using the body and fixing the ball core to the yoke, the flat winding coil is fixed by the elastic saw of the elastic fixing body.The most distinctive feature of the present invention is that By making a slit in the elastic fixing body made of rubber material, etc., when inserting the ball core into the flat wound coil, the middle part of the elastic fixing body is prevented from being grounded due to damage between a part of the corner of the ball core and the inside of the flat wound coil. This can be prevented by This eliminates the need for cotton taping or inserting paper between the eyebrows.
Increase production efficiency.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 shows an embodiment of the present invention, in which a flat wound coil 1a made of an insulating coated wire or an insulating material coated wire is connected to a caulking portion 4a of a ball core 4 via an elastic fixing body 6 made of a rubber plate. By caulking, the hand-hammered coil 1a is fixed to the inner peripheral surface of the cork 5.

FIG. 3 shows the shape of the elastic fixing body 6, and 6a indicates an H-shaped slit formed in the middle portion 6b of the elastic fixing body 6. FIG. 4 shows the assembly situation, and shows that the corner portion 4b of the ball core 4 prevents damage to the insulation coating of the flat wound coil 1a and the insulating member, while the intermediate portion 6 of the elastic fixed body 6
This shows what is possible by folding b.

In the above structure, the ball core 4 is inserted into the flat wound coil la made of an insulating coated wire or an insulating material coated wire via an elastic fixing body 6 formed with an H-shaped slit 6a shown in FIG. 5 is the caulking part 4 of the ball core 4
When fixing by caulking, as shown in FIG. Grounding due to damage between the corner portion 4b and the inside of the flat wound coil 1a can be prevented, and the flat wound coil 1a can be easily fixed to the yoke 5 via the ball core 4 as shown in FIG. In addition, since the elastic fixing body 6 is set to be compressed and fixed between the tip 4C of the ball core 4 and the flat wound coil 1a in the fixed state shown in FIG. 2, its compressive elastic force causes The flat wound coil 1a is fixed.

By configuring as described above, it is possible to greatly improve the production capacity of coils, instead of hand-pulling, which conventionally required taping with glabella paper and cotton tape, which had poor production efficiency, and to provide an inexpensive flat-wound coil structure. This has an excellent effect.

In the above embodiment, the ball core 4 and the yoke 5 are fixed by caulking, but it is also possible to fix the ball core 4 and the yoke 5 by screwing or welding.

Moreover, the shape of the elastic solid 6 is not limited to the H-shape, but also has the shape of the corner 4b of the ball core 4 and the flat percussion coil 1.
If the slit shape can prevent damage to the ground with a,
Any shape is possible. For example, the shape of the slit 6a as shown in FIG. 5 may be used.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a conventional structure, FIG. 2 is a vertical cross-sectional view showing an embodiment of the structure of the present invention, FIG. 3 is a front view showing an elastic fixing body in the structure shown in FIG. 2, and FIG. 2 is a longitudinal sectional view showing the assembled state of the structure shown in FIG. 2, and FIG. 5 is a front view showing another embodiment of the elastic fixing body. 1a...Flat wound coil, 4...Ball core, 4b
...corner part, 5...yoke, 6...elastic fixed body, 6b...middle part. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] In a field coil structure in which a flat wound coil coated with insulation or an insulating material is fixed to a yoke via a ball core, the ball core is inserted into the flat wound coil, and the ball core is inserted inside the flat wound coil. A field coil structure in which an elastic fixing body made of an insulator having a slit is disposed between the ball core and the hand-wound coil.