JPS6053547B2 - Manufacturing method of coil unit for iron core type armature - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION As shown in FIGS. 1 and 2, an inner cylindrical coil 11 and an outer cylindrical coil 12 formed from coil wires 1 of equal length arranged in parallel sheets are fitted together. The present invention relates to a method for manufacturing a coil unit for a coreless armature, in which the coil units of a coreless armature are assembled, and the overlapping portions are sequentially joined to form an electrically closed loop. I will try.

In order for the coil wires 1 of the inner cylindrical coil 11 and the outer cylindrical coil 12 to form one continuous closed loop as described above, it is necessary, for example, to satisfy the following conditions.

That is, the inner cylindrical coil 11 and the outer cylindrical coil 12 are made of the same number of coil wires 1, and are arranged in parallel on the cylindrical surface without overlapping each other. When mating, it is necessary that each coil wire 1 of the outer cylindrical coil 12 overlaps with each coil wire 1 of the inner cylindrical coil 11 in the radial direction at each end.

In the case where the coil wires 1 are twisted in opposite directions to form an inner cylindrical coil 11 and an outer cylindrical coil 12,
When these are combined and fitted, instead of arranging the coil wire 1 of the inner cylindrical coil 11 so that the coil wire 2 of the outer cylindrical coil 12 is point symmetrical, the coil wire 1 is placed at one end. They fit together so that they are shifted by one length.

Conventionally, in order to join the coil wires 1 that overlap in the radial direction of the inner cylindrical coil 11 and the outer cylindrical coil 12, as shown in FIG. Alternatively, as shown in FIG. 7, an auxiliary material 32 is spread between adjacent coil wires 1, and this is melted and integrated using a laser beam 50 or the like.

In this case, the heat generated during welding causes the coating 34 near the welded area to
was caused by heat, resulting in the formation of raresions. The present invention seeks to eliminate the above drawbacks.

The joining method according to the present invention will be explained below with reference to FIGS. 3 to 5.

In the present invention, the inner cylindrical coil 11 and the outer cylindrical coil 1
2 are fitted so that the coil wires 1 of each cylindrical coil overlap in the radial direction, and the coil wires 1 adjacent to each other in the circumferential direction
A cut groove 33 is provided between the coil wires 1 to separate the coil wires 1 adjacent to each other in the circumferential direction at the end face, and then the coil wires 1 adjacent to each other in the radial direction are welded using a laser beam 30 or the like.

In the embodiment shown in FIG. 3 or 4, only the coating 34 of the coil wire 1 is removed to provide a cut groove 33 between adjacent coil wires 1 in the circumferential direction. In the embodiment shown in FIG. 5, a deep cut groove 33 is provided by cutting not only the coating 34 but also the periphery of the coil wire 1. Note that the shape of the cut groove 33 is arbitrary, such as U-shape or V-shape. As described above, in the method for manufacturing a coreless coil unit according to the present invention, since the coil wires 1 adjacent to each other in the circumferential direction are separated at the end face, the coil wires 1 adjacent to each other in the radial direction are separated by laser beams, etc. Even when joining by welding, the thermal influence is less likely to extend in the circumferential direction, and the occurrence of rare shorts etc. can be prevented.

[Brief explanation of drawings]

1 to 5 are views showing one embodiment of the present invention, in which FIGS. 1 and 2 are perspective views, FIGS. 3 to 5 are perspective views of main parts, and FIG. 6 is a perspective view of the main part. and FIG. 7 are perspective views showing a conventional example of main parts.

Claims (1)

[Claims] 1. An inner cylindrical coil 11 and an outer cylindrical coil 12 formed from coil wires 1 of equal length arranged in parallel are fitted and combined so that the coil wires 1 of each cylindrical coil overlap in the radial direction, and the overlap In a method for manufacturing a coil unit for a coreless armature in which parts are successively joined to form an electrically closed loop, cut grooves are provided between coil strands 1 adjacent in the circumferential direction, and grooves are provided between adjacent coil wires 1 in the radial direction. A method for manufacturing a coil unit for a coreless armature, characterized in that coil wires 1 are joined by laser welding or the like.