JPS59123449A - Manufacture of coil unit - Google Patents

Abstract

PURPOSE:To readily and effectively bond coil strands by forming grooves between coil strands to be superposed radially of inner and outer cylindrical coils, and soldering them. CONSTITUTION:Grooves over between coil strands to be superposed radially are formed by removing adjacent insulating layers on the upper surface of coil strands 1 to be superposed radially of inner and outer cylindrical coils 11, 12. The coil strands of inner and outer cylindrical coils 11, 12 are bonded to each other by raising a solder on the upper surface of the strands 1 to be superposed radially and isolated via the grooves.

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 by coil wires 1 of equal length arranged in parallel are fitted together. The present invention relates to a method for manufacturing a coil unit used in a non-ferrous core type armature, etc., in which the overlapping portions are sequentially joined to form an electrically closed loop. do.

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

That is, the coil wires 1 forming the inner cylindrical coil 11 and the outer cylindrical coil 12 are both made of the same number and arranged in parallel on the cylindrical surface without overlapping, and the inner cylindrical coil 11 and the outer cylindrical coil 12 are When fitting, 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.

When the coil wire 1 is twisted in opposite directions to form the inner cylindrical coil 11 and the outer cylindrical coil 12, and when these are combined and fitted, the coil wire 1 of the inner cylindrical coil 11 is The coil wires 1 of the cylindrical coil 12 are not arranged so as to be point symmetrical, but are fitted so that the coil wires 1 are partially shifted from each other at the opposite end 1i.

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. This is done by melting and joining using a laser beam or the like.

However, melting the coil wires 1 and joining the coil wires 1 that overlap in the radial direction may cause a short circuit with adjacent coil wires 1, and welding each wire one by one is laborious and time consuming. There was a drawback that it took a while.

This invention aims to eliminate the above-mentioned drawbacks, and its gist is to fit an inner cylindrical coil 11 and an outer cylindrical coil 12 formed by coil wires 1 of equal length arranged in parallel. In a coil unit that forms an electrically closed loop by sequentially joining the overlapping parts, a coil radially overlaps the upper surface of the coil wire 1 that overlaps in the radial direction of the inner cylindrical coil 11 and the outer cylindrical coil 12. A groove 2 extending between the strands 1 is provided by removing an adjacent insulating layer 3, and a solder 4 is applied to the upper surface of the coil strands 1 which overlap in the radial direction and are separated by the weight 2. This is a method of manufacturing a coil unit of an iron core type armature.

The present invention will be described below based on an illustrative embodiment.

An embodiment of the present invention is shown in FIGS. 4 and 8.

A groove 2 extending between the radially overlapping coil wires 1 is provided on the upper surface of the coil wire 1 of the inner cylindrical coil 11 and the outer cylindrical coil 12 by removing the adjacent insulating layer 3.

As shown in FIG. 4, this groove 2 is provided so that the coil wire 1, which is spaced in the circumferential direction, is made independent in the radial direction.

It is provided so that the upper end portions of adjacent insulating layers are removed. This groove 2 processing can be easily performed using a mold feeding machine or the like.

The solder 4 can be easily applied to the upper surfaces of the radially overlapping coil wires J separated by the weights 2.

With the inner cylindrical coil 11 and the outer cylindrical coil 12 fitted together as shown in FIG. 5, their end faces are immersed in the solder bath 5. It is necessary to soak the solder 2 so that it does not reach the bottom of the groove 2 as shown in FIG. As long as the solder 4 enters the upper part of the groove 2, the surface tension of the solder 4 causes the dust to rise on the end face of the coil wire 1, and there is no problem. However, to reliably prevent the solder 4 from being in the groove 2, insert a synthetic resin film 6 between the grooves 2 as shown in Figure 8 when cutting the solder, and then remove the film 6 after holding the solder 4. It's good to do that. Then, the seventh
As shown in the figure, solder 4 rises to the end surface.

The raised solder 4 is removed by polishing the portion that protrudes from the upper surface of the coil wire 1 that overlaps in the radial direction, or by soaking the end surface in a corrosive solution.

In this way, as shown in FIGS. 6 and 7, on one side of the body of the inner cylindrical coil 11 and the outer cylindrical coil 12, the coil wires 1 overlap in the radial direction of the inner cylindrical coil 11 and the outer cylindrical coil 12. This allows the solder 4 to be placed on the top surface.

In this way, the coil wires 1 that overlap in the radial direction are joined.

As described above, according to the present invention, there is no need to melt the coil wire 1, so that the radial joining of the coil wires 1 of the inner cylindrical coil 11 and the outer cylindrical coil 12 is clean, and the two are bonded together. This makes joining reliable and easy.

A commutator 17 and a shaft 18 are fixed to the coil unit 1 manufactured in this manner as shown in FIG. 9, and a coreless type armature is replaced. FIG. 10 is an enlarged perspective view of part A in FIG. 9, in which the coil wire 1 and the commutator segment 19 are connected by solder 20.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1M to 10 are views showing an embodiment of the ladder invention, in which Figures 1 and 2 are perspective views, and Figure 3 is a plan view of the main parts. , Figure 4 is a perspective view of the main parts, Figures 5 to [1]
FIG. 9 is a side view of the reduced printing section, FIG. 9 is a perspective view, and FIG. 10 is a perspective view of the main part. Patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto Patent Attorney Narji Sato Patent Attorney Mikio Youse No. 1 No. 8 Figure 57゛u) No. 7 Public fL 81? r! 93rd 1'+'; 10 evil

Claims (1)

[Claims] (2) The inner cylindrical coil 11 and the outer cylindrical coil 12 formed by the coil wires 1 of equal length arranged in parallel are fitted and combined, and the overlapping parts are sequentially joined to form an electrically closed loop. In the coil unit, the insulating layer 3 adjacent to the groove 2 extending between the coil wires 1 that overlap in the radial direction is removed on the upper surface of the coil wire 1 that overlaps in the radial direction of the inner cylindrical coil 11 and the outer cylindrical coil 12. radially overlapping coil wires 1 separated by the weight 2.
A manufacturing method for a coil unit characterized by applying solder on the top surface of the coil unit.