JPS5925539A - Coil unit of coreless type armature - Google Patents

Abstract

PURPOSE:To joint the stacking section of an inner cylinder coil and an outer cylinder coil easily by stretching a combining material formed through coating with a low melting-point metal to the stacking-up section. CONSTITUTION:The inner cylinder coil 11 and the outer cylinder coil 12 formed by coil strands of equal length arranged in parallel are fitted, and combined so that the coil strands are stacked in the radial direction. The combining material 32 is stretched over the coil strands stacked in the radial direction. The combining material 32 uses aluminum, copper or these alloy as a core, and a material in which the core is coated with the low melting-point metal 33 consisting of a brazing material, such as solder, tin or the like or a low melting-point alloy, such as tin, antimony, etc. is used. Laser beams 34 are irradiated to the combining material 32, and the combining material 32 is combined with the coil strands.

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 aims to provide a method for manufacturing a coil unit of an ironless core type armature in which an electrically closed loop is formed by sequentially joining the overlapping parts.

In addition, in order for the coil wires 1 of the inner cylindrical coil 11 and the outer cylindrical coil 12 to form a closed loop in one continuous electric motor as described above, the following conditions must be met, even if the It is.

, to fit in parallel on the cylindrical surface without overlapping,
Also, when fitting the inner cylindrical coil 11 and the outer cylindrical coil 12, the outer cylindrical coil 12 is inserted in the radial direction at each end.
Each coil wire 1 of the inner cylindrical coil 11 is
Corresponding to the polymerizing force (necessary).

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 Jl/12 are not arranged so as to be point symmetrical, but are fitted so that the coil wires 1 are shifted by one wire at the -hm section.

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, it is necessary to melt the coil wires 1 and join the coil wires 1 that overlap in the radial direction quickly with a small amount of energy. There is a risk that not only the coil wire 1 but also the coil wire 1 may be melted, resulting in a short circuit with the adjacent coil wire 1, and this welding is laborious and time consuming.

This invention aims to eliminate the above 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. and put a bonding material 32 in the overlapping part.
A coil unit of a non-ferrous core type armature, which is formed by covering a bonding material 32 with a low melting point metal 33, in a coil unit which is sequentially joined by passing it around to form an electrically closed loop. .

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

An embodiment of the present invention is shown in FIGS. 4 to 9.

First, 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 so that the coil wires 1 overlap in the radial direction.A radially overlapping coil is formed. A bonding material 32 is spread over the wire 1.

As shown in FIG. 5, the bonding material 32 used is a core material made of aluminum, copper, or an alloy thereof, coated with a low melting point metal 33 made of a solder material such as solder, tin, or a low melting point alloy such as tin or antimony. .

The bonding material 32 is bonded to the coil wire 1 by irradiating the bonding material 32 with a laser beam 34. The energy of the laser beam may be lower than that of conventional laser beams. This is because there is no need to melt the core material that performs the electrical conduction function, and it is only necessary to melt the low melting point metal 33 and join it to the coil wire 1.

In this way, as shown in the seventh figure, the inner cylindrical coil 11
and the end face of the outer cylindrical coil 12, the inner cylindrical coil 11
The bonding material 32 is applied between the radially overlapping coil wires 1 on the upper surface of the radially overlapping coil wires 1 of the outer cylindrical coil 12, and the bonding can be easily performed.

As described above, according to the present invention, since there is no need to melt the core material that is bonded to the coil wire 1 and performs an electrically conductive function, the bonding material 32 can be bonded with small energy, and the cylindrical coil 11 and The radial overlap of the coil fibers 1 of the outer cylindrical coil 12 is clean, and the two can be joined reliably and easily.

A commutator 17 and a shaft 18 are fixed to this coil unit 16 as shown in FIG. 8 to obtain an ironless core type armature 7. FIG. 9 is an enlarged perspective view of section A in FIG. 8, in which the coil wire 1 and the commutator segment 19 are connected with solder 20.

[Brief explanation of the drawing]

1 to 3 are views showing conventional examples of the present invention, in which FIGS. 1 and 2 are perspective views, FIG. 3 is a sectional view of the main parts, and FIGS. 4 to 9. The figures show one embodiment of the present invention; FIGS. 4 and 5 are perspective views of the main parts, FIG. 6 is a sectional view of the main parts, and FIGS. 7 and 8 are Perspective view, No. 9
This figure is a perspective view of section A in FIG. 8. Patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto Patent Attorney Shigeji Sato Patent Attorney Mikio Kawase Figure 1 Figure 2 Figure 4 Figure 5 Figure 7 Figure 1 Figure 9 2 1 Figure 7 19 \ \ ■

Claims (1)

[Claims] 1), 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 bonding material 32 is spread over the overlapping part to sequentially join them. A coil unit of an ironless core type armature forming an electrically closed loop, characterized in that the coil unit is formed by covering a bonding material 32 with a low melting point metal 33.