JPS58172966A - Coreless armature - Google Patents

Abstract

PURPOSE:To rapidly and readily perform by a welding work by laser beams at the end of a unit coil by inserting and positioning an auxiliary welding wire between cables. CONSTITUTION:An inside wedge-shaped spacer 9 is continuously press-fitted along the longitudinal direction of strands 3a' between adjacent strands 3a' and 3a' at a suitable position of a cylinder 3' in the coil in the state that the end of the wedge shape is directed toward the central axis, thereby pressing and positioning the strands 3a... in the peripheral direction. Further, an outside wedge- shaped spacer 10 is continuously press-fitted along the longitudinal direction of strands 5a' between adjacent strands 5a' and 5a' at a suitable position of a cylinder 5' in the coil in the state that the end of wedge shape is beared to the central shaft of the coil, thereby pressing and positioning the strands 5a'... toward the peripheral direction. A jumper wire 7' is bridged over between the corresponding strands 3a' and 5a' at the end face of the unit coil 6', and welded at both ends by laser beams.

Description

[Detailed description of the invention] This invention relates to a ironless core armature.

As shown in Fig. 1, conventional iron-free core armatures are produced by placing a wire sheet 1 in which a large number of wires are arranged in a mutually insulating state in parallel, and placing them on a core body 2 in the direction of arrow A and ζ. The coil inner cylinder 3 is formed by winding the inner wire, and as shown in FIG.
The JI! A unit coil 6 shown in FIG. 3 is formed. At both end surfaces of this unit coil 60, as shown in FIG.
Cross the jumper wire 7 between the corresponding strands 3si and 5 m, and connect both ends of the jumper wire 7 to each corresponding strand 3si. l, by laser welding to 5m.

These jumper wires 7 and all the wires 3 of the coil inner and outer cylinders 3.5
A ironless core armature having one closed loop electric circuit is formed between m and 5a.

However, as shown in FIG.
(5m) is wound in a spiral shape, a gap 8 is created at the outer periphery, and when one strand 3a is tilted with respect to the radial direction, the other strands 3a are also tilted in a chain shape as shown in Fig. 4. Then, the size of the gap 8 becomes uneven, and the corresponding plans of the inner and outer cylinders 3.5 of both coils @ 3 a and 5 a shift in the circumferential direction. As a result, it becomes difficult to place the jumper wire 7 between the corresponding element wires 3a and 5a and perform laser welding.In addition, if the corresponding plans @3a and 5g deviate greatly in the circumferential direction, the corresponding element @3b , 5b has a problem in that the jumper wire 7a, which is passed between the wires 3b and 5b, comes into contact with the corresponding wire 3b and the adjacent wire 3c, resulting in a short circuit.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a coreless armature that facilitates welding of jumper wires and prevents short-circuits.

An embodiment of the present invention will be described with reference to FIGS. 6 to 9. That is, as shown in FIGS. 6 and 7, this iron-free core armature has adjacent elements at appropriate positions in the coil inner cylinder 3'. Place the inner wedge-shaped spacer 9 between 13a' and 3a', and insert the strand 3 with the tip of the wedge facing the coil center axis.
By continuously press-fitting along the longitudinal direction of m',
While suppressing and positioning each strand 3a' in the circumferential direction, adjacent strands S a ' at appropriate positions of the coil outer cylinder 5'
+ 5 a' by continuously press-fitting the outer wedge-shaped spacer 10 along the longitudinal direction of the strand 5 m' with the wedge tip facing the coil center axis.
a'...The corresponding strands 3a' and 51' of both coil inner and outer cylinders 3' and 5' are arranged to face each other in the radial direction on the end face of the unit coil 6' by suppressing positioning in the entire circumferential direction, and the unit coil 6 'Each corresponding strand 3m', 5a at the end face
A jumper @7' is placed in between and both ends of jumper wire 7' are connected to the corresponding wire 3a'.

5a' respectively by laser welding.

Other configurations are similar to the conventional example.

During manufacturing, as shown in FIG.
' is spirally wound around a core metal body 2' to form a coil inner cylinder 3', a plurality of inner spacers 9 shown in FIG. When press-fitting into the wire sheet 1 by the roller 11 and similarly winding another wire sheet around the coil inner cylinder 3' in a spiral shape in the opposite direction to form the coil outer cylinder 5',
The outer wedge-shaped spacer 10 is similarly press-fitted into the wire sheet using the roller 11, and the inner and outer cylinders 3' and 5' of the thus formed coils are separated in the axial direction to form a unit coil 6' shown in FIG. Thereafter, each corresponding strand 3a' is attached to the end face of the unit coil 6' in the same manner as in the conventional method.

A Nishampa wire 7' is passed between the wires 5a' and welded using a laser to complete the ironless core armature.

In this way, the inner wedge-shaped spacer 9 and the outer wedge-shaped spacer 1o were press-fitted between the adjacent strands 3a'+3a' and 5a', 5a' at appropriate positions of the inner and outer cylinders 3' and 5' of both coils. Wires 3a'... and 5a
' - There is no gap between them, and each of the corresponding strands 3a', 5a1 is placed exactly opposite to each other in the coil radial direction on the end face of the unit coil 6', so that each of the corresponding strands 3m', Jumper wire 7' can be placed between 5a' and its both ends can be easily welded by laser, and the corresponding strand 3m' that jumper wire 7' is welded can be easily welded by laser.
, 5a' will not come into contact with the adjacent strands 3a't or 5a', and the occurrence of short circuits can also be prevented.

Note that laser welding is facilitated by using an optical fiber. This ironless core armature can be used, for example, in the motor of an electric shaver.

As described above, the iron-core armature of the present invention has a coil inner cylinder formed by winding a wire sheet in which a large number of wires are arranged in a mutually insulated state in a spiral shape, and other wires are arranged on the outer peripheral surface of the coil inner cylinder. A unit coil is formed by winding a sheet in a spiral shape in the opposite direction to form a coil outer cylinder, and the inner and outer cylinders are separated in the axial direction, and the inner coil cylinder is positioned at an appropriate position with the wedge tip facing the center axis of the unit coil. An inner wedge-shaped spacer press-fits each strand in the circumferential direction by continuously press-fitting it into adjacent strands along the longitudinal direction of the strands, and an inner wedge-shaped spacer press-fits each strand in the circumferential direction between adjacent strands. By continuously press-fitting the wires into adjacent wires at appropriate positions along the longitudinal direction of the cylinder, each wire is pressed and positioned in the circumferential direction, and the corresponding wires for forming a closed loop between the inner and outer cylinders of both coils are attached to the end face of the unit coil. and a plurality of jumper wires whose ends are welded along the end face of the unit coil to the corresponding strands of the inner and outer cylinders of both coils, making it easy to weld the jumper wires. It has the advantage of being easy to work with and preventing seals.

Next, we will disclose a iron-free core armature that can prevent sheet and performance deterioration and is easy to manufacture. In the conventional ironless core armature, as shown in Figs. 10 and 11, when electrically connecting the corresponding strands 38° 5a of the inner and outer cylinders 3.5 of both coils, the jumper wire 7 for welding is connected to the unit coil. 6 and welded with a laser 12 or the like. However,
In this method, the jumper wires 7 had to be positioned and sectioned one by one, making manufacturing complicated. In addition, since the element @3a (5 heat) extends in a spiral shape diagonally with respect to the axial direction of the unit coil 6, the element wire 3m (5a)
The insulation film 13 at the thinner part of the wire was affected by the heat of the laser 12, and there was a risk that it would form a lacy sheet with the adjacent strand 3a. Furthermore, the vertical and horizontal ratio a/b of the end face of the strand 3a
When it gets bigger (vertical), it melts! ! The disadvantage is that the area becomes small, sufficient resistance cannot be obtained, and the characteristics deteriorate.

The disclosed example described below solves the above-mentioned drawbacks by arranging the strands 3a and 5 of the unit coil 6 near the end face parallel to the coil axis direction, as shown in Figures 1g12 and 13. A gap is formed between the adjacent strands 3++, 3m and 5a'', 5a'', a welding auxiliary material 14 is inserted into this gap, and spot or seam welding is performed using a laser 15 or the like. In this case, the wire coating 16 on the side where the welding auxiliary material 14 is melted is the wire sheet 1' shown in FIG.
is peeled off before being spirally wound around the core metal body 2'. The method for inserting the welding auxiliary material 14 is as shown in FIG. 15
As shown in the figure, another wire sheet 4' is wound around the outer peripheral surface of the coil inner cylinder 3' in opposite directions alternately in a spiral shape and in a linear shape to form a coil outer cylinder 5'. As shown in the figure, press fit the welding member ]4 into the gaps between each of the wires 3a', 3a' and 5a', 5a' in the straight parts of the inner and outer cylinders 3'+5# of both coils, and weld them along the dashed line 17. By cutting, a unit coil 6' shown in FIG. 917 is formed.

In this way, on the end face of the unit coil 6', the welding auxiliary wire 14 is connected to the strands 3a'+3a' and 5a', 5a.
Since the wires 3a' and 5a' stand up parallel to the coil axis near the end face of the coil, the heat of the laser 15 is removed. Due to this effect, there is no chance of the rarity of the adjacent strands 3m' or 5m being affected.Furthermore, even if the end faces of strands 3a and 5m become vertically long, the welding auxiliary material 14 and the corresponding strands 3a'+5
a' can be reliably welded, and deterioration of the characteristics of the ironless core armature can also be prevented.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a wire sheet wound spirally around a metal core, Figure 2 is a perspective view of another wire sheet spirally wound in the opposite direction, and Figure 3 is a unit coil. A perspective view, FIG. 4 is an enlarged view of the main part of the end face, FIG. A plan view of the main part of the inner cylinder of the coil, FIG. 8 is a perspective view showing the process of expanding the inner spacer to the wire sheet, and FIG. 9 is a cross-sectional view of the inner spacer.
0 to 17 are explanatory diagrams of disclosed examples. 1' wire sheet, 3' ・coil inner cylinder, 3a',
5a'・＠纏, 5'--1 Outer cylinder, 6' Unit coil, 7' Jumper wire, 9 Inner wedge-shaped spacer, 1° outer wedge-shaped spacer Fig. 10 Fig. 12 a Fig. 11 Figure 13

Claims (1)

[Claims] A large number of strands of strands are arranged in parallel in an insulated state, and a next sheet is spirally wound to form an inner cylinder.A coil outer cylinder is formed by winding another strand sheet spirally in the opposite direction around the outer circumferential surface of the inner cylinder. A unit coil is formed by dividing both the inner and outer cylinders in the axial direction, and the lI tangent line is continuous along the longitudinal direction of the strand at an appropriate position of the inner cylinder with the wedge tip facing the unit coil central axis. Next to the appropriate position of the inner wedge-shaped spacer, which presses and positions each strand in the circumferential direction by press-fitting it, and the outer cylinder of the coil with the wedge tip facing the center axis of the unit coil! ! By continuously press-fitting between the strands along the longitudinal direction of the strands, each strand is compressed and positioned in the circumferential direction, and the corresponding strands for forming a closed loop of the inner and outer cylinders of the Aya coil are arranged radially opposite each other on the end face of the unit coil. An ironless core armature comprising: an outer wedge-shaped spacer; and a plurality of jump wires having both ends welded along the end face of the unit coil to corresponding strands of the inner and outer cylinders of both coils, respectively.