JPH0353575Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a coreless armature used in a so-called coreless motor.

[Background Art] In this type of coreless armature, as shown in FIG. The wire sheets 2 are arranged in a cylindrical shape with gaps 6 between them, and each coil wire sheet 2 is twisted in one direction leaving both ends intact to form an inner cylinder 3, and then twisted in the same way in the opposite direction. The outer cylinder 4 is formed by twisting the outer cylinder 4 in the direction shown in FIG. 5) to form a wave-wound coil.

By the way, in the above-mentioned wave-wound coil, as shown in FIG. 2c, it is sufficient to simply join the coil wires 1 of the corresponding inner and outer cylinders 3 and 4 to each other by laser welding at one end, but the same is required at the other end. As shown in FIG. d, it was necessary to perform the feed connection using the auxiliary conductor plate 7, and the welding had to be carried out while holding the auxiliary conductor plate 7, making the work extremely troublesome.

By the way, Japanese Utility Model Application Publication No. 58-66844 proposes a method in which the ends of a pair of corresponding coil wires are bent and soldered to a conductor portion formed on a commutator. If used, it is possible to eliminate the need for a feed connection using the auxiliary conductor plate 7.

However, the structure disclosed in Japanese Utility Model Application Publication No. 58-66844 has a problem in that the bending direction is not stable when the ends of the coil wire are soldered, detracting from the aesthetic appearance of the finished product.

[Purpose of the invention] The present invention was devised in view of the above-mentioned problems, and it connects the commutator and the coil using the above-mentioned feed connection, and simplifies the work by omitting the auxiliary conductor plate. , and to stabilize the bending direction of the extending portion of the feeding connection coil wire.

[Disclosure of the invention] Accordingly, the present invention has a structure in which a plurality of coil wires 1 are overlapped to form a feed connection coil wire 1a in which one of the outermost coil wires 1 is made longer than the other coil wires 1. A plurality of coil wire sheets 2 formed by pasting are arranged in a cylindrical shape with a gap larger than the width of at least one coil wire 1 between them, and each An inner cylinder 3 formed by twisting a coil wire sheet 2 in one direction, and a coil wire 1 for feeding connection.
The outer cylinder 4 is formed by arranging a plurality of coil wire sheets 2 in a cylindrical shape in the same way as the inner cylinder 3 and twisting them in the opposite direction, with a on the opposite side of the inner cylinder 3. Align the position of the feeding connection coil wire 1a of each coil wire sheet 2 of No. 4 with the gap position of the inner cylinder 3.
The inner and outer cylinders 3, 4 are polymerized into layers, and the inner and outer cylinders 3, 4 are formed at the end surfaces of the inner and outer cylinders 3, 4.
A wave-wound coil 10 is formed by welding the four coil wires 1 to each other, and by bending the extending portion of the feeding connection coil wire 1a inward and welding it to the segment 9 of the commutator 8. It is characterized by points.

In the embodiment shown in FIG. 1, the coil wire sheet 2 is made by stacking and bonding a plurality of coil wires 1 each having an insulating coating in order to improve workability. Only the strands 1a are formed in advance to be longer than the other coil strands 1 at one end 2b of the coil strands 2. Next, a process of arranging a plurality of coil wire sheets 2 in a cylindrical shape and twisting them in a spiral shape, and reversing the twisting directions to form an inner cylinder 3 and an outer cylinder 4, and forming the inner and outer cylinders 3 and 4. Coil wire 1 that corresponds to overlapping
The process of welding them together is almost the same as the conventional example shown in FIG. 2, but in the present invention, the feeding connection coil wires 1a are positioned on opposite sides of the coil wire sheet 2 in the inner cylinder 3 and outer cylinder 4. . Therefore, when the inner and outer cylinders are overlapped, as shown in Fig. 1b,
The feeding connection coil wires 1a of the adjacent inner cylinder 3 and outer cylinder 4 face each other with a gap 6 in between. Extending portion A of this feeding connection coil wire 1a
is bent inward as shown in FIG. 1c and welded to the segment 9 of the commutator 8. Note that this feeding connection coil wire 1a is bent so as to be flush with the end surfaces of the inner and outer cylinders 3 and 4.

[Effects of the invention] As mentioned above, in the present invention, one of the outermost coil wires is made longer than the other coil wires, and a plurality of coil wires are overlapped to serve as a sending and connecting coil wire. A plurality of coil wire sheets formed by pasting are arranged in a cylindrical shape with a gap larger than the width of at least one coil wire between each sheet, and each coil wire is separated by leaving both ends. An inner cylinder is formed by twisting a sheet in one direction, and a plurality of coil wire sheets are arranged in a cylindrical shape in the same way as the inner cylinder, with the coil wire for feed connection on the opposite side to the inner cylinder, and the coil wire is arranged in the opposite direction. It consists of an outer cylinder formed by twisting the outer cylinder, and the position of the coil wire for feeding connection of each coil wire sheet of the outer cylinder is aligned with the gap position of the inner cylinder, and the coil wires are superposed in two layers, and the end faces of the inner and outer cylinders are The coil wires of the inner and outer cylinders are welded to each other, and the extended portion of the coil wire for feeding connection is bent inward and welded to the commutator segments to form a wave-wound coil. There is an advantage that the connection work can be simplified without requiring a separate auxiliary conductor plate for feed connection and wiring for connection to the commutator. In addition, since the position of the feeding connection coil wire of each coil wire sheet of the outer cylinder is aligned with the gap position of the inner cylinder and superimposed in two layers, the extending portion of the feeding connection coil wire is inward. When bending, the gap in the inner cylinder acts as a guide, stabilizing the bending direction of the feed connection coil wire, making positioning with the commutator segments easier, and improving the appearance of the finished product. There is.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, in which a is a perspective view of a coil wire sheet, b and c are perspective views of essential parts showing the assembled state of the coil, and Fig. 2 is a conventional example. , a is a perspective view of the coil wire sheet, b
1 is a perspective view showing the manufacturing process of the coil, and c and d are perspective views showing the connection state between the coil wire sheets. 1 is a coil wire, 1a is a coil wire for feeding connection, 2 is a coil wire sheet, 2a and 2b are the ends of the coil wire sheet, 3 is an inner cylinder, 4 is an outer cylinder, 5
is the laser welded part, 6 is the gap, 7 is the auxiliary conductor plate, 8
9 is a commutator, 9 is a segment, 10 is a coil, and A is an extension part.

Claims (1)

[Scope of utility model registration request] A plurality of coil wire sheets formed by stacking and pasting multiple coil wires, one outermost coil wire being longer than the other coil wires and used as a coil wire for feeding and connection. are arranged in a cylindrical shape with a gap larger than the width of at least one coil wire between them, and each coil wire sheet is twisted in one direction leaving both ends intact. An outer cylinder is formed by arranging a plurality of coil wire sheets in a cylindrical shape in the same way as the inner cylinder and twisting them in the opposite direction, with the connecting coil wire on the opposite side of the inner cylinder. The position of the coil wire for feeding connection of each coil wire sheet is aligned with the gap position of the inner cylinder, and the coil wires of the inner and outer cylinders are welded to each other at the end faces of the inner and outer cylinders, and the coil wires of the inner and outer cylinders are welded together, and the feeding connection is made. A coreless armature comprising a wave-wound coil formed by bending an extended portion of a coil wire inward and welding it to a commutator segment.