JPS6321414B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a method for forming taps in a coreless armature, and more specifically, in a coreless armature formed into a cylindrical shape by so-called overlap winding, commutator connection The present invention relates to a method of forming a tap for use in a kitchen.

[Background Art] As shown in FIG. 1, in a conventional coreless armature, a winding start coil wire 3 and a winding end coil wire are connected at one end surface of a coil 1 formed by overlapping winding into a cylindrical shape. By electrically connecting the terminal portion 5 with the coil 1, the terminal portion 5 was used as one tap for commutator connection, and the remaining tap 2 for commutator connection was formed on the same end surface of the coil 1. That is, as shown in FIG. 2, with the end portions 5 of the winding start coil wire 3 and the winding end coil wire 4 twisted together, the insulation coating is peeled off and the winding start coil wire is removed at this part. 3 and the coil wire 4 at the end of winding, only the end portion 5 has a larger volume than the other taps 2, and the end surface of the coil 1 is not formed flush, resulting in poor rectification. There is a problem that the connection work to the commutator becomes difficult, and since the terminal part 5 protrudes from the end face of the coil 1, when connecting the terminal part 5 to the commutator, it is difficult to connect the coil wire at the beginning of winding. 3 and the coil wire 6 adjacent to the coil wire 4 at the end of winding, solder etc. may flow and the insulation coating may be damaged due to heating, and rare shorts are likely to occur between the terminal portion 5 and the coil wire 6 adjacent thereto. There was a problem.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to reduce the electrical connection between the coil wire at the beginning of winding and the coil wire at the end of winding. The purpose is to make the connection work between the commutator and the taps easier by finishing the taps to have the same volume as the taps formed in other parts, and by making the end faces of the coil approximately flush with each other. The purpose of this is to prevent a rare short from occurring between the coil wire at the beginning of winding, the coil wire at the end of winding, and other coil wires.

[Disclosure of the Invention] (Example) The basic shape of the coil 1 is as described above, and is formed by so-called overlapping winding of the coil wire 6 around the circumferential surface of a cylinder. That is, after winding the coil wire 6 having the insulation coating around the circumferential surface of the cylinder from one end in the axial direction to the other end so as to be inclined with respect to the axis of the cylinder, the coil wire 6 is folded back at the other end. The coil wire 6 is wound in one turn near the original position of the one end in the axial direction of the cylinder, and the coil wire 6 is further folded back so that the folded portions are sequentially circumferentially at both ends in the axial direction of the cylinder. By winding a plurality of turns in a staggered manner, a coil 1 with a winding start end and a winding end adjacent to each other is formed.
Here, the number of turns of the cylindrical coil 1 is one more than the number of turns that can be equally divided into a plurality of turns. In FIG. 3, numeral 3 denotes a coil wire at the beginning of winding, and numeral 4 denotes a coil wire at the end of winding, each of which is represented by a dotted line and a solid line to distinguish them for the sake of explanation. Terminal section 5
As shown in Figure 3, twist the pieces together once or so to prevent them from coming apart. On the end face 9 opposite to the end face 8 where the terminal portion 5 of the coil is provided, as shown in FIG.
0. Electrically coupled by ultrasonic welding or laser welding. By forming the commutator connection tap in this way, the coil wire 3 at the beginning of winding is
Both the coil wires 3 and 4 are electrically connected at the folded back portion between the coil wire 4 and the coil wire 4 at the end of winding, and in this portion, as shown in FIG. Since the wires 3 and 4 can be joined by filling the gap between the wires 3 and 4, the insulation coating of the adjacent coil wire 6 is less likely to be destroyed, and the risk of rare shorts is reduced. The remaining taps for commutator connection are formed on the same end face where the winding start coil wire 3 and the winding end coil wire 4 are electrically joined, and each tap is located at a position where the coil 1 is equally divided into a plurality of parts. It is formed by removing the insulation coating of the coil wire 6. By configuring as described above, in the coil 1, no matter which taps are energized, the winding start coil wire 3 and the winding end coil wire 4 are not energized, and the coil 1
Of the plurality of turns, one turn is not used electrically. Therefore, as described above, by winding the coil wire 6 one turn more than the number of turns that can be divided into a plurality of equal parts, the number of turns between each tap becomes equal. Furthermore, since the twisting portion of the winding start end and the winding end of the coil wire 6 is not formed on one end surface of the coil 1 where the tap is formed, and is formed substantially flush, the rectification to the tap is This makes it easier to connect children.

[Effects of the Invention] As described above, the present invention provides a method for winding a coil wire having an insulation coating around the circumferential surface of a cylinder from one end in the axial direction to the other end so as to be inclined with respect to the axis of the cylinder. , the coil wire is folded back at the other end to face the vicinity of the original position of the one end in the axial direction of the cylinder, the coil wire is wound to form one turn, and the coil wire is further folded back at both ends in the axial direction of the cylinder. By winding one turn more than the number of turns that can be equally divided into multiple parts by sequentially shifting the folded part in the circumferential direction,
A coil is formed with a winding start end and a winding end adjacent to each other, and the end portions of the winding start coil wire and winding end coil wire are twisted together, and the end face where the winding end portion is provided is aligned with the axis of the cylinder. A tap is formed by electrically connecting the coil wire at the beginning of winding and the coil wire at the end of winding on the opposite end surface, and at a position where the coil including the tap is equally divided into a plurality of parts on the same end surface. Since the insulation coating of the coil wire is removed to form multiple taps, the tap formed at the electrical connection between the coil wire at the beginning of winding and the coil wire at the end of winding is different from the taps formed at other parts. The volumes are approximately the same, and one end surface of the coil on which the tap is formed is finished substantially flush, which has the advantage of making it easier to connect the commutator and the tap. In addition, since the electrical connection between the coil wire at the beginning of winding and the coil wire at the end of winding is formed not at the part where the two wires are twisted together, but at the folded part of both wires, the electrical connection between the two wires is possible. In this case, it is sufficient to fill the gap between the two strands, and when joining the two strands or connecting the commutator to the tap, it is sufficient to fill the gap between the two strands. There is an advantage that damage to the insulation coating of the coil wire and occurrence of rare shorts is prevented.

Furthermore, the ends of the coil wire at the beginning of winding and the coil wire at the end of winding are simply twisted together, and no electrical connection is made; Since this is done only on one end, relatively troublesome work such as soldering is done only on one end face, and processes such as turning the coil upside down are necessary when forming electrical connections on the coil wire. This has the advantage of being unnecessary, resulting in high work efficiency.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional ironless core type armature, Figure 2
The figure is an enlarged front view of the terminal part of the same as above, Fig. 3 is a partially cutaway perspective view of the positional embodiment of the present invention, Fig. 4 is an enlarged front view of the terminal part of the same as above, and Fig. 5 is an electrical connection of the same as above. FIG. 3 is a coil wire at the beginning of winding, 4 is a coil wire at the end of winding, 5 is a terminal portion, 6 is a coil wire, 8 is an end surface provided with the terminal portion, and 9 is an opposite end surface.

Claims (1)

[Claims] 1. After winding a coil wire with an insulation coating around the circumferential surface of a cylinder from one end in the axial direction to the other end so as to be inclined with respect to the axis of the cylinder, the coil wire is folded back at the other end, and the coil wire is wrapped around the cylinder. The coil wire is wound in one turn near the original position of the one end in the axial direction, and the coil wire is further folded back so that the folded portions are sequentially shifted in the circumferential direction at both ends in the axial direction of the cylinder. 1 than the number of turns that can be divided equally into multiple turns
By winding many turns, a coil is formed in which the winding start end and the winding end are adjacent to each other, and the end portions of the winding start coil wire and winding end coil wire are twisted together, and the above-mentioned end portions are twisted together. A tap is formed by electrically connecting the winding start coil wire and the winding end coil wire on the end surface opposite to the provided end surface in the axial direction of the cylinder, and the coil including the tap is connected on the same end surface. 1. A method for forming taps in a coreless armature, the method comprising: forming a plurality of taps by removing the insulation coating of a coil wire at positions where the coil wire is divided into a plurality of equal parts.