JPS59201655A - Manufacture of coreless armature - Google Patents

Abstract

PURPOSE:To eliminate a layer shortcircuit malfunction by mounting a connecting tool in a floated state, and connecting the ends of strands of an inner cylindrical coil to that of strands of an outer cylindrical coil. CONSTITUTION:The end faces of inner and outer cylindrical coils 1, 2 are disposed in a zigzag stepwise manner, and extended toward the central direction of the coils in the state that the end 6 of the strands of the coil 2 is floated from an auxiliary welding wire 7 for the outer cylinder. An auxiliary welding wire 8 for the inner cylinder is extended toward the central direction of the coil from the end 5 of the strands of the coil 1, the end of the wire 7 is bent downward, and the end of the wire 8 is bent upward, thereby spot welding them by a laser or the like.

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a method for manufacturing a coreless armature.

[Background technology]

Generally, ironless core type armatures are manufactured in the following manner. That is, a spiral inner cylindrical coil (the first
Figure) 1 constitutes the outer cylindrical coil 2 (the second Figure) and the third
A coil unit 3 as shown in the figure is constructed. Then,
The end of the coil wire of the inner cylindrical coil 1 and the end of the coil wire of the outer cylindrical coil 2 are shown on both end surfaces of the cylinder in FIG. 4 (an enlarged plan view of the circled part A in FIG. 3). As shown, an auxiliary welding wire 4 is used, and its both ends are joined to the end 5 of the coil wire of the inner cylinder coil 1 and the end 6 of the coil wire of the outer cylinder coil 2 by laser welding or the like, and electrically connected. It is manufactured by forming a closed loop with a commutator and a shaft (not shown). However, when manufacturing in this manner, the end 5 of the coil wire of the inner cylindrical coil 1 and the end 6 of the coil wire of the outer cylindrical coil 2 do not properly correspond to each other on the end surface of the coil unit 3. As shown in FIG. 5, a phenomenon of displacement in the circumferential direction occurs. In such a case, the welding auxiliary wire 4 will be attached obliquely, causing a problem in that it will come into contact with the end portion 6 of the adjacent coil wire (point X in the figure) and cause a layer short defect.

[Purpose of the invention]

The purpose of this invention is to prevent the occurrence of rare short defects.
That is.

[Disclosure of the invention]

In this invention, a spiral-shaped outer cylinder whose twist direction of the coil wires is opposite to that of the inner cylinder coil is attached to the outer periphery of a spiral inner cylinder coil having a structure in which a plurality of coil wires are twisted on a cylindrical surface. A ironless core type that forms a coil and connects the end of the coil wire of the inner cylinder coil and the corresponding end of the coil wire of the outer cylinder coil at both the upper and lower end surfaces of the cylinder to form an electrically closed loop. A method for manufacturing an armature, in which the end of the coil wire of the inner cylinder coil and the end of the coil wire of the outer cylinder coil are connected by lifting a connecting tool from the end of the coil wire of the inner cylinder coil. The feature of this method is that it is carried out by stretching the coil wire of the outer cylindrical coil with the ends of the coil wire.

In other words, by attaching the connector in a pointed state and connecting the end of the coil wire of the inner cylinder coil and the end of the coil wire of the outer cylinder coil, the adjacent Contact with the ends of the coil wires does not occur, and occurrence of layer short defects is prevented.

Next, the present invention will be explained in detail based on examples.

FIG. 6 is a partial perspective view of a coil unit used in one embodiment of the present invention, and FIG. 7 is a partial side sectional view thereof. That is, in this coil unit, the inner cylindrical coil 1 is moved downward, the end face of the inner cylindrical coil 1 and the end face of the outer cylindrical coil 2 are made in a step-like manner, and the end face of the coil wire of the outer cylindrical coil 2 is moved outward from the end 6 of the coil wire of the outer cylindrical coil 2. The auxiliary welding wire 7 for the cylinder is extended toward the center of the coil in a floating state, and the auxiliary welding wire 8 for the inner cylinder is extended toward the center of the coil from the end 5 of the coil wire of the inner cylindrical coil l. The tip of the welding auxiliary line 7 is bent downward as shown in Fig. 8 (a view of Fig. 6 viewed from above), and the tip of the welding auxiliary line 8 for the inner cylinder is bent upward and spot welded using a laser or the like. It is configured as follows.

In FIGS. 6 to 8, the black areas are spot welding points. Note that a coreless armature can be obtained by attaching a commutator and a shaft to this coil unit in the usual manner.

In this way, in this coil unit, the end face of the inner cylinder coil 1 and the end face of the outer cylinder coil 2 are stepped, and the welding auxiliary line 7 for the outer cylinder is extended to the welding auxiliary line 8 for the inner cylinder in a floating state. Therefore, even when the ends 5 and 6 of the coil wires of the inner cylindrical coil 1 and the outer cylindrical coil 2 do not correspond properly as shown in FIG. No contact.

Therefore, there is no possibility of rare short-circuiting. In addition, the welding auxiliary line 7 for the outer cylinder is bent diagonally downward, and the auxiliary welding line 8 for the inner cylinder is
By connecting to the coil wire, the inclination angle α of the coil wire can be increased from the state shown in FIG. 9 (conventional example) to the state shown in FIG. 10, thereby achieving the effect of improving torque generation efficiency.

The coil unit shown in FIG. 11 uses one welding auxiliary line 9 instead of two welding auxiliary lines. Other than that, it is the same as the one in FIG. 6, and the operation and effect are also the same.

FIG. 12 is a perspective view of a connecting ring of a coil unit used in another embodiment of the present invention, and FIG. 13 is a sectional view thereof.
FIG. 14 is an enlarged perspective view of the circled portion B in FIG. 12. That is, this connection ring includes an outer cylindrical coil ring 11 having a supporting protrusion 10 on its inner circumferential surface, and an inner cylindrical coil having a stepped portion corresponding to the supporting protruding part 10 of this outer cylindrical coil ring 11 on its outer circumferential surface. As shown in FIG. Conductor parts (copper) 13 and insulating parts 14 are provided alternately in the direction, and as shown in FIG. Align the conductive part 13 of the inner cylinder coil ring 12 with the end face of the inner cylinder coil 1 with the end part 6 of the coil wire of the inner cylinder coil 1. It will be placed in the same condition.

If the end 6 of the coil wire of the outer cylindrical coil 2 and the end 5 of the coil wire of the inner cylindrical coil l are misaligned, turn the rings 11 and 12 in the circumferential direction by the amount of the misalignment. After correction, the Y point shown in FIG. 16 is laser welded and fixed in this state. The ironless core type armature can be obtained by attaching a commutator and a shaft to the coil unit thus produced.

By using the connecting ring in this manner, the end misalignment of the coil wires of the outer cylindrical coil 2 and the inner cylindrical coil 1 can be easily corrected, and furthermore, a layer short-circuit failure can be prevented.

〔Effect of the invention〕

Since the present invention manufactures a coreless armature as described above, it is possible to prevent the occurrence of layer short defects.

In addition, as shown in FIG. 17, when manufacturing a coil unit consisting of an inner cylinder coil 1 and an outer cylinder coil 2, the inner cylinder coil 1
and the outer cylindrical coil 2 are made separately and the pitch of the coil wires changes, so as shown in FIG. As described above, the end 6 of the wire may be misaligned, making it difficult to connect the ends 5 and 6. In order to solve this problem, one type of coil sheet (consisting of multiple coil wires arranged in parallel) is used to wrap the outer cylindrical coil 2a around the same core material.
(Fig. 19a) and the inner cylindrical coil 1a (Fig. 19b) are made. In this case, the outer and inner diameters of the outer cylindrical coil 2a and the inner cylindrical coil 1a are the same. However, as shown in FIG. 20, the outer diameter of the coil wire includes the thickness of the insulating coating 20/1 and the thickness of the fusion coating 21 -12.
1 melts and protrudes when it is heated and pressurized, so that the outer diameter of the coil wire can be reduced by the amount that the fusion coating 21 protrudes. Therefore, when the inner cylindrical coil 1a is heated and pressurized, the inner and outer diameters of the entire coil become smaller as shown in FIG. become. At this time, it is sufficient to set φD2 (-φdl)-φD1-2t π×(φD1-φD2)≦n (number of turns)X2/2. By doing so, it becomes possible to obtain the inner and outer cylindrical coils la and 2a with the same pitch accuracy, and it becomes possible to eliminate misalignment between the ends of the coil wires of the inner and outer cylindrical coils la and 2a.

Further, as shown in Fig. 22, the coil sheet is made by arranging a plurality of coil wires λ in parallel and pressing them from the side while heating, but the coil wire 3 is made as shown in Fig. 23. , since there are an insulating coating 20 and a fusion coating 21 on both sides of the coil wire 3, when pre-aligned as shown in FIG.
The copper wires a' are lined up with the two fusion coatings 21 in between, resulting in an accumulated pitch error. In addition, the coil wire 1
It is difficult to uniformly provide the fusion film 21 on both sides, and this also causes cumulative pitch errors. Sogode, 24th
As shown in the figure, when the fusion film 21 on one side is removed, when the coil sheet is made, the copper wire 3' of the coil wire has one fusion film 21, as shown in FIG. Since the pitch is only in a pinched state, the occurrence of cumulative pitch errors can be reduced.

[Brief explanation of drawings]

1 to 5 are explanatory diagrams of a conventional example, and FIG. 6 is a partial perspective view of a coil unit used in an embodiment of the present invention.
FIG. 7 is a partial side sectional view of the same, FIG. 8 is a view of FIG. 6 seen from above, FIG. 9 is an inclination angle view of the conventional coil wire, and FIG. 10 is the same as that of FIG. 6. FIG. 11 is a perspective view of a main part of another embodiment, and FIG. 12 is a perspective view of a connecting ring used in another embodiment.
3 is a sectional view thereof, FIG. 14 is an enlarged perspective view of part B in FIG. 12, FIGS. 15 and 16 are illustrations of its installation, and
7 to 21 are explanatory views of modified examples of the coil unit, and FIGS. 22 to 25 are explanatory views of manufacturing modified examples of the coil sheet. 1°°° Inner cylinder coil 2... Outer cylinder coil 5, 6...
・Ends of coil wire 7, 8... Welding auxiliary wire agent
Patent Attorney Takehiko Matsumoto 4 Figure 5 Figure 7 Figure 15 Figure 16 (a) (b) Figure 19 Figure 21 Procedural Amendment (Gin February 8, 1981 Director General of the Patent Office 1) Display of the case 1982 Patent Application No. 077067 24 Name of the invention Process for manufacturing iron coreless armature 3, person making the amendment Relationship to the case Patent applicant Location 1048 Kadoma, Kadoma City, Osaka Name (583) ) Representative of Matsushita Electric Works Co., Ltd. (2) The entire text of the claims column of the specification is corrected as shown in the attached sheet. (3) Page 1 of the specification In line 20, page 2, line 3, page 3, line 18, page 5, line 9, and page 7, line 20, "armature" is corrected to "armature" (4) On page 7, line 18 of the specification, insert "[Also, the connecting ring can be used as a commutator, which simplifies the armature structure." next to "It will be done." [After correction.] Scope of Claims] 2. Scope of Claims (1) On the outer periphery of a spiral inner cylindrical coil having a structure in which a plurality of coil wires are twisted on a cylindrical surface, A spiral-shaped outer cylindrical coil with opposite directions is formed, and the end of the coil wire of the inner cylindrical coil and the corresponding end of the coil wire of the outer cylindrical coil are connected at both the upper and lower end surfaces of the cylinder. This is a manufacturing method for a iron-free core type one grip ball that forms an electrically closed loop by connecting the end of the coil wire of the inner cylinder coil and the end of the coil wire of the outer cylinder coil. A method for producing a iron-free core type silkworm king, which is characterized in that the method is carried out by extending the connecting tool in a floating state from the end of the coil wire to the end of the coil wire of the outer cylindrical coil.

Claims (1)

[Claims] (1) On the outer periphery of a spiral inner cylindrical coil, which has a structure in which multiple coil wires are twisted on a cylindrical surface, a spiral outer cylindrical coil whose twisted direction of the coil wire is opposite to that of the inner cylindrical coil is attached. Iron-free core type electric wire that connects the end of the coil wire of the inner cylindrical coil and the corresponding end of the coil wire of the outer cylindrical coil at both upper and lower end surfaces of the cylinder to form an electrical closed loop. In this manufacturing method, the end of the coil wire of the inner cylinder coil and the end of the coil wire of the outer cylinder coil are connected with the connecting tool lifted from the end of the coil wire of the inner cylinder coil. A method for manufacturing a coreless armature, which is characterized by extending the coil wire of an outer cylindrical coil to the end.