JP2005012875A - Electric motor - Google Patents

Abstract

An electric motor with good assemblability is obtained.
A rotor is housed in an inner ring magnetic pole portion housed in a teeth portion 3 by fitting end faces of insulators A and B having insulation properties obtained by dividing a plurality of teeth forming a plurality of slots into two. The motor is configured by winding a coil around a slot so as to wrap the coil and fitting it to an outer ring yoke part constituting the outer ring part. A guide structure for guiding is provided. In the guide structure, the ends of some of the teeth portions 7 are made longer than the ends of the other teeth portions 3. Alternatively, the fitting dimension at the end of the long tooth portion 7 is increased. Furthermore, a part of the end of the teeth part 3 is made longer than the other part.
[Selection] Figure 2

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inner rotation type electric motor using a rotor winding type and a two-divided type insulator for insulation.
[0002]
[Prior art]
There is an electric motor that performs insulation between a stator core and a winding applied to the stator core by insulators that are faced to each other so as to cover the stator core (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 3-70043 (page 5-6, Fig. 6)
[0004]
[Problems to be solved by the invention]
In the conventional electric motor described above, a stepped portion is formed on one side of the abutting portion of the insulator that extends to the other side and overlaps with the abutting portion on the other side, and the insulation of the abutting portion is maintained, but the insulator is abutted. At the same time, it is very difficult to align the ends of multiple teeth at the same time and superimpose all the stepped parts, and it takes time to assemble, and if the abutting part is abutted and polymerized in a halfway alignment state, the insulator will be damaged. . Even if an attempt is made to increase the dimensions to be polymerized and to improve the assemblability, there has been a problem that the coil perimeter becomes longer and the characteristics of the motor deteriorate due to a decrease in the winding cross section.
[0005]
The present invention has been made in order to solve the conventional problems, and an object of the present invention is to obtain an electric motor with good assemblability and to be insulated with an insulator that does not cause deterioration of the electric motor characteristics. It is to obtain the electric motor which aimed at.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention accommodates the rotor in the inner ring magnetic pole portion housed in the teeth portion by fitting the end faces of the insulator having the insulating property obtained by dividing the plurality of teeth forming the plurality of slots into two parts, For an electric motor that is configured by winding a coil around a slot so as to wrap this rotor and fitting it to an outer ring yoke part that constitutes an outer ring part, hit one of the fitting ends of the insulator before hitting the other. A means for providing a guide structure for guiding the fitting is adopted. Thereby, when fitting the insulators, it is possible to match the alignment of other tooth portions by aligning a limited number of tooth portions provided with the guide structure without simultaneously aligning all the ends of the plurality of tooth portions. it can.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are perspective views of one insulator A of the electric motor of the present embodiment, and FIG. 3 is a perspective view of the other insulator B. FIG. This electric motor is a rotor-wound type internal rotation type electric motor. As shown in FIG. 4, the end faces of insulators A and B having insulating properties obtained by dividing a plurality of teeth 2 forming a plurality of slots 1 into two parts The rotor 5 is housed in the inner ring magnetic pole part 4 housed in the tooth part 3 by fitting, and a coil 6 is wound around the slot 1 so as to wrap the rotor 5, and the outer ring yoke part constituting the outer ring part (not shown) is mounted. It is configured to be fitted by press-fitting.
[0008]
The insulators A and B are molded using an LCP such as an insulating liquid crystal polymer (for example, a wholly aromatic type II liquid crystal polyester composed of parahydroxybenzoic acid and 2,6-hydroxynaphthoic acid). . This LCP has good moldability, can be thinned, has a large winding cross section, and has a short coil circumference, so that the characteristics can be improved.
[0009]
The insulator A is assembled by fitting an end surface thereof to an insulator B in which the teeth 2 are housed in the teeth portions 3 arranged in the shape of spline teeth in the circumferential direction. A guide structure for guiding the fitting is provided at the fitting end of the tooth portion 3 of the insulator A. The guide structure is a structure that guides other fittings first when fitting, and specifically, the following various structures are adopted.
[0010]
【Example】
Example 1.
As shown in FIG. 1 and FIG. 2 as a guide structure, the end of the tooth portion 3 of the insulator A is made longer than the end of the other tooth portion 3. As a result, even if the ends of all the teeth portions 3 are not aligned and fitted together, if a limited number of long teeth portions 7 are first fitted, the short teeth portion 3 is fitted in accordance with the fitting of the long teeth portion 7. Therefore, the assembly of the insulator A and the insulator B can be easily performed without trouble.
Further, by lengthening the tooth portion 7 around which the coil 6 is not wound and shortening the tooth portion 3 around which the coil 6 is wound, the peripheral length of the coil 6 is not increased, and the winding is not disturbed in the winding. Linearity is also improved. That is, the width of the long teeth portion 7 increases due to the draft angle from the mold. If the coil 6 is wound around the teeth portion 7 having a long width, the coil peripheral length becomes long and the characteristics deteriorate. Furthermore, by increasing the fitting dimension of the end of the long teeth portion 7, the fitting of the long teeth portion 7 to be fitted first becomes easier and the assemblability is improved.
[0011]
Example 2
FIG. 6 shows a guide structure in which the center side of the tooth portion 3 of the insulator A is longer than the outer peripheral side by a slope. As a result, the long portion 8 on the center side of the tooth portion 3 is first fitted, and the short portion 9 can be fitted in a manner following the fitting, so that the assemblability is improved. The long portion 8 may be on the outer peripheral side, and by increasing the fitting dimension of the long portion 8, the fitting of the tooth portion 3 to be fitted first becomes easier and the assemblability is further improved. FIG. 5 shows a structure in which a long portion of the tooth portion is further protruded as a guide structure of the insulator A. By providing such a protruding portion, the assembly of the insulator A and the insulator B becomes easier, and the assemblability is further improved. Moreover, as shown in FIG.7 and FIG.8, a smooth guide function works by taking the form which connected the long part 8 and the short part 9 with the curve 10, and an assembly becomes easy.
[0012]
Example 3 FIG.
As shown in FIG. 9 and FIG. 10 as a guide structure, the length of a part of the teeth portion 3 of the insulator A is configured in a circumferential direction. For this order, the lengths of some of the teeth portions 3 do not have to be different. By changing the length of a part of the teeth portion 3 in a circumferential order, the insulator A can be fitted while being rotated in the direction of shortening from the longest tooth portion 7, and assemblability is improved.
[0013]
In the above embodiment, after the rotor is placed in the insulators A and B, the coil 6 is wound around the slot 1 so as to wrap the rotor. However, the rotor is inserted after winding. Also good. Further, although the tooth portion 3 is configured to be fitted to the outer ring yoke portion, a core in which the tooth portion 3 and the yoke portion are integrated may be used.
[0014]
【The invention's effect】
According to the present invention, it is possible to obtain an electric motor that is insulated by an insulator with good assemblability.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an insulator A of an electric motor according to an embodiment and Example 1. FIG.
FIG. 2 is a perspective view showing the insulator A of the electric motor of the embodiment and Example 1 at another angle.
FIG. 3 is a perspective view showing an insulator B of the electric motor according to the embodiment.
FIG. 4 is an end view showing a form in which a coil is wound around the insulator of the electric motor according to the embodiment.
5 is a cross-sectional view showing an insulator A of Example 2. FIG.
6 is a cross-sectional view showing another insulator A of Embodiment 2. FIG.
7 is a perspective view showing another insulator A of Embodiment 2. FIG.
8 is a front view of the insulator A of FIG.
FIG. 9 is a perspective view showing an insulator A according to a third embodiment.
10 is a front view of the insulator A of FIG. 9. FIG.
[Explanation of symbols]
1 slot, 2 teeth, 3 teeth part, 4 inner ring magnetic pole part, 5 rotor, 6 coil, 7 long tooth part, 8 long part, 9 short part, 10 curve, A insulator, B insulator.

Claims (9)

An electric motor configured to insulate a winding from the stator core by sandwiching a stator core having a plurality of teeth forming a plurality of slots with an insulator having a fitting structure between end faces, and the fitting of the insulator An electric motor provided with a guide structure that guides another fitting at one end of the fitting. 2. The electric motor according to claim 1, wherein the guide structure has a configuration in which an end of a part of a tooth portion is longer than an end of another tooth portion. The electric motor according to claim 2, wherein an end of the tooth portion around which the coil is not wound is lengthened and an end of the tooth portion around which the coil is wound is shortened. 4. The electric motor according to claim 2, wherein a fitting dimension of an end of the teeth portion having a long end is increased. 2. The electric motor according to claim 1, wherein the guide structure has a configuration in which a part of the end of the tooth portion is longer than the other part. 6. The electric motor according to claim 5, wherein the length of the teeth portion is arranged in the circumferential direction. It is an electric motor in any one of Claim 1-6, Comprising: The electric motor which comprised the long part of the teeth part as a guide structure as a protrusion part. It is an electric motor of Claim 6, Comprising: The electric motor which connected the long part and short part of the teeth part with the curve. It is an electric motor in any one of Claims 1-8, Comprising: The electric motor which shape | molded the insulator with the LCP material.

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