JP2002291190A - motor - Google Patents

Abstract

(57) [Problem] To provide a motor in which a slot width of an armature having an iron core constituted by a curling core is uniform. SOLUTION: A curling iron core 2 formed by bending a magnetic member formed by connecting a plurality of salient poles 36 formed by laminating a plurality of magnetic thin plates to each other in an annular shape.
6 and an insulating member 35 disposed over the surface of the salient pole 36.
a and salient poles 36 of iron core 26 via insulating member 35a.
A coil 27 wound around the armature, and a rotor disposed radially inward of the armature. When the insulating members 35a provided are in contact with each other when the magnetic member is bent, the respective slot widths d formed between the salient poles 36 are made uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to a motor formed by bending a plurality of salient poles formed by laminating a plurality of magnetic thin plates into an annular shape. Motor having an armature having a curling core.

[0002]

2. Description of the Related Art There are known various types of conventional motors used as driving sources for various industrial equipment. Such a motor is composed of an armature fixed to a cylindrical frame, a driving magnet rotatably disposed radially inwardly of the armature, and a rotor formed by the driving magnet with an output shaft. By supplying a current to the armature at a predetermined timing, the armature is excited and the rotor rotates by a magnetic action between the armature and the driving magnet. The output shaft transmits torque by being connected to industrial equipment as a driven device, and is applied to various uses.

An armature 10 used in such a conventional motor includes, for example, as shown in FIG.
The coil 4 is wound around a plurality of salient poles 6 b projecting radially inward of the iron core 6, and an insulating member 8 interposed between the salient poles 6 b and the coil 4.

The iron core 6 is a magnetic member having a plurality of (12 in FIG. 7) salient poles 6b projecting inward in the radial direction and being continuous in a band shape, and an insulating member 8 is provided on each salient pole 6b. It is formed by curling in an annular shape after winding each of the coils 4 through the coil. Such a band-shaped continuous iron core having a plurality of salient poles is hereinafter referred to as a curling core.

In the curling type core, as shown in FIG. 9 to be described later, the coil 4 can be wound in a state of a magnetic member in which the iron core 6 is continuous in a belt shape.
The slot formed between them is greatly open, and compared to the case where a coil is wound around an annular core from the beginning,
There is an advantage that winding work is easy. Along with this, the coil can be wound neatly, and the space factor of the coil (the amount of coil per unit volume) can be increased, so that an efficient armature can be obtained.

[0006] The method of manufacturing the curling core is as follows.
As shown in FIG. 8, a plurality of pieces 16 (the pieces 16) integrally having a yoke portion piece 16 a and a salient pole piece 16 b are provided.
Although there are twelve, only three of them are shown in FIG. 8)
The magnetic thin plates 5 connected to each other are punched from a silicon steel plate. The yoke piece 16a is formed in an arc shape (about 30 degrees width). The salient pole piece 16b includes a portion protruding radially inward from substantially the center of the yoke portion 16a, and a portion extending in an arc shape (approximately 25 degrees wide) on both sides in the circumferential direction from the tip of the portion. It is formed in a T shape.

[0007] By laminating a plurality of such magnetic thin plates 5, as shown in FIG. 9, an iron core 6 made of a magnetic member continuous in a belt shape is formed. At this time, iron core 6
Are integrated by pressing each laminated magnetic thin plate 5 in the laminating direction and caulking and fixing to form a yoke portion 6a and salient poles 6b, but there are twelve yoke portions 6a and salient poles 6b. 9 shows only three of them). An insulating member 8 is attached to each of the plurality of salient poles 6b in the iron core 6.
And the coil 4 is wound therefrom. afterwards,
The iron core 6 around which the coil 4 is wound is mechanically or manually bent into an annular shape, and the side end portions 19 of the yoke portions 6a located at both ends are fastened by welding, as shown in FIG. The armature 10 is completed. The insulating member 8 is a resin molded product made of a synthetic resin material, and each of the salient poles 6b
And a pair of ones that are sandwiched by one salient pole 6b from the vertical direction which is the lamination direction.

[0008]

However, in the curling type core, when the iron core 6 is bent into an annular shape mechanically or manually, each of the adjacent salient poles 6 is bent.
There is a problem that the slot width dimension d between b (see FIG. 10) is not uniform for all the slots. That is, it is possible to form the belt-shaped magnetic member in an annular shape by bending the iron core 6 into an annular shape mechanically or manually and welding the end portion 19 of the yoke portion 6a.
It is extremely difficult to bend the connecting portion of the yoke portion 6a between the salient poles 6b at the same angle even if it is machined. For this reason, the slot widths d between the adjacent salient poles 6b in the iron core 6 formed into an annular shape often do not have equal intervals. This is a unique problem that is difficult to avoid due to the configuration of the curling core.

As described above, in the armature 10 in which the widths of the slots are not equal, the magnetic effect of the salient poles 6b with the driving magnets that are radially opposed varies in the circumferential direction. As a result, the rotor having the driving magnet varies in the magnetic attraction force and the magnetic repulsion force in the circumferential direction, and a portion having a large torque and a portion having a small torque are generated. With the problem that it cannot be obtained.

Accordingly, an object of the present invention is to provide a motor having an armature having an iron core constituted by a curling type core and having a uniform slot width.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a magnetic member having a plurality of salient poles formed by laminating a plurality of magnetic thin plates connected to each other in an annular shape. A curling-type core formed by bending the core, an insulating member provided to cover the surface of the salient pole, and a coil wound around the salient pole of the core through the insulating member. Armature, and a rotor disposed radially inward of the armature, wherein the insulating members provided at salient poles adjacent to each other are magnetically active. When the members are bent, they come into contact with each other.

Accordingly, even if the slots formed by the adjacent salient poles have an arbitrary slot width, the respective insulating members are in contact with each other, so that the slots are prevented from approaching a predetermined distance or less. At the same time, the slot formed by the salient poles adjacent to the opposite side of the contacted salient poles is prevented from being separated more than a predetermined interval. As a result, in all the salient poles, the insulating members abut against each other, so that all the slot widths d are made uniform. Further, since the slot of the iron core is closed by the insulating member, it is possible to prevent the coil from being broken and protruding from the slot. Note that a plurality of slots formed by each salient pole are formed in the armature, and it is desirable that the insulating members in each slot abut on all slots, but slots that do not abut may be included.

The insulating member may have a shape such that a resin molded product made of a synthetic resin material is individually fitted into each salient pole,
Alternatively, the salient poles may be formed so as to be fitted together and collectively, or a synthetic resin material may be molded and fixed to the iron core.

[0014]

FIG. 1 shows a first embodiment of a motor 20 according to the present invention. FIG. 2 is a sectional view taken along line AA of FIG. Here, the motor 20 of the present invention shown in FIG. 1 is used as a rotary drive source of industrial equipment, and includes a bracket 22 and a cylindrical frame 23 attached around the bracket 22 and extending downward therefrom. And an armature 24 inserted into the inner surface of the frame 23. The armature 24 has an iron core 26 formed by laminating a plurality of magnetic thin plates 25.
And a coil 27 wound around the iron core 26 in the laminating direction via an insulating member 35,
It has a substantially cylindrical shape. The coil 27 is
Is connected to a circuit board 21 mounted on the upper portion of the frame 23, and is drawn out of the frame 23 by a lead wire through the circuit board 21 and connected to a power supply.

The rotor 3 is provided radially inward of the armature 24.
4 is disposed rotatably relative to the armature 24. The rotator 34 includes an output shaft 28 extending in a vertical direction,
And a driving magnet 33 disposed on the intermediate outer peripheral portion of the output shaft 28. The upper portion of the output shaft 28 is supported by the bracket 22 via the upper bearing 29a, the lower portion is supported by the bottom plate 30 of the frame 23 via the lower bearing 29b, and the upper end of the output shaft 28 is outside the bracket 22. The cooling fan 21 is mounted on the projection.
Further, an upper cover 31 is mounted above the frame 23, and the cover 31 surrounds the cooling fan 21 therein. As shown in FIG. 2, the frame 23 is provided with a blow hole 32 through which the air supplied by the cooling fan 21 flows to absorb heat generated from inside the motor and cool the inside of the motor.

In this manner, a current is supplied to the coil 27 of the armature 24 at a predetermined timing to excite the armature 24, so that the output shaft 28 rotates together with the rotor 34 by the magnetic action of the rotor 34 with the magnet 33. And a driven device (not shown) connected to the lower end of the output shaft 28.

The armature 24 of the present invention uses a known curling core similar to that described with reference to FIG. 7 as the iron core 26, but the insulating member 35 is provided with a known core as shown in FIG. Different from the one.

That is, the insulating members 35 are individually and independently disposed on the respective salient poles 36 and the yoke portion 38 of the iron core 26, and as shown in FIGS. It is composed of an upper insulating member 35a and a lower insulating member 35b which are fitted and sandwiched from the vertical direction which is the lamination direction with the salient poles 36, and each is molded as a resin molded product from a synthetic resin material. Thus, the upper and lower insulating members 35
When a and 35b are formed so as to be sandwiched with respect to the iron core 26 from the same direction as the lamination direction of the magnetic thin plates 25, the number of laminations of the iron core 26 increases and decreases, and when a new insulating member is resin-molded, There is an advantage that the molding die can be easily shared.

The upper insulating member 35a includes a main body 35a1 that covers the radial portion of the salient pole 36, an inner standing portion 35a2 that stands from the upper end surface of the salient pole 36 in the circumferential direction, and a circumferential portion of the salient pole 36. Outer wall portion 35a3 that covers the outer peripheral surface of
End 35a extending from the end to the circumferential end of the salient pole 36
4, an inner wall 35a5 that covers the inner peripheral surface of the yoke 38,
It comprises an outer standing portion 35a6 that covers the upper end surface of the yoke portion 38 and extends to almost the same height as the inner standing portion 35a2. The main body portion 35a1, the outer wall portion 35a3, the side end portion 35a4, and the inner wall portion 35a5 extend to near a middle portion of the salient pole 36 and the yoke portion 38 in the laminating direction. The side end surface of the inner standing portion 35a2 and the side end surface of the side end portion 35a4 are the same flat surface.
The lower insulating member 35b has the same configuration and includes a main body 35b1, an inner standing portion 35b2, an outer wall portion 35b3, a side end portion 35a4, an inner wall portion 35b5, and an outer standing portion 35b6. The two insulating members 35a and 35b are nested in the vicinity of an intermediate portion in the laminating direction.
, And only the upper end of the lower insulating member 35b overlaps.

As described above, the salient pole 36 has the radially outer portion, the outer circumferential surface of the circumferential portion, the inner circumferential surface and the upper and lower end surfaces of the yoke portion 38 covered by the insulating member 35, and the coil 27 is wound therefrom. You. At this time, the inner standing portions 35a2, 35b2
The outer standing portions 35a6 and 35b6 prevent the wound coil 27 from rolling inward or outward in the radial direction.

As shown in FIG. 5, such an armature 24 can be formed by a known curling type core manufacturing method (see FIGS. 8 and 9), but the insulating member 35 is provided. By curling the iron core 26, the inwardly extending portions 35a2, 35b2 of the insulating member 35 in the slots formed between the adjacent salient poles 36 as shown in FIG.
Side end and side end portions 35a4, 35b4 are in contact with each other. That is, the slot between the salient poles 36 is closed by the insulating member 35.

As a result, the slots formed between the adjacent salient poles 36 are formed in the respective inner standing portions 35a2,
Since the side end of 35b2 and the side end portions 35a4 and 35b4 are in contact with each other, each slot should have an arbitrary width dimension d.
Even if it is curled in such a way that it does not approach below the predetermined interval, the slot formed by the adjacent salient pole 36 on the opposite side of the salient pole 36 in contact with the Is also prevented. As a result, at each salient pole of the whole, the inner standing portion 35a
2, 35b2 and the side end portions 35a4, 35b4 are in contact with each other, so that all slot width dimensions d are made uniform.

Therefore, in the armature 24, the slot widths d are equally spaced, and the magnetic effect of the salient poles 36 with the driving magnet 33 which faces radially inward varies in the circumferential direction. Disappears. As a result, the rotor 34 having the driving magnet 33 does not vary in the magnetic attraction force and the magnetic repulsion force in the circumferential direction, the torque is uniformed, smooth rotation is always obtained, and appropriate and stable rotation characteristics are obtained. Will be. In addition, since the torque transmitted to the driven device does not change, the operating characteristics of the driven device can be improved.

Further, since the slot formed between the salient poles 36 is closed by the insulating member 35, it is possible to prevent the coil 27 wound around the salient pole 36 from being broken and protruding from the slot. This is because if the core 26 is a curling core, the coil 27 may move when the core 26 is bent into an annular shape during the manufacture of the armature, and may protrude from the slot in some cases. However, by using the insulating member 35 as described above, such a situation can be prevented because the slot is closed.

In the above embodiment, the inner standing portions 35a2, 3a3 of the upper insulating member 35a and the lower insulating member 35b are arranged.
The side end and the side end 35a4, 35b4 of 5b2 abut on the side end and the side end 35a4, 35b4 of the other inner standing portion 35a2, 35b2 adjacent thereto, so that the slot is completely closed. However, the inner standing portions 35a2, 3a
Only the side end of 5b2 and a part of the side end portions 35a4 and 35b4 may abut, and the slot may be partially closed. Alternatively, the side surfaces of the inner standing portions 35a2, 35b2 and the contact surfaces of the side end portions 35a4, 35b4 are flat, but the engagement structure may be made uneven to make the contact state more reliable. Alternatively, it may be fixed by an adhesive. Thereby, even if any impact is applied from the outside after the armature 24 is assembled into the frame 23 and a stress which fluctuates the slot width of the iron core 26 is applied, the slot width dimension can be maintained. 27 does not protrude.

Next, the second embodiment will be described focusing on the differences from the first embodiment. In the above-described embodiment, the insulating member 35 is configured separately and independently for each salient pole 36 and the yoke portion 38. However, in the present embodiment, the insulating member corresponding to the adjacent salient pole 36 and the yoke portion 38 is replaced with an insulating member. It is a linked configuration.

That is, as shown in FIG.
Reference numeral 0 denotes a strip-shaped resin molded product in which the upper insulating members 35a of the first embodiment are connected to each other by the connecting portions 52 by the number of the salient poles 36 and the yoke portions 38 (the salient poles 36 and the yoke portions 3).
8 are 12 but FIG. 6 shows only 3 of them). The lower insulating member is also a band-shaped resin molded product in which the lower insulating members 35b of the first embodiment are connected to each other by connecting portions by the number of salient poles 36.

The upper insulating member 50 and the lower insulating member are fitted in the iron core 26, and the coil 27 is wound therearound. Also in the present embodiment, the adjacent inner standing portions of the upper insulating member 50 and the side end portions are in contact with each other, and the inner standing portions and the side end portions of the lower insulating member are also in contact with each other,
Also in this armature, the slot width dimensions d are equally spaced, and the same effects as in the first embodiment can be obtained. In addition, in the present embodiment, the insulating member is composed of two members, an upper insulating member and a lower insulating member, so that the number of parts can be reduced as compared with the case of the first embodiment. Workability is further improved. In the present embodiment, it is assumed that all the salient poles are connected. However, the number of connected poles may be changed as necessary, such as every two, or every three or four.

Further, the third embodiment will be described focusing on differences from the above two embodiments. In the first and second embodiments, a resin molded product in which the insulating member is formed of a synthetic resin material is inserted into the iron core. In the present embodiment, a fluid made of the synthetic resin material is directly molded on the iron core. And is integrally fixed, and an insulating member is interposed between the iron core and the coil. In this embodiment, an armature can be formed in the same manner as in the first and second embodiments by arranging a synthetic resin on the iron core by a known means by molding, and winding a coil thereon.
Also in the present embodiment, the armature has a width d of each slot.
Are equally spaced, and the same effects as those of the first and second embodiments can be obtained. In addition, the insulating member can be formed relatively thin. For example, it is suitable when the size of the armature is reduced. The present embodiment differs from the first and second embodiments in the method of forming the insulating member and the state of close contact with the iron core. However, the appearance is similar to the first and second embodiments, so that the illustration is omitted.

The embodiment according to the present invention has been described above. However, the scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the insulating member 3 of the above embodiment
5 has a shape that is formed of upper and lower insulating members 35a and 35b and is sandwiched from the same direction as the laminating direction of the magnetic thin plates 25 of the iron core 26, but the shape is not limited to this. Direction perpendicular to the lamination direction,
That is, a shape in which the salient pole 36 and the yoke portion 38 are sandwiched from the left and right, or a single member having a rectangular annular shape can be used.

[0031]

According to the motor of the present invention, the armature of the armature has the same slot width dimension, and each salient pole has a magnetic action in the circumferential direction with the driving magnet which faces inward in the radial direction. Variations are eliminated. As a result, the rotor having the driving magnet does not vary in the magnetic attraction force and the magnetic repulsion force in the circumferential direction, the torque is uniform, smooth rotation is always obtained, and appropriate and stable rotation characteristics are obtained. Become. Further, it is possible to prevent the coil from winding and collapsing from the slot of the core of the armature. Further, the motor of the present invention can improve the motor characteristics only by changing the shape of the insulating member in the known armature, and can be realized at low cost because it does not significantly change the conventional structure. It is.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a motor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view showing a part of the armature of FIG. 1;

FIG. 4 is a perspective view showing a part of the armature of FIG. 1;

FIG. 5 is a cross-sectional view showing a part of the armature in the course of manufacture in FIG.

FIG. 6 is a plan view showing a part of an armature used for a motor according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing an armature of a conventional motor.

8 is a plan view showing a part of the armature in the course of manufacturing in FIG. 7;

FIG. 9 is a plan view showing a part of the armature in the course of manufacture in FIG. 7;

FIG. 10 is an enlarged sectional view showing a part of the armature shown in FIG. 7;

[Explanation of symbols]

 Reference Signs List 20 motor 24 armature 25 magnetic thin plate 26 iron core 27 coil 34 rotor 35 insulating member 35a, 50 upper insulating member 35b lower insulating member 36 salient pole 38 yoke part

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[Procedure amendment]

[Submission Date] March 28, 2001 (2001.3.2)
8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (4)

[Claims] A curling iron core formed by bending a magnetic member formed by connecting a plurality of salient poles formed by laminating a plurality of magnetic thin plates to each other into an annular shape, An armature having an insulating member disposed over the surface, and a coil wound around the salient pole of the iron core via the insulating member; and an armature disposed radially inward of the armature. A motor comprising: a rotor, wherein the insulating members disposed at the salient poles adjacent to each other come into contact with each other when the magnetic member is bent. 2. The motor according to claim 1, wherein the insulating member comprises a pair of insulating members, an upper insulating member covering the upper side of the salient pole and a lower insulating member covering the lower side.
A motor, wherein each of the upper insulating member and the lower insulating member is disposed so as to individually sandwich each salient pole. 3. The motor according to claim 2, wherein the insulating member comprises a pair of insulating members, an upper insulating member covering the upper side of the salient pole and a lower insulating member covering the lower side.
A motor, wherein each of the upper insulating member and the lower insulating member is disposed so as to sandwich the plurality of salient poles. 4. The motor according to claim 2, wherein the insulating member is molded on the iron core.