JP2002345193A - Insulator for motor core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide insulator for a motor core which can improve assembling properties. SOLUTION: The insulator 21 is equipped with a base part 22 covering one end surface (upper surface of a core sheet 11b) of a motor core 11, in which an engaging protruded part 11d is formed, and a skirt part 23 which is stretched from the base part 22 and covers the inner peripheral surface of a slot formed between teeth parts 13 of a motor core 11. An engaging recessed part 25b is formed in a stretched part 25 of the base part 22, corresponding to the engaging protruded part 11d. While the base part 22 covers the one end surface (the upper surface of the core sheet 11b) of the motor core 11, and the skirt part 23 covers the inner peripheral surface of the slot, the engaging protruded part 11d is engaged with the engaging recessed part 25b. Thereby the insulator 21 is assembled in the motor core 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator for a motor core, and more particularly, to an insulator used for insulating a laminated motor core.

[0002]

2. Description of the Related Art Conventionally, an insulator made of an insulating material (for example, resin) has been used to insulate a laminated core of a motor. Such an insulator is disclosed in, for example,
Japanese Patent Application Laid-Open No. 252557/1996 and Japanese Patent Application Laid-Open No. H08-84458, each of which includes a base covering a core end face, and a skirt extending from the base and covering an inner peripheral surface of a slot (teeth portion or the like) of the core. . These insulators are mounted with a slight clearance from the inner peripheral surface of the slot of the core so that there is no play in the circumferential direction.

[0003]

However, since the insulator is a resin product, there has been a problem that it is difficult to assemble the insulator to the core due to the sink during molding. In particular, when the skirt portion of the insulator is long, the insulator tends to be inclined, and the above-mentioned problem is remarkable.

[0004] It is an object of the present invention to provide an insulator for a motor core capable of improving the assemblability.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a base for covering one end face of a motor core, and a base extending from the base and being connected to each tooth of the motor core. A skirt portion that covers an inner peripheral surface of the slot formed in the base portion, and a fitting portion that fits with the fitted portion formed on the one end surface is provided on the base portion, and is integrally formed with an insulating material. The gist is that

According to a second aspect of the present invention, in the motor core insulator according to the first aspect, the fitted portion is provided on each of a plurality of core sheets constituting the motor core. The gist of the present invention is that it is a lamination fitting part for lamination fixation.

[0007] The invention described in claim 3 is the first or second invention.
In the insulator for a motor core described in the above, a plurality of the fitting portions and the fitted portions are provided in the same number, one fitting portion and one fitted portion are formed so as to be press-fitted, and the other fitting portions are formed. The gist is that the mating portion and the fitted portion are each formed so as to be freely fittable.

According to a fourth aspect of the present invention, in the motor core insulator of the third aspect, the insulator is formed so as to face the fitting portion and the fitted portion which are formed so as to be press-fitted and can be loosely fitted. The gist is that the fitted portion and the fitted portion are formed so that they can be loosely fitted only in the facing direction.

According to a fifth aspect of the present invention, in the motor core insulator according to the fourth aspect, one of the fitting portion and the fitted portion formed so as to be press-fitted is formed in a cylindrical convex shape. And the other is formed in a columnar concave shape, and one of the fitting portion and the fitted portion formed so as to be playable is formed in a columnar convex shape, and the other is formed in the opposite direction. The gist of the present invention is that it is formed in an elongated elongated concave shape.

(Operation) According to the first aspect of the present invention,
The motor core insulator is assembled to the motor core by fitting the fitting portion and the fitted portion while the base portion covers one end surface of the motor core and the skirt portion covers the inner peripheral surface of the slot. Therefore, a gap allowing the inclination of the skirt portion can be provided between the skirt portion and each of the teeth portions, and the assemblability of the motor core insulator can be improved.

According to the invention described in claim 2, according to claim 1,
In addition to the operation of the invention described in the above, while the fitted portion can use the existing laminated fitting portion on the motor core side,
Each core sheet can be formed in the same shape. As a result, the cost of the motor constituted by the motor core and the motor core insulator can be reduced.

[0012] According to the third aspect of the present invention, the first aspect is provided.
In addition to the effects of the inventions described in (1) and (2), the insulator for the motor core is attached by press-fitting one fitted portion and one fitted portion. The loose fit between the other fitting part and the fitting part facilitates fitting of the motor core insulator. As a result, the assemblability of the motor core insulator can be improved, and the pitch dimension between the fitted parts or between the fitting parts does not need to be high precision, so that the manufacturing cost of the motor core insulator and the motor core is reduced. Reduction can be achieved.

According to the fourth aspect of the present invention, the third aspect is provided.
In addition to the operation of the invention described in the above, the other fitting portion and the fitted portion which are arranged to face the fitted portion and the fitted portion which are formed so as to be able to be press-fitted and are playably fitted, It is formed so that it can be loosely fitted only in the opposite direction. Therefore, the motor core insulator is positioned by being press-fitted in a direction other than the direction in which the other fitting portion and the fitted portion facing each other are opposed to each other, so that the insulator for the motor core can be loosely fitted in the facing direction. It is not necessary to make the pitch dimension between the joints or the fitting parts high precision.

According to the invention described in claim 5, according to claim 4,
In addition to the effects of the invention described in (1), since the fitted portion and the fitting portion are formed in a simple shape, the manufacturing cost of the motor core insulator and the motor core does not increase.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is embodied in a motor core insulator assembled to a four-slot motor core will be described below with reference to FIGS. FIG.
FIG. 3 is a plan view showing a state in which the motor core insulator is mounted on the motor core. FIG. 2 is a cross-sectional view of FIG.
FIG. 3 is an enlarged cross-sectional view taken along line A. FIG. 3 is a plan view of the motor core. FIG. 4 is a plan view of the motor core insulator of the present embodiment.

As shown in FIG. 3, the motor core 11 includes an annular portion 12 having a rotor accommodation hole 12a,
And four teeth portions 13 extending radially outward from the outer peripheral surface at equal angular intervals. Four slots 14 are formed between the teeth 13.

As shown in FIG. 2, the motor core 11 has a plurality of core sheets 1 (11 in FIG. 2).
1a and 11b are integrally laminated by bonding or the like. One end of the motor core 11 (the top end in FIG. 2)
The core sheet 11b of each of the teeth portions 11c
At a predetermined position on the upper surface, a fitting convex portion 11d as a fitted portion is protruded. Each fitting projection 11d is formed in a columnar shape having the same diameter and height.

As shown in FIG. 4, a motor core insulator (hereinafter simply referred to as an insulator) 21 includes a base 22 for covering the upper surface of the core sheet 11b as one end surface, and an axial direction of the motor core 11 from the base 22. A skirt portion 23 extending along the skirt portion 23 to cover the inner peripheral surface of the slot 14, and is formed of a resin as an insulating material.

The base 22 is provided with the rotor receiving hole 12a.
An annular portion 24 provided with a through hole 24a having the same diameter as that of the annular portion 24, and four extending portions 25 radially extended outward from the outer periphery of the annular portion 24 at equal angular intervals. Each of the extension portions 25
Are provided with fitting recesses 25a and 25b as fitting portions at positions corresponding to the fitting protrusions 11d, respectively. As shown in FIG. 2, each of the fitting recesses 25a and 25b
The skirt portion 23 is formed on the lower end surface of each extension portion 25 at a depth greater than the height of the fitting projection 11d. The fitting recess 25b provided on one extension 25 is formed in a circular hole having the same diameter as the fitting projection 11d, and the fitting recess provided on the remaining three extensions 25 is formed. Reference numeral 25a is formed in a circular hole slightly larger in diameter than the fitting projection 11d.

Each of the skirt portions 23 includes an arc portion 23a that covers the annular portion 12 of the motor core 11, and a linear portion 23b that covers the teeth portion 13 of the motor core 11.
As shown in FIG. 2, the motor core 11 is formed at a height H which is larger than the axial height h. The arc part 2
The diameter D of 3a is set to be larger than the diameter d of the annular portion 12, and the distance B between two adjacent and parallel straight portions 23b is set to be larger than the width b of the teeth portion 13. That is, each skirt portion 23 is formed such that its inner dimension is slightly larger than the outer dimension of the motor core 11.

Then, as shown in FIG. 1, the insulator 21 has the base portion 22 covering the core sheet 11b and the skirt portion 23 covering the inner peripheral surface of the slot 14. Are fitted to the motor core 11 so as to fit into the fitting recesses 25a and 25b, respectively. At this time, the fitting recess 25a is formed to have a slightly larger diameter than the fitting projection 11d, and the fitting recess 25a is formed.
b is formed to have the same diameter as the fitting projection 11d,
The fitting recess 25b and the fitting protrusion 11d are press-fitted, and the fitting recess 25a and the fitting protrusion 11d are loosely fitted. A gap t (= (D−d) / 2 = (B−b) having a predetermined size is provided between the arc portion 23 a and the annular portion 12 and between the straight portion 23 b and the teeth portion 13. ) / 2) are formed.

According to this embodiment, the following features can be obtained. (1) The insulator 21 is provided between a base 22 that covers one end surface (the upper surface of the core sheet 11b) of the motor core 11 provided with the fitting convex portion 11d and extends from the base 22, and is provided between the teeth 13 of the motor core 11. Slot 14 formed
And a skirt portion 23 for covering the inner peripheral surface of the skirt. Also,
The extension 25 of the base 22 has fitting recesses 25a and 25b corresponding to the fitting protrusion 11d. And the base 22
Is one end surface of the motor core 11 (the upper surface of the core sheet 11b)
The insulator 21 fits the fitting concave portions 25a, 25b and the fitting convex portion 11d while the skirt portion 23 covers the inner peripheral surface of the slot 14.
1 is assembled.

Therefore, the skirt 23 and the teeth 1
The inclination of the skirt 23 between 3 and (3)
Can be provided, and the assemblability of the insulator 21 can be improved.

(2) The three fitting recesses 25a are
The diameter was slightly larger than 1d, and one fitting recess 25b was formed to have the same diameter as the fitting projection 11d. Then, one fitting concave portion 25b and one fitting convex portion 11d are press-fitted, and 3
The three fitting recesses 25a and the three fitting projections 11d are loosely fitted respectively. Accordingly, the insulator 21 is press-fitted between the fitting concave portion 25b and the fitting convex portion 11d.
It is almost positioned. Also, the loose fit between the fitting concave portion 25a and the fitting convex portion 11d facilitates the assembly of the insulator 21. As a result, the assemblability of the insulator 21 can be improved, and the pitch dimension between the fitting protrusions 11d or between the fitting recesses 25a, 25b does not need to be high precision. Manufacturing costs can be reduced.

The above embodiment may be modified as follows. ○ All the fitting portions provided on the insulator 21 are formed in circular recesses having the same diameter, and one of the fitted portions provided on the motor core 11 is formed as a cylindrical projection having the same diameter as the circular recess. May be formed as a cylindrical projection having a diameter slightly smaller than the circular recess.

In the above embodiment, the fitting projections 11d are arranged on the same circumference centered on the center of the annular portion 12 of the motor core 11, but the fitting projections 11d are It may be arranged and arranged on different circumferences centered on the center of the circular portion 12. Correspondingly, the fitting recesses 25a, 25
b may be arranged and implemented on different circumferences centered on the center of the base 22.

The fitting projection 11d and the fitting recesses 25a, 25
b may each be formed in a conical shape. The fitting protrusion 11d and the fitting recesses 25a, 25b may be formed in a cross section other than a circle, for example, a square or a polygon.

The fitting recesses 25a and 25b may be formed as through holes passing through the extension 25. As shown in FIG. 5, the fitting concave portion 25a arranged opposite to the fitting concave portion 25b formed to have the same diameter as the fitting convex portion 11d,
It may be formed as a long hole. At this time, the long hole-shaped fitting recess 25a has a length larger than the diameter of the fitting recess 25b, and has the same width as the diameter of the fitting recess 25b. The longitudinal direction of the long hole-shaped fitting recess 25a matches the direction facing the fitting recess 25b. The fitting projection 1 is inserted into the elongated recess 25a.
1d is press-fitted in the width direction (circumferential direction) and loosely fitted in the longitudinal direction (radial direction). In this case, in addition to the effects described in the features of the above embodiment, the two fitting projections 11d opposed to each other have fitting recesses 25a,
The insulator 21 is press-fitted into the insulator 21b.
Is positioned. That is, it is fixed in the circumferential direction and the radial direction.

Although not shown, the fitting recess 25b
May be formed in an elliptical shape having a major axis extending in a direction (radial direction) facing the fitting recess 25b.

The fitting recess 25a opposed to the fitting recess 25b is a fitting provided at a point symmetrical position with respect to the fitting recess 25b with respect to the axis of the annular portion 24. It points to the joint recess 25a.

As shown in FIG. 6, a protrusion 11e is provided on each of a plurality of core sheets 11a and 11b constituting the motor core 11, and serves as a lamination fitting portion for laminating and fixing the plurality of core sheets 11a and 11b. May be implemented as a fitted portion. That is, each protrusion 11e is fitted into the fitting recess 25a, 25b formed on the insulator 21 side. In this case, in addition to the effects described in the features of the above embodiment, the existing protrusions on the motor core 11 side can be used, and the core sheet 11a and the core sheet 11b can be formed in the same shape. As a result, the cost of the motor constituted by the motor core 11 and the insulator 21 can be reduced.

As shown in FIG. 7, a concave portion 11f is provided on each of a plurality of core sheets 11a and 11b constituting the motor core 11, and serves as a lamination fitting portion for laminating and fixing the plurality of core sheets 11a and 11b. May be implemented as a fitted portion. In this case, on the insulator 21 side, projections 25c and 25d as fitting portions (only the projection 25c that can be press-fitted are shown in FIG. 7 and other projections 25d that can be loosely fitted are not shown) are formed. And
A projection 25 is formed in each recess 11f formed in the core sheet 11b.
c and 25d are respectively fitted. In this case, in addition to the effects described in the features of the above embodiment, the existing concave portion on the motor core 11 side can be used, and the core sheet 11a and the core sheet 11b can be formed in the same shape. As a result, the cost of the motor constituted by the motor core 11 and the insulator 21 can be reduced.

It should be noted that stacking and fixing the plurality of core sheets 11a and 11b means stacking the plurality of core sheets 11a and 11b and restricting the movement in the layer direction. The insulator 21 may be formed of an insulating material other than the resin, for example, rubber or another composite material.

The present invention may be embodied in a motor having five or more slots. Next, technical ideas that can be grasped from the above embodiment and other examples will be additionally described below together with their effects.

(1) The insulator for a motor core according to any one of claims 1 to 5, wherein the insulating material is a resin. Therefore, the insulator for the motor core can be easily formed.

(2) The inner peripheral surface of the slot is constituted by the adjacent side surface of both adjacent tooth portions and the outer peripheral surface of the annular portion between both tooth portions. (3) The fitting portion (25b) formed so as to be press-fittable.
Either one of the fitting part (11d) and the fitting part (11d) is formed in a cylindrical convex shape, and the other is formed in a cylindrical concave shape, and the fitting part (25a) and the fitting part formed so as to be play-fittable. The insulator for a motor core according to claim 4, wherein any one of (11d) is formed in a cylindrical convex shape, and any one of the other is formed in an elliptical concave shape whose major axis extends in the opposite direction. .

[0037]

As described above, according to the present invention, the assemblability of the motor core insulator can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state where an insulator is mounted on a motor core.

FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.

FIG. 3 is a plan view of a motor core.

FIG. 4 is a plan view of a motor core insulator according to the embodiment;

FIG. 5 is a plan view of another example of a motor core insulator.

FIG. 6 is an essential part cross-sectional view of an assembled state of another insulator.

FIG. 7 is an essential part cross-sectional view of an assembled state of another insulator;

[Explanation of symbols]

11: motor core, 11a, 11b: core sheet, 11
d: fitting projection as fitting part, 11e: projection as stacking fitting part as fitting part, 11f ... concave part as stacking fitting part as fitting part, 13 ... teeth part, 14 ... slot, 21 ... insulator as motor core insulator, 22 ... base, 23 ... skirt, 25a,
25b: fitting recesses as fitting portions, 25c, 25d: protrusions as fitting portions.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Suzuki 390 Umeda, Kosai-shi, Shizuoka Prefecture Asmo F-term (reference) 5H002 AA07 AB01 AC04 AC06 5H604 AA08 BB01 BB14 CC05 CC16 DB01 PB03

Claims (5)

[Claims] A base (22) covering one end surface of the motor core (11); and a base (22) extending from the base (22) and extending from the base (22).
1) a skirt portion (23) for covering an inner peripheral surface of a slot (14) formed between each of the teeth portions (13), and the base portion (22) is fitted on the one end surface. Fitting part (25) fitted with the part (11d, 11e, 11f).
a, 25b, 25c, 25d), and are integrally formed of an insulating material. 2. The method according to claim 1, wherein the fitting portion is a motor core (1).
1) provided on each of a plurality of core sheets (11a, 11b) constituting the plurality of core sheets (11a, 11b).
b) for stacking and fixing the stacking fittings (11e, 11e).
The insulator for a motor core according to claim 1, wherein f) is satisfied. 3. The fitting portion (25a, 25b, 25c,
25d) and a plurality of the fitted parts (11d, 11e, 11f) in the same number, and one fitting part (25b, 25
c) and one fitting portion (11d, 11e, 11f) are formed so as to be press-fittable, and the other fitting portions (25a, 25
3. The insulator for a motor core according to claim 1, wherein d) and the fitted portions (11 d, 11 e, 11 f) are each formed so as to be freely fittable. 4. 4. The fitting portions (25b, 25c) and the fitted portions (11d, 11e, 1) formed so as to be press-fittable.
1f) and the fitting portions (25a, 25d) and the fitted portions (11d, 11e, 1), which are arranged to be opposed to each other and formed to be freely fittable.
The motor core insulator according to claim 3, wherein 1f) is formed so that it can be loosely fitted only in the direction in which it faces. 5. One of the fitting portion (25b) and the fitted portion (11d), which is formed so as to be press-fittable, is formed in a cylindrical convex shape, and the other is formed in a cylindrical concave shape, One of the fitting portion (25a) and the fitted portion (11d) disposed opposite to each other is formed in a cylindrical convex shape, and the other is formed in a long hole-shaped concave shape extending in the facing direction. The insulator for a motor core according to claim 4, wherein the insulator is provided.