JP2022173732A - Molded motor and manufacturing method therefor - Google Patents

Abstract

To manufacture a molded motor filled with mold resin without using a mold for molding.SOLUTION: A molded motor includes a core 110, a stator winding wire 120 wound around the core, and a first resin cover 310 and a second resin cover 320 covering both ends of the stator winding wire 120. An injection port 310b for injecting mold resin 200 is provided in the first resin cover 310. The injected mold resin 200 fills the inside of the first resin cover 310, the inside of the second resin cover 320, and an area around the stator winding wire 120. The injection port 310b and the mold resin filled therein are removed from the first rein cover 310.SELECTED DRAWING: Figure 1

Description

The present invention relates to a molded motor in which a stator winding wound around an iron core is molded with resin, and a manufacturing method thereof.

In a molded motor, coil ends of a stator winding wound around an iron core of a stator are molded with resin. Conventionally, as described in Patent Documents 1 and 2, etc., a core around which a stator winding is wound is fixed in a mold provided with a space for filling a mold resin, and the opening of the mold is fixed. I was trying to inject the mold resin from.

A conventional molded motor manufacturing process using the mold 10 will be described with reference to FIG. FIG. 5 is a cross-sectional view showing the configuration of the mold 10 when the molded motor is produced.
Stator 100A has stator winding 120 wound between two winding frames 130 in iron core 110, and lead wire 125 electrically connected to stator winding 120 is led out to the outside. It is

Here, the mold 10 for molding is divided into an upper mold 11, a middle mold 12, a lower mold 13, and a bottom mold 14, and each mold further extends in the direction perpendicular to the plane of FIG. It is divided into multiple parts. The upper die 11 to the lowermost die 14 forming the mold 10 are fastened by fastening means (not shown) to hold the stator 100A.
Here, between the mold 10 and the stator 100A, a mold resin filling space 22 is provided around the stator winding 120 in the upward direction, and a mold resin filling space 23 is provided around the intermediate portion of the stator winding 120. A mold resin filling space 24 is provided around the stator winding 120 in the downward direction, and a mold resin injection space 21 is provided above the mold resin filling space 22 . The mold resin filled spaces 22 and 24 are defined to include the coil ends 120e, respectively.

A state in which the mold resin 200 is injected into the mold 10 with the stator 100A fixed inside the mold 10 will be described with reference to FIG. FIG. 6 is a cross-sectional view showing how the mold resin 200 is injected into the mold 10. As shown in FIG. Here, the area filled with fine dots indicates that the mold resin 200 is filled. The stator 100A shown in FIG. In addition to the mold resin filling space 24 in the direction, the mold resin injection space 21 is filled with the mold resin 200 and molded integrally.

The state of the work after the completion of filling the mold resin will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a cross-sectional configuration of a stator 100A of a molded motor manufactured using the mold 10. As shown in FIG.
When the molding resin is completely filled, the upper mold 11, middle mold 12, lower mold 13, and bottom mold 14 are unfastened, the mold 10 is disassembled, and the molded stator 100A is taken out. FIG. 7(a) shows the stator 100A removed from the mold 10. FIG.

In the stator 100A, the mold resin 200 in the mold resin injection space 21 shown in FIG. 7(a) is unnecessary. Therefore, as shown in FIG. 7B, the mold resin 200 in the mold resin filling space 22 is left and the mold resin 200 in the mold resin injection space 21 is removed by cutting or the like.
The appearance of the finished product of the stator 100A integrally molded using the mold 10 in this manner will be described with reference to FIG. FIG. 8 is a configuration diagram showing the external configuration of a molded motor manufactured using the mold 10. As shown in FIG. As shown in FIG. 8, in the molded motor, the stator winding 120 wound around the iron core 110 is molded with resin by the first resin portion 150a and the second resin portion 150b.

Japanese Patent Application Laid-Open No. 2002-262501 JP-A-07-163081

The method of filling the stator 100A with the mold resin using the mold 10 as described above also has the following drawbacks.
- The mold 10 is expensive. Moreover, if the space to be filled with the mold resin has a complicated shape, the cost becomes even higher.
- It takes a lot of time to assemble and disassemble the mold 10 .
- Grease is applied so that the mold resin does not leak from the gaps of the mold 10, but the grease transfers to the finished stator 100A side, and it takes time to clean the finished product.
- The surface of the mold resin of the completed stator 100A may have unevenness such as scratches, air bubbles, and fine unevenness.

Therefore, it has been desired to manufacture a molded motor by filling molding resin without using a mold for molding.
SUMMARY OF THE INVENTION An object of the present invention is to provide a molded motor filled with molding resin without using a mold for molding, and a method of manufacturing the same.

A molded motor according to the present invention is a molded motor having a stator, and the stator includes an iron core, stator windings wound around the iron core, and a first resin cover covering one end of the stator windings. and a second resin cover covering the other end of the stator winding, the first resin cover being provided with an injection port used for injecting the molding resin, and the molding resin injected from the injection port being The inside of the first resin cover, the inside of the second resin cover, and the periphery of the stator winding are filled, and the molding resin filled in the injection port and its inside is removed from the first resin cover. Characterized by

In this molded motor, the first resin cover is attached to the core so as to cover one end of the stator winding, and the second resin cover is attached to the core so as to cover the other end of the stator winding.

A method of manufacturing a molded motor according to the present invention includes a core, a stator winding wound around the core, a first resin cover covering one end of the stator winding, and a first resin cover covering the other end of the stator winding. 2 resin covers, wherein the first resin cover is provided with an injection port used for injection of molding resin, the method for manufacturing a molded motor having a stator, the method for manufacturing a molded motor having a stator covering one end of a stator winding Then, the first resin cover is attached to the core, the second resin cover is attached to the core so as to cover the other end of the stator winding, the mold resin is injected from the injection port, and the inside of the first resin cover and the second resin cover are covered. The interior of the resin cover and the periphery of the stator windings are filled with molding resin, and the molding resin filled in the injection port and its interior is removed from the first resin cover.

According to the molded motor and the manufacturing method thereof according to the present invention, the first resin cover is attached to the iron core so as to cover one end of the stator winding, and the second resin cover is attached so as to cover the other end of the stator winding. is attached to the iron core, the mold resin is injected from the injection port of the first resin cover, the inside of the first resin cover, the inside of the second resin cover, and the circumference of the stator winding are filled with the mold resin, and the injection port and The mold resin filled inside is removed from the first resin cover to manufacture the molded motor.
As a result, it is possible to manufacture a molded motor filled with molding resin by molding the stator winding wound around the iron core of the stator with resin without using a mold for molding. .

2 is a cross-sectional view showing a cross-sectional configuration of a stator of the molded motor according to Embodiment 1; FIG. 2 is a perspective view showing the configuration of a resin cover in the molded motor according to Embodiment 1; FIG. 2 is a cross-sectional view showing a cross-sectional configuration of a stator of the molded motor according to Embodiment 1; FIG. 2 is a configuration diagram showing the external configuration of the stator of the molded motor according to Embodiment 1; FIG. FIG. 4 is a cross-sectional view showing the configuration of a mold when a molded motor is produced; FIG. 4 is a cross-sectional view showing how molding resin is injected into a mold; FIG. 4 is a cross-sectional view showing a cross-sectional configuration of a stator of a molded motor manufactured using a mold; 1 is a configuration diagram showing an external configuration of a molded motor manufactured using a mold; FIG.

A molded motor and a method for manufacturing the same according to the present embodiment will be described below with reference to the drawings. In addition, in each figure, the same code|symbol is attached|subjected to the same part.

Embodiment 1.
A molded motor and a manufacturing method thereof according to Embodiment 1 will be described below with reference to FIGS. 1 to 4. FIG.

First, the basic configuration of the stator 100 of the molded motor and the injection of the mold resin 200 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG.
FIG. 1 is a cross-sectional view showing a cross-sectional configuration of a stator 100 of a molded motor according to Embodiment 1. FIG. 2 is a perspective view showing the configuration of the resin cover in the molded motor according to Embodiment 1. FIG.

In (a) of FIG. 1, a stator 100, which is a main component of a molded motor, mainly includes a stator core (hereinafter referred to as "core") 110, a stator winding 120, a winding frame 130, It has Iron core 110 is composed of laminated electromagnetic steel sheets. The stator winding 120 is wound around the iron core 110 within two winding frames 130 . An end of the stator winding 120 is led out as a lead wire 125 to the outside.

(a) of FIG. 1 shows a state before the first resin cover 310 and the second resin cover 320 are attached to the iron core 110 .

As shown in FIG. 2(a), the first resin cover 310 has a cylindrical main body covering one end of the stator winding 120 (near the coil end 120e on the upper end side in FIG. 1(a)). 310a and a cylindrical injection port 310b used for injection of molding resin are provided.

Although the shape of the main body portion 310a is shown as a square shape as a specific example, it may be determined according to the shape of one end of the stator winding 120. FIG. The outer shape of main body portion 310 a may be determined according to the shape required for one end portion of stator 100 .
Although a cylindrical shape is shown as a specific example of the shape of the injection port 310b, any shape suitable for injection of the mold resin 200 may be determined.
The first resin cover 310 is further provided with a protrusion 311 for positioning that matches a recess (not shown) provided in the iron core 110, and a wiring hole 313 for leading out the lead wire 125 to the outside.

As shown in FIG. 2(b), the second resin cover 320 is formed in the shape of a box with an open top and a bottom, and the other end of the stator winding 120 (on the lower end side in FIG. 1(a)) (near the coil end 120e).
Although the shape of the second resin cover 320 is shown as a square shape as a specific example, it may be determined according to the shape of the other end of the stator winding 120 . The outer shape of the second resin cover 320 may be determined according to the shape required for the other end portion of the stator 100 .
The second resin cover 320 is provided with a protrusion 321 for positioning that matches a recess (not shown) provided in the iron core 110 .

(b) of FIG. 1 shows a state in which the first resin cover 310 and the second resin cover 320 are attached to the iron core 110 .
The first resin cover 310 is attached to the upper end of the iron core 110 by bonding the protrusion 311 and the recess (not shown) of the iron core 110 , and bonding the adhesive portion 410 to the upper end of the iron core 110 .
The second resin cover 320 is attached to the lower end portion of the iron core 110 by bonding with the bonding portion 420 by fitting the convex portion 321 and the concave portion (not shown) of the iron core 110 .
The internal space of first resin cover 310 and the internal space of second resin cover 320 are defined to include at least coil end 120 e that is the end of stator winding 120 .

(c) of FIG. 1 shows how the mold resin 200 is injected in a state where the first resin cover 310 and the second resin cover 320 are attached to the iron core 110 .
The mold resin 200 is injected from the inlet 310b of the first resin cover 310, and injected into the inside of the main body portion 310a of the first resin cover 310, the circumference of the stator windings 120, and the inside of the second resin cover 320. be done. In (c) of FIG. 1 , the area filled with fine dots indicates that the mold resin 200 is filled. That is, the mold resin 200 is formed by the first resin cover 310 and the second resin cover 320 without using a mold.

Next, shaping of the stator 100 of the molded motor according to Embodiment 1 after injection of the mold resin 200 will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a cross-sectional view showing a cross-sectional configuration of stator 100 of the molded motor according to Embodiment 1. As shown in FIG.
As shown in FIG. 3, in the stator 100 after the mold resin 200 is injected, the injection port 310b of the first resin cover 310 into which the mold resin 200 is injected is removed by cutting or the like, and the mold resin 200 is injected. A region below the body portion 310a of the first resin cover 310 in the folded state is left.

FIG. 4 is a configuration diagram showing an external configuration of stator 100 of the molded motor according to Embodiment 1. As shown in FIG.
As shown in FIG. 4, one end of the stator winding 120 (see FIG. 3) is covered with a main body portion 310a of a first resin cover 310 into which the molding resin 200 is injected, so that the first resin portion 160a is covered with the main body portion 310a. Configure.
The other end of the stator winding 120 (see FIG. 3) is covered with a second resin cover 320 into which the mold resin 200 is injected to form a second resin portion 160b.
The lead wire 125 is led to the outside through the wiring hole 313 , and the portion where the lead wire 125 and the wiring hole 313 are in contact is adhered by the adhesive portion 430 .

Most of the surface of the first resin portion 160a is the surface of the main body portion 310a of the first resin cover 310, and it is easier to create a smooth and uniform state than the exposed surface of the mold resin using a conventional mold.

A portion of the surface of the first resin portion 160a has the injection port 310b removed and the mold resin 200 inside is exposed. It is easier to create a smooth and uniform surface than the exposed surface of mold resin using a mold.

The surface of the second resin portion 160b is the surface of the second resin cover 320, and it is easier to create a smooth and uniform state than the surface of the mold resin exposed state using a conventional mold.

That is, the surface of the first resin portion 160a in FIG. 4 is the first resin cover 310 itself, and the surface of the second resin portion 160b is the second resin cover 320 itself. The surface of the portion 150a is the surface of the mold resin injected into the mold, and may have unevenness such as scratches, air bubbles, and fine unevenness.

When injecting the mold resin 200 using the conventional mold 10 as shown in FIG. 6, the mold resin 200 must be mixed, stirred, It was necessary to repeat the defoaming operation about three times.
On the other hand, when the mold resin 200 is injected into the inside of the first resin cover 310 and the second resin cover 320 as shown in FIG. Workability is improved because it is sufficient to carry out the operation.

[Effect obtained by the embodiment]
According to the molded motor and its manufacturing method according to the first embodiment, the first resin cover 310 is attached to the core so as to cover one end of the stator winding 120, and the second resin cover 310 is attached so as to cover the other end of the stator winding 120. 2. The resin cover 320 is attached to the iron core, and the mold resin 200 is injected from the injection port 310b of the first resin cover 310 so that the inside of the first resin cover 310, the inside of the second resin cover 320, and the circumference of the stator winding 120 are formed. is filled with the mold resin 200, and the injection port 310b and the mold resin 200 filled therein are removed from the first resin cover 310 to manufacture the stator 100 of the molded motor.

As a result, the stator winding 120 wound around the iron core 110 of the stator 100 is molded with the mold resin 200 without using the mold 10 for molding, and the molded motor filled with the mold resin 200 is produced. manufacturing becomes possible.

Further, according to Embodiment 1, the expensive mold 10 becomes unnecessary, the work of assembling and disassembling the mold 10 does not occur, and the work of removing grease from the finished product using the mold 10 does not occur. .

In addition, when the shape of the stator 100 is changed, it is not necessary to remake the mold 10 as in the conventional case, and the first resin cover 310 and the second resin cover 320 can be changed. Therefore, it is easy to deal with design changes. become.

In the above description of the first embodiment, the shape of the stator 100 of the molded motor is not limited to the specific examples shown in FIGS. 1 to 4, and various changes and modifications are possible.

In the molded motor of the first embodiment, the mold resin is molded using the resin cover without using a mold for molding, and the stator 100 molded in a good condition by the mold resin 200 is manufactured. It is possible to respond quickly to various uses because it can easily cope with design changes.

10 mold, 11 upper mold, 12 middle mold, 13 lower mold 13, 14 bottom mold 14, 100, 100A stator of molded motor, 110 iron core, 120 stator winding, 120e coil end, 125 lead wire, 130 windings Line frame 150a First resin portion 150b Second resin portion 160a First resin portion 160b Second resin portion 200 Mold resin 310 First resin cover 310a Body portion 310b Inlet 311 Convex portion 313 Wiring hole 320 Second resin cover 321 Convex portion 410, 420, 430 Bonding portion.

Claims (3)

A molded motor having a stator (100),
The stator (100) is
an iron core (110);
a stator winding (120) wound around the iron core (110);
a first resin cover (310) covering one end of the stator winding (120);
a second resin cover (320) covering the other end of the stator winding (120);
The first resin cover (310) is provided with an injection port (310b) used for injection of the molding resin (200),
The mold resin (200) injected from the injection port (310b) flows inside the first resin cover (310), inside the second resin cover (320), and around the stator winding (120). and is filled with
A molded motor, wherein the injection port (310b) and the molding resin (200) filled therein are removed from the first resin cover (310). The first resin cover (310) is attached to the iron core (110) so as to cover one end of the stator winding (120),
The second resin cover (320) is attached to the iron core (110) so as to cover the other end of the stator winding (120).
The molded motor according to claim 1. An iron core (110), a stator winding (120) wound around the iron core (110), a first resin cover (310) covering one end of the stator winding (120), and the stator winding. a second resin cover (320) covering the other end of the wire (120);
A method for manufacturing a molded motor having a stator (100) in which an injection port (310b) used for injecting a molding resin (200) is provided in the first resin cover (310),
attaching the first resin cover (310) to the iron core (110) so as to cover one end of the stator winding (120);
attaching the second resin cover (320) to the iron core (110) so as to cover the other end of the stator winding (120);
The mold resin (200) is injected from the injection port (310b), and the inside of the first resin cover (310), the inside of the second resin cover (320), and the circumference of the stator winding (120) are filled. is filled with the mold resin (200),
removing the injection port (310b) and the mold resin (200) filled therein from the first resin cover (310);
A method for manufacturing a molded motor.

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