KR20060084140A - Double rotor type motor - Google Patents

Abstract

The present invention relates to a double rotor-type motor, the motor of the present invention comprises a rotating shaft rotatably installed in the motor mounting portion of the device; An outer rotor in which magnets having N poles and S poles are alternately arranged along the circumferential direction at a position spaced from the center of the rotation shaft, and a circumference at a position spaced a predetermined distance from the center of the rotation shaft inside the outer rotor A rotor assembly including an inner rotor in which magnets having an N pole and an S pole are alternately arranged along a direction, the center of the rotor being coupled to the rotating shaft to rotate together with the rotating shaft; A core made of a metal material, an insulator made of an insulating resin material surrounding the core so that the mutually opposed first and second surfaces of the core are exposed to the outside, a coil wound around the outer surface of the insulator, and the insulator is circular And a circular mold part made of a resin material which integrally surrounds the insulator and the coil by insert molding so that the first and second surfaces exposed to the outside of the core are exposed to the outside. And a stator disposed between the outer rotor and the inner rotor such that the first and second surfaces of the core exposed to the outside face each other while maintaining a predetermined gap with the magnets of the outer rotor and the inner rotor. . According to the present invention, since the inner rotor and the outer rotor are configured on the inside and the outside, respectively, around the stator surrounded by the mold part, the output of the motor can be greatly increased without greatly increasing the size and weight of the motor. It can provide waterproof performance.

Motor, BC, Outer Rotor, Inner Rotor, Stator, Core, Insulator, Mold

Description

Motor of Dual Rotor Type

1 is a vertical cross-sectional view schematically showing a structure of a drum washing machine to which a conventional outer rotor type motor is applied as a prior art.

Figure 2 is a perspective view showing the structure of the stator of the conventional outer rotor type motor

Figure 3 is a longitudinal sectional view schematically showing the structure of a double rotor-type motor according to the present invention

4 is an exploded perspective view of the double rotor type motor of FIG. 3.

FIG. 5 is a perspective view of the stator of the dual rotor type motor of FIG. 3 viewed from another direction. FIG.

FIG. 6 is a plan view illustrating a structure of a state in which a mold part of the stator of FIG. 5 is removed. FIG.

7 is an exploded perspective view showing a structure of a state in which the mold portion of the stator of FIG. 5 is removed;

8 is an exploded perspective view showing another embodiment of the stator of the dual rotor type motor according to the present invention.

Figure 9 is a cross-sectional view showing another embodiment of the stator of the dual rotor type motor according to the present invention.

Explanation of symbols on the main parts of the drawings

2a: bearing housing 4: rotating shaft

10: outer rotor 11: magnet

20: inner rotor 21: magnet

30: stator 31: single split core

31a: shoe 32: insulator

32a: lower insulator 32b: upper insulator

33: mold 34: coil

35: fixing part 35a: fastening hole

35b: Positioning groove 37: Connector

38: Hall sensor mounting portion 40: Bushing

41: bushing side serration part 50: hall sensor unit

51: Hall sensor

The present invention relates to a motor, and more particularly, a brushless BLDC (BLDC) having a double rotor structure to improve torque by installing two rotors on both sides of a stator fixed to a device such as a washing machine. DC) relates to a motor.

In general, the drum washing method is a method in which the laundry is performed using the friction force of the rotating drum and the laundry by receiving the driving force of the motor while the detergent, the washing water, and the laundry are put in the drum. These don't get tangled with each other, and can be washed and pounded.

The conventional drum washing machine has an indirect connection method in which the driving force of the motor is indirectly transmitted to the drum through a belt wound around the motor pulley and the drum pulley, and the rotor of the BLDC motor is directly connected to the drum, depending on the driving method. It is divided into direct type that transmits driving force.

Here, the driving force of the motor is transmitted directly through the belt wound around the motor pulley and the drum pulley, instead of being directly transmitted to the drum, energy loss occurs in the driving force transmission process, and a lot of noise is generated in the power transmission process.

Therefore, in order to solve such problems of the conventional drum washing machine, the use of a direct drum washing machine using a BLDC motor is increasing.

Referring to Figure 1 briefly look at the structure of a conventional drum washing machine.

As shown in FIG. 1, a tub 2 is installed inside the cabinet 1, and a drum 3 is rotatably installed in the center of the tub 2.

In addition, a motor including a stator 6 and a rotor 5 is installed at the rear side of the tub 2, and the stator 6 is fixed to the rear wall of the tub, and the rotor 5 is the stator 6. It is installed to axially connect to the drum (3) through the tub while wrapping. Although not shown in detail in the drawing, magnets are alternately arranged with opposite polarities on the inner circumferential surface of the rotor 5.

In addition, between the tub rear wall and the stator is substantially the same shape as the outer shape of the rear wall portion of the tub (2) is fixed to the tub rear wall when the stator is fastened to support the load of the stator and the concentricity of the stator The metal tub supporter (not shown) which keeps) is interposed.

Meanwhile, a door 7 is installed in front of the cabinet 1, and a gasket 8 is installed between the door 7 and the tub 2.

In addition, a hanging spring 9a for supporting the tub 2 is installed between the inside of the upper surface of the cabinet 1 and the upper side of the outer peripheral surface of the tub 2, and the inside of the lower surface of the cabinet 1 and the tub. (2) A friction damper 9b for damping the vibration of the tub 2 generated during dehydration is provided between the lower side of the outer peripheral surface.

2 is a perspective view illustrating the structure of the stator 6 of the motor of FIG. 1. The conventional stator 6 includes a metal core 6a and an insulator made of a resin material surrounding the core 6a. 6b) and a coil 6c wound around the insulator 6b.

The core 6a of the stator 6 has a tooth (6aa) and a base (not shown) for connecting the teeth by pressing a metal iron plate, and at the same time to form a fastening hole (6e) in the base (6ab) After the unit cores having the protrusions 6d are manufactured, they are manufactured by laminating them.

However, the conventional motor as described above has a limitation in increasing the output since it uses one rotor.

In other words, as the capacity of a washing machine increases in recent years, the output of the motor for rotating the drum must also increase. Thus, in order to increase the output of the motor, the size of the rotor and the stator must be enlarged, which causes the size and weight of the motor. There was a problem that is greatly increased.

In order to solve the above problem, the present applicant has wound the coil inside and outside of the stator in Korea Patent Publication No. 2001-0097204 (2001.11.08), and has an inner rotor and a predetermined gap inside and outside of the stator. We propose a motor that can increase the output by constructing the outer rotor in duplicate.

However, since the motor does not present a concrete configuration of the stator, that is, a method of configuring the stator core and an efficient structure for mounting the insulator on the core, there is a problem in that a dual rotor type motor cannot be realized.

In addition, since the motor has a structure in which the coil of the stator is exposed to the outside, when applied to a device using water such as a washing machine, there is a problem that the stator may be damaged due to water splashing if the waterproofing is not properly performed. .

The present invention is to solve the above problems, it is an object of the present invention to provide a dual rotor type motor of an efficient structure that can significantly increase the output of the motor without increasing the size and weight of the motor.

Another object of the present invention is to provide a dual rotor type motor which can be easily applied to an apparatus such as a washing machine and easily fixed to the apparatus by having a stator having excellent waterproofness.

In order to achieve the above object, the present invention includes a rotating shaft rotatably installed in the motor mounting portion of the device; An outer rotor in which magnets having N poles and S poles are alternately arranged along the circumferential direction at a position spaced from the center of the rotation shaft, and a circumference at a position spaced a predetermined distance from the center of the rotation shaft inside the outer rotor A rotor assembly including an inner rotor in which magnets having an N pole and an S pole are alternately arranged along a direction, the center of the rotor being coupled to the rotating shaft to rotate together with the rotating shaft; A core made of a metal material, an insulator made of an insulating resin material surrounding the core so that the mutually opposed first and second surfaces of the core are exposed to the outside, a coil wound around the outer surface of the insulator, and the insulator is circular And a circular mold part made of a resin material which integrally surrounds the insulator and the coil by insert molding so that the first and second surfaces exposed to the outside of the core are exposed to the outside. A double rotor type motor including a stator disposed between the outer rotor and the inner rotor such that the first and second surfaces of the core exposed to the outside face each other with a constant gap between the magnets of the outer rotor and the inner rotor. To provide.

According to another embodiment of the present invention, there is provided a rotating shaft, which is rotatably installed in a motor mounting portion of the apparatus; An outer rotor in which magnets having N poles and S poles are alternately mounted in a circumferential direction at a position spaced from a center of the rotation shaft, and a circumference at a position spaced a predetermined distance from the center of the rotation shaft inside the outer rotor A rotor assembly including an inner rotor alternately mounted with magnets having an N pole and an S pole along a direction, the center of the rotor being coupled to the rotating shaft to rotate together with the rotating shaft; A single split core made of a metal material, each divided into individual pieces, an insulator made of an insulating material surrounding the single split core such that mutually opposed first and second surfaces of the single split core are exposed to the outside; The coil wound around the outer surface of the insulator, and the insert and the entire part of the insulator and the coil are exposed to the outside so that the first surface and the second surface exposed to the outside of the single split core in the state that the insulator is arranged in a circular manner A resin part integrally enclosed and a fixing part fixedly fixed to the motor mounting part by being integrally extended radially in the mold part and fixed to the motor mounting part. It is disposed between the outer rotor and the inner rotor so that two surfaces face each other with a predetermined gap between the magnets of the outer rotor and the inner rotor. Is a double rotor type motor is provided configured to include a stator.

According to the present invention as described above, since the rotor is disposed on both sides of the stator and rotates simultaneously, the torque of the motor can be greatly increased. In addition, since an insulator, a coil, and the like of the stator are supported in a state surrounded by a mold part, it can be easily fixed to the device, and an advantage of very excellent waterproofness can also be obtained.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the double rotor type motor according to the present invention.

First, an embodiment of a double rotor type motor according to the present invention will be described with reference to FIGS. 3 to 7.

For the sake of understanding, the dual rotor type motor of the present invention will be described with an example applied to a washing machine. However, the dual rotor type motor of the present invention may be equally or similarly applied to other devices as well as to a washing machine.

3 and 4, a rotating shaft 4 for driving the drum 3 is rotatably installed in the center of the rear portion of the tub 2 (see FIG. 1) of the washing machine. Here, the rotary shaft 4 is supported in a rotatable state by a bearing 2b inside the bearing housing 2a installed at the rear of the tub 2.

The bearing housing 2a is provided with a motor for driving the rotating shaft 4. The motor is a stator 30 fixed to the bearing housing (2a), the outer rotor 10 is installed so as to maintain a predetermined gap on the outside and the inside of the stator 30 and the end of the rotating shaft (4) and The inner rotor 20 is formed. The outer rotor 10 and the inner rotor 20 is preferably made of a metal material, it may be made of an injection material of a resin material.

The outer rotor 10 is formed in a disc shape in which a bushing 40 made of a resin material coupled to the rotation shaft 4 is fixed to a central portion thereof. The bushing 40 is fixed to the center portion of the outer rotor 10 by a fastening means such as bolt 42, but may be integrally formed on the outer rotor in the same manner as the insert injection.

In addition, the bushing 40 has a hole in which the rotation shaft 4 is inserted in the center thereof, and a bushing side serration portion 41 coupled to the inner peripheral surface of the hole with the serration portion 4a of the outer peripheral surface of the rotation shaft 4. ) Is formed.

On the inner circumferential surface of the outer rotor 10, a plurality of magnets 11 having N poles and S poles are alternately arranged.

The inner rotor 20 has a ring shape with an open center, and is coupled to form the concentric with the outer rotor 10. A plurality of magnets 21 having an N pole and an S pole are alternately formed on an outer circumferential surface thereof. Are arranged.

Meanwhile, as illustrated in FIGS. 3 to 5, the stator 30 includes a plurality of single split cores 31 formed as individual bodies and an insulator 32 made of an insulating resin material surrounding the single split core 31. And a resin part 33 which is integrally supported while surrounding the insulator 32 and the coil 34 by an insert mold and a coil 34 wound on an outer surface of the insulator 32. )

The mold part 33 has a circular shape and has a single split core 31 on each of an inner side and an outer side facing the magnet 11 of the outer rotor 10 and the magnet 21 of the inner rotor 20. Is exposed to the outside.

In addition, the mold part 33 is formed such that the fixing part 35 for coupling with the bearing housing 2a is integrally extended radially inward at an end portion adjacent to the bearing housing 2a.

A plurality of fastening holes 35a are formed at an inner end of the fixing part 35 at a position corresponding to the bolt fastening holes 2c of the bearing housing 2a at predetermined intervals.

In addition, the stator 30 should be coupled with the correct concentricity with respect to the rotation axis (4). To this end, as shown in FIG. 3, a plurality of positioning protrusions 2d are formed to protrude at predetermined intervals on one side of the bolt fastening hole 2c of the bearing housing 2a, and the mold part 33 Preferably, the fixing groove 35 is formed with a positioning groove 35b into which the positioning protrusion 2d is correspondingly inserted. The positioning groove 35b may be formed as a through hole formed to penetrate the fixing part 35.

Of course, a positioning groove may be formed in the bearing housing 2a and a positioning protrusion may be formed in the fixing part 35.

The positioning projection 2d is composed of a body portion having a constant diameter and a guide portion which is formed in a substantially conical shape at the end of the body portion so that the positioning projection can be easily inserted into the positioning groove 35b. In addition, the positioning groove (35b) is preferably made of almost the same shape and size as the positioning projection (2d) so that the positioning projection (2d) is inserted and fit snugly without shaking. That is, the positioning groove (35b) is a portion in which the body portion of the positioning projection (2d) is inserted into a straight portion of constant diameter correspondingly, the portion of the guide portion at the end of the positioning projection (2d) is inserted into a conical shape It is preferable to form an inclined portion.

In addition, it is preferable that the positioning groove 35b of the fixing part 35 has a diameter smaller than that of the fastening hole 35a.

Around the fastening hole 35a of the fixing part 35, strictly speaking, the part where the head of the bolt 39 touches is preferably formed to protrude slightly from other parts.

As shown in FIG. 4, a plurality of reinforcing ribs 33a are formed on the outer surface of the mold part 33 to reinforce strength. The reinforcing rib 33a is preferably formed to extend to the outer surface of the fixing part 35 of the mold part 33.

In addition, in order to reinforce the strength of the mold part 33, in particular, the fixing part 35 of the mold part 33, the inner rotor 20 is also rotated on the inner surface of the fixing part 35 of the mold part 33. It is preferable that the reinforcing rib 35c is formed within a range that does not interfere. Of course, as described above, the strength of the mold part 33 may be closely coupled to the inner or outer surface of the mold part 33 by a ring-shaped metal reinforcing bracket (not shown) without forming the reinforcing rib 35c. You might be able to increase it.

The mold part 33 is integrally formed with a connector 37 for supplying power to each coil 34 of the stator 30.

In addition, one side of the mold 33 is integrated with a hall sensor mounting unit 38 on which a hall sensor unit 50 is mounted to detect the position of the magnet 21 of the inner rotor 20. Is formed. The Hall sensor mounting portion 38 is formed with an insertion hole 38a into which the sensor terminal 51 of the Hall sensor unit 50 is inserted. The insertion hole 38a may be formed to penetrate the inner surface of the mold part 33. Alternatively, the insertion hole 38a does not penetrate the inner surface of the mold part 33 and the sensor terminal 51 is inner. It may be formed only to be in contact with the magnet 21 of the rotor 20.

Of course, unlike this embodiment, the sensor terminal 51 may be installed to detect the position of the magnet 11 of the outer rotor 10.

Although not shown in the drawing, it is preferable that the plurality of cooling holes are formed in the mold part 33 so that the heat generated when driving the motor is discharged to the outside.

On the other hand, as shown in Fig. 6 and 7, the core constituting the stator 30 is composed of a single split core 31, each divided into individual pieces. Here, the single split core 31 is formed in a substantially I-shape, but may be used independently of one formed in a T-shape, or may be used as a pair to face each other.

In addition, the insulator 32 is composed of two parts, a lower insulator 32a and an upper insulator 32b coupled to the upper portion of the lower insulator 32a. The lower and upper insulators 32a and 32b may be mutually coupled in a known hook coupling manner or the like. Of course, the insulators 32a and 32b may alternatively be configured to surround the single split cores 31 while being integrally formed by insert injection.

The upper and lower insulators 32a and 32b connect the insulator while integrally connecting the inner end of each of the core accommodating portions 32c and the core accommodating portion 32c separately accommodating the single split core 31. It consists of the connection part 32d formed in a circular shape. Unlike this embodiment, the connecting portion may connect the core accommodation portion 32c integrally by connecting the outer end of the core accommodation portion 32c.

The core accommodating part 32c of the lower and upper insulators 32a and 32b is formed such that the inner and outer ends of the core accommodating part 32c are open, respectively, so that the shoes 31a of both ends of the single split core 31 are exposed to the outside. have.

In addition, the coil 34 wound around each core accommodating part 32c of the insulator 32 may use an enamel coated copper wire.

The stator 30 configured as described above is manufactured as follows.

First, a single split core 31 is seated on each core accommodating portion 32c of the lower insulator 32, and the upper insulator 32 is coupled to the upper side of the lower insulator 32. Subsequently, the coil 34 is wound around the core receiving portion 32c of the insulator 32 using a winding machine.

As described above, when the coil 34 is wound around the insulator 32, the insulator 32 is inserted into a mold, and resin is injected to form the mold part 33.

At this time, it is preferable that the resin material forming the mold part 33 has a melting point lower than the melting point of the enamel of the coil 34 and the melting point of the material of the insulator. This is to prevent the resin forming the mold part 33 from damaging the enamel coating and the insulator 32 of the coil 34 in the molding process.

Unlike the above-described embodiment, the lower and upper insulators 32 may be made of an individual body, which is not connected to each other and is independently divided. In this case, since both the single split core 31 and the insulator are made of independent entities, when the coil 34 is wound, interference with other insulators is eliminated, so that high-speed windings can be obtained.

In addition, as shown in another embodiment of the stator in FIG. 8, when both the single split core and the insulator are made of independent entities, the middle portion of the single split core is divided into the first single split core 131a and the second single split core. The first single splitting core 131a and the second single splitting core (131a) are divided into two parts of the 131b, and the insulator 132 is not integrally formed by the upper and lower insulators, but is integrally formed through both openings of the insulator 132. 131b) may be inserted and then fixed by caulking or the like.

At this time, the split surfaces of the first and second single split cores 131a and 131b are preferably formed to be bent in an L shape. This is to ensure a stable coupling force by increasing the coupling area of the core. .

FIG. 9 shows another embodiment of the core constituting the stator 30. The stator core of this embodiment includes a plurality of teeth 231c extending radially outwardly and the teeth 231c. An outer core 231a (outer core) formed of a base 231d for integrally connecting inner ends thereof; The inner core 231b is formed of a plurality of teeth 231e extending radially inward and a base 231f integrally connecting the outer ends of the teeth 231e to each other.

The insulator surrounding the outer core 231a and the inner core 231b may include a first insulator 232a surrounding the outer core 231a and a second insulator 232b surrounding the inner core 231b. Is made of. The first and second insulators 232a and 232b may be formed to be separated from each other, but are preferably formed to be integrally integrated with each other. Of course, even when the first and second insulators 232a and 232b are integrally formed, a partition wall is formed between the first and second insulators 232a and 232b so that the outer core 231a and the inner core 231b can be separated. Preferably formed.

In addition, the first and second insulators 232a and 232b are made up of an upper insulator and a lower insulator similar to the insulator of the above-described embodiment, and are integrated by a combination of upper and lower insulators.

When the stator core is composed of the outer core 231a and the inner core 231b as described above, each of the cores 231a and 231b has a plurality of metals having the shapes of the teeth 231c and 231e and the bases 231d and 231f. The core may be manufactured by stacking plates.

In addition, the outer core 231a and the inner core 231b are spirals formed by laminating a strip-shaped metal plate having the shapes of the teeth 231c and 231e and the bases 231d and 231f, respectively, in a spiral manner. It may be made of a spiral core.

Of course, unlike the foregoing, the outer core 231a and the inner core 231b each have a plurality of teeth 231c and 231e and a plurality of metals having arc-shaped bases 231d and 231f interconnecting them. The plates may be stacked to form a plurality of split cores, and the split cores may be interconnected to form a circular shape.

Meanwhile, in the above-described embodiments of the motor, the stator 30 of the motor has been described as being mounted on the bearing housing 2a of the washing machine. However, the stator 30 of the motor may be fixed to the rear surface of the tub 2 (see FIG. 1). It can be mounted concentrically with the rotating shaft 4 in the part.

In addition, the motor of the present invention may exhibit excellent performance when applied to a washing machine because the stator itself has excellent waterproofness by the mold part 33, but may be applied to the air conditioner or other devices in the same or similar manner. .

 Thus, according to the present invention, since the inner rotor and the outer rotor are configured on the inside and the outside, respectively, around the stator surrounded by the mold part, the output of the motor can be greatly increased without greatly increasing the size and weight of the motor.

In particular, according to the present invention, since the core, the insulator, and the like of the stator have a structure supported by the mold part, it is easy to configure a fixing part for fixing the stator to an apparatus such as a washing machine.

In addition, since the mold part surrounds the core of the stator, the outside of the insulator and the coil, the water resistance of the stator is excellent. Therefore, when applied to a device that uses water, such as a washing machine, water shortens in the stator so that a short circuit, etc. rarely occurs, and durability may be improved.

Claims (43)

A rotating shaft rotatably mounted to the motor mounting portion of the apparatus; An outer rotor in which magnets having N poles and S poles are alternately arranged along the circumferential direction at a position spaced from the center of the rotation shaft, and a circumference at a position spaced a predetermined distance from the center of the rotation shaft inside the outer rotor A rotor assembly including an inner rotor in which magnets having an N pole and an S pole are alternately arranged along a direction, the center of the rotor being coupled to the rotating shaft to rotate together with the rotating shaft; A core made of a metal material, an insulator made of an insulating resin material surrounding the core so that the mutually opposed first and second surfaces of the core are exposed to the outside, a coil wound around the outer surface of the insulator, and the insulator is circular And a circular mold part made of a resin material which integrally surrounds the insulator and the coil by insert molding so that the first and second surfaces exposed to the outside of the core are exposed to the outside. A double rotor type motor including a stator disposed between the outer rotor and the inner rotor such that the first and second surfaces of the core exposed to the outside face each other with a constant gap between the magnets of the outer rotor and the inner rotor. . 2. The dual rotor type motor of claim 1, wherein the cores consist of a single split core each divided into individual pieces. The dual rotor type motor of claim 2, wherein each of the single split cores has a T-shape. 3. The dual rotor type motor of claim 2, wherein each of the single split cores has an I-shape. 3. The dual rotor type motor of claim 2, wherein each of the single split cores is divided into at least two parts and integrally coupled to each other inside the insulator. The method of claim 1, wherein the core, An outer core having a first surface facing the magnet of the outer rotor and having a plurality of teeth extending radially, and a base for integrally connecting the inner ends of the teeth with each other; Dual rotor type motor comprising a plurality of teeth extending radially and having a second surface facing the magnet of the inner rotor, and an inner core made of a base for integrally connecting the outer ends of the teeth. The dual rotor type motor of claim 6, wherein the outer core and the inner core are tubular cores formed by stacking a plurality of metal plates each having the shape of the teeth and the base. 7. The dual rotor type motor of claim 6, wherein the outer core and the inner core are spiral cores formed by laminating a strip-shaped metal plate having the form of the teeth and the base in a spiral manner. . The method of claim 6, wherein the outer core and the inner core is formed by stacking a plurality of metal plates each having a plurality of teeth and an arc-shaped base interconnecting them to form a plurality of split cores, interconnecting the split cores Double rotor-type motor, characterized in that formed by forming in a circle. 3. The dual rotor type motor of claim 1 or 2, wherein the insulator is divided into individual pieces to individually receive each core. The double rotor type motor of claim 1, wherein the insulators are integrally connected to each other. 12. The dual rotor type motor of claim 11, wherein the insulators have inner ends connected integrally with each other. 12. The dual rotor type motor of claim 11, wherein the insulators have outer ends connected integrally with each other. The dual rotor type motor of claim 1, wherein the insulator comprises a first insulator for accommodating a part of the core, and a second insulator for accommodating the remaining part of the core and coupled to one side of the first insulator. . 7. The double rotor type motor of claim 6, wherein the insulator surrounding the core comprises a first insulator portion surrounding the outer core and a second insulator portion surrounding the inner core. 7. The dual insulator of claim 6, wherein the insulator surrounding the core comprises an upper insulator portion surrounding the upper portion of the outer core and the inner core, and a lower insulator portion surrounding the lower portion of the outer core and the inner core. Rotor type motor. The dual rotor type motor of claim 16, wherein a partition wall separating the outer core and the inner core is integrally formed at an intermediate portion of the upper and lower insulators. 7. The dual rotor type motor of claim 6, wherein the insulator surrounding the core is divided into a first insulator portion surrounding the outer core and a second insulator portion surrounding the inner core. The outer core and the inner core of claim 6, wherein the insulator surrounding the core includes a first insulator portion surrounding the outer core, a second insulator portion surrounding the inner core, and the first and second insulators. A double rotor-type motor, characterized in that the partition wall separating the core is formed integrally. The dual rotor type motor of claim 1, wherein a fixing part for fixing the mold part to the motor mounting part is formed integrally with the mold part. 21. The dual rotor type motor of claim 20, wherein the fixing part extends radially inwardly at one end of the mold part. 21. The dual rotor type motor of claim 20, wherein the fixing part extends radially outwardly at one end of the mold part. 21. The method of claim 20, wherein a plurality of fastening holes are formed in the motor mounting portion, a plurality of fastening holes corresponding to the fastening holes are formed in the fixing portion, and the bolt is fastened through the fastening hole of the motor mounting portion and the fastening portion of the fixing portion. And the mold part of the stator is fixed to the motor mounting part. 24. The double rotor type motor of claim 23, wherein a periphery of the fastening hole of the fixing part to which the head of the bolt is connected is formed to protrude more than other portions of the fixing part. 24. The double rotor-type motor according to claim 20 or 23, further comprising a positioning unit for determining a fixed position of the mold portion relative to the motor mounting portion. The method of claim 25, wherein the positioning unit, At least one positioning protrusion formed to protrude from the motor mounting portion; A double rotor-type motor, characterized in that formed by the at least one positioning groove formed in the fixing portion of the mold portion so that the positioning projection correspondingly. The method of claim 25, wherein the positioning unit, At least one positioning protrusion formed to protrude from the fixing portion of the mold portion, The double rotor-type motor, characterized in that the positioning projection is formed in a recessed groove formed in the motor mounting portion to be correspondingly inserted. 28. The double rotor type motor of claim 26 or 27, wherein the positioning protrusion comprises a body portion having a constant diameter and a guide portion formed to be inclined in a conical shape at an end of the body portion. 29. The inclined groove of claim 28, wherein the positioning groove is formed to be inclined at the end of the straight portion in correspondence with the straight portion having a constant diameter corresponding to the body portion of the positioning protrusion, and the guide portion of the positioning protrusion. Double rotor-type motor, characterized in that consisting of parts. 27. The double rotor type motor of claim 26, wherein the positioning groove has a diameter smaller than a diameter of the fastening hole of the fixing part. The dual rotor type motor of claim 1, further comprising a reinforcing part for reinforcing the strength of the mold part. 32. The dual rotor type motor of claim 31, wherein the reinforcement part is formed of a plurality of reinforcement ribs integrally formed on an outer surface of the mold part. 21. The dual rotor type motor of claim 20, wherein a plurality of reinforcing ribs for reinforcing strength are integrally formed in the fixing part of the mold part. 21. The dual rotor type motor of claim 20, wherein a reinforcing bracket made of a metal in a ring shape is installed at a portion connecting the mold portion and the fixing portion to reinforce the fixing portion of the mold portion. The dual rotor type motor of claim 1, wherein a connector for supplying power to the coil is integrally formed with the mold part. The dual rotor type motor of claim 1, wherein a hall sensor is installed in the mold to detect a position of the magnet of the rotor assembly. 37. The dual rotor type motor of claim 36, wherein the hall sensor detects a position of a magnet of an inner rotor of the rotor assembly. 37. The dual rotor type motor of claim 36, wherein the hall sensor detects a position of a magnet of an outer rotor of the rotor assembly. The double rotor type motor of claim 1, wherein the coil is an enamel coated copper wire. 40. The dual rotor type motor of claim 39, wherein the mold part is made of a resin material having a melting point lower than the melting point of the enamel of the coil and the melting point of the insulator. The dual rotor type motor of claim 1, wherein at least one cooling hole is formed through the mold. A rotating shaft rotatably mounted to the motor mounting portion of the apparatus; An outer rotor in which magnets having N poles and S poles are alternately mounted in a circumferential direction at a position spaced from a center of the rotation shaft, and a circumference at a position spaced a predetermined distance from the center of the rotation shaft inside the outer rotor A rotor assembly including an inner rotor alternately mounted with magnets having an N pole and an S pole along a direction, the center of the rotor being coupled to the rotating shaft to rotate together with the rotating shaft; A single split core made of a metal material, each divided into individual pieces, an insulator made of an insulating material surrounding the single split core such that mutually opposed first and second surfaces of the single split core are exposed to the outside; The coil wound around the outer surface of the insulator, and the insert and the entire part of the insulator and the coil are exposed to the outside so that the first surface and the second surface exposed to the outside of the single split core in the state that the insulator is arranged in a circular manner A resin part integrally enclosed and a fixing part fixedly fixed to the motor mounting part by being integrally extended radially in the mold part and fixed to the motor mounting part. It is disposed between the outer rotor and the inner rotor so that two sides thereof face each other with a certain gap between the magnets of the outer rotor and the inner rotor. A double rotor-type motor configured to include a stator. 43. The double rotor type motor according to claim 1 or 42, wherein the device is a washing machine.

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