KR100720552B1 - washer - Google Patents

Abstract

The present invention relates to a washing machine that improves the structure of the driving unit of the washing machine, in particular, the rotor, so that the driving force of the motor is directly transmitted to the drum, thereby reducing noise, failure and energy waste, and enhancing durability and stability.

To this end, the present invention and the tub is wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a winding part wound and fixed to a rear wall of the tub; And a rotor including a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit a rotational force to the shaft. The frame includes a side wall portion and a rear wall portion, and provides a washing machine, which is formed of aluminum.

Washing machine, stator, rotor, direct type, bearing housing, rotor frame, aluminum

Description

Washing machine

1 is a vertical cross-sectional view showing a conventional drum washing machine driving unit configuration

Figure 2 is a longitudinal sectional view showing the main part of the drum washing machine configuration of the present invention

FIG. 3 is a right side view of FIG. 2 and shows a right side view of the motor removed.

4 is a partially cutaway perspective view of the rotor of FIG.

5 is a perspective view showing the stator of FIG.

6 is a perspective view of the connector of FIG.

7 is a bottom perspective view of FIG.

Explanation of symbols on the main parts of the drawings

2: Tub 200: rear wall

3: drum 4: shaft

400: serration 5: motor

6a, 6b: Front and rear bearing 7: Bearing housing

700: hub 701: fastening boss

702: Fastening groove 703: Self-aligned rib

703a: slope 8a, 8b: step

9a, 9b: Positioning step 10: Spider

11: Bushing 12: Sealing member

13: rotor 13a: rear wall

13b: side wall portion 13c: magnet

130: seating surface 131: through hole

132: hub 133: cooling fin

134: through 137: fastener

138: positioning hole 14: stator

140: frame 141: winding unit

142: coil 143: fastening rib

144: self-aligning rib 144a: slope

15a, 15b, 15c, 15d: Fastening member 16: Connector

160: positioning projection 161: reinforcing rib

162: fastener 163: hub

164: Serration 17: Tub Bracket

170: Fastener

The present invention relates to a drum washing machine, and more particularly to an improvement in the structure of the drive unit of the drum washing machine.

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 have a pounding and scrubbing wash effect.

Referring to Figure 1 briefly described a conventional drum washing machine structure as follows.

1 is a vertical cross-sectional view illustrating a conventional drum washing machine, in which a tub 2 is installed inside a cabinet 1 and a drum 3 is rotatably installed in the center of the tub 2.

In addition, a motor 5a is installed at a lower side of the tub 2, and a motor pulley 18 is axially connected to the motor 5a.

On the other hand, a drum shaft is installed behind the drum 3, and a drum pulley 19 is installed on the drum shaft.

In addition, the drum pulley 19 provided on the drum shaft and the motor pulley 18 connected to the motor 5a are connected by a belt 20 which is a power transmission element.

A door 21 is installed in front of the cabinet 1, and a gasket 22 is installed between the door 21 and the tub 2.

Meanwhile, a hanging spring 23 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 24 is provided between the lower side of the outer circumferential surface to damp the vibration of the tub 2 generated during dehydration.

However, in the conventional washing machine, the driving force of the motor 5a is drum by the belt pulley 18 connecting the motor pulley 18 and the drum pulley 19 and the motor pulley 18 and the drum pulley 19. Since it is delivered to (3), it has the following disadvantages.

First, since the driving force of the motor 5a is transmitted directly through the belt 20 wound around the motor pulley 18 and the drum pulley 19 instead of being directly transmitted to the drum 3, energy loss occurs in the driving force transmission process. .

In addition, since the driving force of the motor 5a is not directly transmitted to the drum 3 but is transmitted through many parts such as the motor pulley 18, the drum pulley 19, and the belt 20, a lot of noise is generated in the power transmission process. This will occur.

In addition, in order to transfer the driving force of the motor 5a to the drum 3, many parts such as the motor pulley 18, the drum pulley 19, the belt 20, and the like are required, thereby increasing the number of assembly operations of the product.

In addition, as described above, as many parts are required to transmit the driving force of the motor 5a to the drum 3, a failure occurrence point increases, and thus, a failure occurrence frequency also increases.

In short, the conventional drum washing machine is a method of indirectly transmitting the driving force of the motor (5a) to the drum (3) using a motor pulley, a drum pulley and a belt, there is a high possibility of failure and noise and a lot of energy waste, Furthermore, there were many problems such as causing a decrease in washing power.

On the other hand, in order to solve this problem, the present applicant has provided a direct type motor as a driving unit structure of the drum washing machine in the Republic of Korea Patent Application (Publication No. 10-2001-0037607).

In the above-described invention, the rotor frame is formed of a steel plate press working to transfer the rotational force of the rotor directly to the drum, while the iron plate itself can perform the function of the back yoke is formed without having a back yoke In order to solve the above problems of the indirect driving method, a rotor frame having a simple structure was provided.

However, such a steel plate rotor frame has a problem in that it is difficult to form a precision, especially concentricity, that is required at a thickness greater than a predetermined thickness due to the characteristics of press working. The street had a problem.

In addition, when a current flows in the stator coil, magnetic flux is generated. In order to form a passage through which the magnetic flux flows, that is, a magnetic path, a back yoke of a magnetic material having an appropriate thickness behind the magnet is required. Here, when the thickness of the back yoke is thin, the magnetic flux is saturated, and there is a limit of increase of the motor output even if the current is increased to produce a strong output.

Therefore, in terms of diversification of the product, forming the rotor frame performing the back yoke function with the iron plate has a certain limitation due to the thickness thereof.

And there existed a possibility of rust generate | occur | producing on the surface of a rotor frame by the characteristic of a steel plate material. Due to the occurrence of rust, the strength of the rotor frame is lowered, and even rust powder falling from the rotor frame may be attached to an air gap between the magnet and the stator to restrain the rotation of the rotor.

On the other hand, the rotor frame of the iron plate material after the formation of the rotor frame also had a difficult problem in machining or other processing for improvement of precision.

The present invention is to solve the above problems, by improving the drive structure of the drum washing machine, in particular the rotor to transmit the driving force of the motor directly to the drum to reduce noise, failure, energy waste elements, while improving durability and stability The purpose is to provide an improved washing machine.

In order to achieve the above object, the present invention, the wash water is stored in the tub; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; A rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit rotational force to the shaft. The frame includes a side wall portion and a rear wall portion, and provides a washing machine, which is formed of aluminum.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 7.

Figure 2 is a longitudinal cross-sectional view showing the drum washing machine configuration of the present invention, Figure 3 is a right side view of Figure 2 is a state diagram with the motor removed.

4 is a perspective view illustrating the rotor of FIG. 2.

5 is a perspective view illustrating the stator of FIG. 2, FIG. 6 is a perspective view illustrating the connector of FIG. 2, and FIG. 7 is a bottom perspective view of FIG. 6.

The present invention is installed inside the cabinet (not shown) tub (2) (tub) for storing the wash water, and the drum (3) rotatably provided inside the tub (2) to wash the laundry by rotation a rear end of the tub having a drum, a shaft 4 axially connected to the drum 3 to transmit the driving force of the motor 5 to the drum 3, and a winding wound with a coil. It comprises a stator 14 fixed to the wall surface.

In addition, the present invention is a rotor including a magnet (13a) and a back yoke 300 formed of a magnetic path and a rotor frame rotatably provided to the outside of the state and a central portion is connected to the shaft to transmit rotational force to the shaft. It further comprises (13).

Here, the present invention comprises a side wall portion and a rear wall portion, the material is characterized in that the rotor frame is formed of aluminum.

In addition, the present invention is provided on the front bearing (6a) and the rear bearing (6b) and the rear wall surface 200 of the tub (2) provided on the outer peripheral surface of both ends of the shaft (4) to support the front and rear bearings. Serration is coupled to the bearing housing 7 and the outer peripheral surface of the shaft 4, in particular on the outer peripheral surface of the rear side of the rear bearing 6b, and is coupled to the rotor 13 to the rotational force of the rotor ( It may be configured to be provided with a connector 16 (connector) for transmitting to 4).

Here, the bearing housing is provided between the rear wall surface of the tub and the stator to be fixedly coupled to the tub and the stator, so as to rotatably support the shaft by the front bearing 6a and the rear bearing 6b. do.

At this time, it is preferable that the bearing housing 7 is made of a metal material and made of aluminum alloy, and the connector 16 is preferably formed integrally by inserting the rotor frame and insert molding as an insulating material.

Meanwhile, a hub 700 having front and rear bearings located therein is integrally formed at a central portion of the metal bearing housing 7, and a stator 14 is formed outside the hub 700 using a fastening member 15d. ), The fastening boss 701 for fixing the bearing housing 7 is formed to be spaced apart at regular intervals along the circumferential direction, so that the trivet has a structure.

In addition, the front bearing 6a and the rear bearing 6b are supported on the inner circumferential surface of the hub 700 in the center of the bearing housing 7 of the metal material so that each bearing is supported without being separated from the bearing housing 7. Steps 8a and 8b are formed and configured, respectively.

In the above, the step 8a formed at the front of the step 8a, 8b formed on the inner circumferential surface of the bearing housing 7 is provided at the front end of the bearings respectively installed on the outer circumferential surfaces of both ends of the shaft 4. The stepped portion 8b, which is formed in a “a” shape so as to form a structure supporting the rear end portion of the bearing 6a, is formed at the rear of the stepped portions 8a and 8b formed on the inner circumferential surface of the bearing housing 7 It is formed in a "b" shape so as to form a structure for supporting the front end portion of the rear bearing 6b installed at the end.

On the other hand, the shaft 4 of the front bearing 6a and the rear bearing 6b is located on the outer circumferential surface of the shaft 4 which is located inside the bearing housing 7 and transmits the driving force of the motor 5 to the drum 3. Positioning step 9a, 9b for allowing the installation position on the image to be determined is configured to be formed at the front and the rear, respectively.

In the above, the front end of the shaft 4 is coupled to a spider 10 provided on the rear wall of the drum 3, and the front bearing 6a is exposed from the portion exposed behind the spider 10 of the shaft 4. In the area up to, the bushing 11 made of brass is press-fitted to prevent rust of the shaft 4, and the outer side of the bushing 11 is provided with a sealing member 12 for preventing moisture from entering the bearing side. do.

Meanwhile, a rotor 13 constituting the direct type motor 5 is fastened to the center of the rear end of the shaft 4, and fastened to the boss 701 for fastening the bearing housing 7 inside the rotor 13. And the stator 14 constituting the direct motor together with the rotor 13 is positioned. Of course, the fastening boss 701 may be provided in the stator.

At this time, the rotor 13 includes a rotor frame formed of aluminum material.

As shown in FIG. 4, the rotor frame is preferably integrally formed with the side wall portion and the rear wall portion, and the forming method is preferably formed by die casting an aluminum material.

On the side wall portion 13b extending forward from the edge of the rear wall portion 13a, a bent portion having a seating surface 130 for supporting the magnet 13c mounted in front of the inner surface thereof is formed along the circumferential direction. At the center of the rear wall portion 13a, a hub portion 132 having a through hole 131 through which a fastening member 15a for preventing the shaft 4 of the connector 16 coupled to the rotor 13 from being separated is formed. ) Is provided.

In addition, a plurality of cooling fins 133 acting to cool the heat generated by the stator 14 by blowing air toward the stator 14 when the rotor 13 rotates around the hub part 132 of the rotor frame. Fin is formed radially, wherein the individual cooling fins 133 are formed to have a predetermined length in the radial direction.

In addition, the cooling fin is formed integrally with the rotor frame, it is preferable to extend in the radial direction with a difference in height from the hub portion to the bent portion, the difference in height is formed to form a linear or curved to form the most cooling It is possible to intensively blow air into a portion corresponding to a specific portion of the stator that needs to be.

4 illustrates a cooling fin 133 having a large height at the hub side, but on the contrary, a height at the bent side may be formed.

In this case, a plurality of through holes 134 are formed in the region between the cooling fins 133 of the rotor rear wall portion 13a and the cooling fins adjacent thereto to serve as water discharge and vent holes.

On the other hand, the edge of the through hole 131 formed in the hub portion 132 of the rotor 13 has a connector 16 which is serrated on the outer circumferential surface of the rear end of the shaft 4 exposed to the rear bearing 6b. A fastening hole 137 for fastening to the rotor 13 and a positioning hole 138 for determining an assembly position of the connector 16 are formed at regular intervals.

In this case, the connector 16 is made of a resin material different from the rotor 13 which is made of aluminum and a vibration mode, and preferably may be integrally formed by inserting the rotor frame and insert molding as an insulating material.

On the other hand, the connector 16, as shown in Figs. 2, 6 and 7, in the fastening hole 137 formed in the hub portion 132 of the rotor 13 along the circumferential direction in the edge region thereof A corresponding fastening hole 162 is formed, and is inserted into the positioning hole 138 of the rotor 13 between the fastening holes 162 and the fastening hole 137 and the connector 16 of the rotor 13. Positioning projection 160 is formed integrally so that the fastening hole 162 of () is automatically matched.

In addition, a serration 164 is formed on the inner circumferential surface of the hub 163 of the connector 16 to match the serration 400 formed at the rear end of the shaft 4, and the hub 163 of the connector 16 is formed. The outer side is provided with a reinforcing rib 161 for reinforcing the strength of the hub 163.

On the other hand, the stator 14 constituting the motor 5 together with the rotor 13, as shown in Figs. 2 and 5, the ring-shaped insulator 140 and the winding provided on the outside of the insulator 140 And a coil 142 wound around the portion 141, and a fastening rib 143 for fixing the stator 14 to the bearing housing 7 is provided inside the insulator 140. It is formed integrally with.

On the other hand, the rotor comprises a stator core including a winding portion wound around the coil and an annular body portion formed with a magnetic path. Here, the insulator 140 performs a function of insulating between the stator core and the coil.

Here, the stator core may be an annular spiral core that forms a multilayer structure while spirally rotating the iron plate formed of the winding part 141 and the body part from the lowermost layer to the uppermost layer.

In addition, the stator core may be an annular split core in which stator core segments stacked in a multi-layer structure are bonded to each other. In other words, each of the segments may have an arc shape, and by combining them, it is possible to form one annular core.

On the outer circumferential surface of the tub 2, a tub bracket 17 for fixing the bearing housing 7 to the rear of the tub is coupled. In this case, the coupling method may vary according to the material of the tub, and if the material of the tub is stainless, it may be preferably welded and combined.

Here, the other end of the tub bracket 17 is formed to extend to the rear of the rear wall surface of the tub, the tub bracket 17 is fastening member (15d) fastened to the fastening groove 702 of the bearing housing (7) Is fastened to the fastening hole 170 is formed.

Here, the bearing housing 7 includes a plurality of extensions extending radially from the center, the extension portion and the tub bracket is coupled to the bearing housing is fixed to the tub. That is, if three extension parts are provided, it can be said that the tricycle type.

On the other hand, a self-aligning rib 703 having an inclined surface 703a formed at one side is provided along the circumferential direction on the outer side of the fastening boss 701 of the bearing housing 7. Magnetically inclined surface 144a is formed inside the frame 140 of the stator 14 fastened to the fastening boss 701 corresponding to the inclined surface 703a of the self-aligning rib 703 of the bearing housing 7. Alignment ribs 144 are provided.

The driving unit operation process of the drum washing machine of the present invention configured as described above is as follows.

When a current flows sequentially through the coil 142 of the stator 14 by the control of a motor driving controller (not shown) attached to the panel unit, and the rotation of the rotor 13 occurs, the connector 16 coupled to the rotor 16 ) And the serration coupled shaft (4) is rotated, so that power is transmitted to the drum through the shaft (4) to rotate the drum (3).

On the other hand, in the present invention, the stator 14 forms 36 poles, and the rotor preferably forms 48 poles. This is because the more poles, the easier the position sensing and the easier the control has advantages.

Here, the 48 poles of the rotor may be formed by coupling the N pole and the S pole with 12 permanent magnet segments having a total of four poles inside the rotor frame. And, the permanent magnet may be coupled through the adhesive.

Of course, the back yoke could also be coupled via an adhesive to the inside of the rotor frame.

Hereinafter, the driving unit assembly process and operation of the drum washing machine according to the present invention.

First, the bearing housing 7 of the present invention is coupled to the tub bracket 17 by a fastening member 15d fastened through the fastening hole 170 of the tub bracket 17 welded on the outer surface of the tub 2. As a result, the tub 2 is fixed to the rear side.

That is, since the tub bracket 17 is welded and fixed on the outer circumferential surface of the tub 2, the bearing housing 7 is fastened to the tub bracket 17 and mounted to the rear of the tub 2.

Since the bearing housing 7 of the present invention assembled as described above is made of a metal material such as aluminum alloy, thermal deformation does not occur even at a high temperature, and thus it can be applied to a drum washing machine having a drying stroke.

At this time, the bearing housing 7 according to the present invention, because the "b" shaped stepped portion 8a is formed in front of the inner circumferential surface, and the "b" shaped stepped 8b is formed in the rear of the inner circumferential surface, It is possible to support the rear end of the front bearing 6a and the front end of the rear bearing 6b which are respectively provided on the outer peripheral surfaces of both ends of the shaft 4.

That is, the bearing housing 7 made of metal is supported by both bearings 6a and 6b without being separated from the bearing housing 7 because the stepped portions 8a and 8b are formed on both sides of the inner circumferential surface thereof.

In addition, positioning steps 9a and 9b are respectively formed on the front and rear outer peripheral surfaces of the shaft 4, which are located inside the bearing housing 7 and transmit the driving force of the motor 5 to the drum 3. Thus, the assembling position on the shaft 4 of the front bearing 6a and the rear bearing 6b is easily determined.

On the other hand, the front end of the shaft 4 is coupled to the spider 10 provided on the rear wall surface of the drum 3, the front bearing (6a) from the portion exposed to the outside of the spider 10 of the shaft (4) Since the bushing 11 of the brass material is forcibly installed in the area up to the rust of the shaft 4 can be prevented.

In addition, since the sealing member 12 is installed on the outer surface of the bushing 11, water penetration into the bearing side is prevented.

On the other hand, the outer side of the hub 201 of the bearing housing has a fastening boss 202 is formed at regular intervals along the circumferential direction, the fastening member 15c penetrating the stator 14 to the fastening boss 202 By fastening, the stator 14 can be firmly fixed on the bearing housing 7.

At this time, a self-aligning rib 703 having an inclined surface 703a formed at one side is provided along the circumferential direction outside the fastening boss 701 of the bearing housing 7, and the bearing housing 7 is provided. Self-alignment in which the inclined surface 144a is formed inside the frame 140 of the stator 14 fastened to the fastening boss 701 to the inclined surface 703a of the self-aligning rib 703 of the bearing housing 7. The rib 144 is provided, and when the product is assembled, the stator (s) is formed by the self-aligning action between the self-aligning rib 703 of the bearing housing 7 and the self-aligning rib 144 of the stator 14. Since the 14 is positioned to be exactly concentric with the hub 700 of the bearing housing 7, the stator can be easily fastened to the bearing housing.

In addition, the rotor 13 constituting the direct type motor 5 is coupled to the center of the rear end of the shaft 4, and the stator 14 is positioned inside the rotor, and the rear wall surface of the rotor 13 ( 13a) On the side wall portion 13b extending forward from the edge, a bent portion having the magnet seating surface 130 is formed along the circumferential direction, and when the magnet 13c is attached to the inner surface of the rotor 13, the seating surface 130 Since the support of the magnet 13c is made, the rotor can be easily manufactured.

In addition, a through hole 131 is provided in the hub 132 located at the center of the rear wall surface 13a of the rotor 13 to prevent the shaft 4 from being separated from the connector 16 that is coupled to the rotor 13. Fastening member 15a such as a bolt for passing therethrough, and a plurality of cooling fins 133 is formed around the hub portion 132 of the rotor 13 to have a predetermined length in the radial direction while being radial Therefore, when the rotor 13 rotates, the cooling fins 133 blow air into the stator 14 to cool the heat generated by the stator 14.

At this time, the cooling fin 133 is formed to face the opening side of the rotor 13, the through hole 134 serves to serve as a vent.

Here, since the rotor frame is formed of a die-casting method of aluminum material, the manufacturing is simple, and rust is prevented and light, thereby minimizing the loss due to the inertia of the rotor frame and improving workability.

Meanwhile, at the edge of the through hole 131 formed in the hub part 132 of the rotor frame, a fastening hole 137 for fastening the connector and a positioning hole 138 for positioning the connector 16 are formed. Therefore, it is possible to easily assemble the connector 16 on the outer peripheral surface of the rear end of the shaft 4 exposed behind the rear bearing 6b to the rotor 13.

That is, the fastening holes 137 of the rotor 13 and the connector 16 are simply formed by fitting the positioning protrusions 160 of the connector 16 to be inserted into the positioning holes 138 of the rotor 13. ) 162 is automatically matched, and thus the fastening member 15b is fastened to the fastening holes 137 and 162 of the rotor 13 and the connector 16 so that the connector 16 and the rotor 13 Assembly can be done easily.

At this time, the connector 16 is injection-molded as a resin material, the vibration mode is different from the rotor 13 made of aluminum, so that the vibration of the rotor 13 is attenuated and transmitted to the shaft 4. It will also be possible to insert insert into the furnace.

Meanwhile, the serration 164 is formed on the inner circumferential surface of the hub 161 of the connector 16 so that the rotor 13 is connected to the serration 400 formed at the rear end of the shaft 4 through the connector 16. Rotational force is transmitted to the shaft 4 as it is.

In addition, a reinforcing rib 161 is formed outside the hub 201 of the connector 16 to reinforce the strength of the hub 201.

On the other hand, the present invention is not limited to the above-described embodiment, it is possible to change the dimensions, shape, material of course without departing from the scope of the technical idea of the present invention. Of course it could be applied.

The effects of the present invention configured as described above are as follows.

First, since the washing machine of the present invention has a motor direct structure, noise, failure, and power loss are reduced.

In addition, the washing machine of the present invention is applicable to a product having a drying function because there is no thermal deformation because the bearing housing is made of metal.

In the washing machine of the present invention, the rotor frame may be formed of aluminum to prevent rust, thereby increasing durability of the motor.

In addition, since the rotor frame of the present invention has a magnet seating surface, workability is improved when the magnet is mounted, and through-holes having a volleyball function and a ventilation hole function are provided, thereby preventing overheating of the motor and influence due to moisture, thereby preventing the motor. The reliability can be improved and the life can be extended.

On the other hand, since the rotor frame is formed of a die-casting method of aluminum material, the manufacturing is simple, and the workability for post-processing can be improved, and since it is formed of a light material, the loss of the motor due to the inertia of the rotor frame can be minimized.

And, since the rotor frame is formed of aluminum, it can provide elasticity to vary the thickness of the back yoke according to the diversification of the product, and increase the overall thickness to prevent the flutter caused by the rotation of the rotor frame. Noise and vibration can be reduced.

Claims (20)

Tub and wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; A rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit rotational force to the shaft, the washing machine comprising: The rotor frame includes a side wall portion and a rear wall portion, and is formed by die casting of aluminum, Washing machine is formed in the center of the rotor frame integrally formed by insert molding the connector of the insulating material for transmitting the rotational force of the rotor to the shaft. delete delete delete delete delete delete delete delete delete delete Tub and wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; Rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator, and a central portion thereof is connected to the shaft to transmit rotational force to the shaft, and formed by die casting of aluminum. In the washing machine made of The rotor frame, A bent portion formed along the circumferential direction to have a seating surface supporting a magnet mounted in front of its inner surface on the sidewall portion extending forward from the rear wall edge; A hub portion formed at the center of the rear wall portion; And It is formed integrally with the rotor frame, and is formed to extend radially with a difference in height from the hub portion to the bent portion to blow air into the stator during the rotation of the rotor to cool the heat generated in the stator Washing machine comprising a plurality of cooling fins. delete delete delete Tub and wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; A rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit rotational force to the shaft, the washing machine comprising: The rotor frame includes a side wall portion and a rear wall portion, and is formed by die casting of aluminum, The stator is, A stator core including a winding portion wound around a coil and an annular body portion formed with a magnetic path, Washing machine comprising an insulator for insulating the stator core and the coil. The method of claim 16, The stator core is, Washing machine characterized by an annular spiral core forming a multilayer structure while rotating the iron plate consisting of the winding portion and the body portion from the bottom layer to the top layer spirally. The method of claim 16, The stator core is, Washing machine characterized in that the stator core pieces laminated in a multi-layer structure is an annular split core bonded to each other. Tub and wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; A rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit rotational force to the shaft, the washing machine comprising: The rotor frame includes a side wall portion and a rear wall portion, and is formed by die casting of aluminum, The stator is 36 poles, the rotor is characterized in that the 48 poles. Tub and wash water is stored; A drum rotatably provided inside the tub to wash laundry by rotation; A shaft axially connected to the drum through the tub to transmit a driving force of the motor to the drum; A stator having a coil wound around the stator and fixedly coupled to the rear wall of the tub; A rotor comprising a magnet, a back yoke in which a magnetic path is formed, and a rotor frame rotatably provided to the outside of the stator and having a central portion connected to the shaft to transmit rotational force to the shaft, the washing machine comprising: The rotor frame includes a side wall portion and a rear wall portion, and is formed by die casting of aluminum, The back yoke is bonded with an adhesive in the circumferential direction of the side wall portion of the rotor frame, The magnet is a washing machine, characterized in that coupled to the adhesive in the inner circumferential direction of the back yoke.

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