KR100662383B1 - Washing machine - Google Patents

Abstract

A washing machine is provided to restrict loss of noise and power by directly connecting a motor, to lengthen the life span of the motor by restricting rust and overheat of the motor with an aluminum rotor frame and a vent hole, and to operate stably by integrally forming a tub and a bearing. A washing machine includes a tub(2) storing water, a drum(3) rotated in the tub to wash the laundry, a shaft(4) axially connected to the drum through the tub so as to transmit driving force of a motor(5) into the drum, a stator(14) fixed to a rear wall of the tub and provided with a winding part(141) for winding a coil, a supporter(17) inserted between the rear wall of the tub and the stator to increase assembling strength of the tub and the stator, a gap adjustable washer(500) inserted between the supporter and the stator to adjust the gap between the tub and the stator, and a rotor(13) having a magnet(13c), a back yoke with a magnetic passage and a rotor frame rotated outside the stator and connected to the shaft so as to transmit rotational force into the shaft. The rotor frame is made of aluminum, and manufactured by die casting. A rear wall(13a) is integrally formed with a side wall(13b) of the rotor frame.

Description

Washing machine

1 is a longitudinal sectional view showing a conventional washing machine configuration

Figure 2 is a longitudinal cross-sectional view showing a washing machine configuration of the present invention.

3 is an enlarged detail view of a portion A of Figure 2, a longitudinal cross-sectional view of the drive unit structure of the washing machine according to the present invention;

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

1: cabinet 2: tub

200: rear wall 201: hub

202,204: Fastening boss 203: Rib

3: drum 4: shaft

400: serration 5: motor

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

8a, 8b: step 9a, 9b: stepping for positioning

10: Spider 11: Bushing

12: sealing member 13: rotor

13a: rear wall 13b: side wall

13c: magnet 130: bending portion

131: through hole 132: hub portion

133: cooling fin 134: through hole

137: fastening hole 138: positioning hole

14: Stator 140: Frame

141: winding unit 142: coil

143: fastening rib 15a, 15b, 15c, 15d: fastening member

16: Connector 160: Positioning protrusion

161: reinforcement rib 162: fastener

163: Herb 164: Serration

17: Supporter 18: Motor pulley

19: Drum pulley 20: Belt

21: door 22: gasket

23: hanging spring 24: friction damper

500: gap washer

The present invention relates to a washing machine, and more particularly, to an improvement in the drive structure of the 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 the structure of a conventional drum washing machine 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, there are disadvantages in that a failure point and a frequency of failure increase.

In short, the conventional drum washing machine indirectly transmits the driving force of the motor 5a to the drum 3 by using the motor pulley, the drum pulley and the belt. In addition, there were many problems such as lowering the washing power.

In addition, the conventional drum washing machine has a disadvantage in that the tub 2 is generally made of stainless steel, which is expensive in cost, poor in formability, and heavy in weight.

On the other hand, in order to solve this problem, the applicant of the Republic of Korea Patent NO. In 457429, a direct type motor was provided as a driving unit structure of a drum washing machine.

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. In this case, 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 iron 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 has a difficult problem in the machining or other processing after the rotor frame is formed to improve the accuracy, using a standardized rotor for the size of the tub and the output specifications of the motor required There was also a problem in reducing the cost of production.

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 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 coil wound around the stator and fixedly coupled to the rear wall of the tub; A supporter interposed between the rear wall surface of the tub and the stator to increase the bonding strength between the tub and the stator; 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.

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. The stator 14 is fixedly coupled to the wall surface, and the supporter is interposed between the rear wall surface of the tub and the stator to increase the bonding strength between the tub and the stator.

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, the back yoke 300 is characterized in that the iron plate is laminated to have a predetermined thickness.

At this time, the metal bearing housing 7 is configured to insert the injection molding of the tub (2) made of plastic material to be integral with the tub rear wall (200).

In the above, the bearing housing 7 is preferably made of aluminum alloy, and the connector 16 is preferably formed integrally by inserting the rotor frame and insert with an insulating material.

Meanwhile, the metallic bearing housing 7 supports the front bearing 6a and the rear bearing 6b respectively installed on the inner circumferential surface thereof so that each bearing is supported without being separated from the bearing housing 7. (8a) (8b) are formed and comprised, respectively.

At this time, the step 8a formed in front of the step 8a and 8b formed on the inner circumferential surface of the bearing housing 7 is installed 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 front 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 to form a structure for supporting the front end portion of the rear bearing (6b) is provided in the rear 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, the rotor 13 constituting the direct type motor 5 is fastened to the center of the rear end of the shaft 4, and the rotor 13 is fastened to the rear wall surface 200 of the tub 2 inside the rotor 13. The stator 14 constituting the direct motor together with the rotor 13 is positioned.

At this time, the rotor frame is formed of an aluminum material, as shown in Figures 3 to 5, the magnet 13c mounted on the front of the inner surface on the side wall portion 13b extending forward from the edge of the rear wall portion 13a. A bent portion 130 having a seating surface 130 for supporting () is formed along the circumferential direction, and at the center of the rear wall portion 13a for coupling the rotor 13 to the shaft 4. It is configured to form a hub portion 132 having a through hole 131 through which the fastening member 15a such as a bolt can pass.

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. 3 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.

In addition, between the rear wall 200 and the stator 14 of the tub 2 is substantially the same as the outer shape of the rear wall 200 of the tub and fixed to the rear wall 200 of the tub when the stator 14 is fastened. And the supporter 17 which supports the stator 14 and maintains the concentricity of the stator 14 is interposed.

At this time, the front end portion of the supporter 17 is in close contact with the inner surface of the rib 203 on one side of the tub rear wall surface 200, and the rear end portion of the supporter 17 has a hub portion provided at the center of the rear wall surface 200 of the tub ( It is configured to be in close contact with the outer circumferential surface of the rear end of the bearing housing 7 which is not covered by the 132 and exposed.

On the other hand, in the present invention, it is preferable that the gap between the supporter 17 and the stator 14 coupled to the supporter further comprises a gap adjusting washer 500 for adjusting the gap between the tub and the stator. . And, the shape of the gap washer is preferably made of an annular space to stably space the stator to the tub.

Then, a plurality of fastening holes may be formed in the circumferential direction of the gap washer.

That is, the gap washer 500 performs a function of coupling the stator a predetermined length away from the tub.

In general, the tub size and thus the motor capacity may vary according to the diversification of the washing machine capacity. In addition, the capacity of the motor is largely determined by the magnitude of the current applied to the motor. Therefore, the biggest factor for determining the capacity of the motor can be referred to as the stator.

Therefore, in terms of cost reduction for mass production, it is desirable to standardize the rotor, but for this purpose, the motor should be elastically coupled even when the size of the stator is changed.

To this end, when a small stator is used, the gap adjusting rib 500 is necessary because the rotor may come into contact with the rear wall of the tub when the stator and the rotor are coupled to each other.

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, a description will be given of the driving unit assembly process and operation of the washing machine according to the present invention.

First, since the tub 2 is made of a plastic material having excellent heat resistance, the washing machine of the present invention is light and injection-molded, so that the productivity is improved.

In addition, the washing machine of the present invention can be applied to a washing machine having a drying stroke because there is no thermal deformation even at a high temperature because the bearing housing 7 which is a bearing support means is made of metal such as aluminum alloy.

In the present invention, when the metal bearing housing 7 is injection molded into the tub 2 made of plastic, the bearing housing is insert-injected into the hub 201 of the rear wall surface 200 of the tub so that the tub 2 Because the unit is configured to be integrated with), the process of assembling the bearing housing 7 separately from the tub rear wall surface 200 is omitted, thereby simplifying the assembly process and reducing the number of assembly operations.

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

That is, the metal bearing housing 7 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 of the drum 3, the front bearing (6a) from the portion exposed to the spider 10 outside of the shaft (4) Since the bushing 11 of the brass material is forcibly press-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.

Meanwhile, 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 portion of the rotor 13 13a) A bent portion 130 having a magnet seating surface 130 is formed along the circumferential direction on the sidewall portion 13b extending forward from the edge, and when the magnet 13c is attached to the inner surface of the rotor 13, Since the support of the magnet 13c is made by the bent portion 130, the rotor is easily manufactured.

In addition, a hub portion 132 having a through hole 131 is formed at the center of the rear wall portion 13a of the rotor 13, and a fastening member such as a bolt for coupling the rotor 13 to the shaft 4. 15b can pass therethrough, and a plurality of cooling fins 133 are formed radially and have a predetermined length in the radial direction around the hub portion 132 of the rotor 13, so that the rotor 13 In the rotation, the cooling fin 133 blows air toward the stator 14 to cool the heat generated by the stator 14.

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.

In addition, a through hole 136 is formed in a region between each of the cooling fins 133 and the cooling fins of the rear wall portion 13a of the rotor 13 to perform a passage function through which water is discharged and wind passes.

Meanwhile, at the edge of the through hole 131 formed in the hub portion 132 of the rotor 13, a fastening hole 137 for fastening a connector and a positioning hole 138 for positioning an assembly of the connector 16 are provided. The connector 16 can be easily assembled to the rotor on the outer peripheral surface of the rear end of the shaft 4 exposed behind the rear bearing 6b to the rotor.

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 15c 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, and the vibration mode is different from the rotor 13 made of aluminum, and thus the vibration of the rotor 13 is attenuated and transmitted to the shaft 4.

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 outer side of the hub 201 formed on the rear wall 200 of the tub 2, the fastening boss 202 is formed at regular intervals along the circumferential direction, the stator using the fastening boss 202 14 can be fixed on the tub 2 rear wall surface 200.

At this time, between the rear wall surface 200 and the stator 14 of the tub 2 is substantially the same shape as the outer shape of the rear wall surface 200, the rear wall surface 200 of the tub (2) when the stator 14 is fastened Since the supporter 17 fixed to) is interposed, the support and concentricity of the stator 14 can be maintained.

That is, when the support 17 is fastened on the support fastening boss 204 on the tub rear wall 200 by the fastening member 15d, the front end of the supporter 17 is located on one side of the tub rear wall 200. It is in close contact with the inner surface of the rib 203, the rear end portion of the supporter 17 is exposed on the outer peripheral surface of the rear end portion of the bearing housing 7 exposed without being wrapped by the hub portion 132 provided in the center of the rear wall wall 200 In close contact with the stator 14 while supporting the stator 14, the concentricity of the stator is maintained.

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, as well as a drum type washing machine as well as a washing machine of the pulsator type 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.

In addition, the tub is formed of a plastic material to reduce the manufacturing cost and at the same time it is possible to integrally form the tub and the bearing housing by insert injection can provide a more stable drive structure.

Claims (23)

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 supporter interposed between the rear wall surface of the tub and the stator to increase the bonding strength between the tub and the stator; A gap washer interposed between the supporter and the stator to adjust a gap between the tub and the stator; 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, characterized in that formed of aluminum material. The method of claim 1, And the rotor frame is formed by die casting, and the side wall portion and the rear wall portion of the rotor frame are integrally formed. The method of claim 2, In the center of the rotor frame, Washer, characterized in that the connector is coupled to the serration on the outer peripheral surface of the shaft and transmits the rotational force of the rotor to the shaft. The method of claim 3, wherein The connector is formed of an insulating material, the washing machine, characterized in that formed integrally by insert molding the rotor frame. The method of claim 2, And a bearing housing disposed between the rear wall surface of the tub and the stator and fixedly coupled to the tub and the stator and having a bearing therein to rotatably support the shaft. The method of claim 5, The metal bearing housing is a washing machine, characterized in that the injection molding of the tub made of plastic, the insert injection molded to form an integral with the tub. The method of claim 6, The bearing housing is a washing machine, characterized in that the material is made of aluminum alloy The method of claim 6, Before and after the inner circumferential surface of the bearing housing, Washing machine characterized in that the stepped to support the front and rear bearings respectively located on the inner surface of the bearing housing so that each bearing is supported without being separated from the bearing housing. The method of claim 8, Among the steps formed on the inner circumferential surface of the bearing housing, a step formed at the front of the bearing housing is formed in a "-" shape to form a structure for supporting a rear end of the front bearing installed in the front end of the bearings respectively installed on the outer circumferential surfaces of both ends of the shaft. , Washing step characterized in that the step formed on the rear of the step formed on the inner circumferential surface of the bearing housing is formed in a "b" shape to form a structure for supporting the front end of the rear bearing is installed in the rear end. The method of claim 2, Located in the bearing housing in front and rear of the outer peripheral surface of the shaft for transmitting the driving force of the motor to the drum, Washing machine, characterized in that the positioning step is formed so that the installation position of the front bearing and the rear bearing on the shaft are respectively determined. The method of claim 2, The front end of the shaft is coupled to the spider provided in the rear wall of the drum, the bushing made of brass material is pressed in the area from the portion exposed to the outside of the spider to the front bearing to prevent rust of the shaft is installed Washing machine. The method of claim 2, The rotor constituting the direct type motor is fastened to the center of the rear end portion of the shaft, The inside of the rotor is fastened and fixed to the rear wall surface of the tub, characterized in that the stator constituting a direct type motor together with the rotor is located. The method of claim 12, The rotor is, On the side wall portion extending forward from the edge of the rear wall portion, a bent portion having a seating surface for supporting a magnet mounted in front of its inner surface is formed along the circumferential direction, And a hub having a through hole formed therein, through which a fastening member for coupling the rotor to the shaft is formed at the center of the rear wall. The method of claim 13, Around the hub of the rotor, When the rotor is rotated, a plurality of cooling fins are radially formed to blow air into the stator to cool the heat generated in the stator. The cooling fins are formed to have a predetermined length in the radial direction. The method of claim 14, Washing machine, characterized in that formed between the cooling fins and the cooling fins of the rear wall of the rotor frame and a plurality of through-holes to discharge moisture as well as to serve as a vent. The method of claim 14, The cooling fin is formed integrally with the rotor frame, Washing machine, characterized in that extending in the radial direction with the difference in height from the hub portion to the bent portion. The method of claim 2, 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 17, 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 17, 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. The method of claim 2, The stator is 36 poles, the rotor is characterized in that the 48 poles. The method of claim 2, 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. The method of claim 2, The supporter, Washing machine characterized in that it is almost the same shape as the outer shape of the rear wall of the tub and is fixed to the rear wall of the tub when the stator is fastened to support the stator and maintain the concentricity of the stator. The method of claim 22, The front end of the supporter is in close contact with the rib inner surface on one side of the rear wall of the tub, The rear end of the supporter is not wrapped by the hub provided in the center of the rear wall surface of the washing machine characterized in that it is configured to be in close contact with the outer peripheral surface of the rear end of the bearing housing exposed to the outside.

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