KR20060044096A - Direct drive motor in washing machine - Google Patents

Abstract

The present invention improves the productivity of the motor manufacturing by improving the structure of the rotor and connector constituting the direct-type motor of the washing machine, while reducing the noise, failure, energy waste elements by allowing the driving force of the motor is transmitted directly to the drum. It would be.

To this end, the present invention is a motor for a washing machine having a stator having a coil wound around, and a rotor formed to surround the stator to directly drive a drum for washing through a washing shaft connected to the rotor; The steel plate is press-formed to integrally form the side wall and the rear wall, wherein a through hole is formed in the center of the rear wall and a plurality of fixing holes are formed around the through hole for fixing the connector, the washing shaft and the vibration mode. Is provided with a direct connection motor of a washing machine, characterized in that the resin material having a connector for supporting the laundry shaft having a coupling protrusion pressed into the fixing hole formed around the through hole.

Drum Washing Machine, Stator, Rotor, Direct Type, Press-In, Riveting, Bolt, Nut, Connector

Description

Direct drive motor in washing machine

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

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

Figure 2b is a detailed view of the portion A of Figure 2a, a longitudinal cross-sectional view of the drive unit structure of the drum washing machine according to an embodiment of the present invention

FIG. 2C is an enlarged view of portion B of FIG. 2B

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

4 is an enlarged perspective view of part C of FIG.

5 is a bottom perspective view of FIG.

6 is a perspective view showing the stator of FIG.

7 is a perspective view of the connector of FIG.

8 is a bottom perspective view of FIG.

Figure 9 is a longitudinal sectional view of the drive unit structure of the drum washing machine according to another embodiment of the present invention

10 is a longitudinal cross-sectional view of a driving unit structure of a drum washing machine according to another embodiment of the present invention.

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: laundry

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: seating surface

131: through hole 132: hub portion

133: cooling fin 134: through hole

135: embossing section 136: drainage hole

137a: Press-through hole 137b: Riveting hole

137c: bolt through hole 14: stator

140: frame 141: winding unit

142: coil 143: fastening rib

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

160: engaging projection 161: reinforcing rib                 

162b: Riveting hole 162c: Bolt through hole

163: Herb 164: Serration

The present invention relates to a washing machine, and more particularly, to a structural improvement of a direct type motor applied to a drum washing machine or the like.

In general, the pulsator type washing machine removes various contaminants attached to clothes, bedding, etc. by using the emulsification of the detergent, friction action of the water flow due to the rotation of the washing blade, and impact effect applied to the laundry by the pulsator. By detecting the amount and type of laundry by the sensor, the washing method is automatically set, and the washing water level is supplied to the appropriate level according to the quantity and type of the laundry, and then washing is performed under the control of the microcomputer.

In addition, the drum washing machine is a product that adopts a method of washing by using a rotating drum and the friction of the laundry by receiving the driving force of the motor in a state in which detergent, washing water, and laundry are put into the drum. , Laundry does not get tangled with each other, knocking and rubbing can have a washing effect.

Among these, the structure of a conventional drum washing machine will be briefly described as follows.

1 is a vertical cross-sectional view illustrating a conventional drum washing machine, in which 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 5a is installed at a lower side of the tub 2, and a motor pulley 18 is axially connected to the motor 5a.

Meanwhile, a drum shaft 4 is installed at the rear of the drum 3, and a drum pulley 19 is installed at the drum shaft.

In addition, the drum pulley 19 provided on the drum shaft 4 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.

In this regard, Korean Patent Laid-Open Publication No. 1999-0013456 introduces a system of a direct drum washing machine. However, when the stator is directly fastened to the rear wall of the tub, the concentricity of the stator is not maintained due to damage or deformation of the fastening part due to the vibration of the motor. There was a downside.

In addition, when manufacturing the bearing housing and the tub separately as another embodiment for solving the above problems, not only the assembly process is difficult, but also the entire bearing housing protrudes out of the tub has a disadvantage of occupying a lot of space. In addition, there is a problem that the bearing housing is not susceptible to vibration because only one side is supported by a screw. Moreover, there was a manufacturing disadvantage that required a complex waterproof structure for waterproofing not only the structure for waterproofing the bearing itself but also the tub and the bearing housing.

In addition, the inner housing and the outer collar, which are separate parts for supporting the bearing, must be separately provided inside the bearing housing. In the case of the rotor, the permanent magnet and the back yoke of the iron plate and the iron plate are separately configured, making the rotor extremely difficult.

On the other hand, in order to solve the above problem, the present applicant has proposed a drive unit structure in which the motor and bearing housing having the iron plate rotor, which does not have a back yoke, are not protruded out of the tub, which is disclosed in Korean Patent No. 424302. Is disclosed.

However, the motor disclosed in Korean Patent No. 424302 has a structure in which an axial protrusion is formed on the rear wall of the rotor, and a thread is provided on the inner circumferential surface thereof so that the connector is screwed to the thread of the protrusion to fix the connector to the rotor. There is a disadvantage in that the rotor manufacturing process is complicated, such as the process of the rotor to make a projection on the rear wall surface of the rotor, and again to process the thread on the inner peripheral surface of the projection and to remove the burrs.

The present invention is to solve the above problems, noise, failure, energy waste to improve the workability in the rotor manufacturing by simplifying the rotor manufacturing process through the improvement of the structure of the direct type motor applied to the drum washing machine, etc. It is an object of the present invention to provide a washing machine of a new structure that can reduce the elements and further improve the washing power.

In order to achieve the above object, the present invention has a stator having a coil wound around the winding, and a rotor formed to surround the stator to the washing machine motor to directly drive the drum for rotation through a washing shaft connected to the rotor In; The steel plate is press-formed to integrally form the side wall and the rear wall, wherein a through hole is formed in the center of the rear wall and a plurality of fixing holes are formed around the through hole for fixing the connector, the washing shaft and the vibration mode. Is provided with a direct connection motor of a washing machine, characterized in that the resin material having a connector for supporting the laundry shaft having a coupling protrusion pressed into the fixing hole formed around the through hole.

On the other hand, according to another aspect of the present invention for achieving the above object, having a stator having a coil wound winding, and a rotor formed to surround the stator to drive the drum for washing directly through the washing shaft connected to the rotor In the washing machine motor to be made; The steel plate is pressed to form the side wall and the rear wall integrally, and a through hole is formed in the center of the rear wall, and a plurality of riveting holes are formed around the through hole to fix the connector to the rear wall of the rotor by riveting. A rotor which is formed of a resin material having a vibration mode different from that of the washing shaft, and a hole corresponding to the riveting hole formed around the through-hole of the rotor and supporting the washing shaft; and a riveting hole of the connector and the rotor. A direct connection motor of a washing machine is provided, characterized in that it comprises a rivet that is riveted in the inserted state so that the connector is fixed to the rotor.

On the other hand, according to another aspect of the present invention for achieving the above object, having a stator having a coil wound winding, and a rotor formed to surround the stator to rotate the drum for washing directly through the washing shaft connected to the rotor In the washing machine motor to be driven; The steel plate is pressed to form the side wall and the rear wall integrally, but a through hole is formed in the center of the rear wall, and a plurality of bolts for fixing the connector to the rear wall of the rotor by bolt and nut fastening around the through hole. A rotor having a through hole formed therein, a bolt through hole corresponding to a bolt through hole formed around the through hole as a resin material having a vibration mode different from that of the washing shaft, and a connector supporting the washing shaft; and a bolt of the connector and the rotor. A direct type motor of a washing machine is provided, comprising a bolt inserted through a through hole and a nut fastened to a thread of the bolt.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 10.

First, a first embodiment of the present invention will be described with reference to FIGS. 2 to 8.

Figure 2a is a longitudinal cross-sectional view showing the configuration of the drum washing machine of the present invention, Figure 2b is a detailed view of the portion A of Figure 2a, a longitudinal cross-sectional view of the drive unit structure of the drum washing machine according to an embodiment of the present invention, Figure 2c It is an enlarged view of part B of 2b.

3 is a partially cutaway perspective view of the rotor of FIG. 2, FIG. 4 is an enlarged perspective view of part C of FIG. 3, and FIG. 5 is a bottom perspective view of FIG. 3.

6 is a perspective view of the stator of FIG. 2, FIG. 7 is a perspective view of the connector of FIG. 2, and FIG. 8 is a bottom perspective view of FIG. 7.

Referring to these drawings, the drum washing machine according to the first embodiment of the present invention, the rotor 13 constituting the direct-type motor (5) is fastened to the center of the rear end of the washing shaft (4), the rotor (13) Inside the stator 14 is fastened and fixed to the rear wall portion 200 of the tub (2) and together with the rotor 13 constitute a direct type motor.

At this time, the rotor 13 is made of a steel plate, as shown in Figures 3 to 5, on the side wall surface 13b extending forward from the edge of the rear wall surface (13a), the magnet is mounted in front of the inner surface A bent portion having a seating surface 130 for supporting 13c is formed along the circumferential direction, and a hub portion 132 that provides strength reinforcement of the rear wall surface and a connector engaging surface at the center of the rear wall surface 13a. ) Is formed.

In addition, a through hole 131 is formed at the center of the rear wall surface 13a of the rotor for assembling the connector and fastening the bolt to the washing shaft.

Here, the overall shape of the rotor 13 is preferably formed by press working.

In addition, a plurality of cooling fins are formed around the hub 132 of the rotor 13 to blow air into the stator 14 when the rotor 13 rotates to cool the heat generated by the stator 14. It is preferable that the fin 133 be formed radially, and the individual cooling fins 133 are preferably formed to have a predetermined length in the radial direction.                     

At this time, the cooling fin 133 is bent at an angle of 90 ° with respect to the rear wall by a lancing process to form a shape toward the opening of the rotor, the through-hole 134 formed by the lancing process Will act as a vent.

In addition, an embossing portion 135 for strengthening the strength of the rotor 13 is formed in the region between each cooling fin 133 of the rotor 13 rear wall surface 13a and the adjacent cooling fins, and the embossing A drainage hole 136 for discharging moisture may be formed on the part 135.

Meanwhile, a connector 16 formed of a resin material having a vibration mode different from that of the laundry shaft 4 is provided at a periphery of the through hole 131 formed in the hub part 132 of the rotor 13. The coupling protrusion 160 is forcibly pressed into the plurality of fixing holes 137a formed around the through hole 131 formed at the center of the rear wall surface of the rotor 13, and supports the washing shaft.

At this time, the fixing hole 137a and the coupling protrusion 160 have a circular or arc shape, and the cross-sectional area of the fixing hole 137a is smaller than the cross-sectional area of the coupling protrusion 160.

In addition, a serration 164 is formed on the inner circumferential surface of the hub 163 of the connector 16 to match the serration formed at the rear end of the washing shaft 4, and outside the hub 163 of the connector 16. Reinforcing ribs 161 are provided for strength reinforcement of the hub 163.

The connector 16 formed as described above is made of a resin material having a different vibration mode from the rotor 13, which is an iron plate, to suppress the vibration of the rotor from being transmitted to the washing shaft 4, and serves as a bushing for the rotor.

On the other hand, the drum washing machine according to the present invention, the tub (2) is installed inside the cabinet (1), the drum (3) is installed inside the tub (2), and the shaft is connected to the drum (3) motor ( Washing shaft 4 for transmitting the driving force of 5) to the drum (3), and bearings are provided on the outer peripheral surface of the both ends of the washing shaft (4).

At this time, the tub (2) is made of a plastic material, in the center of the rear wall portion 200 of the tub (2) to support the bearing (6a) (6b) respectively installed on the outer peripheral surface of both ends of the washing shaft (4) It is provided with a metal bearing housing (7).

In addition, the metal bearing housing 7 is inserted into the tub 2 made of plastic and inserted into the tub housing 2 so as to be integrated with the tub rear wall part 200.

In the above, the bearing housing 7 is preferably made of aluminum alloy.

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 at the front of the step 8a, 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 washing shaft 4. A stepped 8b is formed in the shape of "a" to form a structure for supporting the rear end of the front bearing 6a, which is formed at the rear of the stepped 8a, 8b formed on the inner circumferential surface of the bearing housing 7. Is formed in a "b" shape so as to form a structure for supporting the front end of the rear bearing 6b installed at the rear end.                     

Meanwhile, the washing shafts of the front bearing 6a and the rear bearing 6b are located on the outer circumferential surface of the washing 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 4) to be determined is comprised so that it may be formed in front and rear, respectively.

The front end of the washing shaft (4) is coupled to the spider (spider) provided in the rear wall of the drum (3), the front bearing (from the portion exposed to the rear of the spider 10 of the washing shaft (4) ( In the region up to 6a), a bushing 11 made of brass is press-fitted to prevent rust of the washing shaft 4, and an outer surface of the bushing 11 is a sealing member 12 for preventing water from penetrating into the bearing side. ) Is installed.

On the other hand, on the rear wall portion 200 of the tub (2) is provided with a hub 201 is inserted into the bearing housing 7 in the injection molding of the tub, the fastening member (15a) outside the hub 201 Fastening boss 202 for fixing the stator 14 on the rear wall portion 200 of the tub 2 by using a spaced apart at regular intervals along the circumferential direction.

In addition, between the rear wall portion 200 and the stator 14 of the tub 2 is substantially the same shape as the outer shape of the rear wall portion 200 of the tub and fixed to the rear wall portion 200 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 of the supporter 17 is in close contact with the inner surface of the rib 203 on one side of the tub rear wall part 200, and the rear end of the supporter 17 is provided with a hub part provided at the center of the rear wall part 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) that is not wrapped by the 132.

In addition, in order to fasten the supporter 17 and the tub rear wall part 200, a plurality of fastening members 15d are coupled inside the outer circumferential surface of the supporter 17, and the stator 14 is attached to the supporter 17. It has another fastening member 15a radially inward from the fastening member 15d for fixing.

Meanwhile, as shown in FIG. 6, the stator 14 constituting the motor 5 together with the rotor 13 includes a ring-shaped frame 140 and a winding part 141 provided outside the frame 140. It is configured to include a coil 142 wound on the inside, the fastening ribs 143 for fixing the stator 14 to the tub rear wall portion 200 inside the frame 140 is integral to the frame 140. Is formed.

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 washing shaft 4 coupled with the serration is rotated, so that power is transmitted to the drum through the washing shaft 4 so that the drum 3 rotates.

On the other hand, the drum washing machine action applied to the drive unit of the present invention is as follows.

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

In addition, the drum washing machine of the present invention can be applied to a drum washing machine having a drying stroke because there is no thermal deformation 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 portion 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 to the tub rear wall 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 washing 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 circumferential surfaces of the washing shaft 4 which are located inside the bearing housing 7 and transmit the driving force of the motor 5 to the drum 3. The assembly position of the front bearing 6a and the rear bearing 6b on the washing shaft 4 is easily determined.

On the other hand, the front end of the washing shaft 4 is coupled to the spider 10 provided on the rear wall portion of the drum 3, the front bearing (from the portion exposed to the outside of the spider 10 of the washing shaft 4) In the area up to 6a), the bushing 11 made of brass is press-fitted so that rusting of the washing 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 washing shaft 4, and the stator 14 is positioned inside the rotor, and the rear wall surface of the rotor 13 is located. (13a) A bent portion having a magnet seating surface 130 is formed along the circumferential direction on the sidewall surface 13b extending forward from the edge, so that the seating surface (when the magnet 13c is attached to the inner surface of the rotor 13) Since the support of the magnet 13c is made by 130, the manufacture of the rotor is easily performed.

In addition, a hub portion 132 having a through hole 131 is formed at the center of the rear wall surface 13a of the rotor 13 to fasten a bolt or the like for coupling the rotor 13 to the washing shaft 4. The member 15b can pass therethrough, and a plurality of cooling fins 133 are formed radially and have a predetermined length in a radial direction around the hub portion 132 of the rotor 13, thereby providing a rotor 13. During the rotation of the cooling fin 133 blows air toward 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 by the lancing process, the through-hole 134 formed by the lancing process serves as a vent.

Here, the rotor 13 is a steel sheet material, because it is molded by the press working, the time required for manufacturing the rotor is very short, the productivity at the time of rotor manufacturing is improved.

In addition, since the connector is coupled to the rotor by press-fitting, the assembly process of separately fastening the connector and the rotor is omitted, which also contributes to the productivity improvement during the manufacture of the rotor.

As the resin material, the connector 16 coupled to the rotor by press-fitting as described above is different from the iron plate rotor 13 in a vibration mode, thereby reducing the vibration of the rotor 13 transmitted to the washing shaft.

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

Meanwhile, an embossed portion 135 is formed in a region between the cooling fins 133 and the cooling fins of the rear wall surface 13a of the rotor 13 to improve the overall strength of the rotor 13, and the embossed portion 135. The drain hole 136 is formed on the), the water is discharged through the drain hole.

In addition, fastening bosses 202 are formed at regular intervals along the circumferential direction on the outer side of the hub 201 formed on the rear wall part 200 of the tub 2, and the stator is formed using the fastening bosses 202. 14 can be fixed on the tub 2 rear wall 200.

At this time, between the rear wall portion 200 and the stator 14 of the tub 2 is substantially the same shape as the outer shape of the rear wall portion 200, the rear wall portion 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 tub rear 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, Figure 9 is a drum washing machine drive unit structure according to another embodiment of the present invention, the present embodiment, the coil having a winding wound with a rotor, and a rotor formed to surround the stator to directly rotate the drum for washing In the washing machine motor to be driven, the washing shaft (4) for rotating the drum and the iron plate is pressed to integrally form the side wall surface (13b) and the rear wall surface (13a), the through-hole ( 131 is formed, and the rotor 13 and the washing shaft 4 and the vibration mode are formed around the through hole and a plurality of riveting holes 137b are formed to fix the connector to the rear wall of the rotor by riveting. As another resin material, a riveting hole 162b corresponding to the riveting hole 137b formed around the through-hole 131 of the rotor is formed and the connector 16 supporting the washing shaft, and the connector 16. And riveting holes (137) of the rotor (13) b) shows a case where the riveted in the inserted state through the (162b) is configured to include a rivet (R) to be fixed to the rotor.

Since the rest of the configuration and its operation are the same as in the above-described first embodiment, a detailed description thereof will be omitted.

On the other hand, Figure 10 is a longitudinal cross-sectional view of the drum washing machine driving unit according to another embodiment of the present invention, the present embodiment includes a stator having a coil wound around the winding, and a rotor formed to surround the stator to directly wash the drum for washing A motor for a washing machine driven to rotate; The washing shaft 4 for rotating the drum and the iron plate are pressed to form the side wall surface 13b and the rear wall surface 13a integrally, and a through hole 131 is formed at the center of the rear wall surface. The rotor 13 and the washing shaft 4 formed with a plurality of bolt through holes 137c for fixing the connector to the rear wall of the rotor by the bolt B and nut N fastening methods. The connector 16 which is formed of a resin material having a different vibration mode and corresponding to the bolt through hole 137c formed around the through hole 131 and supports the washing shaft, and the connector ( 16 and the bolt B inserted through the bolt through holes 137c and 162c of the rotor 13, and the nut (N) fastened to the thread of the bolt (B) is shown.

At this time, when the bolt (B) and the nut (N) is fastened, the washer (W) is preferably interposed.

In this case as well, the rest of the configuration and its operation are the same as in the above-described first embodiment, and thus detailed description thereof will be omitted.

On the other hand, the present invention is not limited to the above-described embodiments, of course, it is possible to change the dimensions, shapes, materials without departing from the scope of the technical idea of the present invention.                     

For example, in the above embodiments, the connector has a positioning protrusion, and the rear wall surface of the rotor may be provided with a positioning hole for joining the positioning protrusion. In addition, in the above embodiments, the connector is illustrated in the rear wall surface of the rotor, but the structure installed in the rear wall outer surface of the rotor is also within the scope of the present invention.

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

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

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

In the drum washing machine of the present invention, the rotor has a steel plate structure and can be manufactured by press molding, so that the moldability is excellent and the time required for manufacturing is very short, thereby improving productivity.

In addition, since the rotor of the present invention has a magnet seating surface, workability is improved when the magnet is mounted, and cooling fins and through holes are provided along with drainage holes, thereby preventing overheating of the motor, thereby improving reliability and extending the life of the motor. You can do it.

In addition, the drum washing machine of the present invention is provided with a connector having a different vibration mode from the rotor to reduce the vibration transmitted from the rotor to the washing shaft, and the supporter maintains the stator and maintains concentricity effectively.                     

In particular, since the drum washing machine of the present invention does not have to form an axial protrusion having a screw thread on the rear wall of the rotor, the rotor manufacturing process is simplified.

As described above, the present invention improves the driving unit structure of the drum washing machine, so that the driving force of the motor is transmitted directly to the drum to reduce the noise, failure and power loss to improve the washing force and product reliability, the driving unit The manufacturability of the constituent parts can be improved to improve productivity in production of the product.

Claims (10)

A motor for a washing machine having a stator having a coil wound around a coil and a rotor formed to surround the stator to directly drive a drum for washing through a washing shaft connected to the rotor; The steel plate is pressed to form the side wall surface 13b and the rear wall surface 13a integrally, but a through hole 131 is formed in the center of the rear wall surface, and a fixing hole 137a for fixing the connector is formed around the through hole. A plurality of rotors 13, It is provided with a connector 16 which supports the laundry shaft and has a coupling protrusion 160 press-fitted into the fixing hole 137a formed around the through hole 131 as a resin material having a vibration mode different from that of the laundry shaft 4. The direct type motor of the washing machine characterized in that the one. The method of claim 1, The fixing hole (137a) and the coupling protrusion 160, Direct-type motor of the washing machine, characterized in that it forms a circle or arc. The method of claim 2, The cross-sectional area of the fixing hole (137a) is a direct type motor of a washing machine, characterized in that smaller than the cross-sectional area of the coupling protrusion (160). The method of claim 1, The serration (164) of the washing machine, characterized in that the serration (164) is formed on the inner peripheral surface of the connector (16) to form a serration formed in the rear end of the washing shaft (4). The method of claim 4, wherein Direct connector motor of the washing machine, characterized in that the connector 16 is further provided with a reinforcing rib (161) for strength reinforcement. A motor for a washing machine having a stator having a coil wound around a coil and a rotor formed to surround the stator to directly drive a drum for washing through a washing shaft connected to the rotor; The steel plate is pressed to form the side wall surface 13b and the rear wall surface 13a integrally, but a through hole 131 is formed in the center of the rear wall surface, and the connector is fixed to the rear wall of the rotor by riveting around the through hole. A rotor 13 in which a plurality of riveting holes are formed, The connector 16 is formed of a resin material having a vibration mode different from that of the washing shaft 4 and corresponding to the riveting hole 137b formed around the through hole 131 of the rotor and supporting the washing shaft. )Wow, Direct connection of the washing machine, characterized in that it comprises a rivet (R) to be riveted in the state inserted through the connector 16 and the riveting holes (137b, 162b) of the rotor 13 to be fixed to the rotor. Type motor. A motor for a washing machine having a stator having a coil wound around a coil and a rotor formed to surround the stator to directly drive a drum for washing through a washing shaft connected to the rotor; The steel plate is pressed to form the side wall surface 13b and the rear wall surface 13a integrally, but a through hole 131 is formed in the center of the rear wall surface, and the bolt B and the nut (b) and the nut ( N) a rotor 13 in which a plurality of bolt through holes 137c are formed for fixing the connector to the rotor rear wall by a fastening method; The connector 16 is formed of a resin material having a vibration mode different from that of the washing shaft 4 and a bolt passing hole 162c corresponding to the bolt passing hole 137c formed around the through hole 131 and supporting the washing shaft. )Wow, A bolt B inserted through the bolt through holes 137c and 162c of the connector 16 and the rotor 13; Direct type motor of the washing machine, characterized in that it comprises a nut (N) fastened to the thread of the bolt (B). The method of claim 7, wherein When the bolt (B) and the nut (N) is fastened, the washer (W) is directly connected motor of the washing machine, characterized in that interposed. The method according to any one of claims 1, 6 and 7, Positioning projection is further provided in the connector 16, the rear wall surface of the rotor is a direct connection motor of the washing machine, characterized in that the positioning hole for joining the positioning projection is provided. The method according to any one of claims 1, 6 and 7, Wherein the connector is assembled in the outward direction from the inside of the rear wall surface of the rotor, or directly connected motor of the washing machine, characterized in that assembled in the inward direction from the outside of the rear wall surface of the rotor.

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