KR100617217B1 - structure of driving unit in drum-type washing machine - Google Patents

Abstract

The present invention is to improve the structure of the drive unit of the drum washing machine, so that the driving force of the motor is transmitted directly to the drum to reduce noise, failure, energy waste elements, and to improve the assembly and washing power.

To this end, the present invention is a tub (2) (tub) constituting the reservoir, the drum (drum) installed inside the tub (2), and the shaft (3) connected to the drum (3) of the motor (5) A shaft 4 for transmitting a driving force to the drum 3, a front bearing 6a and a rear bearing 6b provided on the outer circumferential surface of both ends of the shaft 4, and a rear wall surface 200 of the tub 2 A bearing housing 7 mounted to the bearing housing 7 for supporting the front and rear bearings, a rotor 13 coupled to the rear end of the shaft 4 and constituting the motor 5 together with the stator, and inside the rotor 13; And a stator 14 coupled to the tub rear wall 200 so as to form a motor together with the rotor, and a serration coupled to a rear outer surface of the rear bearing 6b of the shaft 4. ) Is coupled to the drive of the drum washing machine, characterized in that the connector 16 is provided to transmit the rotational force of the rotor to the shaft (4) It is provided.

Washing machine, drive unit, stator, rotor, direct type, tub bracket, bearing housing

Description

Structure of driving unit in drum-type washing machine}

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

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

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

Figure 3 is a partially cutaway perspective view of the rotor of Figure 2a

4 is an enlarged perspective view of part A 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.

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 surface 13c: magnet

130: seating surface 131: through hole

132: hub 133: cooling fin

134: Through 135: Embossing part

136: drainage hole 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 driving 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 be washed and pounded.

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 are many problems such as causing a decrease in washing power.

The present invention is to solve the above problems, by improving the drive unit structure of the drum washing machine to be directly transmitted to the driving force of the motor by reducing the noise, failure, energy waste elements, while improving the assembly and washing power It is an object of the present invention to provide a drum washing machine drive structure of a new structure that can be achieved.

In order to achieve the above object, the present invention, a tub, a drum installed inside the tub, a shaft axially connected to the drum installed inside the tub through the tub to transfer the driving force of the motor to the drum, and Front and rear bearings respectively installed on the outer circumferential surfaces of both ends of the shaft, a bearing housing mounted on the rear wall of the tub to support the front and rear bearings, and a rotor coupled to the rear end of the shaft and constituting a motor together with the stator. And a stator positioned inside the rotor and fastened to the rear wall of the tub to form a motor together with the rotor, and coupled to a serration on a rear outer peripheral surface of the rear bearing of the shaft, and coupled to the rotor to secure the rotational force of the rotor. Different from the rotor so that the vibration of the rotor is attenuated and transmitted to the shaft. The drive structure of the drum washing machine, characterized in that the connector is provided with is provided comprising a.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 6.

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

3 is a perspective view of the rotor of FIG. 2, FIG. 4 is a perspective view of portion A of FIG. 3, and FIG. 5 is a bottom perspective view of FIG. 3.

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

The present invention is installed in the cabinet (not shown) to form a tub 2 (tub), a drum (drum) installed inside the tub (2), and the drum (3) A shaft 4 which is axially connected and transmits a driving force of the motor 5 to the drum 3, a front bearing 6a and a rear bearing 6b provided on the outer circumferential surfaces of both ends of the shaft 4, and the tub ( A bearing housing 7 mounted on the rear wall 200 of 2) to support the front and rear bearings, and a rotor 13 coupled to the rear end of the shaft 4 and constituting the motor 5 together with the stator; And a stator 14 positioned inside the rotor 13 and fastened to the tub rear wall 200 to form a motor together with the rotor, and on a rear outer circumferential surface of the rear bearing 6b of the shaft 4. In addition to the coupling coupled to the rotor 13 is provided with a connector (16) (connector) for transmitting the rotational force of the rotor to the shaft (4) It is configured.

At this time, the bearing housing 7 is a metal material, it is preferable that the material is made of aluminum alloy.

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.

At this time, 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 respectively formed and formed.

In the above, the step 8a formed at the front of the step 8a, 8b formed on the inner peripheral surface of the bearing housing 7 is provided at the front end of the bearings respectively installed on the outer peripheral surface 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. Brass bushing 11 is press-fitted in the area up to the shaft 4 to prevent rust, and a sealing member 12 is installed on the outer surface of the bushing 11 to prevent moisture ingress into 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.

At this time, the rotor 13 is made of a steel plate, as shown in Figures 3 to 5, the magnet is mounted on the front side of the inner surface on the side wall surface (13b) extending forward from the edge of the rear wall surface (13a). A bent portion having a seating surface 130 for supporting 13c is formed along the circumferential direction, and a shaft 4 of the connector 16 which engages with the rotor 13 at the center of the rear wall surface 13a thereof. The hub portion 132 is formed with a through hole 131 through which the fastening member 15a for preventing separation is provided.

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. A fin 133 is formed radially, wherein the individual cooling fins 133 are 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 surface by the lancing (lancing) process to form a shape toward the opening side, the through hole 134 formed by the lancing processing serves as a vent hole Will be performed.

In addition, an embossing portion 135 for strengthening the strength of the rotor 13 is formed in an area between each cooling fin 133 of the rotor rear wall surface 13a and the adjacent cooling fins, and the embossing portion 135 The drain hole 136 is formed on the drain.

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.

At this time, the connector 16 is made of a resin material different from the rotor 13 which is a steel plate material and a vibration mode.

On the other hand, the connector 16, as shown in Figs. 2A, 7 and 8, 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 strength of the hub 163.

On the other hand, the stator 14 constituting the motor 5 together with the rotor 13, as shown in Figures 2a and 6, the ring-shaped frame 140, and the winding provided on the outside of the frame 140 And a coil 142 wound around the unit 141. A fastening rib 143 for fixing the stator 14 to the bearing housing 7 is formed inside the frame 140. It is formed integrally with.

In addition, a tub bracket 17 for welding the bearing housing 7 to the rear of the tub is welded on the outer circumferential surface of the tub 2, and a coupling groove of the bearing housing 7 is formed at a rear end of the tub bracket 17. A fastening hole 170 through which the fastening member 15d fastened to 702 is formed is formed.

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, the rotation of the rotor 13 occurs, and the connector 16 coupled to the rotor 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, the driving unit assembly process and action of the drum washing machine according to the present invention are as follows.

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. Thus, it is fixed behind the tub 2.

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 circumferential 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. The assembly 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 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.

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 being fastened, 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 so that the stator 14 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 when the product is assembled. ) Is positioned to be exactly concentric with the hub 700 of the bearing housing (7), it is possible to easily fasten the stator 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) 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 130 is attached when the magnet 13c is attached to the inner surface of the rotor 13. 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 by the lancing process, the through-hole 134 formed by the lancing process serves as a vent.

Here, since the rotor 13 is formed of a steel sheet and is formed by press working, the time required for manufacturing the rotor becomes very short, thereby improving productivity in manufacturing the rotor.

In addition, an embossed portion 135 is formed in a region between each of 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. The drain hole 136 is formed on the 135, and the water is discharged through the drain hole.

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 13 on the outer peripheral surface of the rear end of the shaft 4 exposed behind the rear bearing 6b.

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, and the vibration mode is different from that of the iron plate 13, so that 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 present invention is not limited to the above-described embodiment, it is a matter of course that changes in dimensions, shapes, materials can be made without departing from the scope of the technical idea 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.

On the other hand, even in the case of the stator, when assembling behind the bearing housing, the assembly can be easily performed by the self-aligning action of the rib.

As described above, the present invention improves the structure of the driving unit of the drum washing machine, so that the driving force of the motor is directly transmitted to the drum, thereby reducing noise and failure and reducing power loss, thereby improving the reliability of the product. It is possible to improve the productivity of production of the parts constituting the assembly of the product.

Claims (21)

Tub, A drum installed inside the tub, A shaft axially connected to a drum installed inside the tub through the tub to transmit a driving force of the motor to the drum; A front bearing and a rear bearing respectively installed on outer peripheral surfaces of both ends of the shaft; A bearing housing mounted on the rear wall of the tub to support the front and rear bearings; A rotor coupled to the rear end of the shaft and constituting a motor together with a stator; A stator positioned inside the rotor and fastened to the rear wall of the tub to form a motor together with the rotor; The connector is made of a material different from the rotor to be coupled to the serration on the rear bearing rear peripheral surface of the shaft and coupled to the rotor to transmit the rotational force of the rotor to the shaft and to damp the vibration of the rotor to be transmitted to the shaft. Drive unit structure of the drum washing machine, characterized in that provided. The method of claim 1, On the inner peripheral surface of the bearing housing central portion, A driving mechanism structure of a drum washing machine, characterized in that a stepped jaw supporting the rear end of the front bearing and the front end of the rear bearing is provided. The method of claim 1, The drive unit structure of the drum washing machine, characterized in that the bearing housing is made of metal. The method of claim 3, wherein The bearing housing is a drive structure of a drum washing machine, characterized in that the material is made of aluminum alloy. The method of claim 2, The stepped step formed at the front of the step formed on the inner peripheral surface of the bearing housing is formed in a "-" shape to form a structure for supporting the rear end of the front bearing installed in the front end of the bearings respectively installed on the outer peripheral surface of the both ends of the shaft , Drive step structure of the drum washing machine, characterized in that the step formed on the rear of the step formed on the inner surface of the bearing housing is formed in a "b" shape to form a structure for supporting the front end of the rear bearing installed in the rear end. The method of claim 1, 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, A driving step structure of 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 6, The front end of the shaft is coupled to the spider provided on the rear wall of the drum drum, characterized in that the bushing of the brass material is installed in the area from the portion exposed to the outside of the spider to the front bearing to prevent rust of the shaft Drive part structure of washing machine. The method of claim 1, 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 of the tub, the drive unit structure of the drum washing machine, characterized in that the stator constituting a direct type motor together with the rotor is located. The method of claim 8, Drive unit structure of the drum washing machine, characterized in that the rotor is made of iron plate material. The method of claim 8, The rotor 13, On the side wall surface 13b extending forward from the edge of the rear wall surface 13a of the rotor 13, a bent portion having a seating surface 130 for supporting the magnet 13c mounted in front of the inner surface thereof is circumferential. It is formed along the direction, the fastening member (15a) is fastened to the center of the rear wall surface (13a) is fastened to the shaft (4) to prevent the shaft 4 of the connector (16) coupled with the rotor 13 is passed Drive part structure of the drum washing machine, characterized in that the hub portion 132 is provided with a through hole (131). The method of claim 10, 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 drive unit structure of the drum washing machine, characterized in that it is formed to have a predetermined length in the radial direction. The method of claim 11, The cooling fin is formed so as to face the opening side of the rotor by the lancing process, the through hole formed by the lancing process is a drive structure of the drum washing machine, characterized in that to serve as a vent. The method of claim 12, Drive structure of the drum washing machine, characterized in that the cooling fin is bent at an angle of 90 ° to face the opening side of the rotor. The method of claim 11, In the region between the cooling fins and the cooling fins on the rear wall of the rotor, Embossing portion for strength reinforcement of the rotor is formed, The driving unit structure of the drum washing machine, characterized in that the drainage hole for water discharge is formed on the embossed portion. The method of claim 10, At the edge of the through hole formed in the hub portion of the rotor, A drum for fastening the connector coupled to the rotor on the outer circumferential surface of the rear end portion of the rear shaft exposed to the rear bearing and a positioning hole for determining an assembly position of the connector at a predetermined interval. Drive part structure of washing machine. The method of claim 15, The connector 16, A fastening hole 162 corresponding to the fastening hole 137 formed in the hub portion 132 of the rotor 13 is formed in the circumferential direction in the edge region thereof, The fastening hole 137 of the rotor 13 and the fastening hole 162 of the connector 16 automatically coincide with each other by being inserted into the positioning hole 138 of the rotor 13 between the fastening holes 162. The driving structure of the drum washing machine, characterized in that the positioning projection 160 is formed integrally. The method of claim 15, A serration is formed on the inner circumferential surface of the connector hub to match the serration formed at the rear end of the shaft. Drive hub structure of the drum washing machine, characterized in that the reinforcing ribs for reinforcing the strength of the hub on the outer side of the connector. The method according to any one of claims 14 to 17, The drive unit structure of the drum washing machine, characterized in that the connector is made of a resin material. The method of claim 1, In the center of the bearing housing mounted on the rear wall of the tub, a hub in which the bearing is formed is integrally formed, and a fastening boss for fixing the stator to the bearing housing using a fastening member is fixed along the circumferential direction on the outside of the hub Drive unit structure of the drum washing machine, characterized in that formed so as to be spaced apart. The method of claim 1, A tub bracket is provided on the tub outer circumferential surface, Drive unit structure of the drum washing machine, characterized in that the bearing housing is fixed to the tub by fastening the fastening member to the bearing housing through the fastening hole of the tub bracket. The method of claim 20, A self-aligning rib having an inclined surface formed outside the fastening boss of the bearing housing is provided along the circumferential direction, And a self-aligning rib having an inclined surface formed therein to correspond to an inclined surface of the self-aligning rib of the bearing housing.

Images