KR100777307B1 - Drum-type washing machine - Google Patents

Abstract

A drum type washing machine is provided to simplify assembly process and to guarantee bearing force for the stator located at a rear side wall of a tub. A drum type washing machine comprises a tub(2), a motor, and a bearing housing(7). The tub stores water and has a base unit. The motor has a rotor(5) and a stator(6) located at the base unit. The bearing housing is integrally formed with the tub and contains a bearing. The bearing supports a rotation shaft of the rotor. The bearing housing has a hub unit(7c) wherein a mount unit is formed. The stator is mounted at the mount unit. The mount unit is projected from an outer surface of the base unit of the tub and a body. The mount unit has a combining hole wherein the stator is combined. The remainder parts of the mount unit where the combining hole is not formed, are concaved to inwards of radius direction.

Description

Drum Washing Machine {Drum-type washing machine}

1 is a longitudinal sectional view schematically showing the structure of a conventional direct type washing machine;

2 is a perspective view showing a conventional stator structure

3 is a perspective view illustrating a split core of FIG. 2;

Figure 4 is a longitudinal sectional view schematically showing the structure of a direct drum washing machine according to the present invention

FIG. 5 is an enlarged view of a portion A of FIG. 4, and is a vertical cross-sectional view showing an embodiment of a structure of a driving unit of a drum washing machine according to the present invention.

6 is a perspective view showing a coupling structure of the driving unit of the drum washing machine shown in FIG.

FIG. 7 is an enlarged view of a portion A of FIG. 4, and is a vertical cross-sectional view showing another embodiment of a structure of a driving unit of a drum washing machine according to the present invention.

8 is a perspective view showing a coupling structure of the driving unit of the drum washing machine shown in FIG.

9 is an enlarged view of a portion A of FIG. 4, and is a longitudinal cross-sectional view showing still another embodiment of the structure of a driving unit of a drum washing machine according to the present invention;

10 is a perspective view of the stator of FIG. 5

11 is a perspective view of the spiral core of FIG.

12 is a top view of the stator main portion of FIG.

FIG. 13 is a perspective view of the stator main part of FIG. 10. FIG.

* Description of the symbols for the main parts of the drawings *

1: cabinet 2: tub

2a: base part 3: drum

4: shaft 5: rotor

6: Stator 7: Bearing Housing

7a: Unevenness 7b: Bearing housing body

7c: Bearing housing hub

The present invention relates to a drum washing machine, and more particularly to a drive unit of a direct type 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.

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

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

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

Referring to Figure 1 briefly look at the structure of the conventional direct-type 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 is installed at the rear side of the tub (2). The stator (6) is fixed to the rear wall of the tub, and the rotor (5) is axially connected to the drum (3) through the tub while surrounding the stator (6). It is installed as possible.

In addition, between the tub rear wall and the stator is substantially the same shape as the outer shape of the rear wall portion of the tub (2) is fixed to the tub rear wall when the stator is fastened to support the load of the stator and the concentricity of the stator The metal tub supporter which keeps) is interposed. Such a tub supporter is generally formed by pressing a steel sheet and covers most of the rear wall of the tub 2.

Meanwhile, 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 (Tub).

In addition, 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.

On the other hand, Figure 2 is a perspective view of the stator appearance of Figure 1, Figure 3 is a perspective view showing a split core (DC) to be applied to the stator of Figure 2, the conventional stator core manufacturing method by pressing a metal iron plate teeth (151) And the base 150 and at the same side of the tooth 151 on the opposite side of the manufacturing unit cores having a protrusion 500 for forming the fastening hole (500a), and then laminated them to make an assembly, again in the circumferential direction The interconnects complete the stator cores, called split cores.

At this time, the protrusion provides a fastening hole 500a necessary for fastening the stator 6 to the rear wall of the tub and serves to withstand the fastening force of the bolt.

However, the manufacturing method of the stator 6 by such a split core DC is not only complicated in process but also causes a lot of material loss. And the weight corresponding to the protrusion 500 is increased.

In order to fix the conventional stator 6 to the tub rear wall portion, a metal tub supporter was essentially provided between the stator and the tub rear wall portion. That is, in order to increase the bonding strength between the heavy stator and the rear wall portion of the tub, a tub supporter almost identical to the shape of the rear wall portion of the tub had to be provided.

In addition, there is a lot of difficulty in manufacturing the tub supporter to be almost homogeneous with the formation of the tub rear wall portion, there is a problem that takes a lot of manufacturing process to couple it to the tub rear wall portion. This is because such a tub supporter is formed of a steel plate and covers almost the most of the rear wall portion of the tub so that its weight is considerable. And because of this it was not easy to couple the tub supporter to the tub rear wall to maintain concentricity.

Therefore, in the conventional direct-type drum washing machine, a method for reducing the weight of the stator 6 and fixing the stator to the tub more easily and firmly is desired.

The present invention is to solve the above-mentioned problems, to reduce the material and weight required during manufacturing, the manufacturing process is simple, and a drum washing machine having an outer rotor type motor having a stator that can be stably mounted on the tub side The purpose is to provide.

Still another object of the present invention is to provide a drum washing machine which is easy and simplified in the assembling process and secures a bearing force on the stator on the rear wall side of the tub.

In addition, an object of the present invention is to provide a drum washing machine that can easily match the concentricity when the stator is coupled, and maintains the concentricity afterwards.

In order to solve the above technical problem, the present invention, the tub containing the wash water, the base portion; A motor having a rotor and a stator positioned in the base portion; And it provides a drum washing machine containing a bearing for supporting the rotating shaft of the rotor, the bearing housing to which the stator is directly connected.

Here, the bearing housing is preferably molded in the tub is formed integrally with the tub. And it is preferable that the hub portion protruding from the outer surface of the base portion is formed in the center of the base portion of the tub.

The hub part may include a bearing housing hub part in which a part of the bearing housing protrudes from an outer surface of the base part, and the hub part may be formed of only the bearing housing hub part.

The bearing housing preferably comprises a substantially cylindrical body and the bearing housing hub portion. In addition, the bearing housing hub is preferably formed with a seating portion on which the stator is seated.

The stator is formed in plurality in the circumferential direction, and includes a fastening part formed to protrude radially inward, and the fastening part of the stator is preferably seated on the seating part. And all or part of the fastening portion of the stator may be formed with a fastening hole for coupling the stator and the tub. In addition, a fastening hole corresponding to the fastening hole may be formed in the seating part.

The region where the fastening hole is not formed among the seating portions is preferably recessed inward in the radial direction.

The bearing housing hub portion may be larger or smaller than the bearing housing body.

The bearing housing hub portion preferably includes an insert portion formed to protrude outward from the seating portion to support the rotational repulsive force of the stator. Outer means here outer in the axial direction of the shaft.

The outer circumferential surface of the insert is preferably formed to correspond to the shape of the inner circumferential surface of the stator. That is, the protruding portion of the outer circumferential surface of the insertion portion corresponds to the recessed portion of the inner circumferential surface of the stator, and the recessed portion of the outer circumferential surface of the insertion portion corresponds to the protruding portion of the inner circumferential surface of the stator.

When the bearing housing hub portion has a smaller radius than the main body, a seating portion on which the stator is mounted may be formed in the bearing housing main body in the radially outer side of the hub portion.

Here, the outer peripheral surface of the bearing housing hub portion is preferably formed to correspond to the shape of the inner peripheral surface of the stator. In addition, a fastening hole for coupling the stator is formed in the seating portion, and an area in which the fastening hole is not formed among the seating portions is recessed inward in the radial direction.

In addition, irregularities may be formed along the circumferential direction on the outer circumferential surface of the bearing housing main body, and irregularities may be formed along the longitudinal direction.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a longitudinal sectional view schematically showing the configuration of a direct drum washing machine according to the present invention, Figure 5 is an enlarged view of a portion A of Figure 4, a longitudinal sectional view showing the structure of the drive unit of the drum washing machine according to the present invention.

The present invention provides a motor having a stator (6) and a rotor (5), a tub (2) installed inside the cabinet (1), receiving wash water, and having a base portion to which the stator is coupled, and a rotating shaft of the rotor. It comprises a bearing housing (7) for receiving the bearing to support.

In addition, the present invention includes a shaft (4) provided in the tub to accommodate the clothes, and selectively connected to the rotatable drum (3) and the rotor (5) for transmitting the driving force of the motor to the drum (3) It is done by

Here, the tub (5) is preferably made of a plastic material, the rear wall portion of the tub 2, that is, the metal for supporting the bearings respectively installed on the outer peripheral surface of both ends of the shaft (4) at the center of the base portion of the tub (2) Preferably, the bearing housing 7 is made of material.

At this time, the bearing housing 7 is made of an aluminum alloy or the like, and when injection molding the tub 2 made of plastic, the insert molding is configured to be integral with the tub base portion 2a. Of course, the bearing housing 7 may be coupled to the tub base by using a bolt or the like.

Meanwhile, referring to FIG. 5, the bearing housing 7 includes a bearing housing body formed in a shape of a sleeve that supports the bearing, that is, a cylinder. The bearing housing 7 is provided with bearings 600a and 600b for supporting the shaft 4 to be rotatable.

The bearing housing 7 is insert molded into the tub so as to penetrate through the center of the base portion 2a of the tub and is integrally formed with the tub.

Here, it is preferable that the unevenness 7a is formed on the outer circumferential surface of the bearing housing 7. That is, the coupling strength of the bearing housing and the tub base portion can be increased through the unevenness. The unevenness 7a may be formed along the circumferential direction of the outer circumferential surface of the bearing housing or may be formed along the longitudinal direction of the outer circumferential surface of the bearing housing. Of course, the unevenness 7a may be simultaneously formed along the circumferential direction and the longitudinal direction of the outer circumferential surface of the bearing housing.

The unevenness formed along the longitudinal direction increases the bonding strength in the longitudinal direction between the bearing housing and the tub base portion, and the unevenness formed along the circumferential direction is the bonding strength in the circumferential direction between the bearing housing and the tub base portion Will increase.

Then, a shaft 4 is provided through the center of the bearing housing 7, one end of the shaft is connected to the drum 3, and the other end is connected to the rotor 5.

Here, the front end of the shaft 4 is connected to the drum through a spider 10 to transfer the rotational force to the drum 4 more reliably, and behind the spider 10 of the shaft 4. In the area from the exposed portion to the front bearing 600a, a bushing 11 made of brass is press-fitted to prevent rust of the shaft 4, and the outer surface of the bushing 11 is provided with water penetration into the bearing side. Seal ring member 12 for preventing is installed.

Meanwhile, a rotor 5 constituting a direct type motor is fastened to a center of the rear end of the shaft 4, and the rotor 5 is fastened and fixed to a rear wall of the tub 2 inside the rotor 5. In addition, the stator 6 constituting the direct type motor is positioned.

The rotor 5 is made of a steel plate, and as shown in FIG. 5, on the sidewall surface 13b extending forward from the edge of the rear wall surface 13a, the rotor M may support the magnet M mounted in front of the inner surface thereof. A bent portion having a seating surface 130 to be formed is formed along the circumferential direction, and a fastening member 15a such as a bolt for coupling the rotor 5 to the shaft 4 at the center of the rear wall surface 13a. The hub portion 132 is formed so that the through hole 131 is formed therethrough.

Here, the overall shape of the rotor 5 is preferably formed by press working.

And, around the hub portion 132 of the rotor (5) a plurality of cooling fins that acts to cool the heat generated in the stator 6 by blowing air to the stator 6 when the rotor (5) rotates ( 133 is formed to form a radial (amplifier), wherein the individual cooling fins 133 are formed to have a predetermined length in the radial direction.

The cooling fin 133 is bent at an angle of 90 ° with respect to the rear wall by a lancing process to form an opening toward the opening of the rotor 5, and 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 5 is formed in the region between each cooling fin 133 of the rotor 5 rear wall surface 13a and the adjacent cooling fins, and the embossing On the part 135, a drain hole 136 for discharging moisture is formed.

Meanwhile, a connector 16 coupled to the edge of the through hole 131 formed in the hub portion 132 of the rotor 5 on the outer circumferential surface of the rear end portion of the shaft 4 exposed to the rear of the rear bearing 600b is connected to the connector 16. ) Is provided.

The connector 16 is made of a resin material having a different vibration mode from the rotor 5, which is a steel plate, and serves as a bushing for the rotor. In addition, the insulating function is performed between the stator 6 or the rotor 5 and the shaft 4.

In addition, a serration 164 is formed on the inner circumferential surface of the connector 16 to match the serration 400 formed at the rear end of the shaft 4.

On the other hand, on the base portion of the tub (2) is formed a hub portion in which the bearing housing 7 is insert molded therein during injection molding of the tub.

Here, the hub portion 7c is preferably formed to protrude a predetermined height than other portions of the base portion 2a of the tub 2. This is because, in order to rotatably support the shaft 4 with respect to the tub 2, it is necessary to secure the length to which the shaft is supported to some extent. In addition, there is a limit to increasing the thickness of the rear wall portion of the tub in order to secure this length. Therefore, it is desirable to increase the thickness only in the portion through which the shaft passes.

Of course, the hub portion 7c may be made of only a bearing housing hub portion protruding from the outer surface of the base portion 2a of the tub.

According to the invention the stator 6 is directly connected to the bearing housing 7. Hereinafter, embodiments of a driving structure of a drum washing machine according to the present invention, in particular, a coupling structure of a stator and a bearing housing will be described in detail with reference to FIGS. 5 to 9.

5 to 6, an embodiment of the coupling structure of the stator in the present invention will be described in detail.

In this embodiment, the bearing housing 7 comprises a substantially sleeve-shaped body, that is, a cylinder-shaped body 7b, and a bearing housing hub portion 7c formed at one side of the body and to which a stator is coupled. Here, the stator 6 is directly connected to the bearing housing hub portion.

The bearing housing hub portion is exposed to the outer surface of the base portion 2a of the tub when the bearing housing 7 is insert molded into the tub 2 and integrally formed. As illustrated, the bearing housing hub portion 7c may be formed larger than the radius of the bearing housing body 7b.

The bearing housing hub portion 7c is provided with a seating portion 7d on which the stator 7 is seated. That is, provided in a planar shape, the stator 7 is seated on the seating portion 7d at a position perpendicular to the shaft 4.

Meanwhile, the stator 6 applied to the present invention will be described later, but the stator 6 includes a plurality of fastening portions 143 formed along the circumferential direction and protruding radially inward. In addition, a fastening hole 143b is formed in all or part of the fastening part, and the stator and the bearing housing, in particular, the bearing housing hub part 7c are coupled to each other through the fastening hole.

In addition, it is preferable that the stator, in particular, the fastening part 143 of the stator is seated on the seating part. In addition, the seating part may be provided with a fastening hole 7e corresponding to the fastening hole 143b formed in the fastening part of the stator.

In addition, it is preferable that a positioning groove 7f is formed in the seating portion 7d to determine a radial position of the stator. The positioning projection (see Fig. 13, 143b) of the stator is fitted into the positioning groove. Therefore, when the stator is coupled to the bearing housing through the positioning groove 7f and the positioning protrusion 143b, the radial position of the stator, that is, concentricity, is matched. In addition, it is possible to minimize the deviation of the concentricity at the time of driving the motor.

When the concentricity is matched, the fastening portion 143 of the stator is seated on the seating portion 7d, and the bolt b is fitted into the fastening hole 143b and the fastening hole 7e to stir the stator 6. Is directly connected to the bearing housing 7.

Meanwhile, as shown in FIG. 6, an area in which the fastening hole 7e or the positioning groove 7f is not formed among the seating parts 7d is recessed inward in the radial direction. That is, the depression 7g is preferably formed. This is to save weight and to save the material forming the bearing housing 7.

Hereinafter, with reference to Figures 7 to 8 another embodiment of the coupling structure of the stator in the present invention will be described in detail. This embodiment differs from the above-described embodiment in that the shape of the bearing housing hub portion 7c itself is formed so as to determine the radial position of the stator 6.

That is, in the present embodiment, the bearing housing hub portion 7c is a coupling portion 7i which forms the lower portion of the bearing housing hub portion 7c in the insertion portion 7h which forms the upper portion of the bearing housing hub portion 7c. It is made, including. Here, the bearing housing hub portion 7c is preferably larger in radius than the bearing housing body.

 A mounting portion 7d on which the stator is seated is formed on the upper surface of the coupling portion 7i. Preferably, the coupling portion 143 of the stator is seated on the mounting portion. A fastening hole 7e is formed in the seating part to correspond to the fastening hole 143a formed in the coupling part 143 of the stator.

On the other hand, the outer peripheral surface shape of the insertion portion 7h corresponds to the inner peripheral surface shape of the stator. That is, if the outer circumferential surface shape of the insert portion is formed by the unevenness along the circumferential direction, the inner circumferential surface shape of the stator 6 may also be formed by the unevenness along the circumferential direction. That is, the inner circumferential surface of the stator is inserted and coupled to the outer circumferential surface of the insertion portion.

Here, the outer circumferential surface shape of the insertion portion 7h and the inner circumferential surface shape of the stator are joined to each other to determine the radial position of the stator. Therefore, the concentricity can be minimized when the stator is coupled to the bearing housing 7 or even when the motor is driven.

In addition, the insertion part 7h may support the load by distributing the stator, and may support the rotational repulsive force of the stator according to the rotation of the rotor 5. Thus, the stator can be more firmly and stably coupled to the bearing housing. Of course, the stator is located in the base portion 2a of the tub.

Hereinafter, another embodiment of the coupling structure of the stator in the present invention will be described in detail with reference to FIG. 9. This embodiment is mostly the same as the other embodiments described above, but the radius of the main body 7b of the bearing housing is formed larger than the radius of the hub portion 7c. The stator 6 is directly connected to the main body of the bearing housing.

In the present embodiment, the stator is inserted into the bearing housing hub portion 7c, and the stator is inserted into the bearing housing through a fastening hole formed in the engaging portion of the stator and a fastening hole 7e formed in the bearing housing body 7b. Is coupled to.

In this embodiment as well, the outer circumferential surface shape of the bearing housing hub portion and the inner circumferential surface shape of the stator are matched with each other to support the load and rotational repulsion force of the stator and maintain concentricity.

Meanwhile, the bearing housing body 7b may be substantially cylindrical in shape, and may be formed by recessing in a radial direction other than a portion where the fastening hole is formed. This is to reduce the weight of the bearing housing and at the same time save material. In addition, as the outer circumferential surface shape of the bearing housing body becomes more complicated, the coupling strength between the tub and the bearing housing will increase when the bearing housing is insert molded into the tub.

In the above-described embodiments, the hub portion protruding a predetermined length from the outer surface is formed in the base portion 2a of the tub where the stator is coupled and positioned, and the hub portion is formed by a portion of the tub 2 and the bearing housing hub portion 7c. Can be done. In this case, the bearing housing hub portion passes through a portion of the tub. In either case, however, the hub portion may consist of only the bearing housing hub portion.

On the other hand, as shown in FIGS. 10 and 11, the stator 6 constituting the motor together with the rotor 5 includes a spiral core SC, an insulator 144 surrounding the spiral core SC, and The coil 142 is wound around the tooth 151 of the spiral core (SC), and formed integrally with the insulator 144, and comprises a fastening portion 143 protruding three or more inside the core, the drum The weight of the washing machine will be more than 1.5kg. However, the stator 6 in the present invention is applied to the spiral core (SC), and coupled to the tub base portion (2a) through the insulator can reduce the overall weight of the stator compared to the same motor performance.

In addition, the spiral core (SC) is a multi-layer structure as the winding (winding) while rotating the iron plate consisting of a tooth and the base portion from the bottom layer to the top layer spirally, the base portion of the spiral core (SC) The teeth 151 protrude radially outward from the radial direction, and the base portion 150 of the spiral core SC is formed with a concave groove 152 to reduce the stress when the core is wound.

In addition, the spiral core (SC) is coupled by riveting by a rivet 153 penetrating the through-hole formed in the base portion 150.

 In addition, the winding start portion and the winding end portion of the spiral core SC may be welded to and bonded to a predetermined portion of the base portion 150 in contact with each other.

On the other hand, the recess groove 152 formed in the base portion 150 of the spiral core (SC) may be formed to form a square or trapezoidal, it may be formed to form an arc.

12 and 13, in the stator 6 having a structure in which at least three fastening portions 143 protrude radially inward from the core inner circumferential surface integrally with the insulator, from the outer surface of the spiral core SC. When the length of each protruding tooth 151 is referred to as "a", and the distance from the inner surface of the spiral core SC to the center of the fastening hole 143a formed in the fastening portion 143 is referred to as "b". The fastening part 143 is formed so that it may be defined as a≥b.

At this time, the fastening portion 143 is formed so that the height is 20% or more of the total core stack height, more preferably the height of the fastening portion 143 is formed to be the total core stack height.

In addition, at least one cavity 143c is provided on the fastening part 143 to cushion vibrations when the motor is driven. The fastening part 143 is exposed to the rear wall of the tub 2 in an insert molding state. Positioning projections 143b to be fitted to the positioning grooves 314 of the stator fastening portion 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 6 under the control of a motor driving controller (not shown) attached to the panel unit, the rotation of the rotor 5 occurs, which is coupled to the rotor 5. The shaft 16 coupled with the connector 16 and the serration are rotated, and thus power is transmitted to the drum 3 through the shaft 4 so that the drum 3 rotates.

On the other hand, the drum washing machine action applied drive structure 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 of the plastic tub 2, the bearing housing is insert-molded into the hub portion of the base of the tub 2 so that the tub 2 and Due to the integral structure, the process of assembling the bearing housing 7 separately from the rear wall portion of the tub 2 is omitted, thereby simplifying the assembly process and reducing the assembly labor.

In the stator 6 constituting the motor together with the rotor 5, as shown in FIG. 11, the recessed groove 152 of the core is formed in the base 150 of the spiral core SC, and the core is wound. By reducing the stress during the winding, the winding operation can be easily done with less force.

In particular, in the stator 6 having a fastening portion 143 protruding three or more radially from the core inner circumferential surface integrally with the insulator as shown in FIG. 12, the stator 6 projects from the outer surface of the spiral core SC. When the length of each tooth 151 is called "a" and the distance from the inner surface of the spiral core SC to the center of the fastening hole 143a formed in the fastening part 143 is "b", a It is formed to be ≥ b.

This is advantageous in that the torque acting is smaller as the position of the fastening hole 143a is closer to the point where the load is applied, but if it is too close, the diameter of the bolt inevitably becomes smaller to support the entire stator 6. Too many bolts must be tightened in order to determine this.

In addition, referring to FIG. 13, the fastening part 143 is formed such that its height is 20% or more of the total core stacking height, which means that when the height of the fastening part 143 becomes 20% or less of the total core stacking height. This is because the fastening part 143 may be damaged by vibration generated when the motor is driven.

In particular, the height of the fastening part 143 is preferably formed to be the entire core stack height, but may be a height higher than that.

However, since the fastening part 143 becomes too large, the overall width of the washing machine driving part is increased, resulting in a reduction in the washing capacity of the washing machine. Therefore, the height of the fastening part 143 is not more than twice the height of the entire core stack. Do not

In addition, the cavity 143c formed on the fastening part 143 performs a buffering and attenuation effect on vibration generated when the motor is driven to improve the mechanical reliability of the stator 6.

In addition, the positioning protrusions 143b formed on the fastening part 143 are joined to the positioning grooves 314 of the tub 2 to facilitate the fastening of the stator 6.

In particular, in the present invention, it is possible to omit the existing tub supporter, which serves to support the stator 6 while protecting the rear wall portion of the tub 2.

On the other hand, the front end portion of the shaft 4 is coupled to the spider 10 provided on the rear wall of the drum 3, and from the portion exposed to the outside of the spider 10 of the shaft 4 to the front bearing 600a Since the bushing 11 of the brass material is forcedly installed in the region, it is possible to prevent the rusting of the shaft 4.

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 5 constituting the direct type motor is coupled to the center of the rear end of the shaft 4, and the stator 6 is positioned inside the rotor 5, and the rear wall surface of the rotor 5 ( 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 mounting surface 130 when the magnet M is attached to the inner surface of the rotor 5. By the support of the magnet (M) is made, it is easy to manufacture the rotor.

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 5, and a fastening member such as a bolt for coupling the rotor 5 to the shaft 4. 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 5, so that the rotor 5 In the rotation, the cooling fin 133 blows air toward the stator 6 to cool the heat generated by the stator 6.

At this time, the cooling fin 133 is formed to face the opening side of the rotor 5 by the lancing process, the through-hole 134 formed by the lancing process serves as a vent.

Here, since the rotor 5 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 an area between the cooling fins 133 and the cooling fins of the rear wall surface 13a of the rotor 5 to improve the overall strength of the rotor 5 and to increase the embossed portion ( The drain hole 136 is formed on the 135, and the water is discharged through the drain hole.

The connector 16 is injection molded as a resin material, and the vibration mode of the connector 16 is different from that of the iron plate 5, so that the vibration of the rotor 5 is attenuated and transmitted to the shaft 4.

In addition, a serration 164 is formed on the inner circumferential surface of the hub of the connector 16 so that the rotor 5 of the rotor 5 is connected to the serration 400 formed at the rear end of the shaft 4. Rotational force is transmitted to the shaft 4 as it is.

On the other hand, the present invention is not limited to the above-described embodiments, of course, it is possible to change the dimensions, shape, material 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, the drum washing machine of the present invention is directly connected to the motor structure, noise, failure, power loss is reduced, and since the bearing housing is made of metal, it can be applied to a product having a drying function without thermal deformation.

In addition, in the drum washing machine of the present invention, by adopting a spiral core (SC) having an easy winding structure, waste of the base material is prevented and manufacturing is easy, and a lighter stator can be manufactured with the same performance. Therefore, it is possible to easily fix the stator to the tub by omitting the conventional tub supporter for reinforcing the rear wall portion of the tub.

In addition, 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 to reduce the noise and failure and to reduce the power loss to improve the washing power to improve the reliability of the product It is possible to improve the manufacturability of the parts constituting the drive unit to improve the productivity in production.

According to the present invention, the concentricity can be easily matched when the stator is coupled, and concentricity can be maintained after the fact.

Claims (20)

A tub containing wash water and having a base portion; A motor having a rotor and a stator positioned in the base portion; And It is formed integrally with the tub, bearing housing for receiving a bearing for supporting the rotation axis of the rotor; The bearing housing includes a hub portion having a seating portion protruding from an outer surface of the main body and the base portion of the tub to seat the stator. The mounting portion is formed with a fastening hole to which the stator is coupled, the drum washing machine, characterized in that the portion in which the fastening hole is not formed is recessed radially inward. A tub containing wash water and having a base portion; A motor having a rotor and a stator positioned in the base portion; And It is formed integrally with the tub, bearing housing for receiving a bearing for supporting the rotation axis of the rotor; The bearing housing includes a hub portion protruding from the outer surface of the base portion of the tub and the tub, to which the stator is directly connected. And the hub part comprises a seating part on which the stator is seated and an insertion part protruding outward from the seating part to support the rotational repulsion force of the stator. The method of claim 2, The outer circumferential surface of the insert portion is formed to correspond to the shape of the inner circumferential surface of the stator drum washing machine. A tub containing wash water and having a base portion; A motor having a rotor and a stator positioned in the base portion; And It is formed integrally with the tub, bearing housing for receiving a bearing for supporting the rotation axis of the rotor; The bearing housing includes a hub portion protruding from an outer surface of the base portion of the body and the tub, The hub is a drum washing machine, characterized in that the radius is smaller than the main body. The method of claim 4, wherein And a seating portion in which the stator is seated, in the radially outer body of the hub portion. The method of claim 5, The outer circumferential surface of the bearing housing hub portion is formed to correspond to the shape of the inner circumferential surface of the stator. The method of claim 6, The seating portion is provided with a fastening hole for coupling the stator, Drum washing machine, characterized in that the recessed portion of the seating portion is not formed in the radially inward direction. delete delete delete delete delete delete delete delete delete delete delete delete delete

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