KR20090046063A - Washing machine - Google Patents

Abstract

The present invention relates to a washing machine, and more particularly, to a drum washing machine that can reduce the noise and vibration generated during the washing operation.

The present invention provides a washing machine comprising a tub, an insert injection into the tub, a bearing housing having a first fastening portion protruding from the rear wall portion of the tub, and a stator coupled to the first fastening portion. do.

Drum washing machine, tub, drum, bearing, rotating shaft

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine, and more particularly, to a washing machine that can reduce the noise and vibration generated during the washing operation.

1 is a longitudinal sectional view showing a conventional washing machine configuration, and FIG. 2 is an enlarged detail view of a portion A shown in FIG. 1, and is a longitudinal sectional view of a driving unit structure of the conventional washing machine.

1 and 2, a washing machine according to the related art includes a tub 2 installed inside the cabinet 1, a drum 3 installed inside the tub 2, and a shaft on the drum 3. In the drum washing machine having a shaft 4 connected to transfer the driving force of the motor 5 to the drum 3 and bearings installed on the outer circumferential surface of both ends of the shaft 4, the tub 2 is made of plastic material, In the center of the rear wall portion 30 of the tub 2, a bearing housing 7 made of metal for supporting bearings installed on the outer circumferential surfaces of both ends of the shaft 4 is provided.

In this case, the metal bearing housing 7 is configured to be integral with the tub rear wall portion 30 by insert injection during injection molding of the tub 2 made of plastic, and the bearing housing 7 is made of aluminum alloy. Is done.

Meanwhile, the rotor 13 constituting the direct type motor 5 is fastened to the center of the rear end of the shaft 4, and the rotor 13 is fastened and fixed to the rear wall 30 of the tub 2 inside the rotor 13. Together with 13), the stator 14 constituting the direct type motor is located.

On the rear wall portion 30 of the tub 2 is provided a hub 201 in which the bearing housing 7 is inserted therein at the time of injection molding of the tub, and a stator is formed on the outer side of the hub 201 using a fastening member 15a. A fastening boss 202 for fixing 14 to the rear wall portion 30 of the tub 2 is provided spaced apart at regular intervals along the circumferential direction.

And between the rear wall portion 30 and the stator 14 of the tub 2 is substantially the same shape as the outer shape of the rear wall portion 30 of the tub and is fixed to the rear wall portion 30 of the tub when the stator 14 is fastened to the stator ( The supporter 17 which supports 14 is interposed.

At this time, the front end portion of the supporter 17 is in close contact with the inner surface of the rib 203 on one side of the tub rear wall portion 30, and the rear end portion of the supporter 17 is exposed to the center of the rear wall portion 30 of the tub 7. It is configured to be in close contact with the outer peripheral surface of the rear end.

In addition, in order to fasten the supporter 17 and the tub rear wall part 30, a plurality of fastening members 15d are coupled inside the outer circumferential surface of the supporter 17, and in order to fix the stator 14 to the supporter 17. It has another fastening member 15a.

The washing machine according to the prior art requires a fastening member for installing the supporter because the supporter is installed on the back of the tub to couple the metal stator to the tub of the synthetic resin. There is a problem that is difficult to reduce the number of parts.

In addition, the washing machine according to the prior art is installed on the supporter because the supporter of the metal material is coupled to the back surface of the tub made of synthetic resin by the fastening member, so that the supporter may be deformed from the correct position while the tub of the synthetic resin is deformed during the fastening operation. There is a problem that it is difficult to maintain the concentricity of the stator because it is not easy to install the stator at the correct position.

In addition, in the washing machine according to the prior art, since the tub is interposed between the stator and the bearing housing, there is a problem that the coupling state of the stator is loosened due to the wear of the tub for a long time, and concentricity is difficult to maintain.

Therefore, there is a need for improvement.

The present invention has been made to solve the above problems, and an object thereof is to provide a washing machine that can reduce the number of parts required for motor installation.

It is also an object of the present invention to provide a washing machine in which the spacing between the members is accurately maintained and can be stably coupled.

In order to achieve the above object, the present invention includes a tub, a bearing housing is inserted into the tub, the first housing is formed to protrude from the rear wall of the tub, and the stator coupled to the first fastening portion It provides a washing machine characterized in that.

In addition, the first fastening portion of the present invention provides a washing machine, characterized in that the seating portion is formed in which the stator is surface contact.

In addition, the first fastening portion of the present invention provides a washing machine comprising a fastening hole.

In addition, the fastening hole of the present invention provides a washing machine characterized in that a screw thread is formed.

In addition, the present invention provides a washing machine, characterized in that the second fastening portion is further formed on the rear wall of the tub is coupled to the stator.

In addition, the second fastening part of the present invention provides a washing machine comprising a boss member having a fastening hole formed therein.

In addition, the boss member of the present invention provides a washing machine, characterized in that the injection molding integrally with the tub.

In addition, the stator corresponding to the boss member of the present invention provides a washing machine characterized in that the insertion hole is formed.

In addition, the second fastening portion of the present invention provides a washing machine, characterized in that disposed on the same circumference as the first fastening portion.

In the washing machine according to the present invention, since the bearing housing is wrapped in the tub and the stator is installed in the bearing housing, the stator can be installed in the tub without any additional member, so the number of parts required for motor installation is reduced, and thus the motor is required for manufacturing and installation. There is an advantage to save time and costs.

In addition, in the washing machine according to the present invention, the bearing housing is wrapped by the tub so that vibration generated in the shaft during motor driving is dispersed, and a seating portion corresponding to the stator is formed in the fastening hole of the bearing housing, thereby providing a relatively fastening strength. The metal stator and the seating part of the bearing housing are fastened in contact with each other so that the gap between the stator and the bearing housing is accurately maintained, and the tightening force between the stator and the tub is enhanced by the reinforcement part, so that vibration and noise generated while driving the washing machine can be achieved. This has the advantage of being reduced.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a drum washing machine according to the present invention.

For convenience of explanation, a drum washing machine will be described as an example.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom.

Therefore, the definitions of these terms should be made based on the contents throughout the specification.

On the other hand, for convenience of description, the same parts or structures as the conventional invention and the same parts use the same reference numerals or names.

3 is a perspective view showing the mounting structure of the driving apparatus for a drum washing machine according to an embodiment of the present invention, Figure 4 is a plan view showing the mounting structure of the driving apparatus for a drum washing machine according to an embodiment of the present invention.

3 and 4, a washing machine according to an embodiment of the present invention includes a bearing housing in which inserts are injected into the tub 50 and the tub 50, and the first fastening part 70 is exposed. 56 and a stator 80 coupled to the first fastening part 70.

Thus, when the tub 50 is manufactured, the bearing housing 56 is wrapped in the rear wall of the tub 50 to be integrally formed, and then stator is formed on the first fastening portion 70 exposed from the rear wall of the tub 50. 80 can be easily combined.

Here, the bearing housing 56 is insert injection into the tub 50, the tub 50 is made of a synthetic resin material, the bearing housing 56 is made of a metal material.

As a result, the bearing housing 56 rotatably supporting the shaft 4 (see FIG. 2) connected to the drum 3 (see FIG. 1) can easily support the shaft 4 with high fastening strength. The tub 50 made of a synthetic resin material has good castability, so that the structure in which the bearing housing 56 is wrapped can be easily achieved.

The bearing housing 56 is preferably made of aluminum.

Of course, the tub 50 may be made of a metal material, and in this case, it is possible to implement a structure in which the bearing housing 56 is wrapped in the tub 50 made of a metal material by a die casting process.

5 is a cross-sectional view taken along the line A-A shown in Figure 3, Figure 6 is a state diagram showing the driving device for a drum washing machine according to an embodiment of the present invention.

5 and 6, since the first fastening part 70 is installed to protrude from the rear wall of the tub 50, when the stator 80 is seated on the first fastening part 70, the stator 80 and the first fastening part 70 are installed. Since there is no member interposed between the first fastening part 70, the first fastening part 70 and the stator 80 are in close contact with each other, so that the coupling force between the bearing housing 56 and the stator 80 is loosened even when the washing machine is driven for a long time. You can do it.

In addition, the first fastening portion 70 is formed with a seating portion 74, the surface of the stator 80 is coupled to the surface contact, the first fastening portion 70 is the rear end portion of the tub 50 is exposed because the surface exposed 1 Fastening portion 70 and the stator 80 is to be in close contact more effectively.

In addition, since the first fastening part 70 includes a fastening hole 72, and a screw thread 76 is formed in the fastening hole 72, the stator 80 is seated on the first fastening part 70, and then the stator ( When the coupling member is coupled to the through hole 82 and the coupling hole 72 of the 80, the installation of the stator 80 may be easily performed.

In addition, a second fastening portion 90 to which the stator 80 is coupled is further formed at the rear wall of the tub 50 to improve the fastening strength between the stator 80 and the bearing housing 56.

Since the second fastening part 90 includes a boss member 92 (see FIG. 2) having fastening holes, the second fastening part 90 can fasten the stator 80 and the bearing housing 56 by the fastening member.

The boss member 92 is injection molded integrally with the tub 50, and since the thread is not formed on the inner wall, the fastening member is coupled while stamping the thread to improve the bonding strength between the stator 80 and the tub 50. The effect is shown.

In addition, the boss member 92 of the second fastening portion 90 is disposed on the same circumference as the first fastening portion 70, and alternately disposed with the first fastening portion 70.

The stator 80 corresponding to the boss member 92 of the second fastening part 90 is formed with an insertion hole 94 through which the fastening member penetrates, so that the fastening member into which the insertion hole 94 is fitted is the second fastening part 90. Being coupled to the boss member 92 of the) it is possible to achieve the coupling between the tub 50 and the stator (80).

Looking at the operation of the washing machine according to an embodiment of the present invention configured as described above are as follows.

First, when the bearing housing 56 is installed on the tub 50, the bearing housing 56 is installed on the rear surface of the tub 50 by insert injection, and at this time, the seating portion 74 is the rear surface of the tub 50. It is arranged to protrude a predetermined amount from.

Thereafter, the through hole portion 82 of the stator 80 is disposed to correspond to the seating portion 74, and then a fastening member is inserted to couple the through hole portion 82 and the fastening hole 72.

At this time, the fastening operation of the fastening member is easily performed by the screw thread 76 formed on the inner wall of the fastening hole 72, and the fastening operation is performed while the seating portion 74 made of a metal material and the stator 80 are in contact with each other. Since the operation is performed, the work is performed in a state where the distance between the stator 80 and the bearing housing 56 is uniformly maintained.

Subsequently, when the fastening member is inserted through the insertion hole 94 to be fastened to the boss member 92, the thread is imprinted on the inner wall of the boss member 92 made of synthetic resin, and the insertion hole 94 and the boss member 92 are formed. Will be made.

As a result, the tightening force between the stator 80 and the tub 50 is improved, so that the gap between the stator 80 and the tub 50 can be suppressed from being changed by vibration generated during driving of the motor 5 (see FIG. 2). It becomes possible.

By the above-described configuration and operation, it becomes possible to operate a quiet and stable washing machine in which vibration and noise generated by driving the motor 5 are reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand.

In addition, the drum washing machine has been described as an example, but this is merely exemplary, and the driving device of the present invention may be used in other products than the driving device used in the drum washing machine.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a longitudinal sectional view showing a washing machine configuration according to the prior art.

FIG. 2 is an enlarged detail view of a portion A shown in FIG. 1, which is a longitudinal sectional view of a driving unit structure of a washing machine according to the related art.

3 is a perspective view illustrating a mounting structure of a driving apparatus for a drum washing machine according to an embodiment of the present invention.

Figure 4 is a plan view showing a mounting structure of the driving device for a drum washing machine according to an embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A shown in FIG.

6 is a use state diagram showing a driving device for a drum washing machine according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

50: Tub 56: Bearing Housing

70: first fastening portion 72: fastening hole

74: seating portion 76: thread

80: stator 82: through hole

90: second fastening portion 92: boss member

94: insertion hole

Claims (9)

Tub; A bearing housing inserted into the tub and having a first fastening portion protruding from the rear wall of the tub; And Washing machine comprising a stator coupled to the first fastening portion. The method of claim 1, The first fastening part is a washing machine, characterized in that the seating portion is formed in the surface contact coupling the stator. The method according to claim 1 or 2, The first fastening part washing machine characterized in that it comprises a fastening hole. The method of claim 3, wherein The fastening hole is characterized in that the screw thread is formed. The method according to claim 1 or 2, Washing machine, characterized in that the second wall is further formed on the rear wall of the tub is coupled to the stator. The method of claim 5, wherein The second fastening part washing machine characterized in that it comprises a boss member with a fastening hole is formed. The method of claim 6, The boss member is a washing machine, characterized in that the injection molding integrally with the tub. The method of claim 6, Washing machine, characterized in that the insertion hole is formed in the stator corresponding to the boss member. The method of claim 5, wherein And the second fastening portion is disposed on the same circumference as the first fastening portion.

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