KR100651976B1 - structure for supporting bearing housing supporting in drum type washing machine and structure of tub accompanying by thereof - Google Patents

Abstract

The present invention distributes the load applied to the tub by changing the bearing housing support structure of the drum washing machine and the tub structure accordingly, so that the rigidity of the tub can be stably secured even at high speeds such as dehydration, and the material savings of the bearing housing can be improved. It is possible to reduce the internal volume of the tub to reduce the load and to save energy.

To this end, the present invention is a drum washing machine having a tub assembly including a tub, which is formed of a substantially cylindrical sidewall and a rear wall, and having a drum rotatably installed therein, and a bearing housing mounted on a rear side of the tub; The bearing housing comprises a hub portion in the center and four bridge portions extending therefrom, the bearing housing supporting structure of the drum washing machine, characterized in that the four points are supported on the tub.

Drum Washing Machine, Bearing, Housing, Tub

Description

Structure for supporting bearing housing supporting in drum type washing machine and structure of tub accompanying by fellow}

1 is a perspective view showing an appearance example of a conventional drum washing machine

FIG. 2 is a cross-sectional view illustrating main parts of FIG. 1 and a state in which a direct motor is mounted behind the tub. FIG.

Figure 3 is a schematic view showing a bearing housing support structure of a conventional drum washing machine viewed from the direction A of Figure 2, the motor is removed

Figure 4 is a rear view of Figure 1, a schematic diagram showing a structure for fastening the bolt for transport of the conventional drum washing machine

5 is a schematic view showing a bearing housing support structure according to the present invention

Figure 6 is a rear view of Figure 4, a schematic diagram showing a transport bolt fastening structure of the drum washing machine of the present invention

Figure 7 is an exploded perspective view showing a bearing housing and tub structure according to another embodiment of the present invention

Explanation of symbols on the main parts of the drawings

1: Outcase 1a: Back cover

2: Tub 2a: Bead

2b: Indentation groove 3: Drum

4: bearing housing 4a: hub part

4b: bridge portion 5: carrying bolt

6: motor assembly 7: heater

8: reinforcement table 9: bracket

10: damper

The present invention relates to a drum washing machine, and more particularly, to an improvement in a bearing housing support structure of a drum washing machine and thus a tub structure.

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.

On the other hand, with reference to Figures 1 to 4 will be described the structure of an existing drum washing machine as follows.

1 to 4, a cylindrical tub 2 (tub) made of stainless steel is installed inside the outer case 1, and the cylindrical drum 3 is rotatable inside the tub 2. Is installed.

In addition, a damper 10 is installed below the tub 2 to absorb the vibration of the tub 2 generated during washing to attenuate the vibration.

In addition, a bearing housing fixing bracket 9 is installed at the rear end of the outer side of the tub 2 at intervals of 120 degrees on both the upper center and the lower left and right sides thereof, and the bearing B on the rear wall of the tub 2. A bearing housing 4 is formed around the housing.

At this time, the bearing housing 4 is fixed to the rear wall of the tub 2 by the fastening force of the bolt 11 penetrating the bracket 9.

Accordingly, the bearing housing 4 has a tricycle shape, one of which extends in three directions in accordance with the position of the bracket 9 is located at the top, and the other two bridge portions 4b. ) Is located at the lower left and right sides.

In addition, a stator, which is an element constituting the motor assembly 6, is coupled to the bearing housing 4.

At each end of the bridge portion 4b extending in three directions from the hub portion 4a of the bearing housing 4, a fastening hole for fastening the carrying bolt 5 is formed when the drum washing machine carries the product.

That is, when transporting the product, the carrying bolt 5 is inserted through the through hole formed in the back cover 1a of the outer case 1, and the carrying bolt 5 is upper part of the bridge portion 4b of the bearing housing 4. By fastening through the fastening hole of the bridge portion located at the side center, the tub 2 is fixed to the outer case 1, thereby preventing the phenomenon that the tub 2 flows and collides with the outer case 1 during transportation.

On the other hand, a bead (2a) for improving the strength is formed on the rear wall surface of the tub (2), the bead (2a) is formed in three places avoiding the bridge portion (4b) of the bearing housing (4). At this time, the bead (2a; bead) is formed to protrude toward the motor.

In short, the conventional drum washing machine has a structure in which the bearing housing 4 is supported by three points of the tub 2 in a trivet form, and thus, beads 2a are formed at three places, and the bearing housing ( The carrying bolt 5 is fastened to the upper bridge portion 4b of 4).

Therefore, the conventional drum washing machine having a bearing housing three-point support structure and a tub structure according to the above has various problems as follows.

First, the existing bearing housing support structure is a way of supporting the bearing housing at three points of the tub, so that the load transmitted to the tub through the bearing housing is concentrated in these three places.

In other words, vibration and motor load due to high-speed rotation are transmitted to the bearing housing 4 support point of the tub through the bearing housing as it is. In the existing structure, the force is applied to each support point by dispersing the force through only three places. This excessively large may cause deformation and breakage at the support point, in order to solve this problem, there is a disadvantage in that the thickness of the tub 2 needs to be thickened as a whole.

In addition, the bearing housing 4 must also be thickened overall to ensure rigidity that can withstand the load and system vibration of the applied motor, and thus, the existing bearing housing 4 exhibits a disadvantage in that a large material cost is required during manufacturing. .

In addition, in the conventional bearing housing 4 support structure, the bead 2a formed on the rear wall of the tub 2 in accordance with the shape of the tricycle is also three, so that the total area of the bead becomes very large. The space inside the tub 2 is also increased in proportion to the area of the bead 2a.

Accordingly, in the bearing structure of the existing bearing housing 4, the space inside the tub 2 is increased due to the beads 2a, and as much water is injected into the tub 2 when filling the same water level, energy is absorbed. There is a problem that is wasted.

Next, since the transport bolt 5 is fastened only to the bridge portion 4b positioned at the upper center of the bearing housing 4 when the product is transported, a reinforcing bar (b) is used to prevent the back cover 1a from bending. You should pad 8).

That is, when the reinforcing table 8 is not placed at the fastening portion of the carrying bolt 5 of the back cover 1a, the load during the flow of the tub 2 is fastened to the back cover 1a through the carrying bolt 5. This is because the problem of bending the fastening part of the back cover 1a occurs by being transmitted to the part.

Therefore, in the existing structure, there is a disadvantage in that the number of work and parts are increased, such as the manufacture of the reinforcement table 8 and the mounting process accordingly.

The present invention is to solve the above problems, by distributing the load on the tub by changing the bearing housing support structure of the drum washing machine and the tub structure according to it so that the rigidity of the tub is secured even at high speed rotation and In addition, the rigidity of the bearing housing is also securely secured to achieve material savings.

In addition, the present invention also has a purpose to reduce the load and energy saving by reducing the internal volume of the tub by changing the bearing housing support structure and thereby the tub structure in the drum washing machine.

In addition, the present invention is to prevent the back cover bending due to the load of the tub assembly by rotating the bearing housing support structure and the tub structure according to the present invention in the drum washing machine to put the one carrying bolt in the center to the left and right sides. The purpose is to make it possible to remove the reinforcing pads attached to the bolt fastening portion of the back cover.

In order to achieve the above object, the present invention is a drum washing machine having a tub assembly including a tub, which is made of a cylindrical side wall and a rear wall and rotatably installed therein, and a bearing housing mounted on the rear side of the tub. To; The bearing housing has a hub having a central portion and four bridge portions extending from the hub portion, wherein the bearing housing is supported by four points on the tub.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7.

First, a first embodiment of the present invention will be described with reference to FIGS. 5 and 6.

Figure 5 is a schematic view showing a bearing housing support structure of the drum washing machine of the present invention, Figure 6 is a rear view of Figure 4, a schematic diagram showing the bolt fastening structure of the drum washing machine of the present invention.

The structure of this invention is demonstrated in detail, referring an accompanying drawing. For reference, prior to describing the configuration of the present invention, in order to avoid duplication of description, the same reference numerals as those of the prior art will be referred to.

Drum washing machine of the present invention is a substantially cylindrical, consisting of a side wall and a rear wall surface and a tub (2) inside which the drum (3) is rotatably installed, and a bearing housing (4) mounted on the rear side of the tub (2). In the drum washing machine having a tub assembly comprising a; The bearing housing 4 is composed of a hub portion 4a at the center and four bridge portions 4b extending from the hub portion 4a and supported by the tub 2 at four points.

At this time, the bearing housing 4 is supported by the front end of the bridge portion 4b is fixed to the four side walls of the tub (2).

A transport bolt fastening hole (not shown) is formed at the front end of the four bridge portions 4b.

In addition, when the bearing housing 4 is installed on the rear wall surface of the tub 2, two of the four bridge portions 4b are installed to be symmetrically positioned at the upper left and right sides.

In addition, the angle between the bridge portion 4b of the bearing housing 4 preferably forms an angle of the same size.

On the other hand, a bead 2a is formed at four positions on the rear wall of the tub 2 to avoid the bridge portion 4b of the bearing housing 4, and the bead 2a is protruded toward the motor side. Will be achieved.

The bead 2a is preferably formed to have the same area when the angle α between the bridge portions 4b forms an angle having the same size.

On the other hand, in the region between the bead (2a) of the rear wall of the tub (2), the recess groove recessed toward the front of the tub (2) for mounting the hub portion (4a) and the bridge portion (4b) of the bearing housing (4) 2b) can be formed.

The operation of the present invention configured as described above is as follows.

First, the drum washing machine of the present invention changes the supporting structure of the bearing housing 4 mounted on the rear wall of the tub 2 from a three-point support method to a four-point support method, thereby changing the load on the tub 2 to four points. By dispersing through, the rigidity of the tub 2 can be stably secured even at a high speed of rotation.

Accordingly, in the four-point support system of the present invention, when the thickness of the existing tub is maintained as it is, the warpage and fracture of the tub can be more surely prevented.

In addition, in the four-point support method of the present invention, instead of reducing the thickness of the tub (2) compared to the existing, by applying a reinforcing bracket to the bearing housing (4) support portion while reducing the material input to the tub production while ensuring a stable rigidity It becomes possible.

At this time, a band-shaped bead 2c having a length in the circumferential direction is formed at a position spaced along the axial direction on the outer circumferential surface of the tub 2, thereby increasing the rigidity of the tub.

In addition, in the four-point support method of the present invention, since the load applied to the bearing housing 4 is distributed in four places, the bearing housing 4 can also be reduced in thickness to secure stable stiffness while reducing materials as compared with the conventional method. .

On the other hand, in the four-point support method of the present invention, four beads 2a on the rear wall of the tub 2 are formed, thereby reducing the total area of the beads, which in turn reduces the internal volume of the tub 2, resulting in less water and reduced load. Energy saving effect.

This is because it is advantageous to reduce the space inside the tub, unlike the space inside the drum.

That is, in the development of a drum washing machine, it is a basic pursuit direction to increase the volume of the drum into which laundry is introduced and to reduce the volume of the tub 2. In the present invention, the beads 2a are formed on the rear wall of the tub, and the bearing housing ( Since it is formed in the area between the four bridge portions (4b) of 4), the total area is inevitably reduced, thereby reducing the volume inside the tub by the beads (2a), thereby meeting the basic pursuit direction to reduce the volume of the tub Done.

In the case of the existing bearing housing 4 having a tricycle form, the bearing bolt 5 has one structure in the center of the present invention. Unlike the case where the reinforcing bar 8 is placed on the bolt fastening part of the back cover 1a to prevent the support portion of the back cover 1a from bending due to the load of the tub 2 when tightening, the removal of the reinforcing bar 8 is eliminated. It is possible, thereby reducing the number of labor and parts in manufacturing.

That is, in the structure of the present invention, the carrying bolt 5 can be fastened to the bearing housing immediately through the bolt fastening hole of the back cover 1a without a reinforcing rod.

On the other hand, Figure 7 is an exploded perspective view showing the bearing housing 4 and the tub structure according to another embodiment of the present invention, in this case the installation space of the heater 7 for washing boiled on the tub 2 lower side In the case where the lower side of the tub 2 has an elliptical structure in order to provide the bearing housing and the tub structure are shown.

At this time, the bearing housing 4 has an elliptical shape of the lower side of the tub 2, and thus, between the angle α of the upper two bridge portions 4b and the lower two bridge portions 4b. The angle β is formed to form an angle of different sizes, so that the angle β between the two lower bridge portions 4b is larger than the angle α between the two upper bridge portions 4b. Preferably formed.

This is because the area of the lower side of the tub 2 is wider than that of the upper side, and this is considered an advantage.

In addition, the bead 2a is preferably formed such that the upper bead and the lower bead have different areas as the lower side of the tub 2 has an elliptical shape.

On the other hand, also in this case, the bearing housing 4 is of course supported by the front end of the bridge portion (4b) is fixed to the four points of the side wall of the tub (2), of course, carrying bolts at the front end of the four bridge portion (4b) Of course, fastening holes (not shown) are formed.

Also in this case, of course, when the bearing housing 4 is installed on the rear wall of the tub 2, two of the four bridge portions 4b are installed so as to be symmetrically positioned on the upper left and right sides.

On the other hand, also in this case, the tub 2 is recessed toward the front of the tub 2 for mounting the hub portion 4a and the bridge portion 4b of the bearing housing 4 in the region between the beads 2a of the rear wall of the tub 2. Of course, the recessed groove 2b can be formed.

The embodiment of the present invention described above is merely an example for expressing the technical idea of the present invention in detail, and various changes, positions, materials, shapes, etc. of the components can be variously applied within the scope without departing from the technical idea of the present invention. It can be obvious.

The present invention improves the bearing housing (4) support structure of the drum washing machine from the three-point support method to the four-point support method, thereby effectively distributing the load on the tub (2) to increase the rigidity of the tub (2) at high speed rotation such as dehydration. It secures stable and bearing housing also can secure stable stiffness while saving material compared with the existing.

In addition, the bead (2a) of the rear wall of the tub (2) has four bead reduction in the total area of the bead is eventually reduced the internal volume of the tub, there is less water and the load is reduced, thereby reducing the energy.

In the case of the existing bearing housing having a tricycle form, the bearing bolt 5 has one structure in the center of the present invention. In order to prevent the back cover 1a of the outer case 1 from being bent due to the load of the tub 2, the reinforcing bar 8 padded at the fastening portion of the carrying bolt 5 of the back cover 1a can be removed. As a result, the number of labor and parts during manufacturing can be reduced.

Claims (12)

A tub which is formed of a substantially cylindrical side wall and a rear wall and has a drum rotatably installed therein; A drum washing machine having a tub assembly including a bearing housing mounted on the tub rear side; The bearing housing comprises a hub portion in the center and four bridge portions extending from the hub portion, the bearing housing supporting structure of the drum washing machine, characterized in that the four points are supported on the tub. The method of claim 1, The bearing housing is a bearing housing supporting structure of a drum washing machine, characterized in that the front end of the bridge portion is fixed and supported on the four side walls of the tub. The method of claim 1, Bearing housing supporting structure of the drum washing machine, characterized in that the transport bolt fastening hole is formed at the front end of the four bridge portion. The method according to claim 1 or 2, When the bearing housing is installed on the rear wall of the tub, the bearing housing support structure of the drum washing machine, characterized in that the two bridging portions of the four bridge parts are installed to be symmetrically located on the upper left and right. The method according to claim 1 or 2, Bearing angle support structure of the drum washing machine, characterized in that the angle between each bridge portion of the bearing housing is the same size. The method according to claim 1 or 2, The bearing housing, When the tubular lower side shape is oval, the bearing angle of the drum washing machine is characterized in that the angle between the upper two bridge portions and the lower side between the two bridge portions to form an angle of different sizes. The method of claim 1, On the rear wall surface of the tub, The tub structure according to the bearing housing four-point support structure of the drum washing machine, characterized in that the bead is formed in four places avoiding the bridge portion of the bearing housing. The method of claim 7, wherein The tub structure according to the four-point support structure of the bearing housing of the drum washing machine, characterized in that the bead is formed to protrude toward the motor side. The method according to claim 7 or 8, The bead tub structure according to the four-point support structure of the bearing housing of the drum washing machine, characterized in that to form the same area. The method according to claim 7 or 8, The bead tub structure according to the four-point support structure of the bearing housing of the drum washing machine, characterized in that the upper bead and the lower bead is formed to have a different area when the bottom shape of the tub is oval. The method according to claim 7 or 8, In the area between the beads on the rear wall of the tub, Tub structure according to the bearing housing 4-point support structure of the drum washing machine, characterized in that the recessed groove is formed in the front of the tub for mounting the hub portion and the bridge portion of the bearing housing. The method according to claim 7 or 8, At a position spaced apart along the axial direction on the tub outer circumferential surface, Tub structure according to the four-point support structure of the bearing housing of the drum washing machine, characterized in that the belt-shaped bead having a length in the circumferential direction of the tub.

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