RU2655254C1 - Household appliance for processing linen, containing specially construction line between drum and crossband - Google Patents

Abstract

FIELD: textile.

SUBSTANCE: household laundry treating device comprising: laundry drum, rotatably mounted about horizontal axis (A), and cross, located behind rear, when viewed in axis direction (A), by drum wall connected to drum and containing several cantilever beams extending in radial directions, while between each of cantilever beams and drum rear wall is distance in axial direction (d) in such a way that gap is formed between cantilever beams and rear wall when viewed in the direction of rotation around axis (A), on cantilever beams side, flow gap is defined by wall containing first wall portion oriented with respect to plane (E) perpendicular to axis (A), at first angle (α), ranging from 20° up to 70°.

EFFECT: invention is intended for laundry treatment.

15 cl, 3 dwg

Description

FIELD OF THE INVENTION

The invention relates to a household appliance for processing laundry, comprising a drum for receiving laundry, mounted for rotation around a horizontal axis, and a cross located behind, when viewed in the direction of the axis, the wall of the drum and connected to the drum. The crosspiece contains several cantilever beams extending in radial directions.

State of the art

Washing machines typically comprise a rotary drum for laundry. To do this, a cross is provided, which is usually located behind the rear wall of the drum and rigidly connected to the drum without the possibility of relative rotation. As the horizontal axis of rotation of the drum, one also understands that axis of rotation that is inclined relative to the horizontal and whose angle of inclination is less than 45 °, i.e. the axis of rotation is essentially horizontal.

Examples of implementation are known from patent documents DE 4326496 C2 and DE 102004047 996 A1. It is also known from them that the crosspiece is connected to the drive shaft without the possibility of relative rotation, so that the laundry drum rotates concentrically relative to the bearing of the washing solution tank inside the tank for the washing solution.

It is known that during the operation of washing machines with a rotating drum and, thus, also a rotating cross during their immersion in the tank for the washing solution, the washing solution is captured by cantilever beams, and it directly or indirectly enters the bearing in the form of streams of water or water sprays and thus is transmitted also to its compaction system. If, after this, water also penetrates the seal element in the direction of the bearing, then this may damage the bearing located there, such as a rolling bearing. In this regard, it is possible to form deposits in the bearing in the form of a crust and particles, which, upon further rotation of the drum, abrasively act on the sealing element. The drum system transports water, or washing solution, to the sealing system, for example, due to the fact that the rotating console of the crosspiece, like a paddle wheel, captures water from the washing solution tank on the front side or on the cantilever structure and is discarded to the outside, as a result of which water flows or water spray. Another possibility of the corresponding transportation of water is that on the rotating rear wall of the drum, as well as on the connecting line of the fold of the drum, the water forms a water film passing around the circumference, which at the points of narrowing, for example, between the spider console and the bottom disc, or rather the back wall , drum, meets obstacles, and, tearing, is also thrown to the outside.

In addition, in known structures in which the cantilever beams are directly adjacent to the rear wall, a film of water passing around the circumference encounters an obstacle and breaks down from the console of the cross. As a result of this, when the drum rotates, a significant amount of water is thrown to the entire rear wall of the tank for the washing solution or, accordingly, is transported directly to the drum shaft and the sealing system.

Further, the pile particles and small foreign bodies in the washing solution also enter the back wall of the washing solution tank, into the drum system and the sealing system, where these particles can dry. Dried particles cause crusting and also, when the drum rotates, have an abrasive effect on the compaction system.

In the case of a crosspiece fixed in the axial direction, the drum system causes less significant formation of water sprays and water flows. Therefore, in known devices, water penetration into the bearing sealing system is considered to be the most common cause of bearing damage, and in this connection, rust formation may occur in the bearing.

Disclosure of the invention

The objective of this invention is to create such a household appliance for processing laundry, in which the occurrence of damage to the bearings due to the penetration of liquid into the drum and cross section is at least reduced.

This problem is solved by a household appliance having the features of claim 1.

A household appliance according to the invention for processing laundry comprises a drum for receiving laundry. This drum is rotatably mounted about an axis. In addition, the household appliance contains a cross, which is located behind the rear wall of the drum, when viewed in the direction of this axis of rotation, and connected to the drum. The crosspiece contains several cantilever beams extending in the radial direction. An essential idea of the invention is that an axial distance is made between each of the cantilever beams and the rear wall in such a way that there is a continuous gap between the cantilever beam and the rear wall of the drum, when viewed in the direction of rotation around this axis of rotation. From the side of the cantilever beams, the leakage gap is limited by the wall, which contains the first wall section. This first wall section, at least in places, is oriented at a first angle from 20 ° to 70 ° relative to a plane perpendicular to the axis around which the cross and the drum rotate. Thanks to the invention, the flow gap, thus oriented in the direction of rotation around the axis, creates a quasichannel through which the fluid captured during rotation of the drum and the spider from the detergent solution tank is fed further in the direction of rotation without collision with the spider and, in particular , with cantilever beams and thus without splashing. Due to the distance thus set between the cantilever beam and the rear wall, this leakage gap is also defined and, thus, a channel for conducting the fluid is formed, which enables the desired and specific fluid for the given location in the region of the cantilever beam.

In addition, according to the invention, this leakage gap is also determined by the fact that a special wall is formed in a special way, namely a wall located opposite the rear wall and bounding the leakage gap. Such very special geometrical characteristics of this first wall section also make it possible to avoid a collision of a liquid medium passing through it with very steep wall sections, in particular, located perpendicular to the direction of flow, and thus also undesirable splashing or spraying in the opposite direction. Thus, the completely special orientation of the first wall section also enables the targeted flow of fluid in the flow gap.

Thus, the invention prevents the ingress of unwanted streams of water or water spray, in some cases with particles, such as a pile or the like, into the bearing sealing system, by means of which a drum and / or spider and / or tank for cleaning solution is installed, and getting them through the sealing system into the bearing. The invention makes it possible to at least substantially reduce the aforementioned bearing damage due to penetrating water sprays or water flows entering this bearing due to the rotational movement of the spider and the drum.

Said first angle between the first wall portion and the plane perpendicular to the axis of rotation of the spider and the drum is preferably 30 ° to 55 °. Thus, the orientation of the first wall portion has a very preferred inclined position, whereby a very uniform passage of the liquid medium flowing through the flow gap is achieved.

Preferably, the first wall sections are provided on opposite sides of the longitudinal axis of the cantilever beam. This creates appropriately preferred geometric characteristics both when entering this leakage gap and when leaving the leakage gap, so that the formation of unwanted water splashes or water flows at both ends of the leakage gap is at least significantly reduced.

Preferably, it is provided that the first wall sections are made symmetrically with respect to the longitudinal axis of the cantilever beam.

The wall on the side of the cantilever beam preferably comprises a second wall portion that is adjacent to the first wall portion.

The second wall section is oriented relative to a plane perpendicular to the axis of rotation, at a second angle, in particular smaller than the angle for the first wall section. Thus, in the cross-sectional image perpendicular to the longitudinal axis of the cantilever beam, both wall sections preferably form a broken or stepped wall shape, which further favors the above-mentioned advantages. Thus, the wall expands with this second wall section in the direction perpendicular to the longitudinal axis of the cantilever beam, and thereby the leakage gap is also extended. As a result, the likelihood of unwanted water splashes or streams of water and their movement in an undesirably large amount in the direction of the bearing is further reduced. Thanks to the special design of the second wall section, both at the entrance of the liquid medium into the leakage gap and at the exit from it, it is as if deviations, or more precisely, the removal of the liquid medium from the bearing, are achieved.

The second angle is preferably from 0 ° to 20 °, in particular from 0 ° to 10 °, and the angle can be either positive or negative. In this embodiment, there is provided a particularly flat, or very slightly inclined, construction of the second wall section, so that the liquid medium is also carried out very close to the rear wall of the drum, and when entering the flow gap, and when exiting it, there is no undesired tearing from the back of the drum.

Also, in addition to or instead of the above embodiment, it is possible to perform the second wall section curved, at least in places. In particular, curvature in the direction of the rear wall of the drum may be provided.

The second wall section is preferably located at a greater distance from the longitudinal axis of the cantilever beam than the first wall section. Therefore, the geometric characteristics of the flow gap are generally particularly preferred with respect to the above aspects.

Preferably, it is provided that the second wall sections are made on opposite sides of the longitudinal axis of the cantilever beam, in particular, they are made symmetrically with respect to the longitudinal axis of the cantilever beam. Thus, in the cross-sectional image perpendicular to the longitudinal axis of the cantilever beam, a wall is formed, in particular in the second sections of the wall, with geometric characteristics similar to those of the blades.

The leakage gap is preferably made in at least one such portion of the length of the cantilever beam radially external to the axis of rotation of the cross, which, when turned around the axis, is immersed in the washing solution in the washing solution tank of the household appliance. Since it is precisely these special sections of the length or length region of the cantilever beam that also significantly contribute to conducting the fluid captured during rotation, such local features of the clearance for flowing with a special wall shape are particularly preferred.

In particular, the wall limiting the clearance gap on the side of the cantilever beam is made on at least one such section of the length of the cantilever beam radially external to the axis of rotation of the cross, which, when turned around the axis, is immersed in the washing solution in the washing solution tank of the household appliance. It also holds true for the leakage clearance above.

In a preferred embodiment, a wall defining a leakage gap on the side of the cantilever beam is integrated in the cantilever beam. This is a particularly preferred embodiment, since in this way the number of parts is reduced and installation costs are minimized. But especially important is the very precise location of the cantilever beam as such relative to this wall, achieved in this embodiment, since there are no undesirable location tolerances due to embedding, in particular during operation, that is, when the crosspiece rotates.

It may also be envisaged to provide a wall located on the side of the cantilever beam and limiting the gap for leakage, or at least a portion of the wall, in the form of a part separate from the crosspiece and covering the cantilever beam in the form of a casing on the side of the cantilever beam opposite to the leakage gap. Such an embodiment allows the further regular batch production of the crosspiece to be continued appropriately and to achieve the desired functionality by means of a corresponding additional part, namely a casing that contains the bounding wall, or portions of the bounding wall, for a leakage gap.

The casing may be provided in the form of a gutter or in the form of a U-shaped profile, the casing extending along the length of the cantilever beam to be coated. By means of such geometrical characteristics and such overall length, a preferred embodiment is also achieved which prevents undesired penetration of the liquid medium into the bearing.

The formation of at least a first portion of a wall defining a leakage gap may be provided in the sidewall of this casing, if it is made in the form of a part in the form of a gutter.

It may also be provided that the casing is made thickened in the direction of rotation around the axis around which the crosspiece and the drum rotate, on such a section of the length of the cantilever beam radially external to this axis of rotation of the crosspiece, which, when turned around the axis, is immersed in the washing solution in the household washing solution tank. instrument. Owing to this particular thickening in the direction of rotation around the axis of rotation, it is particularly advantageous from the point of view of dimensions and geometrical characteristics to realize this wall integrated in the casing, which limits the clearance for leakage, and therefore also have a very strong casing in this area. Then this casing has the corresponding torsional rigidity even at very high rotational speeds, so that the desired effect on the targeted conduct of the received liquid medium is also preserved in these phases of the working cycle.

Otherwise, in those areas in which the undesirable penetration of liquid to the bearing does not already appear or only appears conditionally, there is no need for an appropriate choice of casing sizes with a margin of thickness, so that in this particular embodiment, the casing dimensions are not excessive.

Preferably, it is provided that the size of the clearance for flow in the axial direction, i.e. in the direction of the axis of rotation of the spider and the drum, is at least 6 mm, preferably at least 7 mm.

According to the invention or a preferred embodiment, the liquid medium captured during the rotational movement of the crosspiece and the drum is defined and desired along the rear wall of the drum and is able to flow there freely and unhindered. As a result of this, the drum shaft, the back wall of the washing solution tank and the bearing sealing system during the rotational movement of the drum are left without streams of water and water spray, as well as without a crust formed by particles or foreign bodies. Thus, this allows at least a significant reduction in the likelihood of unwanted bearing damage.

Further features of the invention follow from the claims, drawings and description of the drawings. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the drawings and / or only shown in the drawings, are applicable not only in the respective indicated combinations, but also in other combinations or individually, without going beyond inventions. Thus, embodiments of the invention that are not shown explicitly and not explained in the drawings, however, follow from the explained embodiments and can be deduced from them based on divided combinations of features, should also be considered as contained in the invention and disclosed therein.

Brief Description of the Drawings

Embodiments of the invention are explained below in more detail by way of schematic drawings. They show:

FIG. 1 is a schematic sectional view of an embodiment of a household appliance according to the invention;

FIG. 2 is a horizontal sectional view of a household appliance in the region of a rear wall of a drum and a cross; and

FIG. 3 - axonometric partial image of the cantilever beam of the cross with the casing.

In the drawings, the same or functionally similar elements are provided with the same designations.

The implementation of the invention

In FIG. 1 is a longitudinal or vertical sectional view of a household appliance for treating laundry, which is a washing machine I. Washing machine I comprises a housing 1 in which an oscillating system 2 is located. Oscillating system 2 comprises a tank 3 for a washing solution of washing machine I. In addition, the washing machine I, as well as the oscillating system 2, comprises a drum 4, which in the embodiment is mounted to rotate about an axis A oriented horizontally and, thus, in the x direction. The drum 4 is designed to receive linen and is surrounded by a tank 3 for washing solution. The drum 4 is made to rotate by means of a shaft 5, the axis of which is also oriented horizontally and coincides with axis A. For the drive, for example, a pulley 6 and a belt 7 are provided, which are driven by a motor 8, in particular an electric motor. In addition, the oscillating system 2 contains springs 9 and a shock absorber 10. The tank 3 for the washing solution contains on the rear side or on the rear wall, a crosspiece 11 visible only from the side, in the center of which there is a bearing 12 for the shaft 5 of the drum 4.

In addition, the washing machine I contains a crosspiece 13 for the drum 4. As you can see, the crosspiece 13 is located behind the rear, when viewed in the direction of the axis A, by the wall 14 of the drum 4 and connected to the drum 4. In addition, the crosspiece 13 is connected to the shaft 5 without relative rotation, so that it is possible to rotate the drum 4 within the tank 3 for the washing solution concentrically relative to the bearing 12. The crosspiece 13 for the drum 4 for linen contains several cantilever beams, for example three cantilever beams that are located on overt distances from each other in the rotational direction around the axis A. The cantilever beams extend radially with respect to axis A.

The implementation of the washing machine I in the region between the rear wall 14 and the spider 13 is explained in more detail below. For this, in FIG. 2 shows an axonometric image of a horizontal section and, thus, a section in the x-z plane.

In this regard, a section is shown of the cantilever beam 15 of the spider 13. It is seen that the outer side 14a of the rear wall 14 facing the cantilever beam 15 is non-planar and, in particular, in the region in which the cantilever beam 15 extends with its longitudinal axis B perpendicular to the plane of the drawing contains a recess. The cantilever beam 15 enters this recess in some places when viewed in the axial direction.

It can be seen that between the cantilever beam 15 and the outer side 14a of the rear wall 14, a distance is measured, measured as a distance d, preferably greater than or equal to 7 mm. It is envisaged that the cantilever beam 15, when viewed in the direction of rotation about the axis A, is completely located at a distance from this outer side 14a of the rear wall 14. As a result, a leakage gap 16 is formed that is oriented in the direction of rotation around the axis A. On one side, in the direction axis A, this leakage gap 16 is limited by the outer side 14a, on the other hand is limited by a wall 17, which is located opposite the outer side 14a and is made on the cantilever beam. In the image of FIG. 2 it can be seen that the flow gap 16 has an inlet 16a and an outlet 16b, and the direction of flow of the fluid or fluid flowing through it is represented by arrows P. This is the fluid that is captured during rotation of the drum 4 and the spider 13 around axis A during immersion in the tank 3 for the cleaning solution and rotates with them.

The wall 17 is made in such a special way that it contains the first wall sections 18, which according to this sectional view in FIG. 2 are preferably symmetrical about axis B. These first wall sections 18 are oriented toward plane E at an angle α, which is from 20 ° to 70 °, preferably from 30 ° to 55 °. The plane E is perpendicular to the axis A and oriented in the image of figure 2 perpendicular to the plane of the drawing. Thus, the plane E extends in the length direction of the cantilever beam 15. The first wall sections are preferably mounted in the same direction at the same angle as the opposite wall sections in the recess of the outer side 14a. As a result of this, a substantial contribution to the uniform flow of fluid in the flow gap 16 occurs.

In addition, in the embodiment, it can be seen that the wall 17 contains second wall sections 19, which in the shown embodiment are also made on both sides of the axis B, in particular symmetrically to it.

These second wall sections 19 are directly adjacent to the first wall sections 18 and are oriented relative to the plane E at an angle β smaller than the angle α. This angle β is not shown in FIG. 2, since it is preferably 0 °. This angle β may preferably be from 0 ° to 20 °, in particular from 0 ° to 10 °. The second wall portions 19 are preferably inclined towards the rear wall 14, however, they can also be inclined in the opposite direction. Therefore, the angle B can be both positive and negative. As can be seen, wall 17 with its first wall sections 18 and second wall sections 19 is made in the form of a body with blades or wings. The first wall sections 18 are therefore located closer to axis B than the second wall sections 19. Due to these special geometrical characteristics of the wall 17, the leakage gap 16 is made completely individually, which allows the liquid medium to flow through it also evenly and without undesirable collisions with the walls, so that unwanted water splashes or water flows do not enter the bearing 12. In particular, by means of additional second wall sections 19, an extension of the leakage gap 16 is achieved in the direction perpendicular to axis B, and in particular in the direction perpendicular to axis B, in the plane of the drawing, so that the movement of the corresponding liquid to the bearing 12 is further significantly reduced. Due to the special orientation and geometrical characteristics, in particular, of the second wall sections 19, both at the inlet 16a and at the outlet 16b from the flow gap 16, a direction of flow of the liquid medium is also maintained that leads it away from the bearing 12 and, in particular, also causes a significant adhesion of the liquid medium to the rear wall 14 also after exiting the leakage gap 16. In FIG. 2, the index 12 indicates the position of the bearing 12 not shown in other cases.

In the second wall sections 19, for water droplets formed during the flow, which, when leaving the leakage gap 16 at the exit 16b, depart from the second wall section 19 due to the rotation of the drum 4 and the crosspiece 13, in turn, their flow along the rear wall is also preferably achieved 14, including due to the axial position of the second wall sections 19 and the convex shape of the rear wall 14.

The leakage gap 16 is preferably made at least in such a portion of the length of the cantilever beam 15 when viewed in the direction of the longitudinal axis B of the cantilever beam 15, which, when the crosspiece 13 is rotated, is immersed in the washing solution in the washing solution tank 3.

In FIG. 3 is a perspective view of an alternative embodiment in which a wall 17 is integrated into the casing 20. This casing 20 is a separate part that can be connected to the cantilever beam 15. This casing 20 is preferably in the form of a gutter or U-shaped profile and preferably covers the cantilever beam 15 along its entire length B. This casing 20 is located on the side of the cantilever beam 15 opposite the rear wall 14, and the casing 20 also contains the first wall sections 18 and the second ones facing the rear wall 14 heel wall 19, which in particular also in turn provided symmetrically relative to the axis B.

This casing 20 comprises a top 21 and sidewalls 22 and 23, with each of the sidewalls 22 and 23, respectively, having one first wall section 18 and one second wall section 19. This is provided, in particular, in the section 24, thickened in the direction of rotation around axis A, which is the outer, radially relative to axis A, section of the length of the casing 20, as well as the cantilever beam 15. It is this section of length 24 that is immersed in the washing solution tank for cleaning solution during rotation of the cross 13 around axis A.

Designation List

I washing machine

1 building

2 oscillatory system

3 tank for washing solution

4 drum

5 shaft

6 pulley

7 belt

8 engine

9 springs

10 shock absorber

11 cross

12 bearing

13 cross

14 back wall

14a outer side

15 cantilever beam

16 leakage gap

16a input

16b output

17 wall

18 first wall section

19 second wall section

20 casing

21 top

22 sidewall

23 sidewall

24 length section

α angle

β angle

And the axis

In the longitudinal axis

E plane

P arrow

d distance.

Claims (15)

1. A household appliance (1) for treating laundry, comprising a drum (4) for receiving laundry, mounted to rotate around a horizontal axis (A), and a cross (13) located behind the back when viewed in the direction of the axis (A), a wall (14) of the drum (4) connected to the drum (4) and containing several cantilever beams (15) extending in radial directions, characterized in that between each of the cantilever beams (15) and the rear wall (14) of the drum (4) ) the distance (d) is made in the axial direction so that between the cantilever beams (15) and the rear the wall (14) is formed by a continuous, if we look in the direction of rotation around the axis (A), the gap (16) for leakage, and from the side of the cantilever beams the gap (16) for the leakage is limited by the wall (17) containing the first section (18) of the wall oriented relative to the plane (E) perpendicular to the axis (A), at a first angle (α) of 20 ° to 70 °. 2. A household appliance (1) according to claim 1, characterized in that the first angle (α) is from 30 ° to 55 °. 3. A household appliance (1) according to claim 1 or 2, characterized in that the first wall sections (18) are made on opposite sides of the longitudinal axis (B) of the cantilever beam (15), in particular symmetrically with respect to the longitudinal axis (B) of the cantilever beams (15). 4. A household appliance (1) according to one of the preceding paragraphs, characterized in that the wall (17) comprises a second wall section (19) adjacent to the first wall section (18). 5. A household appliance (1) according to claim 4, characterized in that the second wall section is oriented relative to the plane (E) perpendicular to the axis (A) at a second angle (β) smaller than the angle for the first wall section (18) , and / or is made curved at least in some places. 6. A household appliance (1) according to claim 5, characterized in that the second angle (β) is from 0 ° to 20 °, in particular from 0 ° to 10 °. 7. Household appliance (1) according to one of paragraphs. 4-6, characterized in that the second wall section (19) is located at a greater distance from the longitudinal axis (B) of the cantilever beam (15) than the first wall section (18). 8. Household appliance (1) according to one of paragraphs. 4-7, characterized in that the second wall sections (19) are made on opposite sides from the longitudinal axis (B) of the cantilever beam (15), in particular symmetrically with respect to the longitudinal axis (B) of the cantilever beam (15). 9. A household appliance (I) according to one of the preceding paragraphs, characterized in that the leakage gap (16) is made in at least one portion of the length of the cantilever beam (15) radially external to the axis (A) of the spider (13), immersed into the washing solution in the tank (3) for the washing solution of the household appliance (1) when turning around the axis (A). 10. A household appliance (1) according to one of the preceding paragraphs, characterized in that the wall (17) is made in at least one portion of the length of the cantilever beam (15) radially external to the axis (A) of the spider (13) immersed in the washing the solution in the tank (3) for the washing solution of the household appliance (I) during a revolution around the axis (A). 11. A household appliance (1) according to one of the preceding paragraphs, characterized in that the wall (17) is built into the cantilever beam (15). 12. The household appliance (1) according to one of paragraphs. 1-10, characterized in that at least one wall section (17) is made in the form of a part separate from the spider (13) and covering the cantilever beam (15) in the form of a casing (20) on the side of the cantilever beam (15) opposite clearance (16) for leakage. 13. A household appliance (1) according to claim 12, characterized in that the casing (20) is made in the form of a gutter extending along the length of the covered cantilever beam (15). 14. A household appliance (1) according to claim 12 or 13, characterized in that at least the first portion (18) of the wall (17) is formed in the sidewall (22, 23) of the casing (20). 15. A household appliance (1) according to one of paragraphs. 12-14, characterized in that the casing (20) is made thickened in the direction of rotation around the axis (A) in the portion of the length of the cantilever beam (15) radially external to the axis (A) of the spider (13) immersed in the washing solution in the tank ( 3) for a washing solution of a household appliance (1) when rotating around an axis (A).

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