ES2534788T3 - Drum for a washing machine - Google Patents

Abstract

Drum for a washing machine, in which on the drum cover (1) there are disposers (2) that penetrate inside the drum and in which the drum cover (1) is provided with grooves (4), joined by recesses (6) covered by the entrainers (2) for the passage through washing / rinsing liquid, the grooves (4) being found exclusively in the area of the entrainers (2), characterized in that a receiving section (5) of the grooves (4) is located outside the area covered by the drag (2) in the edge area (K) between drag (2) and drum (1).

Description

E12401172

04-10-2015

DRUM FOR A WASHING MACHINE

DESCRIPTION

The invention relates to a drum for a washing machine, in which on the drum cover there are arranged projectors that protrude inside the drum and in which the drum cover is provided with grooves, joined by recesses covered by the draggers. for passage through washing / rinsing liquid (see document EP-A-0 245 721).

From the state of the art it is known according to DE 199 52 990 A1 a drum with grooves that go around the entire drum cover. In the area below the draggers are arranged in the grooved holes, through which washing liquid can pass through

or rinsing liquid. A drawback in this drum is that a large part of the interior of the surface of the drum cover is crossed by grooves and the laundry becomes in contact with these grooves. Due to the contact an unwanted mechanical effect takes place on the laundry through the grooves, subjecting it to strong solicitations and causing damage.

EP 2 022 882 A2 also describes a drum in which both the drive and the drum cover have interacting recesses, which allow dirt to be removed from the inside of the drum to the outside of the drum. However, it is a drawback that not only the drum cover has to be provided with a recess, but also the drag. Therefore a lot of work is needed to generate this evacuation of dirt.

EP 024 57 21 A1 describes the possibility of letting dirt particles reach through small perforation holes to the wall of the drive to the inside of the drive. Of course, the dirt particles can also come out of the same way again from the trawler when they have somehow previously come into small holes. The laundry becomes fully in contact with the holes.

The invention thus has as a basic task to perfect a drum for a washing machine such that the aforementioned drawbacks are overcome.

In the context of the invention, this task is solved by means of a drum for a washing machine with the characteristics of claim 1. Advantageous improved configurations and improvements of the invention result from the following subordinate claims.

The advantages that can be achieved with the invention consist on the one hand, because the grooves are in the drum cover exclusively in the area of the draggers, in which the machining of the draggers is obsolete and in this way the amount is reduced of stages of work for manufacturing.

On the other hand, a minor mechanical action is exerted on the laundry, because the grooves are exclusively in the area of the draggers and do not completely surround the drum cover. The laundry has less contact surface with the grooves and in this way it is better cared for.

In the area of the draggers are the grooves practically in a hollow formed by the draggers and the adjacent drum cover. For the evacuation of dirt, this position of the groove can easily and easily reach the water in which the dirt is found, because water is a liquid.

On the contrary, for casting it is difficult to reach this position of the groove in the hollow described, because the laundry has a greater rigidity than water and is more difficult to deform. The laundry does not follow the hollow section completely.

In addition, a receiver section of the grooves outside the area covered by the drive in the area of the edge between the drive and the cover of the drum is arranged within the framework of the invention, whereby further optimization of said function of filter. The edge area between the drag and the drum cover constitutes the bottom of the groove. Here dirt accumulates due to gravity and centrifugal forces and is practically driven to the groove.

But it is again difficult for laundry to reach the edge area at the bottom of the groove described. The laundry is already supported on the wall of the draggers and on the wall of the drum that borders the draggers. To the area of the edge between drag and cover of the drum as soon as the laundry arrives. The mechanical action on the laundry is therefore mainly based on the wall of the conveyor and the wall of the drum that borders the draggers. Another additional advantage of this is that the groove is not covered by the casting in the area of the edge between the conveyor and the drum cover and thus the evacuation of the dirt is favored.

2

E12401172

04-10-2015

When the housing segment 1 that is outside the area covered by the carrier has a length of 1 mm to 2 mm or 2 mm to 3 mm or 3 mm to 4 mm or 4 mm to 5 mm or 5 mm to 6 mm or 6 mm to 7 mm or 7 mm to 8 mm or 8 mm to 9 mm or 9 mm to 10 mm, then the groove has a relatively small opening towards the drum area corresponding to the laundry. Because of this, the laundry has only a small contact surface with the groove and the aforementioned advantages can be achieved without problems.

When the grooves additionally have an evacuation section, one of the recesses between the receiving section and the evacuation section being arranged in each case, then the evacuation section can support the evacuation of the dirt coming from the receiving section by evacuating it from inside the drum outside the drum through the recess. In other words, the receiving section before the recess and the recess before the evacuation section is therefore in the direction of the evacuation of the dirt.

When the receiving section of the grooves is bulged outwardly from inside the drum, the bottom level of the groove is located in the receiving area of the groove lower than the drum wall itself. As a result, dirt is therefore captured and conducted as a channel.

When the evacuation section is domed towards the inside of the drum, then the level of the bottom of the groove is found in the evacuation section of the groove higher than the drum wall itself. Therefore the bulging of the groove in the receiving section is directed in the opposite direction to the bulging of the groove in the evacuation section. As a result, the evacuation section thus supports the flow of dirt coming from the receiving section through the recess towards the outside of the drum.

An exemplary embodiment of the invention is schematically depicted in the drawings and will now be described by way of example. It shows in

Figure 1 shows a perspective view of a drive on the drum cover Figure 2 shows a perspective view of a groove configuration and Figure 3 a section through a drive and the drum cover in the area of a configuration

of grooving.

Figure 1 shows a perspective view of a drag 2 on the drum cover 1. The drag 2 is interlocked by notches 3 with the drum cover 1. Under the drag 2, groove configurations 4 are arranged alternately in the right areas e left of the creeper 2.

Each groove configuration 4 has respective receiving sections 5 stamped, recesses 6 stamped and evacuation sections 7 stamped. The receiving section 5 extends in the area of the edge K between drag 2 and drum cover 1 several millimeters in the area not covered by the drag 2, where it can accommodate dirt.

On its other side, the receiving section 5 flows into the recess 6. Behind the recess 6 follows the evacuation section 7, which has a bulge oriented in the opposite direction to that of the receiving section 5 and which supports the conduction of the dirt flow to the recess 6.

Figure 2 shows a perspective view of a groove configuration 4. The groove configuration 4 has, as described, a receiving section 5 and an evacuation section 7, with a recess 6 interspersed between them. The bulging of the receiving section 5 is directed in the opposite direction to the bulging of the evacuation section 7.

Figure 3 shows a section through a drag 2 and the drum cover 1 in the area of a groove configuration 4. The bulging of the receiving section 5 is directed in the opposite direction to the bulging of the evacuation section 7. Between them is arranged the recess 6, which is completely under the covered area and protected by the drag 2.

Only one end zone of the receiving section 5 extends outside the area covered by the drag 2 to accommodate the dirt S. The remaining, larger part of the receiving section 5, the recess 6 and the evacuation section 7 are arranged in the area covered by the drag 2, where they cannot touch the laundry.

The dirt S is collected by the receiving section 5 outside the conveyor 2, driven under the conveyor along the arrow A and evacuated through the evacuation section 7 with the corresponding support out of the recess 6 to the outside of the drum .

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Claims (4)

1. Drum for a washing machine, in which the drum cover (1) is arranged draggers (2) that penetrate inside the drum and in which the drum cover 5 (1) is provided with grooves (4), joined by recesses (6) covered by the draggers (2) for the passage through the washing / rinsing liquid, the grooves (4) being exclusively in the area of the draggers (2), characterized in that a receiving section (5) of the grooves (4) is outside of the area covered by the drag (2) in the edge area (K) between drag (2) and drum (1). 10

2.

Drum according to claim 1, characterized in that the receiving section (5) outside the area covered by the carrier (2) has a length of 1 mm to 2 mm or 2 mm to 3 mm or 3 mm to 4 mm or 4 mm to 5 mm or 5 mm to 6 mm or 6 mm to 7 mm or 7mm to 8 mm or 8 mm to 9 mm or 9 mm to 10 mm.

3.

Drum according to claim 1 or 2, characterized in that the grooves (4) additionally have an evacuation section (7), in each case one of the recesses (6) being arranged between the receiving section (5) and the evacuation section ( 7).

fifteen twenty 4. Drum according to one of claims 1 to 3, characterized in that the receiving section (5) of the grooves (4) is bulged outwardly from inside the drum. 5. Drum according to claim 3 or 4, characterized in that the evacuation segment (7) is bulged into the drum. 4