WO2006021486A1

WO2006021486A1 - Vacuum cleaner with a dust chamber seal

Info

Publication number: WO2006021486A1
Application number: PCT/EP2005/053795
Authority: WO
Inventors: Roland Illig; Thomas Seith
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2004-08-24
Filing date: 2005-08-03
Publication date: 2006-03-02
Also published as: ES2481398T3; EP1784103A1; EP1784103B1; DE102004040980A1

Abstract

The invention relates to a vacuum cleaner comprising a housing consisting of a lower part with a dust collector chamber, which can be closed by means of a dust chamber cover, arranged therein. The lid can be moved from an open position, enabling a dust collector device to be removed and inserted, to a closed position wherein a wall section of the vacuum cleaner is disposed in a sealingly adjacent position along a sealing edge. In order to create a separating joint seal between a lower part of the vacuum cleaner and the cover of the dust chamber, which has a constant sealing effect even when the underpressure conditions inside the dust chamber are modified, the sealing edge is disposed adjacent to a wall section extending substantially in the direction of movement of the cover of the dust chamber when the dust chamber cover is placed in a closed position.

Description

Vacuum cleaner with a dust chamber seal

The invention relates to a vacuum cleaner with a separating joint seal according to the preamble of claim 1.

From DE 44 21 214 A1 discloses a vacuum cleaner with a dust chamber seal is known in which the sealing lip between the dust collecting space and the associated lid part protrudes out of the dust collection space in a gap and on the inner edge of the dust collecting space outside the opposite edge sealing surfaces of the lower part and the associated lid part on Sealing foot is attached. This parting seal is intended to compensate for vertical housing movements and to compensate for unavoidable gap tolerances between the opposing housing edges. The disadvantage here, however, is that the sealing effect of the gap width between the housing and lid edge is dependent. Depending on the current height of the negative pressure applied in the dust chamber, the lid is pressed more or less against the housing, so that sets an ever-changing gap width. Despite the special design of the sealing lip no constant sealing effect is achieved due to the ever changing gap width.

The object of the invention is to provide a separating joint seal between a lower part of a vacuum cleaner and a dust chamber cover, which has a constant sealing effect even with changing vacuum conditions in the dust chamber.

This object is achieved in that the sealing edge in the closed position of the dust chamber cover rests against a substantially extending in the direction of movement of the dust chamber cover wall portion. If the sealing edge of the separating joint seal rests against a substantially extending in the direction of movement of the dust chamber cover wall portion, the distance between the wall portion and the sealing edge remains at least approximately constant, even if the dust chamber cover depending on prevailing negative pressure in the dust chamber different positions to the housing or the lower part of the vacuum cleaner occupies. Despite such movements of the dust chamber cover, the wall portion always moves approximately at a fixed distance to the separating joint seal. In a preferred embodiment of the invention, the sealing edge is provided on the lower part of a separating joint seal, which is formed as a projecting towards a wall portion of the dust chamber lid elastic lip. By the separating joint seal is provided on the lower part and the sealing edge is formed as an elastic projecting lip, a particularly good sealing effect is ensured, since the separating joint seal is fixed to the lower part of the vacuum cleaner with respect to the dust chamber cover more stable, whereby a high dimensional stability of the parting joint is achieved, on the other the projecting elastic lip causes high elasticity and softness to reliably seal a parting line between the lower housing part and the dust chamber cover.

The elastic lip is preferably designed projecting in the direction of a dust chamber facing the wall portion of the dust chamber lid. If the elastic lip, in the direction of a dust wall facing the dust chamber wall portion of the dust chamber lid protruding lip also formed obliquely outward, the sealing effect increases with increasing negative pressure in the dust chamber. In this case, the elastic sealing lip on the parting joint already be obliquely formed running outward. Alternatively, it would be sufficient if, for example, the sealing edge is mounted or formed in the unloaded state perpendicular to the wall portion of the dust chamber cover on the parting joint seal. In this embodiment, the wall portion of the dust chamber cover when moving the dust chamber cover in the closed position, the vertically projecting lip in the direction of movement so bend outwards, so that an analogous to the first variants salaried positioning of the lip is realized. Also in this embodiment of the elastic lip, the sealing effect increases with increase in the negative pressure in the dust chamber.

In an advantageous embodiment, the elastic lip on a free end that is employed against the direction of movement of the dust chamber cover. The salaried training of the free end of the elastic lip not only an increased sealing effect is achieved with increase in negative pressure in the dust chamber, but even with slight movement of the dust chamber cover against the closing direction is in a mechanical way spreading the free end of the sealing lip against the wall portion of the dust chamber cover achieved, so that the sealing effect at a slight opening movement of the dust chamber lid initially increases. Dust chamber covers are generally held in their closed position by means of a mechanical locking mechanism. In most cases, the locking mechanism is a latching counter-latching connection. In such locking mechanisms, it is usually necessary to move the dust chamber cover over the holding position with the dust chamber lid closed in the closing direction, so that the locking means can lock with the counter-locking means. Subsequently, the dust chamber lid will relax slightly in the opening direction or open until latching and counter-locking means abut each other. With the elastic lip according to the invention, this effect is used to mechanically spread the free end of the elastic lip by a slight movement of the wall portion of the dust chamber cover in the opening direction and to increase the sealing effect.

In a preferred embodiment of the invention, the elastic lip protrudes into a provided on the lower part, upwardly open channel into which the wall portion of the dust chamber lid dips in its closed position. By entering the free end of the elastic lip in the open channel, the free end of the lip is mechanically protected, so that when the dust chamber cover is opened accidental contact and mechanical damage to the sensitive elastic lip is reliably prevented. As an additional effect, an additional labyrinth seal is realized between the groove and the dust chamber lid edge in the closed position of the dust chamber cover, which additionally increases the sealing effect.

Preferably, the channel is formed in cross-section U-shaped with an outer and an inner wall of the dust collecting space circumferential leg wall, on whose one leg wall, the separating joint seal is attached. By fastening the separating joint seal on a leg wall of the cross-sectionally U-shaped channel, the separating joint seal is dimensionally stable following the U-shaped cross section of the channel, so that the elastic lip of the parting joint with respect. The U-shaped cross section of the channel is accurately positioned and aligned , Minor deviations of the separating joint seal can be eliminated or at least largely compensated with the attachment of the separating joint seal on a leg wall of the channel. As a result, the reliability and sealing effect of the separating joint seal is increased. - A -

The separating joint seal can be fastened in particular by fastening means on the leg wall. In an advantageous embodiment, the fastening means of interlocking, formed by attaching the parting seal on the leg wall latching locking and counter-locking means. Due to the interlocking locking and counter-locking means, the separating joint seal can be mounted in the correct position without additional fastening means in the correct position. Furthermore, if appropriate, a separating joint seal mounted in this way can also be easily detached again.

Preferably locking projections are provided as locking means, which are formed on the leg wall. The latching projections engage in counter-locking means of the separating joint seal. In this case, the counter-locking means are designed as latching recesses. Through this

Design with locking projections and recesses is a simple and correct position mounting the parting seal allows on the leg wall.

Preferably, the latching projections and latching recesses are arranged non-symmetrically, so that the separating joint seal only in a permissible position on the

Leg wall can be mounted.

Preferably, the parting seal is attached to an inner leg wall of the dust collection chamber. By attaching the separating joint seal on an inner leg wall, it is possible in a particularly simple manner, the elastic protruding lip projecting outwardly projecting into the U-shaped groove. In particular, the separating joint seal is kept hidden when the dust chamber cover is closed so that the separating joint seal is not visible to the user when the dust compartment cover is in operation.

The separating joint seal can be provided with spacers for a stackable storage multiple Trennfugendichtungen. The spacers are intended to prevent too close superimposition of the form-fitting Trennfugendichtungen so that an at least slight gap between each two stacked Trennfugendichtungen remains, so that in the course of installation of the vacuum cleaner, a single joint sealing can be taken in a simple manner from the stack. By the spacers according to the invention for the parting joint is In particular, it prevents accidentally several Trennfugendichtungen are taken during assembly simultaneously from the stack.

An embodiment of a vacuum cleaner according to the invention with a separating joint seal is explained in more detail in Figures 1 to 4.

Show it:

Figure 1 shows a partial cross section through a vacuum cleaner according to the invention with slightly open dust chamber cover;

FIG. 2 shows a partial cross section through the vacuum cleaner from FIG. 1 with the dust chamber cover completely closed;

Figure 3 is a perspective view of a partial section of a separating seal according to the invention, as used in Figures 1 and 2;

Figure 4 shows a section through the separating joint seal of Figure 3 in the amount of a recess.

The vacuum cleaner according to FIG. 1 has a housing 1 with a lower part 2. The lower part 2 has a flat bottom portion and adjoining upwardly leading side walls, which form an upwardly open shell. On the bottom surface 3 of the lower part 2, a pivot pin 4 of a pivotable roller, not shown, is formed. To stiffen the lower part 2 5 stiffening ribs 6 are formed on the inside of the side walls, which extend to the bottom surface 3 of the lower part. The side walls 5 of the lower part 2 define a dust chamber 7 by a dust collecting device such as. A dust filter bag or a Staubabscheidebox can be used. In a front region of the lower part 2, a pivot axis 8 is formed for a pivotable dust chamber cover 9. At a side opposite the pivot axis 8 side of the dust chamber 7, a fan chamber 10 is provided in the lower part 2. In the dust chamber 7 from the fan chamber 10 separating side wall 5, an intake port 1 1 is provided. About the suction port 1 1 sucks an unillustrated engine blower Aggregate, which is arranged in the fan room 10, air from the dust chamber 7 at. The sucked air enters via a nozzle 12, which is provided on the dust chamber cover 9, in the dust chamber 7 a. At the nozzle 12, a suction hose, not shown, is connected. In Figure 1, the dust chamber cover is shown in a slightly open position. In this case, the dust chamber cover 9 is rotatably mounted about the pivot axis 8. At upper free ends of the side walls 5 of the lower part 2 a cross-sectionally approximately U-shaped groove is formed. The cross-sectionally approximately U-shaped channel 13 has an inner leg wall 14 and an outer leg wall 15. The outer leg wall 15 is formed in the embodiment as an extension of the side wall 5. At the inwardly projecting inner leg wall 14 sits on a separating joint seal 16. The parting joint 16 is in turn approximately U-shaped in cross section and is placed from above on the free edge of the inner leg wall 14. For attachment of the separating joint seal 16 on the inner leg wall 14 locking hooks 17 are integrally formed on the inner leg wall 14, which engage in recesses 18 of the separating joint 16. At the parting joint 16, a lip 19 is formed, the free end hineinerstreckt into the cavity of the channel 13. The lip 19 is oriented in its relaxed position approximately at 45 ° to the direction of movement of a wall portion 20 of the dust chamber cover 9. The wall portion 20 of the dust chamber cover 9 is formed circumferentially around the dust chamber 7 and extends along the contour of the separating joint seal 16. The circumferential free edge of the wall portion 20 presses when closing the dust chamber cover 9 on the lip 19 of the separating joint 16, which also revolves around the dust chamber 7 is trained. In the not yet closed position of the dust chamber cover 9 in Figure 1, the free edge of the wall portion 20 is just above the circumferential lip 19th

Figure 2 shows the lower part 2 and the dust chamber cover 9 in a closed position according to operation. In the closed position of the dust chamber cover 9, the free ends of the lip 19 from the inside to the sides of the wall portion 20 sealingly. The peripheral edge 21 of the wall portion 20 dives completely into the groove 13 on the side walls 5 of the lower part 2 a. Between the inner leg wall 14 and the outer leg wall 15 of the channel 13 and the side walls of the peripheral edge 21 of the wall portion 20, an additional labyrinth seal is provided. However, the actual sealing gap is between the outside of the inner Leg wall 14 and the inside of the wall portion 20 along the peripheral edge 21 is formed. This circumferential gap has an approximately constant gap width regardless of whether the dust chamber cover 9 is slightly more or less closed. That is, the gap width is largely independent of the immersion depth of the peripheral edge 21 of the wall portion 20 in the groove 13 of the lower part 2. The lip 19 is located on the inside of the wall portion 20 with its free end bent outwards. The lip 19 is aligned so that upon an opening movement of the dust chamber cover 9 of the adjacent wall portion 20, the lip 19 spreads.

Figure 3 shows a partial view of the inventive jointing gasket 16. At the parting joint 16 integrally the circumferential lip 19 is formed. Furthermore, locking recesses 18 are introduced, in which engage the latching hooks 17 of the lower part 2 in the mounted state. At the bottom of the separating joint 16, a plurality of spacers 22 are arranged distributed.

FIG. 4 shows, on an enlarged scale, a cross section through the separating joint seal 16 from FIG. 3. The section through the separating joint seal 16 extends in the region of a latching recess 18. For a simple assembly of the separating joint seal 16 onto the free edge of the inner leg wall 14 of the channel 13 on the side walls 5 of the lower part 2 16 two circumferential phases 23 are provided at the lower ends of the separating joint seal. In a transition region between the lip 19 and the separating joint seal 16, a constriction 24 is provided as material weakening to increase the elasticity of the lip 19. The seal quality can be adjusted by appropriate lip hardness, lip length and lip thickness. The elasticity of the lip 19 is adjusted substantially by the strength of the constriction 24 with respect to the other lip thickness. Due to the inventive lip 19, the lip 19 is pulled back to its original relaxed position when opening the dust chamber cover 9 due to the frictional force between the cantilevered end of the lip 19 and the wall portion 20 of the dust chamber cover 9. Thus, in a subsequent closing of the dust chamber cover 9 again the entire travel of the lip 19 is available.

Claims

claims

1 . Vacuum cleaner having a housing (1) which has a lower part (2) in which a dust collecting space is arranged, which can be closed by a dust chamber cover (9), which can be brought from an open position for removal and insertion of a dust collecting device into a closed position, in the one

Wall section (20) of the vacuum cleaner sealingly abuts a sealing edge of a separating joint seal (16), characterized in that the sealing edge in the closed position of the dust chamber cover (9) on a substantially in the direction of movement of the dust chamber cover (9) extending wall portion (20).

2. Vacuum cleaner according to claim 1, characterized in that the sealing edge is part of a at the lower part (2) provided separating joint seal (16) and as in the direction of a wall portion (20) of the dust chamber cover (9) projecting elastic lip (19) is formed ,

3. Vacuum cleaner according to claim 2, characterized in that the elastic lip (19) in the direction of a dust chamber (7) facing wall portion (20) of the dust chamber cover (9) is formed protruding.

4. Vacuum cleaner according to claim 2 or 3, characterized in that the elastic lip (19) has a free end, which is employed against the direction of movement of the dust chamber cover (9).

5. Vacuum cleaner according to one of claims 2 to 4, characterized in that the elastic lip (19) in a provided on the lower part (2), upwardly open groove (13) protrudes into which the wall portion (20) of the dust chamber cover ( 9) immersed in its closed position.

6. Vacuum cleaner according to claim 5, characterized in that the channel (13) is formed in cross section U-shaped with an outer and an inner dust collecting space surrounding leg wall, on whose one leg wall, the separating joint seal (16) is attached.

7. Vacuum cleaner according to claim 6, characterized in that the separating joint seal (16) is fastened by fastening means on the leg wall.

8. Vacuum cleaner according to claim 7, characterized in that the fastening means of interlocking, by attaching the

Dividing joint seal (16) on the leg wall latching latching and counter-locking means is formed.

9. Vacuum cleaner according to claim 8, characterized in that the latching means are formed on the leg wall latching projections which in Gegenrastmittel of

Separating joint seal (16) engage, which are formed as latching recesses (18).

10. Vacuum cleaner according to one of claims 6 to 9, characterized in that the separating joint seal (16) on the inner leg wall (14) is fixed.

1 1. Vacuum cleaner according to one of the preceding claims, characterized in that the separating joint seal (16) is provided with spacers (22) for a stackable mounting of a plurality of separating-joint seals (16).