EP1875846A2 - Nozzle for floor vacuum cleaner - Google Patents

Nozzle for floor vacuum cleaner Download PDF

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Publication number
EP1875846A2
EP1875846A2 EP07004637A EP07004637A EP1875846A2 EP 1875846 A2 EP1875846 A2 EP 1875846A2 EP 07004637 A EP07004637 A EP 07004637A EP 07004637 A EP07004637 A EP 07004637A EP 1875846 A2 EP1875846 A2 EP 1875846A2
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EP
European Patent Office
Prior art keywords
suction
suction head
chassis
nozzle according
horizontal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07004637A
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German (de)
French (fr)
Other versions
EP1875846A3 (en
EP1875846B1 (en
Inventor
Horst Dilger
Dieter Kaffenberger
Thomas Lind
Klaus-Dieter Riehl
Hans-Joachim Steudtner
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Wessel Werk GmbH
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Wessel Werk GmbH
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Publication date
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Publication of EP1875846A2 publication Critical patent/EP1875846A2/en
Publication of EP1875846A3 publication Critical patent/EP1875846A3/en
Application granted granted Critical
Publication of EP1875846B1 publication Critical patent/EP1875846B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/02—Nozzles
    • A47L9/06—Nozzles with fixed, e.g. adjustably fixed brushes or the like
    • A47L9/0666—Nozzles with fixed, e.g. adjustably fixed brushes or the like with tilting, floating or similarly arranged brushes, combs, lips or pads

Definitions

  • the invention relates to a nozzle for a vacuum cleaner with a chassis, which has a rear chassis section with at least one roller and a front projecting in the suction direction front portion for connection of a suction head, with a suction head which is tiltably mounted about a horizontal tilting axis at the front portion of the chassis and at the bottom has a suction mouth bounded by a front suction mouth edge and a rear suction mouth edge and with a SaugrohranQuery Swiss which is pivotable about a horizontal hinge axis in a fixed pivoting range on the chassis, wherein the tilting movement of the suction head about the horizontal tilt axis forward through a first stop position and is limited to the rear by a second stop position of the suction head.
  • Nozzles with the features described above are available in various designs from practice and the document EP 0 353 546 A1 known.
  • the nozzle By means of a suction pipe connected to the suction pipe connecting piece, the nozzle is moved forwards and backwards during suction, wherein due to the double-joint design of the nozzle with the horizontal tilting axis on the one hand and the horizontal hinge axis on the other hand, the suction head is largely decoupled from the pulling and pushing forces exerted via the suction pipe.
  • the obliquely downward sliding force is largely absorbed by the rear chassis section with the at least one roller, wherein the tiltably mounted on the front portion of the chassis suction head slides over the floor to be cleaned.
  • the tilting axis is arranged as low as possible and in particular in the vertical direction below the hinge axis. That in connection with the resistance to movement resulting tilting moment can be kept low, so that the limited of the suction mouth edges Saugmund rests flat on the surface to be cleaned.
  • the first stop position and the second stop position which limit the tilting movement of the suction head about the horizontal tilting axis, are not reached in a normal suction movement, in which the suction mouth rests flat on the surface to be cleaned. Only in extreme suction situations, for example, when crossing edges, the suction head is tilted so much that he can reach the stop positions.
  • the invention has for its object to provide a nozzle for vacuum cleaner with the features described above, which is easy to handle in a forward and backward stroke and has better suction properties.
  • the object is achieved in that the distance between the horizontal tilt axis and the surface formed by the front and rear Saugmundkante is greater than 35 millimeters and that in the first stop position of the suction head relative to the front portion of the chassis by a maximum of 15 ° with respect is tilted to a rest position, wherein lie in the rest position, the front and rear suction mouth edge and the contact point of the roller in a plane. Also, the specified distance for the tilting axis assumes that the suction head is in the rest position, and corresponds to the distance to a flat horizontal, hard floor surface.
  • a defined tilting of the suction head relative to the front portion of the chassis is effected by the large distance between tilting axis and suction mouth in a reciprocating suction movement on a textile floor covering compared with the prior art.
  • the suction head On a return stroke, the suction head reaches the first stop position.
  • the suction head relative to the front portion thereby tilted forward by a maximum of 15 °, preferably by a maximum of 13 °.
  • an obliquely upward force is usually applied to the landing gear, the suction head being held by the suction air flow on the surface to be cleaned.
  • the acute angle, which thereby forms between the suction mouth and the surface to be cleaned is thus smaller than the tilt angle of the suction head relative to the front portion of the chassis and is preferably less than 2 °.
  • the suction head arrives in the second stop position.
  • the second stop position of the suction head relative to the front portion of the chassis is typically set at a maximum of 10 °, preferably at most 7 ° with respect to the rest position obliquely.
  • the roller can be pressed by the obliquely downwardly acting thrust in the forward stroke in the ground, whereby the front portion of the chassis is tilted relative to the ground. According to the tilting of the front section relative to the ground, the angle formed between the suction mouth and the base is reduced in the second stop position of the suction head.
  • the angle relative to the horizontal results essentially from the length of a suction pipe connected to the suction pipe connection piece and the handle height when using the vacuum cleaner with the nozzle according to the invention.
  • a typical pipe length of more as 100 cm and less than 150 cm and a handle height of about 80 cm results in the introduction of force into the nozzle about an angle of 35 °.
  • the suction tube connecting piece arranged on the running gear around the horizontal articulation axis must have a sufficient pivoting range.
  • the interaction of the horizontal articulation axis and the horizontal tilting axis, which according to the invention causes the suction head to tip over during a forward and backward stroke, is decisively determined by the angle of introduction of the force into the nozzle.
  • the total pivoting range is therefore typically limited to a value between 40 ° and 70 °, preferably to a value between 50 ° and 60 °.
  • the horizontal hinge axis in the vertical direction is advantageously arranged below the horizontal tilt axis.
  • the vertical distance between the horizontal hinge axis and the support point of the roller is preferably in a range of 15 mm to 30 mm.
  • the design of the roller is not limited within the scope of the invention. Particularly advantageous, however, is an embodiment in which, in the rest position, the axis of rotation of the roller is arranged in the vertical direction above the horizontal articulation axis and particularly preferably below the horizontal tilting axis.
  • the horizontal distance between the tilt axis and the hinge axis is preferably in a range of 80 mm to 130 mm, particularly preferably in a range of 90 to 110 mm.
  • the vertical portion of the acting thrust force is absorbed by the rearward chassis section with the at least one roller during a forward stroke. Due to the forward movement and the friction of the suction head on the substrate to be cleaned, the suction head reaches the second stop position, whereby the rear suction mouth is raised and the sliding force of the nozzle is significantly reduced.
  • the suction head reaches the second stop position, whereby the rear suction mouth is raised and the sliding force of the nozzle is significantly reduced.
  • the invention teaches in a further embodiment that extends from its center at least partially at an acute angle ⁇ obliquely to the transverse direction of the suction head in the direction of the front edge of the suction head, the front Saugmundkante.
  • the front Saugmundkante can extend starting from its center arrow-shaped in the direction of the front edge of the suction head.
  • the front suction mouth edge has a central portion which extends in the transverse direction, wherein in the direction of the lateral edges of the suction head end portions of the suction mouth adjoin each other at an acute angle ⁇ obliquely to the transverse direction of the suction head in the direction of the front Extend edge of the suction head.
  • the angle ⁇ is within the scope of the described embodiments typically in a range of 1.5 ° and 6 °, preferably in a range between 2 ° and 4 °.
  • the embodiment of the suction mouth is not limited within the scope of the invention.
  • the suction mouth may for example be formed by a single suction channel which is delimited by the front and the rear suction mouth edge.
  • the suction mouth is formed by a front suction channel and a rear suction channel, wherein the front suction channel and the rear suction channel are separated by a web.
  • the web can be provided either in the transverse direction continuously or only laterally of a suction port sections. While the front suction channel preferably extends in the transverse direction over the entire width of the suction head, the rear suction channel typically has a slightly smaller width.
  • the distance between the front suction mouth edge, which limits the front suction channel in the direction of the front edge of the suction head, and the rear suction mouth edge, which limits the rear suction channel in the direction of the rear edge of the suction head comparatively large. Due to the large distance between the front suction mouth edge and the rear suction mouth edge, the suction head has a reduced tilt tendency overall. Surprisingly, however, by the inventive design of the nozzle with the arrangement of the horizontal tilting axis in a height of more than 35 mm, even with a suction head whose suction port is formed by a front and a rear suction, in a forward and backward stroke, the previously described controlled Tilting can be achieved.
  • the distance between the front suction channel and the rear suction channel bridged by the web can change along the course of the suction channels in the transverse direction, wherein the edges of the web can be optimized from a fluidic point of view.
  • FIG. 1a and 1b show a nozzle according to the invention for vacuum cleaner with a chassis 1, which has a rear chassis section 2 with at least one roller 3 and a projecting in the direction of suction front portion 4 for connecting a suction head 5.
  • the suction head 5 is mounted tiltably about a horizontal tilting axis 6 on the front portion 4 of the chassis 1 and has at the bottom of a front suction mouth 7 and a rear suction mouth 7 'limited suction mouth 8.
  • a SaugrohranQuery published 9 of the nozzle is pivotally mounted on the chassis 1 about a horizontal hinge axis 10.
  • the pivoting range ⁇ about the horizontal hinge axis 10 between a minimum and a maximum pivoting angle of the Saugrohran gleich coupless 9 is typically more than 40 ° and less than 70 °, preferably more than 50 ° and less than 60 °.
  • Fig. 1a shows the Saugrohran gleich ma 9 at the maximum tilt angle and Fig. 1b, the Saugrohran gleich Schi 9 at a minimum tilt angle.
  • the suction head 5 is tiltably inserted about the horizontal tilting axis 6 in an associated receptacle 11 of the front portion 4 of the chassis 1, wherein a first stop position and a second stop position, the tilting movement of the suction head. 5 limit, are defined by a first stop 12 and a second stop 12 'of the suction head.
  • the distance h 1 between the horizontal tilting axis 6 and the surface formed by the front and rear suction mouth edges 7, 7 ' is approximately 40 mm in the rest position shown in FIGS. 1a and 1b.
  • the horizontal hinge axis 10 is disposed in the rest position below the horizontal tilt axis 6, wherein the distance h 2 between the horizontal hinge axis 10 and the support point 13 of the roller 3 is about 20 mm.
  • the axis of rotation 14 of the roller 3 is in the rest position about 32 mm above the support point 13 of the roller 3 and thus between the horizontal tilt axis 6 and the horizontal hinge axis 10.
  • the horizontal distance I between tilt axis 6 and hinge axis 10 is about 100 mm.
  • Fig. 2 shows the nozzle according to the invention in a backward stroke.
  • the suction head 5 is tilted relative to the front portion 4 of the chassis by about 13 ° and is in the first stop position. Since on the one hand the suction head 5 is held by the suction air flow on the ground and on the other hand, an obliquely upward pulling force acts on the rear chassis section 2, this is lifted with the roller 3 of the ground to be cleaned, with the front section 4 of the chassis. 1 tilted towards the ground.
  • the suction head 5 is in the first stop position, due to the raised chassis 1 of the suction 8 is almost flat on the surface to be cleaned.
  • the forming between the suction port 8 and the surface to be cleaned angle is preferably less than 2 °.
  • Fig. 3 shows the nozzle in a forward stroke.
  • the suction head 5 is in the second stop position, in which it is tilted with respect to the front portion 4 of the chassis by a maximum of 10 °, preferably by a maximum of 7 °, with respect to the rest position.
  • the rear suction mouth edge 7 ' is lifted off the ground, whereby the pushing force of the only sliding on the front suction mouth edge 7 nozzle is significantly reduced.
  • Particularly advantageous suction properties can be achieved if the region 15 extends obliquely upward in front of the front suction mouth edge 7 and the region 15 'behind the rear suction mouth edge 7' viewed in the longitudinal direction.
  • Fig. 4 shows an advantageous embodiment of the nozzle for vacuum cleaner according to the invention in a view from below.
  • the suction mouth 8 opens centrally in a suction opening 16.
  • a thread lifting strip 17, 17 ' is arranged in front of and behind the suction mouth 8.
  • the front suction mouth edge 7 has a transversely extending middle section 18 in the area of the front thread lifting strip 17.
  • the adjacent to the central portion 18 end portions 19 of the front suction mouth edge 7 each extend at an acute angle ⁇ obliquely to the transverse direction of the suction head 5 in the direction of the front edge 20.
  • the angle ⁇ is typically in a range of 1.5 ° to 6 ° and preferably in a range of 2 ° to 4 °.
  • FIG. 5 shows an alternative embodiment of the nozzle according to the invention in a view from below, wherein the suction mouth of a front suction channel 21a and a rear suction channel 21st b is formed.
  • the front suction mouth edge 7 delimits the front suction channel 21a in the direction of the front edge 20 of the suction head 5 and the rear suction mouth edge 7 'delimits the rear suction mouth channel 21b in the direction of a rear edge 20' of the suction head 5.
  • the front suction channel 21a and the rear suction channel 21b are laterally separated from the suction opening 16 by the portions of a web 22 whose width is corresponding to the shape of the suction channels 21 a, 21 b changes in the transverse direction.
  • the further embodiment of the nozzle shown in Fig. 5 results from the description of Fig. 1a to 4.
  • Fig. 6 shows the nozzle of FIG. 5 in a sectional view corresponding to FIG. 1a in the rest position.
  • the suction mouth 8 with a single suction channel 21 is provided in the embodiment shown in Fig. 6, that in front of the front suction mouth edge 7 and behind the rear suction mouth edge 7 'areas 15, 15' are provided, viewed in the longitudinal direction obliquely run up.
  • the edges of the web can have an aerodynamically optimized shape in cross-section, wherein it should be taken into account that these are typically lifted off the floor covering to be cleaned during a forward or backward stroke as well as one of the two suction mouth edges 7, 7 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Cleaning In General (AREA)
  • Electric Suction Cleaners (AREA)

Abstract

The nozzle has a suction head (5) movably mounted on a front section of a chassis (1) around a horizontal tilting axis (6) in a tiltable manner. A floor surface is formed by front and rear suction mouth edges (7, 7`), where distance between the horizontal tilting axis and the surface, is larger than 35 millimeter. The suction head is tilted in a contact position towards the front section of the chassis at a maximum fifteen degree with respect to a rest position. The front and rear suction mouth edges lie in a plane in the rest position of a contact point (13) of a roller (3).

Description

Die Erfindung betrifft eine Düse für Bodenstaubsauger mit einem Fahrwerk, das einen rückwärtigen Fahrwerkabschnitt mit mindestens einer Laufrolle und einen in Saugrichtung vorkragenden vorderen Abschnitt zum Anschluss eines Saugkopfes aufweist, mit einem Saugkopf, der um eine horizontale Kippachse kippbeweglich an dem vorderen Abschnitt des Fahrwerks gelagert ist und an der Unterseite einen von einer vorderen Saugmundkante und einer hinteren Saugmundkante begrenzten Saugmund aufweist und mit einem Saugrohranschlussstück, welches um eine horizontale Gelenkachse in einem festgelegten Schwenkbereich verschwenkbar an dem Fahrwerk angeordnet ist, wobei die Kippbewegung der Saugkopfes um die horizontale Kippachse nach vorne durch eine erste Anschlagposition und nach hinten durch eine zweite Anschlagposition des Saugkopfes begrenzt ist.The invention relates to a nozzle for a vacuum cleaner with a chassis, which has a rear chassis section with at least one roller and a front projecting in the suction direction front portion for connection of a suction head, with a suction head which is tiltably mounted about a horizontal tilting axis at the front portion of the chassis and at the bottom has a suction mouth bounded by a front suction mouth edge and a rear suction mouth edge and with a Saugrohranschlussstück which is pivotable about a horizontal hinge axis in a fixed pivoting range on the chassis, wherein the tilting movement of the suction head about the horizontal tilt axis forward through a first stop position and is limited to the rear by a second stop position of the suction head.

Düsen mit den eingangs beschriebenen Merkmalen sind in verschiedenen Ausführungen aus der Praxis und der Druckschrift EP 0 353 546 A1 bekannt. Über ein am Saugrohranschlussstück angeschlossenes Saugrohr wird die Düse beim Saugen vorwärts und rückwärts bewegt, wobei aufgrund der doppelgelenkigen Ausführung der Düse mit der horizontalen Kippachse einerseits und der horizontalen Gelenkachse andererseits der Saugkopf weitgehend von den über das Saugrohr ausgeübten Zug- und Schiebekräften entkoppelt ist. So wird bei einer Vorwärtsbewegung der Düse die schräg nach unten wirkende Schiebekraft weitgehend von dem rückwärtigen Fahrwerkabschnitt mit der zumindest einen Laufrolle aufgenommen, wobei der kippbeweglich an dem vorderen Abschnitt des Fahrwerks gelagerte Saugkopf über den zu reinigenden Boden gleitet. Um bei den bekannten Düsen, die einen einzigen Schlitz als Saugmund aufweisen, bei der Saugbewegung ein starkes Verkippen des Saugkopfes zu vermeiden, wird die Kippachse möglichst niedrig und insbesondere in vertikaler Richtung unterhalb der Gelenkachse angeordnet. Das in Verbindung mit dem Bewegungswiderstand entstehende Kippmoment kann dadurch gering gehalten werden, so dass der von den Saugmundkanten begrenzte Saugmund plan auf der zu reinigenden Fläche aufliegt. Die erste Anschlagposition und die zweite Anschlagposition, die die Kippbewegung des Saugkopfes um die horizontale Kippachse begrenzen, werden bei einer normalen Saugbewegung, bei der der Saugmund plan auf der zu reinigenden Oberfläche aufliegt, nicht erreicht. Lediglich bei extremen Saugsituationen, beispielsweise bei dem Überfahren von Kanten, wird der Saugkopf so stark verkippt, dass er die Anschlagpositionen erreichen kann.Nozzles with the features described above are available in various designs from practice and the document EP 0 353 546 A1 known. By means of a suction pipe connected to the suction pipe connecting piece, the nozzle is moved forwards and backwards during suction, wherein due to the double-joint design of the nozzle with the horizontal tilting axis on the one hand and the horizontal hinge axis on the other hand, the suction head is largely decoupled from the pulling and pushing forces exerted via the suction pipe. Thus, with a forward movement of the nozzle, the obliquely downward sliding force is largely absorbed by the rear chassis section with the at least one roller, wherein the tiltably mounted on the front portion of the chassis suction head slides over the floor to be cleaned. In order to avoid a strong tilting of the suction head in the known nozzles, which have a single slot as a suction mouth, the tilting axis is arranged as low as possible and in particular in the vertical direction below the hinge axis. That in connection with the resistance to movement resulting tilting moment can be kept low, so that the limited of the suction mouth edges Saugmund rests flat on the surface to be cleaned. The first stop position and the second stop position, which limit the tilting movement of the suction head about the horizontal tilting axis, are not reached in a normal suction movement, in which the suction mouth rests flat on the surface to be cleaned. Only in extreme suction situations, for example, when crossing edges, the suction head is tilted so much that he can reach the stop positions.

Der Erfindung liegt die Aufgabe zugrunde, eine Düse für Bodenstaubsauger mit den eingangs beschriebenen Merkmalen anzugeben, die bei einem Vorwärts- und Rückwärtshub leicht zu handhaben ist und bessere Saugeigenschaften aufweist.The invention has for its object to provide a nozzle for vacuum cleaner with the features described above, which is easy to handle in a forward and backward stroke and has better suction properties.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass der Abstand zwischen der horizontalen Kippachse und der von der vorderen und der hinteren Saugmundkante gebildeten Fläche größer ist als 35 Millimeter und dass in der ersten Anschlagposition der Saugkopf gegenüber dem vorderen Abschnitt des Fahrwerks um maximal 15° in Bezug auf eine Ruheposition verkippt ist, wobei in der Ruheposition die vordere und die hintere Saugmundkante und der Auflagepunkt der Laufrolle in einer Ebene liegen. Auch der angegebene Abstand für die Kippachse setzt voraus, dass sich der Saugkopf in der Ruheposition befindet, und entspricht dem Abstand zu einer ebenen horizontalen, harten Bodenfläche. Erfindungsgemäß wird durch den im Vergleich zum Stand der Technik großen Abstand zwischen Kippachse und Saugmund bei einer hin- und hergehenden Saugbewegung auf einem textilen Bodenbelag ein definiertes Verkippen des Saugkopfes gegenüber dem vorderen Abschnitt des Fahrwerks bewirkt. Bei einem Rückwärtshub gelangt der Saugkopf in die erste Anschlagposition. In Bezug auf die relative Ausrichtung von Saugkopf und vorderem Abschnitt in der Ruheposition ist der Saugkopf gegenüber dem vorderen Abschnitt dabei um maximal 15°, vorzugsweise um maximal 13°, nach vorne verkippt. Bei dem Rückwärtshub wird auf das Fahrwerk üblicherweise eine schräg nach oben gerichtete Kraft ausgeübt, wobei der Saugkopf durch den Saugluftstrom auf der zu reinigenden Fläche gehalten wird. Durch die entgegenwirkenden Kräfte kann der rückwärtige Fahrwerkabschnitt mit der Laufrolle angehoben und der vordere Abschnitt des Fahrwerks gegenüber der zu reinigenden Fläche verkippt werden. Der spitze Winkel, der sich dabei zwischen dem Saugmund und der zu reinigenden Fläche bildet ist somit kleiner als der Kippwinkel des Saugkopfes gegenüber dem vorderen Abschnitt des Fahrwerks und beträgt vorzugsweise weniger als 2°.The object is achieved in that the distance between the horizontal tilt axis and the surface formed by the front and rear Saugmundkante is greater than 35 millimeters and that in the first stop position of the suction head relative to the front portion of the chassis by a maximum of 15 ° with respect is tilted to a rest position, wherein lie in the rest position, the front and rear suction mouth edge and the contact point of the roller in a plane. Also, the specified distance for the tilting axis assumes that the suction head is in the rest position, and corresponds to the distance to a flat horizontal, hard floor surface. According to the invention, a defined tilting of the suction head relative to the front portion of the chassis is effected by the large distance between tilting axis and suction mouth in a reciprocating suction movement on a textile floor covering compared with the prior art. On a return stroke, the suction head reaches the first stop position. Regarding the relative alignment of suction head and front section in the rest position, the suction head relative to the front portion thereby tilted forward by a maximum of 15 °, preferably by a maximum of 13 °. In the backward stroke, an obliquely upward force is usually applied to the landing gear, the suction head being held by the suction air flow on the surface to be cleaned. By the counteracting forces of the rear chassis section can be raised with the roller and the front portion of the chassis relative to the surface to be cleaned are tilted. The acute angle, which thereby forms between the suction mouth and the surface to be cleaned is thus smaller than the tilt angle of the suction head relative to the front portion of the chassis and is preferably less than 2 °.

Auch bei einem Vorwärtshub wird ein kontrolliertes, genau definiertes Verkippen erzeugt, wobei der Saugkopf in die zweite Anschlagposition gelangt. In der zweiten Anschlagposition ist der Saugkopf gegenüber dem vorderen Abschnitt des Fahrwerks typischerweise um maximal 10°, vorzugsweise maximal 7° in Bezug auf die Ruheposition schräg gestellt. Bei der Reinigung eines weichen Untergrundes, beispielsweise eines hochflorigen Teppichbodens, kann die Laufrolle durch die schräg nach unten wirkende Schubkraft bei dem Vorwärtshub in den Untergrund hineingedrückt werden, wodurch der vordere Abschnitt des Fahrwerks gegenüber dem Untergrund verkippt wird. Entsprechend der Verkippung von vorderem Abschnitt gegenüber dem Untergrund ist der sich zwischen Saugmund und Untergrund bildende Winkel in der zweiten Anschlagposition des Saugkopfes reduziert.Even with a forward stroke, a controlled, well-defined tilting is generated, wherein the suction head arrives in the second stop position. In the second stop position of the suction head relative to the front portion of the chassis is typically set at a maximum of 10 °, preferably at most 7 ° with respect to the rest position obliquely. When cleaning a soft ground, such as a high-pile carpet, the roller can be pressed by the obliquely downwardly acting thrust in the forward stroke in the ground, whereby the front portion of the chassis is tilted relative to the ground. According to the tilting of the front section relative to the ground, the angle formed between the suction mouth and the base is reduced in the second stop position of the suction head.

Der Winkel gegenüber der Horizontalen, in dem die Kraft bei einem Vorwärtshub bzw. bei einem Rückwärtshub auf das Fahrwerk wirkt, ergibt sich im Wesentlichen aus der Länge eines an das Saugrohranschlussstück angeschlossenen Saugrohres und der Griffhöhe bei der Benutzung des Bodenstaubsaugers mit der erfindungsgemäßen Düse. Bei einer typischen Rohrlänge von mehr als 100 cm und weniger als 150 cm sowie einer Griffhöhe von etwa 80 cm ergibt sich für die Krafteinleitung in die Düse etwa ein Winkel von 35°. Um jedoch auch verschiedene Rohrlängen und Griffhöhen sowie eine komfortable Handhabung der Düse in verschiedenen Saugsituationen zu ermöglichen, muss das an dem Fahrwerk um die horizontale Gelenkachse angeordnete Saugrohranschlussstück einen ausreichenden Schwenkbereich aufweisen. Andererseits wird das Zusammenwirken der horizontalen Gelenkachse und der horizontalen Kippachse, welches erfindungsgemäß bei einem Vorwärts- und Rückwärtshub ein Abkippen des Saugkopfes bewirkt, maßgeblich durch den Winkel der Krafteinleitung in die Düse bestimmt. Der gesamte Schwenkbereich ist deshalb typischerweise auf einen Wert zwischen 40° und 70°, vorzugsweise auf einen Wert zwischen 50° und 60° begrenzt.The angle relative to the horizontal, in which the force acts on the landing gear during a forward stroke or during a backward stroke, results essentially from the length of a suction pipe connected to the suction pipe connection piece and the handle height when using the vacuum cleaner with the nozzle according to the invention. For a typical pipe length of more as 100 cm and less than 150 cm and a handle height of about 80 cm results in the introduction of force into the nozzle about an angle of 35 °. However, in order to allow different tube lengths and grip heights as well as comfortable handling of the nozzle in different suction situations, the suction tube connecting piece arranged on the running gear around the horizontal articulation axis must have a sufficient pivoting range. On the other hand, the interaction of the horizontal articulation axis and the horizontal tilting axis, which according to the invention causes the suction head to tip over during a forward and backward stroke, is decisively determined by the angle of introduction of the force into the nozzle. The total pivoting range is therefore typically limited to a value between 40 ° and 70 °, preferably to a value between 50 ° and 60 °.

Für die Funktion der erfindungsgemäßen Düse ist neben der Höhe der horizontalen Kippachse und der Ausgestaltung der ersten und der zweiten Anschlagposition auch die weitere geometrische Ausgestaltung ausschlaggebend. Um bei einer Hubbewegung stets ein Verkippen des Saugkopfes bis zu einer der Anschlagpositionen zu gewährleisten, ist die horizontale Gelenkachse in vertikaler Richtung zweckmäßigerweise unterhalb der horizontalen Kippachse angeordnet. Der vertikale Abstand zwischen der horizontalen Gelenkachse und dem Auflagepunkt der Laufrolle liegt dabei vorzugsweise in einem Bereich von 15 mm bis 30 mm. Die Ausgestaltung der Laufrolle ist im Rahmen der Erfindung nicht eingeschränkt. Besonders vorteilhaft ist jedoch eine Ausgestaltung, bei der in der Ruheposition die Drehachse der Laufrolle in vertikaler Richtung oberhalb der horizontalen Gelenkachse und besonders bevorzugt unterhalb der horizontalen Kippachse angeordnet ist. Der horizontale Abstand zwischen der Kippachse und der Gelenkachse liegt vorzugsweise in einem Bereich von 80 mm bis 130 mm, besonders bevorzugt in einem Bereich von 90 bis 110 mm.For the function of the nozzle according to the invention in addition to the height of the horizontal tilt axis and the configuration of the first and the second stop position and the further geometric design is crucial. To always ensure a tilting of the suction head to one of the stop positions during a lifting movement, the horizontal hinge axis in the vertical direction is advantageously arranged below the horizontal tilt axis. The vertical distance between the horizontal hinge axis and the support point of the roller is preferably in a range of 15 mm to 30 mm. The design of the roller is not limited within the scope of the invention. Particularly advantageous, however, is an embodiment in which, in the rest position, the axis of rotation of the roller is arranged in the vertical direction above the horizontal articulation axis and particularly preferably below the horizontal tilting axis. The horizontal distance between the tilt axis and the hinge axis is preferably in a range of 80 mm to 130 mm, particularly preferably in a range of 90 to 110 mm.

Erfindungsgemäß wird bei einem Vorwärtshub der vertikale Anteil der wirkenden Schubkraft von dem rückwärtigen Fahrwerksabschnitt mit der zumindest einen Laufrolle aufgenommen. Aufgrund der Vorwärtsbewegung und der Reibung des Saugkopfes auf dem zu reinigenden Untergrund gelangt der Saugkopf in die zweite Anschlagsposition, wodurch die hintere Saugmundkante angehoben und die Schiebekraft der Düse deutlich reduziert wird. Insbesondere auf unebenen Untergründen oder auf bestimmten Teppichböden kann dabei ein unerwünschtes Hin- und Herklappen des Saugkopfes auftreten, welches auch als Rubbeln bezeichnet wird. Zur Verringerung der Rubbelneigung lehrt die Erfindung in einer weiteren Ausgestaltung, dass sich die vordere Saugmundkante ausgehend von ihrer Mitte zumindest abschnittsweise in einem spitzen Winkel α schräg zu der Querrichtung des Saugkopfes in Richtung des vorderen Randes des Saugkopfes erstreckt. Die äußeren Enden der vorderen Saugmundkante liegen somit dichter an dem vorderen Rand des Saugkopfes, wodurch überraschenderweise bereits bei kleinen Winkeln α eine deutliche Verringerung der Rubbelneigung erreicht wird. Im Rahmen dieser Ausgestaltung kann sich die vordere Saugmundkante ausgehend von ihrer Mitte pfeilförmig in Richtung des vorderen Randes des Saugkopfes erstrecken. Vorzugsweise ist jedoch vorgesehen, dass die vordere Saugmundkante einen Mittelabschnitt aufweist, der sich in Querrichtung erstreckt, wobei in Richtung der seitlichen Ränder des Saugkopfes Endabschnitte der Saugmundkante anschließen, die sich jeweils in einem spitzen Winkel α schräg zu der Querrichtung des Saugkopfes in Richtung des vorderen Randes des Saugkopfes erstrecken. Der Winkel α liegt im Rahmen der beschriebenen Ausgestaltungen typischerweise in einem Bereich von 1,5° und 6°, vorzugsweise in einem Bereich zwischen 2° und 4°.According to the invention, the vertical portion of the acting thrust force is absorbed by the rearward chassis section with the at least one roller during a forward stroke. Due to the forward movement and the friction of the suction head on the substrate to be cleaned, the suction head reaches the second stop position, whereby the rear suction mouth is raised and the sliding force of the nozzle is significantly reduced. In particular, on uneven surfaces or on certain carpets can cause an undesirable Hin and Herklappen the suction head occur, which is also referred to as rubbing. To reduce the rubbing tendency, the invention teaches in a further embodiment that extends from its center at least partially at an acute angle α obliquely to the transverse direction of the suction head in the direction of the front edge of the suction head, the front Saugmundkante. The outer ends of the front suction mouth edge are thus closer to the front edge of the suction head, which surprisingly, even at small angles α a significant reduction in the rubbing tendency is achieved. In the context of this embodiment, the front Saugmundkante can extend starting from its center arrow-shaped in the direction of the front edge of the suction head. Preferably, however, it is provided that the front suction mouth edge has a central portion which extends in the transverse direction, wherein in the direction of the lateral edges of the suction head end portions of the suction mouth adjoin each other at an acute angle α obliquely to the transverse direction of the suction head in the direction of the front Extend edge of the suction head. The angle α is within the scope of the described embodiments typically in a range of 1.5 ° and 6 °, preferably in a range between 2 ° and 4 °.

Die Ausgestaltung des Saugmundes ist im Rahmen der Erfindung nicht eingeschränkt. Der Saugmund kann beispielsweise von einem einzigen Saugkanal gebildet sein, der von der vorderen und der hinteren Saugmundkante begrenzt ist. Im Rahmen der Erfindung liegt jedoch auch, dass der Saugmund von einem vorderen Saugkanal und einem hinteren Saugkanal gebildet ist, wobei der vordere Saugkanal und der hintere Saugkanal von einem Steg getrennt sind. Der Steg kann entweder in Querrichtung durchgehend oder lediglich seitlich einer Saugöffnung abschnittsweise vorgesehen sein. Während sich der vordere Saugkanal bevorzugt in Querrichtung über die gesamte Breite des Saugkopfes erstreckt, weist der hintere Saugkanal typischerweise eine etwas geringere Breite auf. Auch konstruktionsbedingt ist der Abstand zwischen der vorderen Saugmundkante, die den vorderen Saugkanal in Richtung des vorderen Randes des Saugkopfes begrenzt, und der hinteren Saugmundkante, die den hinteren Saugkanal in Richtung des hinteren Randes des Saugkopfes begrenzt, vergleichsweise groß. Aufgrund des großen Abstandes zwischen der vorderen Saugmundkante und der hinteren Saugmundkante weist der Saugkopf insgesamt eine reduzierte Kippneigung auf. Überraschenderweise kann jedoch durch die erfindungsgemäße Ausgestaltung der Düse mit der Anordnung der horizontalen Kippachse in einer Höhe von mehr als 35 mm auch bei einem Saugkopf, dessen Saugmund von einem vorderen und einem hinteren Saugkanal gebildet ist, bei einem Vorwärts- und Rückwärtshub das zuvor beschriebene kontrollierte Verkippen erreicht werden. Der von dem Steg überbrückte Abstand zwischen dem vorderen Saugkanal und dem hinteren Saugkanal kann sich entlang des Verlaufes der Saugkanäle in Querrichtung verändern, wobei die Kanten des Steges aus strömungstechnischer Sicht optimiert sein können.The embodiment of the suction mouth is not limited within the scope of the invention. The suction mouth may for example be formed by a single suction channel which is delimited by the front and the rear suction mouth edge. In the context of the invention, however, is also that the suction mouth is formed by a front suction channel and a rear suction channel, wherein the front suction channel and the rear suction channel are separated by a web. The web can be provided either in the transverse direction continuously or only laterally of a suction port sections. While the front suction channel preferably extends in the transverse direction over the entire width of the suction head, the rear suction channel typically has a slightly smaller width. Also by design, the distance between the front suction mouth edge, which limits the front suction channel in the direction of the front edge of the suction head, and the rear suction mouth edge, which limits the rear suction channel in the direction of the rear edge of the suction head, comparatively large. Due to the large distance between the front suction mouth edge and the rear suction mouth edge, the suction head has a reduced tilt tendency overall. Surprisingly, however, by the inventive design of the nozzle with the arrangement of the horizontal tilting axis in a height of more than 35 mm, even with a suction head whose suction port is formed by a front and a rear suction, in a forward and backward stroke, the previously described controlled Tilting can be achieved. The distance between the front suction channel and the rear suction channel bridged by the web can change along the course of the suction channels in the transverse direction, wherein the edges of the web can be optimized from a fluidic point of view.

Die Erfindung wird im Folgenden anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert. Es zeigen schematisch:

Fig. 1a und 1b
die erfindungsgemäße Düse in der Ruheposition bei unterschiedlicher Stellung des Saugrohranschlussstückes,
Fig. 2
die erfindungsgemäße Düse bei einem Rückwärtshub,
Fig. 3
die erfindungsgemäße Düse bei einem Vorwärtshub,
Fig. 4
eine vorteilhafte Ausgestaltung der Düse in einer Ansicht von unten,
Fig. 5
eine alternative Ausgestaltung der Düse in einer Ansicht von unten,
Fig. 6
die Düse gemäß Fig. 5 in einer Schnittdarstellung entsprechend der Fig. 1a.
The invention will be explained in the following with reference to a drawing showing only one exemplary embodiment. They show schematically:
Fig. 1a and 1b
the nozzle according to the invention in the rest position with different position of the Saugrohranschlussstückes,
Fig. 2
the nozzle according to the invention in a backward stroke,
Fig. 3
the nozzle according to the invention in a forward stroke,
Fig. 4
an advantageous embodiment of the nozzle in a view from below,
Fig. 5
an alternative embodiment of the nozzle in a view from below,
Fig. 6
the nozzle of FIG. 5 in a sectional view corresponding to FIG. 1a.

Fig. 1a und 1b zeigen eine erfindungsgemäße Düse für Bodenstaubsauger mit einem Fahrwerk 1, das einen rückwärtigen Fahrwerkabschnitt 2 mit mindestens einer Laufrolle 3 und einen in Saugrichtung vorkragenden vorderen Abschnitt 4 zum Anschluss eines Saugkopfes 5 aufweist. Der Saugkopf 5 ist um eine horizontale Kippachse 6 kippbeweglich an dem vorderen Abschnitt 4 des Fahrwerks 1 gelagert und weist an der Unterseite einen von einer vorderen Saugmundkante 7 und einer hinteren Saugmundkante 7' begrenzten Saugmund 8 auf. Ein Saugrohranschlussstück 9 der Düse ist an dem Fahrwerk 1 um eine horizontale Gelenkachse 10 schwenkbar angeordnet. Der Schwenkbereich β um die horizontale Gelenkachse 10 zwischen einem minimalen und einem maximalen Schwenkwinkel des Saugrohranschlussstücks 9 beträgt typischerweise mehr als 40° und weniger als 70°, vorzugsweise mehr als 50° und weniger als 60°. Fig. 1a zeigt das Saugrohranschlussstück 9 bei dem maximalen Schwenkwinkel und die Fig. 1b das Saugrohranschlussstück 9 bei einem minimalen Schwenkwinkel. Der Saugkopf 5 ist um die horizontale Kippachse 6 kippbeweglich in eine zugeordnete Aufnahme 11 des vorderen Abschnittes 4 des Fahrwerks 1 eingesetzt, wobei eine erste Anschlagposition und eine zweite Anschlagposition, die die Kippbewegung des Saugkopfes 5 begrenzen, durch eine ersten Anschlag 12 bzw. einen zweiten Anschlag 12' des Saugkopfes definiert sind. Der Abstand h1 zwischen der horizontalen Kippachse 6 und der von der vorderen und der hinteren Saugmundkante 7, 7' gebildeten Fläche beträgt in der in den Figuren 1a und 1 b dargestellten Ruheposition etwa 40 mm. Die horizontale Gelenkachse 10 ist in der Ruheposition unterhalb der horizontalen Kippachse 6 angeordnet, wobei der Abstand h2 zwischen der horizontalen Gelenkachse 10 und dem Auflagepunkt 13 der Laufrolle 3 etwa 20 mm beträgt. Die Drehachse 14 der Laufrolle 3 liegt in der Ruheposition etwa 32 mm über dem Auflagepunkt 13 der Laufrolle 3 und somit zwischen der horizontalen Kippachse 6 und der horizontalen Gelenkachse 10. Der horizontale Abstand I zwischen Kippachse 6 und Gelenkachse 10 beträgt etwa 100 mm.1a and 1b show a nozzle according to the invention for vacuum cleaner with a chassis 1, which has a rear chassis section 2 with at least one roller 3 and a projecting in the direction of suction front portion 4 for connecting a suction head 5. The suction head 5 is mounted tiltably about a horizontal tilting axis 6 on the front portion 4 of the chassis 1 and has at the bottom of a front suction mouth 7 and a rear suction mouth 7 'limited suction mouth 8. A Saugrohranschlussstück 9 of the nozzle is pivotally mounted on the chassis 1 about a horizontal hinge axis 10. The pivoting range β about the horizontal hinge axis 10 between a minimum and a maximum pivoting angle of the Saugrohranschlussstücks 9 is typically more than 40 ° and less than 70 °, preferably more than 50 ° and less than 60 °. Fig. 1a shows the Saugrohranschlussstück 9 at the maximum tilt angle and Fig. 1b, the Saugrohranschlussstück 9 at a minimum tilt angle. The suction head 5 is tiltably inserted about the horizontal tilting axis 6 in an associated receptacle 11 of the front portion 4 of the chassis 1, wherein a first stop position and a second stop position, the tilting movement of the suction head. 5 limit, are defined by a first stop 12 and a second stop 12 'of the suction head. The distance h 1 between the horizontal tilting axis 6 and the surface formed by the front and rear suction mouth edges 7, 7 'is approximately 40 mm in the rest position shown in FIGS. 1a and 1b. The horizontal hinge axis 10 is disposed in the rest position below the horizontal tilt axis 6, wherein the distance h 2 between the horizontal hinge axis 10 and the support point 13 of the roller 3 is about 20 mm. The axis of rotation 14 of the roller 3 is in the rest position about 32 mm above the support point 13 of the roller 3 and thus between the horizontal tilt axis 6 and the horizontal hinge axis 10. The horizontal distance I between tilt axis 6 and hinge axis 10 is about 100 mm.

Fig. 2 zeigt die erfindungsgemäße Düse bei einem Rückwärtshub. Im Vergleich zu der in Fig. 1a und 1b dargestellten Ruheposition ist der Saugkopf 5 gegenüber dem vorderen Abschnitt 4 des Fahrwerk um etwa 13° verkippt und befindet sich in der ersten Anschlagposition. Da einerseits der Saugkopf 5 durch den Saugluftstrom auf dem Boden gehalten wird und andererseits eine schräg nach oben gerichtete Zugkraft auf den rückwärtigen Fahrwerkabschnitt 2 wirkt, ist dieser mit der Laufrolle 3 von dem zu reinigenden Boden abgehoben, wobei auch der vordere Abschnitt 4 des Fahrwerks 1 gegenüber dem Boden verkippt ist. Obwohl sich der Saugkopf 5 in der ersten Anschlagposition befindet, liegt aufgrund des angehobenen Fahrwerks 1 der Saugmund 8 nahezu plan auf der zu reinigenden Fläche auf. Der sich zwischen dem Saugmund 8 und der zu reinigenden Fläche bildende Winkel beträgt dabei vorzugsweise weniger als 2°.Fig. 2 shows the nozzle according to the invention in a backward stroke. Compared to the rest position shown in Fig. 1a and 1b, the suction head 5 is tilted relative to the front portion 4 of the chassis by about 13 ° and is in the first stop position. Since on the one hand the suction head 5 is held by the suction air flow on the ground and on the other hand, an obliquely upward pulling force acts on the rear chassis section 2, this is lifted with the roller 3 of the ground to be cleaned, with the front section 4 of the chassis. 1 tilted towards the ground. Although the suction head 5 is in the first stop position, due to the raised chassis 1 of the suction 8 is almost flat on the surface to be cleaned. The forming between the suction port 8 and the surface to be cleaned angle is preferably less than 2 °.

Fig. 3 zeigt die Düse bei einem Vorwärtshub. Der Saugkopf 5 befindet sich in der zweiten Anschlagposition, in der er gegenüber dem vorderen Abschnitt 4 des Fahrwerks um maximal 10°, vorzugsweise um maximal 7°, in Bezug auf die Ruheposition verkippt ist. Die hintere Saugmundkante 7' ist von dem Boden abgehoben, wodurch die Schiebekraft der lediglich auf der vorderen Saugmundkante 7 gleitenden Düse deutlich reduziert ist. Besonders vorteilhafte Saugeigenschaften können erreicht werden, wenn der Bereich 15 vor der vorderen Saugmundkante 7 und der Bereich 15' hinter der hinteren Saugmundkante 7' in Längsrichtung gesehen schräg nach oben verlaufen.Fig. 3 shows the nozzle in a forward stroke. The suction head 5 is in the second stop position, in which it is tilted with respect to the front portion 4 of the chassis by a maximum of 10 °, preferably by a maximum of 7 °, with respect to the rest position. The rear suction mouth edge 7 'is lifted off the ground, whereby the pushing force of the only sliding on the front suction mouth edge 7 nozzle is significantly reduced. Particularly advantageous suction properties can be achieved if the region 15 extends obliquely upward in front of the front suction mouth edge 7 and the region 15 'behind the rear suction mouth edge 7' viewed in the longitudinal direction.

Fig. 4 zeigt eine vorteilhafte Ausgestaltung der erfindungsgemäßen Düse für Bodenstaubsauger in einer Ansicht von unten. Der Saugmund 8 mündet mittig in einer Saugöffnung 16. Im Bereich der Saugöffnung 16 ist vor und hinter dem Saugmund 8 jeweils ein Fadenheberstreifen 17, 17' angeordnet. Die vordere Saugmundkante 7 weist im Bereich des vorderen Fadenheberstreifens 17 einen in Querrichtung verlaufenden Mittelabschnitt 18 auf. Die an den Mittelabschnitt 18 angrenzenden Endabschnitte 19 der vorderen Saugmundkante 7 erstrecken sich jeweils in einem spitzen Winkel α schräg zu der Querrichtung des Saugkopfes 5 in Richtung des vorderen Randes 20. Bereits durch eine leicht schräge Ausgestaltung der vorderen Saugmundkante 7 kann die Rubbelneigung der Düse auf bestimmten Teppichböden deutlich reduziert werden. Der Winkel α liegt typischerweise in einem Bereich von 1,5° bis 6° und vorzugsweise in einem Bereich von 2° bis 4°.Fig. 4 shows an advantageous embodiment of the nozzle for vacuum cleaner according to the invention in a view from below. The suction mouth 8 opens centrally in a suction opening 16. In the region of the suction opening 16, a thread lifting strip 17, 17 'is arranged in front of and behind the suction mouth 8. The front suction mouth edge 7 has a transversely extending middle section 18 in the area of the front thread lifting strip 17. The adjacent to the central portion 18 end portions 19 of the front suction mouth edge 7 each extend at an acute angle α obliquely to the transverse direction of the suction head 5 in the direction of the front edge 20. Already by a slightly oblique configuration of the front Saugmundkante 7, the scratching tendency of the nozzle certain carpets are significantly reduced. The angle α is typically in a range of 1.5 ° to 6 ° and preferably in a range of 2 ° to 4 °.

Während in Fig. 1a bis Fig. 4 der Saugmund 8 von einem einzigen Saugkanal 21 gebildet ist, zeigt die Fig. 5 eine alternative Ausgestaltung der erfindungsgemäßen Düse in einer Ansicht von unten, wobei der Saugmund von einem vorderen Saugkanal 21a und einem hinteren Saugkanal 21 b gebildet ist. Die vordere Saugmundkante 7 begrenzt den vorderen Saugkanal 21a in Richtung des vorderen Randes 20 des Saugkopfes 5 und die hintere Saugmundkante 7' begrenzt den hinteren Saugmundkanal 21 b in Richtung eines hinteren Randes 20' des Saugkopfes 5. Der vordere Saugkanal 21a und der hintere Saugkanal 21b sind seitlich der Saugöffnung 16 durch die Abschnitte eines Steges 22 getrennt, dessen Breite sich entsprechend der Ausformung der Saugkanäle 21 a, 21 b in Querrichtung ändert. Die weitere Ausgestaltung der in Fig. 5 dargestellten Düse ergibt sich aus der Beschreibung zu Fig. 1a bis 4.While in Fig. 1a to Fig. 4, the suction mouth 8 is formed by a single suction channel 21, Fig. 5 shows an alternative embodiment of the nozzle according to the invention in a view from below, wherein the suction mouth of a front suction channel 21a and a rear suction channel 21st b is formed. The front suction mouth edge 7 delimits the front suction channel 21a in the direction of the front edge 20 of the suction head 5 and the rear suction mouth edge 7 'delimits the rear suction mouth channel 21b in the direction of a rear edge 20' of the suction head 5. The front suction channel 21a and the rear suction channel 21b are laterally separated from the suction opening 16 by the portions of a web 22 whose width is corresponding to the shape of the suction channels 21 a, 21 b changes in the transverse direction. The further embodiment of the nozzle shown in Fig. 5 results from the description of Fig. 1a to 4.

Fig. 6 zeigt die Düse gemäß Fig. 5 in einer Schnittdarstellung entsprechend der Fig. 1a in der Ruheposition. Wie bei der Ausgestaltung des Saugmundes 8 mit einem einzigen Saugkanal 21 ist bei der in Fig. 6 dargestellten Ausgestaltung vorgesehen, dass vor der vorderen Saugmundkante 7 und hinter der hinteren Saugmundkante 7' Bereiche 15, 15' vorgesehen sind, die in Längsrichtung gesehen schräg nach oben verlaufen. Die Kanten des Steges können im Querschnitt eine strömungstechnisch optimierte Form aufweisen, wobei zu berücksichtigen ist, dass diese bei einem Vorwärts- oder Rückwärtshub wie auch jeweils eine der beiden Saugmundkanten 7, 7' typischerweise von dem zu reinigenden Bodenbelag abgehoben sind.Fig. 6 shows the nozzle of FIG. 5 in a sectional view corresponding to FIG. 1a in the rest position. As in the embodiment of the suction mouth 8 with a single suction channel 21 is provided in the embodiment shown in Fig. 6, that in front of the front suction mouth edge 7 and behind the rear suction mouth edge 7 'areas 15, 15' are provided, viewed in the longitudinal direction obliquely run up. The edges of the web can have an aerodynamically optimized shape in cross-section, wherein it should be taken into account that these are typically lifted off the floor covering to be cleaned during a forward or backward stroke as well as one of the two suction mouth edges 7, 7 '.

Claims (11)

Düse für Bodenstaubsauger mit - einem Fahrwerk (1), das einen rückwärtigen Fahrwerkabschnitt (2) mit mindestens einer Laufrolle (3) und einen in Saugrichtung vorkragenden vorderen Abschnitt (4) zum Anschluss eines Saugkopfes (5) aufweist, - einem Saugkopf (5), der um eine horizontale Kippachse (6) kippbeweglich an dem vorderen Abschnitt (4) des Fahrwerks (1) gelagert ist und an der Unterseite einen von einer vorderen Saugmundkante (7) und einer hinteren Saugmundkante (7') begrenzten Saugmund (8) aufweist und - einem Saugrohranschlussstück (9), welches um eine horizontale Gelenkachse (10) in einem festgelegten Schwenkbereich verschwenkbar an dem Fahrwerk (1) angeordnet ist, wobei die Kippbewegung der Saugkopfes (5) um die horizontale Kippachse (6) nach vorne durch eine erste Anschlagposition und nach hinten durch eine zweite Anschlagposition des Saugkopfes (5) begrenzt ist, dadurch gekennzeichnet, dass der Abstand (h1) zwischen der horizontalen Kippachse (6) und der von der vorderen und der hinteren Saugmundkante (7, 7') gebildeten Fläche größer ist als 35 Millimeter und dass in der ersten Anschlagposition der Saugkopf (5) gegenüber dem vorderen Abschnitt (4) des Fahrwerks (1) um maximal 15° in Bezug auf eine Ruheposition verkippt ist,
wobei in der Ruheposition der Auflagepunkt (13) der Laufrolle (3) die vordere und die hintere Saugmundkante (7, 7') in einer Ebene liegen.Nozzle for vacuum cleaner with a chassis (1) having a rear chassis section (2) with at least one roller (3) and a front section (4) projecting in the suction direction for connecting a suction head (5), - A suction head (5) which is tiltably mounted about a horizontal tilting axis (6) on the front portion (4) of the chassis (1) and at the bottom of a front Saugmundkante (7) and a rear Saugmundkante (7 ') has limited suction mouth (8) and a suction pipe connection piece (9) which is arranged pivotably about a horizontal joint axis (10) in a fixed pivoting area on the chassis (1), wherein the tilting movement of the suction head (5) about the horizontal tilting axis (6) to the front by a first stop position and to the rear by a second stop position of the suction head (5) is limited, characterized in that the distance (h 1 ) between the horizontal tilt axis (6) and the surface formed by the front and rear suction mouth (7, 7 ') is greater than 35 millimeters and that in the first stop position of the suction head (5) relative to the front portion (4) of the chassis (1) by a maximum 15 ° tilted with respect to a rest position,
wherein in the rest position of the support point (13) of the roller (3), the front and the rear suction mouth edge (7, 7 ') lie in a plane. Düse nach Anspruch 1, dadurch gekennzeichnet, dass in der zweiten Anschlagposition der Saugkopf (5) gegenüber dem vorderen Abschnitt (4) des Fahrwerks (1) um maximal 10° in Bezug auf die Ruheposition verkippt ist.Nozzle according to claim 1, characterized in that in the second stop position, the suction head (5) is tilted with respect to the front portion (4) of the chassis (1) by a maximum of 10 ° with respect to the rest position. Düse nach Anspruch 1 und 2, dadurch gekennzeichnet, dass der Saugkopf (5) gegenüber dem vorderen Abschnitt (4) des Fahrwerks (1) in der ersten Anschlagposition um maximal 13° und in der zweiten Anschlagposition um maximal 7° in Bezug auf die Ruheposition schräg gestellt ist.Nozzle according to claim 1 and 2, characterized in that the suction head (5) relative to the front portion (4) of the chassis (1) in the first stop position by a maximum of 13 ° and in the second stop position by a maximum of 7 ° with respect to the rest position is tilted. Düse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der festgelegte Schwenkbereich, in dem das Saugrohranschlussstück (9) um die horizontale Gelenkasche (10) gegenüber dem Fahrwerk (1) verschwenkbar ist, zwischen 40° und 70°, vorzugsweise zwischen 50° und 60°, beträgt.Nozzle according to one of claims 1 to 3, characterized in that the fixed pivoting range, in which the Saugrohranschlussstück (9) about the horizontal hinge pocket (10) relative to the chassis (1) is pivotable, between 40 ° and 70 °, preferably between 50 ° and 60 °. Düse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der vertikale Abstand (h2) zwischen der horizontalen Gelenkachse (10) und dem Auflagepunkt (13) der Laufrolle (3) in einem Bereich von 15 mm bis 30 mm liegt.Nozzle according to one of claims 1 to 4, characterized in that the vertical distance (h 2 ) between the horizontal hinge axis (10) and the support point (13) of the roller (3) is in a range of 15 mm to 30 mm. Düse nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der horizontale Abstand (I) zwischen der Kippachse (6) und der Gelenkachse (10) in einem Bereich von 80 mm bis 130 mm, vorzugsweise 90 mm bis 110 mm, liegt.Nozzle according to one of claims 1 to 5, characterized in that the horizontal distance (I) between the tilting axis (6) and the hinge axis (10) in a range of 80 mm to 130 mm, preferably 90 mm to 110 mm. Düse nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sich die vordere Saugmundkante (7) ausgehend von ihrer Mitte zumindest abschnittsweise in einem spitzen Winkel α schräg zu der Querrichtung des Saugkopfes (5) in Richtung des vorderen Randes (20) des Saugkopfes (5) erstreckt.Nozzle according to one of claims 1 to 6, characterized in that the front suction mouth edge (7) starting from its center at least in sections at an acute angle α obliquely to the transverse direction of the suction head (5) in the direction of the front edge (20) of the suction head (5) extends. Düse nach Anspruch 7, dadurch gekennzeichnet, dass die vordere Saugmundkante (7) einen Mittelabschnitt (18) aufweist, der sich in Querrichtung erstreckt, wobei in Richtung der seitlichen Ränder der Saugkopfes Endabschnitte (19) der vorderen Saugmundkante (7) anschließen, die sich jeweils in einem spitzen Winkel α schräg zu der Querrichtung des Saugkopfes (5) in Richtung des vorderen Randes (20) des Saugkopfes erstrecken.Nozzle according to claim 7, characterized in that the front suction mouth (7) has a central portion (18) extending transversely, end portions (19) of the front suction mouth (7) joining in the direction of the lateral edges of the suction head each extend at an acute angle α obliquely to the transverse direction of the suction head (5) in the direction of the front edge (20) of the suction head. Düse nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Winkel α in einem Bereich zwischen 1,5° und 6°, vorzugsweise in einem Bereich zwischen 2° und 4°, liegt.Nozzle according to claim 7 or 8, characterized in that the angle α is in a range between 1.5 ° and 6 °, preferably in a range between 2 ° and 4 °. Düse nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Saugmund (8) von einem einzigen Saugkanal (21) gebildet ist.Nozzle according to one of claims 1 to 9, characterized in that the suction mouth (8) is formed by a single suction channel (21). Düse nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Saugmund (8) von einem vorderen Saugkanal (21a) und einem hinteren Saugkanal (21 b) gebildet ist, wobei der vordere Saugkanal (21 a) und der hintere Saugkanal (21 b) zumindest seitlich einer Saugöffnung (16) durch einen Steg (22) getrennt sind.Nozzle according to one of claims 1 to 9, characterized in that the suction mouth (8) of a front suction channel (21 a) and a rear suction channel (21 b) is formed, wherein the front suction channel (21 a) and the rear suction channel (21 b) are separated at least laterally of a suction opening (16) by a web (22).
EP20070004637 2006-07-07 2007-03-07 Nozzle for floor vacuum cleaner Active EP1875846B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610031486 DE102006031486A1 (en) 2006-07-07 2006-07-07 Nozzle for vacuum cleaner

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EP1875846A2 true EP1875846A2 (en) 2008-01-09
EP1875846A3 EP1875846A3 (en) 2008-06-04
EP1875846B1 EP1875846B1 (en) 2010-05-12

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WO2011007158A1 (en) * 2009-07-16 2011-01-20 Dyson Technology Limited A surface treating head
EP2092869A3 (en) * 2008-02-23 2011-05-04 Wessel-Werk GmbH Nozzle for floor vacuum cleaner
EP2433539A1 (en) * 2010-09-24 2012-03-28 Seb S.A. Balancing pad for a vacuum cleaner nozzle
EP2449936A1 (en) * 2010-11-05 2012-05-09 Seb S.A. Vacuum cleaner nozzle with rotatably limited base plate
US8387207B2 (en) 2009-07-16 2013-03-05 Dyson Technology Limited Surface treating head
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EP2910168A1 (en) * 2014-02-20 2015-08-26 Hoover Limited Vacuum cleaner head
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EP2092869A3 (en) * 2008-02-23 2011-05-04 Wessel-Werk GmbH Nozzle for floor vacuum cleaner
CN102006810B (en) * 2008-04-17 2014-11-19 伊莱克斯公司 Vacuum cleaner nozzle
WO2009128763A1 (en) * 2008-04-17 2009-10-22 Aktiebolaget Electrolux Vacuum cleaner nozzle
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WO2015039706A1 (en) * 2013-09-23 2015-03-26 Alfred Kärcher Gmbh & Co. Kg Suction nozzle apparatus for a cleaning device, and cleaning device
EP2910168B1 (en) 2014-02-20 2016-06-01 Hoover Limited Vacuum cleaner head
EP2910168A1 (en) * 2014-02-20 2015-08-26 Hoover Limited Vacuum cleaner head
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EP4226827A1 (en) * 2022-02-14 2023-08-16 Wessel-Werk GmbH Vacuum cleaner nozzle
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Also Published As

Publication number Publication date
EP1875846A3 (en) 2008-06-04
CN101099648A (en) 2008-01-09
DE502007003695D1 (en) 2010-06-24
EP1875846B1 (en) 2010-05-12
CN101099648B (en) 2013-05-01
DE102006031486A1 (en) 2008-01-10

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