EP2241237A2 - Suction header, vacuum cleaner and method for driving same - Google Patents

Abstract

Disclosed is a suction attachment (12) for a vacuum cleaner (10), wherein the suction attachment (12) comprises at least one rotatable bristle roller (14) and wherein the suction attachment (12) is movable with a rotatable travel drive (16) based on a sensed thrust force, a vacuum cleaner (10) with such a suction attachment (12) and with at least one processing unit (70) for controlling the motor (40) and a method for driving such a suction attachment (12).

Description

description

Suction attachment, vacuum cleaner and method of driving

The invention relates to a vacuum cleaner for a vacuum cleaner according to the preamble of claim 1. The invention further relates to a vacuum cleaner with such a suction attachment and a method for driving such a suction attachment.

Suction attachments for vacuum cleaners, especially vacuum cleaners, are well known. Such Saugvorsätze are often referred to as a floor nozzle and can be a rotating bristle roller, as in DE 689 05 252 T2 or the DE 103 57 497 A1 described include. Such bristle rollers are driven electrically or by suction turbine.

Suction attachments modern vacuum cleaner are designed for optimal dust absorption, so that due to a high suction capacity of the vacuum cleaner, especially on carpets or carpets, a comparatively large force (pushing force) is required for the movement of the suction attachment. Such sliding forces arise because the suction attachment is strongly pressed against the carpet due to the negative pressure generated by the vacuum cleaner. The force required for the movement of the suction attachment is dependent on the suction power of the cleaner, the nature of the substrate, the suction attachment or the like. When the suction attachment comprises a driven bristle roller for processing the substrate to be cleaned, movement of the suction attachment in an opposite direction to the direction of the brush roller rotation requires additional force.

If a reduction of the required force - pushing force - is to be carried out with suction attachments, this is usually done at the expense of a dust absorption capacity through targeted leaks in the system.

The invention is therefore an object of the invention to provide a suction with very good dust holding capacity and low, required sliding forces.

This object is achieved according to the invention with the features of claim 1. The suction attachment for a vacuum cleaner comprises at least one rotatable bristle roller. In addition, the suction attachment comprises an electric motor drive with at least one rotatable drive drive and a motor, wherein the suction attachment is movable based on a sensed thrust. Such a suction attachment thus assists a user by reducing the thrust force to be expended by the user, namely by having the travel drive operative to move the suction attachment in the direction predetermined by the user. The The thrust force expended by the user is then reduced by the contribution due to the travel drive. This reduction can go so far that a nearly powerless movement of the suction attachment, especially on carpet or carpets, is possible. This is also the case when the suction attachment is provided and designed for optimum dust absorption.

A user can advantageously maintain his work habits, since the suction attachment based on the sensed thrust force is movable and thus an adjustment of the travel drive to a user-desired feed rate, feed direction or the like is ensured.

The object is further achieved with a vacuum cleaner as previously and described below. In this case, the vacuum cleaner comprises at least one processing unit for controlling the motor of the traction drive based on the sensed thrust. If the vacuum cleaner comprises the processing unit, the vacuum cleaner attachment is particularly inexpensive to produce and easy to replace.

Furthermore, the object is achieved by a method for driving a suction attachment as described above and in the following. For this purpose, it is provided that a difference of a sensed thrust force and a Saugvorsatz thrust of the electric motor driven Saugvorsatzes is determined and the difference is adjusted by changing drive parameters, in particular the direction of rotation and / or rotational speed of the electric motor drive to a predetermined or predetermined value. It is thus detected a user desired movement and / or speed and implemented by the suction intent in an actual movement and / or speed. As a result, an expended on a very good suction suction device reduces a user expended thrust and increases user comfort.

Advantageous embodiments of the invention are the subject of the dependent claims. This used backlinks point to the further development of the subject matter of the main claim by the features of the respective subclaim; they should not be construed as a waiver of obtaining independent, objective protection for the feature combinations of the dependent claims. Furthermore, with a view to an interpretation of the claims in a closer specification of a feature in a subordinate claim, it is to be assumed that such a restriction does not exist in the respective preceding claims.

In a preferred embodiment of the suction attachment, the latter comprises at least as a sensor for the thrust force a sensor by means of which a change in position of displaceable parts of the suction attachment and / or a vacuum cleaner tube can be determined. Alternatively, the sensor may be comprised of a vacuum cleaner tube, so that by means of the Sensors a change in position of movable parts of the vacuum cleaner attachment, vacuum cleaner tube and / or vacuum cleaner can be determined. Additionally or alternatively, the sensor for detecting a change in position of the vacuum cleaner attachment and / or vacuum cleaner tube may be provided and formed in space. The sensor outputs a signal correlated with a user-initiated force. In operation, this is received and processed by a processing unit which controls or regulates the electromotive drive on the basis of the signal.

The sensor is arranged for example in the region of a pivot point of a Saugrohrstutzens the Saugvorsatzes and detects directly or indirectly forces between the suction attachment and the suction tube, z. B. the sensor can be arranged on a bracket of the pivot point or the Saugrohrstutzens. Alternatively, the sensor can be arranged in or on a handle, in particular handle of the vacuum cleaner tube. Then the sensor detects forces acting on the handle or a change of position of the handle in space. So z. B. pressed in a forward stroke of the handle relative to a rest position down or pulled in the return stroke of the handle relative to the rest position up. The rest position can also be a previous position.

As preferred embodiments of the sensor, a switch, a strain gauge, piezoelectric element, pressure-sensitive resistor, capacitive or inductive sensor, Hall sensor or magnetoresistive sensor and the like come into consideration. If the sensor is a switch, then results in dependence on a feed by the user, ie z. For example, when the operator pushes the suction attachment forward or pulls back, an actuation of the switch. In addition or alternatively, the switch can be provided and designed for actuation by the user.

Is the sensor a magnetic field sensor, z. As a Hall sensor or magnetoresistive sensor, it results in a force application, a change in a sensed by the sensor magnetic field, for example, when a ferromagnetic material or a magnet is moved relative to the actual sensor.

If the sensor is a coil, a varying inductance can be sensed directly or indirectly by moving a ferromagnetic material or magnet relative to the coil so as to induce an evaluable voltage, change a resonant frequency of the coil, or the like. Particularly suitable for this purpose is a differential transformer.

In a preferred embodiment, a feed rate of the suction intent is predetermined or predetermined. At a predetermined feed rate this z. B. 0.5 m / s. However, other suitable feed rates are possible. Alternatively, a fine-step or continuous adjustment of the feed rate to a desired feed rate possible. In this case, the feed rate of the suction attachment can be adapted to the sensed thrust.

In a preferred embodiment, the engine and the drive are directly coupled. In addition, the suction attachment may comprise an electrical circuit for reversing the direction of rotation of the motor. Alternatively, the engine and the travel drive can be coupled indirectly, for example by means of a transmission and / or a belt connection. In this case, the direction of rotation of the traction drive can be effected by means of an intervention in the transmission.

The motor is preferably a brushless motor, so that for the Saugvorsatz overall associated with brushless motors benefits, namely long life of the engine and low maintenance due to the absence of brushes, regardless of the load almost constant speed, high speed capability and give a short-term overloadability. The fact that three conductors are required to supply such brushless motors, also proves to be an advantage with respect to the occasionally required direction reversal, because in such a so-called three-phase drive is known to switch two phases sufficient for a reversal of direction.

In a preferred embodiment, the suction attachment comprises as drive at least one roller, a crawler, at least two wheels or the like. With at least two wheels, at least one of the wheels can be driven by means of the electromotive drive. The or each wheel can be designed so that a good grip on different surfaces, especially different types of carpets or carpets, guaranteed. For example, the or each wheel may have a rough tread. In addition or alternatively, at least the running surface may comprise a material which has particularly good adhesive properties on the substrate.

In a further preferred embodiment, the suction attachment comprises a bristle roller drive for rotating the bristle rollers in a direction opposite to the direction of rotation of the travel drive. This requires a particularly efficient cleaning, since, when the bristle roller rotates counter to the direction of movement of the suction attachment, a "higher mechanics" in the substrate, especially the flooring, is introduced. As a result, a lot of dust and dirt are dissolved and stirred up, thus improving the dust absorption. Particularly preferably, the direction of rotation of the bristle roller is reversible depending on the direction of rotation of the traction drive. In this case, the travel drive compensates for a movement of the suction attachment generated by the bristle roller completely or partially, so that a high level of user comfort is ensured.

In a further preferred embodiment, the motor is provided for driving both the bristle roller and the traction drive. This results in a cost reduction, since a single motor drives both parts, as well as a reduction in weight and a reduction of a construction volume of the suction attachment. In addition, since the rotations of the bristle roller and the rotation of the traction drive are coupled, a "mechanics" introduced per area and time is independent of a working speed of a user. This results in a guarantee of constant cleaning results, regardless of the feed rate; a user who moves the suction attachment quickly achieves the same cleaning performance as a user who moves the suction attachment more slowly. In addition, the substrate, in particular flooring, spared because the bristle roller in the case of a stoppage of the traction drive also stops.

An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.

The or each embodiment is not to be understood as limiting the invention. Rather, numerous modifications and variations are possible within the scope of the present disclosure, in particular those variants, elements and combinations and / or materials which may be described, for example, by combination or modification of particulars described in the general or specific description and in the claims and / or features contained in the drawing or elements or method steps for a person skilled in the art with regard to the solution of the task can be removed and lead by combinable features to a new subject or to new process steps or procedural steps.

Figur 1

einen Staubsauger mit einer Ausführungsform eines erfindungsgemäßen Saugvorsatzes in Seitenansicht,

Figur 2

eine Ausführungsform eines erfindungsgemäßen Saugvorsatzes im Querschnitt,

Figur 3

eine alternative Ausführungsform eines erfindungsgemäßen Saugvorsatzes im Querschnitt,

Figur 4

einen Sensor in einem Staubsauger-Handgriff im Querschnitt,

Figur 5

eine Ausführungsform des Sensors aus Figur 4 dargestellt in einer Draufsicht,

Figur 6

eine weitere Ausführungsform eines Sensors in einem Staubsauger-Handgriff im Querschnitt,

Figur 7

einen Sensor in einem Ansaugstutzen im Querschnitt,

Figur 8

eine alternative Ausführungsform eines Sensors an einem Ansaugstutzen im Querschnitt,

Figur 9

eine Ausführungsform eines geeigneten Ansaugstutzens im Querschnitt,

Figur 10

eine Ausführungsform eines geeigneten Anbringteils für einen Sensor im Querschnitt und

Figur 11

ein Blockdiagramm zur Veranschaulichung des Wirkzusammenhangs bei der erfindungsgemäßen Ansteuerung des Saugvorsatzes.

• Figur 1 zeigt eine schematisch vereinfachte Darstellung eines Staubsaugers 10 mit einer Ausführungsform eines erfindungsgemäßen Saugvorsatzes 12 in Seitenansicht. Der Saugvorsatz 12 umfasst eine Borstenwalze 14 sowie einen drehbaren Fahrantrieb 16 und ist mittels eines Ansaugstutzens 18 mit einem Staubsaugerrohr 20 des Staubsaugers 10 gekoppelt. Das Staubsaugerrohr 20 umfasst an einem oberen Ende 22 einen Handgriff 24. Der Staubsaugerschlauch 26 ist wiederum mit einem Basisgerät 28 verbunden. Die Kombination aus Ansaugstutzen 18, Staubsaugerrohr 20, Handgriff 24 und Staubsaugerschlauch 26 schafft einen nicht dargestellten Luftpfad vom Saugvorsatz 12 zum Basisgerät 28.
• Figur 2 zeigt eine schematisch vereinfachte Darstellung einer Ausführungsform eines erfindungsgemäßen Saugvorsatzes 12 im Querschnitt, welcher im Wesentlichen dem in Figur 1 Gezeigten entspricht. Die Borstenwalze 14 ist mittels eines Borstenwalzen-Antriebs antreibbar. Diese umfasst einen ersten Motor 32 und einen ersten Riemenantrieb 34 für die Borstenwalze 14. Als zur Bewegung des Saugvorsatzes 12 wirksamer Teil des Fahrantriebs 16 ist ein profiliertes Rad gezeigt. Dieses ist über einen zweiten Riemenantrieb 38 und einen zweiten Motor 40 antreibbar. In Betrieb des Saugvorsatzes 12 kontaktieren sowohl die Borstenwalze 14 als auch der Fahrantrieb 16, nämlich dessen zur Bewegung des Saugvorsatzes 12 wirksamer Teil, also z. B. das dargestellte Rad, einen nicht dargestellten Untergrund.
• Figur 3 zeigt eine schematisch vereinfachte Darstellung einer alternativen Ausführungsform eines erfindungsgemäßen Saugvorsatzes im Querschnitt. In den Grundzügen entspricht der Saugvorsatz 12 dem in Figur 2 Dargestellten, hier ist jedoch der dargestellte Motor 40 zum Antrieb sowohl von Borstenwalze 14 als auch Fahrantrieb 16 vorgesehen und ausgebildet. Der Motor 40 ist dazu mittels des ersten Riemenantriebs 34 mit der Borstenwalze 14 und mittels des zweiten Riemenantriebs 38 mit dem Fahrantrieb 16 gekoppelt.
• Figur 4 zeigt eine schematisch vereinfachte Darstellung einer Ausführungsform eines Sensors 44 in einem Staubsauger-Handgriff 24 im Querschnitt. Der Handgriff 24 umfasst an einem ersten Ende 46 einen Saugrohrstutzen 48 für ein Staubsaugerrohr 20 (Figur 1) und ist an einem zweiten Ende 50 mit einem Staubsaugerschlauch 26 (Figur 1) verbindbar. Ein Luftpfad 52 im Handgriff 24 erlaubt Luftdurchtritt vom Staubsaugerrohr 20 (Figur 1) in den Staubsaugerschlauch 26 (Figur 1). Der Handgriff 24 umfasst auf einer Oberseite 54 als Sensor für eine von einem Benutzer aufgebrachte Schubkraft einen Schalter 56 zur Drehrichtungsumschaltung des Fahrantriebs 16. Bei dem Schalter 56 als Sensor handelt es sich um einen manuellen Sensor 44, weil dieser eine Betätigung durch den Benutzer erfordert. Dargestellt ist auch ein im Handgriff 24 angeordneter Sensor, mit welchem eine Verformung des Handgriffs 24 aufgrund einer Schubkraft, welche durch den Benutzer eingebracht wird, automatisch sensiert wird. Die Verwendung eines manuell zu betätigenden Sensors, also z. B. eines Schalters 56, und eines automatischen Sensors 44 ist alternativ
  oder kumulativ möglich.
• Figur 5 zeigt eine schematisch vereinfachte Darstellung einer Ausführungsform des Schalters 56 wie in Figur 4 dargestellt, von oben.
• Figur 6 zeigt eine schematisch vereinfachte Darstellung einer weiteren Ausführungsform eines Sensors 44 in einem Staubsauger-Handgriff 24 im Querschnitt. Der Handgriff 24 entspricht dabei in seinen Grundzügen dem in Figur 4 Dargestellten, jedoch ist kein Schalter 56 (Figur 4) vorhanden. Zudem ist der Sensor 44 im Saugrohrstutzen 48 angeordnet und zur Sensierung einer Verformung im Bereich der Koppelstelle zwischen Handgriff 24 und Staubsaugerrohr 20 (Figur 1) vorgesehen und ausgebildet.
• Figur 7 zeigt eine schematisch vereinfachte Darstellung einer Ausführungsform eines Sensors 44 im Ansaugstutzen 18 des Saugvorsatzes 12 (Figur 1) im Querschnitt. Der Sensor 44 ist hier zur Sensierung einer Verformung des Ansaugstutzens 18 aufgrund einer Schubkraft, welche durch den Benutzer eingebracht wird, vorgesehen und ausgebildet. Bei dem in Figur 6 und Figur 7 gezeigten Sensor 44 handelt es sich z. B. um einen Dehnungsmessstreifen, ein Piezoelement oder dergleichen.
• Figur 8 zeigt eine schematisch vereinfachte Darstellung einer alternativen Ausführungsform eines Sensors 44a, 44b am Ansaugstutzen 18 im Querschnitt. Der Ansaugstutzen 18 ist mit dem Saugvorsatz 12 mittels eines Lagers 58 gekoppelt und der Sensor 44a, 44b in korrespondierenden Teilen des Lagers 58 angeordnet. Aufgrund einer federnden Verbindung 60 ist eine Reativbewegung (Drehen oder Teleskopieren) von Ansaugstutzen 18 und Saugvorsatz 12 möglich, welche mittels des Sensors 44a, b sensierbar ist. Als Sensoren 44a, b kann beispielsweise eine Spulen-Magnet-Anordnung verwendet werden, anstelle eines Magneten kann auch ferromagnetisches Material eingesetzt werden. Ein Verschieben des Magnets (Sensor 44a) wird durch Änderung der Induktivität oder Resonanzfrequenz angezeigt.
• Figur 9 zeigt eine schematisch vereinfachte Darstellung einer Ausführungsform eines geeigneten Ansaugstutzens 18 im Querschnitt, welcher in seinen Grundzügen dem in Figur 8 Gezeigten entspricht. Hier umfasst das Lager 58 jedoch ein geschlitztes Federelement 62 zur Verbindung von Saugstutzen 18 und Saugvorsatz 12, welches eine teleskopierende Bewegung ermöglicht.

Show in it

FIG. 1

a vacuum cleaner with an embodiment of a suction attachment according to the invention in side view,

FIG. 2

an embodiment of a suction attachment according to the invention in cross section,

FIG. 3

an alternative embodiment of a Saugvorsatzes invention in cross section,

FIG. 4

a sensor in a vacuum cleaner handle in cross-section,

FIG. 5

an embodiment of the sensor FIG. 4 shown in a plan view,

FIG. 6

a further embodiment of a sensor in a vacuum cleaner handle in cross-section,

FIG. 7

a sensor in an intake manifold in cross-section,

FIG. 8

an alternative embodiment of a sensor on an intake manifold in cross section,

FIG. 9

an embodiment of a suitable intake in cross section,

FIG. 10

an embodiment of a suitable mounting part for a sensor in cross section and

FIG. 11

a block diagram illustrating the effect context in the inventive control of the suction attachment.

• FIG. 1 shows a schematically simplified illustration of a vacuum cleaner 10 with an embodiment of a suction attachment 12 according to the invention in a side view. The suction attachment 12 comprises a bristle roller 14 and a rotatable drive 16 and is coupled by means of a suction nozzle 18 with a vacuum cleaner tube 20 of the vacuum cleaner 10. The vacuum cleaner tube 20 comprises at an upper end 22 a handle 24. The vacuum cleaner hose 26 is in turn connected to a base unit 28. The combination of intake manifold 18, vacuum cleaner tube 20, handle 24 and vacuum cleaner hose 26 creates an air path, not shown, from the suction attachment 12 to the base unit 28.
• FIG. 2 shows a schematically simplified representation of an embodiment of a suction attachment 12 according to the invention in cross-section, which substantially the in FIG. 1 Shown corresponds. The bristle roller 14 is drivable by means of a bristle roller drive. This comprises a first motor 32 and a first belt drive 34 for the bristle roller 14. As for the movement of the suction attachment 12 effective part of the traction drive 16, a profiled wheel is shown. This can be driven via a second belt drive 38 and a second motor 40. In operation of the suction attachment 12 contact both the bristle roller 14 and the traction drive 16, namely its effective for moving the suction attachment 12 part, ie z. B. the wheel shown, a substrate, not shown.
• FIG. 3 shows a schematically simplified representation of an alternative embodiment of a suction attachment according to the invention in cross section. In its basic features, the suction attachment 12 corresponds to the in FIG. 2 Shown here, however, the illustrated motor 40 is provided for driving both bristle roller 14 and drive 16 and formed. The motor 40 is coupled by means of the first belt drive 34 with the bristle roller 14 and by means of the second belt drive 38 to the traction drive 16.
• FIG. 4 shows a schematically simplified representation of an embodiment of a sensor 44 in a vacuum cleaner handle 24 in cross section. The handle 24 includes at a first end 46 a suction tube 48 for a vacuum cleaner tube 20 (FIG. FIG. 1 ) and at a second end 50 with a vacuum cleaner hose 26 (FIG. FIG. 1 ) connectable. One Air path 52 in the handle 24 allows air to pass from the vacuum cleaner tube 20 (FIG. FIG. 1 ) into the vacuum cleaner hose 26 (FIG. FIG. 1 ). The handle 24 includes on a top 54 as a sensor for a user applied thrust a switch 56 for reversing the direction of travel of the drive 16. The switch 56 as a sensor is a manual sensor 44, because this requires an operation by the user. Shown is also a sensor arranged in the handle 24, with which a deformation of the handle 24 due to a thrust, which is introduced by the user, is automatically sensed. The use of a manually operated sensor, so z. As a switch 56, and an automatic sensor 44 is alternative
  or cumulatively possible.
• FIG. 5 shows a schematically simplified representation of an embodiment of the switch 56 as in FIG. 4 shown from above.
• FIG. 6 shows a schematically simplified representation of another embodiment of a sensor 44 in a vacuum cleaner handle 24 in cross section. The handle 24 corresponds to its basic features in the FIG. 4 Shown, however, is no switch 56 ( FIG. 4 ) available. In addition, the sensor 44 is arranged in the intake manifold 48 and for sensing a deformation in the region of the coupling point between the handle 24 and vacuum cleaner tube 20 (FIGS. FIG. 1 ) provided and trained.
• FIG. 7 shows a schematically simplified representation of an embodiment of a sensor 44 in the intake manifold 18 of the suction attachment 12 (FIG. FIG. 1 ) in cross section. The sensor 44 is here provided and configured to sense a deformation of the intake manifold 18 due to a thrust force introduced by the user. At the in FIG. 6 and FIG. 7 shown sensor 44 is z. B. to a strain gauge, a piezoelectric element or the like.
• FIG. 8 shows a schematically simplified illustration of an alternative embodiment of a sensor 44a, 44b on the intake manifold 18 in cross section. The intake manifold 18 is coupled to the suction attachment 12 by means of a bearing 58, and the sensor 44a, 44b is disposed in corresponding portions of the bearing 58. Due to a resilient connection 60 is a Reativbewegung (turning or telescoping) of intake manifold 18 and suction attachment 12 is possible, which is sensed by means of the sensor 44a, b. As a sensor 44a, b, for example, a coil-magnet arrangement can be used, instead of a magnet and ferromagnetic material can be used. A displacement of the magnet (sensor 44a) is indicated by changing the inductance or resonance frequency.
• FIG. 9 shows a schematically simplified representation of an embodiment of a suitable intake manifold 18 in cross-section, which in its basic features that in FIG. 8 Shown corresponds. Here, however, the bearing 58 comprises a slotted spring member 62 for connection of suction port 18 and suction attachment 12, which allows a telescoping movement.

Instead of in FIG. 8 shown attachment of the sensor, ie at the transition between suction 12 and intake manifold 18, additionally or alternatively, the attachment of a sensor 44a, 44b, as in FIG. 8 shown, in principle also at other positions between suction attachment 12 and base unit 28, in particular between suction attachment 12 and handle 24 into consideration. These are in FIG. 10 two mutually movably arranged (telescopic) pipe sections 66, 68, which are combined by means of a spring connection 60 shown only in terms of their functionality as a spring. In operation, a relative movement between the pipe sections 66, 68 as well as a relative movement between the in FIG. 8 components are sensed. The spring 60, which is replaced in a practical embodiment by a functionally equivalent spring element 62, thereby counteracting a force introduced by the user and prevents a virtually independent of the size of the introduced force relative movement of the pipe sections 66, 68 to each other.

FIG. 11 shows schematically greatly simplified the context in the control of the drive 16 based on a sensed thrust. For sensing the thrust of the sensor 44 is provided (instead of the automatic sensor 44 shown may also be a switch 56 ( FIG. 4 ) as a manual sensor). The sensor 44 outputs a signal correlated with the user-initiated thrust force to a processing unit 70, the z. B. from Saugabsatz 12, from the handle 24 or from the base unit 28 may be included. The processing unit 70 generates based on the signal received from the sensor 44, a signal for controlling the traction drive 16. The signal for controlling the traction drive 16 may be a signal that causes only a reversal of direction of the traction drive 16, ie a binary signal which a forward or Reverse operation of the traction drive 16 coded. However, the signal generated by the processing unit 70 may also be an analog signal or a bit pattern that encodes both the direction of rotation and a speed of the traction drive 16.

Thus, the invention can be briefly illustrated as follows: Specified is a suction attachment 12 for a vacuum cleaner 10, wherein the suction attachment 12 comprises at least one rotatable bristle roller 14 and wherein the suction attachment 12 is movable with a rotatable drive 16 based on a sensed thrust, a vacuum cleaner 10 with such Suction attachment 12 and with at least one processing unit 70 for controlling the motor 40 and a method for driving such a suction attachment 12th

Claims (9)

Suction attachment (12) for a vacuum cleaner (10),
wherein the suction attachment (12) comprises at least one rotatable bristle roller (14), characterized in that
the suction attachment (12) can be moved by means of an electromotive drive with at least one rotatable travel drive (16) and a motor (40) on the basis of a sensed thrust force. Suction attachment according to claim 1 having at least one sensor (44) for the thrust, by means of which a change in position of displaceable parts of the suction attachment (12) and / or a vacuum cleaner tube (20) can be determined. Suction attachment according to claim 2,
wherein the sensor (44) is at least one switch (56), strain gauges, piezoelectric element, pressure-sensitive resistor, capacitive or inductive sensor, Hall sensor or magnetoresistive sensor. Suction attachment according to one of the preceding claims,
wherein the motor (40) and the traction drive (16) are directly coupled and wherein the suction attachment (12) comprises a circuit for reversing the direction of rotation of the motor (40). Suction attachment according to one of the preceding claims, having at least one roller, endless track or at least one wheel as traction drive (16). Suction attachment according to one of the preceding claims with a bristle roller drive for rotating the bristle roller (14) in a direction opposite to a direction of rotation of the traction drive (16). Suction attachment according to one of the preceding claims,
wherein the motor (40) for driving the bristle roller (14) and drive (16) is provided. Vacuum cleaner with a suction attachment according to one of claims 1 to 7 with at least one processing unit for controlling the motor (40). A method for driving a suction attachment according to any one of claims 1 to 7, wherein a difference of a sensed thrust force and a Saugvorsatz-pushing force of the electric motor driven Saugvorsatzes (12) determined
and the difference by changing drive parameters, in particular the direction of rotation and / or rotational speed, the electric motor drive is adapted to a predetermined or predetermined value.

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