EP0251987B1 - Movable floor cleaning machine - Google Patents

Movable floor cleaning machine Download PDF

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Publication number
EP0251987B1
EP0251987B1 EP87730048A EP87730048A EP0251987B1 EP 0251987 B1 EP0251987 B1 EP 0251987B1 EP 87730048 A EP87730048 A EP 87730048A EP 87730048 A EP87730048 A EP 87730048A EP 0251987 B1 EP0251987 B1 EP 0251987B1
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EP
European Patent Office
Prior art keywords
cleaning machine
floor cleaning
arresting
lever
tool holder
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.)
Expired - Lifetime
Application number
EP87730048A
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German (de)
French (fr)
Other versions
EP0251987A1 (en
Inventor
Dieter Thiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hako Werke GmbH and Co
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Hako Werke GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hako Werke GmbH and Co filed Critical Hako Werke GmbH and Co
Publication of EP0251987A1 publication Critical patent/EP0251987A1/en
Application granted granted Critical
Publication of EP0251987B1 publication Critical patent/EP0251987B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4036—Parts or details of the surface treating tools
    • A47L11/4038—Disk shaped surface treating tools
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/29—Floor-scrubbing machines characterised by means for taking-up dirty liquid
    • A47L11/30—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction
    • A47L11/302—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction having rotary tools
    • A47L11/305—Floor-scrubbing machines characterised by means for taking-up dirty liquid by suction having rotary tools the tools being disc brushes
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4063—Driving means; Transmission means therefor
    • A47L11/4069—Driving or transmission means for the cleaning tools

Definitions

  • the invention relates to a mobile floor cleaning machine with a rotationally driven, essentially disk-shaped work tool, in particular a cleaning brush, which is detachably attached to a tool holder coupled to the shaft of the drive motor (DE-C-930 948).
  • Such floor cleaning machines are known in a wide variety of forms and often have the form of a so-called scrubber drier, i.e. Water is supplied to the working area of a rotating cleaning brush which is in engagement with the floor, and behind the machine the remaining water is taken up again from the floor by means of a suction foot and returned to a liquid container of the machine.
  • a scrubber drier i.e. Water is supplied to the working area of a rotating cleaning brush which is in engagement with the floor, and behind the machine the remaining water is taken up again from the floor by means of a suction foot and returned to a liquid container of the machine.
  • the user occasionally has to change the work tool, either to replace a defective work tool with a new one or to provide another tool for another machining operation, for example to replace the cleaning brush used for wet scrubbing with a type of polishing disc with which a Bean operation is carried out.
  • the replacement of work tools takes place in that the user tilts the floor cleaning machine out of its working position, so that the work tool is easily accessible and can be detached from the tool holder and replaced by another work tool or a replacement work tool.
  • the work tool is replaced in this way, it is desirable on the one hand to be able to carry it out without an auxiliary tool, for example a wrench.
  • the replacement tool must be so firmly connected to the tool holder during operation that it cannot become detached from it.
  • the latter can be achieved by screwing the work tool onto the tool holder or attaching it using a type of strong clamping bayonet connection, but it is then practically no longer possible to loosen the work tool by hand without auxiliary tools, since turning the work tool in the then the tool holder including the motor shaft rotates in the corresponding direction.
  • a floor cleaning machine of the type mentioned at the outset is designed according to the invention by a locking element which can be moved between a release position and a drive position and which, in the locking position, rotates the tool holder preventively comes into engagement with a stop in the tool holder and is disengaged from the tool holder in the release position, the stop preferably being formed by the boundary wall of a recess in the tool holder.
  • the floor cleaning machine according to the invention thus has a locking element provided in it, with the aid of which the tool holder can be held non-rotatably in order to enable the loosening of a work tool attached to it and the fastening of a work tool without auxiliary tools to be used by the user.
  • the locking element can be moved from the release position into the locking position, for example by means of a lifting magnet or by means of a Bowden cable.
  • the locking element consists of a pivotably mounted, two-armed lever, one end of which can be brought into locking engagement with the stop in the tool holder, the lever being in the release position in the operating position of the floor cleaning machine and in a position tilted for releasing the working tool the floor cleaning machine is in the locked position.
  • This lever thus comes into locking engagement with the tool holder only when the tillage machine is in the position in which the replacement of the working tool takes place.
  • a weight body is provided on the arm of the lever, which lies on the side of the pivot axis facing away from the lockable end, with the aid of which the lever is in the operating position of the floor cleaning machine comes into the release position by gravity, while the lever is automatically pivoted by gravity when the floor cleaning machine is tilted so that it comes into the locking position.
  • the weight body can be located above the end of the lever which can be brought into locking engagement and its center of gravity can lie on a perpendicular which in the locking position is closer to the end of the lever which can be brought into locking engagement than in the release position.
  • the weight body need not be designed as a separate body, but also, for example, from a thickening or the like. of the lever arm can be formed.
  • its pivot axis can run perpendicular to the axis of rotation of the working tool.
  • the working tool is accordingly arranged obliquely to the floor, so that only one edge region comes into engagement with the floor and this engagement and thus the strength of the drive through Adjustment of the inclination of the axis of rotation of the work tool can be changed, so the pivot axis of the lever is preferably on the higher side of the work tool with the axis of rotation inclined perpendicularly.
  • the locking element can be attached to the bracket.
  • the floor cleaning machine shown schematically in FIG. 1 is a scrubbing machine to be guided by the user on the handle 9, which runs on wheels 2, 3 and has a plate-shaped cleaning brush 1 which is driven in the direction of the arrow during operation.
  • the cleaning machine is advanced by a slightly inclined position of the cleaning brush 1, so that the portion of the cleaning brush that engages the floor exerts a propelling effect.
  • the cleaning brush 1 is made of a hose 5 a storage container 4 fed cleaning liquid, which supports the cleaning process and which is sucked up behind the main housing of the floor cleaning machine in a known manner by the suction base 7 and guided via a hose 8 into a receiving container 6.
  • the user pivots the operating handle 10 in the direction of the handle 9, as a result of which the motor (not shown in FIG. 1) rotates the cleaning brush 1 and the water supply and suction process is carried out. As soon as the user releases the operating handle 10, the operation of the floor cleaning machine is interrupted.
  • the motor 19 is attached to a U-shaped bracket which has a base plate 22 and leg plates 23.
  • leg plates 23 there are guide slots 24, by means of which the console is held pivotably suspended on stub axles 26 provided on brackets 25.
  • a shaft 20 which is driven by the motor 19 and has an axially extending partial projection 21 extends through the base 22 of the console.
  • a tool holder 14 is placed on this shaft with its central bore 16, the wedge projection 21 of the shaft 20 coming into engagement with a keyway 17 in the tool holder 14, so that the tool holder 14 is held on the shaft 20 in a non-rotatable manner.
  • the attachment of the tool holder (not shown) against loosening from the shaft 20 can be carried out by means of a screw screwed into the shaft 20 in the axial direction and a corresponding washer.
  • the tool holder 14 has radial locking projections 15, which are used to fasten a cleaning brush 1, which has a disk-shaped carrier plate 11 and bristles 12 which extend essentially downwards in FIG. In the central region of the carrier plate 11 there is an opening, in the edge region of which elastic clamping tongues are formed.
  • the brush 1 is pressed against the tool holder 14 from below, so that the central cylindrical region of the tool holder 14 extends through the central opening in the carrier plate 11 and the locking projections 15 are adjacent to the free ends of the clamping tongues 13 lie.
  • the locking projections 15 are then pushed under the clamping tongues 13 and thus a firm, clamping engagement between the tool holder 14 and the cleaning brush 1 is produced.
  • a lever 30 serving as a locking element is provided.
  • aligned bores 37 are attached to the underside of the bottom 22 of the bracket, the clear spacing of which is somewhat greater than the length of the bearing bush 31 of the lever 30.
  • This bearing bush can be brought between the tabs 37 and by means of the Pin 36, which then extends through the holes in the tab 37 and the central bore in the socket 31 and is secured against displacement in the usual manner, are pivotally attached to the bracket about the axis 31 ⁇ , the axis 31 ⁇ perpendicular to the shaft 20 and thus runs to the axis of rotation 1 ⁇ of the cleaning brush 1.
  • the lever 30 has at its end located between the bottom 22 of the console and the tool holder 14 Arms 32 has a hook-shaped end 33, while its arm 34 located outside the area of the console is angled upward and carries a weight body 35 at its free end.
  • the lever 30 In the normal operating position of the floor cleaning machine, the lever 30 is in the release position shown in FIG. 3, in which the perpendicular L runs through the center of gravity of the weight body 35 on the side of the pivot axis 31 ⁇ facing away from the arm 23.
  • FIG. 3 shows a position of the axis of rotation of the tool holder 14 which is pivoted by 3.5 ° with respect to the vertical, and thus the cleaning brush 1.
  • This pivoted position is achieved by controlled pivoting of the console 22, 23 and thus the motor 19 around the stub axle 26, wherein, as can be seen in FIG. 3, that side of the cleaning brush 1 comes into engagement with the floor and generates a propulsion for the floor cleaning machine which is on the opposite side of the pivot axis 31 ⁇ of the axis of rotation 1 ⁇ .
  • the propulsion can be controlled by adjusting the inclination of the axis of rotation 1 ⁇ .
  • the floor cleaning machine can be tilted so that the axis of rotation 1 ⁇ of the tool holder 14 and the cleaning brush 1, as shown in FIG. 4, is inclined even more with respect to the vertical, approximately by 30 °.
  • the weight body 35 has been shifted with its center of gravity up to beyond the pivot axis 31 ⁇ in the direction of the arm 32 of the lever 30, so that the vertical line L through its center of gravity is now on the other side of the pivot axis 31 ⁇ compared to FIG. 3 lies.
  • the lever 30 is tilted about the pivot axis 31 ⁇ into the locking position shown in FIG. 4, in which the end 33 of the arm 32 of the lever 30 enters one of the cutouts 18 in the tool holder 14.
  • these pocket-shaped recesses 18 lie adjacent to the hub region of the tool holder 14 surrounding the central bore 16 and are separated from one another by axially and radially extending wall sections. If the cleaning brush 1 is now rotated by hand to release it from the tool holder 14 when the floor cleaning machine is tilted and the lever 30 in the locking position shown in FIG Rotation of the tool holder 14, ie the cleaning brush 1 can be easily released by the user even with a relatively firm connection of the tool holder 14 and the cleaning brush 1 without the aid of an additional tool.
  • a replacement cleaning brush or another working tool can then be placed on the tool holder 14 and brought into firm engagement by rotation, because the lever 30 prevents the tool holder 14 from rotating in its locking position.

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  • Cleaning In General (AREA)

Description

Die Erfindung bezieht sich auf eine fahrbare Bodenreini­gungsmaschine mit einem drehend angetriebenen, im wesent­lichen scheibenförmigen Arbeitswerkzeug, insbesondere Reinigungsbürste, das lösbar an einem mit der Welle des Antriebsmotors gekoppelten Werkzeughalter befestigt ist (DE-C-930 948).The invention relates to a mobile floor cleaning machine with a rotationally driven, essentially disk-shaped work tool, in particular a cleaning brush, which is detachably attached to a tool holder coupled to the shaft of the drive motor (DE-C-930 948).

Derartige Bodenreinigungsmaschinen sind in unterschied­lichsten Formen bekannt und haben häufig die Form einer sogenannten Scheuersaugmaschine, d.h. dem Arbeitsbereich der einer in Eingriff mit dem Boden stehenden, sich drehen­den Reinigungsbürste wird Wasser zugeführt, und hinter der Maschine wird das restliche Wasser mittels eines Saugfußes wieder vom Boden aufgenommen und in einen Flüs­sigkeitsbehälter der Maschine zurückgeführt.Such floor cleaning machines are known in a wide variety of forms and often have the form of a so-called scrubber drier, i.e. Water is supplied to the working area of a rotating cleaning brush which is in engagement with the floor, and behind the machine the remaining water is taken up again from the floor by means of a suction foot and returned to a liquid container of the machine.

Bei derartigen Bodenreinigungsmaschinen muß der Benutzer gelegentlich das Arbeitswerkzeug auswechseln, entweder um ein schadhaft gewordenes Arbeitswerkzeug durch ein neues zu ersetzen oder um für einen anderen Bearbeitungs­vorgang ein anderes Werkzeug vorzusehen, etwa um die zum Naßscheuern verwendete Reinigungsbürste durch eine Art Polierscheibe zu ersetzen, mit der ein Bohnervorgang durchgeführt wird.In such floor cleaning machines, the user occasionally has to change the work tool, either to replace a defective work tool with a new one or to provide another tool for another machining operation, for example to replace the cleaning brush used for wet scrubbing with a type of polishing disc with which a Bean operation is carried out.

Insbesondere bei handgeführten Bodenreinigungsmaschinen erfolgt das Austauschen von Arbeitswerkzeugen dadurch, daß der Benutzer die Bodenreinigungsmaschine aus ihrer Arbeitsstellung kippt, so daß das Arbeitswerkzeug leicht zugänglich ist und vom Werkzeughalter gelöst und durch ein anderes Arbeitswerkzeug bzw. ein Austausch-Arbeits­werkzeug ersetzt werden kann. Bei einem derartigen Aus­tausch des Arbeitswerkzeuges ist es einerseits erwünscht, diesen ohne ein Hilfswerkzeug, etwa einen Schraubenschlüs­sel durchführen zu können. Andererseits muß das Austausch­werkzeug im Betrieb so fest mit dem Werkzeughalter verbun­den sein, daß es sich nicht von diesem lösen kann. Letz­teres läßt sich zwar dadurch erreichen, daß man das Ar­beitswerkzeug auf den Werkzeughalter aufschraubt oder über eine Art stark klemmender Bajonettverbindung befe­stigt, doch ist es dann praktisch nicht mehr möglich, das Arbeitswerkzeug ohne Hilfswerkzeug von Hand zu lösen, da sich beim Drehen des Arbeitswerkzeuges in der ent­sprechenden Richtung dann auch der Werkzeughalter ein­schließlich der Motorwelle dreht.In the case of hand-held floor cleaning machines in particular, the replacement of work tools takes place in that the user tilts the floor cleaning machine out of its working position, so that the work tool is easily accessible and can be detached from the tool holder and replaced by another work tool or a replacement work tool. When the work tool is replaced in this way, it is desirable on the one hand to be able to carry it out without an auxiliary tool, for example a wrench. On the other hand, the replacement tool must be so firmly connected to the tool holder during operation that it cannot become detached from it. The latter can be achieved by screwing the work tool onto the tool holder or attaching it using a type of strong clamping bayonet connection, but it is then practically no longer possible to loosen the work tool by hand without auxiliary tools, since turning the work tool in the then the tool holder including the motor shaft rotates in the corresponding direction.

Es ist Aufgabe der Erfindung, eine Bodenreinigungsmaschine so zu verbessern, daß bei verhältnismäßig fester Verbindung zwischen Arbeitswerkzeug und Werkzeughalter ohne vom Benutzer einzusetzendes Werkzeug ein Lösen des Arbeitswerk­zeugs vom Werkzeughalter möglich ist.It is an object of the invention to improve a floor cleaning machine so that with a relatively firm connection between the work tool and the tool holder, the work tool can be detached from the tool holder without tools to be used by the user.

Zur Lösung dieser Aufgabe wird eine Bodenreinigungsmaschine der eingangs erwähnten Art erfindungsgemäß ausgestaltet durch ein zwischen einer Freigabestellung und einer An­triebsstellung bewegbares Arretierelement, das in der Arretierstellung eine Verdrehung des Werkzeughalters verhindernd in Eingriff mit einem Anschlag im Werkzeug­halter kommt und in der Freigabestellung außer Eingriff mit dem Werkzeughalter steht, wobei der Anschlag vorzugs­weise von der Begrenzungswand einer Aussparung im Werkzeug­halter gebildet ist.To achieve this object, a floor cleaning machine of the type mentioned at the outset is designed according to the invention by a locking element which can be moved between a release position and a drive position and which, in the locking position, rotates the tool holder preventively comes into engagement with a stop in the tool holder and is disengaged from the tool holder in the release position, the stop preferably being formed by the boundary wall of a recess in the tool holder.

Die erfindungsgemäße Bodenreinigungsmaschine weist somit ein in ihr vorgesehenes Arretierelement auf, mit dessen Hilfe der Werkzeughalter unverdrehbar gehalten werden kann, um das Lösen eines an ihm befestigten Arbeitswerk­zeuges sowie das Befestigen eines Arbeitswerkzeuges ohne vom Benutzer einzusetzende Hilfswerkzeuge zu ermöglichen. Das Arretierelement kann beispielsweise durch einen Hub­magneten oder mittels eines Bowdenzuges von der Freigabe­stellung in die Arretierstellung bewegt werden.The floor cleaning machine according to the invention thus has a locking element provided in it, with the aid of which the tool holder can be held non-rotatably in order to enable the loosening of a work tool attached to it and the fastening of a work tool without auxiliary tools to be used by the user. The locking element can be moved from the release position into the locking position, for example by means of a lifting magnet or by means of a Bowden cable.

In einer bevorzugten Ausgestaltung besteht das Arretier­element aus einem schwenkbar gelagerten, zweiarmigen Hebel, dessen eines Ende in arretierenden Eingriff mit dem Anschlag im Werkzeughalter bringbar ist, wobei der Hebel sich in der Betriebsstellung der Bodenreinigungs­maschine in der Freigabestellung und in einer zum Lösen des Arbeitswerkzeugs gekippten Stellung der Bodenreinigungs­maschine in der Arretierstellung befindet.In a preferred embodiment, the locking element consists of a pivotably mounted, two-armed lever, one end of which can be brought into locking engagement with the stop in the tool holder, the lever being in the release position in the operating position of the floor cleaning machine and in a position tilted for releasing the working tool the floor cleaning machine is in the locked position.

Dieser Hebel kommt somit nur dann in arretierenden Eingriff mit dem Werkzeughalter, wenn sich die Bodenbearbeitungs­maschine in derjenigen Lage befindet, in der der Austausch des Arbeitswerkzeugs stattfindet.This lever thus comes into locking engagement with the tool holder only when the tillage machine is in the position in which the replacement of the working tool takes place.

Dies kann beispielsweise dadurch erreicht werden, daß am Arm des Hebels, der an der dem in arretierenden Eingriff bringbaren Ende abgewandten Seite der Schwenkachse liegt, ein Gewichtskörper vorgesehen ist, mit dessen Hilfe der Hebel in der Betriebsstellung der Bodenreinigungsmaschine durch Schwerkraft in die Freigabestellung kommt, während der Hebel beim Kippen der Bodenreinigungsmaschine durch Schwerkraft selbsttätig so verschwenkt wird, daß er in die Arretierstellung gelangt. Hierzu kann sich der Gewichts­körper oberhalb des in arretierenden Eingriff bringbaren Endes des Hebels befinden und sein Schwerpunkt kann auf einer Lotrechten liegen, die in der Arretierstellung dem in arretierenden Eingriff bringbaren Ende des Hebels näher ist als in der Freigabestellung.This can be achieved, for example, in that a weight body is provided on the arm of the lever, which lies on the side of the pivot axis facing away from the lockable end, with the aid of which the lever is in the operating position of the floor cleaning machine comes into the release position by gravity, while the lever is automatically pivoted by gravity when the floor cleaning machine is tilted so that it comes into the locking position. For this purpose, the weight body can be located above the end of the lever which can be brought into locking engagement and its center of gravity can lie on a perpendicular which in the locking position is closer to the end of the lever which can be brought into locking engagement than in the release position.

Es sei erwähnt, daß der Gewichtskörper nicht als gesonder­ter Körper ausgebildet zu sein braucht, sondern beispiels­weise auch von einer Verdickung o.ä. des Hebelarms gebil­det sein kann.It should be mentioned that the weight body need not be designed as a separate body, but also, for example, from a thickening or the like. of the lever arm can be formed.

Um ein optimales Verschwenken des Hebels zu ermöglichen, kann seine Schwenkachse senkrecht zur Drehachse des Ar­beitswerkzeugs verlaufen.In order to enable the lever to be pivoted optimally, its pivot axis can run perpendicular to the axis of rotation of the working tool.

Wird die Bodenreinigungsmaschine in bekannter Weise durch die Drehung des Arbeitswerkzeugs über den zu reinigenden Boden bewegt, ist also das Arbeitswerkzeug entsprechend schräg zum Boden angeordnet, so daß nur sein einer Rand­bereich in Eingriff mit dem Boden kommt und dieser Eingriff und damit die Stärke des Vortriebs durch Verstellung der Neigung der Drehachse des Arbeitswerkzeugs verändert werden kann, so befindet sich die Schwenkachse des Hebels vorzugsweise an der bei zur Lotrechten geneigten Dreh­achse höheren Seite des Arbeitswerkzeugs.If the floor cleaning machine is moved in a known manner by the rotation of the working tool over the floor to be cleaned, the working tool is accordingly arranged obliquely to the floor, so that only one edge region comes into engagement with the floor and this engagement and thus the strength of the drive through Adjustment of the inclination of the axis of rotation of the work tool can be changed, so the pivot axis of the lever is preferably on the higher side of the work tool with the axis of rotation inclined perpendicularly.

Ist der Antriebsmotor der Bodenreinigungsmaschine in einer Konsole gehalten, durch deren Bodenwand sich die den Werkzeughalter tragende Welle erstreckt, so kann das Arretierelement an der Konsole befestigt sein.If the drive motor of the floor cleaning machine is held in a bracket, through whose bottom wall the shaft carrying the tool holder extends, the locking element can be attached to the bracket.

Die Erfindung wird im folgenden anhand der ein Ausführungs­beispiel zeigenden Figuren näher erläutert.

  • Figur 1 zeigt in einer schematischen, perspektivischen Darstellung eine Bodenreinigungsmaschine.
  • Figur 2 zeigt in auseinandergezogener Darstellung den Antriebsmotor, das aus einem zweiarmigen Hebel bestehende Arretierelement, den Werkzeughalter und das Arbeitswerkzeug in Form einer Bürste einer Bodenreinigungsmaschine.
  • Figur 3 zeigt in einer Teildarstellung den Werkzeughalter in einer leicht geneigten Stellung für den Eingriff des Arbeitswerkzeugs mit dem Boden und den Vortrieb der Bodenreinigungsmaschine sowie den Hebel in der Freigabestellung.
  • Figur 4 zeigt in einer Darstellung ähnlich Figur 3 die Lage des Werkzeughalters bei sich in der Stellung zum Lösen des Arbeitswerkzeugs befindlicher Boden­reinigungsmaschine und den Hebel in der Arrtier­stellung.
The invention is explained in more detail below with reference to the figures showing an embodiment.
  • Figure 1 shows a schematic, perspective view of a floor cleaning machine.
  • Figure 2 shows an exploded view of the drive motor, the locking element consisting of a two-armed lever, the tool holder and the working tool in the form of a brush of a floor cleaning machine.
  • Figure 3 shows a partial view of the tool holder in a slightly inclined position for the engagement of the work tool with the floor and the propulsion of the floor cleaning machine and the lever in the release position.
  • Figure 4 shows a representation similar to Figure 3, the position of the tool holder with the floor cleaning machine in the position for releasing the work tool and the lever in the locking position.

Die in Figur 1 schematisch dargestellte Bodenreinigungs­maschine ist eine vom Benutzer am Griffbügel 9 zu führende Schrubbmaschine, die auf Rädern 2, 3 läuft und eine teller­förmige Reinigungsbürste 1 aufweist, die im Betrieb in Pfeilrichtung angetrieben wird. Der Vorschub der Reini­gungsmaschine erfolgt durch leicht geneigte Stellung der Reinigungsbürste 1, so daß der in Eingriff mit dem Boden stehende Teilbereich der Reinigungsbürste ein Vor­triebswirkung ausübt.The floor cleaning machine shown schematically in FIG. 1 is a scrubbing machine to be guided by the user on the handle 9, which runs on wheels 2, 3 and has a plate-shaped cleaning brush 1 which is driven in the direction of the arrow during operation. The cleaning machine is advanced by a slightly inclined position of the cleaning brush 1, so that the portion of the cleaning brush that engages the floor exerts a propelling effect.

Der Reinigungsbürste 1 wird über einen Schlauch 5 aus einem Vorratsbehälter 4 Reinigungsflüssigkeit zugeführt, die den Reinigungsvorgang unterstützt und die hinter dem Hauptgehäuse der Bodenreinigungsmaschine in bekannter Weise vom Saugfuß 7 aufgesaugt und über einen Schlauch 8 in einen Aufnahmebehälter 6 geführt wird.The cleaning brush 1 is made of a hose 5 a storage container 4 fed cleaning liquid, which supports the cleaning process and which is sucked up behind the main housing of the floor cleaning machine in a known manner by the suction base 7 and guided via a hose 8 into a receiving container 6.

Zum Betreiben der Maschine verschwenkt der Benutzer den Bedienungsholm 10 in Richtung auf den Griffbügel 9, wodurch der in Figur 1 nicht dargestellte Motor die Reinigungs­bürste 1 dreht und der Wasserzufuhr- und -absaugvorgang durchgeführt wird. Sobald der Benutzer den Bedienungsholm 10 freigibt, wird der Betrieb der Bodenreinigungsmaschine unterbrochen.To operate the machine, the user pivots the operating handle 10 in the direction of the handle 9, as a result of which the motor (not shown in FIG. 1) rotates the cleaning brush 1 and the water supply and suction process is carried out. As soon as the user releases the operating handle 10, the operation of the floor cleaning machine is interrupted.

Wie Figur 2 zu entnehmen ist, ist der Motor 19 auf einer U-förmigen Konsole befestigt, die eine Bodenplatte 22 und Schenkelplatten 23 hat. In den Schenkelplatten 23 befinden sich Führschlitze 24, mit denen die Konsole an an Haltewinkeln 25 vorgesehenen Achsstummel 26 ver­schwenkbar aufgehängt gehalten wird.As can be seen in Figure 2, the motor 19 is attached to a U-shaped bracket which has a base plate 22 and leg plates 23. In the leg plates 23 there are guide slots 24, by means of which the console is held pivotably suspended on stub axles 26 provided on brackets 25.

Durch den Boden 22 der Konsole erstreckt sich eine vom Motor 19 angetriebene Welle 20, die einen axial verlaufen­den Teilvorsprung 21 hat. Auf diese Welle ist mit seiner Mittelbohrung 16 ein Werkzeughalter 14 aufgesetzt, wobei der Keilvorsprung 21 der Welle 20 in Eingriff mit einer Keilnut 17 im Werkzeughalter 14 kommt, so daß der Werk­zeughalter 14 unverdrehbar auf der Welle 20 gehalten ist. Die nicht dargestellte Befestigung des Werkzeughal­ters gegen Lösen von der Welle 20 kann mittels einer in axialer Richtung in die Welle 20 eingeschraubten Schraube und einer entsprechenden Unterlegscheibe erfolgen.A shaft 20 which is driven by the motor 19 and has an axially extending partial projection 21 extends through the base 22 of the console. A tool holder 14 is placed on this shaft with its central bore 16, the wedge projection 21 of the shaft 20 coming into engagement with a keyway 17 in the tool holder 14, so that the tool holder 14 is held on the shaft 20 in a non-rotatable manner. The attachment of the tool holder (not shown) against loosening from the shaft 20 can be carried out by means of a screw screwed into the shaft 20 in the axial direction and a corresponding washer.

Der Werkzeughalter 14 hat radiale Verriegelungsvorsprünge 15, die zur Befestigung einer Reinigungsbürste 1 dienen, die eine scheibenförmige Trägerplatte 11 und sich in Figur 2 im wesentlich nach unten erstreckende Borsten 12 aufweist. Im Mittelbereich der Trägerplatte 11 befindet sich eine Öffnung, in deren Randbereich elastische Klemm­zungen ausgebildet sind. Zur Befestigung der Reinigungs­bürste 11 am Werkzeughalter 14 wird die Bürste 1 von unten gegen den Werkzeughalter 14 gedrückt, so daß sich der mittlere zylindrische Bereich des Werkzeughalters 14 durch die Mittelöffnung in der Trägerplatte 11 er­streckt und die Verriegelungsvorsprünge 15 benachbart zu den freien Enden der Klemmzungen 13 liegen. Durch Verdrehung der Reinigungsbürste 1 werden dann die Verriege­lungsvorsprünge 15 unter die Klemmzungen 13 geschoben und so ein fester, klemmender Eingriff zwischen Werkzeug­halter 14 und Reinigungsbürste 1 hergestellt.The tool holder 14 has radial locking projections 15, which are used to fasten a cleaning brush 1, which has a disk-shaped carrier plate 11 and bristles 12 which extend essentially downwards in FIG. In the central region of the carrier plate 11 there is an opening, in the edge region of which elastic clamping tongues are formed. To attach the cleaning brush 11 to the tool holder 14, the brush 1 is pressed against the tool holder 14 from below, so that the central cylindrical region of the tool holder 14 extends through the central opening in the carrier plate 11 and the locking projections 15 are adjacent to the free ends of the clamping tongues 13 lie. By turning the cleaning brush 1, the locking projections 15 are then pushed under the clamping tongues 13 and thus a firm, clamping engagement between the tool holder 14 and the cleaning brush 1 is produced.

Da bei Ausübung eines Drehmomentes auf den Werkzeughalter 14 dieser sich normalerweise mit der Welle 20 und der Welle des Motors 19 dreht, ist ein als Arretierelement dienender Hebel 30 vorgesehen. Zur Befestigung dieses Hebels sind an der Unterseite des Bodens 22 der Konsole 2 fluchtende Bohrungen aufweisende Lappen 37 befestigt, deren lichter Abstand voneinander etwas größer ist als die Länge der Lagerbuchse 31 des Hebels 30. Dadurch kann diese Lagerbuchse zwischen die Lappen 37 gebracht und mittels des Stiftes 36, der sich dann durch die Bohrungen in den Lappen 37 und die Mittelbohrung in der Buchse 31 erstreckt und gegen Verschiebung in üblicher Weise gesichert ist, an der Konsole um die Achse 31ʹ schwenkbar befestigt werden, wobei die Achse 31ʹ senkrecht zur Welle 20 und damit zur Drehachse 1ʹ der Reinigungsbürste 1 verläuft.Since, when a torque is exerted on the tool holder 14, it normally rotates with the shaft 20 and the shaft of the motor 19, a lever 30 serving as a locking element is provided. To fasten this lever 2 aligned bores 37 are attached to the underside of the bottom 22 of the bracket, the clear spacing of which is somewhat greater than the length of the bearing bush 31 of the lever 30. This bearing bush can be brought between the tabs 37 and by means of the Pin 36, which then extends through the holes in the tab 37 and the central bore in the socket 31 and is secured against displacement in the usual manner, are pivotally attached to the bracket about the axis 31ʹ, the axis 31ʹ perpendicular to the shaft 20 and thus runs to the axis of rotation 1ʹ of the cleaning brush 1.

Der Hebel 30 weist am Ende seines sich zwischen dem Boden 22 der Konsole und dem Werkzeughalter 14 befindenden Arms 32 ein hakenförmiges Ende 33 auf, während sein außer­halb des Bereichs der Konsole befindender Arm 34 nach oben abgewinkelt ist und an seinem freien Ende einen Gewichtskörper 35 trägt.The lever 30 has at its end located between the bottom 22 of the console and the tool holder 14 Arms 32 has a hook-shaped end 33, while its arm 34 located outside the area of the console is angled upward and carries a weight body 35 at its free end.

In der normalen Betriebsstellung der Bodenreinigungsma­schine befindet sich der Hebel 30 in der in Figur 3 gezeig­ten Freigabestellung, in der die Lotrechte L durch den Schwerpunkt des Gewichtskörpers 35 an der dem Arm 23 abgewandten Seite der Schwenkachse 31ʹ verläuft.In the normal operating position of the floor cleaning machine, the lever 30 is in the release position shown in FIG. 3, in which the perpendicular L runs through the center of gravity of the weight body 35 on the side of the pivot axis 31ʹ facing away from the arm 23.

In diesem Zusammenhang sei erwähnt, daß in Figur 3 eine um 3,5° gegenüber der Lotrechten verschwenkte Lage der Drehachse des Werkzeughalters 14 und damit der Reinigungs­bürste 1 gezeigt ist. Diese verschwenkte Lage wird durch gesteuertes Verschwenken der Konsole 22, 23 und damit des Motors 19 um die Achsstummel 26 erreicht, wobei, wie Figur 3 zu entnehmen ist, diejenige Seite der Reini­gungsbürste 1 in Eingriff mit dem Boden kommt und einen Vortrieb für die Bodenreinigungsmaschine erzeugt, die an der der Schwenkachse 31ʹ gegenüberliegenden Seite der Drehachse 1ʹ liegt. Wie bereits erwähnt, kann der Vortrieb durch Verstellung der Neigung der Drehachse 1ʹ gesteuert werden.In this connection it should be mentioned that FIG. 3 shows a position of the axis of rotation of the tool holder 14 which is pivoted by 3.5 ° with respect to the vertical, and thus the cleaning brush 1. This pivoted position is achieved by controlled pivoting of the console 22, 23 and thus the motor 19 around the stub axle 26, wherein, as can be seen in FIG. 3, that side of the cleaning brush 1 comes into engagement with the floor and generates a propulsion for the floor cleaning machine which is on the opposite side of the pivot axis 31ʹ of the axis of rotation 1ʹ. As already mentioned, the propulsion can be controlled by adjusting the inclination of the axis of rotation 1ʹ.

Zum Entfernen der Reinigungsbürste 1 kann die Bodenreini­gungsmaschine gekippt werden, so daß die Drehachse 1ʹ des Werkzeughalters 14 und der Reinigungsbürste 1, wie in Figur 4 gezeigt, noch stärker gegenüber der Lotrechten geneigt wird, etwa um 30°. In dieser Lage ist der Gewichts­körper 35 mit seinem Schwerpunkt bis über die Schwenkachse 31ʹ hinaus in Richtung auf den Arm 32 des Hebels 30 verla­gert worden, so daß die Lotrechte L durch seinen Schwer­punkt nunmehr an der, verglichen mit Figur 3, anderen Seite der Schwenkachse 31ʹ liegt. Infolge Schwerkraft erfolgt deshalb ein Kippen des Hebels 30 um die Schwenk­achse 31ʹ in die in Figur 4 gezeigte Arretierstellung, in der das Ende 33 des Arms 32 des Hebels 30 in eine der Aussparungen 18 im Werkzeughalter 14 eintritt. Wie in Figur 2 dargestellt, liegen diese taschenförmigen Aussparungen 18 benachbart zum die Mittelbohrung 16 umge­benden Nabenbereich des Werkzeughalters 14 und sind durch axial und radial verlaufende Wandabschnitte voneinander getrennt. Wird nun bei gekippter Bodenreinigungsmaschine und in der Arretierstellung gemäß Figur 4 befindlichem Hebel 30 die Reinigungsbürste 1 zum Lösen vom Werkzeug­halter 14 von Hand verdreht, so kommt das Ende 33 des Arms 32 des Hebels 30 zur Anlage an der Begrenzungswand der entsprechenden Aussparung 18 und verhindert eine Verdrehung des Werkzeughalters 14, d.h. die Reinigungs­bürste 1 kann auch bei verhältnismäßig fester Verbindung von Werkzeughalter 14 und Reinigungsbürste 1 ohne Hilfe eines Zusatzwerkzeuges leicht vom Benutzer gelöst werden.To remove the cleaning brush 1, the floor cleaning machine can be tilted so that the axis of rotation 1ʹ of the tool holder 14 and the cleaning brush 1, as shown in FIG. 4, is inclined even more with respect to the vertical, approximately by 30 °. In this position, the weight body 35 has been shifted with its center of gravity up to beyond the pivot axis 31ʹ in the direction of the arm 32 of the lever 30, so that the vertical line L through its center of gravity is now on the other side of the pivot axis 31ʹ compared to FIG. 3 lies. As a result of gravity Therefore, the lever 30 is tilted about the pivot axis 31ʹ into the locking position shown in FIG. 4, in which the end 33 of the arm 32 of the lever 30 enters one of the cutouts 18 in the tool holder 14. As shown in FIG. 2, these pocket-shaped recesses 18 lie adjacent to the hub region of the tool holder 14 surrounding the central bore 16 and are separated from one another by axially and radially extending wall sections. If the cleaning brush 1 is now rotated by hand to release it from the tool holder 14 when the floor cleaning machine is tilted and the lever 30 in the locking position shown in FIG Rotation of the tool holder 14, ie the cleaning brush 1 can be easily released by the user even with a relatively firm connection of the tool holder 14 and the cleaning brush 1 without the aid of an additional tool.

Entsprechend kann auf den Werkzeughalter 14 dann eine Ersatz-Reinigungsbürste oder ein anderes Arbeitswerkzeug aufgesetzt und durch Verdrehung in festen Eingriff gebracht werden, weil der Hebel 30 in seiner Arretierstellung eine Verdrehung des Werkzeughalters 14 verhindert.Correspondingly, a replacement cleaning brush or another working tool can then be placed on the tool holder 14 and brought into firm engagement by rotation, because the lever 30 prevents the tool holder 14 from rotating in its locking position.

Wird die Bodenreinigungsmaschine in ihre Betriebsstellung zurückgekippt, in der sie auf allen vier Rädern 2, 3 ruht, wird der Schwerpunkt des Gewichtskörpers 35 des Hebels 30 wieder in eine Lage links von der Schwenkachse 31ʹ (Figuren 3 und 4) gebracht, so daß der Hebel 30 infolge Schwerkraft selbsttätig wieder in die Freigabestellung gemäß Figur 3 kippt.If the floor cleaning machine is tilted back into its operating position, in which it rests on all four wheels 2, 3, the center of gravity of the weight body 35 of the lever 30 is brought back into a position to the left of the pivot axis 31ʹ (Figures 3 and 4), so that the lever 30 automatically tilts back into the release position according to FIG. 3 as a result of gravity.

Claims (9)

1. Mobile floor cleaning machine having a rotatably driven, essentially disc-shaped working tool (1), in particular cleaning brush, which is fixed detachably on a tool holder (14) coupled with the shaft of the drive motor (19), characterized by an arresting element (30) which is movable between a release position and an arresting position and which, in the arresting position, comes into engagement with a stop on the tool holder (14) preventing a rotation of the tool holder (14) and, in the release position, is not engaged with the tool holder (14).
2. Mobile floor cleaning machine according to Claim 1, characterized in that the stop is formed by the boundary wall of a recess 18 .
3. Mobile floor cleaning machine according to Claim 1 or 2, characterized in that the arresting element consists of a swivellably mounted, two-arm lever (30), the one end (33) of which can be brought into arresting engagement with the stop on the tool holder (14), and in that in the operating position of the floor cleaning machine the lever (30) is in the release position and in a tilted position of the floor cleaning machine for detaching the working tool (1) the lever (30) is in the arresting position.
4. Mobile floor cleaning machine according to Claim 3, characterized in that a weight (35) is provided on the arm (34) of the lever (30), which arm is located on the side of the swivel axis (31ʹ) facing away from the end (33) which can be brought into arresting engagment.
5. Mobile floor cleaning machine according to Claim 4, characterized in that the weight (35) is situated above the end (33) of the lever (30) which can be brought into arresting engagement and its centre of gravity is located on a vertical (L) which, in the arresting posi­tion, is closer to the end (33) of the lever (30) which can be brought into arresting engagement than in the release position.
6. Mobile floor cleaning machine according to one of Claims 3 to 5, characterized in that the swivel axis (31ʹ) of the lever (30) extends perpendicular to the axis of rotation (1ʹ) of the working tool (1).
7. Mobile floor cleaning machine according to one of Claims 3 to 6 having an axis of rotation (1ʹ) of the working tool [sic] (14), which axis of rotation can be adjusted in its inclination to control the propulsion, characterized in that the swivel axis (31ʹ) of the lever (30) is situated on the side of the working tool (1) which is higher when the axis of rotation (1ʹ) is in­clined in relation to the vertical.
8. Mobile floor cleaning machine according to one of Claims 1 to 7, in which the drive motor (19) is held in a bracket (22, 23), through the bottom wall (22) of which the shaft (20) bearing the tool holder (14) extends, characterized in that the arresting element (30) is fixed on the bracket (22, 23).
9. Mobile floor cleaning machine according to Claim 1 or 2, characterized in that the arresting element is movable from the release position into the arresting position by a lifting magnet or a Bowden cable.
EP87730048A 1986-06-27 1987-05-06 Movable floor cleaning machine Expired - Lifetime EP0251987B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8617171U DE8617171U1 (en) 1986-06-27 1986-06-27 Mobile floor cleaning machine
DE8617171U 1986-06-27

Publications (2)

Publication Number Publication Date
EP0251987A1 EP0251987A1 (en) 1988-01-07
EP0251987B1 true EP0251987B1 (en) 1991-01-02

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ID=6795942

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EP87730048A Expired - Lifetime EP0251987B1 (en) 1986-06-27 1987-05-06 Movable floor cleaning machine

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EP (1) EP0251987B1 (en)
DE (2) DE8617171U1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005045310B3 (en) * 2005-09-16 2007-03-22 Alfred Kärcher Gmbh & Co. Kg Mobile floor cleaning machine
DE102008060099B3 (en) * 2008-11-25 2010-07-15 Stein & Co. Gmbh Device for care discs
US20140237743A1 (en) * 2013-02-27 2014-08-28 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology
US10251524B2 (en) 2013-02-27 2019-04-09 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology

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Publication number Priority date Publication date Assignee Title
DE3708087A1 (en) * 1987-03-13 1988-09-22 Henkel Kgaa MOBILE FLOOR CLEANING MACHINE
DE3708086A1 (en) * 1987-03-13 1988-09-22 Henkel Kgaa MOBILE FLOOR CLEANING MACHINE
DE20112322U1 (en) * 2001-07-26 2001-10-25 Hako-Werke GmbH, 23843 Bad Oldesloe Device for fastening and / or driving a brush body
US6871371B2 (en) * 2002-04-16 2005-03-29 Castle Rock Industries, Inc Floor care machine with replaceable floor care element
DE102005039095A1 (en) * 2005-08-09 2007-02-15 Alfred Kärcher Gmbh & Co. Kg Holder for polishing or scrubbing disc
DE102009014560A1 (en) 2009-03-16 2010-09-23 Alfred Kärcher Gmbh & Co. Kg Replaceable sweeping brush and sweeper with such sweeping brush device
WO2010105639A1 (en) 2009-03-17 2010-09-23 Alfred Kärcher Gmbh & Co. Kg Automotive roadsweeper
DE102011002978B4 (en) * 2011-01-21 2012-08-16 Süddeutsche Bürsten- und Kunststoffabrik Eugen Gutmann GmbH Brush disc, machine-side flange and coupling device comprising a brush disc and a flange
KR20160057406A (en) 2013-09-13 2016-05-23 알프레드 캐르혀 게엠베하 운트 컴파니. 카게 Cleaning tool for a floor cleaning machine and a floor cleaning machine
CN113367619B (en) * 2021-06-28 2022-04-29 重庆博林生活服务集团有限公司 Brush disc dismounting structure and dismounting method

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DE391517C (en) * 1923-05-05 1924-03-10 Boebel & Schmith Parquet cleaning device
CH268486A (en) * 1948-09-25 1950-05-31 Mueller Bruetsch & Co Machine for cleaning floors.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005045310B3 (en) * 2005-09-16 2007-03-22 Alfred Kärcher Gmbh & Co. Kg Mobile floor cleaning machine
WO2007033719A1 (en) 2005-09-16 2007-03-29 Alfred Kärcher Gmbh & Co. Kg Ride-on floor cleaning machine
DE102008060099B3 (en) * 2008-11-25 2010-07-15 Stein & Co. Gmbh Device for care discs
US20140237743A1 (en) * 2013-02-27 2014-08-28 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology
US10226159B2 (en) * 2013-02-27 2019-03-12 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology
US10251524B2 (en) 2013-02-27 2019-04-09 Tennant Company Cleaning head assemblies having touch-free attachment and alignment technology

Also Published As

Publication number Publication date
DE3766894D1 (en) 1991-02-07
EP0251987A1 (en) 1988-01-07
DE8617171U1 (en) 1986-10-09

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