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EP1806206B1 - Floor grinder - Google Patents

Floor grinder Download PDF

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Publication number
EP1806206B1
EP1806206B1 EP07000050A EP07000050A EP1806206B1 EP 1806206 B1 EP1806206 B1 EP 1806206B1 EP 07000050 A EP07000050 A EP 07000050A EP 07000050 A EP07000050 A EP 07000050A EP 1806206 B1 EP1806206 B1 EP 1806206B1
Authority
EP
European Patent Office
Prior art keywords
drive
belt
gear mechanism
tool
pulley
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.)
Not-in-force
Application number
EP07000050A
Other languages
German (de)
French (fr)
Other versions
EP1806206A1 (en
Inventor
Ruedi Dummermuth-Furter
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.)
Air Tec AG
Original Assignee
Air Tec AG
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Filing date
Publication date
Application filed by Air Tec AG filed Critical Air Tec AG
Publication of EP1806206A1 publication Critical patent/EP1806206A1/en
Application granted granted Critical
Publication of EP1806206B1 publication Critical patent/EP1806206B1/en
Not-in-force legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Definitions

  • the present invention relates to a floor grinding machine according to the preamble of patent claim 1.
  • the present invention now has the object of improving a ground grinder of the type mentioned above, that the advantages of the known floor grinding machines are maintained, but the device is better to use, the mechanical drive parts are protected against contamination and repair and maintenance work easily and without Danger of accidents for the personnel can be carried out.
  • a floor grinder ( Fig. 4 ) as presented on the basis of the invention, always consists of a frame 20 which is equipped with a drawbar 21, with wheels 22 and rollers 23.
  • the rollers 23 serve only to transport the floor grinding machine and can be folded up for the grinding process by means of a hydraulic device on the drawbar, while the wheels 22 are used by the person who operates the floor grinding machine during the grinding process as guidance and weight support.
  • the important parts for the work process are drive 1, housing box 11 and grinding tools 30. These parts are held by the frame 20.
  • the drive 1 is fixed to the frame 20.
  • the housing box 11 is rotatably supported in the frame 20.
  • the tool axes 31 of the grinding tools 30 are arranged eccentrically but at the same radius. All tool axes 31 are rotatably mounted in the housing box 11.
  • the drive of the unit is ensured by the fixed to the frame 20 drive 1 ( Fig. 1 and Fig. 2 ).
  • the drive 1 may be an electric motor, a gasoline engine, a diesel engine or a power unit driven by other energy.
  • the central shaft 12 With the central shaft 12, the extension of the drive shaft of the drive 1, a main drive wheel 2 is firmly connected.
  • the main drive wheel 2 drives a unilaterally grooved drive belt 3.
  • the elevations of the longitudinal grooves on the circumference of the main drive wheel 2 engage in the recesses of the drive belt 3 so that the drive belt 3 as long as it is kept under a certain voltage, can not slip laterally from the main drive wheel 2.
  • the drive belt 3 drives the Gereteantriebsrad 7.
  • the voltage is held by the so-called belt tensioner 6, which in turn has the same creasing.
  • Main drive wheel 2, Gereteantriebsrad 7 and belt tensioner 6 so ensure that the unilaterally longitudinally grooved drive belt 3 does not slip laterally, although the force acting on it could cause this.
  • the longitudinal grooves of the drive belt 3 thus engage in the longitudinal grooves of the main drive wheel 2, the Gereteantechnischsrades 7 and the belt tensioner. 6
  • the drive belt 3 drives the tool drive wheels 4, which are fixedly connected to the tool shafts 31.
  • the wrap angle of the tool drive wheels 4 is extremely large by this construction, which ensures optimum power transmission. Nevertheless, given the choice of a unilaterally grooved drive belt 3 whose other side is flat but also given the opportunity to give the grinding tool 30 at very high resistance a certain amount of slippage. This function acts like a slipping clutch that only works in an emergency, but does not cause any damage when slipping.
  • Both the tool shafts 31 of the grinding tools 30 and the axes of the transmission 5 are rotatably supported in the housing box 11 and mounted ( Fig 1 ). They rotate with the housing box 11 about the central shaft 12.
  • the housing of the transmission 5 is supported by a torque arm 13, which is supported on the housing box 11 ( Fig. 1 ) held against turning.
  • a so-called CYCLO transmission is used.
  • the Gereteabretesrad 8 and the toothed belt 10 are connected by a toothed belt 9.
  • the toothed belt wheel 10 is fixedly connected to the frame 20 of the floor grinding machine.
  • the rotation of the Gereteabretesrades 8 therefore causes the supported by means of torque arm 13 on the housing box 11 gear 5 rotates about the timing pulley 10 and thus about the axis of the central shaft 12. Because the gear 5 is held in the housing box 11, this is set in rotation.
  • the axes of the tool shafts 31, which are also held in the housing box are taken.
  • the magnitude of this rotation is determined by the built-in gear 5 translation.
  • the gear 5 moves with the rotational movement of the housing box 11, so that its weight causes a rotating displacement of the gear 5 eccentric lying center of gravity.
  • the whole drive unit is effectively protected by the housing box 11 against dirt and other external influences.
  • the unit is very compact in this way and the bottom grinding machine becomes much easier to handle thanks to this constructive solution.
  • main drive gear 2 gear drive gear 7, tool drive gear 4, gear output gear 8 and toothed belt wheel, as well as the translation of the cyclo-transmission 5 must be designed accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Massaging Devices (AREA)

Abstract

The grinder has grinding tools (30) eccentrically arranged in a body (11). A drive (1) has a drive shaft firmly connected with a main drive wheel (2). The main drive wheel is engaged with a gear drive wheel (10), tool drive wheel and a belt tensioner (3) in a force-fit manner by a single-sided drive belt. The main drive wheel, gear drive wheel and the belt tensioner are engaged with a drive belt side, which is provided with the longitudinal grooves, in a force-fit manner. The force-fit engagement to the tool drive wheels occurs via a non-grooved backside of the drive belt.

Description

Die vorliegende Erfindung betrifft eine Bodenschleifmaschine gemäss Oberbegriff des Patentanspruchs 1.The present invention relates to a floor grinding machine according to the preamble of patent claim 1.

Bodenschleifmaschinen gemäss Oberbegriff des ersten Patentanspruchs sind seit Jahrzehnten bekannt und bewähren sich im Einsatz. Ein gutes Beispiel für das frühe Erkennen solcher Technik und ihrer Vorteile ist das PatentUS 5 637 032A.Floor grinding machines according to the preamble of the first claim are known for decades and prove themselves in use. A good example of the early recognition of such technology and its advantages is the patent US 5 637 032A.

Gegen Ende des 20. Jahrhunderts hat man sich erneut dieser Technik errinnert und es folgte eine Fülle von Patentanmeldungen, die auch zu erteilten Patenten führten. Es erscheint dem Anmelder deshalb sinnvoll Patentanmeldungen die anlässlich einer Recherche gefunden und als relevant erachtet wurden anzugeben: US 6,783,447 ; US 5,637,032 ; US 6,540,596 und US 6,331,138 . Diese Liste ist nicht vollständig, gibt aber die als wichtig erachteten Schriften an.At the end of the twentieth century, this technique was remembered again, and a wealth of patent applications followed, which also resulted in granted patents. It therefore appears to the applicant to indicate patent applications which were found during a search and were considered relevant: US 6,783,447 ; US 5,637,032 ; US 6,540,596 and US 6,331,138 , This list is not exhaustive, but states the writings considered important.

Die vorliegenden Schriften zeigen klare Nachteile. So ist z.B. bei US 6,783,447 die Tatsache, dass drei Riementriebe verwendet werden nachteilig, indem mehr Platz beansprucht wird, wodurch das Gerät unförmig wird. Zudem ist das Getriebe als Zusatzgewicht exzentrisch angeordnet und ergibt ein für den Schleifprozess nachteiliges Ungleichgewicht des Gerätes. Ungleichgewicht eines solchen Gerätes erzeugt immer eine einseitige Krafteinleitung in die Schleifwerkzeuge, was sich beim Führen eines solchen Gerätes darin zeigt, dass die Maschine "zur Seite driftet" und gegen dieses "Ausbrechen" gehalten werden muss. Ein weiterer Nachteil statisch exzentrischer Belastung auf die Schleifwerkzeuge betrifft den Schleifprozess. Die Schleifwerkzeuge werden je nach deren Lage mit mehr oder weniger Gewicht belastet, was auch in einem ungleichen Schleifbild zum Ausdruck kommt. Diese Nachteile weist auch die US 6,540,596 auf, die mit zwei Antriebsmotoren arbeitet.The present documents show clear disadvantages. For example, at US 6,783,447 the fact that three belt drives are used adversely by taking up more space, making the device less bulky. In addition, the transmission is an additional weight arranged eccentrically and results in a negative for the grinding process imbalance of the device. Imbalance of such a device always produces a one-sided force in the grinding tools, which is shown in the guide of such a device in that the machine "drifts sideways" and must be kept against this "breaking out". Another disadvantage of static eccentric loading on the grinding tools relates to the grinding process. Depending on their position, the grinding tools are loaded with more or less weight, which is reflected in an uneven sanding pattern. These disadvantages are also the US 6,540,596 that works with two drive motors.

Eine andere Situation findet sich bei der US 5,637,032 . Der Flachriemen, der wie in Fig 2b sowohl das grosse Rad umschlingt, als auch die kleinen Werkzeugantriebsräder bedient steht unter gewaltiger Spannung. Dessen Auswechslung ist im höchsten Masse unfallgefährlich für die ausführenden Personen. Ein weiterer Nachteil, der teilweise durch eine erhöhte Spannung eben dieses Flachriemens kompensiert wird, ist der ausserordentlich kleine Umschlingungswinkel der Schleifwerkzeugantriebswellen 8c.Another situation can be found in the US 5,637,032 , The flat belt, like in Fig. 2b both the big wheel wraps around and the small tool drive wheels are under tremendous strain. Its substitution is extremely dangerous for the executing persons. Another disadvantage, which is partially compensated by an increased tension just this flat belt, is the exceptionally small wrap angle of the grinding tool drive shafts 8c.

Geräte die nach den beschriebenen Konstruktionsprinzipien gebaut werden, sind auf dem Markt und werden auch verkauft. Sie sind mit den oben ausgeführten Mängeln behaftet.Devices that are built according to the described design principles are on the market and are also sold. You are subject to the above mentioned defects.

Die vorliegende Erfindung stellt sich nunmehr die Aufgabe ein Bodenschleifgerät der eingangs genannten Art derart zu verbessern, dass die Vorteile der bekannten Bodenschleifmaschinen erhalten bleiben, das Gerät aber besser bedienbar wird, die mechanischen Antriebsteile sicher gegen Verschmutzung geschützt sind und die Reparatur und Unterhaltsarbeiten einfach und ohne Unfallgefahr für das Personal durchgeführt werden können.The present invention now has the object of improving a ground grinder of the type mentioned above, that the advantages of the known floor grinding machines are maintained, but the device is better to use, the mechanical drive parts are protected against contamination and repair and maintenance work easily and without Danger of accidents for the personnel can be carried out.

Diese Aufgabe löst eine Bodenbearbeitungsmaschine mit den Merkmalen des Patentanspruches 1. Weitere erfindungsgemässe Merkmale gehen aus den abhängigen Ansprüchen hervor und deren Vorteile sind in der nachfolgenden Beschreibung erläutert.This object is achieved by a soil tillage machine with the features of claim 1. Further features of the invention will become apparent from the dependent claims and the advantages thereof are explained in the following description.

In der Zeichnung zeigt:

Fig 1
Schnitt durch die Bodenschleifmaschine
Fig 2
Aufsicht auf den Antrieb der Werkzeuge
Fig 3
Aufsicht auf den Antrieb des Gehäusekastens
Fig 4
Ansicht der Bodenschleifmaschine
In the drawing shows:
Fig. 1
Cut through the floor grinder
Fig. 2
Supervision on the drive of the tools
Fig. 3
Supervision of the drive of the housing box
Fig. 4
View of the floor grinder

Die Figuren stellen bevorzugte Ausführungsvorschläge dar, welche in der nachfolgenden Beschreibung als Beispiele erläutert werden.The figures represent preferred embodiments, which will be explained in the following description as examples.

Eine Bodenschleifmaschine (Fig 4) wie sie aufgrund der Erfindung vorgestellt wird, besteht immer aus einem Rahmen 20 der mit einer Deichsel 21, mit Rädern 22 und und Rollen 23 ausgerüstet ist. Die Rollen 23 dienen nur dem Transport der Bodenschleifmaschine und können für den Schleifprozess mittels einer Hydraulischen Vorrichtung an der Deichsel hochgeklappt werden, während die Räder 22 von der Person, welche die Bodenschleifmaschine bedient, während des Schleifprozesses als Führung und Gewichtsabstützung dienen.A floor grinder ( Fig. 4 ) as presented on the basis of the invention, always consists of a frame 20 which is equipped with a drawbar 21, with wheels 22 and rollers 23. The rollers 23 serve only to transport the floor grinding machine and can be folded up for the grinding process by means of a hydraulic device on the drawbar, while the wheels 22 are used by the person who operates the floor grinding machine during the grinding process as guidance and weight support.

Die für den Arbeitsprozess wichtigen Teile sind Antrieb 1, Gehäusekasten 11 und Schleifwerkzeuge 30. Diese Teile werden vom Rahmen 20 gehalten. Der Antrieb 1 ist fest mit dem Rahmen 20 verbunden. Der Gehäusekasten 11 ist im Rahmen 20 drehbar gehalten. In diesem rotierenden Gehäusekasten 11 sind die Werkzeugachsen 31 der Schleifwerkzeuge 30 exzentrisch aber auf demselben Radius angeordnet. Alle Werkzeugachsen 31 sind im Gehäusekasten 11 drehbar gelagert.The important parts for the work process are drive 1, housing box 11 and grinding tools 30. These parts are held by the frame 20. The drive 1 is fixed to the frame 20. The housing box 11 is rotatably supported in the frame 20. In this rotating housing box 11, the tool axes 31 of the grinding tools 30 are arranged eccentrically but at the same radius. All tool axes 31 are rotatably mounted in the housing box 11.

Der Antrieb der Einheit wird durch den mit dem Rahmen 20 fest verbundenen Antrieb 1 gewährleistet (Fig 1 und Fig 2). Der Antrieb 1 kann ein Elektromotor, ein Benzinmotor, ein Dieselmotor oder ein mit anderer Energie angetriebenes Antriebselement sein. Mit der Zentralwelle 12, der Verlängerung der Antriebswelle des Antriebes 1, ist ein Hauptantriebsrad 2 fest verbunden. Dieses Hauptantriebsrad 2 treibt einen einseitig gerillten Antriebsriemen 3. Die Erhebungen der Längsrillen am Umfang des Hauptantriebsrades 2 greifen derart in die Vertiefungen des Antriebsriemens 3, dass der Antriebsriemen 3 solange er unter einer gewissen Spannung gehalten wird, seitlich nicht vom Hauptantriebsrad 2 abrutschen kann. Mit derselben Eingriffsart treibt der Antriebsriemen 3 das Getriebeantriebsrad 7. Die Spannung wird durch den sogenannten Riemenspanner 6 gehalten, der seinerseits dieselbe Rillung aufweist. Hauptantriebsrad 2, Getriebeantriebsrad 7 und Riemenspanner 6 sorgen so dafür, dass der einseitig längsgerillte Antriebsriemen 3 seitlich nicht abrutscht, obwohl die auf ihn einwirkende Schwerkraft dies verursachen könnte. Die Längsrillen des Antriebsriemens 3 greifen also in die Längsrillen des Hauptantriebsrades 2, des Getriebeantriebsrades 7 und des Riemenspanners 6.The drive of the unit is ensured by the fixed to the frame 20 drive 1 ( Fig. 1 and Fig. 2 ). The drive 1 may be an electric motor, a gasoline engine, a diesel engine or a power unit driven by other energy. With the central shaft 12, the extension of the drive shaft of the drive 1, a main drive wheel 2 is firmly connected. The main drive wheel 2 drives a unilaterally grooved drive belt 3. The elevations of the longitudinal grooves on the circumference of the main drive wheel 2 engage in the recesses of the drive belt 3 so that the drive belt 3 as long as it is kept under a certain voltage, can not slip laterally from the main drive wheel 2. With the same mode of engagement, the drive belt 3 drives the Getriebeantriebsrad 7. The voltage is held by the so-called belt tensioner 6, which in turn has the same creasing. Main drive wheel 2, Getriebeantriebsrad 7 and belt tensioner 6 so ensure that the unilaterally longitudinally grooved drive belt 3 does not slip laterally, although the force acting on it could cause this. The longitudinal grooves of the drive belt 3 thus engage in the longitudinal grooves of the main drive wheel 2, the Getriebeantriebsrades 7 and the belt tensioner. 6

Mit der nicht gerillten Rückseite des Antriebsriemens 3 werden die Schleifwerkzeuge 30 angetrieben. Der Antriebsriemen 3 treibt die Werkzeugantriebsräder 4, welche mit den Werkzeugwellen 31 fest verbunden sind. Der Umschlingungswinkel der Werkzeugantriebsräder 4 wird durch diese Konstruktion ausserordentlich gross, was eine optimale Kraftübertragung gewährleistet. Trotzdem ist durch die Wahl eines einseitig gerillten Antriebsriemens 3 dessen andere Seite aber flach ist auch die Möglichkeit gegeben, dem Schleifwerkzeug 30 bei sehr grossem Widerstand einen gewissen Schlupf zu gewähren. Diese Funktion wirkt wie eine Rutschkupplung die nur im Notfall wirkt, aber beim Rutschen keine Schäden verursacht.With the non-grooved back of the drive belt 3, the grinding tools 30 are driven. The drive belt 3 drives the tool drive wheels 4, which are fixedly connected to the tool shafts 31. The wrap angle of the tool drive wheels 4 is extremely large by this construction, which ensures optimum power transmission. Nevertheless, given the choice of a unilaterally grooved drive belt 3 whose other side is flat but also given the opportunity to give the grinding tool 30 at very high resistance a certain amount of slippage. This function acts like a slipping clutch that only works in an emergency, but does not cause any damage when slipping.

Sowohl die Werkzeugwellen 31 der Schleifwerkzeuge 30 als auch die Achsen des Getriebes 5 sind im Gehäusekasten 11 drehbar gehalten und gelagert (Fig 1). Sie drehen sich mit dem Gehäusekasten 11 um die Zentralwelle 12. Das Gehäuse des Getriebes 5 wird durch eine Drehmomentstütze 13, die sich am Gehäusekasten 11 abstützt (Fig 1) gegen das Drehen gehalten. Dadurch kann die über das Getriebeantriebsrad 7 eingebrachte Drehzahl durch das Getriebe 5 übersetzt und auf das Getriebeabtriebsrad 8 übertragen werden. Um auf dem sehr kleinen zur Verfügung stehenden Raum diese Übersetzung überhaupt möglich zu machen, wird ein sogenanntes CYCLO-Getriebe verwendet.Both the tool shafts 31 of the grinding tools 30 and the axes of the transmission 5 are rotatably supported in the housing box 11 and mounted ( Fig 1 ). They rotate with the housing box 11 about the central shaft 12. The housing of the transmission 5 is supported by a torque arm 13, which is supported on the housing box 11 ( Fig. 1 ) held against turning. As a result, the speed introduced via the transmission drive gear 7 can be translated by the transmission 5 and transmitted to the transmission output gear 8. In order to make this translation possible on the very small available space, a so-called CYCLO transmission is used.

Das Getriebeabtriebsrad 8 und das Zahnriemenrad 10 sind durch einen Zahnriemen 9 verbunden. Das Zahnriemenrad 10 ist mit dem Rahmen 20 der Bodenschleifmaschine fest verbunden. Die Drehung des Getriebeabtriebsrades 8 bewirkt deshalb, dass sich das mittels Drehmomentstütze 13 am Gehäusekasten 11 abgestütze Getriebe 5 um das Zahnriemenrad 10 und damit um die Achse der Zentralwelle 12 dreht. Weil das Getriebe 5 im Gehäusekasten 11 gehalten ist, wird dieser in Rotation versetzt. Die Achsen der Werkzeugwellen 31, die ebenfalls im Gehäusekasten gehalten sind werden mitgenommen. So drehen sich mit dem Getriebekastn 11 auch die Schleifwerkzeuge 30 um die Achse der Zentralwelle 12, was für den Schleifprozess entscheidend ist. Die Grössenordnung dieser Drehung wird durch die im Getriebe 5 eingebaute Übersetzung bestimmt. Das Getriebe 5 wandert mit der Drehbewegung des Gehäusekastens 11 mit, so dass dessen Gewicht eine rotierende Verlagerung des durch das Getriebe 5 exzentrisch liegenden Schwerpunktes bewirkt.The Getriebeabtriebsrad 8 and the toothed belt 10 are connected by a toothed belt 9. The toothed belt wheel 10 is fixedly connected to the frame 20 of the floor grinding machine. The rotation of the Getriebeabtriebsrades 8 therefore causes the supported by means of torque arm 13 on the housing box 11 gear 5 rotates about the timing pulley 10 and thus about the axis of the central shaft 12. Because the gear 5 is held in the housing box 11, this is set in rotation. The axes of the tool shafts 31, which are also held in the housing box are taken. Thus, with the Getriebekastn 11 and the grinding tools 30 rotate about the axis of the central shaft 12, which is for the Grinding process is crucial. The magnitude of this rotation is determined by the built-in gear 5 translation. The gear 5 moves with the rotational movement of the housing box 11, so that its weight causes a rotating displacement of the gear 5 eccentric lying center of gravity.

Die ganze Antriebseinheit ist durch den Gehäusekasten 11 gegen Schmutz und andere äussere Einflüsse wirkungsvoll geschützt. Die Einheit ist auf diese Weise sehr kompakt und die Bodenschleifmaschine wird um einiges handlicher durch diese konstruktive Lösung.The whole drive unit is effectively protected by the housing box 11 against dirt and other external influences. The unit is very compact in this way and the bottom grinding machine becomes much easier to handle thanks to this constructive solution.

Man versucht für diese Bodenschleifmaschinen diese Drehzahlen zu erreichen: Zentralwelle 12 1'500 oder 3'000 rpm Schleifwerkzeuge 30 500 bis 1'000 rpm Gehäuse 11 30 bis 80 rpm One tries to reach these speeds for these floor grinding machines: Central shaft 12 1'500 or 3'000 rpm Grinding tools 30 500 to 1'000 rpm Housing 11 30 to 80 rpm

Die Durchmesser von Hauptantriebsrad 2, Getriebeantriebsrad 7, Werkzeugantriebsrad 4, Getriebeabtriebsrad 8 und Zahnriemenrad, sowie die Übersetzung des Cyclo-Getriebes 5 müssen entsprechend ausgelegt werden.The diameters of main drive gear 2, gear drive gear 7, tool drive gear 4, gear output gear 8 and toothed belt wheel, as well as the translation of the cyclo-transmission 5 must be designed accordingly.

Claims (3)

  1. Floor sanding machine having a case body (11) and a plurality of grinding tools (30) arranged eccentrically in the case body (11) with tool shafts (31), in conjunction with which the axes of the tool shafts (31) are rotatably mounted about the axis of a central shaft (12) and the sanding tools (30) are rotatably mounted about the axis of the tool shaft (31), characterized in that the drive shaft of a drive (1) is rigidly connected via a central axis (12) to a main drive pulley (2), the main drive pulley (2) being maintained in positive engagement by means of a unilaterally and longitudinally grooved drive belt (3) with a gear mechanism drive pulley (10), tool drive pulleys (4) and a belt tensioner (6), the positive engagement being effected on the main drive pulley (2), the gear mechanism drive pulley (7) and the belt tensioner (6) via the side of the drive belt (3) provided with longitudinal grooves, and the positive engagement on the tool drive pulleys (4) being effected via the non-grooved rear side of the drive belt (3).
  2. Floor sanding machine according to Claim 1, characterized in that a gear mechanism (5) connected to the gear mechanism drive pulley (7) is a Cyclo gear mechanism, and in that this gear mechanism (5) is retained and supported rotatably in the case body (11), the case body of the gear mechanism (5) being prevented from rotating by a torque arm (13) bearing against the case body (11).
  3. Floor sanding machine according to Claims 1 and 2, characterized in that a gear mechanism output pulley (8) is in positive and non-positive engagement via a toothed belt (9) with a toothed belt pulley (10), and in that the toothed belt pulley (10) is securely attached to the frame (20) .
EP07000050A 2006-01-10 2007-01-03 Floor grinder Not-in-force EP1806206B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH332006 2006-01-10

Publications (2)

Publication Number Publication Date
EP1806206A1 EP1806206A1 (en) 2007-07-11
EP1806206B1 true EP1806206B1 (en) 2008-08-13

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Application Number Title Priority Date Filing Date
EP07000050A Not-in-force EP1806206B1 (en) 2006-01-10 2007-01-03 Floor grinder

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US (1) US7393267B2 (en)
EP (1) EP1806206B1 (en)
AT (1) ATE404324T1 (en)
DE (1) DE502007000070D1 (en)

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DE502007000070D1 (en) 2008-09-25
EP1806206A1 (en) 2007-07-11
ATE404324T1 (en) 2008-08-15
US20070184762A1 (en) 2007-08-09
US7393267B2 (en) 2008-07-01

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