Surface cleaning machine

Abstract

A surface cleaning machine is provided, comprising a cleaning head (14) with a driven cleaning roller unit (18) with a rotation axis (58), wherein in a cleaning operation the surface cleaning machine is supported on the surface (16) to be cleaned via the cleaning roller unit (272) and a further support device (292), a drive motor (28) for the cleaning roller unit (18), and a dirty fluid tank device (66) which is detachably arranged on the cleaning head (14).

Description

[0001] This application is a divisional application of European patent application No. 17 709 650.0 filed on 8 March 2017, to which reference is made in its entirety.

[0002] The invention relates to a surface cleaning machine comprising a cleaning head with a driven cleaning roller unit with a rotation axis.

[0003] A surface cleaning machine with rotating brushes is known from WO 2010 / 041185 A1.

[0004] A cleaning head for a floor cleaning machine is known from US 7,665,174 B2.

[0005] From US 4,173,054 a floor cleaner is known which comprises a handle, a main body, a roller mechanism with a roller with a cleaning belt, a scraper and a dirt fluid receptacle.

[0006] WO 2013 / 106762 A2 discloses a surface cleaning machine with a cleaning roller and a drive unit for driving the cleaning roller. A dirt tray is provided into which the cleaning roller sweeps dirt during rotation. The dirt tray can be opened.

[0007] From US 7,921,497 B2 a floor scrubber is known which is manually operated and comprises a drive roller which is coupled to a scrubbing roller.

[0008] Surface cleaning machines are known from the unpublished applications PCT / EP2015 / 073275, PCT / EP2015 / 072929, PCT / EP2015 / 073529, PCT / EP2015 / 073116, and PCT / EP2015 / 073478. A surface cleaning machine is also known from the unpublished application PCT / EP2015 / 073315.

[0009] From US 4,875,246 a portable floor cleaning device is known which has a roller driven by an electric motor.

[0010] From DE 20 2009 013 434 U1 a device for wet cleaning floors with a brush which can be rotated about a rotation axis is known.

[0011] A cleaning machine is known from CN 201 197 698 Y.

[0012] From US 6,026,529 a device for cleaning floors or other hard surfaces is known.

[0013] From WO 2005 / 087075 A1 a floor cleaning machine with a handle is known which is pivotably arranged on a base.

[0014] Another floor cleaning machine is known from WO 2015 / 086083 A1.

[0015] A hard floor cleaning device is known from US 3,789,449.

[0016] The invention is based on the object of providing a surface cleaning machine of the type mentioned above, which delivers optimized cleaning results while being easy to use.

[0017] This object is achieved according to the invention in the surface cleaning machine mentioned at the outset in that, during cleaning operation, the surface cleaning machine is supported on a surface to be cleaned via the cleaning roller unit and a further support device, a drive motor is provided for the cleaning roller unit, and a dirt fluid tank device is provided which is removably arranged on the cleaning head.

[0018] The further support device is, for example, a roller unit with one or more rollers and in particular with one or more cleaning rollers (such as with one or more sweeping rollers), and / or the support device is at least one roller or comprises a roller, and / or the support device is at least one sliding element or comprises such. This allows additional support to be formed. In particular, a self-propelled and self-steering cleaning head can be realized in a simple manner. The support device can provide the travel drive (fully or partially). The support device can also be used for a travel drive or an additional travel drive of the cleaning head. It can also be designed for additional or sole steering of the cleaning head.

[0019] The cleaning roller unit comprises or is a single-piece or multi-piece cleaning roller with a single rotation axis. In a multi-piece cleaning roller unit, all subunits have the same coaxial rotation axis. During cleaning operation, all subunits rotate around the same rotation axis in the same direction at the same rotation speed. The drive motor drives all subunits.

[0020] A removable dirt fluid tank device on the cleaning head allows the path for dirt fluid from the cleaning roller unit to the dirt fluid tank device to be kept short, so that easy coupling is possible.

[0021] The dirt fluid tank assembly's detachability from the cleaning head allows for easy emptying and cleaning. It can hold a large amount of dirt fluid, including liquid. In particular, the dirt fluid tank assembly can be removed from the cleaning head as a whole or inserted into it as a whole, allowing the dirt fluid tank assembly to be filled to a high level, even with liquid.

[0022] This even makes it possible to couple dirty fluid from the cleaning roller unit to the dirty fluid tank device without the need for a suction fan, or a suction fan can be provided for support, which has a relatively low power requirement and therefore a relatively low energy requirement.

[0023] This allows the surface cleaning machine to be operated in an energy-efficient manner. This, in turn, makes it possible to supply the surface cleaning machine, and in particular the drive motor, with electrical power using a battery system, preferably rechargeable. This allows the surface cleaning machine to be operated independently of a mains power source.

[0024] It is advantageous if the cleaning roller unit is or includes a wiping roller unit. This allows for wet cleaning, especially on hard floors. In particular, the wiping roller unit is moistened, and the rotation of the wiping roller unit then moistens the floor to be cleaned accordingly, loosening dirt and mechanically removing it and carrying it away.

[0025] In one embodiment, the cleaning roller unit comprises a wiping roller unit and a sweeping roller unit. The arrangement is particularly such that the sweeping roller unit is positioned upstream of the wiping roller unit during normal cleaning operation. This allows a sweeping operation to be performed, in particular, before a wiping operation on a surface to be cleaned. The sweeping roller unit can, in particular, provide additional support for the cleaning head on the surface to be cleaned.

[0026] It is advantageous if the surface cleaning machine is supported on the surface to be cleaned via the wiping roller unit and the sweeping roller unit during cleaning. This makes it easy to create, for example, a self-propelled and self-steering cleaning head ("cleaning robot") that can perform both sweeping and (wet) wiping on the surface to be cleaned.

[0027] It is advantageous if the dirt-fluid tank system includes a shared receptacle (a shared container) for sweeping debris from the sweeping roller unit and for dirt-fluid from the wiping roller unit. The dirt-fluid tank system allows the corresponding amount of dirt-fluid to be collected from the area to be cleaned.

[0028] Alternatively, the dirt fluid tank system can also be provided with separate receptacles for sweepings from the sweeping roller unit and for dirt fluid from the wiping roller unit. For example, a separate receptacle can be provided for dry dirt fluid (for sweepings) and for wet dirt fluid (for dirt fluid from the wiping roller unit).

[0029] In particular, one or more receptacles (receivers) of the dirt fluid tank unit are detachably positioned on the cleaning head between the sweeping roller unit and the wiping roller unit. This results in a space-saving design of the cleaning head. This can be implemented, in particular, as self-propelled and self-steering units.

[0030] It is advantageous if the cleaning roller unit comprises one or more cleaning rollers or partial cleaning rollers driven by the same drive motor, with different cleaning rollers or partial cleaning rollers having the same or differently oriented rotation axes. This results in optimized operating options, particularly for a self-propelled and self-steering cleaning head. With differently oriented rotation axes, steerability can be easily achieved, for example, via different controls regarding the rotation speed and / or direction of rotation.

[0031] It is advantageous if a longitudinal axis of the dirty fluid tank device is oriented parallel to the (especially sole) rotational axis of the cleaning roller unit. The longitudinal axis of the dirty fluid tank device runs between a first end face and a second, opposite end face of the dirty fluid tank device. It defines the longest extension of the dirty fluid tank device. This results in a space-saving arrangement of the dirty fluid tank device on the cleaning head.

[0032] It is also advantageous if a motor axis of the drive motor is oriented transversely and, in particular, perpendicularly to a longitudinal axis of the dirty fluid tank device. The motor axis of the drive motor corresponds to a rotor axis of the drive motor. The transverse orientation to the longitudinal axis of the dirty fluid tank device results in a space-saving design.

[0033] It is particularly advantageous if the dirty fluid tank device is located between the cleaning roller unit and the drive motor. This results in a short coupling path for coupling the dirty fluid from the cleaning roller unit into the dirty fluid tank device. This, in turn, makes it sufficient to use a suction fan with a relatively low power to extract the dirty fluid, or a suction fan-free design is possible.

[0034] In one embodiment, a gear device for torque transmission is provided, which is arranged between the drive motor and the cleaning roller unit, wherein the dirty fluid tank device has an upper side and a lower side, wherein the lower side faces a cleaning roller holder of the cleaning roller unit and the upper side faces away from the lower side, and wherein the gear device is guided past the lower side or the upper side of the dirty fluid tank device. The gear device ensures the torque transmission from the drive motor to the cleaning roller unit. The cleaning roller unit is positioned at a distance from the drive motor. The gear device ensures, in particular, speed reduction, torque deflection, and, if necessary, bridging of distances.By routing the gear unit along the bottom or top of the dirty fluid tank, a simple, compact design is achieved. In principle, it is also possible for the gear unit to be routed through a continuous opening in the dirty fluid tank. By routing the gear unit along the bottom or top, this results in easier removal of the dirty fluid tank from the cleaning head and a simplified design of the dirty fluid tank.

[0035] In one embodiment, the dirty fluid tank device has a recess in which, when the dirty fluid tank device is fixed to the cleaning head, at least a portion of the gear device is positioned. The corresponding clearance of the recess provides a space in which the gear device can be positioned. This results in an optimized adaptation of the geometric shape of the dirty fluid tank device to the cleaning head.

[0036] In one embodiment, a device body is provided on which the cleaning head is arranged, wherein at least one of the following devices is positioned on the device body: a tank device for cleaning fluid; a valve device for supplying cleaning fluid to the cleaning head; a battery device for the drive motor; a holding rod device for holding and / or guiding the surface cleaning machine; a filter device for cleaning fluid; and at least partially the drive motor. This results in a compact design. In particular, elements of the surface cleaning machine which have a relatively high weight, such as the drive motor, can be positioned far down near the cleaning head. Furthermore, a removable tank device for cleaning fluid can be positioned on the device body.A valve device for supplying cleaning fluid to the cleaning head and a filter device for the cleaning fluid can be positioned on the device body, particularly in a protected manner within the housing. Furthermore, the battery device can be optimally positioned, especially if the drive motor itself is located on the device body. It can also be provided that the drive motor is at least partially positioned within the device body. For example, the device body is used to "anchor" the drive motor to the surface cleaning machine.

[0037] It is advantageous if the drive motor is arranged at least partially between the device body and the cleaning head, wherein it is in particular arranged at least partially within the device body. This allows, for example, a battery device to be arranged on the device body in an optimized manner. Furthermore, torque can be transmitted from the drive motor to the cleaning roller unit on the cleaning head in a simple manner. The drive motor can be arranged relatively low (relative to proper operation with the cleaning roller unit resting on the surface to be cleaned), resulting in simple operation. With such an arrangement, pivoting between the cleaning head and the device body can also be easily achieved.

[0038] It is advantageous if the cleaning head can be pivoted about a pivot axis relative to the drive motor and / or the device body, wherein the pivot axis is oriented in particular parallel or coaxially to a motor axis of the drive motor. This results in expanded operating options; access to spatially restricted areas of the surface to be cleaned is improved, since the device body can be repositioned to suit the cleaning head. A corresponding pivot bearing can be easily constructed, for example, by encapsulating the drive motor as an inner sleeve and arranging an outer sleeve on the device body in such a way that a pivot bearing is realized.

[0039] In one embodiment, a cleaning roller holder on which the cleaning roller unit is positioned has a receiving chamber with a receiving space for the dirty fluid tank device. The receiving chamber can be configured with multiple chambers, and the receiving space can comprise several sub-chambers. In principle, the sub-chambers can be fluidically connected to one another or fluidically separated from one another.

[0040] In particular, the receiving chamber is assigned a fixing device by means of which the dirty fluid tank device can be fixed to the receiving chamber. The fixing device is designed to be detachable for the removal of the dirty fluid tank device from the cleaning head. In particular, the fixing device is designed such that the dirty fluid tank device is held in a holding position on the receiving chamber by a positive fit. This allows the dirty fluid tank device to be fixed to the receiving chamber in a simple manner. Furthermore, the dirty fluid tank device can be easily removed in order to empty it and, if necessary, to clean it. Furthermore, the fixing device can be designed such that the dirty fluid tank device is positioned with an inlet opening defined relative to the cleaning roller unit.In particular, a stripping guide device can thereby be positioned in a defined manner relative to the cleaning roller unit.

[0041] In a structurally simple embodiment, the fixing device comprises or is at least one pivotable flap. The pivotable flap allows the receiving chamber to be easily exposed such that the dirty fluid tank device can be inserted or removed. The flap, when it acts on the dirty fluid tank device, can also secure a holding position of the dirty fluid tank device. Furthermore, the flap can be designed such that it exerts a certain pretension in order to position the dirty fluid tank device in a defined manner on the receiving chamber, in particular in order to position an inlet opening of the dirty fluid tank device and / or optionally a scraper guide device in a defined manner relative to the cleaning roller unit.

[0042] Advantageously, a pivot axis of the at least one flap is aligned at least approximately parallel to a rotation axis of the cleaning roller unit. This results in a simple structural design. The dirty fluid tank unit can be easily removed and reinserted.

[0043] It is advantageous if the at least one flap acts on an upper side of the dirty fluid tank device, which is opposite a lower side, wherein the lower side of the dirty fluid tank device faces a floor of the receiving chamber when the dirty fluid tank device is fixed to the cleaning head. This makes it easy to secure a holding position of the dirty fluid tank device on the receiving chamber. Furthermore, a defined positioning can be achieved.

[0044] It is advantageous if the at least one flap is designed as a hold-down device, which positions the dirty fluid tank device in a defined manner relative to the cleaning roller unit and / or in the receiving space, and in particular presses the dirty fluid tank device against a floor of the receiving chamber in a holding position. This allows an operator to easily remove and reinsert the dirty fluid tank device, and effectively achieves automatic positioning; the operator does not have to worry about the precise positioning.

[0045] For example, the at least one flap is spring-loaded and / or elastically designed such that the dirty fluid tank device is held in the receiving space with a preload. This preload ensures that the inlet opening of the dirty fluid tank device is in a defined position relative to the cleaning roller unit.

[0046] In a structurally simple embodiment, at least one recess is arranged on the top side of the dirty fluid tank device, and the at least one flap has at least one counter element for inserting into the at least one recess. This makes it particularly easy to block the mobility of the dirty fluid tank device at the receiving chamber in a removal direction.

[0047] It is further advantageous if the at least one recess has at least one undercut, and the at least one counter element has a locking element adapted to the at least one undercut, which, when at least one flap is closed, blocks the movement of the dirty fluid tank device in a direction away from a floor of the receiving chamber. This allows for a positive fit, which prevents the dirty fluid tank device from falling out when in the holding position. Furthermore, this allows for a simple positioning of the dirty fluid tank device relative to the cleaning roller unit.

[0048] In particular, the receiving chamber and the dirty fluid tank device are configured to be adapted to one another in such a way that, when the dirty fluid tank device is in a holding position on the receiving chamber, the dirty fluid tank device's mobility transverse to a vertical line of a floor of the receiving chamber is blocked. This provides a simple fixation. The floor then blocks the mobility parallel to the vertical line of the floor, and the flap blocks the mobility in the opposite direction.

[0049] In one embodiment, the dirty fluid tank device has one or more hinged lids. By opening the hinged lid, the dirty fluid tank device can be emptied and, if necessary, easily cleaned. The hinged lid forms, in particular, an upper side of the dirty fluid tank device, on which the at least one flap of the fixing device can act.

[0050] In one embodiment, the dirty fluid tank device is designed as a unit. This can comprise one or more chambers. It can be removed from the cleaning head as a whole or inserted into it. It is also possible in principle for the dirty fluid tank device to have separate subunits that can be individually removed from the cleaning head or inserted into it.

[0051] In one embodiment, the cleaning roller unit is constructed in two parts (is a two-part cleaning roller) with a first part and a second part, wherein a first chamber of the dirty fluid tank device is assigned to the first part of the cleaning roller unit and a second chamber of the dirty fluid tank device is assigned to the second part of the cleaning roller unit, and in particular the drive motor acts on a central region which lies between the first part and the second part. The central region is, for example, the central region of a shaft. This results in a space-saving and structurally simple design for the torque transmission from the drive motor to the cleaning roller unit with the (exactly one) axis of rotation. In particular, the drive motor can be positioned such that its motor axis lies transversely to the axis of rotation of the cleaning roller unit.

[0052] It is advantageous to provide a scraper-guide device for the dirty fluid, which acts on the cleaning roller unit and is located at an inlet opening of the dirty fluid tank unit. The scraper-guide device allows dirt to be removed from the cleaning roller unit, and the removed dirt can be coupled, in particular, into the dirty fluid tank unit via the inlet opening.

[0053] In particular, the stripping guide device is arranged and configured such that the dirty fluid entrained by the cleaning roller unit is detached from the cleaning roller unit by stripping and directed to the inlet opening of the dirty fluid tank device. The coupling of dirty fluid at the inlet opening into the dirty fluid tank device can occur at least partially via an impact effect or through the action of centrifugal force. Dirt fluid can be at least partially propelled into the dirty fluid tank device via the stripping guide device at the inlet opening.

[0054] It is particularly advantageous if the scraper guide device is designed in such a way that the dirty fluid is guided through the scraper guide device at the inlet opening of the dirty fluid tank device into the dirty fluid tank device without the need for a suction fan. The scraper guide device is then arranged, in particular, directly at the inlet opening of the dirty fluid tank device. In particular, the scraper guide device itself then forms a wall of the inlet opening. This results in a structurally simple design of the surface cleaning machine overall, since no suction fan with fan motor, vacuum lines, and the like are required. Furthermore, no separator is required.

[0055] It is also advantageous if the scraper guide device is arranged downstream of the inlet opening relative to the direction of rotation of the cleaning roller unit. This allows the dirty fluid to be released from the cleaning roller unit via a scraper effect and directed into the dirty fluid tank device.

[0056] It is particularly advantageous if the scraper guide device extends into a section of the cleaning roller unit. This allows the dirty fluid to be removed from the cleaning roller unit via a scraper effect.

[0057] It is advantageous if the stripping guide device is rounded or chamfered on an edge that extends into the trim of the cleaning roller unit and faces the inlet opening. This protects the trim fibers. Furthermore, the rotary drive of the cleaning roller unit can be operated in an energy-efficient manner.

[0058] It is then particularly advantageous if the scraper guide device protrudes into the stock to a depth of at least 5% of the thickness of the stock, based on a moist stock.

[0059] It is fundamentally possible for the stripping guide device to be mounted on a cleaning roller holder. In one embodiment, the stripping guide device is mounted on the dirty fluid tank unit and can be removed from the cleaning head together with the dirty fluid tank unit. When the dirty fluid tank unit is positioned at a holding position on the cleaning head, the stripping guide device is automatically positioned "correctly" relative to the cleaning roller unit.

[0060] In particular, the stripping guide device is formed by one or more edge elements, i.e., by one or more strips having corresponding edges that can, in particular, extend into the lining of the cleaning roller unit. Preferably, an edge element at least partially forms a wall of the inlet opening.

[0061] It is also advantageous if a sweeping element is arranged on the cleaning head, by means of which coarse dirt can be fed to the cleaning roller unit for removal by the cleaning roller unit.

[0062] In particular, an inlet opening of the dirt fluid tank unit is positioned between the scraper guide unit and the sweeping element. This allows coarse dirt, which has been fed to the cleaning roller unit via the sweeping element, to be carried along by the cleaning roller unit and scraped off by the scraper guide unit.

[0063] It is particularly advantageous if a battery system, especially a rechargeable battery system, is provided to supply the drive motor with electrical energy. This allows the surface cleaning machine to be operated independently of the mains power supply, resulting in ease of use.

[0064] It is also advantageous if the drive motor is located between the battery unit and the cleaning head. This results in optimized positioning of the battery unit.

[0065] It is also advantageous to provide a tank for cleaning fluid. This allows the surface to be cleaned to be moistened directly or indirectly (by moistening the cleaning roller unit). The cleaning fluid is typically water, to which a chemical cleaning agent may be added. The cleaning fluid can be used to moisten dirt on the surface to be cleaned, improving its removability.

[0066] In a structurally simple embodiment, the tank for cleaning fluid is positioned above the cleaning roller unit relative to the direction of gravity when the surface cleaning machine is operating in proper cleaning mode with the cleaning roller unit placed on the surface to be cleaned. The supply of cleaning fluid to the cleaning head, and in particular to the cleaning roller unit, is then effected solely by gravity. No additional pump is required to deliver cleaning fluid.

[0067] It is advantageous if the inlet opening of the dirty fluid tank device has a longitudinal extension direction oriented parallel to a rotational axis of the cleaning roller unit. This allows dirty fluid to be coupled into the dirty fluid tank device over a large length range.

[0068] The surface cleaning machine is designed specifically as a hand-operated or hand-guided surface cleaning machine. By supporting the surface to be cleaned via the cleaning roller unit, an operator can hold the surface cleaning machine at an end facing away from the cleaning head (so that it cannot tip over) and guide it across the surface to be cleaned.

[0069] In one embodiment, the cleaning head is self-propelled and self-steering. This allows for the realization of a cleaning robot, and in particular a mopping robot. The cleaning roller unit is in particular a mopping roller unit with one or more mopping rollers. Such a mopping roller can then, in particular, perform wet cleaning on a surface, in particular on a hard floor. A sweeping function can also be implemented. Such a sweeping function can be implemented, for example, via a separate mopping roller unit and / or via a sweeping edge of a mopping roller unit. The self-propelled and self-steering design of the cleaning head enables automatic surface cleaning.

[0070] In particular, the surface cleaning machine comprises the cleaning head and the stationary station relative to which the cleaning head is movable, wherein the stationary station is provided for at least one of the following: storing the cleaning head in a non-cleaning mode of the cleaning head; charging a battery device arranged on the cleaning head; defined discharging or partial discharging of the battery device arranged on the cleaning head; cleaning the cleaning roller unit of the cleaning head; emptying the dirty fluid tank device; filling the tank device for cleaning fluid with cleaning fluid. The stationary station forms a type of docking station for the cleaning head.

[0071] It is particularly advantageous if the cleaning head is driven by the cleaning roller unit and / or the additional support device. This allows the cleaning head to be self-propelled.

[0072] For the same reasons, it is advantageous to provide steerability of the cleaning head via the cleaning roller unit and / or the additional support device. This allows for the realization of a self-steering cleaning head, particularly for a robot mop.

[0073] In one embodiment, it is provided that a rotational drive of one or more cleaning rollers of the cleaning roller unit is implemented via the drive motor in a clockwise and counterclockwise direction. This allows, for example, a reversal of the direction of travel of the cleaning head. Furthermore, steerability can be achieved.

[0074] In one embodiment, the cleaning roller unit comprises at least a first cleaning roller with a first orientation of the rotational axis and a second cleaning roller with a second orientation of the rotational axis, wherein the first orientation and the second orientation are at an angle different from 0° and 180° to one another. In particular, the cleaning rollers of the cleaning roller unit are arranged triangularly to one another. This makes it easy to achieve a travel drive and also a steering drive for the cleaning head. The cleaning rollers of the cleaning roller unit (which are in particular wiping rollers) are responsible for cleaning and for the self-propelled and self-steering design. Steerability can be easily achieved by different rotational speeds or different directions of rotation on the first cleaning roller and the second cleaning roller.Furthermore, it allows for good cleaning of corners, edges, wall connections and the like.

[0075] In particular, a wedge-shaped arrangement of the first cleaning roller and the second cleaning roller is provided on the cleaning head, with a wedge tip located in the region of a front end of the cleaning head. This allows for a simple, self-propelled and self-steering implementation of the cleaning head. This results in a high cleaning effect for areas close to edges.

[0076] It is also advantageous if the rotation of the first cleaning roller and the rotation of the second cleaning roller can be driven independently of one another, whereby a change in the direction of the cleaning head is made possible, in particular, by appropriately controlling the first cleaning roller and the second cleaning roller. This results in a steerability for a self-propelled and self-steering design of the cleaning head, while maintaining a structurally simple structure.

[0077] The following description of preferred embodiments, taken in conjunction with the drawings, serves to further explain the invention. They show: Figure 1 shows a perspective view of an embodiment of a surface cleaning machine; Figure 2 shows a further perspective view of a cleaning head of the surface cleaning machine according to Figure 1 , wherein a connection to a device body is indicated; Figure 3 a side view of the cleaning head according to Figure 2 with removed dirty fluid tank device; Figure 4 a partial sectional view in plane E according to Figure 1 ; Figure 5 an enlarged view of area A according to Figure 4 with fixed dirty fluid tank device; Figure 6 the same view as Figure 5 , wherein a fixing device is in such a position that the dirty fluid tank device can be removed; Figure 7 the same view as Figure 5 in an intermediate position; Figure 8 a perspective view of an embodiment of a dirty fluid tank device; Figure 9 a view of the dirty fluid tank device according to Figure 8 in the direction B; Figure 10 a side view of the dirty fluid tank device according to Figure 8in the direction C; Figure 11 shows a schematic representation of an embodiment of a surface cleaning machine according to the invention with a stationary station and a self-propelled cleaning head; Figure 12 shows a perspective representation of an embodiment of a self-propelled cleaning head; Figure 13 shows an enlarged representation of the area D in the cleaning head according to Figure 12 ; Figure 14 a sectional view of another embodiment of a self-propelled cleaning head; Figure 15 an exploded view of the cleaning head according to Figure 14 ; Figure 16 shows a schematic partial sectional view of a further embodiment of a cleaning head according to the invention; and Figure 17 shows a schematic partial sectional view of a further embodiment of a cleaning head according to the invention.

[0078] An embodiment of a surface cleaning machine, which is shown in Figure 1 is shown and in the Figures 2 to 10is shown in partial representation and is designated by 10, is designed in particular as a hand-held and hand-guided floor cleaning machine for hard floors.

[0079] The surface cleaning machine 10 comprises a device body 12 and a cleaning head 14. The cleaning head 14 is arranged on the device body 12.

[0080] During a cleaning process on a surface 16 to be cleaned, the surface cleaning machine 10 is supported on the surface 16 to be cleaned via a cleaning roller unit 18, and in particular a single cleaning roller unit 18. The cleaning roller unit 18 has a single axis of rotation (see below). The cleaning roller unit 18 is a cleaning roller that can be one-piece or multi-piece. In the embodiment described below, the cleaning roller unit 18 is a two-piece cleaning roller.

[0081] The device body 12 has a longitudinal axis 20. The surface cleaning machine 10 is supported or guided by a handle. For this purpose, a support rod device 22 is located on the device body 12.

[0082] In one embodiment, the support rod device 22 comprises one (in particular, exactly one) support rod 24, which has a longitudinal extension parallel to the longitudinal axis 20. A handle 26, in particular a bow handle, is arranged on an upper region of the support rod device 22. An operator can hold the surface cleaning machine 10 with one hand using this handle 26 and guide it over the surface 16 to be cleaned (with the cleaning roller unit 18 supported on it).

[0083] The holding rod device 22 can be designed to be variable in length or fixed in length with respect to a length in the longitudinal axis 20.

[0084] The surface cleaning machine 10 is dimensioned such that, with the cleaning roller unit 18 resting on the surface 16 to be cleaned, an operator can conveniently perform a cleaning operation on the surface 16 to be cleaned using an angled support arm. In particular, the length of the surface cleaning machine 10 along the longitudinal axis 20 between the cleaning roller unit 18 and the handle 26 is in a range between 60 cm and 130 cm.

[0085] In particular, one or more operating elements are arranged on the handle 26. For example, a switch is provided, via which the surface cleaning machine 10 can be switched on or off for a cleaning operation. This switch can be used to switch the operation of a drive motor 28 for a rotational operation of the cleaning roller unit 18. Furthermore, a switch for actuating a valve device 38 (see below) can be provided.

[0086] The device body 12 comprises a housing 30 in which components of the surface cleaning machine 10 are arranged in a protected manner.

[0087] A holder 32 is arranged on the housing 30. A tank device 34 for cleaning fluid (in particular water with or without an additional cleaning agent) is removably arranged on the holder 32.

[0088] A tank receptacle 36 for the tank device 34 is arranged on the holder 32 of the housing 30. A corresponding outlet of the tank device 34 can be connected to the tank receptacle 36.

[0089] A valve device 38 is positioned in the housing 30 downstream of the tank receptacle 36.

[0090] One or more fluid lines 40 lead from the valve device 38 to the cleaning head 14.

[0091] The valve device 38 has a shut-off valve, via which the supply of cleaning fluid from the tank device 34 to the cleaning head 14 can be switchably shut off. A filter device 39 for cleaning fluid can be assigned to the valve device 38. The filter device 39 is, in particular, connected upstream of the shut-off valve and arranged between the valve device 38 and the tank receptacle 36.

[0092] When the shut-off valve is open, cleaning fluid can flow from the tank device 34 through the fluid line or fluid lines 40 to the cleaning head 14 and act on the surface 16 to be cleaned.

[0093] For this purpose, one or more outlet openings for cleaning fluid are provided on the cleaning head 14. It is generally possible for the outlet opening(s) to be arranged in such a way that the surface 16 to be cleaned is directly exposed to cleaning fluid.

[0094] In an advantageous variant, the outlet or outlets are arranged such that the cleaning roller unit 18, and in particular a coating 42 of the cleaning roller unit 18, is supplied with cleaning fluid. When the cleaning roller unit 18 is supplied with cleaning fluid, the surface 16 to be cleaned is then indirectly supplied with cleaning fluid.

[0095] The trim 42 is made in particular of a textile material.

[0096] The valve device 38 is assigned a switch by which the user can set whether the shut-off valve of the valve device 38 is blocked (i.e. the flow of cleaning fluid to the cleaning head 14 is blocked) or whether the shut-off valve is open (i.e. the flow of cleaning fluid from the tank device 34 to the cleaning head 14 is enabled).

[0097] This switch can be located on the housing 30. It is also possible, in principle, for the switch to be located on the handle 26.

[0098] In one embodiment, a battery device 44 for supplying electrical power to the drive motor 28 is arranged in the housing 30. The battery device 44 is rechargeable. This allows the surface cleaning machine 10 to be operated independently of a mains power supply.

[0099] However, it is also possible in principle for the surface cleaning machine 10 to be operated via mains power. In this case, a corresponding connection device for mains power is arranged on the surface cleaning machine 10.

[0100] The battery device 44 can be removable from the device body 12 in order to be able to recharge it using an appropriate charger.

[0101] It can also be provided that a corresponding charging device is integrated into the device body 12, allowing recharging without removing the battery device 44 from the device body 12. Corresponding connection sockets are arranged, for example, on the support rod 24.

[0102] The drive motor 28 is an electric motor. It has a motor axis 46. The motor axis 46 is coaxial with a rotational axis of the drive motor 28.

[0103] The drive motor 28 is located between the cleaning head 14 and the housing 30 on the device body 12.

[0104] In one embodiment, the motor axis 46 is oriented at an angle to the longitudinal axis 20 of the device body 12 (and the support rod 24).

[0105] The angle between the motor axis 46 and the longitudinal axis 20 is, for example, in the range between 150° and 170°.

[0106] In one embodiment, the cleaning head 14 is pivotable about a pivot axis 48 (see the Figures 2 and 3 ) relative to the device body 12. This pivoting is in Figure 2 indicated by the double arrow with the reference number 50.

[0107] In particular, the pivot axis 48 is coaxial with the motor axis 46.

[0108] In one embodiment, the drive motor 28 is arranged on an inner sleeve 52. This inner sleeve 52 preferably forms an encapsulation of the drive motor 28.

[0109] An outer sleeve 54 is firmly attached to the device body 12. The inner sleeve 52 sits in the outer sleeve 54. The inner sleeve 52 can pivot about the pivot axis 48 relative to the outer sleeve 54, with the inner sleeve 52 being pivotally mounted in the outer sleeve 54. The inner sleeve 52 and the outer sleeve 54 form a pivot bearing 56 for the pivotability of the cleaning head 14 relative to the device body 12. The drive motor 28 can pivot about the pivot axis 48 relative to the device body 12. Corresponding supply lines from the battery device 44 to the drive motor 28 are arranged and designed to allow pivoting. Accordingly, the fluid line 40 or the fluid lines 40 are designed to allow this pivoting.

[0110] The pivot bearing 56 has a basic position which is defined, for example, by (the only) rotational axis 58 of the cleaning roller unit 18 being perpendicular to the plane E according to Figure 1 is oriented. A pivoting about the pivot axis 58 relative to this basic position results in an angular position of the rotation axis 58 relative to the plane E.

[0111] The pivot bearing 56 is in particular adjusted in such a way that a particular amount of force is required in relation to a normal cleaning operation in order to cause the cleaning head 14 to pivot from its basic position.

[0112] The ability of the cleaning head 14 to pivot about the pivot axis 48 enables improved cleaning options even in places that are difficult to access, as the device body 12 with the holding rod device 22 can be "repositioned" relative to the surface 16 to be cleaned.

[0113] The cleaning head 14 has a cleaning roller holder 60, on which the cleaning roller unit 18 is mounted, rotatable about the rotation axis 58. The cleaning roller holder 60 is connected to the inner sleeve 52 in a rotationally fixed manner.

[0114] The cleaning roller holder 60 has a holding area 62 for the cleaning roller unit 18, and a receiving chamber 64 for a dirt fluid tank device 66 (see, for example, Figure 3 ).

[0115] The receiving chamber 64 is positioned between the holding area 62 and the inner sleeve 52. The inner sleeve 52 is, in particular, firmly connected to an outer side of the receiving chamber 64.

[0116] The cleaning roller unit 18 is torque-effectively coupled to the drive motor 28 via a gear device 68.

[0117] The gear device 68 connects a motor shaft of the drive motor 28 (which rotates about the motor axis 46) with a shaft 70 for the cleaning roller unit 18 in a torque-effective manner.

[0118] In one embodiment, the transmission device 68 includes a speed reducer. This serves to reduce the speed relative to the speed of the motor shaft. For example, a standard electric motor has speeds in the order of 7,000 revolutions per minute. The speed reducer ensures a reduction in the speed to, for example, approximately 400 revolutions per minute.

[0119] The speed reducer can be arranged in the inner sleeve 52 or outside the inner sleeve 52 on the cleaning roller holder 60.

[0120] The speed reducer is designed as a planetary gear, for example.

[0121] The transmission device 68 further includes an angular gear, which provides torque redirection to drive the cleaning roller unit 18 with the rotational axis 58 transverse (and in particular perpendicular) to the motor axis 46. The angular gear is connected downstream of the speed reducer.

[0122] In one embodiment, the bevel gear comprises one or more gears that are non-rotatably coupled to a corresponding shaft of the speed reducer. These gears act on a bevel gear for angle conversion.

[0123] In one embodiment, the transmission device 68 further comprises a belt that is torque-effectively coupled to the bevel gear and acts on the shaft 70. The belt bridges the distance between the shaft 70 and the bevel gear and ensures a speed reduction.

[0124] In one embodiment, the cleaning roller unit 18 is formed in two parts with a first part 72 and a second part 74. The first part 72 is seated in a rotationally fixed manner on a first side of the shaft 70 and the second part 74 is seated in a rotationally fixed manner on a second side opposite the first side of the shaft 70.

[0125] In an intermediate region 76 between the first part 72 and the second part 74, the gear mechanism 68 is guided and coupled to the shaft 70. They have the same rotation axis 58.

[0126] The cleaning roller unit 18 or the first part 72 and the second part 74 of the cleaning roller unit 18 have a sleeve 78 (cf. for example Figure 5 ), which is cylindrical in shape. The trim 42 is arranged on the sleeve 78. The cleaning roller unit 18, or rather the first part 72 and the second part 74, is fixed to the shaft 70 via the sleeve 78.

[0127] The cleaning roller unit 18 is arranged on the cleaning head 14 such that the rotation axis 58 is oriented perpendicular to the longitudinal axis 20.

[0128] The cleaning roller unit 18 has a length along the rotation axis 58 between a first end face 80 (which is formed on the first part 72) and a second end face 82 (which is formed on the second part 74), which is considerably greater than a corresponding width of the device body 12 perpendicular to the longitudinal axis 20. In particular, a length of the cleaning roller unit 18 between the first end face 80 and the second end face 82 is at least 20 cm and preferably at least 25 cm.

[0129] The receiving chamber 64 has a bottom 84 (see for example Figure 5). A receiving chamber wall 86 is arranged on the bottom 84, oriented transversely thereto. The receiving chamber wall 86 and the bottom 84 of the receiving chamber 64 define a receiving space 88 for the dirty fluid tank device 66.

[0130] Opposite the base 84, the receiving space 88 is open. The dirty fluid tank device 66 can be removed from or inserted into the receiving space 88 via a corresponding side 90. A removal direction or insertion direction 92 (cf. Figure 6 ) is substantially perpendicular to the floor 84 (and perpendicular to the rotation axis 58).

[0131] In one embodiment, the receiving chamber wall 86 has a step 96 on a wall region 94 of the receiving chamber wall 86. The wall region 94 faces the holding region 62.

[0132] The step 96 is further arranged close to the floor 84.

[0133] The receiving chamber 64 is assigned a fixing device 98, via which the dirty fluid tank device 66 is fixed to the receiving chamber wall 86 in a holding position 100 ( Figure 5 ) can be fixed. The fixation is achieved primarily by form-fitting.

[0134] In one embodiment, the fixing device 98 comprises a flap 102, which is arranged on the cleaning head 14 so as to be pivotable about a pivot axis 104 by means of a pivot bearing 106. The pivot bearing 106 is positioned on or near the inner sleeve 52.

[0135] The pivot axis 104 is oriented parallel to the rotation axis 58 of the rotating roller 18.

[0136] In the holding position 100, the flap 102 acts on the dirty fluid tank device 66 and holds it at the receiving chamber 64 in the receiving space 88.

[0137] To remove the dirt fluid tank device 66 from the cleaning head 14, the flap 102 can be pivoted from this holding position 100 in the direction of the device body 12 (cf. Figure 6 , indicated by the reference numeral 108) to release the dirty fluid tank device 66 so that it can be removed from the receiving space 88 on the side 90 in the removal direction 92 and can be removed from the cleaning head 14.

[0138] The dirty fluid tank device 66 ( Figures 8 to 10 ) is formed as a unit. It has a first chamber 110, which is assigned to the first part 72 of the cleaning roller unit 18, and a second chamber 112, which is assigned to the second part 74 of the cleaning roller unit 18.

[0139] The first chamber 110 receives dirt fluid coming from the first part 72 of the cleaning roller unit 18, and the second chamber 112 receives dirt fluid coming from the second part 74 of the cleaning roller unit 18.

[0140] It is fundamentally possible for the first chamber 110 and the second chamber 112 to be fluidically connected to one another and, for example, to be fluidically connected to a common discharge opening.

[0141] It can also be provided that the first chamber 110 and the second chamber 112 are separated from each other in a fluid-tight manner and each chamber 110, 112 has its own outlet opening.

[0142] The first chamber 110 and the second chamber 112 are spaced apart; between the first chamber 110 and the second chamber 112, the dirty fluid tank device 66 has a recess 114. The recess 114 is arranged in a central region of the dirty fluid tank device 66 relative to a longitudinal axis 116 of the dirty fluid tank device 66.

[0143] When the dirt fluid tank device 66 is fixed to the cleaning head 14 in the holding position 100, the longitudinal extension axis 116 is oriented parallel to the rotation axis 58 of the cleaning roller unit 18.

[0144] The longitudinal axis 116 of the dirty fluid tank device 66 extends between a first outer end 118 and a second outer end 120 of the dirty fluid tank device 66, wherein the dirty fluid tank device 66 has its greatest longitudinal dimensions between the first outer end 118 and the second outer end 120.

[0145] The recess 114 serves to pass through at least a portion of the gear mechanism 68. The cleaning roller unit 18 is centrally driven. The gear mechanism 68 bridges the distance between the drive motor 28 and the shaft 70. The recess 114 essentially occupies the space in the dirty fluid tank device 86 that accommodates the gear mechanism 68.

[0146] It can be provided that the receiving chamber 64 has a respective receiving space 88 for the first chamber 110 and the second chamber 112.

[0147] It is also possible that a common receiving space 88 is provided for the first chamber 110 and the second chamber 112.

[0148] The first chamber 110 and the second chamber 112 are connected to each other via a bridge 122, so that the dirty fluid tank device 66 forms a unit and can be removed as a whole from the cleaning head 14 or inserted into it.

[0149] In one embodiment, the dirty fluid tank assembly 66 includes a lid flap 124 pivotally mounted on the first chamber 110 and the second chamber 112 via spaced pivot bearings 126a, 126b.

[0150] The lid flap 124 can be opened to provide a corresponding emptying opening for the first chamber 110 and the second chamber 112 and to allow the dirty fluid tank device 66 to be cleaned in an interior space if necessary.

[0151] In an embodiment shown in the Figures 8 to 10As shown, the first chamber 110 and the second chamber 112 are separated from each other in a fluid-tight manner. The lid flap 124 is a common lid flap for both the first chamber 110 and the second chamber 112. By opening the lid flap 124, both the first chamber 110 and the second chamber 112 can be emptied, or access to the first chamber 110 and the second chamber 112 is provided in order to carry out appropriate cleaning.

[0152] The cover flap can be fixed to the first chamber 110 and / or the second chamber 112 and / or the bridge 122 in such a way that when the cover flap 124 is closed, a fluid-tight dirty fluid tank device 66 is provided (except for an inlet opening).

[0153] It is fundamentally possible for the dirty fluid tank device 66 to also comprise mechanically separate chambers, with one chamber each being assigned to the first part 72 and the second part 74 of the cleaning roller unit 18. In this case, the corresponding parts of the dirty fluid tank device must be removed or inserted separately from the cleaning head 14.

[0154] The dirty fluid tank assembly 66 has a bottom side 128 formed on an outer side of the base 84 at each of the first chamber 110 and the second chamber 112. It further has a top side 130 opposite the bottom side 128, which is formed on an outer side of the cover flap 124.

[0155] A recess 132 (or several recesses 132) is formed on the upper side 130 of the dirty fluid tank assembly 66 and thus on the cover flap 124. The recess or recesses 132 are groove-shaped and have an undercut surface 134.

[0156] The flap 102 has a counter element 136 (or several counter elements 136) which serve to cooperate with the recess 132.

[0157] A locking element 138 is arranged on the counter element 136 or the counter elements 136 ( Figures 5 to 7), which serves to cooperate with the undercut surface 134. When the counter element 136 with its locking element 138 is immersed in the recess 132 and the holding position 100 is reached, the locking element 138 rests against the undercut surface 134. This prevents the flap 102 from pivoting away from the top side 130 of the dirty fluid tank device 66. A corresponding force must be exerted to guide the locking element 138 away from the undercut surface 134.

[0158] The dirty fluid tank device 66 is positioned in relation to the flap 102 and the receiving chamber 64 such that, when the dirty fluid tank device 66 is positioned in the holding position 100 on the receiving chamber 64, the blocking element 138 is immersed in the recess 132 and accordingly rests against the undercut surface 134 and thus secures the holding position 100.

[0159] In one embodiment, the dirty fluid tank device 66 has a step 140 adapted to the step 96 (see, for example, Figure 6 ) on.

[0160] When the dirty fluid tank device 66 is inserted into the receiving space 88, the receiving chamber wall 86 blocks mobility of the dirty fluid tank device 66 in the receiving space 88 in the transverse directions to the removal / insertion direction 92.

[0161] This form-locking locking is supported by steps 96 and 140 if necessary.

[0162] The bottom 84 of the receiving chamber 64 prevents the dirty fluid tank device 66 from "surfacing" during insertion.

[0163] When the flap 102 is closed and the locking element 138 is positioned in the recess 132 with contact with the undercut surface 134, the mobility is blocked parallel to the removal direction 92 in order to secure the holding position 100 of the dirty fluid tank device 66 on the receiving chamber 64.

[0164] The flap 102 is designed in particular as a hold-down device, which ensures a defined positioning of the dirty fluid tank device 66 in relation to the cleaning roller unit 18.

[0165] The flap 102 is, in particular, arranged or configured to be elastic such that, in the holding position 100, the flap 102 exerts a corresponding positioning force and, in particular, the dirty fluid tank device 66 is pressed against the base 84 and also the wall region 94. The pressing against the wall region 94 is also supported by the cooperation of the step 96 on the wall region 94 with the step 140 in the dirty fluid tank device 66.

[0166] It can be provided that the flap 102 is spring-supported, for example, on the pivot bearing 106. Alternatively or additionally, the flap 102 can be configured, for example, on the counter element 136, in such a way that a corresponding elastic force can be exerted on the dirty fluid tank device 66.

[0167] The cleaning head 14 has a stripping guide device 142 (cf. Figure 5), which acts on the cleaning roller unit 18 (and thereby on the first part 72 and the second part 74) and serves to release dirty fluid (in particular water with dirt particles) carried along by the cleaning roller unit 18 and to supply it to an inlet opening 144 of the dirty fluid tank device 66, which is fixed in the holding position 100 on the cleaning head 14. As a result, dirty fluid is then coupled into the dirty fluid tank device 66.

[0168] The inlet opening 144 of the dirty fluid tank device 66 is designed like a slot ( Figure 9 ). It comprises a first part 146, which is an inlet opening for the first chamber 110, and a second part 148, which is an inlet opening for the second chamber 112.

[0169] In the Figure 9In the embodiment shown, the first part 146 and the second part 148 each have a greater length in the longitudinal axis 116 than the associated chamber 110 or 112. The dirty fluid tank device 66 has a respective wall at the end of the inlet opening 144 on the first part 146 and on the second part 148 in order to be able to supply dirty fluid collected via the first part 146 and the second part 148 of the inlet opening 144 to the first chamber 110 or the second chamber 112.

[0170] The first part 146 of the inlet opening 144 is associated with the first part 72 of the cleaning roller unit 18. The second part 148 of the inlet opening 144 is associated with the second part 74 of the cleaning roller unit 18. The first part 146 and the second part 148 of the inlet opening 144 are spaced apart from one another according to the spacing of the first part 72 and the second part 74.

[0171] Preferably, the first part 146 and the second part 148 each have a length in the longitudinal axis 116 which at least approximately corresponds to a corresponding trim length of the first part 72 or the second part 74 of the cleaning roller unit 18 along the rotation axis 58.

[0172] The stripping guide device 142 is designed such that it strips dirt fluid from the cleaning roller unit 18 and guides it into the inlet opening 144.

[0173] It is possible that when the cleaning roller unit 18 rotates, a guiding effect is achieved via the effect of the centrifugal force and, to a certain extent, dirty fluid is thrown into the dirty fluid tank device 66.

[0174] The stripping guide device 142 is spaced from the rotation axis 58.

[0175] In one embodiment (see for example Figure 5), the stripping guide device 142 projects with a depth T into the facing 42 of the cleaning roller unit 18. The depth T is in particular at least 5% of a thickness D ( Figure 5 ) of the trim 42 of the cleaning roller unit 18 relative to a moist state of the trim 42.

[0176] The stripping guide device 142 is formed in particular by one or more edge elements 150. For example, a respective edge element 150 is assigned to the first part 72 and the second part 74 of the cleaning roller unit 18.

[0177] An edge element 150 is designed as a strip which projects into the trim 42 of the cleaning roller unit 18 at the first part 72 and the second part 74.

[0178] The edge element 150 has a relatively small thickness, which is in particular smaller than a thickness D of the trim 42.

[0179] In one embodiment, the edge element 150 or the edge elements 150 are curved.

[0180] The stripping guide device 142 with the edge element 150 or the edge elements 150 forms in particular a wall of the inlet opening 144.

[0181] The edge element(s) 150 are rounded or chamfered at an edge facing the inlet opening 144. This protects the fibers of the trimming 42 and requires only a small force to be overcome during the rotation of the cleaning roller unit 18. This, in turn, achieves an energy-saving effect. This rounding of the edge is in Figure 5 indicated by the reference number 151.

[0182] In principle, it can be provided that the stripping guide device 142 is arranged on the cleaning roller holder 60.

[0183] In the embodiment shown, the scraper guide device 142 is located on the dirty fluid tank device 66.

[0184] This has a wall 152, which in the holding position 100 faces the wall region 94. The edge element(s) 150 are arranged on the corresponding wall 152 of the first chamber 110 and the second chamber 112.

[0185] The corresponding stripping guide device 142 is preferably arranged outside the cover flap 124 of the dirty fluid tank device 66.

[0186] In this embodiment, the wiper guide device 142 is removed from the cleaning head 14 when the dirty fluid tank device 66 is removed therefrom.

[0187] It is further provided that a cover 154 is positioned on the cleaning head 14 associated with the cleaning roller unit 18. The cover 154 is arranged downstream of the stripping guide device 142 (with the edge element(s) 150). The edge element 150 is curved in such a way that it is adapted to a corresponding curvature of the cleaning roller unit 118 with the trim 42.

[0188] In principle, the cover 154 can touch the facing 42 or penetrate into it, wherein the penetration preferably occurs at a lesser depth than the penetration of the stripping guide device 142 beyond the depth T.

[0189] In one embodiment, the fluid line 40 or the fluid lines 40 open into a region 156 between the cover 154 and the stripping guide device 142. In this region, the cleaning roller unit 18 can then be supplied with cleaning fluid from the tank device 34.

[0190] In particular, the region 146 has a length along the rotation axis 58 which corresponds at least approximately to a corresponding length of the first part 72 or the second part 74 of the cleaning roller unit 18 in order to enable a uniform liquid application to the cleaning roller unit 18 over its length.

[0191] In the embodiment shown, the cover 154 is arranged on the dirty fluid tank device 66.

[0192] It must then be ensured that a suitable coupling of the fluid line 40 or fluid lines 40 is achieved.

[0193] Related to a rotation direction 158 (cf. Figure 5 ) of the cleaning roller unit 18 during cleaning operation, the stripping guide device 142 with its edge element 150 or its edge elements 150 is arranged downstream of the inlet opening 144. This enables the "injection" of dirty fluid, which was previously carried by the cleaning roller unit 18 from the surface 16 to be cleaned and transported in the direction of the stripping guide device 142, via the stripping guide device 142 into the inlet opening 144 and thus into the dirty fluid tank device 66.

[0194] In one embodiment, the cleaning roller unit 18 is further assigned a sweeping element 160, which serves to convey coarse dirt to the cleaning roller unit 18. This dirt can then be carried along with the cleaning roller unit 18.

[0195] The inlet opening 144 is arranged between the stripping guide device 142 on the sweeping element 160.

[0196] In the illustrated embodiment, the sweeping element 160 is positioned on the cleaning roller holder 60 at the holding area 62. The sweeping element 160 is configured such that it can act on the surface 16 to be cleaned for the sweeping function at least in one angular position range (if the surface cleaning machine 10 is not positioned too steeply) of the surface cleaning machine 10 relative to the longitudinal axis 20 of the surface 16 to be cleaned.

[0197] The sweeping element 160 is, for example, pivotably arranged on the cleaning roller holder 60 and / or it is designed to be elastic.

[0198] In particular, the sweeping element 160 projects into the facing 42 of the cleaning roller unit 18. However, it can also only touch the facing 42 or be spaced apart from it.

[0199] With respect to the direction of rotation 158 of the cleaning roller unit 18, when the latter is driven in its rotational movement by the drive motor 28, the surface 16 to be cleaned is first followed by the sweeping element 160, then a guide region 162 of the cleaning roller holder 60, which is (hollow) cylindrical in shape and is adapted to the cleaning roller unit 18, then the inlet opening 144, then the stripping guide device 142 with the edge element(s) 150 and then the cover 154, wherein the region 156 lies between the cover 154 and the stripping guide device 142.

[0200] In the illustrated embodiment, the surface cleaning machine 10 is designed without a suction fan. Dirty fluid, which is carried along by the cleaning roller unit 18, is not sucked into the dirty fluid tank device 66 by an additional suction fan; instead, the stripping guide device 142 alone ensures that the dirty fluid is coupled into the dirty fluid tank device 66.

[0201] In principle, however, it is also possible for the coupling to be supported by an additional suction fan.

[0202] The surface cleaning machine 10 functions as follows: In a cleaning operation, the dirty fluid tank device 66 is fixed to the cleaning head 14 in the holding position 100.

[0203] For a cleaning operation, the surface cleaning machine 10 is placed on the surface 16 to be cleaned using only the cleaning roller unit 18. The drive motor 28 drives the cleaning roller unit 18 in a rotational movement about the (single) rotation axis 58 in the rotation direction 158.

[0204] The cleaning roller unit 18 is supplied with cleaning fluid from the tank device 34.

[0205] Dirt on the surface 16 to be cleaned is moistened when the moistened coating 42 of the cleaning roller unit 18 acts on it, in order to make it easier to remove.

[0206] The rotation of the cleaning roller unit 18 causes a mechanical action on dirt on the surface 16 to be cleaned in order to achieve better detachability from the surface 16 to be cleaned.

[0207] Any coarse dirt can be fed to the cleaning roller unit 18 using the sweeping element 160.

[0208] Dirt fluid (dirt particles, cleaning fluid with dissolved dirt) is entrained by the cleaning roller unit 18, and at the stripping guide device 142, the dirt fluid is released from the cleaning roller unit 18 and (among other things, under the action of centrifugal force) guided into the inlet opening 144 and from there into the dirt fluid tank device 66. The stripping guide device 142 ensures, by stripping, a release of dirt fluid from the fill 42 of the cleaning roller unit 18.

[0209] The coupling of dirty fluid into the dirty fluid tank device 66 takes place in particular without a suction fan.

[0210] The dirty fluid tank device 66 is removably positioned on the cleaning head 14.

[0211] The flap 102 ensures that the holding position 100 is secured. In the holding position 100, the inlet opening 144 of the dirty fluid tank device 66 is also aligned in relation to the stripping guide device 142 with respect to the cleaning roller unit 18 in such a way that the corresponding release function and coupling function is achieved as described above.

[0212] The flap 102, with its function as a hold-down device, ensures that the edge element 150 or the edge elements 150 are pressed into the facing 42 with the depth T in order to achieve an optimal detachment function by stripping.

[0213] In particular, the scraper guide device 142 is arranged on the dirty fluid tank device 66 and can be removed from the cleaning head 14 together with it.

[0214] The flap 102 presses with its counter element 136 and the locking element 138 arranged thereon onto the upper side 130 of the dirty fluid tank device 66 and thereby secures the holding position in which the above-described relative positioning of the stripping guide device 142 to the cleaning roller unit 18 is also achieved.

[0215] A positive-locking mounting of the dirty fluid tank device 66 on the receiving chamber 64 in the holding position 100 is provided.

[0216] To remove the dirty fluid tank device 66 ( Figure 3 , Figures 6 , 7 ), the flap 102 is opened. It is pivoted toward the device body 12. In order to guide the locking element 138 out of the recess 132 with the undercut surface 134, a corresponding elastic deformation of the counter element 136 must be carried out.

[0217] When the flap 102 ( Figure 6) the dirty fluid tank 66 can then be removed (see Figure 3 ).

[0218] By opening the cover flap 124 of the dirty fluid tank device 66, it can be emptied and, if necessary, cleaned, for example by rinsing.

[0219] The dirty fluid tank device 66, for example, has a capacity of approximately 150 ml.

[0220] The surface cleaning machine 10 has a relatively low energy requirement since no suction fan needs to be provided and dirty fluid is coupled directly from the cleaning roller unit 18 with a "minimized path" into the dirty fluid tank device 66.

[0221] The surface cleaning machine 10 can therefore be operated in an optimized manner with a rechargeable battery device 44.

[0222] The surface cleaning machine according to the invention enables wet cleaning of hard floors with a high degree of automation. The effort required for wiping is reduced or even eliminated by the mechanical assistance provided by the driven rotating roller 18. The moistening of the cleaning roller unit 18 allows an operator to perform a cleaning process without coming into contact with the dirty fluid.

[0223] In addition, during cleaning operation, the cleaning roller unit 18 undergoes a self-cleaning process to a certain extent.

[0224] The dirty fluid tank device 66 is arranged between the cleaning roller unit 18 and the drive motor 28. A longitudinal extension direction of the inlet opening 144, which is parallel to the longitudinal extension axis 116, is parallel to the rotation axis 58 of the cleaning roller unit 18 and transverse and in particular perpendicular to the motor axis 46. Furthermore, this longitudinal extension axis of the inlet opening 144 is transverse and in particular perpendicular to the longitudinal axis 20.

[0225] It can be provided that the drive motor 28 is also used to drive one or more suction turbines, which are correspondingly in fluid communication with an interior of the dirty fluid tank device 66 in order to generate a negative pressure which improves the coupling of dirty fluid into the dirty fluid tank device.

[0226] In principle, the surface cleaning machine 10 can also be operated in mains operation.

[0227] The sweeping element 160 can also be arranged on the dirty fluid tank device 66.

[0228] Overload protection may be provided. This may be implemented, for example, as a mechanical overload protection device, which may include a slip clutch. Alternatively or additionally, electronic overload protection may be provided, which, for example, performs an overcurrent shutdown.

[0229] During normal cleaning operation, the tank device 34 is arranged above the cleaning head 14 with respect to the direction of gravity. This allows cleaning fluid to flow from the tank device 34 to the cleaning head 14 without the need for a pump, under the effect of gravity, in order to apply cleaning fluid to the surface 16 to be cleaned directly or indirectly via the cleaning roller unit 18.

[0230] The surface cleaning machine 10 can be designed such that the sweeping element 160 only becomes effective when a certain angular position relative to the longitudinal axis 20 to the surface 16 to be cleaned is set and in particular an angle between the surface 16 to be cleaned and the longitudinal axis is below a maximum angle.

[0231] During cleaning, the surface cleaning machine 10 is moved over the surface 16 to be cleaned under the guidance of a user. Due to the rotational drive of the cleaning roller unit 18, little or no force is required for a forward movement perpendicular to the rotation axis 58. Changes in direction are initiated by the operator using an appropriate force.

[0232] Another example of a cleaning machine 202 ( Figures 11 to 13) comprises a stationary station 204 (docking station) and a cleaning head 206. The cleaning head 206 is self-propelled and self-steering. It can independently perform cleaning operations, and in particular, wiping operations, on the surface 16 to be cleaned.

[0233] The cleaning head 206 comprises a cleaning roller unit 208 (see Figure 13 ), a drive motor 210 for the cleaning roller unit 208, a battery device 212 for supplying the drive motor 206 with electrical energy, a dirty fluid tank device 214 for receiving dirty fluid, and a tank device 216 for cleaning fluid.

[0234] The dirty fluid tank device 214 and / or the tank device 216 for cleaning fluid are in particular arranged removably on the cleaning head 206.

[0235] The stationary station 204 can perform various tasks, such as storing the cleaning head 206 during a non-cleaning operation; charging the rechargeable battery device 212; discharging or partially discharging the battery device 212 after completion of a cleaning operation; emptying the dirty fluid tank device 214 after completion of a cleaning operation; filling the tank device 216 for cleaning fluid; and cleaning the cleaning roller unit 208 after completion of a cleaning operation.

[0236] In particular, a device is provided that enables the cleaning head 206 to automatically return to the stationary station 204 "when needed", such as upon detection of a lower threshold for the charge of the battery device 212, and / or upon reaching an upper threshold for a fill level of the dirty fluid tank device 214, and / or upon reaching a lower threshold for the filling of the tank device 216.

[0237] In one embodiment, a connection 218 is arranged on the cleaning head 206, via which the stationary station 204 can act on the cleaning head 206, for example, to charge the battery device 212 (or discharge it), or to empty the dirty fluid tank device 214, or to fill the tank device 216.

[0238] A single connection 218 with various sub-connections can be provided, or separate connections can be provided accordingly.

[0239] The cleaning head 206 has a body 220 on which the cleaning roller unit 208, the drive motor 210, the battery device 212, the dirty fluid tank device 214 and the tank device for cleaning fluid 216 are arranged.

[0240] In one embodiment ( Figure 13 ) The cleaning roller unit 208 of the cleaning head 206 comprises a first cleaning roller 222 with a first orientation 224 of a corresponding rotation axis. It further comprises a second cleaning roller 226 with a second orientation 228 of the rotation axis.

[0241] The first orientation 224 and the second orientation 228 are at an angle different from 0° and 180° to each other, i.e., they are not coaxial. This results in a wedge-shaped configuration with an actual or imaginary wedge tip 230 (compare Figure 12 ) at a front end of the cleaning head 206.

[0242] It is intended that the first cleaning roller 222 and the second cleaning roller 226 are driven by the same drive motor 210 with the rotational axis having the first orientation 224 and the second orientation 228. A corresponding gearing is provided for this purpose.

[0243] In principle, however, it is also possible for each cleaning roller to have its own drive motor.

[0244] In particular, each cleaning roller 222, 226 of the cleaning roller unit 208 in turn has partial rollers 232a, 232b, wherein the partial rollers 232a, 232b are mounted on a shaft 234, and an engagement area for the drive motor 210 (or correspondingly the gear) is arranged on the shaft 234 at a central area of ​​the corresponding first cleaning roller 222 or 226 relative to the respective partial rollers 232a, 232b. A central engagement then occurs for each cleaning roller 222, 226.

[0245] It is particularly possible, for example by appropriately designing a gear, for the first cleaning roller 222 and the second cleaning roller 226 to be operable at different rotational speeds and, if appropriate, with different rotational directions.

[0246] The cleaning head 206 is driven by corresponding rotation of the cleaning roller unit 208. Steering can be achieved by different rotation speeds and / or rotation directions for the first cleaning roller 222 and the second cleaning roller 226.

[0247] Otherwise, the cleaning head 206 works as described above.

[0248] During cleaning operation, the cleaning head 206 moves over the surface 216 to be cleaned. The cleaning rollers 222, 226 of the cleaning roller unit 208 are "moistened" by cleaning fluid from the tank device 216.

[0249] Dirt removed from the surface 16 to be cleaned is carried along by the cleaning rollers 222, 226, removed from a scraper, which can in particular be firmly connected to the dirt fluid tank device 214, and transported into the dirt fluid tank device 214.

[0250] Due to its self-propelled and self-steering design, the cleaning head 206 can perform cleaning tasks and in particular wiping tasks independently as a "wiping robot".

[0251] A further embodiment of a cleaning head 240 of a surface cleaning machine according to the invention ( Figures 14 , 15 ) comprises a body 242. On this body is arranged a wiping roller unit 246 which is rotatably driven about a rotation axis 244. A corresponding drive motor is provided (in Figure 14 not shown).

[0252] A sweeping roller unit 250 that can be driven in rotation about a rotation axis 248 is arranged on the body 242 at a distance from the wiping roller unit 246.

[0253] The sweeping roller unit 250 and the wiping roller unit 246 form a cleaning roller unit 252 of the cleaning head 240.

[0254] The sweeping roller unit 250 may include its own drive motor or the drive motor for the wiping roller unit 246 may also be provided to drive the sweeping roller unit 250.

[0255] In particular, if separate drive motors are provided for the wiping roller unit 246 and for the cleaning roller unit 252, then a device for driving the wiping roller unit 256 and the sweeping roller unit 250 at the same rotational speed is provided.

[0256] A removable dirty fluid tank assembly 254 is disposed on the body 242. In one embodiment, the dirty fluid tank assembly 254 includes a container 256 (a tank) for holding dirty fluid.

[0257] The container 256 is arranged so that "wet" dirt fluid coming from the wiping roller unit 246 can be received in the container 256.

[0258] In particular, a scraper 258 (scraper guide device 258) is assigned to the wiping roller unit 246, which ensures a corresponding detachment of dirty fluid from the filling of the wiping roller unit 246 and supply to the container 256.

[0259] In one embodiment, the scraper 258 is fixedly connected to the container 256.

[0260] The container 256 of the dirt fluid tank assembly 254 is arranged to also receive sweepings from the sweeping roller unit 250; sweepings are the "dry" dirt fluid provided by the sweeping roller unit 250.

[0261] The sweeping roller unit 250 is assigned a ramp-shaped sweeping edge 262. The sweeping edge 262 ensures that sweeping material is fed to the container 256.

[0262] As mentioned above, in particular the container 256 is detachable from the cleaning head 240.

[0263] In particular, it is provided that the dirt fluid tank device 254, and in particular the container 256, are positioned between the wiping roller unit 246 and the sweeping roller unit 250. It forms a common receptacle for dirt fluid from the cleaning roller unit 252 and, in particular, the wiping roller unit 246 and the sweeping roller unit 250.

[0264] A tank device 260 for cleaning fluid is arranged on the body 242. Cleaning fluid can be supplied from this to the wiping roller unit 246, particularly from above.

[0265] When the cleaning head 240 is correctly positioned on the surface 16 to be cleaned, the tank device 260 is positioned above the container 256 with respect to the surface 16 to be cleaned.

[0266] In one embodiment, it is provided that the cleaning head 240 is supported on the surface 16 to be cleaned via the cleaning roller unit 252 and both via the wiping roller unit 246 and via the sweeping roller unit 250.

[0267] In relation to the wiping roller unit 246, the sweeping roller unit 250 forms a further support device for the support on the surface 16 to be cleaned.

[0268] An at least partial drive (see below) of the cleaning head 240 for movement on the surface 16 to be cleaned is effected via a rotational movement of the wiping roller unit 246 and / or the sweeping roller unit 250.

[0269] A corresponding steering device may be provided for steering.

[0270] In the cleaning head 240, the dirt fluid tank device 254 has a common receptacle 256 for dirt fluid from the wiping roller unit 246 and the sweeping roller unit 250.

[0271] In a further embodiment of a cleaning head 270 ( Figure 16 ) a cleaning roller unit 272 comprises a wiping roller unit 274 and a sweeping roller unit 276. The wiping roller unit 274 and the sweeping roller unit 276 are arranged next to one another and in particular are arranged in contact with one another such that a dirt fluid tank device 278 comprises a common receptacle 280 for dirt fluid from the wiping roller unit 274 and the sweeping roller unit 276.

[0272] The contact between the sweeping roller unit 276 and the wiping roller unit 274 is in particular such that bristles of the sweeping roller unit 276 dip into a bristle of the wiping roller unit 274.

[0273] A scraper 282 is provided which releases dirt fluid from the wiping roller unit 274 and enables transport into the receptacle 280.

[0274] It may be provided that the sweeping roller unit 276 is arranged with respect to the wiping roller unit 274 such that dirt fluid is transferred from the sweeping roller unit 276 to the wiping roller unit 274 and then "common" dirt fluid is released from the scraper 282 and conveyed into the dirt fluid tank device 278.

[0275] Otherwise, the cleaning head 270 works as described above.

[0276] In particular, it is designed to be self-driving and self-steering.

[0277] In an alternative or combinatorial embodiment of a cleaning head 290 ( Figure 17 ) A further support device 292 is provided for a wiping roller unit corresponding to the wiping roller unit 246 on the cleaning head 240, with the associated dirt fluid tank device 256. This further support device serves to support the cleaning head 290 on the surface 214 to be cleaned.

[0278] The further support device 292 is in particular positioned at a distance from the wiping roller unit 246.

[0279] For example, the container 256 for dirty fluid is positioned between the further support device 292 and the wiping roller unit 246.

[0280] The further support device 292 serves to support the cleaning head 290 together with the wiping roller unit 246 (and optionally a sweeping roller unit 250) on the surface 16 to be cleaned.

[0281] For example, the further support device 292 comprises one or more sliding elements such as sliding skids.

[0282] It is also possible for the further support device 292 to comprise one or more rollers.

[0283] In principle, the further support device 292 can be driven in such a way that it at least supports the travel drive of the cleaning head 290 on the surface to be cleaned.

[0284] In one embodiment, the further support device 292 is designed to be steerable. This is shown in Figure 17 indicated by the reference number 294.

[0285] The steerability, which is in particular controllable, is achieved, for example, via one or more steering rollers, wherein a corresponding steering drive 296 with in particular an electric motor is provided.

[0286] The self-steering cleaning head 290 can be steered by the steering drive 296.

[0287] For example, the further support device 292 with the steering drive 296 can also be implemented on the cleaning head 240 with wiping roller unit 246 and sweeping roller unit 250 or on the cleaning head 270 with wiping roller unit 274 and cleaning roller unit 272.

[0288] In principle, it can also be implemented on the cleaning head 206. List of reference symbols

[0289] 10Surface cleaning machine 12Device body 14Cleaning head 16Surface to be cleaned 18Cleaning roller unit 20Longitudinal axis 22Holding rod assembly 24Holding rod 26Handle 28Drive motor 30Housing 32Holder 34Tank assembly for cleaning fluid 36Tank receptacle 38Valve assembly 39Filter assembly 40Fluid line 42Filling 44Battery assembly 46Motor shaft 48Pivot shaft 50Double arrow 52Inner sleeve 54Outer sleeve 56Pivot bearing 58Rotational axis 60Cleaning roller holder 62Holding area 64Receiving chamber 66Dirty fluid tank assembly 68Gear assembly 70Shaft 72First part 74Second part 76Intermediate area 78Sleeve 80First end face 82Second end face 84Bottom 86Receiving chamber wall 88Receiving space 90Side 92Removal / insertion direction 94Wall area 96Step 98Fixing device 100Holding position 102Flap 104Pivot axis 106Pivot bearing 108Direction 110First chamber 112Second chamber 114Recess 116Longitudinal axis 118First outer end 120Second outer end 122Bridge124 Cover flap 126a Pivot bearing 126b Pivot bearing 128 Bottom 130 Top 132 Recess 134 Undercut surface 136 Counter element 138 Locking element 140 Step 142 Scraper guide device 144 Entrance opening 146 First part 148 Second part 150 Edge element 151 Rounding, chamfering 152 Wall 154 Cover 156 Area 158 Direction of rotation 160 Sweeping element 162 Guide area 202 Cleaning machine 204 Stationary station 206 Cleaning head 208 Cleaning roller unit 210 Drive motor 212 Battery device 214 Dirt fluid tank device 216 Tank device for cleaning fluid 218 Connection 220 Body 222 First cleaning roller 224 First orientation 226 Second cleaning roller 228 Second orientation 230 Wedge tip 232a Partial roller 232b Partial roller 234 Shaft 240 Cleaning head 242 Body 244 Rotation axis 246 Wiping roller unit 248 Rotation axis 250 Sweeping roller unit 252 Cleaning roller unit 254 Dirt fluid tank unit 256 Container 258 Scraper 260 Cleaning fluid tank unit 262 Sweeping edge270 Cleaning head 272 Cleaning roller unit 274 Wiping roller unit 276 Sweeping roller unit 278 Dirt fluid tank unit 280 Mount 282 Scraper 290 Cleaning head 292 Additional support device 294 "Steerability" 296 Steering drive

Claims

1. Surface cleaning machine, comprising a cleaning head (14; 206; 240) with a driven cleaning roller unit (18; 208; 252) with a rotation axis (58), wherein in a cleaning operation the surface cleaning machine is supported on a surface (16) to be cleaned via the cleaning roller unit (272) and a further support device (292), a drive motor (28; 210) for the cleaning roller unit (18; 208; 272), and a dirty fluid tank device (66; 214; 254; 278) which is removably arranged on the cleaning head (14; 206; 240).

2. Surface cleaning machine according to claim 1, characterized in that the cleaning roller unit (18; 208; 252) is or comprises a wiping roller unit (246).

3. Surface cleaning machine according to claim 1 or 2, characterized in thatthe cleaning roller unit (252) comprises a wiping roller unit (246; 274) and a sweeping roller unit (250; 276), and in particular that the surface cleaning machine is supported on the surface (16) to be cleaned via the wiping roller unit (246; 274) and the sweeping roller unit (250; 276) in the cleaning operation, and in particular that the dirty fluid tank device (278) comprises a common receptacle (256) for sweepings from the sweeping roller unit (276) and for dirty fluid from the wiping roller unit (274), and in particular that the dirty fluid tank device (254) comprises separate receptacles for sweepings from the sweeping roller unit (250) and for dirty fluid from the wiping roller unit (246), and in particular that one or more containers (256) of the dirty fluid tank device (254) for dirt fluid are detachably positioned on the cleaning head (240) between the sweeping roller unit (250) and the wiping roller unit (246).

4. Surface cleaning machine according to one of the preceding claims, characterized byat least one of the following: the further support device (292) is a roller unit with one or more rollers and in particular with one or more cleaning rollers, and / or the support device is or comprises at least one roller, and / or the support device is or comprises at least one sliding element; the cleaning roller unit (18; 208) comprises one or more cleaning rollers (222, 226) or partial cleaning rollers which are driven by the same drive motor (210), wherein different cleaning rollers (222, 226) or partial cleaning rollers have identically oriented axes of rotation or have differently oriented axes of rotation (224, 228); a longitudinal extension axis (116) of the dirty fluid tank device (66) is oriented parallel to the axis of rotation (58) of the cleaning roller unit (18);a motor axis (46) of the drive motor (28) is oriented transversely and in particular perpendicularly to a longitudinal axis (116) of the dirty fluid tank device (66); 5. Surface cleaning machine according to one of the preceding claims, characterized in that the dirt fluid tank device (66) is arranged between the cleaning roller unit (18) and the drive motor (28), and in particular characterized by a gear device (68) for torque transmission, which is arranged between the drive motor (28) and the cleaning roller unit (18), that the dirty fluid tank device (66) has an upper side (130) and a lower side (128), wherein the lower side (128) faces a cleaning roller holder (60) of the cleaning roller unit (18) and the upper side (130) faces away from the lower side (128), and that the gear device (68) is guided past the lower side (128) or the upper side (130) of the dirty fluid tank device (66), and in particular characterized in that the dirty fluid tank device (66) has a recess (114) in which at least a partial region of the gear device (68) is positioned when the dirty fluid tank device (66) is fixed to the cleaning head (14).

6. Surface cleaning machine according to one of the preceding claims, characterized bya device body (12) on which the cleaning head (14) is arranged, wherein at least one of the following devices is positioned on the device body (12): a tank device (34) for cleaning fluid; a valve device (38) for supplying cleaning fluid to the cleaning head (14); a battery device (44) for the drive motor (28); a holding rod device (22) for holding and / or guiding the surface cleaning machine; a filter device (39) for cleaning fluid;at least partially the drive motor (28), and in particular that the drive motor (28) is at least partially arranged between the device body (12) and the cleaning head (14), wherein it is in particular partially arranged in the device body (12), and in particular that the cleaning head (14) is pivotable about a pivot axis (48) relative to the drive motor (28) and / or the device body (12), wherein the pivot axis (48) is in particular oriented parallel or coaxially to a motor axis (46) of the drive motor (28); 7. Surface cleaning machine according to one of the preceding claims, characterized in thata cleaning roller holder (60) has a receiving chamber (64) with a receiving space (88) for the dirty fluid tank device (66), and in particular that the receiving chamber (64) is assigned a fixing device (98), by means of which the dirty fluid tank device (66) can be fixed to the receiving chamber (64), wherein the fixing device (98) is designed to be detachable for the removal of the dirty fluid tank device (66) from the cleaning head (14) and in particular the fixing device (98) is designed such that the dirty fluid tank device (66) is held in a holding position (100) on the receiving chamber (64) by means of a positive fit, and in particular that the fixing device (98) is or comprises at least one pivotable flap (102), and in particular that a pivot axis (104) of the at least one flap (102) is aligned at least approximately parallel to a rotation axis (58) of the cleaning roller unit (18) is, and in particular,that the at least one flap (102) acts on an upper side (130) of the dirty fluid tank device (66), which is facing away from a lower side (128), wherein the lower side (128) of the dirty fluid tank device (66) faces a bottom (84) of the receiving chamber (64) when the dirty fluid tank device (66) is fixed to the cleaning head (14), and in particular that the at least one flap (102) is designed as a hold-down device, which positions the dirty fluid tank device (66) in a defined manner in relation to the cleaning roller unit (18) and / or in the receiving space (88) and in particular presses the dirty fluid tank device (66) in a holding position (100) against a bottom (84) of the receiving chamber (64), and in particular that the at least one flap (102) is spring-loaded and / or is designed elastically such that the dirty fluid tank device (66) in the receiving space (88) with a prestress, and in particular,that at least one recess (132) is arranged on the upper side (130) of the dirty fluid tank device (66), and the at least one flap (102) has at least one counter-element (136) for immersing into the at least one recess (132), and in particular that the at least one recess (132) has at least one undercut (134), and the at least one counter-element (136) has a blocking element (138) adapted to the at least one undercut (134), which, when the at least one flap (102) is closed, blocks mobility of the dirty fluid tank device (66) in a direction (92) away from a bottom (84) of the receiving chamber (64), and in particular that the receiving chamber (64) and the dirty fluid tank device (66) are adapted to one another,that in a holding position (100) of the dirty fluid tank device (66) on the receiving chamber (64), mobility of the dirty fluid tank device (66) transversely to a vertical of a floor (84) of the receiving chamber (64) is blocked., 8. Surface cleaning machine according to one of the preceding claims, characterized in that the dirty fluid tank device (66) has one or more cover flaps (124) and / or that the dirty fluid tank device (66) is designed as a unit.

9. Surface cleaning machine according to one of the preceding claims, characterized in thatthe cleaning roller unit (18) is designed in two parts with a first part (72) and a second part (74), wherein a first chamber (110) of the dirty fluid tank device (66) is assigned to the first part (72) of the cleaning roller unit (18) and a second chamber (112) of the dirty fluid tank device (66) is assigned to the second part (74) of the cleaning roller unit (18), and in particular the drive motor (28) acts on a central region which lies between the first part (72) and the second part (74).

10. Surface cleaning machine according to one of the preceding claims, characterized bya stripping guide device (142; 258) for dirty fluid, which acts on the cleaning roller unit (18; 252) and which is arranged at an inlet opening (144) of the dirty fluid tank device (66; 254), and in particular that the stripping guide device (142; 258) is arranged and designed such that dirty fluid, which is carried along by the cleaning roller unit (18; 252), is released by stripping from the cleaning roller unit (18; 252) and is guided to the inlet opening (144) of the dirty fluid tank device (66; 254), and in particular that the stripping guide device (142; 258) is designed such that dirty fluid is guided without suction fan through the stripping guide device (142; 258) at the inlet opening (144) of the Dirt fluid tank device (66; 254) is guided into the dirty fluid tank device (66; 254), and in particular that the stripping guide device (142;258) is arranged downstream of the inlet opening (144), and in particular that the stripping guide device (142; 258) projects into a facing (42) of the cleaning roller unit (18; 252), and in particular that the stripping guide device (142; 258) is rounded or chamfered at an edge which projects into the facing (42) and which faces the inlet opening (144), and in particular that the stripping guide device (142; 258) projects into the facing (42) with a depth (T) of at least 5% of a thickness (D) of the facing (42), based on a moist facing (42), and in particular that the stripping guide device (142; 258) is arranged on the dirty fluid tank device (66; 254) and is connected to the Dirt fluid tank device (66; 254) is removable from the cleaning head (14; 240), and in particular that the scraper guide device (142;258) is formed by one or more edge elements (150), wherein in particular one edge element (150) at least partially forms a wall of the inlet opening (144); 11. Surface cleaning machine according to one of the preceding claims, characterized in that at least one sweeping element (160) is arranged on the cleaning head (14), by means of which sweeping element coarse dirt can be fed to the cleaning roller unit (18) for entrainment by the cleaning roller unit (18), and in particular that an inlet opening (144) of the dirt fluid tank device (66) is positioned between a stripping guide device (142) and the at least one sweeping element (160).

12. Surface cleaning machine according to one of the preceding claims, characterized bya battery device (44) and in particular a rechargeable battery device (44) for supplying the drive motor (28; 210) with electrical energy, and in particular that the drive motor (28; 210) is arranged between the battery device (44) and the cleaning head (14; 206).

13. Surface cleaning machine according to one of the preceding claims, characterized by a tank device (34; 260) for cleaning liquid, and in particular that the tank device (34; 260) for cleaning liquid is positioned above the cleaning roller unit (18; 252) with respect to the direction of gravity when the surface cleaning machine is operated in a proper cleaning mode with the cleaning roller unit (18; 252) placed on the surface (16) to be cleaned.

14. Surface cleaning machine according to one of the preceding claims, characterized in thatan inlet opening (144) of the dirty fluid tank device (66) has a longitudinal extension direction which is oriented parallel to a rotation axis (58) of the cleaning roller unit (18).

15. Surface cleaning machine according to one of the preceding claims, characterized by training as a hand-operated or hand-guided surface cleaning machine.

16. Surface cleaning machine according to one of claims 1 to 14, characterized in that the cleaning head (206; 240; 270; 290) is self-propelled and self-steering, and in particular characterized bythe cleaning head (206; 240; 270; 290) and a stationary station (204) relative to which the cleaning head (206; 240; 270; 290) is movable, wherein the stationary station (204) is provided for at least one of the following: - storage of the cleaning head (206; 240; 270; 290) in a non-cleaning mode of the cleaning head (206; 240; 270; 290); - charging a battery device (212) arranged on the cleaning head (206; 240; 270; 290); - defined discharging or partial discharging of the battery device (212) arranged on the cleaning head (206; 240; 270; 290); - Cleaning the cleaning roller unit (208; 252) of the cleaning head (206; 240; 270; 290); - Emptying the dirty fluid tank device (214; 254; 278); - Filling a tank device (216; 260) for cleaning fluid with cleaning fluid.

17. Surface cleaning machine according to claim 16, characterized bya travel drive of the cleaning head (206; 240; 270; 290) via the cleaning roller unit (208; 252) and / or the further support device (292) and / or characterized by a steerability of the cleaning head (206; 240; 270; 290) via the cleaning roller unit (208; 252) and / or by the further support device (292).

18. Surface cleaning machine according to one of the preceding claims, characterized in that a rotational drive of one or more cleaning rollers (222, 226) of the cleaning roller unit (206) is carried out in a clockwise and counterclockwise direction via the drive motor (210).

19. Surface cleaning machine according to one of the preceding claims, characterized in thatthe cleaning roller unit (208) comprises at least a first cleaning roller (222) with a first orientation (224) of the rotation axis and a second cleaning roller (226) with a second orientation (228) of the rotation axis, wherein the first orientation (224) and the second orientation (226) are at an angle different from 0° and 180° to each other, and in particular characterized by a wedge-shaped arrangement of the first cleaning roller (222) and the second cleaning roller (226), wherein in particular a wedge tip (230) lies in the region of a front end of the cleaning head (204), and in particular characterized in that a rotation of the first cleaning roller (222) and a rotation of the second cleaning roller (226) can be driven independently of one another, wherein a change in direction of the cleaning head (204) is made possible in particular by appropriate control of the first cleaning roller (222) and the second cleaning roller (226).

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