EP3361924A1

EP3361924A1 - Surface-cleaning machine

Info

Publication number: EP3361924A1
Application number: EP15775749.3A
Authority: EP
Inventors: Fabian MOSER; Christoph RUFENACH; Rainer Kurmann; Andreas MÜLLER; Manuel SCHULZE
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2015-10-12
Filing date: 2015-10-12
Publication date: 2018-08-22
Anticipated expiration: 2035-10-12
Also published as: US10959590B2; EP3361924B1; WO2017063663A1; JP2018529501A; US20180228331A1; CN108135419A

Abstract

The invention relates to a surface-cleaning machine comprising a device body (12) with a housing (28); a suction assembly device (32) with a fan (34) which is arranged in the housing (28); a cleaning head (14) which is arranged on the device body (12) outside of the housing (28), comprises at least one cleaning roller (18), and is fluidically connected to the suction assembly device (32); an air-cooled drive motor (78) for rotating the at least one cleaning roller (18); and a process air conducting device (144) for process air of the suction assembly device (32). The drive motor (78) is arranged outside of the housing (28) of the device body (12), and a cooling air conducting device (112) for cooling air of the drive motor (78) has at least one fluid path which is arranged on or in the housing (28) and/or the cooling air conducting device (112) is coupled to the process air conducting device (114).

Description

Surface cleaning machine

The invention relates to a surface cleaning machine, comprising a device body with a housing, a suction unit with a fan, which is arranged in the housing, a cleaning head, which is arranged on the device body outside the housing, at least one cleaning roller and fluidly effective with the suction unit is connected, an air-cooled drive motor for rotational drive of the at least one cleaning roller, and a

Process air guiding device for process air of the suction device.

From WO 2013/027140 AI a cleaning device for cleaning a surface is known, which comprises a rotatable brush. There is further provided a rubber wiper member which is spaced from the brush and secured to an underside of a nozzle housing.

From WO 2013/027164 AI a cleaning device with a rotatable brush and a single rubber wiper element is also known.

From EP 2 177 128 AI a device for distributing fluid on a brush is known.

From DE 41 17 157 AI a method for cleaning or cleaning a preferably smooth surface is known in which the surface to be cleaned is wiped with a substantially flap-like wiper element receiving the dirt through the wiper element and then the soiled wiper element is moistened and then the dirt is sucked from the wiper element.

From WO 2010/140967 Al a method for cleaning a soiled surface is known. From CH 607 578 a connectable to a water pipe brush device is known.

EP 0 186 005 A1 discloses a brush-type suction mouthpiece provided with wheels.

From FR 2 797 895 a brush is known.

From US 2002/0194692 AI is a method for mechanical

Dirt removal from a surface known.

From WO 2013/11789 AI a cleaning head for a vacuum cleaner is known. From US 6,400,048 Bl, there is known a rotary brush apparatus in which a motor is disposed at a first end of a cylindrical body and a speed reduction mechanism is disposed at a second end of the cylindrical body. An electric fan is disposed outside the cylindrical body and serves to blow air into the cylindrical body to cool the engine.

The invention has for its object to provide a surface cleaning machine of the type mentioned, which has a high splash resistance with a simple structural design.

This object is achieved according to the invention in the surface cleaning machine mentioned above in that the drive motor is arranged outside the housing of the device body and that a cooling air guiding device for cooling air of the drive motor has at least one fluid path which is arranged on or in the housing, and / or that the

Cooling air guiding device is coupled to the process air guiding device. The drive motor is air-cooled. A cooling air inlet or cooling air outlet can be provided at a large distance from the at least one cleaning roller and, in particular, by a cooling air guiding device which has at least one channel through which the at least one fluid path is formed, which is arranged on or in the housing at and preferably provide in an upper region of the housing. As a result, a high splash protection for the area of the cleaning head can be obtained. The number of (air) openings at the near the cleaning head can be kept low.

If the cooling air guidance device is coupled to the process air guidance device, then fluid passages or openings can be used jointly for cooling air and process air. The number of inlets or outlets can be reduced.

Furthermore, the suction unit can be used to suck cooling air from the Kühiluftführungseinrichtung.

It is particularly advantageous if the process air guidance device and the cooling air guidance device have at least one common fluid path. As a result, for example, an outlet and / or an inlet can be used together for cooling air and process air. At simple

constructive design of the surface cleaning machine results in a high splash water resistance.

It is favorable if the cooling air guidance device has a cooling air inlet and a cooling air outlet, the process air guidance device has a process air inlet and a process air outlet, and the cooling air inlet and the process air inlet coincide and / or the cooling air outlet and the process air outlet coincide. As a result, the number of inlets or outlets and thus the air openings can be kept low. This results in a high splash protection for the surface cleaning machine. For the same reason, it is favorable if the process air outlet forms the cooling air outlet and / or the process air inlet forms the cooling air inlet.

In one embodiment, a cooling air inlet is provided

Process air inlet provided and provided a common outlet for cooling air and process air. The cooling air inlet and the process inlet are separate. As a result, only two inlets and one outlet in total must be provided for cooling air and process air.

It is advantageous if the cooling air inlet is arranged on the cleaning head or on a transition region from the cleaning head to the housing of the device body. This results in a short guide for supply air cooling air to the drive motor.

In particular, the process air inlet is formed by one or more suction ports on the cleaning head. It is advantageous if the cooling air inlet is arranged at a distance from the process air inlet and, in particular in a cleaning operation of the surface cleaning machine, is positioned above the process air inlet with respect to the direction of gravity. This results in an optimized Einkoppelbarkeit and in particular intake of fresh air cooling air.

In one embodiment, the process air outlet is arranged on the device body and in particular arranged on the housing of the device body and in particular arranged at a distance from the cleaning head and in particular arranged at a distance from the drive motor. As a result, process air can be released into the environment at a relatively large distance from the at least one cleaning roller. With appropriate coupling of the cooling air guiding device, exhaust air cooling air can also be released to the environment there. In one embodiment, the drive motor is disposed in a motor housing. The motor housing can be used for the flow guidance of cooling air.

In particular, the cooling air guidance device has at least one fluid path through the motor housing and preferably by the drive motor. It can thus achieve an optimized air cooling of the drive motor. It is advantageous if the motor housing is arranged in a sleeve. About the sleeve can be formed as an inner sleeve, for example, a joint over which the cleaning head is pivotable relative to the device body. The sleeve can also be used for flow guidance. In particular, a wall (and also a wall of a motor housing) can be used as a wall of one or more flow channels. This results in a simple structural design with ease of manufacture of the surface cleaning machine and high splash protection.

In particular, the cooling air guiding device has at least one fluid path which lies along the sleeve and / or between the sleeve and the or a motor housing. It can thereby be realized in a simple manner Zuluft- flow channels for supply air cooling air to the drive motor.

In particular, the cooling air guiding device has a first fluid path which runs along the sleeve and lies on an outer side of the sleeve, and has a second fluid path which runs along the sleeve along an inner side of the sleeve facing the motor housing. This results in a simple design of an optimized feedability of supply air cooling air to the drive motor.

In particular, the motor housing extends along an axial direction (which in particular coincides with a drive axis of the drive motor) between a first end and a second end and a Cooling air inlet of the cooling air guiding device is positioned relative to the axial direction between the first end and the second end of the surface cleaning machine. The cooling air inlet is positioned relative to the axial direction at the height of the motor housing. This results in a high spray water protection optimized feedability of supply air cooling air to the drive motor.

It is advantageous if the cleaning head is pivotable relative to the drive motor and in particular is pivotable relative to a sleeve, wherein in particular the sleeve forms a pivot bearing element. This makes it possible to clean corner areas in an advantageous manner, for example due to a pivotability of the device body relative to the at least one cleaning roller. The sleeve, in turn, can be used, for example, for the flow guidance of the cooling air guiding device. It is also possible, for example, to fix the drive motor to the device body via the sleeve and thereby to position it outside the housing.

In particular, the sleeve is rotatably connected to the device body. It is thus possible in a simple manner to realize a pivot bearing with a rotatability of the cleaning head relative to the device body.

In an advantageous embodiment, the cooling air guiding device is coupled to a suction region of the process air guiding device. At the suction region of the process air guiding device there is a corresponding negative pressure. This is generated by a blower of the suction unit. This negative pressure can be used to drive cooling air through the cooling air guiding device. As a result, for example, no fan for the drive motor must be provided to drive cooling air through the cooling air guiding device. This results in a structurally simple construction of the surface cleaning machine, wherein in comparison to a drive motor, which must drive a fan, the corresponding drive motor low power and thus can be dimensioned with low mass. In particular, at least one fluid path of the cooling air guiding device opens into at least one suction path of the process air guiding device. Advantageously, exhaust air from the cooling air guiding device can thereby be coupled into the process air guiding device, active cooling of the drive motor being realized and the necessary suction flow being generated by the blower of the suction device device which is present anyway.

In particular, the at least one suction path has at least one rib which is assigned to an opening of the at least one fluid path of the cooling air guiding device in the at least one suction path. The at least one rib is disposed in the suction path so as to be effective in preventing liquid droplets from the suction flow from entering the cooling air guiding device. In principle, the suction flow in the at least one suction path, into which the at least one fluid path of the cooling air guiding device is coupled, may still contain liquid droplets, wherein liquid droplets can in principle pass from the at least one suction path into the cooling air guiding device. By providing the at least one rib, which is arranged in particular before an orifice of the at least one fluid path of the cooling air guiding device in the at least one suction, at least a large part of liquid droplets can be prevented from penetrating into the cooling air guiding device. The at least one rib acts as a kind of aperture. In order to prevent the penetration of liquid droplets into the cooling air guiding device, it is further advantageous if a blocking element for a drop penetration from the at least one suction path into the cooling air guiding device is arranged at an opening of the cooling air guiding device in the at least one suction path. The blocking element serves to a

To prevent or at least reduce the penetration of drops.

In one embodiment, the blocking element has a region with which it projects into the at least one suction path, and is in particular as Tube (tube) is formed and in particular has an orifice, which is oriented obliquely to a main flow direction in the at least suction path. In particular, the at least one orifice is oriented at an acute angle to the main flow direction so that it is "receding", that is to say reduced with respect to the main flow direction, the distance of the orifice to the main flow direction. In particular, the blocking element is designed as a tube or tubes, for example, of a rubber material. The blocking element has over the projecting into the at least one suction channel region on a supernatant, which reduces the risk of droplet penetration.

It is also advantageous if at least one discharge channel for liquid opens into the at least one suction path, which leads in particular from an opening region of the cooling air guiding device into the at least one suction path to a collecting device for liquid. Liquid which would otherwise accumulate in this region of the suction path (in particular owing to at least one rib and / or a blocking element which are at least partially positioned in this region) can drain via the at least one outflow channel. The collecting device is then, for example, a tank device for dirty liquid or a separator. The at least one drainage channel prevents liquid from accumulating in the relevant region, which in turn could then enter the cooling air guiding device. In particular, the at least one fluid path of the cooling air guiding device, which opens into at least one suction path of the process air guiding device, is arranged downstream of the drive motor with respect to a cooling air flow. As a result, exhaust air cooling air of the drive motor, that is to say cooling air which has flowed through the drive motor or has flowed past it and has been heated, can be discharged in an optimized manner.

In particular, the at least one suction path of the process air-guiding device, in which the at least one fluid path of the cooling air-guiding device opens, upstream of the blower with respect to a suction air flow and in particular upstream of a separator or connected downstream of the separator. Through an upstream circuit in front of the blower, a suction flow of the blower can be used to provide a cooling air suction flow, which drives cooling air through the cooling air guiding device. When connecting a separator, the cooling air flow does not have to flow through the separator.

Advantageously, the suction unit on a blower motor for the fan, which is arranged on the housing. This drives one or more turbine wheels of the blower to produce a suction flow through which a region on the at least one cleaning roller is sucked. Furthermore, a negative pressure of the cooling air guiding device can be made possible.

It is advantageous if the drive motor is positioned on the cleaning head or is positioned at a transition region from the cleaning head to the housing. It can thereby be positioned relative to a normal mode of a cleaning operation relatively at a relatively low point of the surface cleaning machine. This results in a simple operation for an operator.

It is favorable if a drive axis of the drive motor and a rotation axis of the at least one cleaning roller are oriented transversely and in particular perpendicular to one another. This makes it possible, for example, to centrally store and drive the at least one cleaning roller and also to achieve a storage freedom at the edge regions of the at least one cleaning roller. In turn, a cleaning effect can also be achieved at the edge regions of the at least one cleaning roller.

It is favorable if a drive axis of the drive motor and a rotation axis of the at least one cleaning roller are oriented transversely and in particular perpendicular to one another. It is also advantageous if a transmission device is provided for transmitting torque from the drive motor to the at least one cleaning roller. By the transmission device can be achieved, for example, a speed reduction. Furthermore, a change in angle with respect to the torque guide can be achieved. A torque can be transmitted to the cleaning roller at an optimized location.

Furthermore, it is advantageous if the cleaning head is pivotably mounted on the device body via a hinge about a pivot axis. This results in improved cleaning options, especially in corners and peripheral areas.

It is provided that the pivot axis is oriented transversely to a longitudinal axis of the device body and in particular is oriented at an acute angle to the longitudinal axis and / or that a drive axis of the drive motor is at least approximately parallel or coaxial with the pivot axis. This results in extended cleaning options, especially in corners and peripheral areas.

It is particularly advantageous if a moistening device is provided for moistening the at least one cleaning roller with cleaning fluid. By moistening can be directly or indirectly moisten the at least one cleaning roller. In a direct moistening cleaning liquid is applied directly to the at least one cleaning roller. In indirect humidification cleaning liquid is applied to the surface to be cleaned. From there, then takes the at least one cleaning roller cleaning fluid. Cleaning liquid can be used to dissolve dirt on the surface to be cleaned and thus absorb it better.

It is furthermore advantageous if a tank device for cleaning fluid is arranged on the device body and / or a mounting device is mounted on the device body. receiving device for dirt and / or a tank device for dirty liquid is arranged. This results in a compact design of the surface cleaning machine optimized cleaning options. It is advantageous if, in a cleaning operation, the surface cleaning machine is supported only on the at least one cleaning roller on a surface to be cleaned. It can thereby realize the surface cleaning machine in a compact manner. Furthermore, a user-friendly cleanability can be achieved. For example, an operator then has to additionally support the surface cleaning machine in a cleaning operation only at a point spaced from the at least one cleaning roller (such as a handle).

It is also advantageous if an inlet for air and / or an outlet for air (a cooling air inlet, a process air inlet, a cooling air outlet, a

Process air outlet) has one or more slots or is formed by one or more slots. Such an inlet or outlet can be realized in a simple manner. It has one or more openings, wherein an opening is formed by a slot.

The following description of preferred embodiments is used in conjunction with the drawings for further explanation of the invention. 1 shows a perspective illustration of an embodiment of a surface cleaning machine according to the invention, which is placed on a surface to be cleaned for a cleaning operation; Figure 2 is a side view of the surface cleaning machine according to FIG

i; Figure 3 is a front view of the surface cleaning machine according to Figure i;

FIG. 4 shows a partial view of a device body and a cleaning head with a partially opened housing of the device body;

Figure 5 is a (partial) side view along the line 5-5 of Figure 3; Figure 6 is an enlarged view of a portion around a drive motor of Figure 5;

Figure 7 is an enlarged view of an area on a

Suction unit of Figure 5;

Figure 8 is a schematic representation of a cooling air guiding device for a drive motor and a process air guiding device of a suction unit, if they are not coupled together;

9 shows a schematic embodiment of an inventive

Solution in which the cooling air guiding device and the process air guiding device are coupled together; FIG. 10 shows a second schematic exemplary embodiment of a solution according to the invention with coupling of the cooling air guiding device to the process air guiding device; and another schematic embodiment for relative positioning of the cooling air guiding device and the process air guiding device. An embodiment of a surface cleaning machine 10 according to the invention (FIGS. 1 to 7) is designed as a floor cleaning machine for hard floors. 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.

In a cleaning process on a surface 16 to be cleaned, the surface cleaning machine 10 is supported by a cleaning roller 18 on the surface 16 to be cleaned. In one embodiment (Figure 1), a single cleaning roller 18 is provided.

It is also possible in principle that several cleaning rollers are provided.

The device body 12 has a longitudinal axis 20 (FIGS. 2, 3). The surface cleaning machine 10 is kept stubborn. For this purpose sits on the device body 12, a rod 22. This rod 22 extends in the longitudinal axis 20. At an upper portion of the rod 22, a handle 24 and in particular bow handle is arranged. An operator can hold on this handle with one hand the surface cleaning machine 10 and lead on the surface 16 to be cleaned.

On the handle 24 one or more controls are arranged. In particular, a switch 26 is arranged on the handle 24. About the switch 26, the surface cleaning machine 10 is switched on or off for a cleaning operation.

In particular, the control of the surface cleaning machine 10 is such that by actuation of the switch 26 all components necessary for the operation (generation of a suction flow by a suction unit, rotation of the cleaning roller 18, moistening of the cleaning roller 18 directly or indirectly) are actuated and a corresponding Turning off the switch 26 causes a synchronous turning off the operation of these components.

The rod can be height-displaceable along the longitudinal axis 20 or rigidly formed or rigidly arranged on the device body 12.

The device body 12 includes a housing 28 in which components of the surface cleaning machine are protected. In one embodiment, a hook device 30 is arranged on the rod 12 between the housing 28 and the handle 24, to which a power cord by wrapping on the rod 12 is fixable.

The cleaning head 14 with the cleaning roller 18 is arranged outside the housing 28.

The surface cleaning machine 10 comprises a suction aggregate device, indicated as a whole by 32. This suction unit 32 is used to generate a suction flow in order to perform an extraction on the cleaning roller 18 can.

The suction unit 32 includes a fan (suction fan) 34, which is arranged in the housing 28. The blower 34 in turn is driven by a blower motor 36. The blower motor 36 is disposed in the housing 28. He is in particular an electric motor.

The suction unit 32 is associated with a separator 38. This is also positioned in the housing 28. The separator separates solid from liquid components in a suction stream.

The separator 38 is associated with a tank means 40 for dirty liquid. This sits removably on the housing 28th On the housing 28 also removably seated a tank means 42 for cleaning fluid. The cleaning fluid is especially water or a mixture of water and detergent. (FIG. 4 shows a partial view with the housing 28 open and with the tank device 42 removed.)

The suction unit 32 is fluidly connected to (at least) a suction channel 44 (Figure 7), which is guided by the blower 34 on the device body 12 through the housing 28 to the cleaning head 14.

The suction channel 44 has a first region 46 which is positioned on the housing 28. In one exemplary embodiment, a branch (not visible in the drawings) located at the first region 46 in the housing 28 branches off to a second region 50 and a third region 52 of the suction channel 44. The suction channel 44 is split via the branch and the second region 50 and the third region 52 into two subchannels. The second area 50 and the third area 52 are each led to the cleaning head 14. The second region 50 and the third region 52 are at least partially outside the housing 28.

It is also possible in principle that the branch sits outside of the housing 28. In this case, then in particular the second area 50 and the third area 52 are completely outside the housing 28. At the cleaning head 14 of the cleaning roller 18 facing at least one suction port 54 is assigned. For example, at least one suction orifice is assigned to the second region 50 and the third region 52. On the cleaning roller 18, a stocking 56 is arranged. This is in particular fixed on a sleeve 58, which has a cylindrical shape. In one embodiment, the at least one suction orifice has a first orifice wall and a second, spaced orifice wall. Between the mouth wall and the second mouth wall, the respective suction mouth 54 is formed. The first mouth wall is located above the second mouth wall when the cleaning roller 18 is placed on the surface 16 to be cleaned. The first orifice wall and / or the second orifice wall rest on the stocking 56 of the cleaning roller 18 or protrude into the stocking 56. A corresponding mouth training is described in WO 2015/086083 AI. This document is expressly and fully incorporated by reference.

It is fundamentally possible for the second area 50 and the third area 52 to have their own suction mouth 54, or a common suction mouth for the second area 50 and the third area 52 of the suction channel 44 can be provided. This one suction mouth 54 then has two suction points over the second region 50 and the third region 52.

In principle, the suction channel guide from the suction unit 32 to the cleaning head 14 may also be designed without branches and comprise a plurality (in particular two) of suction channels, which are then guided from the housing 28 to the cleaning head 14.

The cleaning head 14 is held on the device body 12 outside the housing 28 via a hinge 62 pivotally about a pivot axis 64 (Figure 2). The pivot axis 64 is transverse to the longitudinal axis 20 of the device body 12. It lies in particular at an acute angle 66 (Figure 2). The acute angle 66 is in particular in the range between 15 ° and 35 °. In one embodiment, the acute angle 66 is about 25 °.

The pivot axis 64 is transverse and in particular perpendicular to a rotation axis 68 of the cleaning roller 18th The cleaning roller 18 has a longitudinal axis 70. The longitudinal axis 70 is in particular coaxial with the axis of rotation 68. The pivot joint comprises an (inner) sleeve 72 (FIGS. 6 and 7) which is arranged at the acute angle 66 to the longitudinal axis 20 on the device body 12, in accordance with the orientation of the pivot axis 64. This inner sleeve 72 is in particular rigidly fixed to the device body 12. The cleaning head 14 has an outer sleeve 74, which is mounted on the inner sleeve 72. A corresponding locking device ensures that the outer sleeve 74 with respect to the inner sleeve 72 in the direction of the pivot axis 64 is immovable. The inner sleeve 72 has a cylindrical outer contour in one embodiment. The outer sleeve 74 has a cylindrical inner contour. The joint 62 is designed as a sliding joint, wherein the outer sleeve 74 is rotatably mounted on the inner sleeve 72.

Basically, a pivoting can be provided by a full 360 ° angle. For example, in one embodiment, the pivotability is limited to a range of ± 45 ° or ± 90 °.

A fluid line, which forms the second region 50 and the third region 52, is correspondingly elastically formed, and in particular designed as a hose, in order to allow a pivoting of the cleaning head 14 on the joint 62.

For rotary drive of the cleaning roller 18, a drive device 76 is provided with a drive motor 78. The drive motor 78 is in particular an electric motor.

The drive motor 78 has a motor housing 79. In the motor housing 79, the corresponding components of the drive motor (in particular Rotor and stator). The motor housing 79 is positioned in the inner sleeve 72.

The drive motor 78 has a motor shaft 80. The motor shaft 80 has a drive axis 82. The drive axis 82 is parallel and in particular coaxial with the pivot axis 64.

The drive motor 78 with its motor housing 79 sits firmly in the inner sleeve 72 and is thereby fixed to the device body 12. It is placed at a transition from the device body 12 to the cleaning head 14; it is positioned on the hinge 62. It is located in a space-saving manner and thus also sits on the cleaning head 14. It is based on a focus of the surface cleaning machine 10 in the vicinity of the cleaning roller 18. The drive motor 78 is supplied, for example via mains current with electrical energy.

The drive axis 82 of the drive motor 78 and the axis of rotation 68 of the cleaning roller 18 are oriented transversely to one another and in particular oriented perpendicular to one another.

For torque transmission from the drive motor 78 to the cleaning roller 18, the drive device 76 includes a transmission device 84. In one embodiment, the transmission device 84 includes a speed reducer 86. The speed reducer 86 serves to reduce a rotational speed in comparison to the rotational speed of the motor shaft 80.

The drive motor 78 is, for example, a standard electric motor which has, for example, an (initial) speed of the order of 7000 revolutions per minute. The speed reducer 86 provides a reduction in speed to, for example, about 400 revolutions per minute. In particular, the speed reducer 86 is arranged directly on the drive motor 78, that is to say arranged in the direction of the cleaning roller 18 next to it. It can still be arranged in the inner sleeve 72 or outside this.

In one embodiment, the speed reducer 86 is formed as a planetary gear. The transmission device 84 of the drive device 76 also has an angle gear 88. This provides a torque deflection to cause a drive of the cleaning roller 18 as the axis of rotation 68 transverse to the drive axis 82 of the drive motor 78. The angle gear 88 is in particular the speed reducer 86 downstream.

In one embodiment, the angle gear 88 has one or more gears that are non-rotatably coupled to a corresponding shaft of the speed reducer 86. These act on a bevel gear to

Angle conversion.

The cleaning head 14 has a first end face 90 and an opposite second end face 92 (see FIG. 1). Extending between the first end face 90 and the second end face 92 is a housing 94 of a cleaning roller holder 96. This housing 94 partially surrounds a cleaning roller 18 in the form of a half-shell held against it, wherein an encompassing is such that the cleaning roller 18 is provided with a significant amount Proportion of their stocking 56 protrudes for a cleaning process and according to the trim 56 can contact the surface 16 to be cleaned. In one embodiment, a sweeping element is arranged on the housing 94 of the cleaning roller holder 96, which serves for the entry of coarse dirt for driving through the cleaning roller. In a central region 100 of the cleaning roller holder 96, which is located centrally between the first end face 90 and the second end face 92, a drive element 102 is arranged. This drive element 102 is in particular connected to a shaft 104 of the cleaning roller 18 or is this shaft 104 itself. The drive element 102 is torque-effectively connected to the transmission device 84.

In one embodiment, the drive element 102 is coupled to the angle gear 88 via a belt 106. The drive element 102 is spaced apart from the angle gear 88. The belt 106 bridges this distance and causes a drive of the drive element and thus a rotation of the cleaning roller 18 about the axis of rotation 68.

In one embodiment (see Figure 1), the cleaning roller is formed in two parts with a first part and a second part. The first part and the second part each sit on the shaft 104, being spaced apart in the central region 100. There is no stocking 56 in the middle area. There is a gap 108 formed on the cleaning roller 18. This gap 108 is formed relatively narrow and has a much smaller width than a length of the cleaning roller 18 in the longitudinal axis 20. In the gap 108 of the belt 106 is guided. The belt 106 is set back relative to an outer side of the cleaning roller 18 also relative to a position in which the stocking 56 is compressed due to a placement of the cleaning roller 18 on the surface 16 to be cleaned.

The surface cleaning machine 10 comprises a moistening device 110 for moistening the cleaning roller 18. The moistening device 110 can be used to apply cleaning fluid directly or indirectly to the cleaning roller 18. In a direct application cleaning liquid from the tank means 42 is applied directly to the cleaning roller 18 (on the stocking 56). In an indirect application cleaning liquid is applied to the surface 16 to be cleaned. To be cleaned from ing surface 16 then takes the stocking 56 of the cleaning roller 18 cleaning fluid. It is also possible in principle that only a direct application, only an indirect application, or a combination of direct and indirect application is provided.

In the not previously published German patent application

No. 10 2014 114 809.6 of 13 October 2014, an embodiment of a humidifying device is described, which is coupled to the suction unit 32.

In particular, the moistening device comprises at least one pressure-controlled switch, which releases a fluid path for cleaning fluid to the at least one cleaning roller in an open position and blocks the fluid path in a closed position, wherein the at least one pressure-controlled switch is pressure-effectively coupled to the suction channel 44 and at one a suction flow with the at least one suction channel effected negative pressure, the at least one pressure-controlled switch in the open position and / or holds the open position. This application is expressly and fully incorporated by reference.

The drive motor 78 is air-cooled. For cooling air guidance designated as a whole with 112 cooling air guide means is provided (Figures 5 to 11).

The cooling air guiding device 112 has a cooling air inlet 114. At this air is coupled into the surface cleaning machine for cooling the drive motor 78. The cooling air inlet 114 is formed by one or more openings, which are formed for example as slots. In one embodiment, the cooling air inlet 114 is formed at a transition region of the housing 28 to the cleaning head 14 and in particular to the outer sleeve 74. The cooling air inlet 114 is thereby bounded on one side by the housing 28 and to the other side through the outer sleeve 74th

The region of the housing 28 which delimits the cooling air inlet 114 or on which the cooling air inlet is formed is, in particular, a region 116 which holds the cleaning liquid tank means 42.

The cooling air inlet 114 is arranged in particular at a transition region of the housing 28 to the cleaning head 14. The cooling air guiding device 112 has one or more channels 118 through the motor housing 79 via corresponding one or more channels. Accordingly, an inlet 120 on the motor housing 79 is fluidly coupled to the cooling air inlet 114. In one embodiment, the cooling air guiding device 112 has a first channel 122 or a plurality of first channels 122, which are connected directly to the cooling air inlet 114 and thereby extend in the direction of the housing 28. To one side is or are the channels 122 bounded by the inner sleeve 72.

Furthermore, one or more second channels 124 are provided, which run at least approximately parallel to the first channel or channels 122. Between the one or more first channels 122 and the one or more second channels 124, a deflection region 126 is arranged. The one or more second passages 124 are located between the inner sleeve 72 and the motor housing 79. The one or more inlets 120 into the motor housing 79 are located on the one or more second passages 124. At least one first fluid path 128a is provided by the one or more first channels 122. At least one second fluid path 128b is provided by the one or more channels 124. A main flow in the second fluid path 128 b is at least approximately indirectly parallel to a main flow in the first fluid path 128

Cooling air inlet 114 coupled into the first fluid path 128a. There is a diversion from the first fluid path 128a in the deflection region 126 in the second fluid path 128b. From there, cooling air is then coupled into the motor housing 79 via the inlet 120.

The cooling air guiding device 112 also has at least one channel 130, which is guided on the exhaust air side by the drive motor 78 to the device body 12 and is thereby guided through the housing 28. The (at least one) channel 130 is oriented in particular parallel to the longitudinal axis 70.

In one exemplary embodiment, it is arranged on the device body 12 in the housing 28 behind the tank means 42 for cleaning liquid (see FIG. 4). If the cleaning liquid tank device 42 is positioned on the apparatus body 12, then this at least one channel 130 is covered towards a front side of the surface cleaning machine 10 (see also FIG. 7). It can be provided that a collector 132 for cooling air, which has flowed through the drive motor 78, is arranged on the drive motor 78 and in particular on the motor housing 79. To the collector 132, the channel 130 is then connected. The collector 132 is funnel-shaped, for example, to a port 134 for the channel 132. The channel 130 of the cooling air guiding device 112 is fluidly connected to a cooling air outlet 136. The cooling air outlet 136 has one or more openings, which are formed, for example, as slots. Via the cooling air outlet, "spent" cooling air, which has been heated by passing the motor 78, is discharged to the environment.

In one embodiment, it is provided that the cooling air outlet 136 is positioned in an upper region 138 of the housing 28 and is in particular positioned at a height which is at or above an upper side 140 of the cleaning liquid tank means 42.

Through the channel 130, a suction snorkel is provided, so to speak, is discharged through the heated cooling air at a relatively large distance from the drive motor 78 to the environment.

The motor housing 79 extends axially (parallel to the drive axis 82) between a first end 142a and a second end 142b. Based on this axial direction between the first end 142a, 142b, the cooling air inlet 114 is located at the level of the drive motor 78, that is, lies in a transverse plane to the drive axis 82, this transverse plane between the first end 142a and the second end 142b is positioned.

The cooling air outlet 136 when the surface cleaning machine 10 is placed on the surface 16 to be cleaned and held by an operator on the handle 24, spaced from the cooling air inlet 114, wherein the distance of the cooling air outlet 136 to the to be cleaned surface 16 is a multiple of the distance of the cooling air inlet 114 to the surface 16 to be cleaned. In particular, the distance between the cooling air outlet 136 and the axis of rotation 68 relative to the longitudinal axis 20 is at least three times the distance of the cooling air inlet 114 to the axis of rotation 68 with respect to the longitudinal axis 20. In a preferred embodiment, the cooling air guiding device 112 is coupled to a process air guiding device 144 of the suction device 32. The process air guiding device 144 has a process air inlet 146. This process air inlet 146 is formed via the suction orifice 54 or the suction orifices 54.

The process air guiding device 144 further comprises the suction channel (s), which lead from the suction orifices 54 to the blower 34.

In the embodiment shown, the process air guiding device 144 comprises the suction channel 44 with the regions 46, 50 and 52. The process air guiding device furthermore has a process air outlet 148, which is arranged in particular on the housing 28 in the area of the blower 34.

The process air outlet 148 has one or more openings, which are formed in particular by slots. About him is "spent"

Process air released to the environment.

The process air guiding device 144 has (at least) a suction path 150, in which negative pressure conditions prevail in a cleaning operation. The at least one suction path 150 is formed in particular in the first region 46.

It is provided that the cooling air guiding device 112 is coupled to the process air guiding device 144.

As a result, the cooling air guiding device 112 and the process air guiding device 144 have one or more common fluid paths. It is envisaged that at least one of the inlets or outlets will be eliminated. In the embodiment shown, a cooling air outlet is then formed by the process air outlet 148. It is no longer necessary to provide a separate cooling air outlet.

The at least one channel 130 opens into the suction channel 44 and thereby into the suction path 150.

A corresponding mouth region 152 lies in particular in the height of the suction device 32.

In one exemplary embodiment, this mouth region 152, which is a coupling region of the cooling air guiding device 112 into the process air guiding device 144, follows the separator 38. As a result, cooling air, which is formed by a pure air flow, does not have to pass through the separator 38.

In principle, it is also possible that the corresponding injection point (the mouth region 152) is connected upstream of the separator 38.

In one embodiment, at least one rib 170 is positioned in the suction path 150 associated with the mouth region 152. For example, the fin 170 is aligned parallel to a main flow direction of the suction flow in the suction path 150, the main flow direction being particularly substantially parallel to the longitudinal axis 20.

The fin 170 is arranged and configured to influence the penetration of liquid droplets from the suction path 150 into the cooling air guiding device 112, and is influenced in such a way that fewer droplets at the mouth region 152 can penetrate into the cooling air guiding device 112. The suction flow in the suction path 150 may include liquid droplets. It is the goal to prevent the penetration of liquid droplets from the suction flow into the cooling air guiding device 112 at the mouth region 152 as far as possible.

The rib 170 is a type of orifice which shields, to some extent, an orifice 174 of the orifice area 152.

The rib 170 may advantageously also be arranged and designed such that an air flow out of the cooling air guiding device 112 as it flows into the suction path 150 passes through it and in particular is deflected.

At the mouth region 152, a blocking element 176 is arranged. The blocking element 176 is connected in the mouth region 152 to the channel 130 and has a region 178, with which it projects into the suction path 150. This region 178 forms a projection of the cooling air guiding device 112 in the suction path 150. The blocking element 176 is, for example, a tube (tube). It is preferably made of a rubber material. The mouth 174 of the cooling air guide device 112 is located on the region 178 of the locking element 176. The mouth 174 is thereby spaced from a wall 180, at which the channel 130 ends. It protrudes into the Saugweg 150.

The rib 170 is associated with the mouth 174. It is arranged and designed such that the main flow of the suction flow in the main flow direction 172 does not directly act on the orifice 174. An orifice 182 of the orifice 174 is oriented obliquely to the main flow direction 172; it is oriented at an acute angle. The orientation is such that the distance to the main flow direction 172 (or the longitudinal axis 20) in the main flow direction direction 172 enlarged. The orifice 182, as it were, is away from the main flow in the main flow direction 172.

The blocking element 176 also ensures that the risk of liquid drops from entering the cooling air guiding device 112 (into the channel 130) is reduced.

In a region 186 (junction region) of the suction path 150 which lies at the mouth region 152, a drainage channel 188 for liquid opens. The drain channel 188 leads downward from the junction area 186 with respect to the direction of gravity when in a normal mode of operation the surface cleaning machine 10 is placed over the cleaning roller 18 on the surface 16 to be cleaned. Through the drainage channel 188, liquid that would otherwise accumulate in the region 186 may drain.

This also reduces the risk of liquid ingress from the suction channel 150 into the cooling air guide 112.

The drain channel 188 leads to a collection device for liquid. The collecting device for liquid can be a collector, which is correspondingly fluid-effectively connected to the tank device 40 for dirty liquid, or the tank device 40 can itself represent such a collecting device. It is also possible that the drainage channel 188 leads to the separator 38 or leads to a fluid path of the suction unit 32, which is connected upstream of the suction path 150, wherein a separator stage is interposed accordingly.

The (at least one) rib 170, the blocking element 180 and the drainage channel 188 contribute to greatly reducing the risk of liquid drops from the suction flow in the suction channel 150 into the cooling air guiding device 112 at the mouth region 152. Subsequent to this mouth region 152, the process air guidance device 144 and the cooling air guidance device 112 have the same fluid paths. The blower 34 forms a drive for the flow of cooling air through the cooling air guiding device 112. Cooling air is sucked through the cooling air guiding device 112 through the mouth region 152, which opens into the suction path 150, driven by the blower 34. In the above example, in which the cooling air outlet 136 is separate from the process air guide 144, in particular, the drive motor 78 has a fan for cooling air to drive cooling air through the cooling air guide 112. FIG. 8 schematically shows an arrangement in which the cooling air guiding device 112, which is assigned to the drive motor 78, and the process air guiding device 144, which is assigned to the suction device 32, are completely separate from one another. FIG. 9 schematically shows the solution according to the invention described above. Cooling air is coupled via the cooling air inlet 114 in the surface cleaning machine 10, the drive motor 78 supplied to the air cooling. Discharged cooling air is coupled into the process air guiding device 144 and decoupled together with process air at the process air outlet 148.

Basically, the direction of flow is reversible; this is shown in Figure 9 by the arrows in broken lines. It is possible in principle for a common inlet for cooling air and process air to be provided instead of a common outlet for cooling air and process air. It is then decoupled from the process air cooling air and fed to the drive motor 78. The above-described cooling air inlet 114 then forms a cooling air outlet. In principle, it is also possible, as indicated in FIG. 10, that the corresponding system of the air guide with the cooling air guiding device 112 and the process air guiding device 114 has only one inlet 154 and only one outlet 156. Air is introduced via the inlet, which is initially used as process air. This air is then supplied as cooling air to the drive motor 78 and discharged at the outlet 156 back into the environment.

It is basically the direction of flow reversible, that is, the roles for the inlet 154 and outlet 156 are reversed. It is first coupled with air, which is then supplied to the drive motor 78 as cooling air. According to the drive motor 78 discharged air is then used as process air for the suction unit 32. In Figure 11, the embodiment with the cooling air outlet 136 is shown schematically. The channel 130 allows, in the manner of a snorkel, a positioning of the outlet 134 at a great distance from the cooling air inlet 114. The solution according to the invention makes it possible to achieve a type of bypass cooling of the drive motor 78.

In particular, cooling air from the drive motor 78 is coupled into the process air guiding device 144. The blower 34 of the suction device 32 provides for a corresponding intake of cooling air of the cooling air guiding device 112. Exhaust air of the drive motor 78 is coupled into the process air duct and discharged together with process air exhaust air to the environment. The inventive solution, the number of openings that are needed for cooling air, in the immediate vicinity of the cleaning head 14 can be kept low. As a result, a high splash protection is achieved. In the embodiment in which the cooling air guiding device 112 is coupled to the process air guiding device 144, the fan 34 with its fan motor 36 can provide a suction drive via which the drive motor 78 can be actively cooled by means of cooling air. The corresponding process air outlet 148 is also a cooling air outlet which can be positioned far from the cleaning roller 18 on the surface cleaning machine (relative to a cleaning operation). As a result, a high splash water resistance can be achieved. (The outlet region of the process air-guiding device 144 is anyway moisture-resistant.)

By means of the solution according to the invention, a cooling air outlet can be positioned far away from the cleaning roller 18 and far away from the surface 16 to be cleaned in the case of a proper cleaning operation. In principle, the number of outlets can also be reduced if a cooling air outlet coincides with a process air outlet.

Due to the driven driving through of cooling air through the cooling air guiding device 112 by means of the blower 34, no fan has to be provided for the drive motor 78. As a result, it can be dimensioned with a lower power consumption and, in particular, also be realized with lower mass.

The surface cleaning machine 10 of the present invention operates as follows. For a cleaning operation, the surface cleaning machine 10 is as shown in FIG

Figure 1 shown, supported on the cleaning roller 18 on the surface 16 to be cleaned. An operator stands on the surface to be cleaned 16 behind the surface cleaning machine 10 and holds it, for example, one-handed to the handle 24th

The operator may perform a forward thrust in the forward direction 158. In a cleaning operation, the suction fan 34 generates a suction flow, which in the suction channel 44 and thus in the areas 46, 50 and 52 causes a negative pressure relative to the outer space 160. In the variant in which the cooling air guiding device 112 to the

Process air guide device 140 is coupled, this suction flow also causes a suction of cooling air at the cooling air inlet 114 with flow through the cooling air guide means 112, which opens into the mouth 150 in the mouth 152.

The drive motor 78 generates a torque, which is transmitted to the cleaning roller 18 via the transmission device 84. This is driven by rotation. It is driven in particular in the counterclockwise direction (indicated in Figure 1 by the reference numeral 162) rotating.

In principle, provision may be made for a peripheral speed of the cleaning roller to be adjustable by an operator or for it to be fixed. The cleaning roller 18 has the trim 56, which is compressible. The trim 56 is in particular made of a textile material.

By means of the moistening device 110, for example, the cleaning roller 18 is moistened directly with cleaning fluid from the tank device 42. In one embodiment, this liquid admission is pump-free and in particular free of magnetic valves.

By specifying an angular position 164 (see FIG. 1), an operator can make a corresponding adjustment in order to allow cleaning, for example, under furniture or the like.

By cleaning liquid dirt is softened on the surface to be cleaned and can then be taken over the cleaning roller 18. About the process air inlet 146 (the suction port or suction ports 54) there is an extraction by means of the produced suction flow. At the separator 38 is a separation into solid dirt particles and liquid. Dirty liquid is collected in the tank device 40.

By the joint 62, for example, a machine corner cleaning or edge cleaning can be performed. The device body 12 is pivotable relative to the cleaning head 14 about the pivot axis 84 in the pivoting range.

Relatively heavy drive motor 78 is located low down close to cleaning roller 18 with respect to a normal operating mode and is positioned at least partially against hinge 62 to save space. A cooling air outlet can in turn be positioned far apart from the cleaning roller 18.

About a sweeping coarse dirt sweeping, which is then entrained by the cleaning roller 18.

LIST OF REFERENCE NUMBERS

Surface cleaning machine

device body

cleaning head

Area to be cleaned

cleaning roller

longitudinal axis

Rod

Handle

switch

casing

hook device

Saugaggregateinrichtung

fan

blower motor

separators

Tank system for dirty liquid Tank system for cleaning liquid Suction channel

First area

Second area

Third area

suction mouth

trimming

shell

joint

swivel axis

acute angle

axis of rotation

longitudinal axis

(Inner) sheath 74 outer sleeve

76 drive device

78 drive motor

79 Motor housing

80 motor shaft

82 drive axle

84 gear device

86 speed reducer

88 angular gear

90 First face

92 Second end face

94 housing

96 cleaning roller holder

100 Mid range

102 drive element

104 wave

106 straps

108 gap

110 moistening device

112 cooling air guiding device

114 cooling air inlet

116 area

118 fluid path

120 inlet

122 First channel

124 Second channel

126 deflection area

128a First direction

128b Second direction

130 channel

132 collectors

134 connection

136 Cooling air outlet 138 Upper area

140 top

142a First end

142b Second end

144 process air guiding device

146 process air inlet

148 process air outlet

150 suction path

152 mouth area

154 inlet

156 outlet

158 forward direction

160 outdoor space

162 counterclockwise

164 angular position

170 rib

172 main flow direction

174 estuary

176 blocking element

178 area

180 wall

182 mouth opening

184 sharpener angle

186 area

188 drainage channel

Claims

claims

Surface cleaning machine comprising a device body (12) with a housing (28), a suction unit (32) with a fan (34) which is arranged in the housing (28), a cleaning head (14) which on the device body ( 12) outside the housing (28) is arranged, at least one cleaning roller (18) summarized and fluidly connected to the suction unit (32), an air-cooled drive motor (78) for rotatably driving the at least one cleaning roller (18), and a Process air guiding device (144) for process air of the suction device (32), characterized in that the drive motor (78) is arranged outside the housing (28) of the device body (12) and that a cooling air guide device (112) for cooling air of the drive motor ( 78) has at least one fluid path, which is arranged on or in the housing (28), and / or that the cooling air guiding device (112) to the process air guiding device (114) is coupled.

Surface cleaning machine according to claim 1, characterized in that the process air guiding device (144) and the cooling air guiding device (112) have at least one common fluid path.

Surface cleaning machine according to claim 1 or 2, characterized in that the cooling air guiding device (112) has a cooling air inlet (114) and a cooling air outlet (148) that the process air guiding device (144) a process air inlet (146) and a process air outlet (148) and that the cooling air inlet (114) and the process air inlet (146) coincide and / or that the cooling air outlet (136) and the process air outlet (148) coincide.

4. Surface cleaning machine according to claim 3, characterized in that the process air outlet (148) forms the cooling air outlet (136) and / or the process air inlet forms the cooling air inlet.

5. surface cleaning machine according to claim 3 or 4, characterized by a cooling air inlet (114), a process air inlet (146) and a common outlet (148) for cooling air and process air.

6. surface cleaning machine according to one of claims 3 to 5, characterized in that the cooling air inlet (114) on the cleaning head (14) or at a transition region from the cleaning head (14) to the housing (28) of the device body (12) is arranged.

7. surface cleaning machine according to one of claims 3 to 6, characterized in that the process air inlet (146) through one or more suction ports (54) on the cleaning head (14) is formed.

8. surface cleaning machine according to claim 7, characterized in that the cooling air inlet (114) spaced from the process air inlet (114) is arranged and in particular in a cleaning operation of the surface cleaning machine with respect to the direction of gravity (g) above the process air Inlet (146) is positioned.

9. surface cleaning machine according to one of claims 3 to 8, characterized in that the process air outlet (148) on the device body (12) is arranged and in particular on the housing (28) of the device body (12) is arranged, and in particular spaced from the cleaning head (14) is arranged, and in particular spaced from the drive motor (78) is arranged.

10. Surface cleaning machine according to one of the preceding claims, characterized in that the drive motor (78) in a motor housing (79) is arranged.

11. Surface cleaning machine according to claim 10, characterized in that the cooling air guiding device (112) has at least one fluid path through the motor housing (79).

12. Surface cleaning machine according to claim 10 or 11, characterized

in that the motor housing (79) is arranged in a sleeve (72).

13. Surface cleaning machine according to claim 12, characterized in that the cooling air guiding device (112) has at least one fluid path which lies along the sleeve (72) and / or between the sleeve (72) and the or a motor housing (79) ,

14. A surface cleaning machine according to claim 13, characterized in that the cooling air guiding means (112) has a first fluid path (128a) which runs along the sleeve (72) and lies on an outer side of the sleeve (72), and a second fluid path (128b) which runs along the sleeve (72) along an inner side of the sleeve facing the motor housing (79).

15. Surface cleaning machine according to one of claims 10 to 14,

characterized in that the motor housing (79) extends along an axial direction between a first end (142a) and a second end (142b) and a cooling air inlet (114) of the cooling air guide (112) with respect to the axial direction between the first End (142a) and the second end (142b) is positioned on the surface cleaning machine.

16. Surface cleaning machine according to one of the preceding claims, characterized in that the cleaning head (14) relative to the drive motor (78) is pivotable and in particular relative to a sleeve (72) is pivotable, in particular the sleeve (72) a

Swivel bearing element forms.

17. surface cleaning machine according to claim 16, characterized in that the sleeve (72) rotationally fixed to the device body (12) is connected.

18. Surface cleaning machine according to one of the preceding claims, characterized in that the cooling air guiding device (112) is coupled to a suction region (150) of the process air guiding device (146).

19. Surface cleaning machine according to claim 18, characterized in that at least one fluid path of the cooling air guiding device (112) opens into at least one suction path (150) of the process air guiding device (146).

20. surface cleaning machine according to claim 19, characterized in that the at least one suction path (150) has at least one rib (170) which an orifice (174) of the at least one fluid path of the cooling air guiding device (112) in the at least one suction path (150 ) assigned.

21. Surface cleaning machine according to claim 19 or 20, characterized

characterized in that at a mouth of the cooling air guiding device (112) in the at least one suction path (150) a blocking element (176) for a drop penetration from the at least one suction path (150) in the cooling air guide means (112) is arranged.

22. surface cleaning machine according to claim 21, characterized in that the blocking element (176) has a region (178), with which it projects into the at least one suction path (150) and is in particular designed as a tube and in particular a mouth opening (182). which is oriented obliquely to a main flow direction (172) in the at least one suction path (150).

23. Surface cleaning machine according to one of claims 19 to 22,

characterized in that in the at least one suction path (150) at least one discharge channel (188) opens for liquid, which in particular from a junction region (186) of Kühlluftführungs- device (112) in the at least one suction path (150) to a collecting device for liquid leads.

24. Surface cleaning machine according to one of claims 19 to 23,

characterized in that the at least one fluid path of the cooling air guiding device (112), which opens into at least one suction path (150) of the process air guiding device (144), is arranged downstream of the drive motor (78) with respect to a cooling air flow.

25. Surface cleaning machine according to one of claims 19 to 24,

characterized in that the at least one suction path (150) of the process air guiding device (146), into which the at least one fluid path of the cooling air guiding device (112) opens, upstream of the fan (34) with respect to a suction air flow and in particular a separator (38) is connected upstream or downstream of the separator (38).

26. surface cleaning machine according to one of the preceding claims, characterized in that the suction unit means (32) comprises a blower motor (36) for the fan (34), which in the housing (28) is arranged.

27. surface cleaning machine according to one of the preceding claims, characterized in that the drive motor (78) is positioned on the cleaning head (14) or at a transition region from the cleaning head (14) to the blower (28) is positioned.

28. Surface cleaning machine according to one of the preceding claims, characterized in that a drive axis (82) of the drive motor (78) and a rotation axis (68) of the at least one cleaning roller (18) are oriented transversely and in particular perpendicular to each other.

29. surface cleaning machine according to one of the preceding claims, characterized in that a transmission device (84) for transmitting torque from the drive motor (78) on the at least one cleaning roller (18) is provided.

30. surface cleaning machine according to one of the preceding claims, characterized in that the cleaning head (14) via a hinge (62) about a pivot axis (64) pivotally mounted on the device body (12) sits.

31. surface cleaning machine according to claim 30, characterized in that the pivot axis (64) is oriented transversely to a longitudinal axis (20) of the device body and in particular at an acute angle (66) to the longitudinal axis (20) is oriented and / or a drive shaft (82) of the drive motor (78) is at least approximately parallel or coaxial with the pivot axis (64).

32. Surface cleaning machine according to one of the preceding claims, characterized by a moistening device (110) for moistening the at least one cleaning roller (18) with cleaning liquid. Surface cleaning machine according to one of the preceding claims, characterized in that on the device body (12) a tank means (42) is arranged for cleaning liquid and / or that on the device body (12) has a receiving means for dirt and / or a tank means (40) is arranged for dirty liquid.

Surface cleaning machine according to one of the preceding claims, characterized in that in a cleaning operation, the surface cleaning machine is supported only on the at least one cleaning roller (18) on a surface to be cleaned (16).

Surface cleaning machine according to one of the preceding claims, characterized in that an air inlet (114; 146) and / or an air outlet (136; 148) has one or more slots or is formed by one or more slots.