Floor cleaning device with a sweeping device and method for operating a floor cleaning device

Abstract

The invention relates to a floor cleaning device comprising a floor head (12), wherein the floor head (12) defines a contact plane (26) for a floor (16) to be cleaned, at least one cleaning roller unit (28) which is arranged on the floor head (12) and can be rotated about an axis of rotation (94), a drive motor (90) for a rotational movement of the at least one cleaning roller unit (28), and a sweeping device (202) for coarse dirt which is associated with the at least one cleaning roller unit (28) and which is arranged on the floor head (12), wherein the sweeping device (202) has at least one sweeping element (206) which is spaced apart from the contact plane (26) with an underside (210) in a vertical direction (52) perpendicular to the contact plane (26), wherein a through-passage (212) is formed between the at least one sweeping element (206) and the contact plane (26), and the at least one sweeping element (206) is spatially in front of the at least one cleaning roller unit (28) in relation to a main direction of travel (24) of the floor head (12) during a cleaning process on the floor (16) to be cleaned.

Description

[0001] Floor cleaning device with sweeping device and method for operating a floor cleaning device

[0002] The invention relates to a floor cleaning device comprising a floor head, wherein the floor head defines a setup plane for a floor to be cleaned, at least one cleaning roller unit which is arranged on the floor head and is rotatable about a rotation axis, a drive motor for a rotational movement of the at least one cleaning roller unit, and a sweeping device for coarse dirt which is assigned to the at least one cleaning roller unit and which is arranged on the floor head.

[0003] Furthermore, the invention relates to a method for operating a floor cleaning device, comprising a floor head, wherein the floor head defines a setup plane for a floor to be cleaned, at least one cleaning roller unit which is arranged on the floor head and is rotatable about a rotation axis, a drive motor for a rotational movement of the at least one cleaning roller unit, and a sweeping device for coarse dirt which is assigned to the at least one cleaning roller unit and which is arranged on the floor head.

[0004] Floor cleaning devices are described, for example, in EP 3 750 464 Al, EP 3 884 834 Al, US 2021 / 018620 Al or KR 2012 06900U.

[0005] WO 2018 / 162092 A1 discloses a floor cleaning device with which an autonomous cleaning of a floor surface can be carried out.

[0006] Floor cleaning devices are also disclosed, for example, in EP 2 574 264 B1, US 8,855,941 B1, DE 102 42 257 B4, and US 10,149,589 B2. DE 20 2015 101 302 U1 discloses a cleaning device in the form of a vacuum cleaner.

[0007] Surface cleaning machines are known from WO 2016 / 058901 A1, WO 2016 / 058856 A1, WO 2017 / 063663 A1, WO 2016 / 058879 A1, and WO 2016 / 058956 A1. A surface cleaning machine is also known from WO 2016 / 058907 A1.

[0008] From US 4,875,246 a portable floor cleaning device is known which has a roller driven by an electric motor.

[0009] From DE 20 2009 013 434 Ul a device for wet cleaning floors with a brush which can be rotated about a rotation axis is known.

[0010] A cleaning machine is known from CN 201 197 698 Y.

[0011] US 6,026,529 discloses a device for cleaning floors or other hard surfaces.

[0012] A surface cleaning machine with rotating brushes is known from WO 2010 / 041185 A1.

[0013] A cleaning head for a floor cleaning machine is known from US 7,665,174 B2.

[0014] US Pat. No. 4,173,054 discloses a floor cleaner comprising a handle, a main body, a roller mechanism with a roller and a cleaning belt, a scraper, and a dirt fluid receptacle. 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.

[0015] 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.

[0016] Another floor cleaning machine is known from WO 2015 / 086083 Al.

[0017] A hard floor cleaning device is known from US 3,789,449.

[0018] From DE 103 57 637 A1 a self-propelled sweeper with a sweeping brush and an associated dirt collection chamber is known.

[0019] A household floor cleaning device with a wiping roller is known from DE 10 2007 054 500 Al.

[0020] From US 2006 / 0272120 A1 a floor cleaning device with a housing, a hose arrangement and a cleaning head is known.

[0021] From DE 10 2017 120 723 A1 a cleaning machine station for a cleaning machine is known, wherein the cleaning machine station has a receiving chamber for a cleaning head of the cleaning machine.

[0022] From WO 2005 / 087075 A1 a floor cleaning machine is known with a handle which is pivotably arranged on a base.

[0023] CN 107007215 A discloses a floor cleaning robot. DE 20 2018 104 772 U1 discloses a dirty water collection mechanism and dirty water detection mechanism, as well as a cleaning device.

[0024] Cleaning machines are also from AU 2017101723 A4, the

[0025] CN 206687671 U, DE 20 2016 105 300 Ul, US 9,622,637 Bl, CN 205359367 U, US 2017 / 0119225 Al, CN 205181250 U, CN 205181251 U, CN 205181256 U, DE 20 2016 105 299 U, WO 2017 / 059602 Al, WO 2017 / 059600 Al, WO 2017 / 059601 Al, WO 2017 / 059603 Al or DE 20 2016 105 301 Ul.

[0026] The unpublished DE 10 2022 102 924.7 discloses a floor cleaning device comprising a floor head and at least one cleaning roller, which rotates about a rotation axis during operation of the floor cleaning device. The at least one cleaning roller is held at least partially on the floor head by a holding device, the holding device being removable from the floor head together with the at least one cleaning roller. This document is incorporated by reference in its entirety. Further floor cleaning devices are disclosed in the unpublished DE 10 2022 102 937.9 and DE 10 2022 102 918.2, which are incorporated by reference in their entirety.

[0027] Further floor cleaning devices are disclosed in CN 207850637 U and WO 21248591 A1.

[0028] The invention is based on the object of providing a floor cleaning device of the type mentioned above, which achieves an optimized cleaning result and in particular an optimized coarse dirt absorption.

[0029] This object is achieved according to the invention in the floor cleaning device mentioned at the outset in that the sweeping device has at least one sweeping element which is spaced from the installation plane with a lower side in a height direction perpendicular to the installation plane, wherein a passage is formed between the at least one sweeping element and the installation plane, and that the at least one sweeping element is spatially arranged upstream of the at least one cleaning roller unit with respect to a main direction of travel of the floor cleaning device during a cleaning process on the floor to be cleaned.

[0030] Due to the distance between the at least one sweeping element and the installation plane, and thus to the floor to be cleaned, coarse dirt can pass through the passage (passageway) to the at least one rotating cleaning roller unit and be carried along by it. This largely prevents the floor head from "pushing" coarse dirt particles onto the floor to be cleaned.

[0031] An optimized cleaning result can also be achieved for a wet wiping process, since a direction of rotation parallel to the main direction of travel can be present, in particular at a contact area of ​​the at least one cleaning roller unit with the floor to be cleaned.

[0032] The simple design of the floor cleaning device results in an optimized cleaning result for both the wiping process and the coarse dirt collection.

[0033] In particular, it is provided that when the floor head moves in the main direction of travel, a specific area of ​​the floor to be cleaned is first passed over by the at least one sweeping element before this area comes into contact with the at least one cleaning roller unit. This means that coarse dirt particles lying on the floor to be cleaned can be passed over, so to speak, and then reach the cleaning roller unit and be picked up by it.

[0034] It is advantageous if the distance between the underside of the at least one sweeping element and the installation plane satisfies at least one of the following: the distance is at least 0.5 mm; the distance is at most 5.0 mm.

[0035] This ensures that dirt particles of a "normal" size can pass through the passage to the cleaning roller unit so that they can be picked up there.

[0036] Furthermore, it is advantageous if the floor head is assigned a first roller plane which is oriented perpendicular to the installation plane and on which the axis of rotation lies, wherein the first roller plane is a geometric dividing plane between a first space and a second space, with at least one of the following: with respect to the main direction of travel, the first space lies in front of the second space and the passage and / or the at least one sweeping element is positioned in the first space; the passage and / or the at least one sweeping element is positioned in the first space and at least one scraper element for detaching dirty fluid from the at least one cleaning roller unit is positioned in the second space; an outlet device for discharging dirty fluid from the at least one cleaning roller unit is positioned in the second space;The at least one sweeping element and at least one stripping element for removing dirt fluid from the at least one cleaning roller unit are spaced apart from one another in a direction perpendicular to the first roller plane; the rotational axis of the at least one cleaning roller unit lies between the at least one sweeping element and at least one stripping element in a direction perpendicular to the first roller plane.

[0037] The passage or the at least one sweeping element and an outlet device or the at least one scraper element are located on different sides relative to the first roller plane. This results in optimized removal of coarse dirt. On the one hand, a rotation direction parallel to the main direction of travel can be achieved at a contact area of ​​the at least one cleaning roller unit with a floor to be cleaned, and on the other hand, optimized removal of coarse dirt by the cleaning roller unit to the at least one scraper element can be achieved.

[0038] Furthermore, it is advantageous if the floor head has a second roller plane which is parallel to the installation plane and in which the axis of rotation lies, wherein the second roller plane forms a geometric dividing plane between a third space and a fourth space and the installation plane lies in the third space, with at least one of the following: the passage and / or the at least one sweeping element is arranged in the third space; at least one scraping element for detaching dirty fluid from the at least one cleaning roller unit is arranged in the fourth space; an outlet device for discharging dirty fluid from the at least one cleaning roller unit is arranged in the fourth space.

[0039] This results in optimized cleaning results both in wet mopping and for coarse dirt collection. Accordingly, it is advantageous if the passage and / or the at least one roller brush element are positioned in the first and third spaces.

[0040] It is particularly advantageous if, during cleaning operation of the floor cleaning device, the rotation direction of the at least one cleaning roller unit during rotation around the rotation axis on the floor to be cleaned (at a contact area with the floor to be cleaned) is parallel to the main direction of travel and / or, if the main direction of travel points to the left, the rotation direction of the at least one cleaning roller unit is clockwise. This results in an optimized mechanical impact on the floor to be cleaned by the cleaning roller unit for an optimized cleaning result.

[0041] In particular, the passage between the at least one sweeping element and the installation level is limited in a direction opposite to the main direction of travel by the at least one cleaning roller unit. This allows coarse dirt to be fed directly to the cleaning roller unit for collection from the main direction of travel.

[0042] In particular, the rotation axis is parallel to the installation plane and / or an underside of the at least one sweeping element is at least partially parallel to the installation plane. This results in a simple structural design with easy operation.

[0043] The object stated at the outset is further achieved according to the invention in that the sweeping device has at least one sweeping element which is spaced from the installation plane in a height direction perpendicular to the installation plane, and in that a plurality of guide elements for dirt particles are arranged on the at least one sweeping element, wherein adjacent guide elements are spaced from the at least one sweeping element in a transverse direction to the height direction. The guide elements ensure that dirt particles are diverted in order to be carried away by the at least one rotating cleaning roller unit. In this way, the pushing of dirt particles along the floor to be cleaned without being picked up and carried along by the at least one cleaning roller unit is largely avoided.

[0044] The guide elements provide impact surfaces (reflection surfaces) against which dirt particles can bounce off and movement components can be imparted, which lead to an improvement in the entrainment by the at least one cleaning roller unit.

[0045] In a sense, dirt particles can be thrown from the at least one cleaning roller unit against the guide elements and clamped between the cleaning roller unit and the guide elements, thereby transporting them along the cleaning roller unit. Alternatively or additionally, dirt particles can be selectively fed through the passage to the at least one cleaning roller unit to achieve improved conveyance.

[0046] It is advantageous if at least one of the following is provided: the guide elements are designed as teeth; the guide elements are designed in the shape of a plow; the guide elements protrude beyond a sweeping edge of the at least one sweeping element; the guide elements protrude in the direction of the at least one cleaning roller unit; the guide elements protrude towards the installation plane and in particular form a partial region of an underside of the at least one sweeping element; a distance in the height direction between an underside of a guide element and the installation plane is smaller than a distance in the height direction between a sweeping edge and the installation plane, wherein the sweeping edge lies between adjacent guide elements; a passage to the at least one cleaning roller is formed between an underside of the at least one sweeping element and the installation plane, wherein the passage has a meandering course in a viewing direction parallel to the installation plane.

[0047] By appropriately designing and arranging the guide elements, the cleaning roller unit can improve the capture of dirt particles, especially coarse dirt particles. This results in optimized cleaning results and, in particular, in the sweeping of dirt particles.

[0048] It is advantageous if the passage has a meandering, wave-like course. At the guide elements, the passage is lower than the height between adjacent guide elements. This results in optimized dirt collection.

[0049] It has proven advantageous if the distance between adjacent guide elements in the transverse direction is equal to or greater than the distance in the vertical direction between the underside of the at least one sweeping element and the installation plane. This results in an optimized collection effect for dirt particles, especially coarse dirt particles.

[0050] It is advantageous if at least one of the following is provided: the guide elements rest on a facing of the at least one cleaning roller unit, or protrude into the facing, or have a distance of less than 0.5 mm from the facing; a sweeping edge between adjacent guide elements and beyond which the guide elements protrude, rests on a facing of the at least one cleaning roller unit, or protrudes into the facing, or has a distance of at most 1 mm from the facing.

[0051] This results in optimized capture and removal of dirt particles, especially coarse dirt particles. This results in an optimized sweeping effect for the floor cleaning device.

[0052] It is particularly advantageous if the guide elements are each provided with at least one impact surface for dirt particles, and in particular with a plurality of impact surfaces. The impact surfaces effectively form reflection surfaces for dirt particles. This improves the capture and transport of dirt particles by the at least one cleaning roller unit as it rotates around its rotational axis.

[0053] In particular, at least one of the following is provided: at least one impact surface and in particular two impact surfaces are arranged on a side facing away from the at least one cleaning roller; at least one impact surface and in particular two impact surfaces are arranged on a side facing the at least one cleaning roller.

[0054] At least one baffle surface, and in particular two baffles on the side facing away from the at least one cleaning roller unit, improves the delivery of dirt particles to the at least one cleaning roller unit. At least one baffle surface on the side facing the at least one cleaning roller unit allows dirt particles to be trapped, so to speak, between a corresponding guide element and the cleaning roller unit to improve their conveyance.

[0055] Furthermore, it is advantageous if at least one of the following is provided: the at least one impact surface is oriented at an acute angle to the transverse direction; the at least one impact surface is arranged and designed such that dirt particles, when rebounding, experience a movement component in the direction of an area between adjacent guide elements; the at least one impact surface is arranged and designed such that dirt particles, when rebounding, experience a movement component in the transverse direction; the at least one impact surface is arranged and designed such that dirt particles, when rebounding, experience a movement component towards the at least one cleaning roller unit; the at least one impact surface is arranged and designed such that dirt particles, when rebounding, experience a movement component in the transverse direction and in a longitudinal direction transverse to the transverse direction and transverse to the height direction.

[0056] The appropriate arrangement and design of the impact surfaces results in optimized dirt particle capture and removal. In one embodiment, a first guide element has a first impact surface and an adjacent second guide element has a second impact surface, wherein the first impact surface and the second impact surface face each other and a distance between the first impact surface and the second impact surface decreases, and in particular decreases continuously, in a longitudinal direction toward the at least one cleaning roller unit. This allows for optimized delivery of dirt particles through the passage to the at least one cleaning roller unit.

[0057] In particular, a guide element is provided with the first impact surface and an impact surface corresponding to the second impact surface and, with the exception of any edge-side guide elements, all guide elements are preferably of the same design.

[0058] It is advantageous if at least one of the following is provided: the first impact surface and / or the second impact surface are designed as planes; the first impact surface and the second impact surface are located on a side of the at least one sweeping element facing away from the at least one cleaning roller unit; the first impact surface and the second impact surface are at an angle of the same magnitude to the transverse direction or are at an angle of different magnitude to the transverse direction; the first impact surface on the first guide element and an impact surface corresponding to the second impact surface on the first guide element intersect at an obtuse angle.

[0059] A structurally simple design results in optimized coarse dirt collection. Furthermore, it is advantageous if the first guide element has a third impact surface and the second guide element a fourth impact surface, wherein the third impact surface and the fourth impact surface face one another. In particular, the third impact surface and the fourth impact surface face the cleaning roller unit. This results in an optimized entrainment function for dirt particles on the at least one cleaning roller unit. A type of jamming of dirt particles on a corresponding guide element can be achieved. In particular, a guide element has a third impact surface and an impact surface corresponding to the fourth impact surface.

[0060] It is advantageous if at least one of the following is provided: the third impact surface and / or the fourth impact surface are designed as planes; the third impact surface borders on the first impact surface; the fourth impact surface borders on the second impact surface; the third impact surface and the fourth impact surface are located on a side of the at least one sweeping element facing the at least one cleaning roller unit; a distance between the third impact surface and the fourth impact surface in the transverse direction increases in a longitudinal direction towards the at least one cleaning roller unit; an angle of the third impact surface to the transverse direction is equal in magnitude to an angle of the fourth impact surface to the transverse direction;a distance between the first guide element and the second guide element is smallest in the transverse direction at a transition between the first impact surface and the third impact surface and a transition between the second impact surface and the fourth impact surface; the third impact surface is a continuation of the first impact surface and / or the fourth impact surface is a continuation of the second impact surface and in particular the first impact surface and the third impact surface are arranged at the same angle to the transverse direction and / or the second impact surface and the fourth impact surface are arranged at the same angle to the transverse direction.

[0061] In one embodiment, the third impact surface is a continuation of the first impact surface, and the fourth impact surface is a continuation of the second impact surface. This allows for the provision of relatively small guide elements with a narrow width in the transverse direction.

[0062] It is particularly advantageous if the guide elements facing the at least one cleaning roller unit have a roller surface oriented parallel to the rotational axis. With this roller surface, the guide element can rest against the at least one cleaning roller unit or even penetrate into it. This largely eliminates points and edges upon contact with the at least one cleaning roller unit, thus minimizing the risk of damage, particularly to the buildup of the at least one cleaning roller unit caused by a guide element.

[0063] It is advantageous if at least one of the following is provided: at least one impact surface, and in particular two impact surfaces, borders the roller surface; the roller surface touches a facing of the at least one cleaning roller unit, or protrudes into the facing, or is at a distance of no more than 0.5 mm from the facing. This results in optimized coarse dirt collection.

[0064] In one embodiment, guide elements, and in particular the at least one sweeping element as a whole, are spring-mounted on the floor head. This allows, for example, wear on the brushes of the at least one cleaning roller unit to be compensated for, resulting in an optimized cleaning result over the operating period.

[0065] In particular, the guide elements are arranged as a row of guide elements on the at least one sweeping element.

[0066] It is advantageous if at least one of the following is provided:

[0067] Guide elements at ends of the guide element row have a smaller width in the transverse direction than the remaining guide elements and in particular half the width of the remaining guide elements; an outer side of guide elements at ends of the guide element row is flat; the guide element row extends substantially over at least 30% of a length of the at least one cleaning roller unit parallel to the rotation axis and in particular over the entire length.

[0068] This results in an optimized supply of coarse dirt to the at least one cleaning roller unit, for example, over the entire length of the at least one cleaning roller unit. The correspondingly designed outer guide elements as "half-teeth" result in a simplified structure.

[0069] It is advantageous to provide a cleaning fluid tank and a humidification device with which the at least one cleaning roller unit and / or a floor to be cleaned can be moistened with cleaning fluid from the cleaning fluid tank. This allows a wet mopping process to be performed on the floor to be cleaned. In particular, this allows for optimized cleaning of hard surfaces. The cleaning fluid tank can be arranged on the floor head or, for example, on a support rod device.

[0070] Furthermore, it is advantageous to provide a dirt fluid tank, which can hold dirt fluid removed from the at least one cleaning roller unit via at least one scraper element. The dirt fluid tank can be arranged on the floor head and / or, for example, on a support rod device.

[0071] In one embodiment, the floor cleaning device is designed as a self-propelled and self-cleaning floor cleaning device, wherein, in particular, the floor body is or comprises a traveling body on which a travel drive for the floor cleaning device and a navigation device for the floor cleaning device are arranged. Accordingly, the floor cleaning device is a cleaning robot.

[0072] Alternatively, it is possible to provide a rod device which is hinged to the floor head, whereby the floor cleaning device can be guided by a standing operator over a floor to be cleaned.

[0073] In one embodiment, it is provided that the at least one sweeping element is mounted on the floor head in a replaceable manner, either in whole or in part (and in particular replaceable by an operator). This allows adaptation to a specific cleaning situation with regard to coarse dirt collection, particularly on a given floor cleaning device. In particular, a set of sweeping elements is then provided, wherein within a set the distance of the respective lower edges of the sweeping edge to the installation plane varies and / or a distance between guide elements varies. In principle, a sweeping element can be arranged on the floor head in an replaceable manner as a whole, or parts and in particular guide elements on the sweeping element can be replaceable.

[0074] According to the invention, a method of the type mentioned at the outset is provided, in which the sweeping device has at least one sweeping element which is spaced from the installation plane with a lower side in a height direction perpendicular to the installation plane, wherein a passage is formed between the sweeping element and the installation plane, and wherein dirt particles pass through the passage to the at least one cleaning roller unit and are carried along by the at least one cleaning roller unit.

[0075] The method according to the invention can be carried out with the floor cleaning device according to the invention or a floor cleaning device according to the invention can be operated with the method according to the invention.

[0076] Through the passage, dirt particles can reach the cleaning roller unit and be carried along. This largely prevents dirt particles from being pushed across the floor to be cleaned without being picked up.

[0077] Advantages of the method according to the invention have already been explained in connection with the floor cleaning device according to the invention. Further advantageous embodiments of the method according to the invention have also already been explained in connection with the floor cleaning device according to the invention.

[0078] Alternatively or additionally, it is particularly advantageous if the sweeping device comprises at least one sweeping element on which a plurality of spaced-apart guide elements are arranged, which guide dirt particles over the impact surface to the at least one cleaning roller unit. The advantages of the method have also already been explained in connection with the floor cleaning device according to the invention.

[0079] Furthermore, it is advantageous if at least one of the following is provided: in a cleaning operation of the floor cleaning device, a direction of rotation of the at least one cleaning roller unit on the floor to be cleaned is in the direction of the passage; in a cleaning operation of the floor cleaning device, a direction of rotation of the at least one cleaning roller unit on the floor to be cleaned is parallel to a main direction of travel; in a cleaning operation of the floor cleaning device, a direction of rotation of the at least one cleaning roller unit is towards guide elements on the at least one sweeping element.

[0080] This results in an optimized cleaning result both in terms of coarse dirt absorption and in terms of wiping, and in particular wet wiping, of the floor to be cleaned.

[0081] The following description of preferred embodiments, in conjunction with the drawings, serves to explain the invention in more detail.

[0082] They show:

[0083] Figure 1 is a perspective view of an embodiment of a

[0084] Ground device with a ground head;

[0085] Figure 2 is a bottom view of the floor cleaning device according to Figure 1 in the direction A according to Figure 1, wherein a cleaning roller unit is removed and wherein a tank combination with dirt fluid tank and cleaning liquid tank is removed;

[0086] Figure 3 shows an embodiment of a removed holding device or cassette with a cleaning roller unit fixed thereto, wherein the holding device or cassette according to Figure 3 is located on the floor cleaning device according to Figure 1;

[0087] Figure 4 shows the holding device or cassette according to Figure 3 with the cleaning roller unit removed, whereby a sweeping device is visible;

[0088] Figure 5 is a partial sectional side view of the floor head according to Figure 1 in the area of ​​the holding device or cassette and cleaning roller unit as well as sweeping device;

[0089] Figure 6 is a bottom view of the holding device or cassette according to

[0090] Figure 4 in direction B according to Figure 4;

[0091] Figure 7 shows a rear view of the holding device or cassette according to

[0092] Figure 4 in the direction C according to Figure 4;

[0093] Figure 8 shows a further embodiment of a holding device or

[0094] Cassette with a sweeping device (and removed cleaning roller unit);

[0095] Figure 9 schematically shows a schematic side sectional view of the

[0096] Holding device or cassette according to Figure 8 with cleaning roller unit (not to scale); Figure 10 shows a partial view of the holding device or cassette according to Figure 8 in the area of ​​a sweeping device according to direction D according to Figure 8;

[0097] Figure 11 is a partial view of the holding device or cassette according to Figure 8 in the area of ​​the sweeping device in the direction E according to Figure 8;

[0098] Figure 12 shows a further embodiment of a holding device or cassette without a cleaning roller unit;

[0099] Figure 13 is a schematic sectional view, not to scale, of the holding device or cassette according to Figure 12 with the cleaning roller unit inserted;

[0100] Figure 14 is a schematic bottom view of the cassette or cleaning roller unit in the area of ​​a sweeping device in the direction F according to Figure 12;

[0101] Figure 15 is a partial view of the holding device or cassette according to Figure 12 in the area of ​​the sweeping device in the direction G according to Figure 12; and

[0102] Figure 16 is a schematic view of a further embodiment of a floor cleaning device according to the invention, which is designed to be operated by an operator standing on the floor to be cleaned.

[0103] One embodiment of a floor cleaning device according to the invention is a self-propelled and self-steering floor cleaning device (Figures 1, 2). This floor cleaning device 10 comprises a floor head 12, which includes a self-propelled and self-steering carriage 14. During cleaning operation, the floor cleaning device 10 is placed with its carriage 14 on a floor 16 to be cleaned (Figure 5).

[0104] A drive system (not shown in the drawings) is arranged on the traveling body 14. This system drives wheels 18. In one embodiment, a first wheel 18a and a second wheel 18b are provided.

[0105] The wheels 18 are driven by the drive to rotate around a wheel axle 19.

[0106] Furthermore, a support roller 20 is arranged on the traveling body 14, which has a rotation axis 21. The support roller 20 is pivotable about a (steering) axis 22, which is perpendicular to the rotation axis 21.

[0107] In one embodiment, the support roller 20 is a passive steering roller which is not driven (and in particular is not driven in a rotation about the rotation axis 21 and in a pivoting movement about the axis 22).

[0108] A change in direction of the floor cleaning device 10 on the floor head 12 is effected by corresponding control of the wheels 18a and 18b by a control device which is arranged on the traveling body 14, wherein in particular for a change in direction these can be rotated at different speeds.

[0109] In principle, it can also be provided that the support roller 20 is an active steering roller for directional control of the ground device 10.

[0110] The floor cleaning device 10 has a main direction of travel 24. This main direction of travel 24 is the direction of travel of the floor cleaning device 10 when the support roller 20 is aligned so that its rotational axis 21 is parallel to the wheel axis 19. It is a forward direction of travel for the floor cleaning device 10. The floor head 12 has a support plane 26 above the traveling body 14 (see Figure 18). The support plane 26 is defined by the wheels 18 and the support roller 20. A cleaning roller unit 28 is located on the support plane 26.

[0111] A navigation device 30 is arranged on the traveling body 14. The navigation device 30 is a sensor device and comprises at least one sensor element. The navigation device is signal-effectively connected to the control device for controlling the traveling operation of the floor cleaning device 10. The navigation device comprises, for example, one or more optical sensors, one or more radar sensors, one or more IR sensors, and / or one or more ultrasonic sensors.

[0112] The traveling body 14 has a front end 32 and a rear end 34 relative to the main direction of travel 24. In the region of the rear end 34, a tank combination 36 comprising a dirt fluid tank 38 and a cleaning fluid tank 40 is removably arranged on the traveling body 14.

[0113] Dirt fluid is defined as a fluid that is essentially flowable. It can be composed of dirt particles or a mixture of dirt particles and a liquid (especially water, possibly with a surfactant cleaning agent added).

[0114] The traveling body 14 has a bottom side 42 and an upper side 44 opposite the bottom side. The wheels 18 and the support roller 20 are arranged on the bottom side 42. The navigation device 30 is arranged, at least in part, on the upper side 44.

[0115] Between the underside 42 and the upper side 44, the traveling body 14 has a wall 46.

[0116] A bumper 48 is arranged on the wall 46 in the area of ​​the front end 32, which can be used to tactilely detect collisions of the floor cleaning device 10 with obstacles. The bumper 48 is or includes one or more tactile sensor elements that are connected to the control device for signal transmission.

[0117] A center 50 is assigned to the bottom head 12 (Figure 1). The center 50 is a geometric center of gravity of the bottom head 12 (with tanks 38, 40). This center 50 can be assigned a height direction (axial direction) 52 perpendicular to the installation plane 26 and, accordingly, a circumferential direction. The impact body 48 extends along the wall 46 in the circumferential direction, in particular over an angular range of at least 120° and preferably of at least 150°.

[0118] Cliff sensors 54 are arranged on the underside of the chassis 42, which are connected to the control unit for signaling purposes. These cliff sensors 54 serve to prevent the floor cleaning device 10 from falling, for example, when reaching a staircase, by detecting "cliffs" accordingly.

[0119] The floor cleaning device 10 has a particularly rechargeable battery device, which is arranged on the traveling body 14. For example, a corresponding battery compartment 56 (see Figure 2) is provided, which is accessible from the underside 42 and is closed by a cover 58.

[0120] Further elements such as a sensor 60 for carpet detection, a WiFi module, etc. can be arranged on the chassis.

[0121] Charging contacts 62 are also arranged on the chassis to enable the battery device to be charged at a charging station.

[0122] In the illustrated embodiment, charging contacts 62 are arranged on the underside 42. The base head 12 has an outer contour 64 in the shape of a circle in a top view in the vertical direction 52 of the top side 44. A distance in the radial direction perpendicular to the vertical direction 52 from the center 50 to an upper edge of the wall 46 is at least approximately equal (corresponding to the radius of the circle).

[0123] It is also fundamentally possible for the outer contour 64 to have an approximately circular shape, in which case a distance to the outer contour from the center 50 deviates by a maximum of 15% from a corresponding mean value.

[0124] The traveling body 14 (the bottom head 12 without the tank combination 36) has as its outer contour the shape of a circular segment with a first chord 66. The first chord 66 is oriented transversely and in particular perpendicularly to the main direction of travel 24.

[0125] In one embodiment, it is oriented at least approximately parallel to the wheel axis 19.

[0126] Relative to the front end 32, the first tendon 66 lies beyond the center 50. It lies at the rear end 34. Between the first tendon 66 and the front end 32 lies the center 50.

[0127] In the plan view of the upper side 44 in the height direction 52, the tank combination 36 also has as its outer contour the shape of a second circular segment with a second chord 68.

[0128] The first circular section of the outer contour 64 of the traveling body 14 and the second circular section of the outer contour of the tank combination 36 complement each other to form the circular outer contour of the bottom head 12.

[0129] When the tank combination 36 is mounted on the chassis 14, the second chord 68 is parallel to the first chord 66 and directly adjacent to it. A receiving shaft 70 for the cleaning roller unit 28 is arranged or formed on the chassis 14. The receiving shaft 70 is mounted on the chassis 14 in the region of the rear end 34. The receiving shaft 70 has a longitudinal extension direction 72 that is transverse and in particular perpendicular to the main direction of travel 24. The longitudinal extension direction 72 is furthermore at least approximately parallel to the wheel axis 19.

[0130] In one embodiment, the longitudinal direction 72 is parallel to the first chord 66.

[0131] The receiving shaft is open to the underside 42 of the traveling body 14, which is a floor side (facing the installation plane 26), so that a cleaning roller unit 28 held in the receiving shaft 70 can act on the floor 16 to be cleaned.

[0132] Towards the upper side 44 and thus facing away from the lower side 42, the receiving shaft 70 is closed by a cover wall 74.

[0133] Between the cover wall 74 and the underside 42, the traveling body has a wall 76, which delimits the receiving shaft 70 towards an interior of the traveling body 14. The travel drive, the control device, etc., are arranged in the interior of the traveling body 14.

[0134] The traveling body 14 has a first lateral side 82 and an opposite lateral side 84. The lateral sides 82, 84 are relative to the main direction of travel 24.

[0135] In the plan view in the height direction 52 from above onto the base body 12, the front end 32 is followed in a clockwise direction by the second lateral side 84, then the rear end 34 on the traveling body 14 and then the first lateral side 82. On the first lateral side 82, a side wall 86 is located on the traveling body 14. This side wall 86 delimits the receiving shaft 70 towards the first lateral side 82. The side wall 86 has an extension transverse to the first chord 66.

[0136] The side wall 86 follows the circular outer contour 64.

[0137] The receiving shaft 70 has an opening 88 opposite the side wall 86 on the second lateral side 84.

[0138] A drive motor 90 for the cleaning roller unit 28 is located on the side wall 86.

[0139] The drive motor 90 is supplied with electrical energy by the battery device in the battery compartment 56.

[0140] In principle, it is also possible for the drive motor 90 to be located, for example, behind the wall 76. A torque transmission device is then arranged on the side wall 86.

[0141] The drive motor 90 is assigned a drive shaft 92 which is rotatable about a rotation axis 94.

[0142] The drive shaft 92 extends into the receiving shaft 70. During operation of the floor cleaning device 10, it is connected in a rotationally fixed manner to the cleaning roller unit 28. The drive shaft 92 drives a rotational movement of the cleaning roller unit 28 about a rotational axis that coincides with the rotational axis 94.

[0143] In the illustrated embodiment, the drive shaft 92 is directly connected to the drive motor 90, i.e., it is an output shaft of the drive motor 90 or coaxially connected to such an output shaft. The drive shaft 92 is rotatably mounted. In the illustrated embodiment, it is mounted directly on the drive motor 90. It forms a first pivot bearing 96 for the rotating support of the cleaning roller 28 during rotation about the rotation axis 94.

[0144] The rotation axis 94 is transverse and in particular perpendicular to the main direction of travel 24.

[0145] The rotation axis 94 is parallel to the installation plane 26.

[0146] The rotation axis 94 is transverse and in particular perpendicular to the height direction 52 (which is a normal axis to the installation plane 26).

[0147] Furthermore, in particular, the rotation axis 94 is parallel to the wheel axis 90. Furthermore, it is in particular parallel to the first chord 66.

[0148] The longitudinal extension direction 72 of the receiving shaft 70 is parallel to the rotation axis 94.

[0149] The floor cleaning device 10 includes a cassette 98 (e.g., Figures 2 to 4). The cassette 98 serves to hold the cleaning roller unit 28 in the receiving shaft 70 during operation of the floor cleaning device 10, and to hold the cleaning roller unit 28 when inserted into the carriage 14 and when removed from the carriage 14.

[0150] A cassette is understood to be an inherently rigid or stable structure, which serves as a receptacle for the cleaning roller unit 28 (but does not have to be closed) and can be handled as an independent unit. The cassette 98 comprises a cover 100. The cover 100 serves to close the opening 88 of the receiving shaft 70 when the cassette 98 is inserted. When the cassette 98 is inserted on the carriage 14, the cover 100 is located opposite the side wall 86.

[0151] The cover 100 is adapted in its geometric shape to the outer contour 64 of the traveling body 14 and in particular is curved accordingly in order to follow the circular contour.

[0152] A locking device is provided to fix the cover 100 to the moving body 14 and thus to lock the cassette 98 to the moving body 14. This locking device comprises, for example, an unlocking button arranged on the moving body 14 and acting on a locking pawl. In one embodiment, a counter-element for the locking pawl is arranged on the cover 100, wherein the counter-element has an opening into which the locking pawl can be inserted. By actuating the unlocking button, the locking pawl, which is in particular spring-supported, can be displaced from the counter-element, and the corresponding locking of the cover 100 to the moving body 14 is released.

[0153] A second pivot bearing 108 is located on the cover for the rotation of the cleaning roller unit 28 about the rotation axis 94 (see, for example, Figure 4).

[0154] In one embodiment, the second pivot bearing 108 is designed as a ball bearing.

[0155] The cleaning roller unit 28 can be fixed in a rotationally fixed manner to the second pivot bearing 108.

[0156] When the cassette 98 is properly secured to the carriage 14, the cleaning roller unit 28 is rotatably mounted opposite one another on the first pivot bearing 96 and the second pivot bearing 108. The cleaning roller unit 28 is supported accordingly at its opposite end faces. The cleaning roller unit 28 is held on both sides between the first pivot bearing 96 and the second pivot bearing 108. The cleaning roller unit 28 is held in the receiving shaft 70 in a suspended manner, so to speak, between the first pivot bearing 96 and the second pivot bearing 108 and is supported at its respective end faces. This allows cleaning roller units 28 with a greater length (in a longitudinal direction parallel to the rotation axis 94) to be used, and larger torsional moments can also be absorbed. Wobbling of the cleaning roller 28 is prevented.

[0157] The cassette 98 comprises a support structure 110, which sits on the cover 100 and ensures the corresponding stability or rigidity of the cassette 98.

[0158] The second pivot bearing 108 is positioned on the cover 100 at a distance from this support structure 110.

[0159] In one embodiment, the support structure 110 is or includes a wall 112 which is fixed to the lid 100.

[0160] The wall 112 has a cylindrical shell shape. It extends in a longitudinal direction. When the cassette 98 is held on the carriage 14 with the cleaning roller 28 held thereon, this longitudinal direction of the cassette 98 is parallel to the rotation axis 94. It is also parallel to the longitudinal direction 72 of the receiving shaft 70.

[0161] The wall 112 is designed such that, when the cassette 98 is held on the carriage 14, it covers the wall 76 of the carriage and at least partially the cover wall 74 on the carriage 14. The wall 112 forms a cover and thus a protective wall from the cleaning roller 28 to the carriage 14. This largely prevents contamination of the carriage 14 during operation of the floor cleaning device 10; the wall 112 keeps dirt away from the corresponding walls 74, 76 of the carriage 14.

[0162] For the defined holding and positioning of the cassette 98 in the receiving shaft 70, a guide device is arranged on the receiving shaft 70. The cassette 94 has a matching counter-guide device.

[0163] In this context and for further details regarding the removal and insertion of the cassette 94, please refer to the unpublished

[0164] DE 10 2022 102 937.9, to which reference is made in full.

[0165] The cassette 98 can be inserted or removed from the receiving shaft 70 in an insertion / removal direction 124 (direction and opposite direction).

[0166] This insertion / removal direction 124 is, when appropriately aligned, parallel to the longitudinal direction of the cassette 98 and the longitudinal direction 72 of the receiving shaft 70. In particular, this insertion / removal direction 124 is parallel to the rotation axis 94.

[0167] The insertion / removal direction 124 is transverse and in particular perpendicular to the main travel direction 24.

[0168] A holding device 126 for the cleaning roller unit 28 is arranged on the cassette 98. The holding device 126 is designed such that it pre-positions the cleaning roller unit 28 upon insertion of the cassette 98 onto the carriage 14 and then ensures automatic coupling of the drive shaft 92 to the cleaning roller unit 28 when the cassette 98 is inserted in the corresponding insertion direction 124 and the cover 100 is locked to the carriage 14. It also ensures that the cleaning roller unit 28 is automatically removed upon removal of the cassette, i.e., the operator intervention is the removal of the cassette 98 and, in particular, the operator does not have to touch the cleaning roller unit 28.

[0169] Furthermore, the holding device 126 ensures that the cleaning roller unit 28 is positioned accordingly on the cassette 98 during cleaning operation and in particular is held on the first pivot bearing 96 (the drive shaft 92) and the second pivot bearing 108.

[0170] The holding device 126 has a first holding element 128 and a second holding element 130. The first holding element 128 is formed by the second pivot bearing 108.

[0171] The second holding element 130 is arranged on the wall 112 at a distance from the first holding element 128 in the longitudinal direction.

[0172] The second holding element 130 comprises, for example, a ring element 132 with an opening 134. An axis of the opening 134 is aligned parallel to the longitudinal direction of the cassette 98.

[0173] The cleaning roller 28 comprises a carrier 136 on which a cleaning medium 138 is arranged (see, for example, Figure 3). The carrier 136 is an annular cylinder with openings at least at its front ends. It is also possible to have a continuous opening.

[0174] The cleaning medium 138 is a covering that is fixed to the carrier 136. When designed as a wet-wiping device, the cleaning medium 138 is, in particular, a textile covering, such as a microfiber covering, that is attached to the carrier 136. It is also possible for the cleaning medium 138 to be formed by bristles, particularly when the floor cleaning device 10 is designed as a sweeping device.

[0175] For example, it is also possible that the cleaning medium 138 comprises both bristles and textile trim areas.

[0176] The drive shaft 92 projects into the receiving shaft 70.

[0177] A distribution device 168 for cleaning fluid from the cleaning fluid tank 40 is arranged on the cassette 98 and on the wall 112. The distribution device 168 comprises one or more distribution channels with a channel wall. The channel wall protrudes beyond the wall 112 on an outer side of the wall 112, with the outer side of the wall 112 facing away from the cleaning roller unit 28.

[0178] The distribution channel includes openings in the wall that extend from the rear side of the wall 112 (facing away from the cleaning roller unit 28) to a front side of the wall 112 (facing the cleaning roller unit 28). Cleaning fluid can be applied to the cleaning roller unit 28 through these openings.

[0179] The openings are arranged above the cleaning roller unit 28 with respect to the height direction 152, so that the cleaning medium 138 (the lining of the cleaning roller unit 28) can be moistened accordingly with cleaning fluid.

[0180] In particular, the cleaning roller unit 28 can be supplied with cleaning fluid from the cleaning fluid tank 40 by gravity via the distribution device 168 and the openings.

[0181] A connection 176 is arranged on the cassette 98, which is in fluid communication with the distribution device 168. The connection 176 is a connection of the cassette 98 for a fluid connection with the cleaning fluid tank 40.

[0182] The connection 176 is designed in cooperation with the traveling body 14 and the dirty fluid tank 38 so that a fluid-effective connection between the cleaning fluid tank and the distribution device 168 is automatically established when the cassette 98 is properly fixed to the traveling body 14 (with locking on the cover 100).

[0183] In particular, a valve device is assigned to the cleaning liquid tank 40 (which is preferably positioned outside the cassette 98), which releases a discharge of cleaning liquid from the cleaning liquid tank 40 only during the cleaning operation of the floor cleaning device 10.

[0184] The cassette 98 does not contain any electronic components or the like or any components that require a power supply.

[0185] A stripping element 178 is held on the cassette 98. The stripping element 178 is, in particular, removable from the cassette 98.

[0186] In the exemplary embodiment of the floor cleaning device, exactly one cleaning roller unit 28 with a cleaning roller is provided. In particular, exactly one stripping element 178 is assigned to this one cleaning roller unit 28.

[0187] The stripping element 178 serves to strip (remove) dirty fluid from the cleaning roller unit 28 (from the lining of the cleaning roller unit 28) and to guide dirty fluid via a corresponding guide device to the dirty fluid tank 38.

[0188] One embodiment of a stripping element 178 is formed in one piece. It comprises a body. A channel device is integrated into the body.

[0189] In one embodiment, the channel assembly comprises a channel having an inlet opening and an outlet opening. With the stripping element 178 properly positioned on the cassette 98 and the cassette 98 held on the carriage 14, the inlet opening faces the cleaning roller unit 28, and the outlet opening faces an inlet opening of the dirty fluid tank 38.

[0190] In this context, reference is made to DE 10 2022 102 937.9, to which express reference is made.

[0191] The stripping element 178 is movably mounted on the cassette 98. In one embodiment, the stripping element 178 is mounted on the cassette 98 about a pivot axis 192 (see Figure 4).

[0192] The pivot axis 192 is parallel to the longitudinal direction of the cassette 98 or parallel to the rotation axis 94.

[0193] When the cassette 98 is held on the traveling body 14, the pivot axis 192 is transverse and in particular perpendicular to the main direction of travel 24.

[0194] Regarding the arrangement and design of the tank combination 36 and the supply of dirty fluid to the dirty fluid tank 38, reference is made to the above-mentioned unpublished

[0195] DE 10 2022 102 937.9, to which reference is also made in full in this context.

[0196] Using the cleaning roller unit 28 and cleaning agent from the cleaning fluid tank 40, a wet mopping process can be performed on the floor 16 to be cleaned. The cleaning roller unit 28's rotation about the rotation axis 94 exerts a mechanical action on the floor 16 at the contact surface of the cleaning medium (filling) 138. Dirt can be removed and carried away by the cleaning roller unit 28. Dirt fluid is removed from the cleaning roller unit 28 at the scraping element 178 and from there fed to the dirt fluid tank 38.

[0197] Furthermore, a sweeping device 202 is arranged on the floor head 12, which serves to collect coarse dirt (coarse dirt particles) 204 (see, for example, Figure 6).

[0198] The sweeping device 202 comprises (at least) one sweeping element 206, which is designed as a sweeping strip. The sweeping element 206 is arranged on the wall 112 or is formed on the wall 112.

[0199] In one embodiment (see Figure 4), a uniform sweeping element 206 is provided, which is, for example, formed in one piece. This sweeping element 206 extends in the longitudinal direction of the cassette 98 essentially over at least 80% of the length of the cleaning roller unit 28 and in particular over its entire length.

[0200] The sweeping element 206 has a sweeping edge 208 (see, for example, Figure 4), which in one embodiment has a straight line. In one embodiment, the sweeping edge 208 is at least approximately parallel to the longitudinal direction of the cassette 98. The sweeping edge 208 is parallel to the installation plane 26.

[0201] In one embodiment, the sweeping edge 208 is also at least approximately parallel to the rotation axis 94.

[0202] An underside 210 of the sweeping element 206 faces the installation plane 26 and thus, during a cleaning operation, faces the floor 16 to be cleaned. Part of the underside 210 is formed by the sweeping edge 208. This will be explained in more detail below.

[0203] The sweeping edge 208 is spaced apart from the installation plane 26 by its underside 210. Between the underside 210 and the installation plane 26 lies a passage 212 leading to the cleaning roller unit 28 (see Figure 5). Dirt particles 204 can pass through this passage 212 to the cleaning roller unit 28 and be carried along by it to the scraper element 178.

[0204] A (minimal) distance 214 (Figure 5) between the underside 210 of the sweeping element 206 and the installation plane 26, and thus a minimum height of the passage 212 in the height direction 52, is greater than or equal to 0.5 mm and less than or equal to 5.0 mm. In a specific embodiment, this distance 214 is approximately 1 mm. The distance 214 is specifically adapted to the intended use.

[0205] A first roller plane 216 can be assigned to the base head 12. The first roller plane 216 is perpendicular to the installation plane 26 and contains the rotation axis 94 (see Figure 5). The first roller plane 216 is a geometric dividing plane between a first space 218 and a second space 220.

[0206] The tank combination 36 and the scraper element 178 are arranged in the second space 220.

[0207] The passage 212 and the sweeping element 206, as well as the wall 112, are arranged in the first space 218. Due to the definition of the first roller plane 216, the cassette 98 and the cleaning roller unit 28 are each arranged with a partial area in both the first space 218 and the second space 220.

[0208] A second roller plane 222 can also be assigned, which is parallel to the installation plane 26 and contains the rotation axis 94 (see Figure 5). The second roller plane 222 is a geometric dividing plane between a third space 224 and a fourth space 226. The installation plane 26 is located at the third space 224. The second roller plane 222 is a dividing plane relative to the height direction 52.

[0209] When considering a coordinate system with the origin at the rotation axis 94, the intersection between the second space 220 and the fourth space 226 corresponds to the first quadrant. The intersection between the first space 218 and the fourth space 226 is the second quadrant. The intersection between the first space 218 and the third space 224 is the third quadrant. The intersection between the second space 220 and the third space 224 is the fourth quadrant.

[0210] The scraping element 178 is located in the fourth space 226. The passage 212 is located in the third space 224. In one embodiment, the sweeping element 206 is also located in the third space 224.

[0211] Relative to the height direction 52, the scraping element 178 is located above the passage 212 and above the underside 210 and in particular above the sweeping element 206 as a whole.

[0212] A direction from the second space 220 to the first space 218 is parallel to the main direction of travel 24. Relative to the main direction of travel 24, the scraping element 178 is located behind the sweeping element 206.

[0213] Also with respect to the main direction of travel 24, the cleaning roller unit 28 is located behind the passage 212 and the cleaning roller unit 28 forms a boundary of the passage 212 in the opposite direction to the direction of travel 24.

[0214] During operation of the floor cleaning device 10, the cleaning roller unit 28 has a rotation direction 228 (Figure 5), which is parallel to the main direction of travel 24 at a contact area 230 with the floor 16 to be cleaned. Starting from the contact area 230, when the rotating roller unit rotates about the rotation axis 94 in the rotation direction 228, it rotates from the contact area 230 to the sweeping element 206 and then from there to the scraping element 178.

[0215] With this direction of rotation 228 parallel to the main direction of travel 24 at the contact area 230, an effective cleaning effect is achieved.

[0216] When the floor cleaning device 10 moves in the main direction of travel 24, a specific area 232 (see Figure 5) on the floor 16 is first passed over by the sweeping element 206 before it comes into contact with the cleaning roller unit 28.

[0217] The passage 212 and the stripping element 178 are arranged on different sides of the second roller plane 216.

[0218] A plurality of spaced guide elements 234 are located on the sweeping element 206. Adjacent guide elements 234 are spaced 236 apart in a transverse direction 238. The transverse direction 238 is parallel to the longitudinal direction of the cassette 98. When the rotary roller unit 28 is held, the transverse direction 238 is parallel to the rotation axis 94.

[0219] The transverse direction 238 is in particular parallel to the installation plane 26. The transverse direction 238 is perpendicular to the main direction of travel 24.

[0220] The distance 236 is greater than the distance 214. In particular, the distance 236 is at least 1.5 times greater than the distance 214.

[0221] In a specific embodiment, the distance 236 between adjacent guide elements 234 is approximately 30 mm.

[0222] The guide elements 234 are tooth-shaped. They form impact elements for coarse dirt particles 204, guiding them to the cleaning roller unit 28, and are accordingly provided with impact surfaces. This will be described in more detail below.

[0223] The guide elements 234 project beyond the sweeping edge 208 in the direction of the cleaning roller unit 28 and beyond the sweeping edge 208 in the direction of the installation plane 26.

[0224] In principle, it is also possible for the guide elements 234 to protrude beyond the sweeping edge 208 in a direction opposite to the cleaning roller unit 28.

[0225] The passage 212 has its minimum height as the minimum distance 214 between the sweeping element 206 and the installation plane 26 at the guide elements 234 when these project beyond the sweeping edge 208 towards the installation plane 26.

[0226] The passage 212 therefore has a meandering course, seen in a direction parallel to the direction of travel 24 or parallel to the installation plane 26 (cf. Figure 11 for another embodiment of a sweeping device).

[0227] Due to the protrusion of the guide elements 234 beyond the sweeping edge 208, the underside 210 of the sweeping element 206 does not have a straight line but rather a kind of wave-like "jagged" line (meandering line).

[0228] The guide elements 234 have a first side 240 which faces away from the cleaning roller unit 28 and a second side 242 which faces the cleaning roller unit 28.

[0229] With the second side 242, the guide elements 234 rest against the cleaning roller unit 28 (rest against the cleaning medium 138), or protrude into the cleaning medium 138 or have at least a small distance of at most 0.5 mm from this cleaning medium 138.

[0230] In one embodiment of a sweeping device 202 (Figures 4 to 7), the guide elements 234—at least if they are not located at the edge—are plow-shaped on the first side 240. This plow-shaped design is achieved by corresponding impact surfaces for coarse dirt particles 204.

[0231] In one embodiment, a non-edge guide element 234 has a first impact surface 244 and a second impact surface 246 on the first side 240 (see Figure 6). The first impact surface 244 faces a second impact surface 246 of an adjacent guide element 234. The second impact surface 246 faces a first impact surface 244 of an adjacent guide element 234.

[0232] In one embodiment, the first impact surface 244 and the second impact surface 246 are substantially planar.

[0233] The first impact surface 244 is at an acute angle to the longitudinal axis of the cassette 98. Accordingly, when the cleaning roller unit 28 is held, it is at an acute angle to the rotation axis 94 of the cleaning roller unit 28.

[0234] In Figure 6, this acute angle is indicated by the reference numeral 248.

[0235] In one embodiment, the first impact surface 244 and the second impact surface 246 are oriented at the same acute angle 248 to the rotation axis 94.

[0236] In one embodiment, the acute angle 248 is in the range between 30° and 60°, for example, approximately 45°. The first impact surface 244 and the second impact surface 246 intersect (where a rounding may be present at an interface) and, in particular, intersect at an obtuse angle.

[0237] In a specific example, this obtuse angle is approximately 135°.

[0238] An imaginary tip of the guide element 234, which lies on an axis between the second side 242 and the first side 240, points in the main direction of travel 24.

[0239] A distance on first sides 240 of adjacent guide elements 234 decreases in a longitudinal direction perpendicular to the height direction 52 and perpendicular to the transverse direction 238 towards the cleaning roller unit 28 due to the acute-angled arrangement of the impact surfaces 244 and 246.

[0240] A guide element 234 has a third impact surface 250 and a fourth impact surface 252 on the second side 242. The third impact surface 250 adjoins the first impact surface 244. The fourth impact surface 252 adjoins the second impact surface 246.

[0241] In particular, the third impact surface 250 and the first impact surface 244 are at an acute angle to each other. Similarly, the second impact surface 246 and the fourth impact surface 252 are at an acute angle to each other.

[0242] The third impact surface 250 and the fourth impact surface 252 are each at an acute angle to the longitudinal axis of the cassette 98 and to the rotation axis 94 of the cleaning roller unit 28, respectively. This acute angle is indicated in Figure 6 by the reference numeral 254.

[0243] The acute angle 254 is greater in magnitude than the acute angle 248. A roller surface 256 is located between the third impact surface 250 and the fourth impact surface 252 on the second side 242 of the guide element 234. In one embodiment, this roller surface 256 is oriented at least approximately parallel to the longitudinal axis of the cassette 98 or parallel to the rotation axis 94. The roller surface 256 of the guide element 234 faces the cleaning roller unit 28 and rests against the cleaning medium 138 (the facing) or protrudes into it or is at most a small distance from it of approximately 0.5 mm or less.

[0244] The parallel oriented roller surface 256 minimizes the risk of damage to the cleaning medium 138 due to contact with the guide element 234.

[0245] A distance between the third impact surface 250 and the fourth impact surface 252 of adjacent guide elements 234 increases in the longitudinal direction perpendicular to the transverse direction 238 and perpendicular to the height direction 252 towards the cleaning roller unit 28.

[0246] A partial region 258 of the passage 212 between adjacent guide elements 234 initially narrows towards the cleaning roller unit 28 due to the impact surfaces 244, 246, and then widens on the second side 242 towards the cleaning roller unit 28 due to the impact surfaces 250 and 252.

[0247] The first impact surface 244 and the second impact surface 246 have the task, as indicated in Figure 6, of deflecting coarse dirt particles which strike a corresponding guide element 234 in the transverse direction 238, i.e. of allowing them to bounce off with a movement component in the transverse direction 238 (i.e. of reflecting them, so to speak). As a result, coarse dirt particles 204 reach the area between adjacent guide elements 234 (i.e. into the partial area 258) and can then, when moving in the main direction of travel 24, pass through the floor head 12 to the cleaning roller unit 28 and be carried along there. Coarse dirt particles which are not properly carried along by the cleaning roller unit 28 or, for example, bounce off it, can be reflected again by the impact surfaces 250, 252 on the second side 242 in such a way that they reach the cleaning roller unit 28 and are carried along by it.

[0248] The corresponding design of the guide elements 234 improves the coarse dirt collection, whereby the passage 212 can generally be driven over.

[0249] In the sweeping device 202, the guide elements 234 are arranged as a guide element row 260. In particular, the guide elements 234 are aligned.

[0250] The guide element row 260 has end guide elements 262 which are located at respective ends of the guide element row 260.

[0251] In one embodiment, these end guide elements 262 are designed as "half teeth" and have a particularly flat outer side 264.

[0252] Such an end guide element 262 then has only a first impact surface 244 and a second impact surface 246 or only a third impact surface 250 and a fourth impact surface 252.

[0253] In one embodiment, the sweeping element 206 is formed integrally with its guide elements 234. In principle, the sweeping element 206 can be made of a soft component material or a hard component material. The sweeping element 206 can be arranged on the cassette 98 in a fixed or removably manner.

[0254] It is possible for the guide elements 234 to be permanently connected to the sweeping element 206 or to be individually removable. A removable (replaceable) sweeping element 206 allows for adaptation to specific cleaning conditions, particularly to the amount of coarse dirt. This also applies if the sweeping element is not replaceable as a whole but only in sections (via guide elements 234). In particular, a set of sweeping elements or guide elements is then provided, each having different geometric dimensions, in order to enable adaptation to the actual amount of coarse dirt.

[0255] In principle, the guide elements 234 can be made of the same material as the rest of the sweeping element 206 or of a different material.

[0256] In one embodiment, the sweeping element 206 is supported on the cassette 98 via a spring device and is accordingly spring-mounted.

[0257] It is also possible in principle for the sweeping element 206 to comprise spacers which are located on the installation plane 26 and thus act as spacers to the floor 16 to be cleaned (not shown in the drawings).

[0258] The floor cleaning device 10 works as follows:

[0259] During a cleaning operation, the drive motor 90 drives the rotation of the cleaning roller unit 28 in the rotation direction 228. The cleaning roller unit 28 (the cleaning medium 138) is moistened with cleaning fluid.

[0260] At the contact area 230, the cleaning roller unit 28 acts mechanically on the floor 16 to be cleaned. The cleaning fluid removes the dirt.

[0261] Dirt fluid is removed from the cleaning roller unit 28 via the scraper element 178 and fed to the dirt fluid tank 38. If coarse dirt particles 204 are present on the floor to be cleaned, they can reach the cleaning roller unit 28 via the passage 212 and be carried along by it. The guide elements 234 improve the coarse dirt collection. The corresponding impact surfaces 244, 246 ensure targeted delivery to the cleaning roller unit 28. The impact surfaces 250, 252 ensure improved collection of coarse dirt particles 204 by the cleaning roller unit 28. Coarse dirt particles 204 that then detach from the cleaning roller unit 28, for example, are also "reflected back" to achieve improved collection.

[0262] Basically, the sweeping element 206 is positioned at a short distance from the cleaning roller unit 28 and rests against it or protrudes into it, at least with the guide elements 234. The guide elements 234 reduce the passage 212 to the installation plane 26 (to the floor 16). This allows for improved collection of coarse dirt particles 204. Coarse dirt particles 204 can be thrown by the cleaning roller unit 28 against the guide elements 234 and, to a certain extent, become trapped between the cleaning roller unit 28 and the guide elements 234, thereby being transported upwards toward the scraping element 178.

[0263] The guide elements 234 have impact surfaces. These ensure that dirt particles bounce off and are thus deflected, thus preventing them from being "pushed" along as the floor cleaning device 10 moves across the floor 16 to be cleaned.

[0264] The result is an optimized cleaning result with optimized coarse dirt absorption.

[0265] A further embodiment of a sweeping device 266, which is shown in Figures 8 to 11 and is arranged on the cassette 94, comprises a one-piece sweeping element 268, which is formed integrally on the wall 112. This sweeping element 268 comprises guide elements 270, which are basically designed like the guide elements 234. These have corresponding impact surfaces as described above, wherein the same reference numerals are used for the same elements as for the guide elements 234.

[0266] Basically, the guide element 270 on the second side 242 follows with its contour between the third impact surface 250 and the second impact surface 246 an outer contour of the cleaning roller unit 28 and is thus formed with a corresponding circular curvature.

[0267] Figure 10 schematically shows the movement components of different coarse dirt particles 204.

[0268] At the impact surfaces 244, 246, a "reflection" occurs into the partial area 258 toward the cleaning roller unit 28. The impact surfaces 250, 252 can be used to clamp the cleaning roller unit 28 for improved entrainment.

[0269] A further embodiment of a sweeping device 272, which is shown in Figures 12 to 15, comprises a sweeping element 274 with guide elements 276. The sweeping element 274 is arranged on the cassette 94 and, for example, is connected to the wall 112 or formed integrally therewith.

[0270] The guide elements 276 are generally arranged inclined relative to the longitudinal axis of the cassette 94 or the rotation axis 94 of the cleaning roller unit 28.

[0271] They, in turn, have a first impact surface 278 and a second impact surface 280 on a first side facing away from the cleaning roller unit 28. On the side facing the cleaning roller unit, they have a third impact surface 282 and a fourth impact surface 284. In the sweeping element 274, the first impact surface 278 and the third impact surface 282 merge directly into one another without any offset or angular arrangement. The second impact surface 280 and the fourth impact surface 284 merge into one another accordingly.

[0272] The first impact surface 278 and the second impact surface 280 are preferably each flat.

[0273] They are located at an acute angle to the longitudinal axis of the cassette 94 or to the rotation axis 98.

[0274] They have an overall wedge-shaped shape.

[0275] The impact surfaces 278, 280, 282, 284 are designed such that the corresponding reflection properties in respective movement components for coarse dirt particles 204 result as described above.

[0276] On the first side of the guide elements 276, the distance between adjacent guide elements decreases towards the cleaning roller unit 28, and this reduction continues on the second side.

[0277] Otherwise, the sweeping device 272 functions as described above.

[0278] The floor cleaning device 10 with sweeping devices 202, 266, 272 has been described as a self-steering and self-propelled floor cleaning device. The corresponding sweeping device can also be used if the floor cleaning device is designed for a standing operator. Such a floor cleaning device 286 is shown schematically in Figure 16. A floor head 288 is provided, to which a support rod device 290 is pivotally connected. Using the support rod device 290, an operator can guide the floor head 288 while standing over the floor 16 to be cleaned, with the main travel direction 24 being provided as the main cleaning direction. A cassette 292 can be provided, on which the corresponding sweeping devices are then located around the cleaning roller unit 28.

[0279] The sweeping device according to the invention with guide elements and / or with a passage 212 and an arrangement of the passage in front of the cleaning roller unit can also be used if, for example, dirt fluid is sucked off from the cleaning roller unit 18, such as via a suction fan device which is located on a holding rod device 290.

[0280] A cleaning roller unit 28 can generally comprise a single, uniform cleaning roller or a plurality of sub-rollers. A plurality of cleaning roller units or a plurality of sub-rollers can be provided. A plurality of cleaning roller units can be provided.

[0281] The corresponding sweeping device 202 was described above as being positioned on a cassette. It can also be used without being arranged on a cassette. For example, it can be mounted directly on the corresponding floor head and not be removable.

[0282] List of reference symbols

[0283] Floor cleaning device

[0284] Ground head

[0285] Floor to be cleaned on the vehicle body

[0286] Wheels a Wheel b Wheel

[0287] wheel axle

[0288] Support roller

[0289] axis of rotation

[0290] axis

[0291] Main direction of travel

[0292] Installation level

[0293] Cleaning roller unit

[0294] Navigation device

[0295] Front end

[0296] Rear end

[0297] Tank combination

[0298] Dirty fluid tank

[0299] Cleaning fluid tank

[0300] bottom

[0301] Top

[0302] wall

[0303] Impact body

[0304] center

[0305] Altitude direction

[0306] Cliff sensor battery compartment cover sensor

[0307] Charging contact

[0308] Outer contour

[0309] First tendon

[0310] Second tendon

[0311] Receiving slot

[0312] Longitudinal direction

[0313] Lid wall

[0314] wall

[0315] First lateral page

[0316] Second lateral side

[0317] side wall

[0318] opening

[0319] drive motor

[0320] drive shaft

[0321] axis of rotation

[0322] First pivot bearing

[0323] cassette

[0324] Lid

[0325] Second pivot bearing

[0326] supporting structure

[0327] wall

[0328] Insertion direction / removal direction

[0329] Holding device

[0330] First holding element

[0331] Second holding element

[0332] Ring element

[0333] opening

[0334] carrier

[0335] Cleaning medium (stock)

[0336] Distribution device

[0337] Connection

[0338] Scraper element Swivel axis Sweeping device Coarse dirt particles Sweeping element Sweeping edge Underside Passage Distance First roller level First space Second space Second roller level Third space Fourth space Direction of rotation Contact area Specific area Guide element Distance Transverse direction First side Second side First impact surface Second impact surface Acute angle Third impact surface Fourth impact surface Acute angle Roller surface Partial area

[0339] Guide element row End guide element Level Outside Sweeping device Sweeping element Guide element Sweeping device Sweeping element Guide element First impact surface Second impact surface Third impact surface Fourth impact surface

[0340] Floor cleaning device floor head

[0341] Holding rod device cassette

Claims

Claims: Floor cleaning device comprising a floor head (12; 288), wherein the floor head (12; 288) defines a mounting plane (26) for a floor (16) to be cleaned, at least one cleaning roller unit (28) which is arranged on the floor head (12; 288) and is rotatable about a rotation axis (94), a drive motor (90) for a rotational movement of the at least one cleaning roller unit (28), and a sweeping device (202; 266; 272) for coarse dirt, which is associated with the at least one cleaning roller unit (28) and which is arranged on the floor head (12; 288), characterized in that the sweeping device (202; 266; 272) has at least one sweeping element (206; 268; 274) which has an underside (210) in a vertical direction (52) perpendicular to the mounting plane (26). is spaced apart from the installation plane (26), wherein at least one sweeping element (206; 268;274) and the installation plane (26) a passage (212) is formed, and that the at least one sweeping element (206; 268; 274) is spatially positioned upstream of the at least one cleaning roller unit (28) during a cleaning process on the floor (16) to be cleaned, relative to a main travel direction (24) of the floor head (12; 288). Floor cleaning device according to claim 1, characterized in that when the floor head (12; 288) moves in the main travel direction (24), a specific area of ​​the floor (16) to be cleaned is first traversed by the at least one sweeping element (206; 268; 274) before this area comes into contact with the at least one cleaning roller unit (28). Floor cleaning device according to claim 1 or 2, characterized in that for a distance (214) of the underside (212) of the at least one sweeping element (206; 268; 274) to the installation plane (26) at least one of the following applies: the distance (214) is at least 0.5 mm; the distance (214) is at most 5.0 mm. Floor cleaning device according to one of the preceding claims, characterized in that a first roller plane (216) is assigned to the floor head (12; 288), which is oriented perpendicular to the installation plane (26) and on which the axis of rotation (94) is located, wherein the first roller plane (216) is a geometric separating plane between a first chamber (218) and a second chamber (220), with at least one of the following: with respect to the main direction of travel (24), the first chamber (218) is located in front of the second chamber (220) and the passage (212) and / or the at least one sweeping element (206; 268; 274) is positioned in the first chamber (218);The passage (212) and / or the at least one sweeping element (206; 268; 274) is positioned in the first chamber (218) and at least one scraper element (178) for removing dirt fluid from the at least one cleaning roller unit (28) is positioned in the second chamber (220); a discharge device for removing dirt fluid from the at least one cleaning roller unit (28) is positioned in the second chamber (220); The at least one sweeping element (206; 268; 274) and at least one scraper element (178) for removing dirt fluid from the at least one cleaning roller unit (28) are spaced apart from each other in a direction perpendicular to the first roller plane (216); between the at least one sweeping element (206; 268; 274) and at least one scraper element (178) lies the axis of rotation (94) of the at least one cleaning roller unit (28) in a direction perpendicular to the first roller plane (216).Floor cleaning device according to one of the preceding claims, characterized in that the floor head (12; 288) has a second roller plane (222) which is parallel to the installation plane (26) and in which the axis of rotation (94) lies, wherein the second roller plane (222) is a geometric separating plane between a third space (224) and a fourth space (226) and the installation plane (26) lies in the third space (224), with at least one of the following: the passage (212) and / or the at least one sweeping element (206; 268; 274) is arranged in the third space (224); at least one scraper element (178) for removing dirt fluid from the at least one cleaning roller unit (28) is arranged in the fourth space (226); A discharge device for removing dirt fluid from the at least one cleaning roller unit (28) is arranged in the fourth space (226). Floor cleaning device according to claims 4 and 5, characterized in that the passage (212) and / or the at least one sweeping element (206; 268; 274) are positioned in the first chamber (218) and the third chamber (224). Floor cleaning device according to any one of the preceding claims, characterized in that, during cleaning operation of the floor cleaning device, a direction of rotation (228) of the at least one cleaning roller unit (28) is parallel to the main direction of travel (24) when rotating about the axis of rotation (94) on the floor (16) to be cleaned, and / or, if the main direction of travel (24) points to the left, a direction of rotation (228) of the at least one cleaning roller unit (28) is clockwise.Floor cleaning device according to one of the preceding claims, characterized in that the passage (212) between the at least one sweeping element (206; 268; 274) and the installation plane (26) is limited in a direction opposite to the main direction of travel by the at least one cleaning roller unit (28). Floor cleaning device according to one of the preceding claims, characterized by at least one of the following: the axis of rotation (94) is parallel to the installation plane (26); a bottom surface (210) of the at least one sweeping element (206; 268; 274) is at least partially parallel to the installation plane (26). Floor cleaning device according to the preamble of claim 1 or one of the preceding claims, characterized in that the sweeping device (202; 266; 272) comprises at least one sweeping element (206; 268; 274) which is spaced apart in a vertical direction (52) perpendicular to the installation plane (26) and which has a plurality of guide elements (234; 270; 276) for dirt particles (204) arranged on the at least one sweeping element (206; 268; 274), wherein adjacent guide elements (234; 270; 276) are spaced apart in a transverse direction to the vertical direction (52) on the at least one sweeping element (206; 268; 274).Floor cleaning device according to claim 10, characterized by at least one of the following: the guide elements (234; 270; 274) are designed as teeth; the guide elements (234; 270; 274) are plow-shaped; the guide elements (234; 270; 274) project beyond a sweeping edge (208) of the at least one sweeping element (206; 268; 274); the guide elements (234; 270; 274) project in the direction of the at least one cleaning roller unit (28); the guide elements (234; 270; 274) project towards the installation plane (26) and in particular form a partial area of ​​an underside (210) of the at least one sweeping element (206; 268; 274). A distance in the vertical direction (52) between a bottom surface (210) of a guide element (234; 270; 274) and the installation plane (26) is smaller than a distance in the vertical direction (52) between a sweeping edge (208) and the installation plane (26), wherein the sweeping edge (208) lies between adjacent guide elements (234; 270; 274); a passage (212) to the at least one cleaning roller unit (28) is formed between a bottom surface (210) of the at least one sweeping element (206; 268; 274) and the installation plane (26), wherein the passage (212) has a meandering course in a viewing direction parallel to the installation plane (26). Floor cleaning device according to claim 10 or 11, characterized in that a distance (236) between adjacent guide elements (234; 270; 274) in the transverse direction (238) is equal to or greater than a distance (214) in the vertical direction (52) between a bottom side (210) of the at least one sweeping element (206; 268; 274) and the installation plane (26).Floor cleaning device according to one of claims 10 to 12, characterized by at least one of the following: the guide elements (234; 270; 274) lie against a bristle (138) of the at least one cleaning roller unit (28), or project into the bristle (138), or have a distance of less than 0.5 mm to the bristle (138); A sweeping edge (208) between adjacent guide elements (234; 270; 274) and beyond which the guide elements (234; 270; 274) project, rests against a bristle (138) of the at least one cleaning roller unit (28), or projects into the bristle (138), or has a distance of at most 1 mm to the bristle (138). Floor cleaning device according to one of the preceding claims, characterized in that the guide elements (234; 270; 274) are each provided with at least one impact surface (244, 246, 250, 252) for dirt particles (204). Floor cleaning device according to claim 14, characterized by at least one of the following: at least one impact surface (244; 246) and in particular two impact surfaces (244, 246) are arranged on one side facing away from the at least one cleaning roller unit (28); at least one impact surface (250; 252) and in particular two impact surfaces (250, 252) are arranged on one side facing the at least one cleaning roller unit (28).Floor cleaning device according to claim 14 or 15, characterized by at least one of the following: the at least one impact surface (244, 246; 250, 252) is oriented at an acute angle (248; ​​254) to the transverse direction (238); the at least one impact surface is arranged and designed such that dirt particles (204) experience a movement component in the direction of an area between adjacent guide elements (234; 270; 274) when rebounding;. The at least one impact surface (244; 246) is arranged and designed such that dirt particles (204) experience a movement component in the transverse direction (238) when rebounding; the at least one impact surface (244, 246, 250, 252) is arranged and designed such that dirt particles (204) experience a movement component towards the at least one cleaning roller unit (28) when rebounding; the at least one impact surface (244, 246, 250, 252) is arranged and designed such that dirt particles (204) experience a movement component in the transverse direction (238) and in a longitudinal direction transverse to the transverse direction (238) and transverse to the vertical direction (52) when rebounding.Floor cleaning device according to one of claims 14 to 16, characterized in that a first guide element (34) has a first impact surface (244) and an adjacent second guide element has a second impact surface (246), wherein the first impact surface (244) and the second impact surface (246) face each other and the distance between the first impact surface (244) and the second impact surface (246) decreases in a longitudinal direction towards the at least one cleaning roller unit (28), and in particular decreases continuously. Floor cleaning device according to claim 17, characterized by at least one of the following: the first impact surface (244) and / or the second impact surface (246) are designed as planes; the first impact surface (244) and the second impact surface (246) are located on one side of the at least one sweeping element (206) facing away from the at least one cleaning roller unit (28); the first impact surface (244) and the second impact surface (246) are at an angle (248) of the same magnitude to the transverse direction (238) or at an angle of different magnitude to the transverse direction (238); the first impact surface (244) on the first guide element (234) and an impact surface (246) corresponding to the second impact surface (246) on the first guide element (234) intersect at an obtuse angle. Floor cleaning device according to claim 17 or 18, characterized in that the first guide element (234) has a third impact surface (250) and the second guide element has a fourth impact surface (252), wherein the third impact surface (250) and the fourth impact surface (252) are facing each other.Floor cleaning device according to claim 19, characterized by at least one of the following: the third impact surface (250) and / or the fourth impact surface (252) are designed as planes; the third impact surface (250) borders the first impact surface (254); the fourth impact surface (252) borders the second impact surface (246); the third impact surface (250) and the fourth impact surface (252) are located on one of the sides of the at least one sweeping element (206) facing the at least one cleaning roller unit (28);. a distance between the third impact surface (250) and the fourth impact surface (252) in the transverse direction (238) increases in a longitudinal direction towards the at least one cleaning roller unit (28); an angle (254) of the third impact surface (250) to the transverse direction (238) is equal in magnitude to an angle of the fourth impact surface (252) to the transverse direction (238); a distance between the first guide element (206) and the second guide element is smallest in the transverse direction (238) at a transition between the first impact surface (244) and the third impact surface (250) and at a transition between the second impact surface (246) and the fourth impact surface (252);The third impact surface (282) is a continuation of the first impact surface (278) and / or the fourth impact surface (284) is a continuation of the second impact surface (280), and in particular, the first impact surface (278) and the third impact surface (282) are arranged at the same angle to the transverse direction (238), and / or the second impact surface (280) and the fourth impact surface (282) are arranged at the same angle to the transverse direction (238). Floor cleaning device according to one of claims 10 to 20, characterized in that the guide elements (234) facing the at least one cleaning roller unit (28) have a roller surface (256) which is oriented parallel to the axis of rotation (94). Floor cleaning device according to claim 21, characterized by at least one of the following: at least one impact surface (250; 252) and in particular two impact surfaces (250, 252) adjoin the roller surface (256); the roller surface (256) contacts a bristle (138) of the at least one cleaning roller unit (28) or projects into the bristle (138) or has a distance of at most 0.5 mm to the bristle (138). Floor cleaning device according to one of the preceding claims, characterized in that the guide elements (234; 270; 276) and in particular the at least one sweeping element (206; 268; 272) are resiliently mounted as a whole on the floor head (12; 288). Floor cleaning device according to one of the preceding claims, characterized in that the guide elements (234; 270; 276) are arranged as a guide element row (260) on the at least one sweeping element (206). Floor cleaning device according to claim 24, characterized by at least one of the following: Guide elements (262) at the ends of the guide element row (260) have a smaller width in the transverse direction (238) than the remaining guide elements and, in particular, half the width of the remaining guide elements; an outer side of guide elements (262) at the ends of the guide element row (260) is planar; The guide element series (260) extends substantially over at least 30% of the length of the at least one cleaning roller unit (28) parallel to the axis of rotation (94) and, in particular, over its entire length. A floor cleaning device according to one of the preceding claims, characterized in that a cleaning fluid tank (40) is provided, and a moistening device is provided with which the at least one cleaning roller unit (28) and / or a floor (16) to be cleaned can be moistened with cleaning fluid from the cleaning fluid tank (40). A floor cleaning device according to one of the preceding claims, characterized in that a dirt fluid tank (38) is provided, into which dirt fluid detached by the at least one cleaning roller unit (28) via at least one scraper element (178) can be received.Floor cleaning device according to one of the preceding claims, characterized by a design as a self-propelled and self-cleaning floor cleaning device, wherein in particular the floor head (12) is or comprises a drive body (14) on which a drive unit for the floor cleaning device and a navigation device (30) for the floor cleaning device are arranged. Floor cleaning device according to one of claims 1 to 27, characterized by a rod assembly (290) which is articulated to the floor head (288), wherein the floor cleaning device can be guided by a standing operator over a floor (16) to be cleaned. Floor cleaning device according to one of the preceding claims, characterized in that the at least one sweeping element (206; 268; 274) is arranged on the floor head (12; 288) in a manner that is wholly or partially interchangeable. Method for operating a floor cleaning device comprising a floor head (12), wherein the floor head (12) defines a mounting level (26) for a floor (16) to be cleaned, at least one cleaning roller unit (28) which is arranged on the floor head (12) and is rotatable about a rotational axis (94), a drive motor (90) for a rotational movement of the at least one cleaning roller unit (28), and a sweeping device (202) for coarse dirt (204) which is associated with the at least one cleaning roller unit (28) and which is arranged on the floor head (12), characterized in that the sweeping device (202) has at least one sweeping element (206).which has a bottom surface (210) spaced apart from the installation surface (26) in a vertical direction (52), wherein a passage (212) is formed between the sweeping element (206) and the installation surface (26), and wherein dirt particles (204) pass through the passage (212) to the at least one cleaning roller unit (28) and are carried away by the at least one cleaning roller unit (28). Method for operating a floor cleaning device according to the preamble of claim 31 or according to claim 31, characterized in that the sweeping device (202) comprises at least one sweeping element (206) on which a plurality of spaced-apart guide elements (234) are arranged, which guide dirt particles (204) via impact surfaces (244, 246, 250, 252) to the at least one cleaning roller unit (28). Method according to claim 30 or 31, characterized by at least one of the following: in a cleaning operation of the floor cleaning device, a direction of rotation (238) of the at least one cleaning roller unit (28) on the floor (16) to be cleaned is in the direction of the passage (212); in a cleaning operation of the floor cleaning device, a direction of rotation (228) of the at least one cleaning roller unit (28) on the floor (16) to be cleaned is parallel to a main travel direction (24); in a cleaning operation of the floor cleaning device, a direction of rotation (228) of the at least one cleaning roller unit (28) is towards guide elements (234) on the at least one sweeping element (206).

Images