Floor cleaning device with movable scraping element

Abstract

A floor cleaning device is provided, comprising a floor head (12) and at least one cleaning roller (28), which rotates about a rotational axis (94) during operation of the floor cleaning device, wherein at least one scraper element (178) with at least one scraper bar (200) is provided, wherein the at least one scraper bar (200) serves to scrape dirt fluid from the at least one cleaning roller (28), wherein a channel device (184) with an inlet opening (188) and an outlet opening (190) is arranged on the at least one scraper element (178), wherein the inlet opening (188) faces the at least one cleaning roller (28) and the outlet opening (190) leads to a dirt fluid tank (38), and wherein the inlet opening (188) of the channel device (184) has a greater maximum width in a lateral direction (214) parallel to the rotational axis (94) than the Outlet (190) of the canal system (184).

Description

[0001] The present application is a divisional application relating to European patent application No. 23 703 169.5 of 1 February 2023, to which full reference is made.

[0002] The invention relates to a floor cleaning device comprising a floor head and at least one cleaning roller which rotates around a rotational axis during operation of the floor cleaning device.

[0003] German patent application DE 10 2016 111 808 A1 discloses a wet cleaning device with a rotatable cleaning roller and a moistening device for applying a liquid to the cleaning roller. The wet cleaning device has a wiper device that can be moved to the cleaning roller to assist in removing liquid and / or dirt from the cleaning roller and / or in assisting in applying liquid to the cleaning roller.

[0004] Floor cleaning equipment is described, for example, in EP 3 750 464 A1, EP 3 884 834 A1, US 2021 / 018620 A1 or KR 2012 06900U.

[0005] WO 2018 / 162092 A1 discloses a floor cleaning device with which autonomous cleaning of a floor surface is possible.

[0006] Floor cleaning equipment is 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.

[0007] DE 20 2015 101 302 U1 discloses a cleaning device in the form of a vacuum cleaner.

[0008] 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.

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

[0010] From DE 20 2009 013 434 U1 a device for wet floor cleaning with a brush which is rotatable about a rotational axis is known.

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

[0012] US Patent 6,026,529 discloses a device for cleaning floors or other hard surfaces.

[0013] A surface cleaning machine with rotating brushes is known from WO 2010 / 041185 A1.

[0014] A cleaning head for a floor cleaning machine is known from US patent 7,665,174 B2.

[0015] From US patent 4,173,054, a floor cleaner is known which includes a handle, a main body, a roller mechanism with a roller with a cleaning belt, a scraper, and a dirt fluid intake.

[0016] From WO 2013 / 106762 A2, a surface cleaning machine is known, comprising 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.

[0017] From US patent 7,921,497 B2, a floor scrubber is known which is manually operated and includes a drive roller coupled to a scrubbing roller.

[0018] Another floor cleaning machine is known from WO 2015 / 086083 A1.

[0019] A hard floor cleaning device is known from US 3,789,449.

[0020] From DE 103 57 637 A1 a self-propelled sweeping device with a sweeping brush and an associated dirt collection chamber is known.

[0021] A household floor cleaning device with a mop roller is known from DE 10 2007 054 500 A1.

[0022] From US patent 2006 / 0272120 A1, a floor cleaning device is known comprising a housing, a hose arrangement and a cleaning head.

[0023] 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.

[0024] From WO 2005 / 087075 A1 a floor cleaning machine with a handle which is pivotably arranged on a base is known.

[0025] The CN 107007215 A reveals a floor cleaning robot.

[0026] DE 20 2018 104 772 U1 discloses a wastewater collection mechanism and wastewater detection mechanism and a cleaning device.

[0027] Cleaning machines are also from AU 2017101723 A4, CN 206687671 U, DE 20 2016 105 300 U1, US 9,622,637 B1, CN 205359367 U, US 2017 / 0119225 A1, CN 205181250 U, CN 205181251 U, CN 205181256 U, DE 20 2016 105 299 U, WO 2017 / 059602 A1, WO 2017 / 059600 A1, WO 2017 / 059601 A1, WO 2017 / 059603 A1 or DE 20 2016 105 301 U1 known.

[0028] The invention is based on the objective of providing a floor cleaning device of the type mentioned above, which enables an optimized transfer of dirt fluid from the at least one cleaning roller to a dirt fluid tank.

[0029] This problem is solved according to the invention in the floor cleaning device described above by providing at least one scraper element with at least one scraper strip, wherein the at least one scraper strip serves to scrape dirt fluid from the at least one cleaning roller, in that a channel device with an inlet opening and an outlet opening is arranged on the at least one scraper element, wherein the inlet opening faces the at least one cleaning roller and the outlet opening leads to a dirt fluid tank, and in that the inlet opening of the channel device has a larger maximum width in a lateral direction parallel to the axis of rotation than the outlet opening of the channel device.

[0030] This allows the dirty fluid (dirt particles and especially a dirt particle-water mixture) to be channeled and fed into the dirty fluid tank in a controlled manner. In particular, this enables pump-free and blower-free filling of the dirty fluid tank.

[0031] Due to the greater maximum width of the inlet opening compared to the outlet opening, the scraper element has a funnel shape. This allows the scraped-off dirt fluid to be easily conveyed into the dirt fluid tank.

[0032] By integrating the channel system into the at least one scraper element, the number of components of the floor cleaning device exposed to the cleaning fluid is kept to a minimum. This, in turn, allows for easy self-cleaning of the floor cleaning device after a cleaning cycle (on a single floor). In principle, cleaning only the at least one scraper element and the at least one cleaning roller is sufficient.

[0033] It is advantageous if the channel system between the inlet and outlet is funnel-shaped, at least in the lateral direction. This ensures optimal drainage of the cleaning fluid from the at least one cleaning roller to a cleaning fluid tank.

[0034] It is advantageous if at least one of the following is provided: The channel assembly comprises exactly one channel with an inlet and an outlet; the maximum width of the inlet in the lateral direction is at least three times greater than the maximum width of the outlet; the inlet has a greater maximum height in a vertical direction perpendicular to the lateral direction than the outlet; the inlet is arranged and / or formed in a mirror-symmetrical manner with respect to a median plane of the at least one scraper element; the outlet is arranged and / or formed in a mirror-symmetrical manner with respect to a median plane of the at least one scraper element; the channel assembly is arranged and / or formed in a mirror-symmetrical manner with respect to a median plane of the at least one scraper element; the outlet is arranged and / or formed in a mirror-symmetrical manner with respect to a median plane of the at least one scraper element; the outlet is arranged centrally on the at least one scraper element in the lateral direction and with respect to the inlet.

[0035] If the channel system has exactly one channel with the inlet and outlet, then, with a simple manufacturing design of at least one scraper element, controlled dirt fluid can be removed from the at least one cleaning roller.

[0036] Optimized dirt removal is achieved in particular when the maximum width of the inlet opening is at least three times greater than the maximum width of the outlet opening.

[0037] It can also be provided that the channel system with at least one channel is funnel-shaped with respect to a vertical direction perpendicular to the horizontal direction, whereby the inlet opening then has a greater maximum height in the vertical direction than the outlet opening.

[0038] With a mirror-symmetrical design of the inlet opening relative to a central plane of the at least one scraper element, a controlled discharge of dirt fluid from the at least one cleaning roller is achieved with a simple manufacturing process for the at least one scraper element. For the same reason, it is advantageous if the outlet opening is designed or arranged in a mirror-symmetrical manner, the channel assembly is designed or arranged in a mirror-symmetrical manner, and the outlet opening is positioned centrally on the at least one scraper element in the width direction relative to the inlet opening.

[0039] In an advantageous embodiment, the outlet opening has a triangular shape, in particular with at least one of the following: A drip edge is assigned to the outlet opening; a triangular tip of the triangular shape is arranged centrally on the at least one scraper element with respect to the width direction and points to a mounting plane of the floor cleaning device.

[0040] The triangular shape allows for the simple creation of a drip edge. This results in an optimized transition from the channel of the at least one scraper element to a dirt fluid tank. The amount of dirt accumulating outside the at least one cleaning roller and the at least one scraper element (and the dirt fluid tank) can be kept to a minimum.

[0041] It is particularly advantageous if the inlet opening is limited by at least one scraper bar towards the floor level of the cleaning device. This minimizes the backflow of scraped-off cleaning fluid over the cleaning roller. This results in optimized removal of the cleaning fluid from the cleaning roller.

[0042] For the same reason, it is advantageous if the at least one scraper strip has a first area and a second area, wherein the first area and the second area are at an angle to each other and / or to the width direction, in particular with at least one of the following: the first area and / or the second area have a straight extent; the first area and the second area lie at an obtuse angle to each other; the first area and the second area each lie at an acute angle and, in particular, at an acute angle of the same magnitude to the latitude direction.

[0043] The at least one scraper strip thus has, to a first approximation, a V-shape in at least one section and exhibits a forked joint. The first section and the second section are arms that are at an angle to each other and also at an angle to the lateral direction.

[0044] In principle, the first area and the second area can meet at a fork point, with this fork point then being part of the scraper bar.

[0045] In one embodiment, a third area lies between the first area and the second area of ​​the at least one scraper strip, which is connected to the first area and the second area, in particular to at least one of the following: The third area has a straight extent; the third area lies parallel to the latitude direction; the third area is mirror-symmetrical to the first area and the second area; the third area has a shorter length than the first area and the second area.

[0046] A junction point between the first and second sections (in a V-shape) is then a geometric point (an imaginary point) that does not lie on at least one of the scraper strips. The first and second sections are connected by the third section, which is spaced apart from the junction point.

[0047] The third area results in optimized wiper action. It allows for the effective contact length of the at least one wiper bar on the at least one long cleaning roller to be designed, thus enabling effective wiper action. This largely prevents the backflow of wiped-off dirt fluid over the at least one cleaning roller and achieves optimized conveyance into a dirt fluid tank, and in particular directly into a dirt fluid tank.

[0048] Furthermore, it is advantageous if at least one of the following is provided: Each cleaning roller is assigned exactly one scraper element; the at least one cleaning roller has a covering and in particular a textile covering, and the at least one scraper strip lies against the covering or projects into the covering during operation of the floor cleaning device.

[0049] This allows the number of components to be kept to a minimum. This, in turn, reduces the number of components of the floor cleaning device that need to be cleaned.

[0050] If at least one cleaning roller has a textile covering, the floor cleaning device offers an optimized wet mopping function. By positioning and, in particular, extending the at least one scraper bar into the covering, dirt and grime can be effectively removed.

[0051] It is advantageous if at least one of the following is also provided: The at least one scraper bar defines an inlet opening for the cleaning fluid on the at least one scraper element; relative to a vertical axis of the floor cleaning device, the at least one scraper bar defines an inlet opening on the at least one scraper element downwards towards a mounting plane of the floor cleaning device, and in particular only downwards; the at least one scraper element is arranged in the operation of the floor cleaning device above a central axis of the at least one cleaning roller, relative to a vertical axis of the floor cleaning device and a mounting plane of the floor cleaning device; the conveyance of cleaning fluid from the at least one cleaning roller to a cleaning fluid tank, with the scraping of cleaning fluid from the at least one cleaning roller by the at least one scraper bar, takes place according to the overthrow principle;The at least one scraper strip is arranged on one side at the inlet of a channel device of the at least one scraper element.

[0052] If the at least one scraper bar defines an inlet opening for dirt fluid and at least one scraper element, and in particular limits it on one side downwards, this results, on the one hand, in an optimized scraping result of dirt fluid from the at least one cleaning roller, and on the other hand, it effectively keeps backflow of scraped dirt fluid to the at least one cleaning roller to a minimum or even prevents it.

[0053] If the at least one scraper element, relative to its inlet opening, is positioned above the central axis of the at least one cleaning roller during operation of the floor cleaning device, the dirt fluid can be coupled into the channel of the at least one scraper element in a controlled manner according to the overflow principle. This results in optimized dirt fluid removal. Furthermore, the backflow of detached dirt fluid to the at least one cleaning roller can be minimized.

[0054] Furthermore, in one embodiment, the at least one cleaning roller rotates in a specific direction during operation of the floor cleaning device such that the flow direction of the dirt fluid from the inlet of the at least one scraper element into at least one channel of the at least one scraper element is the same as the direction of rotation. This results in optimized dirt fluid removal. Backflow of dirt fluid from the at least one channel to the at least one cleaning roller is minimized.

[0055] For the removal of dirt fluid, it is advantageous if the at least one scraper element has a channel system with at least one channel, wherein the bottom of the at least one channel is inclined at an acute angle towards an outlet opening relative to the floor level of the floor cleaning device. This supports the flow of dirt fluid into the at least one channel by gravity, resulting in optimized drainage. The risk of scraped dirt fluid flowing back from the at least one channel towards the at least one cleaning roller is minimized.

[0056] In an advantageous embodiment, the at least one scraper element has a channel assembly with at least one channel, wherein an impact surface for dirt particles is arranged on a channel ceiling of the at least one channel, which directs dirt particles towards an outlet opening. It is possible that, during rotation of the at least one cleaning roller, dirt particles, and in particular coarse dirt particles, are carried along by a cleaning element. These particles then detach, particularly due to centrifugal forces, in the area of ​​the inlet opening and are then carried into the at least one channel. The impact surface allows such dirt particles to be directed towards the outlet opening and thus also discharged in an optimized manner. They then cannot accumulate in the at least one channel.

[0057] In one embodiment, the inlet of a channel assembly of the at least one scraper element has an upper boundary relative to a vertical axis of the floor cleaning device and a lower boundary spaced apart from the upper boundary. The at least one scraper bar is arranged at the lower boundary and / or forms the lower boundary. During operation of the floor cleaning device, the at least one cleaning roller rotates in one direction from the upper boundary to the lower boundary. In particular, a portion of the at least one cleaning roller is supplied with cleaning fluid, which then rotates towards the inlet. This results in optimized wetting of the at least one cleaning roller with cleaning fluid and optimized scraping of dirt fluid.

[0058] In an advantageous embodiment, the at least one scraper bar extends over at least the entire effective cleaning length of the at least one cleaning roller and, in particular, extends outwards beyond the effective cleaning length. This results in the removal of dirt fluid from the at least one scraper bar over the entire effective cleaning length of the at least one cleaning roller. With respect to the effective cleaning length, virtually all areas of the at least one cleaning roller are subjected to scraping action by the at least one scraper bar. The effective cleaning length of the at least one cleaning roller is a length along a longitudinal axis of the at least one cleaning roller (which is parallel to the axis of rotation) on which a corresponding bristle for cleaning a floor is arranged.

[0059] It is particularly advantageous if at least one of the following is provided: A hair comb device is arranged on the at least one scraper element; a hair comb device is arranged downstream of the at least one scraper bar on the at least one scraper element with respect to a direction of rotation of the at least one cleaning roller.

[0060] The hair comb device allows hair to be picked up by the at least one cleaning roller, resulting in optimized cleaning performance. Because the hair comb device is integrated into the at least one scraper element, the number of components required is kept to a minimum. This minimizes the number of parts of the floor cleaning device exposed to dirt. Furthermore, this design facilitates easy cleaning of the floor cleaning device itself after cleaning. When cleaning the at least one scraper element, the hair comb device can also be cleaned at the same time.

[0061] Optimized removal of dirt fluid is achieved when the hair comb device is positioned downstream of at least one scraper bar. This means it does not interfere with the scraping process.

[0062] A floor cleaning device according to the invention can be self-propelled and self-steering, and in particular can be designed as a cleaning robot, and especially as a mopping robot, wherein a drive unit for the floor cleaning device and a navigation device for the floor cleaning device are arranged, in particular, on a drive unit. The drive unit essentially corresponds to the floor head (in particular without a tank unit).

[0063] It is also possible that the floor cleaning device is designed for manual guidance and in particular has a rod device which is arranged on the floor head, whereby the floor cleaning device can be guided by a standing operator over a floor to be cleaned.

[0064] The invention further aims to provide a floor cleaning device of the type mentioned above, which can be easily cleaned itself after a cleaning process on a floor to be cleaned.

[0065] This problem is solved according to the invention in a floor cleaning device of the type mentioned at the outset by the fact that the at least one cleaning roller is held at least partially on the floor head by a holding device, wherein the holding device with the at least one cleaning roller is removable from the floor head, wherein at least one scraper element with at least one scraper bar is movably arranged on the holding device, wherein the at least one scraper bar serves to scrape off dirt fluid from the at least one cleaning roller, and wherein the at least one scraper element with the holding device is removable from the floor head, and wherein the at least one scraper element is removable from the holding device when the holding device is removed from the floor head and / or is movable on the holding device in such a way that it is movable away from the at least one cleaning roller.

[0066] The at least one scraper element is exposed to dirt during the cleaning operation of the floor cleaning machine (on a floor). It removes the cleaning fluid (dirt particles and especially a dirt particle-water mixture) from the at least one cleaning roller and, in particular, also ensures that the removed cleaning fluid is transported into a cleaning fluid tank. It therefore becomes dirty itself and must be cleaned.

[0067] The movable arrangement of the at least one scraper element on the holding device allows the at least one scraper element, along with the at least one cleaning roller, to be removed from the floor head. The movable (including removable) arrangement on the removed holding device allows it to be positioned for easy cleaning. Furthermore, this provides good access to the at least one cleaning roller for cleaning or removal.

[0068] The movable arrangement of the at least one scraper element on the holding device is also advantageous during the cleaning operation of the floor cleaning device. In particular, the movable arrangement allows the at least one scraper element to be pressed against the at least one cleaning roller, so that the at least one scraper blade rests against the bristles of the at least one cleaning roller and is, in particular, immersed in the bristles. This contact or immersion can be achieved by the movable arrangement regardless of the diameter of the at least one cleaning roller (within certain limits), thus guaranteeing optimized cleaning operation even when the at least one cleaning roller is worn. Furthermore, this arrangement also compensates for certain manufacturing tolerances and the like.

[0069] It is particularly advantageous if a hair comb device is arranged on the at least one scraper element, which collects hair from the at least one cleaning roller. The positioning of this device on the removable holding device then allows the operator to easily clean the at least one scraper element.

[0070] It is advantageous to incorporate a spring mechanism with at least one spring, which, when at least one cleaning roller is fixed to the floor head, acts on at least one scraper element, pressing the scraper element against the cleaning roller. This results in an optimized cleaning outcome (within certain limits), regardless of the specific diameter of the cleaning roller. It also compensates for wear on the cleaning roller (within certain limits), such as a reduction in diameter. Furthermore, tolerances, for example, in the manufacturing of the floor cleaning device, can be compensated for. The same optimized cleaning result is achieved regardless of these tolerances and roller wear.

[0071] It is advantageous if a spring force of the spring assembly acts transversely to the axis of rotation. This allows the at least one scraper bar of the at least one scraper element to be pressed against or into a covering of the at least one cleaning roller.

[0072] In a structurally advantageous embodiment, the spring device is fixedly arranged on the base head and is supported by the at least one scraper element, in particular by at least one of the following: The spring assembly is loosely supported on the at least one scraper element; when the holding device is removed from the base head, the spring assembly remains on the base head.

[0073] This allows the scraper element and the holding device to be designed in a structurally advantageous way. It is sufficient to provide a support surface on the scraper element. This, in turn, results in easy cleaning.

[0074] In one embodiment, the spring assembly is arranged on a wall of a receiving shaft in the floor head for the at least one cleaning roller. This results in a simpler design. The floor cleaning device can be made more compact.

[0075] It is advantageous if at least one of the following is provided: The wall with the spring device is adjacent to a dirt fluid tank located at the bottom head; the wall forms a wall of a receptacle for a section of a tank, the tank being in particular a cleaning fluid tank; the spring device is located at an end face of the wall; a spring force of the spring device acts parallel to a vertical axis of the floor cleaning device; the bottom head has a front end and a rear end with respect to a main direction of travel, and the wall is located closer to the rear end than to the front end.

[0076] If the wall with the spring mechanism is adjacent to a dirt fluid tank located at the base, a compact design is achieved. This allows, for example, the compact realization of a floor cleaning device that is self-propelled and self-steering.

[0077] If the wall itself forms the wall of a receptacle for a section of a tank, a compact design results. For the same reason, it is advantageous if the spring mechanism is located at an end face of the wall, the spring force acts parallel to the vertical axis, and the wall is situated at a rear end of the bottom head.

[0078] In one embodiment, the spring assembly is supported against a wall of a channel within the at least one scraper element, whereby, during operation of the floor cleaning device, the channel transports cleaning fluid from the at least one cleaning roller to a cleaning fluid tank. This allows the at least one scraper element to be designed compactly. This, in turn, makes it easy to clean itself.

[0079] In one embodiment, the spring assembly has a plurality of spaced-apart support elements for the at least one scraper element, wherein one support element has an inclined surface to facilitate the insertion of the holding device. In particular, one support element is mounted on a spring. By providing an inclined surface, the holding device can be easily inserted into the floor head, thereby achieving appropriate spring action on the at least one scraper element during operation of the floor cleaning device.

[0080] In a structurally advantageous embodiment, the at least one wiper element is pivotably mounted on the holding device about a pivot axis at a swivel bearing, in particular with at least one of the following: The pivot axis is oriented parallel to the axis of rotation; the pivot axis is oriented transversely and, in particular, perpendicular to a main direction of travel of the floor cleaning device; the at least one scraper element can be folded away from the at least one cleaning roller at the pivot bearing in order to be able to remove the at least one cleaning roller from the holding device and / or to be able to clean the at least one scraper element.

[0081] This allows the at least one scraper element to be easily pressed against the at least one cleaning roller with a force, and in particular a spring force, transverse to the axis of rotation of the at least one cleaning roller. By providing a pivot bearing, the at least one scraper element can be easily folded away from the at least one cleaning roller at the holding device and also removed.

[0082] The appropriate alignment of the swivel axis results in a compact design of the base head.

[0083] In a manufacturing-technically simple embodiment, the swivel bearing has a plurality of spaced-apart shaft stubs, to which one or more counter elements are assigned, in particular with at least one of the following: The shaft stubs are arranged on the at least one scraper element or the holding device, and the counter element(s) are arranged on the holding device or on the at least one scraper element; the counter element(s) for the shaft stubs are designed as receiving hooks, wherein the shaft stubs are removable from the counter element(s), and thereby the at least one scraper element is removable from the holding device; at least two shaft stubs are provided, and in particular, each shaft stub has its own counter element.

[0084] A shaft stub is a pin element, wherein a corresponding pivot bearing and a pivot bearing area are formed by the combination of counter element and pin element, wherein the counter element rotates around the pin element, or the pin element rotates on the counter element.

[0085] If the shaft stubs are arranged on the at least one scraper element or the holding device, and the counter element(s) are also arranged on the holding device or the at least one scraper element, then the at least one scraper element can be easily cleaned. In a structurally advantageous embodiment, all shaft stubs are positioned on the holding device and all counter elements are on the at least one scraper element.

[0086] By designing the counter element(s) as a receiving hook, it is easy to fold away and / or remove at least one scraper element from the holding device.

[0087] The following description of preferred embodiments, in conjunction with the drawings, serves to further explain the invention. The drawings show: Figure 1 is a perspective view of an embodiment of a floor cleaning device with a floor head and a tank assembly attached to it; Figure 2 is a bottom view of the floor cleaning device according to Figure 1 in direction A according to Figure 1 Figure 3 shows another view of the floor cleaning device according to Figure 1 with removed cassette or holding device for a cleaning roller; Figure 4 the floor cleaning device according to Figure 1with the dirt fluid tank removed; Figure 5 the floor cleaning device according to claim 1 with a removed tank combination of cleaning fluid tank and dirt fluid tank; Figure 6 a bottom view of the floor cleaning device according to Figure 5 with the tank combination removed in direction B according to Figure 5 Figure 7 shows the same view as Figure 6 with the cleaning roller removed; Figure 8 the floor cleaning device according to claim 1 with the holding device or cassette removed, with the dirt fluid tank removed and with the cleaning fluid tank removed; Figure 9 a bottom view of the floor cleaning device according to Figure 8 in direction C according to Figure 8 (with the holding device or cassette and tanks removed); Figure 10: a perspective view of a holding device / cassette when removed from the floor cleaning machine, the holding device / cassette holding a cleaning roller; Figure 11: the same view as Figure 10with the cleaning roller removed; Figure 12 shows a bottom view of the holding device / cassette according to Figure 11 in direction E according to Figure 11 Figure 13 shows another embodiment of a holding device or cassette in a similar view to Figure 11 without scraper element; Figure 14 a similar view to Figure 11 of a further embodiment of a holding device / cassette with the wiper element removed; Figure 15 an embodiment of a wiper element which is attached to the holding device / cassette according to Figure 10 is arranged; Figure 16 shows another view of the holding device / cassette according to Figure 10 with the wiper element removed; Figure 17 a sectional view of the holding device / cassette (with fixed cleaning roller) in plane D according to Figure 10 Figure 18 shows a sectional view of the floor cleaning device in the area of ​​a rear end with the cleaning roller; Figure 19 shows the holding device / cassette according to Figure 10with a different pivot position of a scraper element; Figure 20 shows a similar view to that shown in Figure 20. Figure 19 in an intermediate state during the removal of the cleaning roller from the holding device / cassette; Figure 21 a partial representation of area X according to Figure 18 Figure 22 shows a top view of the holding device / cassette according to Figure 10 with the cleaning roller held in the Y direction according to Figure 10 Figure 23 shows another view of the scraper element according to Figure 15 in direction F according to Figure 15 Figure 24 shows a side view of the scraper element according to Figure 15 Figure 25 shows a view of the scraper element according to Figure 15 in direction E according to Figure 15 Figure 26 shows a view of the scraper element according to Figure 15 in the direction H according to Figure 15 Figure 27 shows a perspective view of an embodiment of a dirty fluid tank with a tank bowl and a tank lid; Figure 28 shows a similar view to Figure 27, wherein the fuel cap is lifted from the fuel tank tray; Figure 29 the fuel cap according to Figure 27 ; Figure 30 den tank cap according to Figure 29 in a view in the direction K according to Figure 29 Figure 31 shows a side sectional view of the dirt fluid tank according to Figure 27 Figure 32 shows a sectional view in one vertical axis of the dirt fluid tank according to Figure 27 Figures 33 to 35 show different views of the dirt fluid tank according to Figure 27 , where a liquid level is schematically indicated; Figures 36(a), (b) the dirty fluid tank according to Figure 27 at different inclinations, with a fluid level schematically indicated; Figures 37(a), (b) the dirt fluid tank according to Figure 27 with different inclinations, with a liquid level schematically indicated; Figure 38 schematically shows the water distribution in the waste fluid tank according to Figure 27, when the floor cleaning device or the dirt fluid tank is upside down; and Figure 39 shows a further embodiment of a floor cleaning device according to the invention.

[0088] One embodiment of a floor cleaning device according to the invention is a self-propelled and self-steering floor cleaning device ( Figures 1 to 9 This floor cleaning device 10 comprises a floor head 12, which includes a self-propelled and self-steering drive unit 14. In a cleaning operation, the floor cleaning device 10 with its drive unit 14 is positioned on a floor 16 to be cleaned (see, for example, Figure 1). Figure 18 ) set up.

[0089] A drive unit (not shown in the drawings) is arranged on the chassis 14. This drives wheels 18. In one embodiment, a first wheel 18a and a second wheel 18b are provided.

[0090] The wheels 18 are driven by the drive system to rotate around a wheel axle 19.

[0091] A support roller 20 is also arranged on the chassis 14, which has a pivot axis 21. The support roller 20 is pivotable about a (steering) axis 22, which is perpendicular to the pivot axis 21.

[0092] 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 axis of rotation 21 and in a pivoting movement about the axis 22).

[0093] A change of direction of the floor cleaning device 10 at the floor head 12 is effected by appropriate control of the wheels 18a and 18b by a control device which is arranged on the chassis 14, wherein in particular for a change of direction these are rotatable at different speeds.

[0094] In principle, it can also be provided that the support roller 20 is an active steering roller for directional control of the ground unit 10.

[0095] 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 such that its axis of rotation 21 is parallel to the wheel axle 19.

[0096] The base head 12 has an installation level 26 above the drive body 14 (compare Figure 18 The mounting level 26 is defined by the wheels 18 and the support roller 20. A cleaning roller 28 is located on the mounting level 26.

[0097] A navigation device 30 is arranged on the drive unit 14. The navigation device 30 is a sensor device and comprises at least one sensor element. The navigation device is connected to the control device for controlling the driving 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.

[0098] The vehicle body 14 has a front end 32 and a rear end 34 with respect to the main direction of travel 24. A tank combination 36, consisting of a dirt fluid tank 38 and a cleaning fluid tank 40, is detachably mounted on the vehicle body 14 in the area of ​​the rear end 34. This will be explained in more detail below.

[0099] The term "dirt fluid" refers to a fluid that is generally flowable. It can be composed of dirt particles or it can be a mixture of dirt particles and a liquid (especially water, possibly with a surfactant cleaning agent additive).

[0100] The chassis 14 has a lower surface 42 and a top surface 44 opposite the lower surface. The wheels 18 and the support roller 20 are arranged on the lower surface 42. The navigation device 30 is arranged, at least partially, on the top surface 44.

[0101] Between the underside 42 and the upper side 44, the vehicle body 14 has a wall 46.

[0102] A bumper 48 is arranged on the wall 46 in the region of the front end 32, which allows collisions of the floor cleaning device 10 with obstacles to be detected tactilely. The bumper 48 is or comprises one or more tactile sensor elements that are connected to the control unit via a signal.

[0103] The bottom head 12 is assigned a center 50 ( Figure 1 The center 50 is a geometric center of gravity of the base 12 (with tanks 38, 40). A vertical direction (axial direction) 52 perpendicular to the installation plane 26 can be assigned to this center 50, and correspondingly 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 at least 150°.

[0104] The underside of the drive unit is equipped with 42 cliff sensors 54, which are connected to the control unit and transmit signals. These cliff sensors 54 serve to prevent the floor cleaning device 10 from falling, for example when reaching a staircase, by detecting the presence of cliffs.

[0105] The floor cleaning device 10 has a rechargeable battery system, which is arranged on the chassis 14. For example, a corresponding battery compartment 56 (see figure) Figure 2 ) provided, which is accessible from the underside 42 and is closed by a cover 58.

[0106] The vehicle body can be fitted with additional elements such as a sensor 60 for carpet detection, a WiFi module, etc.

[0107] Charging contacts 62 are also arranged on the chassis in order to be able to charge the battery unit at a charging station.

[0108] In the illustrated embodiment, charging contacts 62 are arranged on the underside 42.

[0109] The bottom head 12, viewed from above in the vertical direction 52 onto the upper surface 44, has an outer contour 64 in the form of a circle. 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).

[0110] It is also fundamentally possible that the outer contour 64 has an approximately circular shape, in which case the distance to the center 50 deviates from a corresponding mean value by a maximum of 15%.

[0111] The vehicle 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, perpendicular to the main direction of travel 24.

[0112] In one embodiment, it is oriented at least approximately parallel to the wheel axis 19.

[0113] With respect to the anterior end 32, the first chord 66 lies beyond the center 50. It lies at the posterior end 34. The center 50 lies between the first chord 66 and the anterior end 32.

[0114] In the top view of the upper surface 44, the tank combination 36 also has the outer contour of a second circular segment with a second chord 68 in the vertical direction 52.

[0115] The first circular segment of the outer contour 64 of the chassis 14 and the second circular segment of the outer contour of the tank combination 36 combine to form the circular outer contour of the bottom head 12.

[0116] The second chord 68 is parallel to the first chord 66 and directly adjacent to it in the case of the tank combination 36 located on the vehicle body 14.

[0117] A receiving shaft 70 for the cleaning roller 28 is arranged or formed on the carriage 14. The receiving shaft 70 is located on the carriage 14 in the region of the rear end 34. The receiving shaft 70 has a longitudinal extension 72, which lies transversely and, in particular, perpendicular to the main direction of travel 24 (compare Figure 9 The longitudinal direction 72 is also at least approximately parallel to the wheel axis 19.

[0118] In one embodiment, the longitudinal extension direction 72 is parallel to the first chord 66.

[0119] The receiving shaft is open to the underside 42 of the vehicle body 14, which is a bottom side (facing the installation level 26), so that a cleaning roller 28 held in the receiving shaft 70 can act on the floor 16 to be cleaned.

[0120] Towards the top 44 and thus away from the bottom 42, the receiving shaft 70 is enclosed by a cover wall 74 (compare Figure 9 ) closed.

[0121] Between the cover wall 74 and the underside 42, the transport body has a wall 76 which borders the receiving shaft 70 towards an interior of the transport body 14. The transport drive, the control unit, etc., are located in the interior of the transport body 14.

[0122] At the rear end 34, a wall 78 is attached to the cover wall 74, which is spaced apart from wall 76. Wall 78, also spaced apart from wall 76, forms a boundary wall for the receiving shaft 70. Wall 78 is spaced apart from the underside 42, meaning it does not extend to the underside (bottom) 42. The receiving shaft 70 is therefore open to the rear end 34 via an opening 80.

[0123] The vehicle body 14 has a first lateral side 82 and an opposite lateral side 84. The lateral sides 82 and 84 are oriented with respect to the main direction of travel 24.

[0124] In the top view in the height direction 52 from above onto the base body 12, the second lateral side 84 follows the front end 32 in a clockwise direction, then the rear end 34 on the vehicle body 14 and subsequently the first lateral side 82.

[0125] A side wall 86 is attached to the first lateral side 82 of the carriage 14. This side wall 86 defines the receiving shaft 70 towards the first lateral side 82. The side wall 86 extends transversely to the first chord 66.

[0126] The side wall 86 follows the circular outer contour 64.

[0127] The receiving shaft 70 has an opening 88 opposite the side wall 86 on the second lateral side 84.

[0128] A drive motor 90 for the cleaning roller 28 is located on the side wall 86.

[0129] The drive motor 90 is supplied with electrical energy by the battery unit in the battery compartment 56.

[0130] It is also possible, in principle, for the drive motor 90 to be located behind the wall 76, for example. A torque transmission device is then arranged on the side wall 86.

[0131] The drive motor 90 is associated with a drive shaft 92, which can be rotated about a rotation axis 94.

[0132] The drive shaft 92 projects into the receiving shaft 70. During operation of the floor cleaning device 10, it is non-rotatably connected to the cleaning roller 28. The drive shaft 92 drives a rotational movement of the cleaning roller 28 about an axis of rotation which coincides with the axis of rotation 94.

[0133] 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.

[0134] The drive shaft 92 is rotatably mounted. In the illustrated embodiment, it is mounted directly on the drive motor 90. It forms a first rotary bearing 96 for the rotating support of the cleaning roller 28 during rotation about the axis of rotation 94.

[0135] The axis of rotation 94 lies transversely and, in particular, perpendicularly to the main direction of travel 24.

[0136] The axis of rotation 94 lies parallel to the installation plane 26.

[0137] The axis of rotation lies transversely and, in particular, perpendicularly to the height direction 52 (which is a normal axis to the installation plane 26).

[0138] Furthermore, the axis of rotation 94 is in particular parallel to the wheel axis 90. It is also in particular parallel to the first chord 66.

[0139] The longitudinal extension direction 72 of the receiving shaft 70 is parallel to the axis of rotation 94.

[0140] The floor cleaning device 10 comprises a cassette 98 (for example, Figures 3, 8, 10 to 14, 16, 17). The cassette 98 serves to hold the cleaning roller 28 in the receiving shaft 70 during operation of the floor cleaning device 10, and to hold the cleaning roller 28 when inserting it onto the carriage 14 and when removing it from the carriage 14.

[0141] A cassette is understood to be an inherently rigid or stable structure, which is, in a sense, a receiving container for the cleaning roller 28 (but does not necessarily have to be closed), and can be handled as an independent unit.

[0142] The cassette 98 includes 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 into the chassis 14, the cover 100 lies opposite the side wall 86.

[0143] The cover 100 is adapted in its geometric shape to the outer contour 64 of the vehicle body 14 and is in particular designed to be curved accordingly in order to follow the circular contour.

[0144] A locking device 102 is provided to fix the cover 100 to the carriage 14 and thus to lock the cassette 98 to the carriage 14. This device includes, for example, a release button 104, which is arranged on the carriage 14 and acts on a pawl. In one embodiment, a counter element 106 for the pawl is arranged on the cover 100, the counter element 106 having an opening into which the pawl can be inserted. By actuating the release button 104, the pawl, which is spring-loaded, can be released from the counter element 106, thus releasing the corresponding locking of the cover 100 to the carriage 14.

[0145] A second pivot bearing 108 is mounted on the lid for the rotation of the cleaning roller 28 around the axis of rotation 94 (see, for example, the Figure 11 and 17 ).

[0146] In one embodiment, the second rotary bearing 108 is designed as a ball bearing.

[0147] The cleaning roller 28 can be fixed in a rotationally fixed position on the second rotary bearing 108.

[0148] When the cassette 98 is properly fixed to the carriage 14, the cleaning roller 28 is rotatably mounted opposite each other at the first pivot bearing 96 and the second pivot bearing 108. The cleaning roller 28 is supported at its opposite end faces. It is held on both sides between the first pivot bearing 96 and the second pivot bearing 108. The cleaning roller 28 is suspended within the receiving shaft 70 between the first pivot bearing 96 and the second pivot bearing 108, supported at its respective end faces. This allows the use of cleaning rollers 28 with a greater length (in a longitudinal direction parallel to the axis of rotation 94) and enables the absorption of larger torsional moments. This prevents the cleaning roller 28 from wobbling.

[0149] The cassette 98 includes a support structure 110, which sits on the lid 100 and ensures the corresponding stability or rigidity of the cassette 98.

[0150] The second rotary bearing 108 is positioned at a distance from this support structure 110 on the cover 100.

[0151] In one embodiment, the supporting structure 110 is or comprises a wall 112 which is fixed to the cover 100.

[0152] The wall 112 has a cylindrical shell shape. It extends in a longitudinal direction 114. When the cassette 98, with the cleaning roller 28 in turn held on the transport body 14, is mounted on it, the longitudinal direction 114 of the cassette 98 is parallel to the axis of rotation 94. It is also parallel to the longitudinal direction of the receiving shaft 70.

[0153] 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 (compare Figure 7 and 9 The wall 112 forms a cover and thus a protective wall between the cleaning roller 28 and the drive body 14. This largely prevents contamination of the drive body 14 during operation of the floor cleaning device 10; the wall 112 keeps dirt away from the corresponding walls 74, 76 of the drive body 14.

[0154] To hold and position the cassette 98 in the receiving shaft 70 in a defined manner, a guide device 116 is arranged on the receiving shaft 70 (compare Figure 9 The cassette 94 has a correspondingly adapted counter-guiding device 118 (compare Figure 16 ) on.

[0155] In one embodiment, the guide device 116 on the receiving shaft comprises a plurality of grooves 120, which extend in the longitudinal direction 72 and cover substantially the entire length of the receiving shaft 70. They are formed on the wall 76.

[0156] In particular, the grooves are spaced 52 apart in the vertical direction.

[0157] The counter-guide device 118 on the cassette 98 comprises strips 122 adapted to a respective groove 120, which extend in the longitudinal direction 114. The strips 122 are arranged on the wall 112 and are positioned on a side facing away from a receiving space for the cleaning roller 28.

[0158] A sliding guide is specifically provided.

[0159] The cassette 98 can be inserted into or removed from the receiving shaft 70 in an insertion / removal direction 124 (direction and opposite direction).

[0160] This insertion / removal direction 124 is, when appropriately aligned, parallel to the longitudinal extension direction 114 of the cassette 98 and the longitudinal extension direction 72 of the receiving shaft 70. In particular, this insertion / removal direction 124 is parallel to the axis of rotation 94.

[0161] The insertion / removal direction 124 is transverse and, in particular, perpendicular to the main travel direction 24.

[0162] A holding device 126 for the cleaning roller 28 is arranged on the cassette 98. The holding device 126 is designed such that it pre-positions the cleaning roller 28 when the cassette 98 is inserted onto the carriage 14 and then ensures automatic coupling of the drive shaft 92 to the cleaning roller 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 28 is automatically removed when the cassette is removed, meaning that the operator's action is limited to removing the cassette 98 and, in particular, the operator does not have to touch the cleaning roller 28.

[0163] Furthermore, the holding device 126 ensures that the cleaning roller 28 is positioned appropriately on the cassette 98 during cleaning operation and, in particular, is held on the first rotary bearing 96 (of the drive shaft 92) and the second rotary bearing 108.

[0164] The holding device 126 has a first holding element 128 and a second holding element 130. The first holding element 128 is formed via the second rotary bearing 108.

[0165] The second retaining element 130 is spaced apart in the longitudinal direction 114 from the first retaining element 128 on the wall 112.

[0166] The second retaining element 130 has a ring element 132 with an opening 134. One axis of the opening 134 is aligned parallel to the longitudinal extension direction 114 of the cassette 98.

[0167] The cleaning roller 28 comprises a carrier 136 on which a cleaning medium 138 is arranged (compare, for example, Figure 17The support 136 is a ring cylinder with openings 140 at least at its end faces. It is also possible that a through opening is present.

[0168] The cleaning medium 138 is a covering which is fixed to the carrier 136. In the configuration as a wet mopping device, the cleaning medium 138 is in particular a textile covering such as a microfiber covering, which is attached to the carrier 136.

[0169] It is also possible that the cleaning medium 138 is formed by bristles, especially if the floor cleaning device 10 is designed as a sweeper.

[0170] For example, it is also possible that the cleaning medium 138 includes both bristles and textile trim areas.

[0171] The first retaining element 128 (the first pivot bearing 96) has a first immersion element 142. The cleaning roller 28 is held rotatably about the axis of rotation 94 on the first pivot bearing 96 (the first retaining element 128) via the first immersion element 142. The first immersion element 142 engages in the carrier 136 at the corresponding opening 140.

[0172] A rotationally fixed coupling is provided by appropriate design of the first immersion element 142 and the support 136 at the corresponding opening 140.

[0173] A support element 144 is provided, which serves to hold the cleaning roller 28 on the second holding element 130 (see, for example, Figure 17 ).

[0174] The support element 144 has a first part 146 and a second part 148.

[0175] The second part 148 of the support element 144 is designed for connection with the cleaning roller 28 and, in doing so, with the carrier 136. When connected, the second part 148 of the support element 144 is immersed in the corresponding opening 140 (which is opposite the opening 140 that, when the cleaning roller 28 is fixed, is closest to the cover 100). A rotationally fixed connection of the second part 148 is achieved by this immersion in the opening 140 of the carrier 136.

[0176] It is fundamentally possible that the support element 144 with its second part 148 is firmly (indetachably) connected to the cleaning roller 28.

[0177] In an advantageous embodiment, the support element 144 with its second part 148 is detachable from the cleaning roller 28. This makes the cleaning roller 28 easier and more cost-effective to manufacture. Furthermore, the cleaning roller 28 is easier to clean, since it then consists essentially only of the carrier 136 and the cleaning medium 138. It can then, for example, be cleaned in a washing machine.

[0178] A second immersion element 150 is arranged on the first part 146. The second immersion element 150 serves to immerse itself in the opening 134 of the second holding element 130. When the support element 144 is fixed to the cleaning roller 28 with the second part 148, the cleaning roller 28 can be held on one side by the first holding element by immersing the first immersion element 142 in the associated opening 140. On the other side, the cleaning roller 28 can be held on the second holding element 130 by immersing the second immersion element 150 of the support element 144 (with the support element 144 held on the cleaning roller 28) in the opening 134 (see, for example, the figure). Figure 10 ).

[0179] The first part 146 is slidably mounted on the support element 144 with respect to the second part 148 and in particular is slidably mounted directly on the second part 148.

[0180] In one embodiment, the second part 148 is cup-shaped with an interior 152. The first part 146 is positioned in the interior 152 and is slidably mounted therein. A direction of displacement 154 (compare Figure 17 ) is parallel to the longitudinal extension direction 114 of the cassette 98 or the rotation axis 94.

[0181] The first part 146 is supported on the second part 148 by a spring assembly 156. The spring assembly 156 comprises at least one spring. A spring force of the spring assembly 156 acts in such a way that it tends to push the first part 146 away from the second part 148, and, when the cleaning roller 28 is seated on the holding device 126, towards the second holding element 130.

[0182] When the first part 146 is to be pressed towards the other end of the cleaning roller 28 with the support element 144 attached to the cleaning roller 28, the spring force of the spring device 156 must be overcome.

[0183] To hold the cleaning roller 28 on the holding device 126 of the cassette 98, the cleaning roller 28 is placed onto the first immersion element 142 at the corresponding opening 140. The cassette 98 is removed from the carriage 14 for this purpose.

[0184] The support element 144 is then inserted into the carrier 136 in the corresponding opening 140, or has already been inserted beforehand.

[0185] The second immersion element 150 on the first part 146 then protrudes beyond an end face of the cleaning roller 28.

[0186] The cleaning roller 28 is then moved by the in Figure 20The first part 126 moves in the position shown towards the second retaining element 130. An operator pushes the first part 126 in the displacement direction 154 towards the cover 100. When the support element 144 reaches the ring element 132, the operator can release the first part 146, and, if properly aligned, the second insertion element 150 then dips into the opening 134. The spring force of the spring assembly 156 pushes the first part 146 with the second insertion element 150 away from the cover 100 and causes the second insertion element 150 to dip into the opening 134.

[0187] The cleaning roller 28 is then held at two stops (at the first holding element 128 and the second holding element 130) on the cassette 98.

[0188] Cassette 98 can then be inserted into recording slot 70.

[0189] The drive shaft 92 protrudes into the receiving shaft 70.

[0190] When the cassette 98, with the cleaning roller 28 held by the holding device 126, is moved into the receiving shaft 70 towards the drive shaft 92, the drive shaft 92 comes into contact with the support element 144 when the cassette 98 is in the appropriate position. The first part 146 has a receptacle 158 for the drive shaft 92. The drive shaft 92 can be connected to the receptacle 158 in a rotationally fixed manner. When the cassette 98 is moved into the receiving shaft 70 until a stop is reached and the cover 100 locks onto the carriage 14 at the locking device 102, the drive shaft 92 is then coupled to the cleaning roller 28 via the support element 144 in a rotationally fixed manner.

[0191] The support element 144 with the first part 146 is designed in conjunction with the drive shaft 92 such that, in this final positioning, the drive shaft acts on the first part 146 and moves it in the displacement direction 154 towards the cover 100. This causes the second insertion element 150 to emerge from the opening 134. When the cassette 98 is moved into the receiving shaft 70, the drive shaft 92, upon contacting the support element 144, causes the first part 146 to move away in the displacement direction 154, i.e., in the opposite direction to the insertion direction of the cassette 98 into the receiving shaft 70.

[0192] This removes the second immersion element 150 from the second retaining element 130, and contact is no longer present. During operation of the floor cleaning device 10, the cleaning roller 28 is then supported at two points: on the drive shaft 92 (the first pivot bearing 96) and on the first retaining element 128 (the second pivot bearing 108).

[0193] The second retaining element 130 has no further effect here.

[0194] The second retaining element 130 is an intermediate element for inserting and removing the cassette 98 from the vehicle body 14.

[0195] When the cassette 98 is removed from the carriage 14, the locking device 102 is first released, and then the cassette 98 is removed from the receiving shaft 70 in the corresponding removal direction 124. This effectively disengages the drive shaft 92 from the support element 144 by "removing" the cleaning roller 28. The spring mechanism 156 then ensures that the second insertion element 150 re-inserts into the second retaining element 130. When the cassette 98 is removed, the cleaning roller 28 is held in place by the retaining device 126, by the first retaining element 128, and by the second retaining element 130.

[0196] When the cassette 98 is inserted, the cleaning roller 28 is held against the holding device 126. The guide device 116 and the counter-guide device 118 automatically align the roller with the drive shaft 92, resulting in a corresponding coupling. Appropriate positive locking elements are provided to ensure a rotationally fixed connection. An operator can achieve this rotationally fixed coupling by rotating the cleaning roller 28 slightly against the holding device 126. The drive shaft automatically disengages the support element 144 from the second holding element 130 when the cleaning roller 28 reaches an operating position on the carriage 14.

[0197] When cassette 98 is removed, the coupling of the support element 144 to the second holding element 130 is established automatically. When cassette 98 is removed, the operator does not need to touch the (dirty) cleaning roller 28; instead, they can simply remove cassette 98 as a container or box for the cleaning roller 28.

[0198] During operation of the floor cleaning machine 10, the drive shaft 92 is torque-actingly coupled to the support element 144 to enable the cleaning roller 28 to rotate about the axis of rotation 94. The cleaning roller 28 is decoupled from the second holding element 130. During operation, the cleaning roller 28 is rotatably coupled to the first holding element 128.

[0199] A cooperating positive locking device 160 is located on the cassette 98 and on the carriage 14 (see, for example, Figure 1). Figures 9 to 11) arranged. This provides an additional coupling between the cassette 98 and the carriage 14 when the cassette 98 is held on the carriage 14, particularly with regard to torsional stresses.

[0200] In one embodiment, the positive locking device 160 comprises a receiving element 162 of an immersion opening 164. In one embodiment, the receiving element 162 is arranged on the second retaining element 130, and in particular on the ring element 132. The immersion opening 164 has an opening direction that is parallel to the longitudinal extension direction 114.

[0201] On the side wall 96 sits an immersion element 166 adapted to the immersion opening 164 (compare Figure 9The immersion element 166 is designed as an immersion pin. When the cassette 98 is fixed to the carriage 14 (with the lid 100 locked), the immersion element 166 is immersed in the immersion opening 164. A positive fit is established in all transverse directions to the longitudinal direction 114. This allows torsional loads to be transferred to the carriage 14.

[0202] A distribution device 168 for cleaning fluid from the cleaning fluid tank 40 is arranged on the cassette 98 and specifically on the wall 112 (compare Figure 16 The distributor device 168 comprises one or more distributor channels 170 with a channel wall 172. The channel wall 172 projects beyond the wall 112 on an outside side of the wall 112, the outside side of the wall 112 facing away from the cleaning roller 28.

[0203] The distribution channel 170 includes openings 174 in the wall 112, which extend from the rear of the wall 112 (facing away from the cleaning roller 28) to a front of the wall 112 (facing the cleaning roller 28). Cleaning fluid can be supplied to the cleaning roller 28 via these openings 174.

[0204] The openings 174 are arranged above the cleaning roller 28 with respect to the vertical direction 152, so that the cleaning medium 138 (the covering of the cleaning roller 28) can be moistened with cleaning fluid accordingly (compare Figure 18 ).

[0205] In particular, the cleaning roller 28 can be driven by gravity with cleaning fluid from the cleaning fluid tank 40 via the distributor device 168 and the openings 174.

[0206] Cassette 98 has a connection 176 which is in fluid-acting communication with the distribution device 168. Connection 176 is a connection of the cassette 98 for a fluid-acting connection with the cleaning fluid tank 40.

[0207] The connection 176 is designed in cooperation with the chassis 14 and the dirt fluid tank 38 in such a way 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 chassis 14 (with locking on the cover 100).

[0208] In particular, a valve device (which is preferably positioned outside the cassette 98) is assigned to the cleaning fluid tank 40, which releases cleaning fluid from the cleaning fluid tank 40 only during the cleaning operation of the floor cleaning device 10.

[0209] Cassette 98 contains no electronic components or the like, or any components that require a power supply.

[0210] A scraper element 178 is held on the cassette 98. The scraper element 178 is, in particular, removable from the cassette 98. In the Figures 23 to 26 An embodiment of a removed wiper element 178 is shown.

[0211] In the exemplary embodiment of the floor cleaning device, exactly one cleaning roller 28 is provided. In particular, exactly one scraper element 178 is assigned to this cleaning roller 28.

[0212] The scraper element 178 serves to scrape dirt fluid from the cleaning roller 28 (from the bristles of the cleaning roller 28) and to guide dirt fluid via a corresponding guide device 180 to the dirt fluid tank 38.

[0213] One embodiment of a scraper element 178 is formed in one piece. It comprises a body 182. A channel assembly 184 is integrated into the body. In one embodiment, the channel assembly 184 comprises a channel 186 with an inlet opening 188 and an outlet opening 190. With the scraper element 178 properly positioned on the cassette 98 and the cassette 98 held on the carriage 14, the inlet opening 188 is directed towards the cleaning roller 28, and the outlet opening 190 is directed, as described in more detail below, towards an inlet opening of the dirt fluid tank 38.

[0214] The scraper element 178 is movably held on the cassette 98. In one embodiment, the scraper element 178 is pivoted about an axis 192 (compare, for example, Figure 1). Figure 11 , 16 or 19 ) held on cassette 98.

[0215] The pivot axis 192 is parallel to the longitudinal extension direction 114 of the cassette 98 or parallel to the rotation axis 94.

[0216] With cassette 98 held on the driving body 14, the pivot axis 192 is transverse and, in particular, perpendicular to the main direction of travel 24.

[0217] In one embodiment, a first shaft stub 194 and a second shaft stub 196 are arranged at intervals on the cassette 98 and on the wall 112 on an outer side facing away from the cleaning roller 28 in the longitudinal direction 114.

[0218] On the body 182 of the stripping element 178, a first hook element 198a and a second hook element 198b are associated with the first wave stub 194 (compare, for example, Figure 10 ).

[0219] A pivot bearing is implemented via the first hook element 198a and the first shaft stub 194, and the second hook element 198b and the second shaft stub 196, which allows the wiper element 178 as a whole to pivot about the pivot axis 192. The hook elements 198a and 198b are open, so that by pulling on the wiper element 178 in a direction transverse to the pivot axis 192, the wiper element 178 can also be removed from the cassette 98.

[0220] In an alternative embodiment, the shaft stubs are located on the scraper element 178 and the associated hook elements are located on the cassette 98.

[0221] A scraper bar 200 is attached to the scraper element 178. The scraper bar 200 serves to remove dirt fluid and, in particular, textile bristles from the cleaning roller 28. This removed dirt fluid can then be discharged via the channel device 184 through the inlet opening 188 into the channel 186 and via the outlet opening 190 to the dirt fluid tank 38.

[0222] The scraper bar 200 is designed to rest against the cleaning medium 138 (the bristles) and, in particular, to extend into the corresponding textile material. This achieves an improved scraping effect. The movable arrangement of the scraper element 178 allows the scraper bar 200 to be pressed into the bristles accordingly. This ensures effective cleaning even when the cleaning roller 28 is worn. Furthermore, tolerances, for example during manufacturing, can be compensated for.

[0223] The body 182 of the wiper element 178 has an underside 202 which faces the cleaning roller 28. The wiper bar 200 projects beyond this underside 202.

[0224] The scraper element 178 has a top surface 204 which faces away from the cleaning roller 28. A support area 206 is located on the top surface 204 (see figure). Figure 24 ) for a spring assembly 208. The spring assembly 208 (see, for example, Figure 9 ) is fixedly arranged on the carriage body 14 and acts on the scraper element 178 when the cassette 98 with the scraper element 178 is fixed to the carriage body 14. In one embodiment, the spring assembly 208 comprises a plurality of springs, each of which has a support element 210 attached ( Figure 9 ).

[0225] In one embodiment, the spring assembly 208 or the springs are attached to the respective support element 210 at an end face of the wall 78 ( Figure 9) arranged.

[0226] The support element 210 is a contact element for the support area 206 of the wiper element 178.

[0227] When the scraper element 178 is mounted on the carriage 14, the spring assembly 208 presses the respective support element 210 against the support area 206. This, in turn, causes the scraper element 178, due to its pivotability about the pivot axis 192, to press against the cleaning roller 28, and in particular, the scraper bar 200 is then pressed into the (especially textile) covering of the cleaning roller 28 (compare, for example, Figure 1). Figure 20 ).

[0228] The spring assembly 208 is rigidly connected to the chassis 14 and is loosely supported on the support area 206 of the scraper element 178.

[0229] In one embodiment, the support elements 210 have an inclined surface 212 ( Figure 9 ), which faces the opening 88 of the receiving shaft 70.

[0230] The inclined surface 212 of the respective support element 210 serves as an insertion aid when inserting the cassette 98 into the receiving shaft 70 in order to establish contact between the respective support element 210 and the support area 206 on the scraper element 178.

[0231] The support area 206 on the upper surface 204 of the scraper element 178 is spaced apart from the pivot axis 192 (see also Figure 15 ).

[0232] Canal 106, with inlet 188 and outlet 190, is funnel-shaped at least with respect to a lateral direction 214. The lateral direction 214 (compare Figure 16 ) is (with the scraper element 178 held on the cassette 98) parallel to the longitudinal extension direction 114 of the cassette 98 or parallel to the rotation axis 94 of the cleaning roller 28.

[0233] The entrance mouth 188 has a maximum first width of 216 in the latitude direction 214 (see, for example, Figure 23 ).

[0234] The exit mouth 190 has a maximum second width of 218 in the latitude direction 214 (compare Figure 25 The first width 216 is larger, and in particular much larger, than the second width 218. The first width 218 is, in particular, at least three times larger than the second width 218.

[0235] In one embodiment, the scraper element 178 is designed to be mirror-symmetrical at least approximately to a median plane 220 (mirror plane) (compare, for example, Figure 25 The canal 186, the inlet 188 and the outlet 190 are mirror images of this central plane 220. At least in the lateral direction, the canal 186 tapers uniformly (mirror image of the central plane 220) from the inlet 188 to the outlet 190.

[0236] The outlet 190 has a triangular shape 222 (compare for example Figure 25). A triangular vertex 224 of this triangular shape 222 lies on the median plane 222 and points (with the scraper element 178 held on the cassette 98 and the cassette 98 held on the drive body 14) in the direction of the installation plane 26.

[0237] A drip edge 226 is associated with the outlet 190. This drip edge 226 is achieved in particular by a corresponding edge formation at the apex 224 of the triangle.

[0238] The scraper strip 200 forms a boundary of the entrance opening 188 towards the installation level 26 (compare Figure 21 In one embodiment, the scraper strip 200 forms a boundary wall of the entrance opening 188 downwards (towards the installation plane 26).

[0239] In one embodiment, the scraper bar 200 is approximately V-shaped.

[0240] It comprises a first area 228 and a second area 230 ( Figure 23The first area 228 and the second area 230 lie at an obtuse angle 232 to each other. The first area 228 and the second area 230 each lie at an acute angle to the latitude direction 214.

[0241] In particular, the first area 228 and the second area 230 each have a straight extent.

[0242] In one embodiment, the first area 228 and the second area 230 intersect at a fork point 231. In a purely V-shaped design, the fork point 231 lies at the first area 228 and the second area 230, and thus on the scraper strip 200.

[0243] In an alternative embodiment, which is described below, the fork point 231 is a purely geometric point or an imaginary point which does not lie on the scraper bar 200.

[0244] Due to the symmetrical design of the scraper element 178, the first area 228 and the second area 230 lie at the same acute angle 234 to the latitude direction 214. However, the corresponding angles are opposite in sign.

[0245] In one embodiment, the scraper bar 200 has a third area 236 ( Figure 23 ), which lies between the first area 228 and the second area 230 and is connected to each of them. A continuous scraper bar 200 without gaps is formed.

[0246] The third area, 236, is currently being trained.

[0247] In one embodiment, it is oriented parallel to the width direction 214. It has a shorter length than the first region 228 or the second region 230.

[0248] This allows the corresponding funnel-shaped channel design 186 to be realized.

[0249] The third area 236 is spaced apart from the fork point 231. The scraper strip 200 therefore does not have a "strict" V-shape, but rather there is a cross connection between the arms of the "V" (the first area 228 and the second area 230) via the third area 236, which is spaced apart from the fork point 231.

[0250] With the scraper element 178 fixed to the vehicle body 14 (via the cassette 98), the third area 236 is closer to the installation plane 26 than the first area 228 and the second area 230.

[0251] A baffle surface 238 is arranged on the scraper element 178 within the channel 186. This is formed or positioned on a channel ceiling 240, which is opposite a channel floor 242.

[0252] The impact surface 238 forms a deflection surface for "flying" dirt particles in order to deflect them towards the outlet opening 190.

[0253] In one embodiment, the channel floor 242 is inclined at an acute angle 244 relative to the installation plane 26 (when the scraper element 178 is properly positioned with respect to the transport body 14 over the cassette 98). See, for example, Figure 22 or 21 This supports the gravity-driven flow of wastewater through channel 186 to wastewater tank 38.

[0254] In one embodiment, a hair comb device 246 is arranged on the wiper element 178 and projects beyond the underside 204. The hair comb device 246 comprises a plurality of pins which serve to pick up hair and, in particular, to remove it from the bristles of the cleaning roller 28.

[0255] In one embodiment, the hair comb device 246 comprises at least one row of pins 248 (in the embodiment shown, two rows of pins are provided), wherein the arrangement of the row follows the course of the stripper bar 200.

[0256] The hair comb device 246 is arranged downwards from the scraper bar 200; it is closer to the mounting plane 26 than the scraper bar 200.

[0257] In particular, the hair comb device 246 is downstream of the scraper bar 200 with respect to a rotation direction 250 of the cleaning roller 28 during operation of the floor cleaning device 10 (compare Figure 18 ).

[0258] The scraper bar 200 is movably arranged on the cassette 94 by means of pivoting about the pivot axis 192, in order to enable, when actuated by the spring device 208, a defined immersion of the scraper bar 200 into a covering of the cleaning roller 28 even in the case of wear, manufacturing play, etc.

[0259] Due to the pivotability of the scraper element 178, it can also be pivoted away from the cleaning roller 28 when the cassette 98 has been removed from the carriage 14 (compare Figure 19 ), to make it easier to insert or remove the cleaning roller 28 from the holding device 126.

[0260] As mentioned above, it may also be provided that the scraper element 178 is removable as a whole from the cassette 98.

[0261] A sweeping device 252 for coarse dirt is arranged on cassette 98 (see, for example, the Figures 11 to 14). This sweeping device 252 is arranged on the supporting structure 110 and in particular on the wall 112.

[0262] In one embodiment, the sweeping device 252 is formed in one piece on the wall 112.

[0263] The sweeping device 252 serves to provide coarse dirt to the cleaning roller 28 or, in a sense, to load it with coarse dirt particles.

[0264] The sweeping device 252 has a sweeping edge 254, which is a lower edge of the wall 112. This sweeping edge 254 is spaced apart from the mounting surface 26 ( Figure 18 ). It faces the cleaning roller 28 and is at a small distance from it or lies against it ( Figure 18 ).

[0265] The sweeping device 252 comprises spaced teeth 256, which are scoop-shaped and project beyond the sweeping edge 254 with a lower portion. A corresponding underside 258 of these teeth is closer to the mounting plane 26 than the sweeping edge 254.

[0266] Due to the distance between the sweeping edge 254 and the mounting surface 26 (and thus also to the floor 16 to be cleaned), coarse dirt particles can pass under the sweeping edge 254 and reach the cleaning roller 28 (compare Figure 18 ).

[0267] The teeth 256, with their reduced distance to the mounting surface 26 compared to the sweeping edge 254, ensure that such coarser dirt particles can be picked up by the floor cleaning device 10 during its operation. Dirt particles are thrown against the teeth 256 by the rotating cleaning roller 28. They can, in effect, be trapped between the cleaning roller 28 and the corresponding teeth 256 and thus carried along by the rotation of the cleaning roller 28 to the inlet opening 188.

[0268] The teeth 256 are plow-shaped, each with a guide surface 260. This guide surface 260 is designed to deflect dirt particles upwards. It is shaped to prevent them from being pushed along.

[0269] It is intended that a distance 262 between adjacent teeth 256 is greater than a distance 264 between the sweeping edge 254 and the mounting plane 26.

[0270] In one embodiment, the tooth 266 which is closest to the first retaining element 128 is designed as a "half tooth" due to its corresponding marginal position (compare Figure 11 ).

[0271] The sweeping device 252 can be made of a soft or hard plastic component. In one embodiment, the sweeping device 252 is detachably held on the cassette 98. The teeth 256 can also be individually removable.

[0272] For example, it is possible that the teeth 256 are made of a different material than the material of the sweeping edge 254.

[0273] It is also possible that, for example, the teeth 256 and / or the reversing edge 254 are spring-mounted. The teeth 256 can be spring-mounted individually or as a toothed strip.

[0274] In one embodiment, the sweeping device 252 has one or more spacers which are located on the installation plane 26.

[0275] In the Figure 14 , 15 Further embodiments of sweeping devices 252' and 252" are shown. In the embodiment according to Figure 13 For example, no second tooth is assigned adjacent to the first retaining element 128.

[0276] In the embodiment according to Figure 14 and also Figure 13 Other tooth shapes are shown.

[0277] It can also be assigned half a tooth corresponding to tooth 266 adjacent to the second retaining element 130 (as an end region) (compare Figure 12 ).

[0278] In particular, the direction of rotation 250 of the cleaning roller 28 on the floor 16 to be cleaned is towards the sweeping device 252 (compare Figure 18 If the floor cleaning device 10 is a self-steering and self-propelled floor cleaning device, then it generally has the main direction of travel 24, although other directions of travel, and even directions contrary to the main direction of travel 24, are also possible. When the floor cleaning device 10 travels in the main direction of travel 24, then, with the direction of rotation 250 towards the floor, the direction of rotation is parallel to the main direction of travel. However, with other directions of travel, and especially opposite to the main direction of travel 24, the rotation is opposite to the direction of travel.

[0279] The described design of the sweeping device 252 makes it possible to effectively pick up coarse dirt even in such directions of travel, where in particular the direction of rotation 250 is against the direction of travel on the floor 16, and in just one pass.

[0280] The cleaning roller 28 is positioned, in a sense, between the scraper bar 200 and the sweeping device 252 (compare Figure 18 ).

[0281] During operation of the floor cleaning device 10, a specific area or sector 268 is moistened with cleaning fluid from the cleaning fluid tank 40 via the distribution device 168 with the openings 174. This area or sector 268 rotates due to the direction of rotation 250 towards the inlet 188 of the scraper bar 200. There, dirt fluid is scraped off the area or sector 268 by the scraper bar 200 and then transported away via the channel 186. This specific area 280 then continues to rotate towards the floor 16 to be cleaned, acting on the floor and loosening dirt. It then continues to rotate in the direction of rotation 250 towards the sweeping device 252. Coarse dirt that is carried away is "caught" on the teeth 256 and carried away by the cleaning roller 28.

[0282] The specific area or sector 268 then returns to the humidification area.

[0283] The area or sector 268, which then rotates towards the scraper bar 200, rotates, in a sense, from above towards the scraper bar 200. The scraper element with the scraper bar 200 and the inlet opening 188 is, in operation of the floor cleaning device 10, positioned above a central axis 270 with respect to the vertical axis 152 (compare Figure 18 ) the cleaning roller 28 is positioned. The conveyance of dirt fluid from the cleaning roller 28 (detached from the corresponding bristles by the scraper bar 200) takes place according to the overthrow principle due to the arrangement of the scraper bar 200 and the inlet opening 188 with respect to the vertical direction 52 above the central axis 270.

[0284] In the tank combination 36, the cleaning fluid tank 40 is positioned above the dirt fluid tank 38, meaning that the dirt fluid tank 38 is closer to the installation level 26 than the cleaning fluid tank 40.

[0285] A recess 272 is formed on the chassis 14 above the wall 78 (see, for example, Figure 5 ).

[0286] The cleaning fluid tank 40 has a tab 274 which is designed for immersion in the receptacle 272.

[0287] Basically, the tab 274 can be arranged on a suitable container, or the tab 274 is designed in such a way that it can also accommodate cleaning fluid.

[0288] A sliding guide 276 is arranged on the mounting 272 and thus on the driving body 14, and corresponding counter elements 278 are arranged on the tab 274.

[0289] A locking device 278 is provided, by which the tab 274 can be locked to the chassis 14 in the receptacle 272.

[0290] The cleaning fluid tank 40 has a top surface 280. When the cleaning fluid tank 40 is inserted into the bottom head 12, this top surface 280 is aligned flush with a top surface of the bottom head 12.

[0291] Accordingly, the tab 274 is set back in the direction towards the mounting plane 26 towards the top surface 280 in order to achieve this flush alignment.

[0292] In one embodiment, an opening 282 is arranged on the tab 274, to which a closure element 284 is assigned. The opening 282 can be closed via the closure element 284. The cleaning fluid tank 40 can be filled with cleaning fluid (pure water or pure water with surfactant additive) via the opening 282.

[0293] The cleaning fluid tank 40 has a connection adapted to the connection 176 on the cassette 98.

[0294] As mentioned above, the cleaning fluid tank 40 is specifically equipped with a valve to provide cleaning fluid only during operation of the distribution device 168.

[0295] The dirt fluid tank 38 ( Figures 27 to 38 The assembly comprises a tank tray 286 and a tank cap 288. The tank cap 288 is attached to the tank tray 286 when the dirt fluid tank 38 is closed. The tank cap 288 is removable from the tank tray 286.

[0296] The tank shell 286 has a tank bottom 290 and a circumferential wall 292 projecting from the tank bottom 290. A receiving space 294 for dirty fluid is formed between the wall 292 and the tank bottom 290.

[0297] The wall 292 has a first region 296, which is straight and lies parallel to, or against, the second chord 68. It has a second region 298, which ensures the circumferential closure of the receiving chamber 294. This second region 298 is circular in order to achieve the circular outer contour 64.

[0298] The tank bottom 290 has a receptacle 300 for a roller 302 ( Figure 2 ) formed.

[0299] Roller 302 is located on the mounting level 26. Roller 302 is aligned with support roller 20, particularly with respect to the main direction of travel 24. Roller 302 is also a support roller, but it is not pivotable. It is rotatable about an axis parallel to the wheel axle 19.

[0300] A first post 304 and a second post 306 are spaced apart from each other on the tank bottom. These posts 304 and 306 project upwards from the tank bottom 290.

[0301] In the tank lid 288, continuous recesses 308a and 308b are formed, each corresponding to the post 304 or 306, allowing the respective post 304 or 306 to pass through when the tank lid 288 is placed on the tank shell 286 (compare, for example, Figure 27 ).

[0302] A sealing device 310 is provided, which is arranged around the perimeter of the respective post 304, 306 and / or the recess 308a, 308b and provides a fluid seal between the respective post 304, 306 and the recess 308a, 308b when the tank lid 288 is placed on the tank shell 286.

[0303] A fastening element 312 is arranged on the first post 304 and the second post 306, which, when the tank lid 288 is fixed to the tank shell, passes through the corresponding recess 308a, 308b.

[0304] The fastening elements 312 serve to fix the dirt fluid tank 38 to the cleaning fluid tank 40, which has corresponding counter elements for the fastening elements 312.

[0305] In particular, a suspended fixing of the dirt fluid tank 38 to the cleaning fluid tank 40 is provided.

[0306] A sliding guide is implemented via the fastening elements 312. The dirt fluid tank 38 can be moved in a sliding direction 314 ( Figure 4 ) insert or remove the cleaning fluid from the cleaning fluid tank 40. The sliding direction 314 is oriented parallel to the main travel direction 24 and is in particular oriented transversely (and preferably perpendicularly) to the axis of rotation 94.

[0307] The sliding direction 314 is still oriented transversely and in particular perpendicularly to the insertion / removal direction 124 for the cassette 98.

[0308] Furthermore, a locking device 316 is provided, by which the dirt fluid tank 38 can be locked to the cleaning fluid tank 40 when fixed via the fastening elements 312 and can be locked in particular with respect to the sliding direction 314.

[0309] The locking device 316 comprises (at least) a locking pawl 318, which is coupled to a release button 320.

[0310] The release button 320 is arranged, in particular, centrally on the tank lid 288. Furthermore, it is arranged, in particular, above a channel 322, through which dirt fluid from the at least one cleaning roller 28 can be coupled via the channel 386 of the scraper element 178 into the receiving chamber 294 of the dirt fluid tank 38.

[0311] With respect to the vertical direction 52 (when the dirt fluid tank 38 is located at the bottom head 12), the extraction button 320 and the locking pawl 318 are arranged above and, in particular, directly above the channel 322.

[0312] The tank shell 286 has a raised rim 324, which follows the course of the second area 298 of the wall 292 and is formed in particular by the wall 292.

[0313] The raised rim 324 is designed so that it extends beyond the uppermost point of the tank cap 288 when the latter is in contact with the tank tray 286, and in particular extends beyond the release button 320.

[0314] The raised rim 324 forms a stop element when inserting the dirt fluid tank 38 onto the cleaning fluid tank 40 in the sliding direction 314 (compare, for example, Figure 4 ).

[0315] A corresponding counter-element 326 is arranged on the cleaning fluid tank 40, which is recessed, in particular, on one outer side. When the tank combination 36 is fixed to the base 12, with the dirty fluid tank 38 being fixed to the cleaning fluid tank 40, a continuous and, in particular, edge-free transition results on the corresponding wall both between the cleaning fluid tank 40 and the dirty fluid tank 38, and between the tank combination 36 and the base 12.

[0316] In the illustrated embodiment, a recess 328 is arranged or formed on the cleaning fluid tank 40, which is associated with the release button 320 and is positioned so that an operator can access the release button 320 through the recess 328 (compare Figure 1 ).

[0317] With the tank combination 36 fixed to the base head 12, the tank combination 36 can be removed as a whole, i.e. as a combination of dirt fluid tank 38 and cleaning fluid tank 40, by accessing the locking device 278 accordingly (compare Figure 5 ).

[0318] However, the dirt fluid tank 38 can also be removed individually from the base head 12 and the cleaning fluid tank 40 by accessing the release button 320 accordingly, with the cleaning fluid tank 40 remaining attached to the base head 12 (compare Figure 4 ).

[0319] The removal or insertion of the cassette 98 at the base head 12 is independent of the "status" of the tank combination 36 or the individual tanks 38 and 40 with respect to the base head 12. The cassette 98 can be removed or inserted whether the tank combination 36 is fixed to or detached from the base head 12. The cassette 98 can be inserted or removed from the base head 12 whether the dirt fluid tank 38 is held in relation to the base head 12 or not.

[0320] A circumferential sealing device 330 is provided between the tank lid 288 and the tank shell 286. This sealing device 330 is arranged on the tank shell 286 and / or the tank lid 288. In the case of the Figure 28 In the illustrated embodiment, it is arranged on the tank lid 288.

[0321] A system 332 for the tank lid 288 is positioned on the tank shell 286, which provides support downwards, i.e. towards the tank bottom 290.

[0322] In the illustrated embodiment, the tank lid 288 as a whole is detachable from and removable from the tank shell 286.

[0323] The tank cap 288 has an opening 334 with a closure 336. The opening 334 can be closed using the closure 336.

[0324] With the closure 336 open, the dirt fluid tank 38 can be emptied of dirt fluid via the opening 334.

[0325] For example, for a more thorough cleaning of the dirt fluid tank 38, the tank lid 288 is removed from the tank tray 286.

[0326] The opening 334 is positioned between, for example, the recess 308b and an outer surface 338 of the tank lid 288 and, in particular, spaced apart from the channel 322 and spaced apart from the locking pawl 318 or the release button 320.

[0327] The channel 322 on the tank lid 288 has an inlet opening 340 and an outlet opening 342. The channel 322 is closed except for the inlet opening 340 and the outlet opening 342. The inlet opening 340 serves to connect to the scraper element 178 with its outlet opening 190. The outlet opening 342 of the channel 322 serves to introduce dirt fluid into the tank shell 286 and, in particular, into the receiving chamber 294 of the tank shell 286.

[0328] Channel 322 has a channel wall 344 with a channel floor 346 and an opposite channel ceiling 348.

[0329] Channel 322 is positioned at a central area 350 of the tank lid 288 relative to opposite lateral sides 352a, 352b. The tank lid 288 has a lateral direction 354 between these opposite lateral sides 352a, 352b, wherein, with the dirt fluid tank 38 fixed to the bottom head 12, this lateral direction 354 is parallel to the axis of rotation 94. It is also transverse and, in particular, perpendicular to the main direction of travel 24. It is also parallel to the first chord 66 and the second chord 68.

[0330] With respect to the lateral direction 354, the inlet opening 340 and the outlet opening 342 are arranged offset from each other, that is, they have a distance in the lateral direction 354.

[0331] Channel 322 has a longitudinal extension direction 356 with respect to a central axis ( Figure 30With respect to this longitudinal direction 356, the channel 322 lies at an acute angle 358 to the lateral direction 354 (compare Figure 30 With respect to the lateral direction 340, the inlet opening 340 is closer to the lateral side 352b than the outlet opening 342. The outlet opening 342 is closer to the lateral side 352a than the inlet opening 340.

[0332] The acute angle 358 lies in the range between 15° and 75°. In particular, the acute angle 358 is greater than or equal to 30°. Furthermore, it is specifically provided that the acute angle 358 is less than or equal to 60°. In a specific embodiment, the acute angle 358 is approximately 45°.

[0333] The inlet 340 has a first outlet standard 360. The outlet 342 has a second outlet standard 362.

[0334] When dirty fluid flows into the channel 322 at the inlet opening 340, a main flow direction 364 is at least approximately parallel to the first opening normal 360.

[0335] When dirty fluid flows out of the outlet 342 in channel 322 into the receiving chamber 294, the corresponding main flow direction is 366 ( Figure 30 ) at least approximately parallel to the second estuary standard 362.

[0336] The first mouth standard 360 and the second mouth standard 362 are geometric dimensions of the inlet mouth 340 and the outlet mouth 342, respectively.

[0337] The first outlet standard 360 and the second outlet standard 362 are oriented transversely and, for example, perpendicularly to each other. The outlet opening 342 points towards the tank bottom 290 and is accordingly oriented transversely and, in particular, perpendicularly to the tank bottom 290 with its second outlet standard 362.

[0338] The first muzzle normal 360 is oriented at least approximately parallel to the tank bottom 290. It can also be oriented at a small acute angle, in particular less than 45°, to the tank bottom 290.

[0339] The first outlet normal 360 and the second outlet normal 362 are each oriented transversely and, in particular, perpendicularly to the axis of rotation 94 when the dirt fluid tank 38 is held at the bottom head 12. They are then also oriented transversely and, in particular, perpendicularly to the first chord 66 and the second side 68, respectively.

[0340] In particular, the first muzzle normal 360 lies at an obtuse angle 368 (compare Figure 30 ) to the longitudinal extension direction 356 of the channel 322. The obtuse angle is, for example, on the order of 135°.

[0341] The second mouth normal 362 lies transversely and approximately perpendicular to the longitudinal extension direction 356 of the canal 320.

[0342] In one embodiment, the channel floor 346 is inclined at an acute angle 370 to the installation plane 26. The acute angle 370 is small and is, for example, on the order of 10° or 20°. In particular, the angle of the second outlet normal 362 to the longitudinal direction 356 differs from the 90° angle by the amount of the acute angle 370.

[0343] The inclination of the channel floor 346 at the acute angle 370 relative to the installation plane 26 towards the outlet opening 342 provides gravitational support for the transport of dirty fluid from the inlet opening 340 to the outlet opening 352.

[0344] Channel 322 is arranged such that, due to the acute angle 358 in the lateral direction 354, the dirty fluid is directed laterally. Due to the acute angle 370, dirty fluid is also directed downwards in channel 322.

[0345] In the area of ​​the inlet 340, the canal has a wall 372 on its channel bottom 346, which is located upstream of the inlet 340. This forms a channel basin 374 in the area of ​​the inlet 340.

[0346] In the area of ​​the channel basin 374, the scraper element 178 with its outlet opening 190 is connected to the dirt fluid tank 38 and thus to the tank lid 288. The drip edge 226 is located above the channel basin 374. The wall 372 prevents dirt fluid from flowing towards the cleaning roller 28 (see Figure 21 ).

[0347] A liquid level sensor device 376 is arranged on the dirty fluid tank 38. This device comprises one or more, and in particular two, liquid level sensors 378. These are arranged, in particular, on the tank lid 288 (see Figure 3). Figure 30 ).

[0348] They are arranged and designed to detect when a specific liquid level is reached. This specific liquid level is specifically aligned with a bottom surface of channel 322 on a corresponding outer surface of the channel floor 346 (compare Figure 30 ).

[0349] The liquid level sensors 378 are arranged particularly in the area of ​​the lateral side 352a when the closure 336 is arranged near the lateral side 352b.

[0350] In one embodiment, the liquid level sensor device 376 also forms a presence sensor, by which the control device of the floor cleaning device 10 can detect whether the dirt fluid tank 38 is inserted on the floor head 12 or not.

[0351] For example, a first contact 379a is assigned to a liquid level sensor, which is positioned in particular on the top of the tank cap 288 ( Figure 29 ). This first contact 379a is in direct electrically effective contact with a corresponding electrode of the associated liquid level sensor 378 and also forms a connection for the liquid level measurement.

[0352] A second contact 379b is also provided on the top of the tank cap 288. This is electrically connected to the first contact 379a. In particular, an electrical contact strip is arranged on the tank cap 288 between the first contact 379a and 379b.

[0353] Electrically isolated mating contacts are assigned to the base head 12 for the first contact 379a and the second contact 379b. These are, for example, arranged on the cleaning fluid tank 40 and thus electrically connected to the control unit, or can be arranged bypassing the cleaning fluid tank 40 in such a way that an electrical connection to the control unit exists.

[0354] If the dirt fluid tank 38 is not fixed to the base 12, then the corresponding mating contacts are not electrically connected. If the dirt fluid tank 40 is attached to the base 12, then a current, or in particular a short-circuit current, can flow through the contacts 379a and 379b. This current is detectable, and thus the presence of the dirt fluid tank 38 at the base 12 can be detected by means of the liquid level sensor 376.

[0355] As from Figure 32As can be seen, the inlet opening 340 has a boundary line 380 perpendicular to the latitude 354. A corresponding boundary line 382 of the outlet opening 342, which is also perpendicular to the latitude 354, is spaced apart from the boundary line 380. In the latitude 354, the inlet opening 340 and the outlet opening 342 are offset from each other.

[0356] In the Figures 33 to 35 Different views of the dirt fluid tank 38 with liquid filling 384 are indicated. It is possible to fill the dirt fluid to below the channel bottom 346 or to the underside of the liquid level sensors 378. Due to the channel 322 with its inclined arrangement, a sufficiently high storage volume for the receiving chamber 294 is achieved in all positions of the tank. This will be shown below using the Figures 36 to 38 explained.

[0357] In Figure 32A coordinate system with X and Y axes and a Z axis perpendicular to the drawing plane is drawn.

[0358] In Figure 36(a) A condition is shown in which the dirt fluid tank 38 is not aligned parallel to the Y-direction with respect to the lateral direction 154. The fluid 384 concentrates on one side. Here, too, a high intake volume results because, due to the inclined arrangement of the channel with respect to the longitudinal direction 356, it cannot drain out, particularly because the outlet opening 342 is not reached.

[0359] In the case of an opposing position according to Figure 36(b) Leakage is also effectively prevented because the outlet opening 342 is offset in the lateral direction 354 from the inlet opening 340.

[0360] In the Figures 37(a) and (b) A fluid volume of 384 is indicated when the X-axis is inclined according to Figure 32This applies to installation level 26. Here too, for the reasons mentioned, good leak protection is achieved.

[0361] In Figure 38 A liquid level 384 is indicated on the underside of the tank cap 288, which is the maximum level. The channel bottom 346 is then reached, the liquid level sensors 378 respond accordingly, and a warning message is generated.

[0362] In the possible positions of the liquid tank 38, despite a sufficiently high intake volume, the outflow of dirty fluid from the channel 322 "backwards" is effectively prevented due to the corresponding position of the channel 322.

[0363] The floor cleaning device 10 was described as a self-propelled and self-steering floor cleaning device 10.

[0364] Aspects of the invention, in particular relating to the cassette 98, the design of the dirt fluid tank 38 with the channel 322 on the tank lid 288 and the design of the scraper element 178, can be implemented alone or in combination in a hand-held floor cleaning device 386 ( Figure 39 ) are used. This includes a floor head 388 to which a rod device 390 is articulated. The rod device 390 serves to guide the floor head 388 over a floor to be cleaned, with an operator standing on the floor and performing the guidance via the rod device 390 while standing.

[0365] The bottom head 388 is equipped with a cassette corresponding to cassette 98.

[0366] It is alternatively or additionally equipped with a dirt fluid tank corresponding to the dirt fluid tank 38 with channel 322.

[0367] A scraper element corresponding to scraper element 178 may be provided.

[0368] In principle, a drive mechanism for the floor head 288 can be provided, or the floor head 388 can be driven by the cleaning roller 28 as it rotates around the axis of rotation 94.

[0369] In connection with the figures, embodiments were described in which a single cassette 98 is provided which holds a single cleaning roller 28.

[0370] It is also possible that one cassette, like cassette 98, holds several cleaning rollers and, for example, two cleaning rollers.

[0371] It is also possible that a plurality of cassettes corresponding to cassette 98 are provided on a corresponding floor head of the floor cleaning device, with each cassette 98 then holding one or more cleaning rollers. With a plurality of cassettes, the cassettes can be directly adjacent, or the cassettes can be spaced apart, with a dirt fluid tank being located, in particular, between spaced cassettes.

[0372] Furthermore, the floor cleaning device, as described in the drawings, features a cleaning roller with a wet-mopping function. It is also possible, however, for a cassette to be equipped with a cleaning roller that only performs a sweeping function and, in particular, has bristles. In this case, the floor cleaning device can be designed purely as a sweeper, and a cleaning fluid tank is not necessary.

[0373] It is also possible that the floor cleaning device has its own cleaning roller with a sweeping function, and a cleaning roller with a wet mopping function. Reference symbol list

[0374] 10 Floor cleaning device 12 Floor head 14 Chassis 16 Floor to be cleaned 18 Wheels 18a Wheel 18b Wheel 19 Wheel axle 20 Support roller 21 Pivot axis 22 Axle 24 Main direction of travel 26 Setup level 28 Cleaning roller 30 Navigation device 32 Front end 34 Rear end 36 Tank combination 38 Dirty fluid tank 40 Cleaning fluid tank 42 Underside 44 Top side 46 Wall 48 Impact body 50 Center 52 Vertical direction 54 Cliff sensor 56 Battery compartment 58 Cover 60 Sensor 62 Charging contact 64 Outer contour 66 First chord 68 Second chord 70 Collection chute 72 Longitudinal direction 74 Cover wall 76 Wall 78 Wall 80 Opening 82 First lateral side 84 Second lateral side 86 Side wall 88 Opening 90 Drive motor 92 Drive shaft 94 Rotation axis 96 First pivot bearing 98 Cassette 100 Cover 102 Locking device 104 Release button 106 Counter element 108 Second pivot bearing 110 Support structure 112 Wall 114 Longitudinal direction 116 Guide device 118 Counter guide device 120 Grooves 122 Strip 124 Insertion / removal direction126 Holding device 128 First holding element 130 Second holding element 132 Ring element 134 Opening 136 Carrier 138 Cleaning medium (bristle) 140 Opening 142 First immersion element 144 Support element 146 First part 148 Second part 150 Second immersion element 152 Interior 154 Direction of movement 156 Spring device 158 Receptacle 160 Positive locking device 162 Receptacle element 164 Immersion opening 166 Immersion element 168 Distributor device 170 Distributor channel 172 Channel wall 174 Opening 176 Connection 178 Scraper element 180 Guide device 182 Body 184 Channel device 186 Channel 188 Inlet opening 190 Outlet opening 192 Swivel axis 194 First shaft stub 196 Second shaft stub 198a First hook element 198b Second hook element 200 Wiper strip 202 Underside 204 Topside 206 Support area 208 Spring device 210 Support element 212 Slanted surface 214 Lateral direction 216 First width 218 Second width 220 Middle plane 222 Triangular shape 224 Triangular tip 226 Drip edge 228 First area 230 Second area 231 Fork point232 Obtuse angle 234 Acute angle 236 Third area 238 Impact surface 240 Channel ceiling 242 Channel floor 244 Acute angle 246 Hair comb device 248 Pin 250 Direction of rotation 252 Sweeping device 252' Sweeping device 252" Sweeping device 254 Sweeping edge 256 Teeth 258 Underside 260 Guide surface 262 Spacing 264 Spacing 266 Tooth 268 Area 270 Center axis 272 Receptacle 274 Tab 276 Sliding guide 278 Locking device 280 Top side 282 Opening 284 Closing element 286 Tank tray 288 Tank lid 290 Tank bottom 292 Wall 294 Receiving space 296 First area 298 Second area 300 Intake 302 Roller 304 First post 306 Second post 308a Recess 308b Recess 310 Seal 312 Fastening element 314 Sliding device 316 Locking device 318 Locking pawl 320 Release button 322 Channel 324 Raised edge 326 Counter element 328 Recess 330 Sealing device 332 Attachment 334 Opening 336 Closure 338 Outside 340 Inlet opening 342 Outlet opening 344 Channel wall 346 Channel floor 348 Channel ceiling 350 Middle area352a Lateral side 352b Lateral side 354 Broad direction 356 Longitudinal direction 358 Acute angle 360 ​​First outlet normal 362 Second outlet normal 364 Main flow direction 366 Main flow direction 368 Obtuse angle 370 Acute angle 372 Wall 374 Channel basin 376 Fluid level sensor device 378 Fluid level sensor 379a First electrical contact 379b Second electrical contact 380 Boundary line 382 Boundary line 384 Fluid 386 Bottom cleaning device 388 Bottom head 390 Rod device

Claims

1. Floor cleaning device comprising a floor head (12; 388) and at least one cleaning roller (28) which rotates about a rotation axis (94) during operation of the floor cleaning device, characterized by the fact that at least one scraper element (178) with at least one scraper strip (200) is provided, wherein the at least one scraper strip (200) serves to scrape dirt fluid from the at least one cleaning roller (28), that a channel device (184) with an inlet opening (188) and an outlet opening (190) is arranged on the at least one scraper element (178), wherein the inlet opening (188) faces the at least one cleaning roller (28) and the outlet opening (190) leads to a dirt fluid tank (38), and that the inlet opening (188) of the channel device (184) has a larger maximum width in a lateral direction (214) parallel to the axis of rotation (94) than the outlet opening (190) of the channel device (184).

2. Floor cleaning device according to claim 1, characterized by the fact that The channel system (184) between the inlet (188) and the outlet (190) is funnel-shaped, at least with respect to the width direction (214).

3. Floor cleaning device according to claim 1 or 2, characterized byat least one of the following: - the channel assembly (184) comprises exactly one channel (186) with the inlet opening (188) and the outlet opening (190); - the maximum width (216) of the inlet opening (188) in the lateral direction (214) is at least three times greater than the maximum width (218) of the outlet opening (190); - the inlet opening (188) has a greater maximum height in a vertical direction transverse to the lateral direction (214) than the outlet opening (190); - the inlet opening (188) is arranged and / or formed in a mirror-symmetrical manner with respect to a median plane (220) of the at least one scraper element (178); - the outlet opening (190) is arranged and / or formed in a mirror-symmetrical manner with respect to a mirror plane of the at least one scraper element (178);- the channel device (184) is arranged and / or formed in a mirror-symmetrical manner with respect to a central plane (220) of the at least one scraper element (178); - the outlet opening (190) is arranged centrally on the at least one scraper element (178) in the width direction (214) and with respect to the inlet opening (188).

4. Floor cleaning device according to one of claims 1 to 3, characterized by the fact that the outlet opening (190) has a triangular shape, in particular with at least one of the following: - a drip edge (226) is assigned to the outlet opening (190); - a triangular apex (224) of the triangular shape is arranged centrally on the at least one scraper element (178) with respect to the width direction (214) and is assigned to a mounting plane (26) of the floor cleaning device.

5. Floor cleaning device according to one of claims 1 to 4, characterized by the fact thatthe inlet opening (188) is limited by at least one scraper bar (200) in the direction of an installation level (26) of the floor cleaning device.

6. Floor cleaning device according to one of claims 1 to 5, characterized by the fact that the at least one scraper strip (200) having a first region (228) and a second region (230), wherein the first region (228) and the second region (230) are at an angle to each other and / or to the width direction (214), in particular with at least one of the following: - the first region (228) and / or the second region (230) have a straight extension; - the first region (228) and the second region (230) are at an obtuse angle (232) to each other; - the first region (228) and the second region (230) are each at an acute angle (234) and in particular at an acute angle (234) of the same magnitude to the width direction (214), and in particular characterized by the fact thatBetween the first area (228) and the second area (230) of the at least one scraper strip (200) lies a third area (236) which is connected to the first area (228) and the second area (230), in particular to at least one of the following: - the third area (236) has a straight extension; - the third area (236) lies parallel to the width direction (214); - the third area (236) is mirror-symmetrical to the first area (228) and the second area (230); - the third area (236) has a shorter length than the first area (228) and the second area (230).

7. Floor cleaning device according to one of the preceding claims, characterized byat least one of the following: - exactly one scraper element (178) is assigned to a cleaning roller (28); - the at least one cleaning roller (28) has a covering (138) and in particular a textile covering, and the at least one scraper bar (200) rests against the covering or projects into the covering (138) during operation of the floor cleaning device; - the at least one scraper bar (200) defines an inlet opening (188) for cleaning fluid on the at least one scraper element (178); - with respect to a vertical axis (52) of the floor cleaning device, the at least one scraper bar (200) defines an inlet opening (188) on the at least one scraper element (178) downwards towards a mounting plane (26) of the floor cleaning device, and in particular only downwards;- the at least one scraper element (178) is arranged in the operation of the floor cleaning device above a central axis (270) of the at least one cleaning roller (28) with respect to a height axis (52) of the floor cleaning device and a mounting plane (26) of the floor cleaning device; - the conveyance of dirt fluid from the at least one cleaning roller (28) to a dirt fluid tank (38) with scraping of dirt fluid from the at least one cleaning roller (28) by the at least one scraper bar (200) takes place according to the overflow principle; - the at least one scraper bar (200) is arranged on one side at an inlet opening (188) of a channel device (184) of the at least one scraper element (178).

8. Floor cleaning device according to one of the preceding claims, characterized by the fact thatIn the operation of the floor cleaning device, the at least one cleaning roller (28) rotates in a direction of rotation (250) such that at an inlet opening (188) of the at least one scraper element (178) the flow direction for dirt fluid from the inlet opening (188) into at least one channel (186) of the at least one scraper element (178) is in the same direction as the direction of rotation (250), and in particular characterized by the fact thatThe pivot bearing has a plurality of spaced-apart shaft stubs (194; 196) to which one or more counter elements (198a; 198b) are assigned, in particular with at least one of the following: - the shaft stubs (194; 196) are arranged on the at least one wiper element (178) or on the holding device (126) and the counter element(s) (198a; 198b) are arranged on the holding device (126) or the at least one wiper element (178); - the counter element(s) (198a; 198b) for the shaft stubs (194; 196) are designed as receiving hooks, wherein the shaft stubs (194; 196) are removable from the counter element(s) (198a; 198b) and thereby the at least one wiper element (178) is removable from the holding device (126); - at least two wave stubs (194; 196) are provided and in particular each wave stub (194; 196) is assigned its own counter element (198a; 198b).

9. Floor cleaning device according to one of the preceding claims, characterized by the fact that a channel floor (242) of the at least one channel (186) is inclined at an acute angle (244) towards an outlet opening (190) relative to a mounting plane (26) of the floor cleaning device, and / or that a baffle surface (238) for dirt particles is arranged on a channel ceiling (240) of the at least one channel (186), which directs dirt particles towards an outlet opening (190).

10. Floor cleaning device according to one of the preceding claims, characterized by the fact thatAn inlet opening (188) of the channel device (184) of the at least one scraper element (178) has an upper boundary relative to a height axis (52) of the floor cleaning device and has a lower boundary spaced apart from the upper boundary, wherein the at least one scraper bar (200) is arranged at the lower boundary and / or forms the lower boundary, and wherein, during operation of the floor cleaning device, the at least one cleaning roller (28) rotates in a direction (250) from the upper boundary to the lower boundary, and wherein, in particular, a region of the at least one cleaning roller (28) is supplied with cleaning fluid, which then rotates towards the inlet opening (188).

11. Floor cleaning device according to one of the preceding claims, characterized by the fact thatthe at least one scraper bar (200) extends at least over an entire effective cleaning length of the at least one cleaning roller (28) and in particular extends outwards beyond the effective cleaning length.

12. Floor cleaning device according to one of the preceding claims, characterized by at least one of the following: - a hair comb device (246) is arranged on the at least one scraper element (178); - a hair comb device (246) is arranged downstream of the at least one scraper bar (200) on the at least one scraper element (178) with respect to a direction of rotation (250) of the at least one cleaning roller (28).

13. Floor cleaning device according to one of the preceding claims, characterized bya design as a self-propelled and self-steering floor cleaning device (10), in particular with a chassis (14) on which a drive system for the floor cleaning device (10) and a navigation device (30) for the floor cleaning device (10) are arranged.

14. Floor cleaning device according to one of claims 1 to 12, characterized by a rod device (300) which is arranged on the floor head (388), wherein the floor cleaning device (386) can be guided by a standing operator over a floor (16) to be cleaned.

15. Floor cleaning device according to one of the preceding claims, characterized by the fact thatat least one cassette (98) with the holding device (126) is detachably mounted on the bottom head (12; 388), wherein in particular the holding device (126) has at least two spaced-apart stops for the at least one cleaning roller (28), by which the at least one cleaning roller (28) is detachably held on the cassette (98) when the cassette (98) has been removed from the bottom head (12; 388), and that when the cassette (98) is arranged on the bottom head (12; 388) the at least one cleaning roller (28) is torque-effectively coupled to a drive shaft (92).

16. Floor cleaning device according to claim 15, characterized by the fact thatThe floor head (12; 388) has a receiving shaft (70) for the at least one cassette (98), in particular with at least one of the following: - the receiving shaft (70) has a longitudinal extension direction (72) which is parallel to the axis of rotation (94); - a longitudinal extension direction (72) of the receiving shaft (70) lies transversely and in particular perpendicular to a main travel direction (24) of the floor cleaning device; - the receiving shaft (70) is open to a bottom side of the floor head (12; 388); - the receiving shaft (70) is closed to a top (44) of the floor head (12; 388) by a cover wall (74); - the lid wall (74) is part of the bottom head (12; 388) and / or is part of a tank which is held on the bottom head (12; 388) and / or is a boundary wall (74) of a receptacle (272) for at least a part (274) of a tank (40) and in particular cleaning fluid tanks (40);- the receiving shaft (70) is closed on a first lateral side (82) by a side wall (96) and open on an opposite second lateral side (84); - on the second lateral side (84) an insertion opening (88) for the cassette (98) into the receiving shaft (70) is formed; - on a side wall (86) by which the receiving shaft (70) is closed on a first lateral side (82), the at least one drive shaft (92) and in particular at least partially the drive motor (90) or a torque transmission device from the drive motor (90) to the at least one drive shaft (92) is located; - the bottom head (12; 388) has a front end (32) and a rear end (34) with respect to a main direction of travel (24) and the receiving shaft (70) is open towards the rear end (34) and in particular towards the front end (32) is limited by a transverse wall (76);- the at least one cassette (98) is positioned on the floor head (12; 388) closer to the rear end (34) than to the front end (32); - the drive shaft (92) projects into the receiving chute (70); - an insertion direction (124) of the at least one cassette (98) into the receiving chute (70) is at least approximately parallel to the axis of rotation (94); - an removal direction (124) of the at least one cassette (98) from the receiving chute (70) is at least approximately parallel to the axis of rotation (94); - an insertion / removal direction (124) of the at least one cassette (98) at the receiving chute (70) is transverse and, in particular, perpendicular to a main travel direction (24) of the floor cleaning device.

17. Floor cleaning device according to claim 15 or 16, characterized by the fact thata guide device (116) for sliding the at least one cassette (98) is arranged on the receiving shaft (70) and the at least one cassette (98) has a counter-guiding device (118) which is adapted to the guide device (116) on the receiving shaft (70), in particular with at least one of the following: - the guide device (116) and counter-guiding device (118) are designed as sliding guide devices (118); - a guide direction on the guide device (116) is at least approximately parallel to the axis of rotation (94).

18. Floor cleaning device according to one of claims 15 to 17, characterized by the fact thatThe holding device (126) on the at least one cassette (98) has a first holding element (128) with a first stop and a second holding element (130) with a second stop, wherein the first stop and the second stop are spaced apart from each other in a longitudinal direction (114) of the at least one cassette (98), and wherein, in particular, in the case of a cassette (98) arranged on the bottom head (12; 388), the longitudinal direction (114) of the at least one cassette (98) is at least approximately parallel to the axis of rotation (94), and in particular characterized byat least one of the following: - during operation of the floor cleaning device, when at least one cleaning roller (28) is rotating, the at least one cleaning roller (28) is rotatably mounted on the first retaining element (128); - when at least one cassette (98) is arranged on the floor head, the second retaining element (130) is located closer to the at least one drive shaft (92) than the first retaining element (128); - the first retaining element (128) includes a pivot bearing (108) for the at least one cleaning roller (28); - the first retaining element (128) is arranged on a cover (100) of the at least one cassette (98), which, when at least one cassette (98) is located on the floor head (12; 388), closes a receiving chute (70) for the at least one cassette (98);- the first retaining element (128) has a first immersion element (142) for immersion in a first recess (140) of the at least one cleaning roller (28), wherein in particular the first immersion element (142) and the first recess (140) are adapted to each other in such a way that the first immersion element (142) has a rotationally fixed coupling with the at least one cleaning roller (28) and the first retaining element (128) and the first immersion element (122) is rotatable relative to the at least one cassette (98).

19. Floor cleaning device according to one of the preceding claims, characterized by a spring device (208) with at least one spring which, when at least one cleaning roller (28) is fixed to the bottom head (12; 388), acts on the at least one scraper element (178) and presses the at least one scraper element (178) against the at least one cleaning roller (28), and in particular characterized byat least one of the following: - a spring force of the spring assembly (208) acts transversely to the axis of rotation (94); - the spring assembly (208) is fixedly arranged on the bottom head (12; 388) and is supported on the at least one scraper element (178), in particular with at least one of the following: - the spring assembly (208) is loosely supported on the at least one scraper element (178); - when the retaining device (126) is removed from the bottom head (12; 388), the spring assembly (208) remains on the bottom head (12; 388); - the spring assembly (208) is arranged on a wall (78) of a receiving shaft (70) of the bottom head (12; 388) for the at least one cleaning roller (28); - the wall (78) with the spring device (208) is adjacent to a dirt fluid tank (38), which is located on the bottom head (12; 388);- the wall (78) forms a wall of a receptacle (272) for a partial area of ​​a tank (40), wherein the tank (40) is in particular a cleaning fluid tank (40); - the spring device (208) is located on an end face of the wall (78); - a spring force of the spring device (208) acts parallel to a vertical axis (52) of the floor cleaning device; - the floor head (12; 388) has a front end (32) and a rear end (34) with respect to a main direction of travel (24), and the wall (78) is located closer to the rear end (34) than to the front end (32); - the spring device (208) is supported on a wall of a channel device (184) of the at least one scraper element (178), wherein during operation of the floor cleaning device dirt fluid is conveyed through the channel device (184) from the at least one cleaning roller (28) to a dirt fluid tank (38);- the spring assembly (208) has a plurality of spaced support elements (210) for the at least one scraper element (178), wherein one support element (210) has an inclined surface (212) as an insertion aid for the holding device (126).

20. Floor cleaning device according to one of the preceding claims, characterized by the fact thatthe at least one scraper element (178) is pivotably mounted on the holding device (126) about a pivot axis (192) at a pivot bearing, in particular with at least one of the following: - the pivot axis (192) is oriented parallel to the axis of rotation (94); - the pivot axis (192) is oriented transversely and in particular perpendicular to a main direction of travel (24) of the floor cleaning device; - the at least one scraper element (178) is foldable away from the at least one cleaning roller (28) at the pivot bearing, in order in particular to be able to remove the at least one cleaning roller (28) from the holding device (126) and / or to be able to clean the at least one scraper element (178).

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