Cleaning head for a cleaning machine, cleaning machine, and method for operating a cleaning machine

Abstract

A cleaning head (12) for a cleaning machine is provided, comprising a holding means (68) via which the cleaning head (12) is held on the cleaning machine, a disc holder (70) which holds or comprises a cleaning tool (71) which is mounted movably on the holding means (68) and is moved in a driven manner during a cleaning operation, and a supply device (66) for cleaning liquid, wherein the supply device (66) for cleaning liquid has a distributor (180) having at least one first outlet (184) and a second outlet (188), wherein the first outlet (184) is fluidically connected to a channel (136) on the disc holder (70), wherein the second outlet (188) is fluidically connected to a central region (148) of the disc holder (70), and wherein the channel (136) is radially spaced apart from the central region (148) and is fluidically separated from the central region (148).

Description

[0001] Cleaning head for a cleaning machine, cleaning machine and method for operating a cleaning machine

[0002] The invention relates to a cleaning head for a cleaning machine, comprising a holder by which the cleaning head is held on the cleaning machine, a drive plate which holds or comprises a cleaning tool which is movably mounted on the holder and is driven to move during a cleaning process, and a supply device for cleaning fluid.

[0003] The invention further relates to a cleaning machine comprising a device body and a cleaning head.

[0004] Furthermore, the invention relates to a method for operating a cleaning machine which has a drive plate with a cleaning tool, wherein the drive plate is driven in an orbital motion, in which cleaning fluid is supplied to the drive plate.

[0005] GB 789,223 discloses a cleaning machine with a tool which has a circular disc provided with openings.

[0006] GB 2 501 772 A discloses a locking mechanism for use in controlling the inclination of a floor brush assembly in a floor scrubber.

[0007] US 9,649,003 B2 discloses a "random orbit scrubber" comprising a cleaning head device with a motor that imparts a rotary and orbital motion to a cleaning element. A suction bar device is also provided. US 9,370,289 B2 discloses a floor cleaning machine.

[0008] US 4,881,288 reveals another floor cleaning machine.

[0009] The invention is based on the objective of providing a cleaning head of the type mentioned above, which enables an optimized distribution of cleaning fluid during a cleaning process.

[0010] This problem is solved in the cleaning head of the type mentioned at the outset according to the invention in that the supply device for cleaning fluid has a distributor with at least a first outlet and a second outlet, that the first outlet is fluidly connected to a channel on the drive plate, that the second outlet is fluidly connected to a central area of ​​the drive plate, and that the channel is radially spaced from the central area and fluidly separated from the central area.

[0011] In the solution according to the invention, cleaning fluid is dispensed in two ways: firstly, via the central area, and secondly, at a distance from the central area, via the trough. The distributor ensures a corresponding distribution of the cleaning fluid supplied to the cleaning head.

[0012] This results in an optimized application of cleaning fluid for a cleaning process on a surface to be cleaned, even with complex movement of the cleaning tool (the drive plate) and especially with rotary-orbital movement or movement with an eccentric component.

[0013] Such complex movements can cause problems when the cleaning fluid is applied solely to a central area. Furthermore, complex movements typically require components such as eccentrics and bearings to be positioned at or near the central area, which, due to their space requirements, generally interfere with the application of cleaning fluid in that area.

[0014] In the solution according to the invention, at least a portion of the cleaning fluid can be dispensed via the channel at a distance from the central area. Even with complex movements of the drive plate (the cleaning tool), this results in an optimized cleaning process, particularly for scrubbing and vacuuming.

[0015] In particular, cleaning fluid is applied directly to the surface to be cleaned via the central area and indirectly via the channel by means of a primary cleaning action on the cleaning tool.

[0016] A fluid-active connection means that a flow connection exists. Intermediate elements, such as a hose, can be arranged between the distributor and the outlet.

[0017] In particular, the channel which is fluidly connected to the first outlet is a first channel with at least one of the following: the first channel is arranged in a ring around the central area; the first channel has an annular shape; the first channel is radially spaced from a circumferential outer surface of the drive plate; the first channel is closer to a circumferential outer surface of the drive plate than to an edge of the central area; the first channel forms a closed ring; a first channel is movable relative to the holder.

[0018] If the groove is circular or has an annular shape and in particular forms a closed ring, this results in optimized application, especially to a cleaning tool.

[0019] The channel is formed on the drive plate. This allows it to move relative to the holder. The distributor is preferably fixed to the holder. Furthermore, it is advantageous if the first outlet is fixed to the holder. The movement of the channel, resulting from the movement of the drive plate relative to the holder, allows cleaning fluid to be easily coupled into and then out of the channel from above. A closed ring provides optimized coupling, while still allowing the drive plate and channel to move relative to the first outlet.

[0020] It is advantageous if the channel which is fluidly connected to the first outlet is a first channel with at least one of the following: the first channel has at least one and in particular a plurality of openings extending to an underside of the drive plate; at least one and in particular a plurality of uniformly spaced openings are arranged on a channel bottom of the first channel; cleaning fluid is applied directly to the cleaning tool via the first channel.

[0021] The cleaning tool can then be moistened directly via the first channel. This results in an optimized distribution of cleaning fluid. Problems that arise during the distribution of cleaning fluid due to the complex movement of the drive plate relative to the holder can at least be reduced by dispensing a portion of the cleaning fluid from the first channel at a distance from the central area.

[0022] It is advantageous if the channel directly connected to the first connection is a primary channel, and if this primary channel is equipped with a sealing device or splash guard. This prevents the "loss" of cleaning agent. The vast majority of the cleaning agent is applied precisely where it is needed, namely to the surface being cleaned. Specifically, it is applied directly via the central area and indirectly via the primary channel onto the first cleaning tool.

[0023] It is advantageous if at least one of the following is provided: the sealing device or splash guard is designed as a sealing lip or splash guard lip; the sealing device or splash guard is located on an end face of a wall of the first channel; the sealing device or splash guard is located on an outer wall of the first channel, which faces a circumferential outer surface of the drive plate.

[0024] By positioning it on the outer wall, the centrifugal force on the cleaning fluid is taken into account.

[0025] It is particularly advantageous if the holder or drive plate has a second channel that is fluidly connected to the second outlet of the distributor and also fluidly connected to the central area. This results in optimized cleaning agent distribution. The second channel effectively bypasses a holding or bearing area for the drive plate, thus enabling the supply of cleaning fluid to the central area.

[0026] In one embodiment, the second channel is mounted on a flange that accommodates a bearing assembly for the drive plate. The flange is specifically attached to the bracket. The flange can, for example, protect the bearing assembly from splashing water and the like. This results in a structurally simple design.

[0027] It is advantageous if at least one of the following is provided: the second channel surrounds the central area; the channel which is fluidly connected to the first outlet is a first channel and fluidly separates the second channel from the second channel; the first channel is radially spaced from the second channel; the second channel has a smaller diameter than the first channel; the second channel has an outlet device leading to the central area; at least one channel leads from the second channel to the central area; the second channel is arranged in an annular shape around the central area; the second channel has a circular shape; the second channel is radially spaced from a circumferential outer surface of the drive plate; the second channel forms a closed ring or part of a ring; the second channel surrounds a coupling area of ​​a drive motor to the drive plate; the second channel is immovable relative to the holder.

[0028] This results in a structurally simple design.

[0029] Cleaning fluid can be efficiently supplied to the central area via the second channel. This minimizes unwanted contact of liquid with storage equipment and the like.

[0030] It is advantageous if the second channel is assigned a sealing device with at least one of the following: the sealing device comprises at least one sealing lip; a first sealing lip is located on an outer wall of the second channel, which faces a circumferential outer surface of the drive plate; a second sealing lip is located on an inner wall of the second channel, which faces the central area; the sealing device is located on the end face of a wall of the second channel.

[0031] This results in effective liquid protection for the drive motor and the bearing assembly. It is particularly advantageous if the drive plate has a central opening to its underside. This allows for direct application of cleaning fluid to the surface to be cleaned ("primary wetting"). This ensures effective distribution of the cleaning fluid across the surface and reduces the risk of splashing. Furthermore, the required amount of cleaning fluid can be kept low. Additional application via the (first) channel is provided ("secondary wetting").

[0032] It is advantageous if at least one of the following is provided: the central opening is located on an extension of an axis for movement of the drive plate; the central opening has a larger area than an opening of the channel that is fluidly connected to the first connection; the cleaning tool has a central opening that is positioned above the central opening of the drive plate; a surface to be cleaned can be directly supplied with cleaning fluid via the central opening of the drive plate.

[0033] This allows for the efficient, central application of a precisely measured amount of cleaning fluid.

[0034] It is advantageous if at least one of the following is provided: the first outlet is assigned a first hose nipple which leads into the assigned channel; the second outlet is assigned a second hose nipple which leads into a second channel which is in fluid-effective communication with the central area.

[0035] Cleaning fluid can be easily poured into a channel from above via a hose nipple. For example, in the case of the first channel, cleaning fluid can also be introduced by moving the first channel towards the hose nipple.

[0036] It is particularly advantageous if the distributor splits the cleaning fluid between the first and second outlets. This allows for the benefit of centralized application with optimized water distribution. Furthermore, it reduces problems arising from complex movements of the drive plate, especially the superposition of rotational and orbital motion.

[0037] It can generally be stipulated that the division is fixed and, for example, is at least approximately 50:50.

[0038] In one embodiment, an adjustment device is provided on the distributor, by means of which the distribution can be adjusted, and in particular also by an operator of a cleaning machine. The adjustment device can also, in principle, be used to set a fixed variable distribution at the cleaning head.

[0039] It is particularly advantageous if the drive motor for the drive plate is mounted on the holder and, in particular, is part of the cleaning head. This results in a structurally simple design, even with complex movements of the drive plate, such as the superposition of rotation and orbital motion (in the case of movement with an eccentric component). It is also beneficial to have a splash guard attached to the opening in the holder through which the drive shaft of the drive motor passes. This provides optimized motor protection.

[0040] A good cleaning result is achieved when the drive plate rotates and is mounted and driven in an orbital motion. In addition to a rotational movement, an eccentric or vibrational component is then present.

[0041] For example, the drive plate is mounted on an eccentric shaft, which is driven in an orbital motion by the drive motor. Reference is made in this context to US 9,649,003 B2.

[0042] In principle, such eccentric movement can cause vibrations. These vibrations can be reduced if a counterweight is attached to the eccentric shaft.

[0043] In an advantageous embodiment, the cleaning tool is a cleaning disc (pad) which is interchangeably held on the drive plate. This allows, for example, a tool change to be implemented in a simple manner.

[0044] Tool changes can be carried out easily if the drive plate has a hook plate for fixing the cleaning tool.

[0045] It is advantageous if the holder has a handle, particularly in the form of a grip. Such a handle allows, for example, easy tool changes, enabling the cleaning head to be moved into the appropriate tool-changing position.

[0046] Furthermore, it is advantageous if a bumper is attached to the holder. This is a self-flexing element and / or an elastically mounted element. Such a bumper prevents hard impacts with obstacles and thus avoids damage to these obstacles (and also to the cleaning head).

[0047] It is advantageous if the holder has at least one roller, and especially at least two rollers. Such rollers facilitate tool changes. They allow the cleaning head to be supported during a tool change.

[0048] Furthermore, it is advantageous if a centering device for the cleaning tool is arranged on the drive plate. This makes it easy to achieve a centered position of the cleaning tool on the drive plate.

[0049] The invention further aims to provide a cleaning machine of the type mentioned above in which a tool change process is made possible in a simple manner.

[0050] This problem is solved in the cleaning machine mentioned at the outset according to the invention by the fact that the cleaning head is mounted on the device body in a lockable pivotable manner, and that the cleaning head has at least one tool-changing pivot position in which the cleaning head is positioned for an outside of the device body and an underside of the drive plate is accessible to an operator.

[0051] The corresponding swivel position for tool changes provides good accessibility for the operator. They can then perform a tool change from the front of the cleaning head, rather than having to do it from below.

[0052] In particular, a cleaning operation swivel position of the cleaning head refers to at least one tool change swivel position with a swivel angle of at least 70° and especially at least 80°. The cleaning operation swivel position defines the 0° angle. This results in good accessibility for an operator, essentially from the front and not from below.

[0053] It is also advantageous if at least one of the following is provided: a pivot axis of the cleaning head's pivotability is parallel to a wheel axis; a pivot axis of the cleaning head's pivotability is transverse and, in particular, perpendicular to a forward direction of travel of the cleaning machine; the outside of the cleaning machine, in front of which the cleaning head is positioned in its at least one tool-change pivoting position, is a front of the device body with respect to a forward direction of travel of the cleaning machine.

[0054] This results in a simple design. A tool-changing swivel position can be easily implemented with reduced design effort.

[0055] Furthermore, it is advantageous if the device body has a recess in which the at least one cleaning head is positioned and can be pivoted relative to the device body. This allows, in particular, a sufficient swivel range to position the cleaning head in the at least one tool-changing swivel position.

[0056] For the same reason, it is advantageous to have a swivel bearing positioned at the recess to allow the cleaning head to pivot relative to the device body. Furthermore, it is beneficial if the cleaning head, in a swiveling position during cleaning, extends beyond the housing by at least a portion. This results in effective cleaning and also allows for some clearance underneath. Additionally, this facilitates the simple implementation of a swiveling position for tool changes.

[0057] In a structurally advantageous embodiment, a strip is arranged on the device body, with which the cleaning head can be fixed to define a swiveling position for cleaning operation. This allows for a simple locking of the cleaning head with respect to its swiveling movement relative to the device body.

[0058] Furthermore, it is advantageous if a handle is provided on the cleaning head for pulling it into at least one tool-change swivel position. This allows an operator to easily move the cleaning head from its cleaning operation swivel position to its tool-change swivel position by pulling it.

[0059] It is particularly advantageous if at least one roller is arranged on the cleaning head, especially with at least one of the following: in a cleaning operation, the at least one roller is spaced away from a surface to be cleaned; in the at least one tool-change swivel position, the cleaning head is supported by the at least one roller on a base on which the cleaning machine stands; when the cleaning head transitions into the at least one tool-change swivel position, the cleaning head is supported by the at least one roller on a base. This allows the cleaning head to be supported at least in the at least one tool-change swivel position. This results in a simple tool change.

[0060] Furthermore, it is advantageous if at least one of the following is provided: a suction bar device is arranged on the device body; a blower device for generating a suction flow is arranged on the device body, which is in fluid-effective communication with a suction bar device; a tank device for dirty fluid is located on the device body.

[0061] The suction bar system, which is in fluid-active connection with a blower system, allows a dirty solution to be extracted from the floor to be cleaned. This ensures optimized dirt removal and rapid drying.

[0062] Furthermore, it is advantageous if at least one of the following is provided: a tank device for cleaning fluid is attached to the device body; a device body supply device for cleaning fluid is attached to the device body, which is connected to the supply device for cleaning fluid of the cleaning head; a pump for conveying cleaning fluid to the cleaning head is attached to the device body.

[0063] This allows for an optimized supply of cleaning fluid to the cleaning head. In particular, the cleaning machine is self-propelled. It can be manually operated or, for example, designed as a ride-on machine. In principle, a self-propelled and self-steering design is also possible (a robotic cleaning machine).

[0064] Advantageously, the cleaning machine is a scrubber-dryer, whereby a scrubbing motion is performed on the surface to be cleaned via the cleaning head. Suction is achieved primarily through a suction bar device.

[0065] In one embodiment, an operating device is provided which is in signal-effective communication with an adjustment device on a distributor for cleaning fluid at the cleaning head. An operator can then, in particular, adjust how the cleaning fluid is to be distributed at the cleaning head, especially with regard to a central area and a trough.

[0066] The aforementioned problem of optimizing the distribution of cleaning fluid is further solved in a method according to the invention of the type mentioned above, wherein a distributor divides the cleaning fluid into a first part, which is supplied to a central area of ​​the drive plate, and into a second part, which is supplied to a trough that surrounds the central area and is fluidly separated from the central area.

[0067] The advantages of this method have already been described at the beginning in connection with the cleaning head according to the invention.

[0068] In particular, the inventive method can be carried out on a cleaning machine with a cleaning head according to the invention, or a cleaning machine with the inventive cleaning head can be operated using the inventive method. Specifically, cleaning fluid is applied directly to the surface to be cleaned via the central area, and cleaning fluid is fed directly to the cleaning tool via the channel.

[0069] The following description of preferred embodiments, in conjunction with the drawings, serves to further explain the invention. The drawings show:

[0070] Figure 1 shows a perspective view of an embodiment of a cleaning machine with a cleaning head according to the invention (which is in a cleaning swivel position);

[0071] Figure 2 shows a view of the cleaning head according to Figure 1 from below (in direction A) without cleaning tool;

[0072] Figure 3 shows an exploded view of the cleaning head according to Figure 1;

[0073] Figure 4 shows a top view of a drive plate of the cleaning head according to Figure 1;

[0074] Figure 5 shows a partial sectional view of the cleaning head according to Figure 1;

[0075] Figure 6 shows the cleaning machine according to Figure 1, wherein the cleaning head is in a tool-changing swivel position;

[0076] Figure 7 shows the same view as Figure 6 with the cleaning tool removed;

[0077] Figure 8 shows the cleaning head in the position shown in Figure 7 with the cleaning tool removed (without the hook plate); and Figure 9 shows the same view as Figure 8, but showing only the cleaning head.

[0078] An embodiment of a cleaning machine according to the invention, which is shown in Figure 1 and designated by 10, comprises an embodiment of a cleaning head 12 according to the invention.

[0079] The cleaning machine 10 is a scrubber-dryer.

[0080] It comprises a device body 14. The device body 14 is supported by a wheel device 16 in a manner that allows it to move against a base 17 (in particular a floor).

[0081] In one embodiment, the wheel assembly 16 is driven by a drive motor arranged on the device body 14. The drive motor is, in particular, an electric motor.

[0082] The cleaning machine 10 is assigned a forward direction of travel 18. A wheel axle 20 of the wheel assembly 16 lies transversely and, in particular, perpendicularly to the forward direction of travel 18.

[0083] In one embodiment, at least one roller 22 is arranged on the device body 14 for further support against a base. In particular, in addition to being rotatable about a roller axis, the roller 22 is also rotatable about an axis perpendicular to this roller axis (indicated in Figure 1 by reference numeral 24).

[0084] The roller(s) 22 can be designed as swivel casters, which are accordingly connected to a steering device such as a steering wheel, or they can be freely rotatable about the axis 24 to facilitate a change of direction. A suction bar assembly 28 is located on the device body 14 in the area of ​​a rear end 26.

[0085] The suction bar assembly 28 has a lip assembly 30, which comprises a first lip 32 and an opposing second lip. The first lip 32 faces the cleaning head 12 and is oriented towards the wheel assembly 16 and the roller or rollers 22.

[0086] The lip assembly 30 forms a suction nozzle.

[0087] A blower unit 34 is attached to the device body 14, which generates a suction flow during operation that acts on the suction bar unit 28.

[0088] The blower unit 34 is connected to a tank unit 36 ​​for dirt fluid, which receives sucked-in dirt fluid, which is particularly liquid-containing.

[0089] It is specifically provided that the suction bar device 28 can be lifted from the base 17, so that, for example, during a transport journey of the cleaning machine 10, the suction bar device 28 does not touch a surface on which the cleaning machine 10 is driven.

[0090] The device body 14 has a front end 38 facing away from the rear end 26.

[0091] The device body 14 has a cover with a front 40 at the front end 38, a rear 42 facing away from the rear end 26, and a first lateral side 44 and an opposite second lateral side 46. The suction bar assembly 28 is longer than the width between the first lateral side 44 and the second lateral side 46 would suggest. It projects beyond the device body 14 at the first lateral side 44.

[0092] This results in effective suction of a dirty water solution on a surface to be cleaned with good edge penetration on the second lateral side 46.

[0093] In the illustrated embodiment, the cleaning machine 10 is designed as a trailing machine, which is in particular hand-guided.

[0094] In the area of ​​the rear end 26, an operating device 48 is arranged on the upper side of the device body 14, via which an operator can make settings for the operation of the cleaning machine 10, operate it and can also perform hand guidance via a corresponding hand guidance device 50.

[0095] An operator stands on the surface 17, which is to be cleaned by the cleaning machine 10, and stands behind the rear end 26 behind the suction bar device 28 and guides the cleaning machine 10 via the hand guide device 50.

[0096] The device body 14 has an underside 52 which faces the surface 17 on which the cleaning machine 10 stands.

[0097] The device body 14 has a recess (bulge) 54 between the front 40 and the underside 52. This recess 54 is a free space towards the front end 38 and towards the underside 52. It is bounded by a section 56 of the device body 14, on which the wheel assembly 16 is located, and by a section 58, which is oriented transversely to the section 56 and extends from the section 56 to the front end 38. The section 58 forms, in effect, a roof for the recess 54. The cleaning head 12 is positioned in the recess 54.

[0098] A tank 60 for cleaning fluid is mounted on the device body 14. The tank 60 is designed to hold water, optionally with an added surfactant cleaning agent. It is also possible that a separate reservoir for a cleaning agent additive is provided, in which case the tank 60 holds only water.

[0099] A supply device 62 for cleaning fluid to the cleaning head 12 is arranged on the device body. In particular, a pump 64 is provided for conveying cleaning fluid from the tank device 60 to the cleaning head 12.

[0100] The cleaning head 12 is provided with a (cleaning head) supply device 66 for cleaning fluid, which is fluidly coupled to the supply device 62.

[0101] The tank assembly 36 for dirt fluid is detachably arranged on the device body 14.

[0102] The tank assembly 60 for cleaning fluid can be fixed or removable on the device body 14.

[0103] The cleaning head 12 comprises a holder 68. The cleaning head 12 is held on the device body 14 by the holder 68. The holder 68, in turn, holds a drive plate 70, which is movably mounted on the holder 68 and driven. The drive plate 70 is a cleaning tool or itself holds a cleaning tool 71, which acts on the surface to be cleaned during cleaning operation. The holder 68 comprises a plate 72. In one embodiment, the plate 72 has at least approximately a straight side 74. This straight side 74 faces the wheel assembly 16 (when the cleaning head 12 is in a cleaning operation swivel position 75, as shown in Figure 1).

[0104] Starting from the straight side 74, the outer contour of the plate 72 is curved. Outwardly, the plate 72, with its straight side 74 and curved contour, has the shape of a D. Such a cleaning head 12 is therefore sometimes also referred to as a D-shaped cleaning head.

[0105] The plate 72 covers the movable drive plate 70 upwards towards the device body 14 and specifically towards area 58 of the device body 14 (when the cleaning head 12 is in its cleaning operation swivel position 75). It also forms a protective cover for the drive plate 70.

[0106] A drive motor 76 is located on the upper side of the plate 72, which faces the device body 14 (and specifically the area 58 when the cleaning head 12 is in the cleaning operation swivel position 75 as shown in Figure 1). This drive motor 76 is centrally located on the plate 72 and is rigidly connected to the plate 72 (and thus to the holder 68). The drive motor 76 is an electric motor.

[0107] It receives its electrical power supply via a battery unit located on the device body 14. Furthermore, a signal-effective connection to a control unit, also located on the device body 14, is provided.

[0108] The drive motor 76 has a drive shaft 78 which rotates around a rotation axis 79 (Figure 5).

[0109] The holder 68 has an opening 80 on the plate 72 through which the drive shaft 78 passes. A support 82 is attached to the plate 72. This support 82 is fixed to the plate 72 by means of post elements 84. The support 82 has an opening 86 through which the drive motor 76 passes.

[0110] On the support 82, a first web 88 and a second web 90 are spaced apart from each other. The drive motor 76 is positioned between the first web 88 and the second web 90. The first web 88 and the second web 90 project beyond the drive motor 76. The first web 88 and the second web 90 support a pivot bearing part 92a of a pivot bearing 92, by means of which the cleaning head 12 is pivotably held on the device body 14. The associated pivot bearing part 92b, which together with the pivot bearing part 92a forms the pivot bearing 92, is fixed to the device body 14 at area 58.

[0111] The cleaning head 12 is suspended from the device body 14 at the area 58 in the recess 54 via the pivot bearing 92. A pivot axis 94 of the pivot bearing 92 is parallel to the wheel axis 20. The pivot axis 94 lies transversely and, in particular, perpendicular to the forward direction of travel 18.

[0112] As explained below, the cleaning head 12 can be moved into a tool-changing swivel position 93 in front of the front 40 via the swivel bearing 92 (Figures 6 to 9).

[0113] A strip 96 (Figures 6, 7) is located on the device body 14 adjacent to the wheel assembly 16. The strip 96 is positioned within the recess 54. The strip 96 extends parallel to the pivot axis 94, i.e., parallel to the wheel axis 20. The strip 96 serves to define the cleaning operation pivot position 75 of the cleaning head 12. It includes end-face openings 97 (see Figure 6). An angled element 98 is mounted on the support 82, and thus on the holder 68, projecting beyond the straight side 74 of the plate 72. It extends over essentially the same length as the straight side 74 and is oriented parallel to and spaced apart from it.

[0114] Spaced-apart bushings 100 are arranged on the angled element 98, with each bushing corresponding to an end face of the strip 96. A pin element 102 is loosely or detachably attached to each bushing. This forms a locking device, whereby, in a cleaning operation swivel position 75 of the cleaning head 12, the respective pin element 102, which is guided or mounted in the bushing 104, is immersed in a respective end face opening 97 of the strip 96. When the pin element 102 is immersed, the swivel is fixed, thus positioning the cleaning head 12 in the corresponding position on the cleaning machine 10 (Figure 1).

[0115] On the angle element 98, a first roller 104a and a second roller 104b are spaced apart in the area of ​​the respective bushing 100.

[0116] The drive plate 70 is located between the first roller 104a and the second roller 104b (see, for example, Figure 6). The rollers 104a and 104b serve to support the cleaning head 12 in a tool-changing position 93 as shown in Figure 6, or to bring it into this tool-changing position.

[0117] In the cleaning operation swivel position 75 of the cleaning head 12 according to Figure 1, the rollers 104a, 104b are spaced apart from the surface 17 on which the cleaning machine 10 stands.

[0118] A handle 106, in particular in the form of a handle bracket, is arranged on the holder 68 facing away from the straight side 74. It is located on a front side of the cleaning head 12 that faces away from the wheel assembly 16 (relative to the cleaning operation swivel position 75). In one embodiment, the handle 106 is movably arranged so that it can be retracted into a recess 108 when not in use and does not protrude, or does not protrude completely, beyond an outer contour of the holder 68.

[0119] The handle 106 allows the operator to pull the cleaning head 12 from the cleaning swivel position shown in Figure 1 to the tool-changing swivel position 93 shown in Figure 6 when the locking device is released. The operator is positioned in front of the front 40 of the device body 14 for this purpose.

[0120] A bumper 110 is arranged on one circumferential side of the holder 68. This bumper is flexible in itself and / or flexibly mounted on the holder 68. It is made primarily of a plastic material.

[0121] The bumper 110 serves to prevent damage to the obstacle (and also to the cleaning head 12) during cleaning operations if the cleaning head 12 bumps into an obstacle.

[0122] In one embodiment, a roller 112 is mounted on the holder 68, projecting laterally beyond the bumper 110. Specifically, the roller 112 is arranged on one side (in the embodiment according to Figure 1, on the second lateral side 46) where the suction bar assembly 28 does not project beyond the corresponding lateral side 46. On this second lateral side 46, the cleaning machine 10 can then be guided close to the edge of a wall, and the roller 112 has a bumper function, optionally rolling along the wall or the like to prevent "hard impacts".

[0123] A flange 114 (Figures 4, 5) is mounted on the holder 68, facing away from the top surface towards the drive plate 70. In one embodiment, this flange 114 is fixed to the plate 72 in a rotationally fixed manner. The flange 114 has a cylindrical recess 116. The recess 116 surrounds the opening 86 in the holder 68. A coupling device 118 for torque-acting coupling of the drive plate 70 to the drive shaft 78 is provided in the recess 116.

[0124] In one embodiment, an eccentric device 120 is mounted on the drive shaft 78 in the recess 116. The eccentric device 120 comprises an eccentric shaft 122. The eccentric shaft 122 has a rotational axis 124, which is radially offset from the rotational axis 79. The eccentric device 120 is designed such that, due to the rotation of the drive shaft 78 about the rotational axis 79, the drive plate 70 rotates about the offset rotational axis 124. Simultaneously, the eccentric shaft 122 undergoes an orbital movement about a center defined by the rotational axis 79. Thus, the drive plate 70 experiences a superimposed rotational movement about the rotational axis 124 and an orbital movement about the orbital axis 79.

[0125] Regarding a possible training of the eccentric device 120, reference is made to US 9,649,003 B2.

[0126] A counterweight 126 (balancing mass) is arranged on the eccentric device 120 to keep vibrations low.

[0127] Furthermore, a splash guard device 128 is attached to the eccentric device 120, which is assigned to the opening 80.

[0128] The eccentric device 120 includes in particular a rolling bearing 130 for the movement of the eccentric shaft 122 on the corresponding orbital path.

[0129] The flange 114 has a wall 132, which is a wall of the recess 116 (Figure 4).

[0130] A groove 134, which is a second groove, is formed on the flange 114. A first groove 136 is located on the drive plate 70, as will be explained in more detail below. In the described embodiment, the second groove 134 (see, for example, Figure 4) is fixedly connected to the holder 68. It is circular and has a closed circular shape. A corresponding axis, on which the center of the circle is located, is parallel or coaxial to the axis of rotation 79.

[0131] The second groove 134 has the shape of a circular ring. It surrounds the recess 108.

[0132] The second channel 134 is assigned a sealing device 138. The sealing device 138 ensures a seal to the holder 68 and thus to the plate 72.

[0133] The second channel 134 comprises the wall 132, which is an inner wall, and an outer wall 140, which surrounds the wall 132. The sealing device 138 has a first sealing lip 142, which is located on the outer wall 140. It is positioned on an end face of the outer wall 140 facing the plate 72. A second sealing lip 144 is located on the wall 132, which is an inner wall, in the same manner.

[0134] The second channel 134 has an outlet device 146, which is directed towards a center given by the axis of rotation 79 and is directed towards a central area 148 of the drive plate 70.

[0135] In particular, a channel 150 is provided which has an inclination relative to the direction of gravity when the cleaning machine 10 is properly positioned on a level surface, in order to allow cleaning fluid to flow towards the central area 148. The channel 150 is formed on the drive plate 70 and / or the flange 114. It can include areas on the flange 114 and areas on the drive plate 70. The drive plate 70 can, as described above, itself be designed as a cleaning tool.

[0136] In the illustrated embodiment, the drive plate 70 releasably holds the cleaning tool 71. The drive plate 70 in turn is releasably connected to the eccentric device 120.

[0137] The drive plate 70 has a bottom surface 152. In one embodiment, a hook plate 154 is attached to the bottom surface 152 (Figure 7). The hook plate 154 is not shown in the illustrations according to Figures 2, 8 and 9.

[0138] In this embodiment, the cleaning tool 71 is a cleaning disc which can be fixed to, or is fixed in place of, the hook plate 154. The cleaning disc 71 thus has a counterpart to the hook plate 154 for this "hook fixation".

[0139] The drive plate 70 has an opening 156 at the central area 148. This opening 156 extends through to the underside 152.

[0140] The first groove 136 is arranged on the upper surface 158 of the drive plate 70, facing away from the underside 152. The first groove 136 is radially spaced from the central area 148 and the opening 156. With respect to a radial direction, it is closer to a circumferential outer surface 160 of the drive plate 70 than to an edge of the opening 156.

[0141] The first channel 136 has a circular ring shape. The first channel 136 forms a closed circular ring.

[0142] The first channel 136 comprises an outer wall 162, which faces the circumferential outer surface 160. It comprises a spaced-apart inner wall 164. The inner wall 164 and the outer wall 162 are arranged concentrically to each other. Their distance is such that, as described in more detail below, the coupling of cleaning fluid during the eccentric-orbital movement of the drive plate 70 is enabled.

[0143] A sealing device or spray gun device 166 is located on the outer wall 162. It comprises a sealing lip or splash guard lip, which is located particularly on the end face of the outer wall 162.

[0144] In principle, it is possible that the sealing device / splash guard device 166 touches the plate 72 on its inside and that a seal is also present here.

[0145] In the embodiment shown, the sealing device / splash guard device 166 essentially has a splash guard function and at least a high level of sealing functionality is not necessary.

[0146] For mechanical reinforcement, a wall 168 is arranged around the opening 156 in one embodiment. Radially oriented struts 170 lie between the wall 168 and the inner wall 164. These struts 170 are connected, in particular, to a base 172 of the drive plate 70. In one embodiment, the wall 168 has openings 174 for channels of the channel assembly 150.

[0147] The drive plate 70 is coupled to the eccentric device 120 via the wall 168 and sits in the flange 114.

[0148] A plurality of through openings 176 are formed on the base 172 within the first channel 136. These openings 176 are arranged in a circle and are evenly spaced. Cleaning fluid can flow through them from the first channel 136 to the underside 152 of the drive plate 70. The hook plate 154 is provided with corresponding openings. Cleaning fluid can be supplied to the cleaning tool 71 via the first channel 136 with the openings 176, spaced apart from the central area 148. In one embodiment, the outer wall 162 with the sealing device 166 is provided to have a greater height than the inner wall 164. This serves to accommodate the centrifugal force of the cleaning fluid in the first channel 136.

[0149] Slots 178 are arranged on the base 172 between the inner wall 164 and the wall 168 between adjacent struts 170. The hook plate 154 has corresponding slots or openings, each of which is assigned to the slots 178.

[0150] It is specifically intended that cleaning fluid is systematically applied to the cleaning disc 71 via the first channel 136. Any cleaning fluid that may penetrate into the area between the wall 168 and the inner wall 164 can be drained away via the slots 178. Systematic application of cleaning fluid via the slots 178 is not intended.

[0151] The feed device 62, which is located on the cleaning head 12, comprises a distributor 180 (Figure 4). In one embodiment, the distributor 180 has a branch 182. It has a first outlet 184, which opens into the first channel 136, particularly from above, via a first hose nipple 186. It has a second outlet 188, which opens into the second channel 134, particularly from above, via a second hose nipple 190.

[0152] In one embodiment, the feed device 62 on the cleaning head 12 is formed by a hose with the distributor 180, wherein a first hose section 192 is provided, on which the first hose nipple 186 is located, and a second hose section 194 is located, on which the second hose nipple 190 is located. The first channel 136 is movable relative to the first hose nipple 186, exhibiting a combination of orbital and rotational movement. As mentioned above, the first channel 136 is designed and wide enough to position the first hose nipple 186 within the channel 136, allowing the supply of cleaning fluid without obstructing this movement or contacting the walls 162, 164.

[0153] The second channel 134 is immovable relative to the second hose nipple 190.

[0154] In one embodiment, the distributor 180 is designed such that the distribution of the liquid quantity between the first channel 136 and the second channel 134 is equal, meaning that the same quantity of cleaning fluid is dispensed via the first hose nipple 186 and the second hose nipple 190. This is achieved in particular by the fact that the first hose section 192 and the second hose section 194 have the same diameter.

[0155] In principle, a different distribution may also be provided.

[0156] In one embodiment, an adjustment device 196 is provided on the distributor 180. This is in particular in signal-effective communication with the operating device 48.

[0157] The adjustment device 196 allows the distribution of the cleaning fluid quantity between the first channel 136 and the second channel 134 to be variably adjusted.

[0158] The cleaning tool 71, particularly in its configuration as a cleaning disc, has a central opening 198 which corresponds to the central area 148 and the opening 156 of the drive plate 70. The second groove 134 allows access via the central opening 198.

[0159] Apply cleaning fluid directly to the surface to be cleaned 17.

[0160] It may be provided that a centering device 200 is associated with the underside 152 of the drive plate 70. The centering device 200 serves to center the cleaning disc on the drive plate.

[0161] For a cleaning operation, the cleaning machine 10 with the cleaning head 12 works as follows:

[0162] The cleaning head 12 is in its cleaning operation swivel position 75 (Figure 1), in which the swiveling about the swivel axis 94 is locked by locking the angle element 98 to the bar 96. The underside 152 of the drive plate 70 is oriented essentially parallel to a base on which the cleaning machine 10 rests.

[0163] In a cleaning operation, the drive plate 70 is driven by the drive motor 76 and the eccentric device 120. This movement is the superposition of an orbital motion with a rotary motion around the eccentric shaft 122. This results in an effective action on the floor to be cleaned. In this context, reference is made to US 9,649,003 B2.

[0164] Cleaning fluid is dispensed from the tank unit 60. This fluid is supplied to the cleaning head 12 via the feed unit 62. At the cleaning head 12, the feed unit 66 ensures that cleaning fluid is supplied to the drive plate 70.

[0165] Cleaning fluid is distributed via distributor 180. Cleaning fluid is applied to the cleaning tool 71 via the first channel 136. Thus, the cleaning tool 71 is moistened.

[0166] The first channel 136 moves relative to the drive plate 70. Cleaning fluid is also introduced into the second channel 134. This fluid then flows towards the central area 148, and cleaning fluid can reach a surface 17 to be cleaned directly via the central opening 198.

[0167] The supply of cleaning fluid is divided into two basic areas, namely the central area 148 and directly onto the cleaning tool 71 via the first channel 136.

[0168] The first channel 136 and the second channel 134 or the first channel 136 and the central area 148 are fluidly separated.

[0169] It has been shown that a purely central supply of cleaning fluid to the central area 148 causes problems due to the rotary-orbital movement of the drive plate 70. Supplying cleaning fluid to an outer area has problems with uniformity.

[0170] In the solution according to the invention, cleaning fluid is supplied both centrally via the second channel 134 and at the outer edge via the first channel 136. This results in uniform wetting of the area 17 to be cleaned. The problems in the central area 144 caused by the movement of the drive plate 70 are reduced, since a smaller quantity of cleaning fluid is applied there.

[0171] The drive plate 70 performs a vibratory movement on the cleaning head 12 during a cleaning process, which generally disrupts the application of cleaning fluid to the central area 148. Furthermore, the eccentric device 120 occupies a corresponding amount of space. The design with the second channel 134 around the recess 108 achieves partial application to the central area 148, and the first channel 136 provides further application to the cleaning tool 71. In the solution according to the invention, effective application of cleaning fluid for an effective cleaning process is achieved at the cleaning head 12, which is designed as an orbital head.

[0172] Cleaning fluid, which is dispensed via the central area 148, is quickly distributed over the surface to be cleaned by the movement of the drive plate 70. Furthermore, splashing of cleaning fluid outwards is reduced with a central application, and the required amount of cleaning fluid can be kept lower.

[0173] By dividing the amount of cleaning fluid between the first channel 136 and the second channel 134, an optimized application of cleaning fluid is achieved even with a complex movement of the drive plate 70.

[0174] Furthermore, the eccentric device 120 and the drive motor 76 can be effectively protected from splashing water. This also provides effective protection for the bearings in particular.

[0175] On the cleaning machine 10, the cleaning tool 71 can be easily changed by an operator.

[0176] The cleaning head 12 has a tool-changing swivel position 93 (Figures 6 to 9) in which an underside 152 of the drive plate 70 is easily accessible.

[0177] The swivel position for tool change is such that it differs from the cleaning operation swivel position 75 by an angle of at least 70° and, for example, by an angle between 70° and 90°.

[0178] In the embodiment shown in Figure 6, this swivel angle is approximately 80°, with the 0° angle being defined as the angle in which the cleaning operation swivel position 75 is present (compare Figure 1). Outside of a cleaning process, the tool change swivel position 93 is reached by releasing the lock on the bar 96. An operator can then (particularly from the front) pull the holder 68 into the corresponding tool change swivel position 93 using the handle 106. When a certain swivel angle is reached, the rollers 104a, 104b bear against the base 17 on which the cleaning machine 10 rests. In particular, the rollers 104a, 104b touching or bearing against the base 17 defines the corresponding tool change swivel position 93.

[0179] It can be provided that the rollers 104a, 104b are elastically mounted in order to enable support even before reaching the final tool change swivel position 93.

[0180] When the tool-changing swivel position 93, as shown in Figure 6, is reached, the operator has easy access to the cleaning tool 71. He can detach it accordingly (compare Figures 7 to 9). He can then easily attach a new cleaning disc 71, ensuring, in particular, that it is centered so that the central opening 198 aligns with the central area 148. Since the operator has easy access, including a direct view, of the underside 152 of the drive plate 70 during this process, the attachment is optimized with high centering accuracy.

[0181] Above, cleaning machine 10 was described as a walk-behind cleaning machine. In principle, this cleaning machine could also be a ride-on machine, for example.

[0182] The cleaning tool 71 can be designed in different ways. For example, it can be designed as a pad. It can also be designed as a brush tool or as a combination of, for example, brushes with textile sections. As described above, the cleaning tool 71 is detachable from the drive plate 70. However, it is also possible that the drive plate 70 contains permanently attached tool elements.

[0183] When the cleaning head 12 pivots, the drive motor 76 also pivots. The cleaning head 12, which connects to the cleaning machine 10, includes the swivel bearing part 92b, the interface between the feed unit 62 and the feed unit 66, and electrical connections for power supply and signal transmission. A cleaning machine 10 can generally be retrofitted with a cleaning head 12 and a distributor 180.

[0184] Furthermore, it is fundamentally possible that the swiveling arrangement of the cleaning head 12 with the swivel bearing 93 takes place independently of the described cleaning agent distribution on the drive plate 70.

[0185] Furthermore, it is possible that the distribution via the distributor 180 can also take place without providing a swivel bearing 92.

[0186] Reference symbol list

[0187] Cleaning machine

[0188] Cleaning head

[0189] Device body

[0190] Wheel equipment

[0191] Floor

[0192] Forward direction

[0193] wheel axle

[0194] role

[0195] axis

[0196] Rear end

[0197] suction bar device

[0198] Lip facility

[0199] First lip

[0200] blower unit

[0201] Tank system for dirty fluid

[0202] Front end

[0203] front

[0204] Back

[0205] First lateral end

[0206] Second lateral end

[0207] Operating device

[0208] hand guide device

[0209] bottom

[0210] Exclusion

[0211] Area

[0212] Area

[0213] Tank system for cleaning fluid

[0214] Feeding device

[0215] pump

[0216] Feed device holder

[0217] drive plate

[0218] Cleaning tool

[0219] plate

[0220] Straight side

[0221] Cleaning operation - swivel position

[0222] drive motor

[0223] drive shaft

[0224] axis of rotation

[0225] opening

[0226] carrier

[0227] Post elements

[0228] opening

[0229] First jetty

[0230] Second jetty

[0231] Swivel bearing a Swivel bearing part b Swivel bearing part

[0232] Tool change swivel position

[0233] Swivel axis

[0234] bar

[0235] opening

[0236] Angle element 0 Bushing 2 Pin element 4a First roller 4b Second roller 6 Handle 8 Recess 0 Bumper 2 Roller 4 Flange 6 Recess Coupling device

[0237] Eccentric mechanism

[0238] Eccentric shaft

[0239] axis of rotation

[0240] leveling compound

[0241] Splash guard

[0242] rolling bearings

[0243] wall

[0244] Second gully

[0245] First gully

[0246] Sealing device

[0247] exterior wall

[0248] First sealing lip

[0249] Second sealing lip

[0250] Outlet device

[0251] Central area

[0252] Canal equipment

[0253] bottom

[0254] Hook plate

[0255] opening

[0256] Top

[0257] Extensive exterior

[0258] exterior wall

[0259] inner wall

[0260] Sealing device / splash guard device

[0261] wall

[0262] striving

[0263] Floor

[0264] passage

[0265] opening

[0266] Slots

[0267] Distribution

[0268] Branch First outlet First hose nipple Second outlet Second hose nipple First hose section Second hose section Adjustment device Central opening Centering device

Claims

Patent claims 1. Cleaning head for a cleaning machine (10), comprising a holder (68) by which the cleaning head (12) is held on the cleaning machine (10), a drive plate (70) which holds or comprises a cleaning tool (71) which is movably mounted on the holder (68) and is driven to move during a cleaning process, and a supply device (66) for cleaning fluid, characterized in that the supply device (66) for cleaning fluid has a distributor (180) with at least a first outlet (184) and a second outlet (188), that the first outlet (184) is fluidly connected to a channel (136) on the drive plate (70), that the second outlet (188) is fluidly connected to a central area (148) of the drive plate (70), and that the channel (136) is radially spaced from the central area (148) and fluidly separated from the central area (148). is.

2. Cleaning head according to claim 1, characterized in that the channel (136) which is fluidly connected to the first outlet (184) is a first channel (136) with at least one of the following: the first channel (136) is arranged in a ring shape around the central area (148); the first channel (136) has an annular shape; the first channel (136) is radially spaced from a circumferential outer surface (160) of the drive plate (70); the first groove (136) is closer to a circumferential outer surface (170) of the drive plate (70) than to an edge of the central area (148); the first groove (136) forms a closed ring; a first groove (136) is movable relative to the holder (68).

3. Cleaning head according to claim 1 or 2, characterized in that the channel (136), which is fluidly connected to the first outlet (184), is a first channel (136) with at least one of the following: the first channel (136) has at least one and in particular a plurality of openings (176) extending to an underside (152) of the drive plate (70); at least one and in particular a plurality of uniformly spaced openings (176) are arranged on a channel bottom of the first channel (136); cleaning fluid is applied directly to the cleaning tool (71) via the first channel (136).

4. Cleaning head according to one of the preceding claims, characterized in that the channel (136) which is fluidly connected to the first connection (184) is a first channel (136), and that a sealing device (166) or splash guard device (166) is associated with the first channel (136).

5. Cleaning head according to claim 4, characterized by at least one of the following: the sealing device (166) or splash guard device (166) is designed as a sealing lip or splash guard lip; the sealing device (166) or splash guard device (166) is located on an end face of a wall (162) of the first channel (136); the sealing device (166) or splash guard device (166) is located on an outer wall (162) of the first channel (136), which faces a circumferential outer surface (160) of the drive plate (70).

6. Cleaning head according to one of the preceding claims, characterized in that the holder (68) or the drive plate (70) has a second channel (134) which is fluidly connected to the second outlet (188) of the distributor (180) and which is fluidly connected to the central area (148).

7. Cleaning head according to claim 6, characterized in that the second channel (134) is located on a flange (114) which accommodates a bearing device for the drive plate (70).

8. Cleaning head according to claim 6 or 7, characterized by at least one of the following: the second channel (134) surrounds the central area (148); the channel (136), which is fluidly connected to the first outlet (184), is a first channel (136) and fluidly surrounds the second channel (134) separately from the second channel (134); The first channel (136) is radially spaced from the second channel (134); the second channel (134) has a smaller diameter than the first channel (136); the second channel (134) has an outlet (146) leading to the central area (148); at least one channel (150) leads from the second channel (134) to the central area (148); the second channel (134) is arranged in an annular shape around the central area (148); the second channel (134) has an annular shape; the second channel (134) is radially spaced from a circumferential outer surface (160) of the drive plate (70); the second channel (134) forms a closed ring or part of a ring; the second channel (134) surrounds a coupling area of ​​a drive motor (76) to the drive plate (70); the second groove (134) is immovable relative to the holder (68).

9. Cleaning head according to one of claims 6 to 8, characterized in that a sealing device (138) is associated with the second channel (134) with at least one of the following: the sealing device (138) comprises at least one sealing lip (142, 144); a first sealing lip (142) is located on an outer wall (140) of the second channel (134), which faces a circumferential outer surface (160) of the drive plate (70); a second sealing lip (144) is located on an inner wall (132) of the second channel (134), which faces the central area (148); the sealing device (138) is located at the end face of a wall (132; 140) of the second channel (134).

10. Cleaning head according to one of the preceding claims, characterized in that the drive plate (70) has a central opening (156) to a bottom side (152) of the drive plate (70) at the central area (148).

11. Cleaning head according to claim 10, characterized by at least one of the following: the central opening (156) is located on an extension of an axis (79) for movement of the drive plate (70); the central opening (156) has a larger area than an opening (176) of the channel (136) which is fluidly connected to the first connection (184); The cleaning tool (71) has a central opening (198) which is positioned above the central opening (156) of the drive plate (70); a surface (17) to be cleaned can be directly supplied with cleaning fluid via the central opening (156) of the drive plate (70).

12. Cleaning head according to one of the preceding claims, characterized by at least one of the following: a first hose nipple (186) is assigned to the first outlet (184), which opens into the associated channel (136); a second hose nipple (190) is assigned to the second outlet (188), which opens into a second channel (134), which is in fluid-effective communication with the central area (148).

13. Cleaning head according to one of the preceding claims, characterized in that the distributor (180) divides the cleaning fluid between the first outlet (184) and the second outlet (188).

14. Cleaning head according to claim 13, characterized by at least one of the following: the division is fixed; the division is at least approximately 50 :

50.

15. Cleaning head according to claim 13, characterized by an adjustment device (196) by means of which the division can be adjusted.

16. Cleaning head according to one of the preceding claims, characterized in that a drive motor (76) for the drive plate (70) is located on the holder (68) and is in particular part of the cleaning head.

17. Cleaning head according to claim 16, characterized in that a splash guard (128) is assigned to an opening (80) on the holder (68) through which a drive shaft (78) of the drive motor (76) is guided.

18. Cleaning head according to one of the preceding claims, characterized in that the drive plate (70) is rotatable and mounted and driven in an orbital motion.

19. Cleaning head according to one of the preceding claims, characterized in that the drive plate (70) is mounted on an eccentric shaft (122) which is driven rotaryally and in an orbital motion by the drive motor (76).

20. Cleaning head according to claim 19, characterized in that a counterweight (126) is assigned to the eccentric shaft (122).

21. Cleaning head according to one of the preceding claims, characterized in that the cleaning tool is a cleaning disc (71) which is interchangeably held on the drive plate (70).

22. Cleaning head according to one of the preceding claims, characterized in that the drive plate (70) has a hook plate (154) for fixing the cleaning tool (71).

23. Cleaning head according to one of the preceding claims, characterized in that a handle (106) in particular in the form of a handle bracket is arranged on the holder (68).

24. Cleaning head according to one of the preceding claims, characterized in that a bumper (110) is arranged on the holder (68).

25. Cleaning head according to one of the preceding claims, characterized in that at least one roller (104a; 104b) and in particular at least two rollers (104a, 104b) are arranged on the holder (68).

26. Cleaning head according to one of the preceding claims, characterized in that a centering device (200) for the cleaning tool (71) is arranged on the drive plate (70).

27. Cleaning machine comprising a device body (14) and a cleaning head (12) according to the preamble of claim 1 or according to one of the preceding claims, characterized in that the cleaning head (12) is lockably pivotably mounted on the device body (14), and that the cleaning head (12) has at least one tool-changing pivot position (93) in which the cleaning head (12) is positioned in front of an outer surface (40) of the device body (14) and an underside (152) of the drive plate (70) is accessible to an operator.

28. Cleaning machine according to claim 27, characterized in that, with respect to a cleaning operation swivel position (75) of the cleaning head (12), the at least one tool change swivel position (93) is located at a swivel angle of at least 70° and in particular of at least 80°.

29. Cleaning machine according to claim 27 or 28, characterized by at least one of the following: a pivot axis (94) of the pivotability of the cleaning head (12) is parallel to a wheel axis (20); A pivot axis (94) of the pivotability of the cleaning head (12) is transverse and, in particular, perpendicular to a forward direction of travel (18) of the cleaning machine; the outside of the cleaning machine, in front of which the cleaning head (12) is positioned in its at least one tool change pivot position (93), is a front side (40) of the device body (14) with respect to a forward direction of travel (18) of the cleaning machine.

30. Cleaning machine according to one of claims 27 to 29, characterized in that the device body (14) has a recess (54) in which the at least one cleaning head (12) is positioned and can be pivoted to the device body (14).

31. Cleaning machine according to claim 30, characterized in that a pivot bearing (92) for pivoting the cleaning head (12) to the device body (14) is positioned in the recess (54).

32. Cleaning machine according to one of claims 27 to 31, characterized in that the cleaning head (12) in a cleaning operation swivel position (75) projects beyond the device body (14) at least with a partial area.

33. Cleaning machine according to one of claims 27 to 32, characterized in that a strip (96) is arranged on the device body (14) with which the cleaning head (12) can be fixed to define a cleaning operation swivel position (75).

34. Cleaning machine according to one of claims 27 to 33, characterized in that a handle (106) is arranged on the cleaning head (12) for pulling the cleaning head (12) into its at least one tool change pivot position (93).

35. Cleaning machine according to one of claims 27 to 34, characterized in that at least one roller (104a; 104b) is arranged on the cleaning head (12), in particular with at least one of the following: in a cleaning operation, the at least one roller (104a; 104b) is spaced apart from a surface (17) to be cleaned; in the at least one tool-change swivel position (93), the cleaning head (12) is supported on the at least one roller (104a; 104b) on a base (17) on which the cleaning machine stands; during the transition of the cleaning head (12) into the at least one tool-change swivel position (93), the cleaning head (12) is supported on the at least one roller (104a; 104b) on a base (17).

36. Cleaning machine according to one of claims 27 to 35, characterized by at least one of the following: a suction bar device (28) is arranged on the device body (14); a blower device (34) for generating a suction flow is arranged on the device body (14), which is in fluidly effective communication with a suction bar device (28); A tank assembly (36) for dirty fluid is located on the device body (14).

37. Cleaning machine according to one of claims 27 to 36, characterized by at least one of the following: a tank device (60) for cleaning fluid is located on the device body (14); a device body supply device (62) for cleaning fluid is located on the device body (14), which is connected to the supply device (66) for cleaning fluid of the cleaning head (12); a pump (64) for conveying cleaning fluid to the cleaning head (12) is located on the device body (14).

38. Cleaning machine according to one of claims 27 to 37, characterized by a self-propelled design.

39. Cleaning machine according to one of claims 27 to 38, characterized by a design as a scrubbing-vacuum machine.

40. Cleaning machine according to one of claims 27 to 39, characterized by an operating device (48) which is in signal-effective connection with an adjusting device (196) on a distributor (180) for cleaning fluid on the cleaning head (12).

41. Method for operating a cleaning machine comprising a drive plate (70) with a cleaning tool (71), wherein the drive plate (70) is driven in an orbital motion, in which cleaning fluid is supplied to the drive plate (70), wherein a distributor (180) divides the cleaning fluid into a first part, which is supplied to a central area (148) of the drive plate (70), and into a second part, which is supplied to a trough (136) that surrounds the central area (148) and is fluidly separated from the central area (148).

42. Method according to claim 41, characterized in that cleaning fluid is applied directly to a surface (17) to be cleaned via the central area (148).

43. Method according to claim 41 or 42, characterized in that cleaning fluid is supplied directly to the cleaning tool (71) via the channel (136). ***

Images