Floor cleaning machine and method for operating a floor cleaning machine

Abstract

The invention relates to a floor cleaning machine (10) comprising a floor head (12), which is associated with a contact plane (28) for a floor (18) to be cleaned; a first disc holder (48) and a first cleaning tool (56), said first disc holder (48) being provided on the floor head (12), holding the first cleaning tool (56), and being rotated about a first rotational axis (52) during the operation of the floor cleaning machine (10); a second disc holder (50) and a second cleaning tool (58), said second disc holder (50) being provided on the floor head (12), holding the second cleaning tool (58), and being rotated about a second rotational axis (54) during the operation of the floor cleaning machine (10), said first rotational axis (52) of the first disc holder (48) and said second rotational axis (54) of the second disc holder (50) each being oriented transversely to the contact plane (28), a first rotational direction of the rotation about the first rotational axis (52) and a second rotational direction of the rotation about the second rotational axis (54) being opposite each other; and a holding rod device (14), which is movably hinged to the floor head (12) by means of a joint device (16). The first cleaning tool (56) is mounted on the first disc holder (48) with axial and / or radial play (320), said floor head (12) being equipped with a first pressure element (338) which is paired with the first cleaning tool (56) and can be placed against the first cleaning tool (56) and by means of which a first angle of inclination (366) of the first cleaning tool (56) relative to the contact plane (28) is defined, and the second cleaning tool (58) is mounted on the second disc holder (50) with axial and / or radial play (320), said floor head (12) being equipped with a second pressure element (340) which is paired with the second cleaning tool (58) and can be placed against the second cleaning tool (58) and by means of which a second angle of inclination (368) of the second cleaning tool (58) relative to the contact plane (28) is defined.

Description

[0001] Floor cleaning machine and method for operating a floor cleaning machine

[0002] The invention relates to a floor cleaning machine, comprising a floor head, to which a mounting plane for a floor to be cleaned is assigned, a first disc holder and a first cleaning tool, wherein the first disc holder is arranged on the floor head and holds the first cleaning tool and is driven to rotate about a first axis of rotation during operation of the floor cleaning machine, a second disc holder and a second cleaning tool, wherein the second disc holder is arranged on the floor head and holds the second cleaning tool and is driven to rotate about a second axis of rotation during operation of the floor cleaning machine, wherein the first axis of rotation of the first disc holder and the second axis of rotation of the second disc holder are each oriented transversely to the mounting plane and a first direction of rotation about the first axis of rotation and a second direction of rotation about the second axis of rotation are opposite, and a holding rod device,which is movably connected to the base head by a joint device.

[0003] The invention further relates to a method for operating a floor cleaning machine, wherein the floor cleaning machine comprises a floor head, which is assigned a support plane for a floor to be cleaned; a first disc holder and a first cleaning tool, wherein the first disc holder is arranged on the floor head and holds the first cleaning tool and is driven in rotation about a first axis of rotation during operation of the floor cleaning machine;a second disc holder and a second cleaning tool, wherein the second disc holder is arranged on the floor head and holds the second cleaning tool and is driven to rotate about a second axis of rotation during operation of the floor cleaning machine, wherein the first axis of rotation of the first disc holder and the second axis of rotation of the second disc holder are each oriented transversely to the installation plane, and a first direction of rotation about the first axis of rotation and a second direction of rotation about the second axis of rotation are opposite; and a holding rod device which is movably connected to the floor head by a joint device.

[0004] WO 2022 / 03959 A1 discloses a cleaning machine with two cleaning tools, each tool being inclined relative to a surface to be cleaned and the tools rotating in opposite directions to generate propulsion, and the angle of inclination being variable.

[0005] EP 0 678 272 A1 discloses a floor cleaning machine with a chassis and two disc brushes arranged thereon, the brush plates of which are connected to their vertically arranged drive shafts in a rotationally fixed but gimbal-like manner. At least one of the brush plates is assigned at least one pressure roller, which can be pressed against the upper side of the brush plate and is mounted for rotation about an axis extending radially to the drive shaft axis. The pressure force acting on the pressure roller is adjustable by means of an adjustment device.

[0006] WO 2022 / 207808 A1 discloses a floor cleaning machine having a pressing device which is active with respect to a peripheral part of an upper surface of a left cleaning disc and a peripheral region of the upper surface of a right cleaning disc.

[0007] KR 10-2020-0012457 A discloses a cleaning machine with two inclined tools. DE 10 2016 208 895 A1 discloses a soil tillage module for a soil tillage machine with at least two rotatable soil tillage tools, which, in an operating position of the soil tillage module, are each rotatably mounted relative to a support structure about an axis of rotation oriented at least substantially perpendicular to a subsoil to be tilled. The drive system for driving the soil tillage tools comprises at least one electric motor and at least one belt drive coupled to a drive shaft of the at least one electric motor. The at least one electric motor is mounted in a horizontal orientation on the support structure such that the drive shaft is oriented at least substantially orthogonal to the axes of rotation of the tillage tools.

[0008] Further cleaning machines are known from CN 211749345 U, CN 204445698 U, US 8,161,595 Bl, DE 197 29 199 Al, KR 960004005 U, US 3,024,848 A, DE 1 239 448 B, GB 823 576 A and US 1,938,300 A.

[0009] The invention is based on the object of providing a floor cleaning machine of the type mentioned at the outset, in which propulsion for the floor head can be generated with a structurally simple design.

[0010] This object is achieved according to the invention in the floor cleaning machine mentioned at the outset in that the first cleaning tool is mounted on the first disc holder with (axial and / or radial) play, that a first pressure element is arranged on the floor head, which is assigned to the first cleaning tool, which can be placed against the first cleaning tool and via which a first angle of inclination of the first cleaning tool to the installation plane is determined, that the second cleaning tool is mounted on the second disc holder with axial and / or radial play, and that a second pressure element is arranged on the floor head, which is assigned to the second cleaning tool, which can be placed against the second cleaning tool and via which a second angle of inclination of the second cleaning tool to the installation plane is determined.

[0011] The first pressure element allows the first cleaning tool to be tilted relative to the installation plane due to the play, and the second pressure element allows the cleaning tool to be tilted relative to the installation plane due to the play. This allows for a corresponding forward thrust (which can depend on the angle of inclination).

[0012] In particular, it is intended that both axial and radial play be present. For example, the first cleaning tool or the second cleaning tool is centered on the associated disc holder via three bayonet pins, which allows a certain amount of radial play in addition to axial play.

[0013] Due to the play in combination with the corresponding pressure element, the solution according to the invention makes it possible for the corresponding first axis of rotation and the second axis of rotation to be spatially fixed with respect to the base head. This makes it possible, for example, to provide a common drive for the first disc holder and the second disc holder. A torque transmission device (a gear) for transmitting the torque of the drive to the disc holders can be achieved in a space-saving manner. In particular, the torque transmission device and the drive motor can be arranged and designed such that the corresponding axes of rotation are spatially fixed with respect to the base head. This results in a structurally simple design. Furthermore, the torque transmission device can be designed "flat," for example, with a small space requirement.The axial play, in conjunction with the respective pressure element, allows the cleaning tool to be tilted for propulsion. In particular, it is then provided that a cleaning tool on the floor head performs a type of precessional movement during rotation, with a rotation axis that is not spatially fixed and, in particular, revolves on a conical surface. This results in an effective cleaning action with propulsion and high maneuverability of the floor cleaning machine for an operator. The corresponding torque transmission device for transmitting torque to the disc holders can be designed relatively simply and effectively in a space-saving manner.

[0014] In the solution according to the invention, it is also possible in a simple manner to variably determine the corresponding first angle of inclination or second angle of inclination by appropriate positioning of the first pressure element and the second pressure element and in particular height positioning relative to the installation plane.

[0015] The first and second angles of inclination can then be set, for example, during the manufacture or configuration of the floor cleaning machine. In principle, such an adjustment can also be made during a maintenance procedure. Furthermore, it is generally possible for an operator to adjust the first and second angles of inclination to suit their specific cleaning task. This provides a high degree of flexibility for the floor cleaning machine.

[0016] In principle, it is also possible for the first pressure element or second pressure element to not act on the respective cleaning tool or to be in such a neutral state that the corresponding inclination angle is zero. In this example, no significant propulsion is then present. The solution according to the invention fundamentally includes this option for setting an inclination angle of zero.

[0017] It is particularly advantageous if the first pressure element acts on the first cleaning tool in such a way that a first rotational axis of the first cleaning tool rotates on a conical surface. The first cleaning tool then performs a type of precession. This allows for a simple and space-saving design on the drive side until a corresponding torque is coupled into the cleaning tool.

[0018] It is advantageous if at least one of the following is provided: the first pressure element acts continuously on the first cleaning tool and in particular forms a positive guide for the first cleaning tool; the second pressure element acts continuously on the second cleaning tool and in particular forms a positive guide for the second cleaning tool; the first pressure element comprises a roller and / or a sliding element for a contact area with the first cleaning tool; the second pressure element comprises a roller and / or a sliding element for contact with the second cleaning tool.

[0019] This allows a "permanent" inclination of the corresponding cleaning tool relative to the installation plane to be established in a structurally advantageous manner. A torque transmission device can be implemented with a spatially fixed rotation axis relative to the floor head.

[0020] If the first pressure element or the second pressure element has a roller or a sliding element for a contact area with the corresponding cleaning tool, friction losses due to the forced guidance of the cleaning tool on the corresponding pressure element can be kept to a minimum.

[0021] For the same reason, it is advantageous if at least one of the following is provided: a conical axis of the conical shell is coaxial with the first axis of rotation; a conical angle of the conical shell corresponds to an angle of inclination of the first cleaning tool to the installation plane; the first axis of rotation is spatially fixed.

[0022] In this way, propulsion can be easily achieved via the corresponding angle of inclination of the corresponding cleaning tool.

[0023] For the same reason, it is advantageous if the second pressure element acts on the second cleaning tool in such a way that a second axis of rotation of the second cleaning tool rotates on a conical surface, and in particular at least one of the following is provided: a conical axis of the conical surface is coaxial with the second axis of rotation; a conical angle of the conical surface corresponds to an angle of inclination of the second cleaning tool to the installation plane; the second axis of rotation is spatially fixed.

[0024] In particular, the first pressure element acts on an upper side of the first cleaning tool facing away from the installation plane, and / or the second pressure element acts on an upper side of the second cleaning tool facing away from the installation plane. This allows an angle of inclination to be easily adjusted and also fixed. The first pressure element and the second pressure element are in permanent contact with the corresponding cleaning tool on its upper side (at least if the angle of inclination is similar). The corresponding pressure element rolls or slides on the corresponding cleaning tool, with the cleaning tool rotating past the corresponding pressure element in a positively guided manner.

[0025] Furthermore, it is advantageous if at least one of the following is provided: by adjustable positioning of the first pressure element on the floor head, the first angle of inclination of the first cleaning tool relative to the installation plane can be set; by adjustable positioning of the second pressure element on the floor head, the second angle of inclination of the second cleaning tool relative to the installation plane can be set.

[0026] For example, during manufacturing or assembly, the propulsion can be adjusted by adjusting the inclination angle. This can also be done during maintenance of the floor cleaning machine. In principle, it is also possible for an operator to perform this adjustment (outside of a cleaning operation) to allow adaptation to the specific cleaning conditions or floor conditions.

[0027] A space-saving arrangement results when a distance between the first pressure element and the second pressure element in a transverse axis perpendicular to a forward travel direction of the ground head is smaller than a distance from the first pressure element to a first lateral side end of the ground head and / or a distance from the second pressure element to a second lateral side end of the ground head, wherein the first lateral side end in the transverse axis is closer to the first pressure element than the second lateral side end of the ground head. The pressure elements are thus arranged in a central region of the ground head relative to the lateral side ends. This allows the inclination to be easily adjusted with space-saving accommodation of the pressure elements and the mounting elements for the pressure elements.

[0028] A space-saving arrangement is achieved when the first pressure element and the second pressure element are located between a first belt drive and a second belt drive of a torque transmission device relative to a transverse axis of the base head, which is perpendicular to a forward direction of travel of the base head. The corresponding torque of a drive motor is transmitted to the first disc holder and the second disc holder via the belt drives. The belt drives can be arranged in a V-shape, for example. The space between the corresponding arms of the V-arrangement can be used to position the pressure elements.

[0029] It is particularly advantageous if the first pressure element and the second pressure element are connected to each other. This allows the angle of inclination of both the first cleaning tool and the second cleaning tool to be set and adjusted synchronously.

[0030] It is advantageous if at least one of the following is provided: the first pressure element and the second pressure element act synchronously on the respectively assigned cleaning tool; the first pressure element and the second pressure element cause the respectively assigned cleaning tool to have an inclination of the same magnitude to the installation plane; the first angle of inclination of the first cleaning tool to the installation plane and the second angle of inclination of the second cleaning tool to the installation plane have opposite orientations and are in particular of the same magnitude; the first cleaning tool and the second cleaning tool are arranged relative to one another such that, starting from the installation plane in a height direction perpendicular to the installation plane, a distance between the first cleaning tool and the second cleaning tool decreases, in particular towards a base head body of the base head.

[0031] A defined setting can be achieved with a defined propulsion at least approximately parallel to the forward direction of the floor head. In particular, the inclination of the first cleaning tool and the second cleaning tool, starting from a central region of the floor head between lateral side ends, is such that the distance between an effective surface (in particular the bristle ends) of the cleaning tool and the installation plane increases outward. This results in propulsion with good maneuverability and effective cleaning action.

[0032] In a structurally advantageous embodiment, a fixing device is pivotally mounted on the base head on a pivot bearing, on which the first pressure element and the second pressure element are located. A specific pivot position of the fixing device on the pivot bearing determines the first angle of inclination of the first cleaning tool and the second angle of inclination of the second cleaning tool relative to the installation plane. This allows for a simple setting of the corresponding angle of inclination and thus also the corresponding propulsion. In principle, this also allows for a simple adjustment of the propulsion by adjusting the angle of inclination.

[0033] A space-saving design results if at least one of the following is provided: the pivot bearing is arranged in the region of a front end of the ground head relative to a forward direction of travel of the ground head; relative to a transverse axis of the ground head, which is oriented transversely to a forward direction of travel of the ground head, the pivot bearing is located between the first disc holder and the second disc holder; the pivot bearing is seated on a ground head body of the ground head.

[0034] For the same reason, it is advantageous if at least one of the following is provided: a pivot axis of the pivot bearing is oriented parallel to the installation plane; a pivot axis of the pivot bearing is oriented transversely and in particular perpendicularly to a forward direction of travel of the ground head; a pivot axis of the pivot bearing is oriented parallel to a first pivot axis of the articulated device; a pivot axis of the pivot bearing is oriented transversely and in particular perpendicularly to the first axis of rotation and / or the second axis of rotation; a pivot axis of the pivot bearing is oriented parallel to a roller axis of the first pressure element and / or the second pressure element.

[0035] The corresponding mechanism for determining an angle of inclination for advancing the ground head can thus be integrated into the ground head in a space-saving manner.

[0036] In one embodiment, a base head body of the base head has a recess that is open toward the installation plane at least in the region of the first pressure element and the second pressure element, and at least a portion of the securing device is positioned in the recess. This results in a space-saving arrangement. The pressure elements can act on an upper side of the associated cleaning tool, which is positioned below the underside of the base head body, which faces the installation plane. Space is provided on the base head body, for example, for arranging a dirty fluid tank device with a large storage volume.

[0037] In one embodiment, the securing device is connected to an upper side of the floor head body, which faces away from the installation plane, and is connected to the floor head, in particular in the region of a rear end. This results in space-saving storage. The securing device can be easily accessed to adjust the appropriate angle of inclination.

[0038] In a structurally advantageous embodiment, the fixing device comprises at least one of the following: a fork element, via which the fixing device is pivotably mounted on the base head via the pivot bearing; a first web, which is connected to a fork element and on which the first pressure element and the second pressure element are seated, wherein in particular the first pressure element and the second pressure element are seated on opposite sides of the first web; a second web, which is connected to a first web, on which the first pressure element and the second pressure element are seated, and on which a fixing element for fixing a pivot position is arranged.

[0039] The fork element allows for a space-saving pivoting mounting of the fastening device. The first web allows the first pressure element and the second pressure element to be mounted on the fastening device. The second web allows for a specific pivoting position of the fastening device relative to a base head body to be fixed, and in particular, adjustable.

[0040] In a structurally advantageous embodiment, the second web is guided on or above an upper side of a base head body of the base head, with the upper side facing away from the installation plane. This results in a space-saving arrangement. The fixing device can be easily accessed from above the base head body, in particular to set a setting or change a setting to change propulsion.

[0041] It is particularly advantageous if at least one fixing element is assigned to the first pressure element and the second pressure element, by means of which a position of the first pressure element and / or the second pressure element on the base head is fixed. In particular, the at least one fixing element allows a relative height position of the pressure elements to the installation plane to be fixed and, in particular, adjustable. This determines a corresponding inclination position of the associated cleaning tool.

[0042] It is advantageous if at least one of the following is provided: the at least one fastening element is arranged between the articulated device and a rear end of the floor head with respect to a longitudinal axis of the floor head; the at least one fastening element is accessible from a rear end of the floor head via a free space on the floor head, in particular for adjusting a pivoting position of the fastening device relative to the floor head; the at least one fastening element is located between a first belt drive and a second belt drive with respect to a transverse axis of the floor head, which is oriented perpendicular to a forward travel direction of the floor head; the at least one fastening element is seated on a pivotable fastening device.

[0043] This results in a space-saving arrangement of at least one fixing element. The at least one fixing element can be accessed relatively easily, particularly with a tool or a fixed control element, thus enabling simple adjustment and, in particular, variable adjustment of the angle of inclination.

[0044] It is advantageous if at least one of the following is provided: the holding rod device is gimbal-mounted to the ground head by the joint device; the joint device comprises a first joint with a first pivot axis and a second joint with a second pivot axis, wherein the first pivot axis and the second pivot axis are oriented transversely and in particular perpendicular to one another and the first pivot axis is oriented parallel to the installation plane; a first pivot axis of the joint device is oriented transversely and in particular perpendicular to a forward travel direction of the ground head.

[0045] This allows for the creation of a floor cleaning machine that is easy to operate and highly maneuverable. In one embodiment, a dirty fluid tank for collecting dirty fluid and a blower device are arranged on the floor head. This keeps the flow paths for dirty fluid short. A center of gravity-optimized arrangement of components can be achieved.

[0046] It is particularly advantageous if the dirty fluid tank device has a cutout, wherein, when the dirty fluid tank device is positioned on the base head, the joint device is located at least partially within the cutout. It can also be provided, in particular, that, for example, a fixing element for determining a relative height position of the first pressure element and the second pressure element relative to the installation plane is located at least partially within the cutout.

[0047] It is particularly advantageous if a free space is arranged or formed on the floor head as a movement space for pivoting the support rod device relative to the floor head about a first pivot axis, wherein the first pivot axis is perpendicular to a forward direction of travel of the floor head. The free space can then also be used, for example, to access a fixing element, via which an angle of inclination of the corresponding cleaning tool relative to the installation plane can be set and locked.

[0048] In particular, the free space is a continuation of a section of a dirty fluid tank assembly when the dirty fluid tank assembly is attached to the base head, with a continuation line being perpendicular to a first pivot axis. This results in a space-saving arrangement. The corresponding components are also easily accessible.

[0049] In one embodiment, a removable tank for cleaning fluid is attached to the support rod. This results in optimized space utilization with an optimized center of gravity distribution. For the same reason, it is advantageous to attach a battery unit to the support rod. In particular, the battery unit is located below the tank for cleaning fluid. Furthermore, the base head can be designed with relatively low height dimensions, ensuring good underride capability.

[0050] In one embodiment, the battery device and a tank device for cleaning fluid are positioned on the same side of the support rod device. This results in good operability for an operator with high maneuverability.

[0051] A supply device is provided for supplying cleaning fluid from a tank device for cleaning fluid to a floor to be cleaned and / or to the first cleaning tool and / or to the second cleaning tool. This allows wet cleaning, in particular of a hard floor, to be performed.

[0052] Good operability and high maneuverability are achieved if the support rod device includes a handlebar which can be grasped by an operator with both hands.

[0053] In one embodiment, at least one suction bar is arranged on the floor head, which is fluidly connected to a blower device. The suction bar can be used to suction a dirty fluid from the floor, and the corresponding dirty fluid can be coupled into a dirty fluid tank device.

[0054] In particular, a drive motor is provided for the first disc holder and the second disc holder, and a torque transmission device is provided, which is torque-effectively coupled to the drive motor and ensures torque transmission to the first disc holder and the second disc holder. The torque transmission device preferably has a first gear, which is torque-effectively coupled to the first disc holder via a first toothed belt, and a second gear, which is torque-effectively coupled to the second disc holder via a second toothed belt.

[0055] In this solution, the torque transmission device comprises a transmission that is essentially designed in two stages: the first transmission section with a first gear and a belt drive with a first toothed belt, and the second transmission section with a second gear and a belt drive with a second toothed belt. Such a torque transmission device can be designed with compact dimensions and, in particular, with a high level of flatness. This results in optimized space utilization.

[0056] A drive for the torque transmission device can be mounted laterally on the first gear to save space, with the first gear then directly driving the second gear. This also allows for counter-rotation of the disc holders in a simple design.

[0057] By providing the first and second sections on the torque transmission device, a space on the base head between the first and second sections can also be used for structural purposes. For example, a holder for a joint device for linking the support rod device, or the joint device itself, can be positioned in this space.

[0058] The effective use of space on the base head makes it easy to position a tank device, such as a tank device for dirty fluid with a high storage volume, on the base head. It is particularly advantageous if the drive motor is coupled to the first gear and drives the first gear to rotate about a first axis of rotation, and the first gear is coupled to the second gear, wherein the second gear is driven to rotate about a second axis of rotation of the second gear by means of the first gear, and wherein the directions of rotation about the first axis of rotation and the second axis of rotation are opposite. A drive can be coupled into the torque transmission device via the first gear. Outputs are provided via the disc holders. The drive to the first gear, in turn, can be coupled laterally or alternatively, for example, centrally on the gear.This allows a space above the torque transmission device to be kept free with respect to the drive motor and used, for example, to position a tank device.

[0059] It is advantageous if at least one of the following is provided: the first axis of rotation of the first gear and the second axis of rotation of the second gear are parallel to one another; the first axis of rotation of the first gear and the second axis of rotation of the second gear are oriented transversely and in particular perpendicular to the installation plane; the first axis of rotation of the first gear is oriented parallel to or at an acute angle of at most 10° to a first axis of rotation of the first cleaning tool; the second axis of rotation of the second gear is oriented parallel to or at an acute angle of at most 10° to a second axis of rotation of the second cleaning tool. The parallel alignment of the first axis of rotation of the first gear and the second axis of rotation of the second gear results in a structurally favorable design with optimized use of space.The first rotational axis of the first gear and the second rotational axis of the second gear are aligned transversely to the mounting plane. This results in a structurally simple design. In particular, a vertical drive motor can be easily used. In principle, the first rotational axis and the second rotational axis can be positioned at an acute angle to the mounting plane. In a structurally advantageous embodiment, they are oriented perpendicular to the mounting plane.

[0060] In an advantageous embodiment, the first gear has a first active wheel and a first belt wheel, which are connected to one another in a rotationally fixed manner with the first axis of rotation of the first gear as the common axis of rotation, and the second gear has a second active wheel and a second belt wheel, which are connected to one another in a rotationally fixed manner with the second axis of rotation of the second gear as the common axis of rotation, and the first active wheel is directly coupled to the second active wheel, and the first toothed belt is guided on the first belt wheel, and the second toothed belt is guided on the second belt wheel. This makes it easy to create a torque transmission device with small height dimensions. A two-stage transmission can be implemented for each cleaning tool.In particular, it is provided that a torque is coupled via the first active gear from a drive motor (electric motor), and the second active gear is then directly coupled to the first active gear via a corresponding tooth engagement and is then driven directly via the first gear. The first gear, in turn, forms a belt drive for the first disc holder via the first pulley. In the same way, the second gear and the second pulley form a belt drive for the second disc holder.

[0061] In particular, the drive motor is (directly) torque-effectively coupled to the first active gear via a pinion. A drive side for the torque transmission device, to which the torque of the drive motor is applied, is then formed on the first active gear.

[0062] It is particularly advantageous if all rotational axes of the torque transmission device are aligned parallel to one another, and in particular, if a drive axis of the drive motor is aligned parallel to these rotational axes. This allows for a torque transmission device with low height dimensions. This results in optimized space utilization and, in particular, allows a tank device to be positioned above the torque transmission device on the base head. The drive motor can be positioned outside this space for the tank device, effectively coupling torque into the torque transmission device.

[0063] It is particularly advantageous if the first gear and the second gear lie in a common plane with respect to a respective underside and / or a respective top side, which plane is in particular parallel to the installation plane. This results in optimized space utilization. In principle, it is possible for this plane to be oriented at a "small" acute angle to the installation plane, in which case, in particular, a rotational axis of the cleaning tool is coaxial with a rotational axis of the associated disc holder. If this plane is parallel to the installation plane, then it is particularly provided that the rotational axis of the corresponding cleaning tool is at an acute angle to the rotational axis of the associated disc holder.

[0064] Advantageously, the drive motor has a drive axis with at least one of the following: the drive axis is oriented transversely and in particular perpendicularly to the installation plane; the drive axis is oriented parallel to a first axis of rotation of the first gear; the drive axis is oriented parallel to a second axis of rotation of the second gear; the drive axis is spaced apart and in particular parallel to a first axis of rotation of the first gear and a second axis of rotation of the second gear.

[0065] If the drive axis is oriented transversely and, in particular, perpendicularly to the installation plane, the drive motor can be mounted vertically on the base head. This results in optimized space utilization. In particular, a large space can be provided for positioning a tank system. The tank system can then, in turn, be designed with a large storage volume.

[0066] If the drive axis is parallel to a first rotational axis of the first gear and / or a second rotational axis of the second gear, a simplified structural design results. In particular, the torque of the drive motor can be easily coupled to the first gear, for example, by providing a pinion as a spur gear for coupling to the first gear.

[0067] By spacing the drive axis from a first axis of rotation of the first gear, the torque can be coupled laterally into the torque transmission device, in particular via a stationary drive motor. This provides a usable space above the torque transmission device, which can be used in particular for a tank device. It is advantageous if projections of the first axis of rotation of the first disc holder, the second axis of rotation of the second disc holder, the first axis of rotation of the first gear, and the second axis of rotation of the second gear onto the installation plane form a quadrilateral and in particular a trapezoid, and if a projection of the drive axis onto the installation plane lies outside the quadrilateral or at an edge of the quadrilateral. This results in optimized use of space.A vertical drive motor can be positioned on the base head, and a corresponding space is provided for the provision of a tank device with a large storage volume.

[0068] For the same reason, it is advantageous if the torque transmission device encloses a space with the first gear, the second gear, the first disc holder and the second disc holder, and the drive motor is positioned outside this space or at the edge of this space and, in particular, is coupled laterally to the torque transmission device in a torque-effective manner.

[0069] In one embodiment, a tank device is arranged above the space, at least in a partial area, relative to a vertical axis of the floor head. This results in optimized use of space at the floor head, which in turn can then be used for positioning, in particular, a removable tank device, such as a tank device for dirty fluid.

[0070] In one embodiment, a cover of the torque transmission device has a flat upper surface, which is particularly parallel to the installation plane. This results in optimized use of space at the base head, for example, to accommodate a tank device.

[0071] It is advantageous if at least one of the following is provided: a tank device is positioned, in particular removable, above a cover of the torque transmission device relative to a vertical axis of the base head; the cover forms a support surface for a tank device.

[0072] A simpler construction is achieved if, for example, the cover can also be used as a support surface for the tank equipment.

[0073] From a manufacturing point of view, it is advantageous if the first timing belt and the second timing belt are designed identically.

[0074] Furthermore, it is advantageous if the first timing belt and the second timing belt are each guided geometrically torsion-free on the torque transmission device. This prevents twisting in the timing belt. The corresponding timing belt thus has a long service life. In particular, the design is such that the axes of rotation for a belt drive with the first timing belt and the second timing belt have the same orientation.

[0075] Furthermore, it is advantageous if the first toothed belt and the second toothed belt are guided in the same plane relative to a respective underside and / or a respective top side, which is in particular parallel to the installation plane. This results in optimized space utilization at the base head.

[0076] It is provided that the floor head has a front end, a rear end facing away from the front end, a first side end and a second side end, with at least one of the following: the first disc holder and the second disc holder are located in the region of the front end; the first gear is at a greater distance from the first side end than the first disc holder; the second gear is at a greater distance from the second side end than the second disc holder; the first gear and the second gear are closer to the rear end than the first disc holder and the second disc holder; the first gear is closer to the rear end than the second gear; a drive axis of the drive motor is closer to the rear end than a first axis of rotation of the first gear; a drive axis of the drive motor is closer to the first side end than a first axis of rotation of the first gear.

[0077] This results in optimized use of space at the base head.

[0078] It is also advantageous if the first gear and the second gear differ in the number of teeth relative to the coupling, with the difference being preferably one. This has been shown to reduce noise.

[0079] It is advantageous if the first disc element and the second disc element are on the same plane with respect to their respective underside and / or top side. This results in optimized space utilization at the base head. The transmission gear (transmission device) can be designed to be "flat."

[0080] It is particularly advantageous if the torque transmission device is designed to be flat, with a first envelope plane on a bottom side of the torque transmission device and a second envelope plane on a top side of the torque transmission device, wherein the bottom side faces the installation plane, and wherein the first envelope plane and the second envelope plane are parallel to one another and, in particular, parallel to the installation plane. This results in optimized use of space at the base head. A space above the torque transmission device can be used, for example, to position a tank device.

[0081] It is advantageous if the base head has a first region where the torque transmission device is located and a second region where the drive motor is located. The second region is positioned in a region of a rear end of the base head and is oriented transversely to the first region. A free space is formed between the first region and the second region to accommodate a tank device. This results in optimized use of space on the base head. A tank device with a relatively large storage volume can be used.

[0082] It is then further advantageous if a holder for linking the holding rod device is located in the first area, with the first gear and the second gear being positioned in an area between the holder and a rear end of the ground head. This results in optimized space utilization. In a sense, the torque transmission device (the gear) is built around the holder on a ground head body (tool deck) of the ground head.

[0083] Furthermore, it is advantageous if channels or a cover of the torque transmission device have a V-shaped configuration in a plan view with a first arm and a second arm which are oriented at an acute angle to one another, with the holder being positioned between the first arm and the second arm. This results in optimized use of space. In particular, the holder can then be positioned between the first arm and the second arm on the base head. Torque can be coupled into the torque transmission device in a connecting region between the first arm and the second arm. A corresponding space in the region of this connecting region can be used on the base head for positioning a drive motor, and in particular a stationary drive motor.

[0084] According to the invention, a method of the type mentioned at the outset is provided, in which the first cleaning tool is mounted on the first disc holder with play, the second cleaning tool is mounted on the second disc holder with play, and in which the first cleaning tool and the second cleaning tool are each forced to rotate in such a way that a first axis of rotation for the rotation of the first cleaning tool rotates around a conical surface and a second axis of rotation for the rotation of the second cleaning tool rotates around a conical surface.

[0085] The method according to the invention has the advantages already explained in connection with the floor cleaning machine according to the invention.

[0086] In particular, the floor cleaning machine according to the invention can be operated with the method according to the invention or the method according to the invention can be carried out on the floor cleaning machine according to the invention.

[0087] It is advantageous if the support rod assembly and the joint assembly are gimbal-mounted on the ground head. This results in high maneuverability.

[0088] It is also advantageous if the positive guide for the first cleaning tool is such that it is inclined toward the installation plane, and the positive guide for the second cleaning tool is such that it is inclined relative to the installation plane. This allows propulsion to be generated effectively, and a torque transmission device (a gear device) for transmitting torque from the drive to the disc holders can be designed in a structurally advantageous manner.

[0089] In particular, the first angle of inclination of the first cleaning tool relative to the installation plane and / or the second angle of inclination of the second cleaning tool relative to the installation plane can be variably set. This allows for flexible adaptation to the respective cleaning conditions.

[0090] The following description of preferred embodiments, taken in conjunction with the drawings, serves to further explain the invention. They show:

[0091] Figure 1 is a partial side view of an embodiment of a floor cleaning machine according to the invention (without articulation device and with the housing partially removed);

[0092] Figure 2 is a perspective view of the floor cleaning machine according to Figure 1, wherein a dirt fluid tank device is removed from a floor head (in comparison to Figure 1, the joint device is shown and the housing is complete in the area of ​​a battery device);

[0093] Figure 3 is an enlarged view of the base head according to Figure 2;

[0094] Figure 4 shows a further partial view of the floor cleaning machine according to Figure 1;

[0095] Figure 5 shows a further partial view of the floor cleaning machine according to Figure 1; Figure 6 shows a partial view of the floor cleaning machine in the area of ​​a support rod device with the housing removed (similar to Figure 1);

[0096] Figure 7 is a plan view in the direction A according to Figure 6;

[0097] Figure 8 is a sectional view of a portion of the floor cleaning machine of Figure 1 taken along line 8-8 of Figure 7;

[0098] Figure 9 is a sectional view taken along line 9-9 of Figure 1;

[0099] Figure 10 is a partial perspective view of a floor head of the floor cleaning machine according to Figure 1 with the dirt fluid tank device removed and other removed components;

[0100] Figure 11 is a view of the bottom head according to Figure 10 in the direction

[0101] B (from below) with torque transmission device removed;

[0102] Figure 12 shows another view of the base head according to Figure 10;

[0103] Figure 13 is an enlarged view of area C according to Figure 12;

[0104] Figure 14 is a sectional view of the base head according to Figure 10 in a

[0105] Plane containing the section line 14-14 according to Figure 10;

[0106] Figure 15 is a perspective view of an embodiment of a securing device arranged on the floor head according to Figure 10 (see Figure 11); Figure 16(a), (b) is a view of a first embodiment of a cleaning tool;

[0107] Figure 17(a), (b) is a view of a second embodiment of a cleaning tool;

[0108] Figure 18 is a partial front view of the floor head according to Figure 10, in which cleaning tools are at a first angle of inclination to a mounting plane; and

[0109] Figure 19 shows the same view as Figure 18, wherein the cleaning tools are oriented at a greater angle of inclination to the installation plane than in the illustration according to Figure 18.

[0110] An embodiment of a floor cleaning machine according to the invention, which is shown in the figures and designated by 10, is used in particular for cleaning hard floors. It comprises a floor head 12 and a support rod device 14. The support rod device 14 is hinged to the floor head 12 via a hinge device 16 (see Figures 2 and 3).

[0111] Cleaning tools are arranged on the floor head 12. This will be described further below. The support rod device 14 serves to guide the floor cleaning machine 10 across a walkable floor 18 (see Figure 2) by a standing operator who stands on the floor 18 and faces an operator side 20 (see Figure 2) of the floor cleaning machine 10 and, in particular, the support rod device 14.

[0112] The floor head 12 comprises a floor head body 22. The floor head body 22 has a bottom side 24 and a top side 26. A support plane 28 is assigned to the floor head 12. The support plane 28 is defined by a plurality of support wheels 30 and the cleaning tools. During operation of the floor cleaning machine 10, the floor cleaning machine 10 is supported on the floor 18 to be cleaned via the floor head 12 as a whole, via the support wheels 30 (Figures 1 and 4) and the cleaning tools. If the floor 18 is level, then during cleaning operation of the floor cleaning machine 10, the support plane 28 coincides with the floor 18.

[0113] The underside 24 of the base head body 22 faces the installation plane 28.

[0114] The floor head 12 has a front end 32 and a rear end 34 on the floor head body 22. It also has a first side end 36 and an opposite second side end 38. Between the front end 32 and the rear end 34, the floor head 12 (the floor head body 22) has a longitudinal axis 40. The longitudinal axis 40 is in particular parallel to a forward travel direction 42 of the floor head 12 (the floor cleaning machine 10) in a cleaning operation.

[0115] The base head 12 (the base head body 22) is assigned a transverse axis 44 which is perpendicular to the longitudinal axis 40.

[0116] The base head 12 (the base head body 22) is also assigned a height axis 46 (Figure 1). The height axis 46 is perpendicular to the installation plane 28. The longitudinal axis 40 and the transverse axis 44 are each perpendicular to this height axis 46.

[0117] During operation of the floor cleaning machine 10, the operator is positioned behind the rear end 34 of the floor head 12 and faces the operator side 20.

[0118] A first disk holder 48 and a second disk holder 50 are mounted on the base head 12. The first disk holder 48 is mounted on the base head body 22 for rotation about a first axis of rotation 52. The first axis of rotation 52 is oriented transversely to the installation plane 28. The second disk holder 50 is mounted on the base head body 22 for rotation about a second axis of rotation 54. The second axis of rotation 54 is oriented transversely to the installation plane 28.

[0119] A first cleaning tool 56 is mounted on the first disc holder 48. It is rotatable via the rotation of the first disc holder 48. A second cleaning tool 58 is mounted on the second disc holder 50. The second cleaning tool 58 is rotatable via the second disc holder 50.

[0120] It is intended that the first cleaning tool 56 and the second cleaning tool 58 rotate in opposite directions to each other.

[0121] In one embodiment, the first cleaning tool 56 and the second cleaning tool 58 are inclined with an effective plane relative to the installation plane 28. A typical angle of inclination is, for example, in the range between 1° and 10°, and in particular in the range between 1° and 5°. This generates propulsion during cleaning operation of the floor cleaning machine 10, with the arrangement being such that propulsion is generated in the forward travel direction 42. This facilitates guidance and maneuvering for an operator over a floor 18 to be cleaned.

[0122] This inclination of the effective plane relative to the installation plane 28 can generally be achieved by orienting the first rotation axis 52 and the second rotation axis 54 at a corresponding acute angle to the installation plane 28. Corresponding axes of rotation of the first cleaning tool 56 and the second cleaning tool 58 then coincide with the first rotation axis 52 and the second rotation axis 54, respectively.

[0123] In an alternative embodiment, the associated rotational axis of the first cleaning tool 56 rotates on a conical surface with the first rotational axis 52 as the conical axis, and the associated rotational axis of the second cleaning tool 58 rotates on a conical surface with the second rotational axis 54 as the conical axis. The inclination angles of the effective planes correspond to the conical angles of the conical surface. This is described below.

[0124] An effective area of ​​the first cleaning tool 56 and an effective area of ​​the second cleaning tool 58 (indicated in Figure 1 by the reference numeral 60) protrude from the floor head body 22 with respect to the underside 24, so that they can act on a floor 18 to be cleaned.

[0125] The first cleaning tool 56 and the second cleaning tool 58 are each designed as a disc tool, in particular as a scrubbing disc. In one embodiment, the first cleaning tool 56 and the second cleaning tool 58 are each brush tools, and the effective area 60 is accordingly formed by the effective area of ​​brushes (bundles of bristles).

[0126] In principle, it is also possible for the first cleaning tool 56 or the second cleaning tool 58 to have textile active areas or for a cleaning tool 56, 58 to have both brush active areas and textile active areas.

[0127] The floor head body 22 has a first corner region 62 at the rear end 34 toward the second side end 38. It has a second corner region 64 at the first side end 36 at the rear end 34. A drive device for the disc holders 48, 50 is arranged at the second corner region 64. This drive device comprises one, and in particular precisely one, drive motor 66.

[0128] In one embodiment, the drive motor 66 (see Figure 4) is arranged vertically on the ground head body 22; it has a motor axis 68 (drive axis 68) oriented parallel or at a small acute angle (in particular less than or equal to 10°) to the vertical axis 46. The motor axis 68 is oriented transversely and in particular perpendicularly or at an angle of less than or equal to 10° to the installation plane 28.

[0129] A torque transmission device 70 is coupled to the drive motor 66 in a torque-effective manner. The torque transmission device 70 transmits the torque of the drive motor 66 to the first disc holder 48 and the second disc holder 50, and thus to the cleaning tools 56, 58.

[0130] The torque transmission device 70 is positioned on the upper side 26 of the base head body 22.

[0131] In one embodiment, the torque transmission device 70 includes a first gear 72 which is directly coupled to the drive motor 66 and is driven in rotation directly by the drive motor 66.

[0132] The first disc holder 48 is torque-effectively connected to the first gear 72 via a first belt drive 74.

[0133] A second gear 76 is also provided, which is torque-effectively coupled to the first gear 72. The second gear 76 is directly driven in its rotational movement by the first gear 72.

[0134] The second disc holder 50 is torque-effectively coupled to the second gear 76 via a second belt drive.

[0135] This design of the torque transmission 70 causes the first disk holder 48 and the second disk holder 50 to rotate in opposite directions, with a single drive motor 66 provided for this purpose at the second corner region 64. The torque transmission device 70 is flat. It is positioned in a gear housing 80 (see Figure 3), which is positioned on the top side 26 of the base head body 22.

[0136] The transmission housing 80 comprises a first branch 82, in which the first belt drive 74 is positioned, and a second branch 84, in which the second belt drive 78 is positioned. This second branch 84 is indicated in Figure 4.

[0137] A free space 86 (see, for example, Figure 3) lies between the first branch 82 and the second branch 84. The joint device 16 is mounted in this free space 86 on the base head body 22 and connected thereto.

[0138] In one embodiment, a strip 87 is located on the ground head body 22 in front of the front end 32. This strip 87 defines the frontmost region of the ground head 12 relative to the forward direction of travel 42. It represents a type of bumper to prevent or cushion the ground head 12 from striking objects, walls, etc. The strip 87 is, in particular, made of an elastic material and / or is elastically mounted.

[0139] The joint device 16 is designed as a column and extends away from the base head body 22 in a direction parallel to the vertical axis 46. It is firmly connected to the base head body 22.

[0140] In one embodiment, the joint device 16 comprises a first holder 88. This first holder 88 is mounted on the base head body 22.

[0141] A first joint 90 is located on the first holder 88. The first joint 90 is a pivot joint with a first pivot axis 92. The first pivot axis 92 is parallel to the installation plane 28. It is transverse and in particular perpendicular to the longitudinal axis 40. It is parallel to the transverse axis 44. It is transverse and in particular perpendicular to the vertical axis 46. It is transverse and in particular perpendicular to the forward direction of travel 42.

[0142] The first joint 90 enables the holding rod device 14 to be pivoted relative to the floor head 12, by means of which a distance of the operator side 20 from the floor 18 can be varied.

[0143] A second holder 94 is located on the first joint 90. A second joint 96 is located on the second holder 94.

[0144] The second joint 96 is a pivot joint with a second pivot axis 98. The second pivot axis 98 is transverse and in particular perpendicular to the first pivot axis 92.

[0145] The second joint 96 is connected to the first joint 90 in a rotationally fixed manner with respect to the first pivot axis 92, so that it follows the pivoting movement about the first pivot axis 92.

[0146] Relative to the height axis 46, the second joint 96 is positioned above the first joint 90.

[0147] The second joint 96 is pivotally connected to the holding rod device 14.

[0148] The holding rod device 14 is thereby pivotable on the joint device 16 about the second pivot axis 98 and about the first pivot axis 92 relative to the floor head 12.

[0149] Due to the pivotability about the first joint 90, the orientation of the second pivot axis 98 relative to the installation plane 28 changes. The second pivot axis 98 moves within a plane that is perpendicular to the installation plane 28. The position of the first pivot axis 92 relative to the installation plane 28 remains unchanged.

[0150] The joint device 16 provides a cardanic joint for linking the holding rod device 14 to the base head 12.

[0151] The first holder 88 is seated on the bottom head body 22 closer to the front end 32 than to the rear end 34.

[0152] In one embodiment, the first holder 88 is spaced apart from the front end 32 along the longitudinal axis 40.

[0153] The first holder 88 is located in particular centrally between the first side end 36 and the second side end 38.

[0154] A blower device 100 is arranged on the bottom head body 22.

[0155] The blower device 100 is located at the first corner region 62 (see Figure 4).

[0156] The blower device 100 comprises a blower motor and at least one impeller.

[0157] During operation of the floor cleaning machine 10, the blower device 100 generates a suction flow for sucking in a dirty fluid.

[0158] Dirt fluid is defined here as a fluid that can flow and be carried along in a suction stream. The dirt fluid can be liquid or dry.

[0159] A suction bar 102 (see, for example, Figure 4) is arranged on the floor head body 22. This is positioned in the region of the rear end 34. During cleaning operation of the floor head 12, the suction bar 102 rests against the floor 18 to be cleaned. It is positioned behind the cleaning tools 56 and 58 with respect to the forward direction of travel 42.

[0160] The blower device 100 is in fluid communication with the suction bar 102, which is acted upon by a suction flow.

[0161] A dirty fluid fleet on the floor 18 behind the cleaning tools 56, 58 can then be sucked off via the suction bar 102 and the sucked-off dirty fluid is coupled into a dirty fluid tank device 104.

[0162] The blower device 100, which is located at the first corner region 62, and the drive motor 66, which is located at the second corner region 64, are spaced apart from each other relative to the transverse axis 44. A free space 106, which will be described in more detail below, lies between them.

[0163] A first column device 108 is seated on the base head body 22 with an extension in an extension direction parallel to the height axis 46. The first column device 108 comprises the blower device 100. It comprises a first column housing 110 in which the blower device 100 is positioned.

[0164] Furthermore, a second column assembly 112 is arranged on the base head body 22 at the second corner region 64. This assembly comprises a second column housing 114. The second column assembly 112 comprises the drive motor 66, which is positioned in the second column housing 114.

[0165] Furthermore, a third column device 116 is positioned on the base head body 22, which is spaced apart from the first column device 108 and spaced apart from the second column device 112. The third column device 116 is the joint device 16. The third column device 116 is located, as already mentioned above, centrally between the first side end 36 and the second side end 38.

[0166] The free space 106, which is also a free space between the first column device 108 and the second column device 114 in the region of the rear end 34, is a movement space for the holding rod device 14, in particular when pivoting about the first pivot axis 92.

[0167] The joint device 16 is designed such that it can be moved in the free space 106, in particular with the second holder 94 and the second joint 96.

[0168] This allows for small angles to be achieved between the support rod assembly 14 and the floor 18. This results in particularly good clearance under fittings or the like. At a small angle to the floor 18, the overall height of the device along the vertical axis 46 is determined by the height of the floor head 12.

[0169] In a side view, the base head 12, with the dirty fluid tank device 104 removed, has an L-shaped configuration with the base head body 22 and the column devices 108, 112 projecting transversely thereto.

[0170] The first column assembly 108, the second column assembly 112, and the third column assembly 116 lie on a triangle 118 (see Figure 2). The triangle 118 has a base 120, on which the first column assembly 108 and the second column assembly 112 lie. The triangle 118 has a vertical axis perpendicular to the base 120, which is in particular parallel to the longitudinal axis 40. The third column assembly 116 lies on this vertical axis.

[0171] The triangle 118 is isosceles. The range of motion for pivoting the support rod device 14 about the first pivot axis 92 lies on the vertical axis of the triangle 118.

[0172] The second pivot axis 98 lies in a plane which contains this height axis and is perpendicular to the installation plane 28.

[0173] The dirty fluid tank device 104 is a unit that can be removed as a whole from the floor head 12 and fixed to the floor head 12. It collects dirty fluid sucked in by the blower device 100, which is sucked away in particular from the floor 18 to be cleaned.

[0174] In one embodiment, a separator is integrated into the dirty fluid tank device 104.

[0175] The dirty fluid tank assembly 104 includes a container 122 and an openable lid 124. In particular, the lid 124 is removable as a whole from the container 122 to allow a large access area to the container 122.

[0176] In one embodiment, the lid 124 is fixed to the container 122 with a releasable snap connection 126.

[0177] The dirty fluid tank device 104 has a bottom side 128. This lies on the container 122. When the dirty fluid tank device 104 is fixed to the base head 12, the bottom side 129 of the dirty fluid tank device 104 faces the top side 26 of the base head body 22.

[0178] The dirty fluid tank assembly 104 further has a top surface 130, which faces away from the bottom surface 128. The top surface 130 lies against the cover 124.

[0179] The dirty fluid tank device 104 further has a front side 132 and a rear side 134 facing away from the front side. When the dirty fluid tank device 104 is fixed to the base head 12, the rear side 134 faces the first column device 108 and the second column device 112. The front side 132 is located at the front end 32 of the base head 12 and, in one embodiment, forms a portion of the front end 32.

[0180] Between the front side 132 and the rear side 134, the dirty fluid tank assembly 104 has a first lateral side 136 and an opposite second lateral side 138.

[0181] The first lateral side 136 is located at the first side end 36 and the second lateral side 138 is located at the second side end 38 of the bottom head 12 when the dirty fluid tank device 104 is fixed to the bottom head 12.

[0182] The external shape of the dirty fluid tank device 104 is adapted to the shape of the base head 12 with the base head body 22. In one embodiment (see Figure 9), the first lateral side 136 is set back toward the first side end 36. The same applies to the second lateral side 138 toward the second side end 38. As a result, a region 139 (Figure 9) is formed between the base head body 22 and the dirty fluid tank device 104 on the base head body 22. This allows for improved underride capability.

[0183] Relative to the outer envelope, the dirty fluid tank device 104 has at least approximately a cuboid shape.

[0184] A handle 140 is arranged on the container 122, particularly directly below the lid 124. This handle is mounted on a pivot bearing 144, pivotable about a pivot axis 142.

[0185] In one embodiment, the pivot bearing 144 comprises parts located on the first lateral side 136 and the second lateral side 138. When the dirty fluid tank device 104 is fixed to the floor head 12, the pivot axis 142 is parallel to the first pivot axis 92 of the joint device 16. It is parallel to the installation plane 28.

[0186] The pivot axis 142 is oriented transversely to the first lateral side 136 and transversely to the second lateral side 138.

[0187] The handle bar 140 comprises opposing webs 146a, 146b, each of which is connected to the pivot bearing 144. The webs 146a, 146b are connected to each other via a connecting web 148.

[0188] The handle bar 140 has a U-shaped configuration, with the webs 146a, 146b corresponding to upstrokes of the U.

[0189] The connecting web 148 is positioned on the front side 132 of the dirty fluid tank device 104 in the non-pivoted position of the handle bar 140 (see Figure 3).

[0190] A grip recess 150 is arranged on the front side 132 of the container 122 (and / or the lid 124). Through the grip recess 150, an operator can access the connecting web 148 and thus the handle bar 140 in order to pivot it about the pivot axis 142.

[0191] In one embodiment, the container 122 has a groove 152. When not pivoted, the handle bar 140 is positioned in this groove 152 in a somewhat recessed manner, so that it does not protrude or significantly protrude beyond the front side 132 and the lateral sides 136, 138.

[0192] When the dirty fluid tank device 104 is fixed to the base head 12 (see Figure 1), the pivot bearing 144 is spaced apart from the installation plane 28 in the vertical axis 46. The pivot bearing 144 is positioned in the region of the joint device 16 on the base head 12. The dirty fluid tank device 104 with the handle bar 140 is arranged and designed such that an operator, when the dirty fluid tank device 104 is fixed to the base head 12, after pivoting the handle bar 140 upwards, can pull the dirty fluid tank device 104 in a direction 154 (see Figure 1) upwards and forwards away from the base head 12 and can thus remove it from the base head 12.

[0193] The dirty fluid tank device 104 has a cutout 156 which is adapted to the joint device 16 and its position on the base head body 22. When the dirty fluid tank device 104 is inserted on the base head 12, the cutout 156 corresponds to the free space 106.

[0194] The cutout 156 is continuous between the bottom 128 and the top 130 of the dirty fluid tank device 104. It is open towards the rear 134.

[0195] The cutout 156 is arranged on both the lid 124 and the container 122.

[0196] The dirty fluid tank device 104 comprises a first web region 158. The first lateral side 136 is located on the first web region 158. The dirty fluid tank device 104 further comprises a second web region 160. The second lateral side 138 is located on the second web region 160. The first web region 158 and the second web region 160 are spaced apart from one another.

[0197] The back side 134 lies on the first web area 158 and the second web area 160.

[0198] The dirty fluid tank assembly 104 further includes a third web portion 162. The third web portion 162 is oriented transversely to the first web portion 158 and the second web portion 160. It is connected to both the first web portion 158 and the second web portion 160.

[0199] The dirty fluid tank device 104 has at least approximately the shape of a U due to the web regions 158, 160, 162, wherein the first web region 158 and the second web region 160 correspond to upstrokes of the U.

[0200] The web areas 158, 160, 162 encompass both the container 122 and the lid 124.

[0201] The cutout 156 is formed between the first web region 158 and the second web region 160 and the third web region 162. The third web region 162 forms a boundary of the cutout 156 toward the front side 132.

[0202] A receiving volume for dirty fluid is formed within the web areas 158, 160, 162 and at the container part 122 of these web areas 158, 160, 162.

[0203] A connection 164 for the fluid-effective connection of the blower device 100 is arranged on the second web region 160.

[0204] In one embodiment, a mating connection 166 of the blower device 100, which is positioned on the base head body 22, lies on an inclined surface 168 (see Figure 3). The second web region 160 is provided in the region of the connection 164 with a correspondingly adapted inclined surface 170, on which the connection 164 lies.

[0205] When the dirty fluid tank device 104 is properly inserted into the base head 12, the mutually matched inclined surfaces 170, 168 automatically create a fluid-effective connection between the connection 164 and the mating connection 166 with corresponding fluid tightness. An overlap region 172 is arranged on the first web region 158. When the dirty fluid tank device 104 is seated on the base head 12, the first web region 158 is aligned with the second column device 112. The overlap region 172 covers a partial region of the second column housing 114. A transition 174 (see Figure 1) from the dirty fluid tank device 104 to the second column housing 114 is flush and, in particular, edge-free (see Figure 1) when the dirty fluid tank device 104 is seated on the base head 12.

[0206] Accordingly, the second web region 160 is provided with an overlap region 176, which covers a partial region of the first column housing 110, on which in particular the counter connection 166 is located, in order to achieve an edge-free transition or a flush transition.

[0207] When the dirty fluid tank device 104 is fixed to the floor head 12, the hinge device 16 is positioned in the cutout 156.

[0208] The cutout 156 makes it possible to insert the dirty fluid tank device 104 in a direction 178 (see Figure 2), which includes a directional component parallel to the longitudinal axis 40 and from the front end 32 to the rear end 34, onto the floor head body 22 and to slide it over the joint device 16.

[0209] When the dirty fluid tank device 104 is fixed to the floor head 12, the cutout 156 continues from the joint device 16 to the rear end 34 to the free space 106 in order to provide the freedom of movement for the pivotability of the holding rod device 14 on the joint device 16.

[0210] The dirty fluid tank device 104 has a relatively large storage volume and is adapted to the design of the base head body 22 with the column devices 108, 112, and 116 (of the joint device 16). The dirty fluid tank device 104 can be inserted into the base head body 22 with a component parallel to the direction 178 and can be removed in an opposite direction, particularly in the direction 154 (which has a component antiparallel to the direction 178 and a component parallel to the height axis 46).

[0211] The base head body 22 with its upper side 26 and in particular the gear housing 80 forms a contact surface and a holding surface for fixedly holding the dirty fluid tank device 104 on the base head 12. These contact areas / holding areas provide, in particular, downward support relative to the vertical axis 46.

[0212] The first column device 108 and the second column device 112 form a contact area / holding area with respect to the rear end 34.

[0213] In particular, a positive and / or non-positive connection is provided, by which the dirty fluid tank device 104 is fixed to the base head 12, which requires a certain amount of force after the fixation in order to be able to remove the dirty fluid tank device 104 in the direction 154 from the base head 12 and in particular to avoid unintentional detachment.

[0214] The support rod device 14 comprises a support rod 180. The support rod 180 has a longitudinal axis 182. It is connected distally to the joint device 16 and thereby connected to the second joint 96.

[0215] Proximally on the support rod 180 there is a handlebar 184 for an operator.

[0216] In one embodiment, the height of the support rod assembly 14 is adjustable as the distance between a proximal end of the support rod 180 and the link 184, in particular via a movable link. The link 184 has arms 186a, 186b. These can be grasped by an operator with the gripping hands.

[0217] A display and / or operating device 188 is arranged between the arms 186a, 186b.

[0218] A housing device, designated as a whole by 190, is mounted on the support rod 180. In the described embodiment, the support rod 180 is connected to the joint device 16, and the housing device 190 is held by the support rod 180. The support rod 180 is therefore an essential structural component of the floor cleaning machine 10.

[0219] It is also possible, in principle, for the housing assembly 190 to be connected to the joint assembly 16, and for a corresponding support rod to be attached to the housing assembly. In this example, the housing assembly is the essential structural component ("backbone") of the floor cleaning machine 10.

[0220] The housing device 190 is positioned between the link 184 and the second joint 96. It is designed such that it does not significantly restrict the mobility of the support rod device 14 relative to the base head 12.

[0221] A battery device 192 is located on the holding rod device 14. The battery device 192 is positioned above the floor head 12.

[0222] In one embodiment, the battery device 192 is mounted on a holder 194. The holder 194 is connected to the support rod 180.

[0223] The support rod 180 has a side 196 facing the operator side. The battery device 192 is located on a side 198 facing away from the side 196.

[0224] When the support rod assembly 14 is positioned upright (see Figure 1), the battery assembly 192 faces forward. The housing assembly 190 includes a housing portion 200 within which the battery assembly 192 is positioned in a protected manner. (In Figure 1, this housing portion 200 is removed.)

[0225] The housing part 200 is closed both laterally and on a bottom side 202 towards the base head 12.

[0226] A tank device 206 for cleaning fluid is removably mounted on a holder 204 (see Figure 9) on the support rod device 14. The cleaning fluid is, in particular, pure water, optionally with a surfactant additive.

[0227] The tank device 206 is removably mounted on the support rod device 14 between the underside 202 of the housing device 190 and the handlebar 184. The tank device 206, like the battery device 192, is mounted on the side 198 and faces away from the operator side 20.

[0228] At least a portion 208 of it is positioned above the battery device 192.

[0229] The tank assembly 206 is a unit that can be removed as a whole from the floor cleaning machine 10 (from the support rod assembly 14 and thereby from the holder 204). It has a bottom side 202 facing the floor head 12.

[0230] The tank device 206 has a cutout 210 in the area of ​​the underside 202, which is positioned below the partial area 208. The cutout 210 is designed such that a partial area of ​​the battery device 192 can be immersed into it.

[0231] In the area of ​​the cutout 210, the tank device 206 has a first web area 212, a second web area 214 opposite the first web area, and a third web area 216 which is connected to the first web area 212 and the second web area 214.

[0232] The tank device 206 has an approximately U-shaped configuration at the cutout 210, with the first web region 212 and the second web region 214 forming upstrokes of the U.

[0233] The cutout 210 is open to a front side 218 of the tank device 206.

[0234] A receiving space 220 (see Figure 9) lies between the battery device 192 and the support rod 180. When the tank device 206 is fixed to the support rod device 14, the third web region 216 lies in the receiving space 220.

[0235] The cutout 210 of the tank device 206 is located at a holding area 222 of the tank device 206. The tank device 206 can be plugged onto a housing part 200, in which the battery device 192 is located, via the holding area 222. This allows for a positive locking fixation, at least in transverse directions to the longitudinal axis 182 of the holding rod 180.

[0236] In one embodiment, a further connection such as a force-locking connection or locking connection with the holding rod 180 may be provided in order to achieve fixation in a direction parallel to the longitudinal axis 182.

[0237] The tank device 206 is formed by the holding area 222 and the sub-area 208. In particular, the holding area 222 is connected in one piece or in one part to the sub-area 208. This results in a large receiving space for cleaning fluid.

[0238] In one embodiment, a recessed grip 224 for grasping the tank device 206 as a unit is arranged on the partial area 208. The floor cleaning machine 10 comprises a supply device 226 for supplying cleaning fluid to the floor 18 to be cleaned. In particular, cleaning fluid is supplied from the tank device 206 to the cleaning tools 56, 58. The supply device 226 is connected to the tank device 206. A corresponding connection is provided on the holder 204, so that, particularly when the tank device 206 is correctly fixed to the holder 204, a fluid-effective connection (in particular with controllability of the cleaning fluid supply to the floor head 12) is automatically established.

[0239] In one embodiment, parts of the feed device 226, which are guided from the housing device 190 to the base head 12, are arranged within the joint device 16 (see Figure 1; the joint device 16 is not shown there).

[0240] A pump is provided to convey cleaning fluid from the tank device 206 via the supply device 226 to the base head 12, or the conveyance is gravity-driven, and a solenoid valve, for example, is provided for control. In particular, a delivery rate can be adjusted via the display / operating device 188.

[0241] The tank device 206 is adapted in its external shape to the housing part 200, so that in particular a flush continuation is achieved when the tank device 206 is fixed to the holding rod device 14.

[0242] The holding rod device 14 comprises an electronics box 228 in which a circuit device is arranged in a protected manner.

[0243] In one embodiment, (at least) one circuit board with corresponding electrical / electronic circuit components is arranged in the electronics box 228. In particular, the electronics box 228 is mounted on the support rod 180, facing away from the battery device 192 and the tank device 206.

[0244] In one embodiment, rollers 230 are arranged on the floor head 12 in the area of ​​the rear end 34. These serve to transport the floor cleaning machine 10 outside of a cleaning operation. The support wheels 30 are located between the rollers 230. The rollers 230 are spaced from the installation plane 28.

[0245] In a first embodiment (Figure 16(a), (b)), the first cleaning tool 56 and the second cleaning tool 58 comprise a circular disk 302 with an upper side 304. When the cleaning tool 56 or 58 is fixed to the base head 18, the upper side 304 faces away from the installation plane 28.

[0246] On a bottom side 306, which faces away from the top side 304, there are bristle bundles 308. These are arranged at least on an outer side of the cleaning tool 56, 58, directed obliquely outwards, i.e., they are at an acute angle to the bottom side 306.

[0247] The circular disc 302 comprises a central opening 310. The cleaning tool 56, 58 can be connected to the associated disc holder 48, 50 via the central opening 310, in particular via a bayonet connection.

[0248] The bayonet connection comprises, for example, three bayonet pins, which ensure centering with radial play when fixing the circular disc 302 to the associated disc holder 48, 50.

[0249] In the embodiment shown in Figure 16(a), the circular disk 302 is flat on the upper side 304.

[0250] In a second embodiment (Figure 17(a), (b)), the cleaning tool 56, 58 is basically of the same design, with a circular disk 312 being provided, which has a first annular region 314 around the central opening 310 and a second annular region 316 around the first annular region 314. A shoulder 318 is located between the first annular region 314 and the second annular region 316. An outer edge of the circular disk 312 is formed between the second annular region 316. The central opening 310 is located at the first annular region 314.

[0251] Otherwise, the design is the same as described for the cleaning tool 56, 58 according to Figure 16 (a), (b).

[0252] The cleaning tool 56, 58 is mounted on the associated disc holder 48 or 50 (see Figures 18, 19). A rotationally fixed connection is established, for example, via a bayonet connection through the central opening 310.

[0253] A corresponding mounting of the first cleaning tool 56 on the first disk holder 48 and of the second cleaning tool 58 on the second disk holder 50 is provided with axial play in addition to the radial play. This play is indicated in Figure 18 by reference numeral 320.

[0254] If the base head 12 is lifted from the installation plane 28 and a pressure element described in more detail below is not effective, then the corresponding cleaning tool 56, 58 can be displaced perpendicular to the installation plane 28 with respect to the base head body 22 due to the axial play.

[0255] A typical dimension for the axial play 320 perpendicular to the installation plane 28 is in the range between 1 mm and 5 mm and in particular 3 mm.

[0256] (During operation of the floor cleaning machine 10, the axial play 320 is not relevant, since the weight of the floor cleaning machine 10 presses the corresponding cleaning tool 56 or 58, even if no pressure element acts as described below.) A fixing device 322 (Figures 15, 11) is located on the floor head body 22. The fixing device 322 can be used to set a respective angle of inclination of the first cleaning tool 56 and the second cleaning tool 58 to the installation plane 28. Such an angle of inclination leads to propulsion of the floor head 12 and thus of the floor cleaning machine 10 along a floor 18 to be cleaned. In particular, the fixing device 322 allows the corresponding angle of inclination to be variably adjusted, and thus also the propulsion.

[0257] In one embodiment, the fixing device 322 comprises a fork element 324 with a first fork web 326 and a second fork web 328.

[0258] At a front end 330 of the fork element 324, which is a front end 330 of the fixing device 322, the fork webs 326 and 328 are spaced apart from each other.

[0259] In one embodiment, a shaft 332 is located in the area of ​​the front end 330 on the fork element 324 to form a pivot bearing 334.

[0260] The fork webs 326, 328 are joined together away from the front end 330. The securing device 322 comprises a first web 336, which is connected to the fork element 324 at this joining area.

[0261] In one embodiment, a first pressure element 338 is located on one side of the first web 336, and a second pressure element 340 is located on an opposite side. The first pressure element 338 is associated with the first cleaning tool 56, and the second pressure element 340 is associated with the second cleaning tool 58. In one embodiment, the first pressure element 338 and the second pressure element 340 are each formed by rollers 342 with a rotation axis 344.

[0262] For example, the rollers 342 on the fixing device 322 (on the first web 336) are ball-bearing mounted.

[0263] In principle, the first pressure element 338 and / or the second pressure element 340 can also be designed as a sliding element.

[0264] As explained in more detail below, the first pressure element 338 acts on the first cleaning tool 56 via mechanical contact, and the second pressure element 340 acts on the second cleaning tool 58 via mechanical contact. The first cleaning tool 56 rotates relative to the first pressure element 338 under mechanical contact, and the second cleaning tool 58 rotates relative to the second pressure element 340 with mechanical contact. The corresponding contact surface with the cleaning tool 56, 58 lies on the circular disk 302 facing an edge of the circular disk 302.

[0265] In the embodiment according to Figure 17 (a), (b), the corresponding contact area is the second ring area 316.

[0266] By designing the roller 342 with rotation about the roller axis 344, the friction between the corresponding pressure element 338, 340 and the cleaning tool 56, 58 is reduced. The same effect is achieved by designing the roller as a sliding element.

[0267] Connected to the first web 336 is a second web 346, which has an angled configuration. It has a first region 348, which is directly connected to the first web 336 and, with respect to a plane of the fork element 324, is transverse to the first web 336. The second web 346 has a second region 350, which is connected to the first region 348. The second region 350 is angled to the first region 348 and, in one embodiment, is oriented at least approximately parallel to a plane of the fork element 324.

[0268] A fixing element 352 is arranged on the second web 346 and thereby on the second region 350, by means of which a defined pivoting position of the fixing device 322 (and thus of the pressure elements 338, 340) on the pivot bearing 334 relative to the base head body can be fixed and, in particular, can be adjusted.

[0269] The fastening device 322 has a rear end 354, which faces away from the front end 330. The fastening element 352 is arranged in the region of the rear end 354.

[0270] A recess 356 is arranged on the base head body 22 (Figure 11), in which a portion of the securing device 322 is positioned. In particular, the fork element 324, the first web 336, and the pressure elements 338 and 340 are positioned in the recess 356. The recess 356 is open to the underside 24 of the base head body 22, so that the pressure elements 338, 340 can act on the respective upper side 304 of the cleaning tool 56 and 58, respectively.

[0271] The fixing device 322 is pivotally held on the base head body 22 via the fork element 324 with the shaft 332 through the pivot bearing 334.

[0272] The pivot bearing 334 is located at the front end 32 of the base head body 22. It is located in particular centrally with respect to the lateral side ends 36 and 38.

[0273] A pivot axis 356 of the pivot bearing 334 is parallel to the transverse axis

[0274] 44. It is transverse and in particular perpendicular to the longitudinal axis 40. It is transverse and in particular perpendicular to the forward direction of travel 42. It is parallel to the first pivot axis 92 of the articulated device 16.

[0275] It is transverse and in particular perpendicular to the first axis of rotation 52 and the second axis of rotation 54.

[0276] It is parallel to the roller axis 344.

[0277] In one embodiment, the recess 356 is closed to the upper side 26 of the base head body 22 by a cover 360 (Figure 10).

[0278] The second web 346, with its second region 350, is arranged above the upper side 304 of the base head body 22 (see Figure 10). The second web 346, with its first region 348, provides a transition from the arrangement at the lower side 306 to the upper side 304.

[0279] In particular, the fixing device 322 is positioned on the underside 306 of the base head body 22 such that it is guided past the holder 88 of the joint device 16 and then guided through a corresponding recess in the base head body 22 to the upper side 304.

[0280] A column 360 is arranged on the upper side 304 of the base head body 22. The fastening element 352 is vertically displaceable relative to the column 360 in a direction parallel to the height axis 46. This is indicated in Figure 14 by the double arrow with the reference numeral 362. In one embodiment, the fastening element 352 is a screw that acts on the second region 350 of the second web 346. A height position of this screw on the column 360 determines a pivot position of the fastening device 322 on the pivot bearing 334.

[0281] In this case, spring support can be provided via a spring 364 on the base head body 22 of the fastening device 322 in the region of the fastening element 352. The fastening element 352 of the fastening device 322 is arranged between the joint device 16 (the holder 88 of the joint device 16) and the rear end 34 and, in particular, is aligned with the free space 86. This allows access to the fastening element 352 through the free space 86 in order to variably adjust a height position of the fastening device 322 (a pivot position on the pivot bearing 334). This allows a variably adjusted height position of the pressure elements 338, 340 relative to the installation plane 28. A set position is fixed.

[0282] The first pressure element 338 and the second pressure element 340 are connected to each other by the fixing device 322. A corresponding adjustment is thus carried out synchronously for the first cleaning tool 56 and the second cleaning tool 58.

[0283] The fixing device 322 with the pressure elements 338 and 340 is designed in particular such that a first angle of inclination 366 of the first cleaning tool 56 of the installation plane 28 and a second angle of inclination 368 of the second cleaning tool 58 of the second installation plane (Figure 19) are of equal magnitude.

[0284] For example, the fixing element 352 can be used to set the angles of inclination 366, 368 during the manufacture or assembly of the floor cleaning machine 10. Furthermore, adjustment is possible during maintenance by accessing the appropriate tool through the free space 86.

[0285] In principle, the setting can also be made by an operator.

[0286] In such an embodiment, the fixing element 352 is then provided, for example, with a lever that can be adjusted by an operator through the free space 86. In principle, it is also possible for the fixing element 352 to be associated with a motor drive.

[0287] The pressure elements 338 and 340 have a distance in the transverse axis 44 which is smaller than a corresponding distance to the nearest side end 36 or 38.

[0288] The first pressure element 338 is arranged to act on one side of the first cleaning tool 56 to cause an inclination. The second pressure element 340 is positioned correspondingly with respect to the second cleaning tool 58.

[0289] During operation of the floor cleaning machine 10, a height position of the first pressure element 338 and the second pressure element 340 relative to the installation plane 28 is fixed. This is determined by the position of the fixing element 352.

[0290] The specific height position of the first pressure element 338 and the second pressure element 340 relative to the installation plane 28 determines the inclination angles 366, 368.

[0291] The first cleaning tool 56 and the second cleaning tool 58 rotate relative to the floor head body 22. The first rotation axis 52 and the second rotation axis 54 are spatially fixed with respect to the floor head body 22 (with respect to the floor head 12).

[0292] The first pressure element 338 is arranged and configured such that it contacts the first cleaning tool 56 on the upper side 304 in a region 370 facing the second cleaning tool 58. Accordingly, the second pressure element 340 contacts the second cleaning tool 58 in a region 372 facing the first cleaning tool 56 (Figure 12). The pressure elements 338, 340, in conjunction with the axial and radial play 320, allow the angle of inclination 366 and 368 to be adjusted, and in particular, to be variably adjusted.

[0293] If the first pressure element 338 and the second pressure element 340 are located closer to the installation plane 28 (see Figure 19), then a larger first inclination angle 366 and second inclination angle 368 can be set (Figure 19).

[0294] Accordingly, if these are further away from the installation plane 28, then the inclination angles 366, 368 are smaller (Figure 18).

[0295] In principle, it is also possible for the pressure elements 338, 340 to be positioned such that they do not act on the associated cleaning tools 56, 58 or do not cause any inclination. In this case, the inclination angles 366, 368 are zero, and no significant propulsion is generated.

[0296] The pressure elements 338, 340 exert a type of tilting moment on the associated cleaning tool 56, 58, which causes the tilt. The axial and radial play 320 of the bearing of the respective cleaning tool 56, 58 on the associated disc holder 48, 50 allows this tilting due to the one-sided pressure from above by the pressure elements 338, 340.

[0297] The first cleaning tool 56 rotates about a first axis of rotation 374 (Figures 18 and 19). The second cleaning tool 58 rotates about a second axis of rotation 376. The first axis of rotation 374 and the second axis of rotation 376 are not spatially fixed. The first axis of rotation 374 revolves around an imaginary conical surface. A conical axis of this conical surface is coaxial with the first axis of rotation 52. A conical angle of this conical surface corresponds to the first angle of inclination 366. Accordingly, the second axis of rotation 376 revolves on a conical surface with a conical axis coaxial with the second axis of rotation 54 and a conical angle corresponding to the second angle of inclination 368.

[0298] The first cleaning tool 56 and the second cleaning tool 58 perform a kind of precession.

[0299] The first cleaning tool 56 and the second cleaning tool 58 rotate in opposite directions and through finite inclination angles 366, 368 (which differ from 0°) a propulsion results which acts in the forward direction 42 with a corresponding direction of rotation of the cleaning tools 56, 58.

[0300] Fundamentally, the propulsion is quantitatively determined, among other things, by the size of the inclination angles 366, 368 (the magnitude). This can be adjusted by the pivot position of the fixing device 322 (and thus the height position of the pressure elements 338, 340 relative to the installation plane 28) and fixed relative to the ground head 12 via the fixing element 352.

[0301] The floor cleaning machine 10 according to the invention functions as follows:

[0302] During a cleaning operation, the tank device 206 is located on the support rod device 14 and the dirty fluid tank device 104 is located on the floor head 12.

[0303] An operator operates the floor cleaning machine 10 via the holding rod device 14 with the handlebar 184 and stands behind the floor cleaning machine 10 on the operator side 20.

[0304] The cleaning tools 56, 58 are driven in their counter-rotation by the drive motor 66. Due to their inclination relative to the support plane 28, they exert propulsion. An operator can adjust the pivot angles at the first joint 90 and the second joint 96 and adapt them to the machining process, and in particular, also perform steering.

[0305] The cleaning tools 56, 58 rotate and act on the floor 18 to be cleaned.

[0306] Via the supply device 226, cleaning fluid is applied from the tank device 206 to the floor 18 to be cleaned and, in particular, initially to the cleaning tools 56, 58.

[0307] A dirty water on the floor 18 is removed via the suction bar 102.

[0308] The corresponding suction flow is generated by the blower device 100. Dirty fluid is coupled into the dirty fluid tank device 104 at the floor head 12.

[0309] The necessary electrical energy, in particular for the drive motor 66 and the blower device 100, is provided by the battery device 192.

[0310] After completion of a cleaning process, an operator can remove the dirty fluid tank device 104 in the direction 154 via the handle 140.

[0311] In the solution according to the invention, both the blower device 100 and the dirty fluid tank device 104 are arranged on the base head 12. This results in short fluid paths for the dirty fluid. Furthermore, it results in a low center of gravity.

[0312] The dirty fluid tank device 104 is provided with the cutout 156.

[0313] This allows, on the one hand, the dirty fluid tank device 104 to be provided with a large storage volume and, on the other hand, an optimized positioning on the floor head 12 results without hindering the mobility of the holding rod device 14 on the joint device 16.

[0314] The blower device 100 and the drive motor 66 are positioned at the edge of the floor head 12 by the arrangement at the corner regions 64 and 62, respectively, such that they do not provide any significant limitations for the receiving volume of the dirty fluid tank device 104.

[0315] Through the corresponding column devices 108, 112 with the corresponding column housings 110, 114, they also provide contact areas / holding areas for fixing the dirty fluid tank device 1041 to the base head 12.

[0316] The result is a compact and space-saving design.

[0317] The arrangement of the battery device 192 on the support rod device 14 and the arrangement of the tank device 206 on the support rod device 14 result in an optimized center of gravity. In particular, the tank device 206 is arranged on the same side as the battery device 192 on the support rod device 14, above the latter. They can be pivoted together with the support rod device 14 when pivoting the latter on the joint device 16.

[0318] This results in a large range of motion for the pivoting of the support rod device 14 (with battery device 192 and tank device 206) to the floor head 12. This, in turn, results in high maneuverability of the floor cleaning machine 10 and good adaptability to the special cleaning requirements with "obstacles" on a floor 18 to be cleaned.

[0319] In the floor cleaning machine 10, in particular, a propulsion in the

[0320] Forward travel direction 42 is provided. This facilitates operability and maneuverability during a cleaning operation. This propulsion is achieved by finite inclination angles 366, 368 of the effective range of the respective cleaning tool 56, 58 relative to the installation plane 28. In one embodiment, the corresponding inclination angle 366, 368 is fixed.

[0321] In principle, it is also possible to variably set the inclination angles 366, 368 by accessing the setting element 352. (These are fixed during operation of the floor cleaning machine 10.)

[0322] The adjustment is carried out by adjusting a height position of the pressure elements 338, 340 relative to the installation plane 28. Due to the mounting of the cleaning tools 56, 58 on the respective disc holders 48, 50 with axial play 320, a respective inclination of the first cleaning tool 56 to the installation plane 28 and of the second cleaning tool 58 to the installation plane 28 can be adjusted and fixed due to the play 320 by exerting pressure from above (via the first pressure element 338 or the second pressure element 340).

[0323] During operation of the floor cleaning machine 10, the pressure elements 338, 340 are spatially fixed and the respective cleaning tool 56 or 58 rolls or slides on its upper side 304 on the associated pressure element 338 or 340.

[0324] Due to the one-sided eccentric effect of the respective pressure element 338, 340, the corresponding cleaning tool 56, 58 is forced to tilt at the angle of inclination 366, 368. This creates and adjusts the corresponding propulsion. It can be adapted to the existing cleaning conditions if necessary. This allows, for example, the "smoothness" of a floor 18 to be cleaned to be taken into account, or, for example, if a floor 18 to be cleaned has an incline. In the solution according to the invention, the first axis of rotation 52 and the second axis of rotation 54 are spatially fixed relative to the floor head 12. This allows for the torque coupling via a corresponding torque transmission device 70 to be designed in a structurally advantageous manner.In particular, it can be achieved in a simple manner that both the first disc holder 48 and the second disc holder 50 are driven by a single drive motor 66.

[0325] The corresponding torque transmission device 70 (the corresponding gear) can also be designed in a space-saving manner and in particular in a planar arrangement.

[0326] Due to the inclination of the inclination angles 366, 368 with a spatially fixed rotation axis 52 or 54, the cleaning tools 56, 58 perform a type of precessional movement with a first rotation axis 374 or second rotation axis 376 orbiting around a conical surface.

[0327] This results in advantageous operability and, in particular, effortless operation with high maneuverability for an operator. The floor cleaning machine 10, and in particular the floor head 12, can be designed in a space-efficient manner. For example, a dirt fluid tank device 104 with a large storage volume can be positioned on the floor head 12, and a blower device 100 can also be positioned on the floor head 12.

[0328] List of reference symbols

[0329] 10 floor cleaning machine

[0330] 12 bottom head

[0331] 14 Holding rod device

[0332] 16 Joint device

[0333] 18 Floor

[0334] 20 Operator side

[0335] 22 floor heads bodies

[0336] 24 subpage

[0337] 26 Top

[0338] 28 Installation level

[0339] 30 support wheel

[0340] 32 front end

[0341] 34 Rear end

[0342] 36 first page end

[0343] 38 second page end

[0344] 40 Longitudinal axis

[0345] 42 Forward direction

[0346] 44 Transverse axis

[0347] 46 Height axis

[0348] 48 first disc holder

[0349] 50 second disc holder

[0350] 52 first axis of rotation

[0351] 54 second axis of rotation

[0352] 56 first cleaning tool

[0353] 58 second cleaning tool

[0354] 60 effective range

[0355] 62 first corner area

[0356] 64 second corner area

[0357] 66 drive motor

[0358] 68 Motor axle Torque transmission device First gear First belt drive Second gear Second belt drive

[0359] Gearbox housing first branch second branch

[0360] Free space

[0361] Bar first holder first joint first pivot axis second holder second joint second pivot axis

[0362] Blower device

[0363] Suction bar

[0364] Dirty fluid tank system

[0365] Free space first column device first column housing second column device second column housing third column device

[0366] triangle

[0367] base

[0368] container

[0369] Lid

[0370] Snap connection

[0371] bottom

[0372] Top

[0373] Front Back First lateral side Second lateral side Area

[0374] Handlebar

[0375] Swivel axis

[0376] Pivot bearing a, 146b web

[0377] connecting bridge

[0378] recessed grip

[0379] Nut

[0380] Direction

[0381] Section first web area second web area third web area connection

[0382] Counter connection

[0383] inclined surface

[0384] inclined surface

[0385] Coverage area

[0386] transition

[0387] Coverage area

[0388] Direction

[0389] Holding rod

[0390] Longitudinal axis of handlebar a, 186b arm

[0391] Display / operating device Housing device Battery device

[0392] holder

[0393] Page Page

[0394] Housing part

[0395] bottom

[0396] holder

[0397] Tank facility for cleaning fluid

[0398] Sub-area

[0399] Section first bridge area second bridge area third bridge area

[0400] front

[0401] recording room

[0402] Holding area

[0403] recessed grip

[0404] Feeding device

[0405] Electronics box

[0406] role

[0407] circular disc

[0408] Top

[0409] bottom

[0410] Bristle bundle central opening

[0411] circular disc first ring area second ring area

[0412] Paragraph

[0413] Game

[0414] Determination device

[0415] Fork element first fork leg second fork leg front end shaft

[0416] Pivot bearing first web first pressure element second pressure element roller

[0417] Roller axis second web first area second area fixing element rear end recess pivot axis column double arrow spring first inclination angle second inclination angle area area first rotation axis second rotation axis

Claims

Patent claims 1. A floor cleaning machine comprising a floor head (12) which is assigned a support plane (28) for a floor (18) to be cleaned, a first disc holder (48) and a first cleaning tool (56), wherein the first disc holder (48) is arranged on the floor head (12) and holds the first cleaning tool (56) and is driven to rotate about a first axis of rotation (52) during operation of the floor cleaning machine, a second disc holder (50) and a second cleaning tool (58), wherein the second disc holder (50) is arranged on the floor head (12) and holds the second cleaning tool (58) and is driven to rotate about a second axis of rotation (54) during operation of the floor cleaning machine,wherein the first axis of rotation (52) of the first disc holder (48) and the second axis of rotation (54) of the second disc holder (50) are each oriented transversely to the installation plane (28), and a first direction of rotation about the first axis of rotation (52) and a second direction of rotation about the second axis of rotation (54) are opposite, and a holding rod device (14) which is movably hinged to the base head (12) by a joint device (16), characterized in that the first cleaning tool (56) is mounted on the first disc holder (48) with axial and / or radial play (320), that a first pressure element (338) is arranged on the base head (12), which is assigned to the first cleaning tool (56), which can be placed against the first cleaning tool (56), and via which a first angle of inclination (366) of the first cleaning tool (56) to the installation plane (28) is determined,that the second cleaning tool (58) is mounted on the second disc holder (50) with axial and / or radial play (320), and that a second pressure element (340) is arranged on the base head (12), which is associated with the second cleaning tool (58), which is connected to the, second cleaning tool (58) can be applied and via which a second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28) is determined.

2. Floor cleaning machine according to claim 1, characterized by at least one of the following: the first pressure element (338) acts continuously on the first cleaning tool (56) and in particular forms a positive guide for the first cleaning tool (56); the second pressure element (340) acts continuously on the second cleaning tool (58) and in particular forms a positive guide for the second cleaning tool (58); the first pressure element (338) comprises a roller (342) and / or a sliding element for a contact area with the first cleaning tool (56); the second pressure element (340) comprises a roller (342) and / or a sliding element for contact with the second cleaning tool (58).

3. Floor cleaning machine according to claim 1 or 2, characterized in that the first pressure element (338) acts on the first cleaning tool (56) in such a way that a first axis of rotation (374) of rotation of the first cleaning tool (56) revolves on a conical surface.

4. Floor cleaning machine according to claim 3, characterized by at least one of the following: a conical axis of the conical shell is coaxial with the first axis of rotation (52); a conical angle of the conical shell corresponds to the first angle of inclination (366) of the first cleaning tool (56) to the installation plane (28); the first axis of rotation (52) is spatially fixed.

5. Floor cleaning machine according to one of the preceding claims, characterized in that the second pressure element (340) acts on the second cleaning tool (58) in such a way that a second axis of rotation (376) of rotation of the second cleaning tool (58) revolves on a conical surface.

6. Floor cleaning machine according to claim 5, characterized by at least one of the following: a conical axis of the conical shell is coaxial with the second axis of rotation (54); a conical angle of the conical shell corresponds to the second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28); the second axis of rotation (54) is spatially fixed.

7. Floor cleaning machine according to one of the preceding claims, characterized in that the first pressure element (338) acts on an upper side (304) of the first cleaning tool (56) which faces away from the installation plane (28), and / or that the second pressure element (340) acts on an upper side (304) of the second cleaning tool (58) which faces away from the installation plane (28).

8. Floor cleaning machine according to one of the preceding claims, characterized by at least one of the following: by adjustable positioning of the first pressure element (338) on the floor head (12), the first angle of inclination (366) of the first cleaning tool (56) to the installation plane (28) can be set; by adjustable positioning of the second pressure element (340) on the floor head (12), the second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28) can be set.

9. Floor cleaning machine according to one of the preceding claims, characterized in that a distance between the first pressure element (338) and the second pressure element (340) in a transverse axis (344) perpendicular to a forward travel direction (42) of the floor head (12) is smaller than a distance of the first pressure element (338) to a first lateral side end (36) of the floor head (12) and / or a distance of the second pressure element (340) to a second lateral side end (38) of the floor head (12), wherein the first lateral side end (36) in the transverse axis (344) is closer to the first pressure element (338) than the second lateral side end (38) of the floor head (12).

10. Floor cleaning machine according to one of the preceding claims, characterized in that the first pressure element (338) and the second pressure element (340) are located between a first belt drive (74) and a second belt drive (78) of a torque transmission device (70) with respect to a transverse axis (344) of the floor head (12), which is perpendicular to a forward travel direction (42) of the floor head (12).

11. Floor cleaning machine according to one of the preceding claims, characterized in that the first pressure element (338) and the second pressure element (340) are connected to one another.

12. Floor cleaning machine according to claim 11, characterized by at least one of the following: the first pressure element (338) and the second pressure element (340) act synchronously on the respectively assigned cleaning tool (56; 58); the first pressure element (338) and the second pressure element (340) effect an equal inclination to the installation plane (28) on the respectively assigned cleaning tool (56; 58); the first angle of inclination (366) of the first cleaning tool (56) to the installation plane (28) and the second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28) have opposite orientations and are in particular equal in magnitude; the first cleaning tool (56) and the second cleaning tool (58) are arranged relative to one another such that, starting from the installation plane (28) in a height axis (46) perpendicular to the installation plane (28) a distance between the first cleaning tool (56) and the second cleaning tool (58) decreases, in particular towards a floor head body (22) of the floor head (12).

13. Floor cleaning machine according to claim 11 or 12, characterized in that on the floor head (12) a fixing device (322) is pivotally mounted on a pivot bearing (334), on which the first pressure element (338) and the second pressure element (340) are seated, and in that a specific pivot position of the fixing device (322) on the pivot bearing (334) specifies the first angle of inclination (366) of the first cleaning tool (56) and the second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28).

14. Floor cleaning machine according to claim 13, characterized by at least one of the following: the pivot bearing (334) is arranged in the region of a front end (32) of the floor head (12) relative to a forward direction of travel (42) of the floor head (12); relative to a transverse axis (44) of the floor head (12), which is oriented transversely to a forward direction of travel (42) of the floor head (12), the pivot bearing (334) lies between the first disc holder (48) and the second disc holder (50); the pivot bearing (334) is seated on a floor head body (22) of the floor head (12).

15. Floor cleaning machine according to claim 13 or 14, characterized by at least one of the following: a pivot axis (358) of the pivot bearing (334) is oriented parallel to the installation plane (28); a pivot axis (358) of the pivot bearing (334) is oriented transversely and in particular perpendicularly to a forward travel direction (42) of the floor head (12); a pivot axis (358) of the pivot bearing (334) is oriented parallel to a first pivot axis (92) of the articulation device (16); a pivot axis (358) of the pivot bearing (334) is oriented transversely and in particular perpendicularly to the first rotation axis (52) and / or the second rotation axis (54); a pivot axis (358) of the pivot bearing (334) is oriented parallel to a roller axis (344) of the first pressure element (338) and / or the second pressure element (340).

16. Floor cleaning machine according to one of claims 13 to 15, characterized in that a floor head body (22) of the floor head (12) has a recess (356) which is open towards the installation plane (28) at least in the region of the first pressure element (338) and the second pressure element (340), and that at least a partial region of the fixing device (322) is positioned in the recess (356).

17. Floor cleaning machine according to one of claims 13 to 16, characterized in that the fixing device (322) is connected to an upper side (26) of a floor head body (22) of the floor head (12), which is remote from the installation plane (28), and is connected in particular in the region of a rear end (34).

18. Floor cleaning machine according to one of claims 13 to 17, characterized in that the fixing device (322) comprises at least one of the following: a fork element (324), via which the fixing device (322) is pivotally mounted on the floor head (12) via the pivot bearing (334); a first web (336) which is connected to a fork element (324) and on which the first pressure element (338) and the second pressure element (340) are seated, wherein in particular the first pressure element (338) and the second pressure element (340) are seated on opposite sides of the first web (336); a second web (346) which is connected to a first web (336), on which the first pressure element (338) and the second pressure element (340) are seated, and on which a fixing element (352) for fixing a pivot position is arranged.

19. Floor cleaning machine according to claim 18, characterized in that the second web (346) is guided on or above an upper side (26) of a floor head body (22) of the floor head (12), wherein the upper side (26) faces away from the installation plane (28).

20. Floor cleaning machine according to one of the preceding claims, characterized in that the first pressure element (338) and the second pressure element (340) are assigned at least one fixing element (352), by means of which a position of the first pressure element (338) and / or the second pressure element (340) on the floor head (12) is fixed.

21. Floor cleaning machine according to claim 20, characterized by at least one of the following: the at least one fastening element (352) is arranged between the articulation device (16) and a rear end (34) of the floor head (12) with respect to a longitudinal axis (40) of the floor head (12); the at least one fastening element (352) is accessible from a rear end (34) of the floor head (12) via a free space (106) on the floor head (12), in particular for adjusting a pivot position of a fastening device (322) relative to the floor head (12); the at least one fastening element (352) is located between a first belt drive (74) and a second belt drive (78) with respect to a transverse axis (44) of the floor head (12), which is oriented perpendicular to a forward travel direction (42) of the floor head (12); the at least one fixing element (352) is seated on a pivotable fixing device (322).

22. Floor cleaning machine according to one of the preceding claims, characterized by at least one of the following: the holding rod device (14) is gimbal-mounted to the floor head (12) by the joint device (16); the joint device (16) comprises a first joint (90) with a first pivot axis (92) and a second joint (96) with a second pivot axis (98), wherein the first pivot axis (92) and the second pivot axis (98) are oriented transversely and in particular perpendicular to one another and the first pivot axis (92) is oriented parallel to the installation plane (28); a first pivot axis (92) of the joint device (16) is oriented transversely and in particular perpendicular to a forward travel direction (42) of the floor head (12).

23. Floor cleaning machine according to one of the preceding claims, characterized in that a dirty fluid tank device (104) for receiving dirty fluid and a blower device (100) are arranged on the floor head (12).

24. Floor cleaning machine according to claim 23, characterized in that the dirty fluid tank device (104) has a cutout (156), wherein when the dirty fluid tank device (104) is positioned on the floor head (12), the joint device (16) lies at least partially in the cutout (156).

25. Floor cleaning machine according to one of the preceding claims, characterized in that a free space (106) is arranged or formed on the floor head (12) as a movement space for pivoting the holding rod device (14) relative to the floor head (12) about a first pivot axis (92), wherein the first pivot axis (92) is perpendicular to a forward travel direction (42) of the floor head (12).

26. Floor cleaning machine according to claim 25, characterized in that the free space (106) is a continuation of a cutout (156) of a dirty fluid tank device (104) when the dirty fluid tank device (104) is fixed to the floor head (12), wherein a continuation line is perpendicular to a first pivot axis (92).

27. Floor cleaning machine according to one of the preceding claims, characterized in that a tank device (206) for cleaning liquid is removably seated on the holding rod device (14).

28. Floor cleaning machine according to one of the preceding claims, characterized in that a battery device (192) is located on the holding rod device (14).

29. Floor cleaning machine according to claim 28, characterized in that the battery device (192) and a tank device (206) for cleaning liquid are positioned on a same side of the holding rod device (14).

30. Floor cleaning machine according to one of the preceding claims, characterized by a supply device (226) for supplying cleaning liquid from a tank device (206) for cleaning liquid to a floor (18) to be cleaned and / or to the first cleaning tool (56) and / or to the second cleaning tool (58).

31. Floor cleaning machine according to one of the preceding claims, characterized in that the holding rod device (14) comprises a handlebar (184).

32. Floor cleaning machine according to one of the preceding claims, characterized in that at least one suction bar (206) is arranged on the floor head (12), which is fluidly connected to the blower device (100).

33. Floor cleaning machine according to one of the preceding claims, comprising a drive motor (66) for the first disc holder (48) and the second disc holder (50), which is seated on the floor head (12), and a torque transmission device (70) which is torque-effectively coupled to the drive motor (66) and ensures torque transmission to the first disc holder (48) and the second disc holder (50), wherein the torque transmission device (70) has a first gear (72) which is torque-effectively coupled to the first disc holder (48) via a first toothed belt, and a second gear (76) which is torque-effectively coupled to the second disc holder (50) via a second toothed belt.

34. Floor cleaning machine according to claim 33, characterized in that the drive motor (66) is coupled to the first gear (72) and drives the first gear (72) to rotate about a first axis of rotation, and in that the first gear (72) is coupled to the second gear (76), wherein the second gear (76) is driven to rotate about a second axis of rotation of the second gear (76) by means of the first gear (72), and wherein directions of rotation of the rotation about the first axis of rotation and the second axis of rotation are opposite.

35. Floor cleaning machine according to claim 33 or 34, characterized in that the first gear (72) and the second gear (76) lie in a common plane with respect to a respective underside and / or a respective upper side, which plane is in particular parallel to the installation plane (28).

36. Floor cleaning machine according to one of claims 33 to 35, characterized in that the drive motor (66) has a drive axis (68) with at least one of the following: the drive axis (68) is oriented transversely and in particular perpendicularly to the installation plane (28); the drive axis (68) is oriented parallel to a first axis of rotation of the first gear (72); the drive axis (68) is oriented parallel to a second axis of rotation of the second gear (76); the drive axis (68) is spaced apart and in particular parallel to a first axis of rotation of the first gear (72) and a second axis of rotation of the second gear (76).

37. Floor cleaning machine according to one of claims 33 to 36, characterized in that a cover of the torque transmission device (70) has a flat upper side which is in particular parallel to the installation plane (28).

38. Floor cleaning machine according to claim 37, characterized by at least one of the following: a tank device (104), in particular removably, is positioned above a cover of the torque transmission device (70) relative to a vertical axis (46) of the floor head (12); the cover forms a support surface for a tank device (104).

39. Floor cleaning machine according to one of claims 33 to 38, characterized in that the first toothed belt and the second toothed belt are guided in a same plane with respect to a respective underside and / or a respective upper side, which is in particular parallel to the installation plane (28).

40. Floor cleaning machine according to one of claims 33 to 39, characterized in that the torque transmission device (70) is flat with a first envelope plane on an underside of the torque transmission device (70) and a second envelope plane on an upper side of the torque transmission device (70), wherein the underside faces the installation plane (28), and wherein the first envelope plane and the second envelope plane are parallel to one another and in particular parallel to the installation plane (28).

41. Floor cleaning machine according to one of claims 33 to 40, characterized in that the floor head (12) has a first region on which the torque transmission device (70) is seated, and a second region on which the drive motor (66) is seated, wherein the second region is positioned in a region of a rear end (34) of the floor head (12) and is oriented transversely to the first region, and that a free space is formed between the first region and the second region for receiving a tank device (104).

42. Floor cleaning machine according to claim 41, characterized in that a holder (88) for articulating the holding rod device (14) is seated on the first region, wherein the first gear (72) and the second gear (76) are positioned in a region between the holder (88) and a rear end (34) of the floor head (12).

43. Floor cleaning machine according to claim 42, characterized in that a cover of the torque transmission device (70) has, in a plan view, a V-shaped configuration with a first arm and a second arm which are oriented at an acute angle to each other, wherein the holder (88) is positioned between the first arm and the second arm.

44. A method for operating a floor cleaning machine (10), the floor cleaning machine (10) comprising: a floor head (12) having an associated support plane (28) for a floor (18) to be cleaned; a first disc holder (48) and a first cleaning tool (56), the first disc holder (48) being arranged on the floor head (12) and holding the first cleaning tool (56) and being driven to rotate about a first axis of rotation (52) during operation of the floor cleaning machine; a second disc holder (50) and a second cleaning tool (58), wherein the second disc holder (50) is arranged on the floor head (12) and holds the second cleaning tool (58) and is driven to rotate about a second axis of rotation (54) during operation of the floor cleaning machine, wherein the first axis of rotation (52) of the first disc holder (48) and the second axis of rotation (54) of the second disc holder (50) are each oriented transversely to the installation plane (28) and a first direction of rotation about the first axis of rotation (52) and a second direction of rotation about the second axis of rotation (54) are opposite;and a holding rod device (14) which is movably linked to the base head (12) by a joint device (16), in which the first cleaning tool (56) is mounted on the first disc holder (48) with play (320), the second cleaning tool (58) is mounted on the second disc holder (50) with play (320), and in which the first cleaning tool (56) and the second cleaning tool (58) are each forced to rotate such that a first axis of rotation (374) for the rotation of the first cleaning tool (56) revolves around a conical surface and a second axis of rotation (376) for the rotation of the second cleaning tool (58) revolves around a conical surface.; 45. Method according to claim 44, characterized in that the holding rod device (14) is articulated to the base head (12) by means of the joint device (16).

46. ​​Method according to claim 44 or 45, characterized in that the positive guidance for the first cleaning tool (56) is such that it is inclined towards the installation plane (28) and that the positive guidance for the second cleaning tool (58) is such that it is inclined relative to the installation plane (28).

47. Method according to one of claims 44 to 46, characterized in that a first angle of inclination (366) of the first cleaning tool (56) to the installation plane (28) and / or a second angle of inclination (368) of the second cleaning tool (58) to the installation plane (28) can be set in a variably adjustable manner. ***

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