Floor cleaning machine with first cleaning tool, second cleaning tool, and torque transmission device

Abstract

The invention relates to a floor cleaning machine comprising a floor head (12), which is associated with a contact plane (26) for a floor (18) to be cleaned; a first disc holder (52) and a first cleaning tool (44), said first disc holder (52) being provided on the floor head (12), holding the first cleaning tool (44), and being rotated about a first rotational axis (50) during the operation of the floor cleaning machine; a second disc holder (56) and a second cleaning tool (46), said second disc holder (56) being provided on the floor head (12), holding the second cleaning tool (46), and being rotated about a second rotational axis (58) during the operation of the floor cleaning machine, said first rotational axis (50) of the first disc holder (52) and said second rotational axis (58) of the second disc holder (56) each being oriented transversely to the contact plane (26); a drive motor (89) for the first disc holder (52) and the second disc holder (56), said drive motor being seated on the floor head (12); a torque transmission device (88), which is coupled to the drive motor (89) so as to transmit a torque and ensures a transmission of torque to the first disc holder (52) and the second disc holder (56); and a holding rod device (14), which is movably hinged to the floor head (12). The torque transmission device (88) has a first gear wheel (68), which is coupled to the first disc holder (52) via a first toothed belt (76) so as to transmit a torque, and a second gear wheel (78), which is coupled to the second disc holder (56) via a second toothed belt (86) so as to transmit a torque.

Description

[0001] Floor cleaning machine with first cleaning tool and second cleaning tool and torque transmission device

[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, a drive motor for the first disc holder and the second disc holder, which is mounted on the floor head, a torque transmission device,which is torque-effectively coupled to the drive motor and ensures torque transmission to the first disc holder and the second disc holder, and a holding rod device which is movably hinged to the floor head.

[0003] DE 10 2021 114 569 A1 discloses a surface cleaning machine in which a cleaning head is arranged on a device body in a pivotable manner about a pivot axis.

[0004] DE 1 428 383 discloses a floor care and cleaning device with a frame in which an electric motor is arranged.

[0005] CN 208598301 U also discloses a floor cleaning device. EP 0 242 348 discloses a device for reducing noise in gear drives with alternating directions of the transmittable torque.

[0006] DE 10 2022 101 563 A1 discloses a soil tillage device in which at least one spring element for generating a spring force between a soil unit and a guide part is assigned to a joint arrangement.

[0007] 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 a rotational axis 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 rotational axes 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 above with optimized space utilization at the floor head. This object is achieved according to the invention in the floor cleaning machine mentioned above in that the torque transmission device comprises a first gearwheel, which is torque-effectively coupled to the first disc holder via a first toothed belt, and a second gearwheel, which is torque-effectively coupled to the second disc holder via a second toothed belt.

[0010] In the solution according to the invention, 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 small height dimensions and, in particular, with a high level of flatness. This results in optimized space utilization.

[0011] 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.

[0012] 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.

[0013] 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 torque 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 from the drive motor and used, for example, to position a tank device.

[0014] 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 perpendicularly 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.

[0015] The parallel alignment of the first rotational axis of the first gear and the second rotational axis of the second gear results in a structurally advantageous 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 installation 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 arranged at an acute angle to the installation plane. In a structurally advantageous embodiment, they are oriented perpendicular to the installation plane.

[0016] In one embodiment, a first axis of rotation of the first cleaning tool and / or a second axis of rotation of the second cleaning tool are inclined to the installation plane. This allows propulsion to be achieved during operation of the floor cleaning machine. In one embodiment, the first axis of rotation of the first gear is parallel to the first axis of rotation of the first cleaning tool. In this case, the first axis of rotation is inclined to the installation plane. In an alternative embodiment, the first axis of rotation lies at an acute angle to the first axis of rotation. In this embodiment, the first axis of rotation can then be oriented perpendicular to the installation plane. The same applies to the relative orientation of the second axis of rotation of the second gear to the second axis of rotation of the second cleaning tool.

[0017] 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 pulley holder via the first pulley.

[0018] In the same way, the second gear wheel and the second pulley wheel form a belt drive for the second disc holder.

[0019] 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 is then formed on the first active gear, to which the torque of the drive motor is applied.

[0020] 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.

[0021] In particular, during operation of the floor cleaning machine, the first cleaning tool rotates about a first axis of rotation and the second cleaning tool rotates about a second axis of rotation with at least one of the following: the first axis of rotation and the second axis of rotation are at an acute angle to the installation plane; the first axis of rotation is at an acute angle to the first axis of rotation of the first disc holder; the second axis of rotation is at an acute angle to the second axis of rotation of the second disc holder.

[0022] If the first rotation axis and the second rotation axis (with opposite rotation directions) are at an acute angle to the installation plane, propulsion is achieved and the floor cleaning machine is easier to maneuver over the floor to be cleaned. In one embodiment, the first rotation axis and the second rotation axis are each at an acute angle to the rotation axis of the associated disc holder.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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 demonstrates 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] A simpler construction is achieved if, for example, the cover can also be used as a support surface for the tank equipment.

[0033] From a manufacturing point of view, it is advantageous if the first timing belt and the second timing belt are designed identically.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] This results in optimized use of space at the base head.

[0038] 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.

[0039] 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."

[0040] 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.

[0041] It is provided that at least one suction bar (suction beam) is arranged on the floor head, which is fluidly coupled to a blower device. The corresponding floor cleaning machine is then designed in particular for cleaning hard floors. Dirty fluid, including excess liquid, can be sucked off the floor to be cleaned via the at least one suction bar.

[0042] In one embodiment, a removably mounted tank device for dirt fluid is arranged on the base head. The space-saving design of the torque transmission device makes it possible to removably position a tank device on the base head, which has a relatively large storage volume.

[0043] In particular, it is provided that wet cleaning of a floor to be cleaned can be carried out via the floor cleaning machine. For this purpose, at least part of a supply device for cleaning fluid to a floor to be cleaned and / or to the first cleaning tool and / or to the second cleaning tool is provided on the floor head. The supply device is supplied with cleaning fluid, in particular from a tank device on the floor cleaning machine. In one embodiment, this tank device is arranged on the holding rod device. It is advantageous if at least one of the following is arranged on the holding rod device: a tank device for cleaning fluid; a battery device.

[0044] This allows the soil head to be made correspondingly compact.

[0045] In a structurally advantageous embodiment, the support rod device has a handlebar. The handlebar, which in particular has a first arm and a second arm, provides the operator with high maneuverability of the floor cleaning machine.

[0046] It is particularly advantageous if the support rod device is gimbal-mounted to the floor head with a first pivot axis and a second pivot axis, wherein the second pivot axis is oriented transversely and in particular perpendicularly to the first pivot axis, and wherein, in particular, the first pivot axis is at least approximately parallel to the installation plane. This results in a high degree of maneuverability of the floor cleaning machine over a floor to be cleaned for an operator.

[0047] 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.

[0048] It is then further advantageous if a holder for linking the support rod device is located on 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 base head. This results in optimized space utilization. In a sense, the torque transmission device (the gear) is built around the holder on a base body of the base head.

[0049] 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.

[0050] The following description of preferred embodiments, taken in conjunction with the drawings, serves to further explain the invention. They show:

[0051] Figure 1 shows an embodiment of a floor cleaning machine according to the invention, wherein a tank device for a floor head is removed from the floor head;

[0052] Figure 2 is a partial perspective view of the floor head of the floor cleaning machine according to Figure 1 with the tank device removed and housing parts removed;

[0053] Figure 3 is the same view as Figure 2 without cleaning tools; Figure 4 is a plan view of the floor head of the floor cleaning machine according to Figure 1 with the tank device removed in the direction A according to Figure 1; and

[0054] Figure 5 is a sectional view taken along line 5-5 of Figure 4.

[0055] An embodiment of a floor cleaning machine according to the invention, which is shown in the figures and designated by 10, comprises a floor head 12 and a holding rod device 14. The holding rod device 14 is movably hinged to the floor head 12 via a hinge device 16.

[0056] The floor cleaning machine 10 is used to clean a floor 18 (Figure 5). Cleaning tools, which are described in more detail below, are arranged on the floor head 12 for this purpose. The support rod device 14 is used to guide the floor cleaning machine 10 across the floor 18 by a standing user who stands on the floor 18 and is positioned behind the floor cleaning machine 10.

[0057] The floor head 12 comprises a base body 20 (tool deck) with a bottom side 22 and a top side 24. A support plane 26 is assigned to the floor head 12. The support plane 26 is defined by a plurality of support wheels. During operation of the floor cleaning machine 10, the floor head 12, and thus the floor cleaning machine 10 as a whole, is supported on the floor 18 to be cleaned via the support wheels 28. If the floor 18 is level, then during cleaning operation of the floor cleaning machine 10, the support plane 26 coincides with the floor 18.

[0058] The underside 22 of the base body 20 faces the installation plane 26.

[0059] The ground head 12 has a front end 30, a rear end 32 facing away from the front end 30, a first side end 34, and an opposite second side end 36. The ground head has a longitudinal axis 38 extending from the front end 30 to the rear end 32 and a transverse axis 40 extending from the first side end 34 to the second side end 36 and oriented perpendicular to the longitudinal axis 38. The longitudinal axis 38 and the transverse axis 40 are parallel to the installation plane 26.

[0060] The base head 12 further has a height axis 42 which is oriented perpendicular to the installation plane 26 and perpendicular to the longitudinal axis 38 and perpendicular to the transverse axis 40.

[0061] During operation of the floor cleaning machine 10, the operator is positioned behind the rear end 32 of the floor head 12.

[0062] The floor head 12 comprises a first cleaning tool 40 and a second cleaning tool 46. Actuating elements 48 of the first cleaning tool 44 and the second cleaning tool 46 protrude from the base body 20 relative to the underside 22 so that they can act on a floor to be cleaned.

[0063] The first cleaning tool 44 and the second cleaning tool 46 are each designed as a disc tool and in particular as a grinding disc.

[0064] In one embodiment, the first cleaning tool 44 and the second cleaning tool 46 are each brush tools.

[0065] In principle, it is also possible for the first cleaning tool or the second cleaning tool to have textile active areas or for a cleaning tool 44, 46 to have both brush active areas and textile active areas.

[0066] A first disk holder 52 is mounted on a corresponding pivot bearing on the base head 12 and, in turn, on the base body 20, so that it can rotate about a first axis of rotation 50. In one embodiment, the first disk holder 52 is positioned above the upper side 24 of the base body 20. The first disk holder 52 is provided with a receptacle for the first cleaning tool 44, to which the first cleaning tool 44 can be fixed in a rotationally fixed manner.

[0067] The first cleaning tool 44 is rotatable about a first rotational axis 54 (see Figure 5) via the first disk holder 52. The first rotational axis 54 is perpendicular to the installation plane 26. In one embodiment, the first cleaning tool 54 performs a type of precessional movement, and the first rotational axis 54 is not fixed in space, but rather runs on an (imaginary) conical surface. This allows propulsion of the floor head 12 and, in turn, the floor cleaning machine 10 during floor cleaning.

[0068] A cone angle of the cone surface lies at a "small" acute angle relative to a normal to the mounting plane 26. This acute angle is in particular less than 10° and is, for example, in the range of 2° to 5°.

[0069] In principle, it is possible for the first rotation axis 54 and the first rotation axis 50 of the first disk holder 52 to be coaxial with each other. In the described embodiment, the first rotation axis 50 is spatially fixed, and the first rotation axis 54 runs on the conical surface. In particular, the first rotation axis 50 of the first disk holder 52 is oriented perpendicular to the mounting plane 26.

[0070] Furthermore, a second disc holder 56 is mounted on the floor head 12, which rotates about a second rotation axis 58 during operation of the floor cleaning machine 10. The second rotation axis 58 is oriented transversely to the installation plane 26.

[0071] The second disc holder 56 has a receptacle to which the second cleaning tool 46 can be fixed in a rotationally fixed manner or is fixed for the operation of the floor cleaning machine 10. The second cleaning tool 46 rotates about a second rotation axis 60. This second rotation axis 60 is (like the first rotation axis 54) transverse to the installation plane 26 and runs on a conical surface to generate propulsion as described.

[0072] The second axis of rotation 58 of the second disc holder 56 is in particular perpendicular to the installation plane 26.

[0073] In particular, it is provided that the first axis of rotation 50 of the first disc holder 52 and the second axis of rotation 58 of the second disc holder 56 are oriented parallel to each other.

[0074] The height axis 42 is parallel to these rotation axes 50, 58.

[0075] The second disc holder 56 sits at the same height as the first disc holder 52 with respect to the height axis 42. In particular, upper sides 62a, 62b of the first disc holder 52 and the second disc holder 56 lie in a plane which is in particular parallel to the installation plane 26.

[0076] The first disc holder 52 is located at a first corner region 64 of the base body 20 between the front end 30 and the first side end 34. The second disc holder 56 is located at a second corner region 66 of the base body 20 between the front end 30 and the second side end 36.

[0077] Typically, the corresponding cleaning tool 44 or 46 has a larger (maximum) diameter than the associated disk holder 52 or 56. In particular, the first disk holder 52 and the second disk holder 56 are arranged such that a cleaning tool 44 or 46 fixed thereto does not protrude, or only protrudes to a small extent, beyond the front end 30 or beyond the associated side end 34 or 36. Furthermore, a first gear 68 is rotatably mounted on the base body 20 and on its upper side 24 via a corresponding pivot bearing. The first gear 68 is rotatable about a first axis of rotation 70. The first axis of rotation 70 is oriented transversely and in particular perpendicularly to the installation plane 26.

[0078] In one embodiment, the first rotational axis 70 of the first gear 68 is parallel to the first rotational axis 50 of the first disk holder 52 or to the second rotational axis 58 of the second disk holder 56.

[0079] The first gear 68 comprises a first active wheel 72 with a toothing and a first pulley 74. Relative to the vertical axis 42, the first pulley 74 is positioned above the first active wheel 72. The first pulley 74 is at the same height as the first pulley holder 52.

[0080] The first active wheel 72 and the first pulley 74 are connected to each other in a rotationally fixed manner, with the first rotation axis 70 serving as a common rotation axis. The first pulley 74 has a smaller diameter than the first active wheel 72.

[0081] A first toothed belt 76 is guided between the first pulley 74 and the first disc holder 52. The first pulley 74 drives the first disc holder 52 and thus the first cleaning tool 44.

[0082] A second gear 78 is also arranged on the upper side 24 of the base body 20. The second gear 78 is located at the same height as the first gear 68 with respect to the vertical axis 42.

[0083] The second gear 78 is mounted via a pivot bearing for rotation about a second rotation axis 80. The second rotation axis 80 of the second gear 78 is transverse and, in particular, perpendicular to the mounting plane 26. It is parallel to the first rotation axis 70 of the first gear 68.

[0084] The second gear 78 comprises a second active wheel 82 and a second pulley 84. The second pulley 84 is positioned above the second active wheel 82 relative to the vertical axis 42. The second pulley 84 is rotationally fixedly connected to the second active wheel 82. They share the second rotation axis 80 as their common rotation axis.

[0085] A second toothed belt 86 is guided between the second pulley 84 and the second pulley holder 56. Via the second pulley 84, the second toothed belt 86 drives the rotation of the second pulley holder 56 about the second rotation axis 58. A corresponding belt drive is formed.

[0086] In one embodiment, the first toothed belt 76 and the second toothed belt 86 are of identical design.

[0087] The first toothed belt 76 and the second toothed belt 86 are located on the same plane with respect to a bottom side facing the top side 24 of the base body 20, or are located on the same plane with respect to their respective top sides.

[0088] The second active gear 82 is mechanically coupled to the active gear 72 by corresponding tooth engagement. The first gear 68 is directly driven and, via the coupling of the first active gear 72 to the second active gear 82, drives the rotation of the second gear 78 about the second rotation axis 80, which in turn then provides the belt drive for the second pulley holder 56.

[0089] In one embodiment, the first gear 68 and the second gear 78 have a different number of teeth relative to the active gears 72, with the difference being in particular one. It has been shown that this can reduce noise generation.

[0090] The first gear 68, the second gear 78, the first disc holder 52 and the second disc holder 56, in combination with the toothed belts 76 and 86, form a torque transmission device 88 (gearing device) by means of which a torque generated by a drive motor 89 can be transmitted to the cleaning tools 44, 46 in order to effect their rotational movement about the first rotational axis 54 and the second rotational axis 60.

[0091] The first toothed belt 76 and the second toothed belt 86 are each guided geometrically torsion-free (twisting-free).

[0092] In the illustrated embodiment, all rotational axes 50, 58, 70, 80 of the torque transmission device 88 are parallel to one another. Relative to a bottom side of the torque transmission device 88, which faces the top side 24 of the base body 20, and relative to a corresponding top side, the torque transmission device 88 is flat.

[0093] The torque transmission device 88 can be assigned a first envelope plane 90 on its underside and a second envelope plane 92 on its upper side. The first envelope plane 90 and the second envelope plane 92 are oriented parallel to each other and, in particular, perpendicular to the rotation axes 50, 58, 70, 80.

[0094] In one embodiment, the envelope planes 90, 92 are also parallel to the installation plane 26.

[0095] A first channel 94 with side walls is arranged on the top side 24 of the base body 20. The first gear 68, the first toothed belt 76, and the first pulley holder 52 are positioned in this first channel 94. A second channel 96 is provided in which the second gear 78, the second toothed belt 86, and the second pulley holder 56 are positioned. A cover 98 (see Figure 1) is assigned to the first channel 94 and the second channel 96, which covers these channels 94, 96 from above relative to the vertical axis 42.

[0096] Each channel 94, 96 can have its own cover or a common cover can be provided.

[0097] The drive motor 89 is mounted upright on the base body 20. It has a drive shaft with a drive axis 100. The drive axis 100 of the drive motor 89 is oriented transversely and in particular perpendicularly to the installation plane 26. The drive axis 100 is in particular parallel to the first axis of rotation 70 of the first gear 68. The first gear 68 is driven directly via the drive motor 89. The first gear 68, in turn, drives the rotation of the first disc holder 52 via the corresponding belt drive with the first toothed belt 76. Through the mechanical coupling with the second gear 78, the first gear 68 drives the rotation of the second gear 78 about the second axis of rotation 80 and thereby, in turn, the rotation of the second disc holder 56 about the second axis of rotation 58 via the belt drive with the second toothed belt 86.

[0098] Due to the arrangement of the gear wheels 68 and 78 and the coupling via the active wheels 72, 82, a direction of rotation of the first disc holder is opposite to a direction of rotation of the second disc holder 56.

[0099] In one embodiment (not shown in the drawings), the drive axis 100 is coaxial with the first rotational axis 70 of the first gear 78. In this embodiment, in particular, the drive motor 89 is positioned directly above the first gear 68. In the embodiment shown, the drive axis 100 is offset and, in particular, parallel to the first rotational axis 70 of the first gear 68. The drive motor 89 is positioned, in a sense, next to the first gear 68.

[0100] A pinion 102 is rotationally fixedly coupled to the drive motor 89. During operation of the drive motor 89, the pinion 102 rotates with a rotational axis coaxial with the drive axis 100. The pinion 102 acts as a spur gear on the first active gear 72 of the first gear 68 to drive its rotation about the first rotational axis 70.

[0101] In one embodiment, the drive motor 89 is positioned in the region of the rear end 32.

[0102] The drive motor 89 is positioned between the first gear 68 and the first side end 34.

[0103] A third corner region 104 can be assigned to the base body 20. This third corner region 104 lies between the first side end 34 and the rear end 32. The drive motor 89 is positioned in this third corner region 104.

[0104] The base head 12 has a first region 106, which is formed by the base body 20. This first region 106 is flat and plate-shaped. The torque transmission device 88 is positioned on the first region 106.

[0105] The base head 12 further comprises a second region 108. The second

[0106] Area 108 is located in the area of ​​the rear end 32 and is transverse to the first

[0107] Area 106 is oriented and has an extension in the height axis 42.

[0108] The drive motor 89 is arranged at the second region 108. In a cross-sectional view or a side view, the base head 12 with the first region 106 and the second region 108 has an L-shape (see Figure 5).

[0109] A free space 110 (see Figure 5) is formed on the base head 12 between the first region 106 and the second region 108. This free space 110 is bounded downwards relative to the vertical axis 42 by the first region 106 and thereby by the base body 20. Transversely thereto, in the direction of the longitudinal axis 38 toward the rear end 32, this free space 110 is bounded by the second region 108.

[0110] The free space 110 has a floor 112 at the first region 106, with the cover 98 being positioned at the floor.

[0111] The free space 110 on the base head 12 serves to accommodate a removable tank device 114, wherein the tank device 114 serves in particular to accommodate dirty fluid.

[0112] The first channel 94 and the second channel 96, and thus also their covers, form a first arm 116 and a second arm 118, respectively. This first arm 116 and second arm 118 are at an acute angle to one another with respect to corresponding longitudinal axes (the longitudinal axis of the first arm 116 runs between the first rotational axis 50 of the first disc holder 52 and the first rotational axis 70 of the first gear 68, and the longitudinal axis of the second arm 118 runs between the second rotational axis 58 of the second disc holder 56 and the second rotational axis 80 of the second gear 78). The distance between the first arm 116 and the second arm 118 along the transverse axis 40 is greater at the front end 30 than in a direction away from the front end 30.

[0113] The first arm 116 and the second arm 118 form a V-shape; the channels 94, 96 are arranged in a V-shape. A holder 120 is positioned on the base body 20 between the first arm 116 and the second arm 118. The joint device 16 is, in turn, seated on this holder 120.

[0114] The first channel 94 and the second channel 96 have a common connecting area 122, where the arms 116 and 118 meet. The first gear 68 and the second gear 78 are positioned in this connecting area 122.

[0115] The drive motor 89 engages the torque transmission device 88 with the pinion 102 in this connecting area 122 in a torque-effective manner.

[0116] A drive side of the torque transmission device 88 (gearbox) via coupling to the drive motor 89 is located at the connecting region 122. An output side of the torque transmission device 88 for the first cleaning tool 44 and the second cleaning tool 46 is located at ends of the arms 116, 118, which face the front end 30 of the floor head 12.

[0117] Above the torque transmission device 88, a space is formed via the free space 110, with the drive motor 89 positioned outside this space (free space 110). This accordingly provides the free space 110 for accommodating the tank device 114.

[0118] It can be provided that the cover 98 serves as a support surface for the tank device 114.

[0119] The cover 98 is designed to be flat, in particular on its upper side, with a plane which is preferably parallel to the installation plane 26.

[0120] In one embodiment, a support device 124, particularly with wheels, is arranged on the floor head 12 in the region of the rear end 32. This support device 124 serves to support the floor head 12 during non-cleaning operation, particularly during transport of the floor cleaning machine 10.

[0121] In a top view, based on a projection of the rotation axes 50, 58, 70, 80, a quadrilateral 126 (see Figure 4) is formed. This quadrilateral 126 is trapezoidal.

[0122] A projection of the drive axis 100 onto the installation plane 26 lies outside this quadrilateral 126 or at the edge of this quadrilateral.

[0123] In the embodiment shown in Figure 4, the projection of the drive axis 100 is outside this quadrilateral 126.

[0124] In one embodiment, the first gear 68 and the second gear 78 are offset from one another relative to the longitudinal axis 38. In particular, the first gear 68 is located closer to the rear end 32 than the second gear 78. This results in a space-saving design with an optimized arrangement of the drive motor 89 in the third corner region 14.

[0125] In particular, it is also provided that the first arm 116 lies at a different acute angle to the longitudinal axis 38 than the second arm 118.

[0126] The support rod device 14 is connected to the base head 12 via the joint device 16. The joint device 16 is, in particular, a cardanic joint device with a first pivot axis 128 and a second pivot axis 130. The first pivot axis 128 and the second pivot axis 130 are oriented transversely and, in particular, perpendicularly to one another.

[0127] The first pivot axis 128 is in particular parallel to the installation plane. In one embodiment, the first pivot axis 128 is perpendicular to the longitudinal axis 38 and parallel to the transverse axis 40. The spatial position of the second pivot axis 130 depends on a pivot position about the first pivot axis 128.

[0128] The holding rod device 14 comprises a rod device 132 with a rod 134, which is articulated via the joint device 16 to the base head 12 and thereby to the holder 12.

[0129] The connecting area 122 is positioned between the holder 120 and the rear end 32 on the base body 20 of the base head 12.

[0130] A housing device 136 is located on or includes the rod device 132.

[0131] The housing device 136 is positioned at a distance from the base head 12 and in particular also at a distance from the joint device 16 on the rod device 132.

[0132] A battery device 138, in particular with rechargeable batteries, for supplying power to the floor cleaning machine 10 is located on the housing device 136.

[0133] Furthermore, a tank device 142 is positioned on the rod device 132 and in particular on the housing device 136. The tank device 142 comprises a tank for cleaning fluid, wherein the tank device 142 is in particular removably mounted on the housing device 136.

[0134] The rod device 132 is articulated to the base head 12 in the region of a distal end via the joint device 16. In the region of a proximal end, the support rod device 14 comprises a link 144 with opposing arms 146a, 146b. An operator can grasp each arm 146a, 146b with one hand.

[0135] In one embodiment, a blower device 140, which generates a suction flow during a cleaning operation, is arranged on the floor head 12, in particular on the second region 108.

[0136] The holding rod device 14 has an operating device 148 on the handlebar 144 between the arms 146a, 146b, on which in particular the floor cleaning machine 10 can be switched on and off, and on which parameters for a cleaning operation can be set.

[0137] In one embodiment, a display device 150 is integrated into the operating device 148, which displays operating parameters of the floor cleaning machine 10 (such as fill levels for tank devices, charge state of the battery device 138 and so on).

[0138] The tank device 114 for dirty fluid, which is removably positioned on the base head 12, is designed in its geometric shape to match the design of the base head 12 with the first region 106 and the second region 108 and also the holder 120.

[0139] In particular, the tank device 114 for dirty fluid comprises an intermediate region 152 so that it can be pushed over the holder 120 (and possibly also the joint device 16) (see Figure 1).

[0140] A suction bar 154 is arranged on the floor head 12 in the region of the rear end 32. During operation of the floor cleaning machine 10, the suction bar 154 is subjected to a suction flow from the blower device 140.

[0141] The suction bar 154 has a lip structure which, during operation of the

[0142] Floor cleaning machine 10 rests against the floor 18 to be cleaned. The lip structure lies on the support plane 26, wherein it is arranged and / or designed in particular to be elastic.

[0143] The floor cleaning machine 10 has a fluid guide device configured such that the suction flow generated by the blower device 140 acts on the suction bar 154 and thus on the floor 112 to be cleaned at the suction bar 154. This sucks in dirty fluid. The fluid guide device then couples the dirty fluid into the tank device 114 for dirty fluid, which is located on the floor head 12 during operation of the floor cleaning machine 10.

[0144] To empty the tank device 114, it can be removed from the base head 12.

[0145] A supply device 156 for cleaning fluid is arranged on the floor head 12 (on the support rod device 14). This supply device 156 can be used, in particular, to adjust the operating device 148 to supply cleaning fluid directly from the tank device 142 to the floor 112 to be cleaned.

[0146] In the embodiment shown, it is provided that cleaning fluid is supplied to the cleaning tools 44, 46 in the area of ​​the disc holders 52, 56 via the supply device 156 and is supplied centrally in particular.

[0147] An embodiment was described above in which the first rotational axis 54 of the first cleaning tool runs on an (imaginary) conical surface, and the second rotational axis 60 of the second cleaning tool 46 also runs on an (imaginary) conical surface. As mentioned, this allows for propulsion. The precession of the respective rotational axis 54, 60 relative to the corresponding rotational axis 50, 58 can be achieved, for example, via a bearing provided with axial play and by an inclination device for the cleaning tools 44, 46.

[0148] In this embodiment, in particular the torque transmission device 88 is arranged such that its axes of rotation are oriented perpendicular to the installation plane 26 and in particular also the drive axis 100 of the drive motor 89 is oriented perpendicular to the installation plane 26.

[0149] It is also possible in principle for the torque transmission device 88 to be slightly inclined with respect to its rotational axes relative to the installation plane 26, and then the first rotational axis 50 and the associated first rotational axis 54 are coaxial, and the second rotational axis 60 and its associated second rotational axis 58 are coaxial.

[0150] The floor cleaning machine 10 according to the invention functions as follows:

[0151] For floor cleaning, the tank device 114 is fixed to the floor head 12. The floor cleaning machine 10 is positioned above the installation level 26 of the floor head 12 on the floor 18 to be cleaned. An operator stands on the floor 18 behind the floor cleaning machine 10 and grasps the arms 146a and 146b with one hand each.

[0152] The drive motor 89 drives the first cleaning tool 44 and the second cleaning tool 46 in their respective rotation about the first rotation axis 54 and the second rotation axis 60 in a two-stage transmission via the torque transmission device 88.

[0153] Propulsion occurs due to the precession of the rotation axes 54, 60 relative to the installation plane 26. The articulated device 16 allows an operator to steer the floor cleaning machine 10 across the floor 18 to be cleaned. This results in high maneuverability.

[0154] The supply device 156 applies cleaning fluid (in particular water, optionally with surfactant additives) to the floor 16 to be cleaned, with the primary application being effected, in particular, to the cleaning tools 44, 46. The mechanical action of the cleaning tools 44, 46 removes dirt from the floor 18, which is in particular a hard floor. The suction bar 154 can be used to suction off the dirt fluid (liquid, liquid with dissolved dirt, or optionally dry dirt) and feed it into the tank device 114.

[0155] In the solution according to the invention, the torque transmission device 88 for the first cleaning tool 44 and the second cleaning tool 46 comprises a two-stage transmission with the first gear 68 and the belt drive, or the second gear 78 and the belt drive. This two-stage transmission is flat. It requires little space. This results in extremely smooth running. Each cleaning tool 44, 46 is driven by its own belt drive (with its own toothed belt 76 or 78). A cover 98 of the torque transmission device 88 can in principle be used as a support surface for the tank device 114.

[0156] The drive motor 89 is arranged "next to" the torque transmission device 88 (next to the gearbox 88). This results in optimized space utilization, particularly for accommodating the tank device 114. This, in turn, allows the tank device 114 to be designed with a relatively high volume.

[0157] In the solution according to the invention, both the first cleaning tool 44 and the second cleaning tool 46 are driven synchronously in opposite directions of rotation by a drive motor 89. This counter-rotation of the cleaning tools 44, 46 is achieved by coupling the second gear 78 to the first gear 68.

[0158] The drive motor 89 is mounted in a vertical position; the drive axis 100 is located transversely to the installation plane 26, in particular an angle of the

[0159] Drive axis 100 to the installation plane 26 is in the range between 80° and 110° and in particular there is a vertical orientation.

[0160] List of reference symbols

[0161] Floor cleaning machine

[0162] Ground head

[0163] Holding rod device

[0164] Joint device

[0165] Floor

[0166] Base body

[0167] bottom

[0168] Top

[0169] Installation level

[0170] Support wheels

[0171] front end

[0172] back end first page end second page end

[0173] Longitudinal axis

[0174] transverse axis

[0175] Height axis first cleaning tool second cleaning tool

[0176] Effective area first rotational axis of the first disc holder first disc holder first rotational axis second disc holder second rotational axis of the second disc holder second rotational axis a, 62b top side first corner area second corner area first gear first rotational axis of the first gear first effective wheel first pulley first toothed belt second gear second rotational axis of the second gear second effective wheel second pulley second toothed belt

[0177] Torque transmission device

[0178] Drive motor first envelope plane second envelope plane first channel second channel

[0179] cover

[0180] drive axle

[0181] Pinion third corner area first area second area

[0182] Free space

[0183] Floor

[0184] Tank device first arm second arm

[0185] holder

[0186] Connection area

[0187] Support device

[0188] Square first swivel axis second swivel axis

[0189] Rod facility

[0190] Rod Housing device Battery device Blower device Tank device Handlebar a, 146b Arm

[0191] Operating device Display device Intermediate area Suction bar Feed device

[0192] Tilt device

Claims

Patent claims 1. A floor cleaning machine comprising a floor head (12) assigned a support plane (26) for a floor (18) to be cleaned, a first disc holder (52), and a first cleaning tool (44), wherein the first disc holder (52) is arranged on the floor head (12) and holds the first cleaning tool (44) and is driven to rotate about a first axis of rotation (50) during operation of the floor cleaning machine, a second disc holder (56) and a second cleaning tool (46), wherein the second disc holder (56) is arranged on the floor head (12) and holds the second cleaning tool (46) and is driven to rotate about a second axis of rotation (58) during operation of the floor cleaning machine, wherein the first axis of rotation (50) of the first disc holder (52) and the second axis of rotation (58) of the second disc holder (56) are each oriented transversely to the support plane (26),a drive motor (89) for the first disc holder (52) and the second disc holder (56), which is seated on the base head (12), a torque transmission device (88) which is torque-effectively coupled to the drive motor (89) and ensures torque transmission to the first disc holder (52) and the second disc holder (56), and a holding rod device (14) which is movably hinged to the base head (12), characterized in that the torque transmission device (88) has a first gear (68) which is torque-effectively coupled to the first disc holder (52) via a first toothed belt (76), and a second gear (78) which is torque-effectively coupled to the second disc holder (56) via a second toothed belt (86).

2. Floor cleaning machine according to claim 1, characterized in that the drive motor (89) is coupled to the first gear (68) and drives the first gear (68) to rotate about a first axis of rotation (70), and in that the first gear (68) is coupled to the second gear (78), wherein the second gear (78) is driven to rotate about a second axis of rotation (80) of the second gear (78) by means of the first gear (68), and wherein the directions of rotation of the rotation about the first axis of rotation (70) and the second axis of rotation (80) are opposite.

3. Floor cleaning machine according to claim 2, characterized by at least one of the following: the first axis of rotation (70) of the first gear (68) and the second axis of rotation (80) of the second gear (78) are parallel to one another; the first axis of rotation (70) of the first gear (68) and the second axis of rotation (80) of the second gear (78) are oriented transversely and in particular perpendicularly to the installation plane (26); the first axis of rotation (70) of the first gear (68) is oriented parallel to or at an acute angle of at most 10° to a first axis of rotation (54) of the first cleaning tool (44); the second axis of rotation (80) of the second gear (78) is oriented parallel to or at an acute angle of at most 10° to a second axis of rotation (60) of the second cleaning tool (46).

4. Floor cleaning machine according to claim 2 or 3, characterized in that the first gear (68) has a first active wheel (72) and a first belt wheel (74), which are connected to one another in a rotationally fixed manner with the first axis of rotation (70) of the first gear (68) as a common axis of rotation, that the second gear (78) has a second active wheel (82) and a second belt wheel (84), which are connected to one another in a rotationally fixed manner with the second axis of rotation (80) of the second gear (78) as a common axis of rotation, and that the first active wheel (72) is directly coupled to the second active wheel (82) and that the first toothed belt (76) is guided on the first belt wheel (74) and the second toothed belt (86) is guided on the second belt wheel (84).

5. Floor cleaning machine according to claim 4, characterized in that the drive motor (89) is torque-effectively coupled to the first active wheel (72) via a pinion (102).

6. Floor cleaning machine according to one of the preceding claims, characterized in that all axes of rotation (50; 58; 70; 80) of the torque transmission device (88) are aligned parallel to one another and in particular a drive axis (100) of the drive motor (89) is aligned parallel to these axes of rotation (50; 58; 70; 80).

7. Floor cleaning machine according to one of the preceding claims, characterized in that during operation of the floor cleaning machine the first cleaning tool (44) rotates about a first axis of rotation (54) and that the second cleaning tool (46) rotates about a second axis of rotation (60) with at least one of the following: the first axis of rotation (54) and the second axis of rotation (60) are at an acute angle to the installation plane (26); the first rotation axis (54) lies at an acute angle to the first rotation axis (50) of the first disc holder (52); the second rotation axis (60) lies at an acute angle to the second rotation axis (58) of the second disc holder (56).

8. Floor cleaning machine according to one of the preceding claims, characterized in that the first gear (68) and the second gear (78) 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 (26).

9. Floor cleaning machine according to one of the preceding claims, characterized in that the drive motor (89) has a drive axis (100) with at least one of the following: the drive axis (100) is oriented transversely and in particular perpendicularly to the installation plane (26); the drive axis (100) is oriented parallel to a first axis of rotation (70) of the first gear (68); the drive axis (100) is oriented parallel to a second axis of rotation (80) of the second gear (78); the drive axis (100) is spaced apart and in particular parallel to a first axis of rotation (70) of the first gear (68) and a second axis of rotation (80) of the second gear (78).

10. Floor cleaning machine according to claim 9, characterized in that projections of the first axis of rotation (50) of the first disc holder (52), the second axis of rotation (58) of the second disc holder (56), the first axis of rotation (70) of the first gear (68) and the second axis of rotation (80) of the second gear (78) onto the installation plane (26) form a quadrilateral (126) and in particular a trapezoid, and that a projection of the drive axis (100) onto the installation plane (26) lies outside the quadrilateral (126) or at an edge of the quadrilateral (126).

11. Floor cleaning machine according to one of the preceding claims, characterized in that the torque transmission device (88) with the first gear (68), the second gear (78), the first disc holder (52) and the second disc holder (56) encloses a space, and that the drive motor (89) is positioned outside this space or at the edge of this space and is in particular laterally coupled to the torque transmission device (88) in a torque-effective manner.

12. Floor cleaning machine according to claim 10, characterized in that a tank device (114) is arranged above the space with at least a partial area relative to a height axis (42) of the floor head (12).

13. Floor cleaning machine according to one of the preceding claims, characterized in that a cover (98) of the torque transmission device (88) has a flat upper side, which is in particular parallel to the installation plane (26).

14. Floor cleaning machine according to one of the preceding claims, characterized by at least one of the following: a tank device (114), in particular removably, is positioned above a cover (98) of the torque transmission device (88) relative to a vertical axis (42) of the floor head (12); the cover (98) forms a support surface for a tank device (114).

15. Floor cleaning machine according to one of the preceding claims, characterized in that the first toothed belt (76) and the second toothed belt (86) are of the same design.

16. Floor cleaning machine according to one of the preceding claims, characterized in that the first toothed belt (76) and the second toothed belt (86) are each guided geometrically torsion-free on the torque transmission device (88).

17. Floor cleaning machine according to one of the preceding claims, characterized in that the first toothed belt (76) and the second toothed belt (86) 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 (26).

18. Floor cleaning machine according to one of the preceding claims, characterized in that the floor head (12) has a front end (30), a rear end (32) facing away from the front end (30), a first side end (34) and a second side end (36), with at least one of the following: the first disc holder (52) and the second disc holder (56) are located in the region of the front end (30); the first gear (68) is at a greater distance from the first side end (34) than the first disc holder (52); the second gear (78) is at a greater distance from the second side end (36) than the second disc holder (56); the first gear (68) and the second gear (78) are closer to the rear end (32) than the first disc holder (52) and the second disc holder (56); the first gear (68) is closer to the rear end (32) than the second gear (78); a drive axis (100) of the drive motor (89) is closer to the rear end (32) than a first rotation axis (70) of the first gear (68); a drive axis (100) of the drive motor (89) is closer to the first side end (34) than a first rotation axis (70) of the first gear (68).

19. Floor cleaning machine according to one of the preceding claims, characterized in that the first gear (68) and the second gear (78) differ in their number of teeth with respect to the coupling with one another, wherein the difference is in particular one.

20. Floor cleaning machine according to one of the preceding claims, characterized in that the first disc element (52) and the second disc element (56) lie on one plane with respect to a respective underside and / or respective top side.

21. Floor cleaning machine according to one of the preceding claims, characterized in that the torque transmission device (88) is flat with a first envelope plane (90) on an underside of the torque transmission device (88) and a second envelope plane (92) on an upper side of the torque transmission device (88), wherein the underside faces the installation plane (26), and wherein the first envelope plane (90) and the second envelope plane (92) are parallel to one another and in particular parallel to the installation plane (26).

22. Floor cleaning machine according to one of the preceding claims, characterized in that at least one suction bar (154) is arranged on the floor head (12), which is fluidly coupled to a blower device (140).

23. Floor cleaning machine according to one of the preceding claims, characterized in that a tank device (114) for dirty fluid is removably arranged on the floor head (12).

24. Floor cleaning machine according to one of the preceding claims, characterized in that a blower device (140) for generating a suction flow is arranged on the floor head (12).

25. Floor cleaning machine according to one of the preceding claims, characterized in that at least part of a supply device (156) of cleaning liquid to a floor (18) to be cleaned and / or to the first cleaning tool (44) and / or to the second cleaning tool (46) is arranged on the floor head (12).

26. Floor cleaning machine according to one of the preceding claims, characterized in that at least one of the following is arranged on the support rod device (14): a tank device (142) for cleaning fluid; a battery device (138).

27. Floor cleaning machine according to one of the preceding claims, characterized in that the holding rod device (14) comprises a handlebar (144).

28. Floor cleaning machine according to one of the preceding claims, characterized in that the holding rod device (14) is gimbal-mounted to the floor head (12) with a first pivot axis (128) and a second pivot axis (130), wherein the second pivot axis (130) is oriented transversely and in particular perpendicularly to the first pivot axis (128), and wherein in particular the first pivot axis (128) is at least approximately parallel to the installation plane (26).

29. Floor cleaning machine according to one of the preceding claims, characterized in that the floor head (12) has a first region (106) on which the torque transmission device (88) is seated, and a second region (108) on which the drive motor (89) is seated, wherein the second region (108) is positioned in a region of a rear end (32) of the floor head (12) and is oriented transversely to the first region (106), and that a free space is formed between the first region (106) and the second region (108) for receiving a tank device (114).

30. Floor cleaning machine according to claim 29, characterized in that a holder (120) for articulating the holding rod device (14) is seated on the first region (106), wherein the first gear (68) and the second gear (78) are positioned in a region between the holder (120) and a rear end (32) of the floor head (12).

31. Floor cleaning machine according to claim 30, characterized in that a cover (98) of the torque transmission device (88) has, in a plan view, a V-shaped configuration with a first arm (116) and a second arm (118) which are oriented at an acute angle to one another, wherein the holder (120) is positioned between the first arm (116) and the second arm (118).

Images