Floor cleaning machine

Abstract

A floor cleaning machine comprises a base and a driven cleaning element assembly for engaging with the floor, and a driving motor for driving the cleaning element assembly, wherein the cleaning element assembly comprises an inner cleaning element and an outer cleaning element, the inner cleaning element comprises an inner cleaning body and the outer cleaning element comprises an outer cleaning body, and the cleaning element extends from the cleaning body toward a side away from the plane of the cleaning body, the inner cleaning body comprises a first receiving opening, the outer cleaning body comprises a second receiving opening, the inner cleaning body is arranged in the second receiving opening, the output shaft extends into the first receiving opening and the second receiving opening with an output shaft section, a first eccentric element is installed on the output shaft section, the first eccentric element is connected to the inner cleaning body so that the inner cleaning body performs eccentric movement when the output shaft rotates, and a second eccentric element is installed on the output shaft section, the second eccentric element is connected to the outer cleaning body so that the outer cleaning body performs eccentric movement when the output shaft rotates.

Description

Technical Field

[0001] The invention relates to a floor cleaning machine, in particular a scrubber-suction machine, having a cleaning element assembly for engaging with a floor to be cleaned. Background Art

[0002] Such a floor cleaning machine comprises a base and a cleaning element assembly arranged on the bottom side of the base, which is movably held and driven, and which has a driven brush that can engage with the floor to be cleaned. Here, the brush is used in particular for scrubbing the floor. In addition, the floor cleaning machine comprises a drive motor preferably arranged on the base for driving the cleaning element assembly and an operating vertical rod preferably movably, in particular pivotably mounted on the base by a joint, which is used to guide and operate the floor cleaning machine. Here, the machine can be directly guided and operated by the user, or it can be mounted on a chassis and operated from there.

[0003] Therefore, a floor cleaning machine is known from EP 2 962 614 B1, which has a base and an operating vertical rod extending away from the base and connected to the base by a joint. In addition, two cleaning elements driven in opposite directions are provided on the base, and the rotation axes of these cleaning elements are inclined to each other relative to the vertical direction. In this way, it is achieved that when these two cleaning elements rotate, a propulsion force is applied to the base of the floor cleaning machine. However, since these cleaning elements are inclined to each other, the cleaning effect in the area of ​​the rotationally driven cleaning elements is uneven. More precisely, the cleaning elements are not too strong against the ground to be cleaned at the outer edge, so the cleaning effect there is relatively poor. In addition, the propulsion force continuously generated by the rotationally driven cleaning elements is often disadvantageous during operation. Because the user must apply a large force to move the floor cleaning machine away from the propulsion direction in other directions.

[0004] Furthermore, DE 44 25 782 C2 discloses a cleaning head for a floor cleaning machine, in which eccentric elements arranged in a first plane are provided on the base. These eccentric elements are connected to cleaning elements arranged in a second plane, which extends at a distance from the first plane. Therefore, the cleaning head according to this prior art is associated with a relatively high structural height and is therefore not suitable for floor cleaning machines that are manually operated by means of an operating lever, such as those known from EP 2 962 614 B1.

[0005] In addition, a floor cleaning machine is known from the prior art, which has a chassis, wherein the brush head of the floor cleaning machine has two brushes arranged side by side and rotating in opposite directions. However, such floor cleaning machines are usually relatively large and difficult to operate or cannot be operated at all in a small space.

[0006] It is therefore an object of the present invention to provide a floor cleaning machine which is of particularly compact design and which cleans floors efficiently, wherein the floor cleaning machine is also easy to control. Summary of the invention

[0007] According to the present invention, this object is achieved by a floor cleaning machine having a base and a cleaning element assembly held on the bottom side of the base and driven for engaging with the floor, and a drive motor having an output shaft for driving the cleaning element assembly, wherein the output shaft can be rotationally driven by the drive motor and extends along an output axis.

[0008] Preferably, an operating vertical rod for guiding and manipulating the floor cleaning machine is mounted on the base. Alternatively, it can also be realized that a driven chassis for moving on the floor to be cleaned is provided, which is automatically or manually controlled, wherein the base is fixed on the chassis. According to the present invention, the cleaning element assembly has an inner cleaning element and an outer cleaning element arranged on the periphery of the inner cleaning element, wherein the inner cleaning element and the outer cleaning element can be driven so that each of these cleaning elements performs an eccentric motion, in which, when viewed perpendicularly to the plane of the cleaning body, each point of the cleaning element moves substantially in a circle around an axis extending parallel to the output axis, in which, when viewed perpendicularly to the plane of the cleaning body, the axes of the non-coincident points are different from each other, and in this eccentric motion, for the cleaning element, when viewed perpendicularly to the plane of the cleaning body, all points move in the direction of motion, wherein the eccentric motions of the inner cleaning element and the outer cleaning element are phase-shifted relative to each other, so that, when viewed perpendicularly to the plane of the cleaning body, the direction of motion of the points of the inner cleaning element is different from the direction of motion of the points of the outer cleaning element at any point in time.

[0009] According to the invention, the inner cleaning element has an inner cleaning body and the outer cleaning element has an outer cleaning body, wherein the cleaning bodies extend together in a cleaning body plane, and wherein the engagement element extends from the cleaning body to a side away from the cleaning body plane. The inner cleaning body has a first receiving opening, and the outer cleaning body has a second receiving opening, wherein the inner cleaning body is arranged in the second receiving opening.

[0010] The output shaft extends with an output shaft section into a first receiving opening and a second receiving opening, wherein a first eccentric element is mounted on the output shaft section, and the first eccentric element is connected to the inner cleaning body, so that when the output shaft rotates, the inner cleaning body performs an eccentric movement, wherein a second eccentric element is mounted on the output shaft section, and the second eccentric element is connected to the outer cleaning body, so that when the output shaft rotates, the outer cleaning body performs an eccentric movement, and wherein these eccentric movements are phase-shifted relative to each other.

[0011] Accordingly, the floor cleaning machine according to the invention has a base, on which an operating vertical rod is preferably mounted, which in turn serves to guide and operate the floor cleaning machine. The operating vertical rod is also preferably mounted pivotably on the base, so that the operating vertical rod can be pivoted relative to the base in any direction. The joint connecting the operating vertical rod and the base to each other is preferably designed so that when the operating vertical rod is rotated about its longitudinal axis, a torque is applied to the base, which is oriented so that the base is thus rotated about a vertical axis extending perpendicularly to the plane of the floor to be cleaned (on which the base with the cleaning element assembly is arranged).

[0012] Alternatively, however, the floor cleaning machine can also have an automatically or manually controlled driven chassis for moving on the floor to be cleaned, wherein the base is fixed to the chassis. The invention is therefore not limited to manually guided floor cleaning machines, in the case of which an operating vertical rod for guiding the floor cleaning machine is provided on the base, but also includes floor cleaning machines with a chassis, in the case of which the user sits or stands on the floor cleaning machine or follows the floor cleaning machine.

[0013] In addition, a driving motor and a cleaning element assembly driven by the driving motor are fixed on the bottom side of the base of the floor cleaning machine according to the present invention, and the cleaning element assembly is configured to engage with the ground. According to the present invention, the cleaning element assembly has an inner cleaning element and an outer cleaning element arranged on the periphery of the inner cleaning element, wherein these cleaning elements can be driven so that they implement eccentric motion relative to each other in the cleaning body plane. In the case of eccentric motion, for each cleaning element, perpendicular to the cleaning body plane, each point of the corresponding cleaning element implements circular motion around the axis, wherein for the points that do not overlap when observed perpendicular to the cleaning body plane, the axes are different from each other. This means that these cleaning elements do not move around the axis as a whole, but each individual point of the corresponding cleaning element implements its own circular motion around its axis. In addition, the eccentric motion of the outer cleaning element is phase-shifted relative to the eccentric motion of the inner cleaning element, so that perpendicular to the cleaning body plane, the point of the inner cleaning element moves in a direction that is different from the direction of motion of the point of the outer cleaning element at any time. Therefore, these cleaning elements do not implement consistent orientation motion.

[0014] Two cleaning elements, i.e., an inner cleaning element and an outer cleaning element, have cleaning bodies, which are mounted on a base so that both of them extend in a cleaning body plane. This means that at least part of the inner cleaning body and at least part of the outer cleaning body extend in a common cleaning body plane, i.e., the cleaning body plane extends through these parts. Cleaning elements such as bristles and pads extend from the cleaning body toward the ground to be cleaned, and therefore extend from the cleaning body plane toward a side away from the cleaning body plane. During operation, the cleaning element and therefore the base with the cleaning element are placed on the ground to be cleaned with a free end away from the cleaning body.

[0015] The inner cleaning body has a first receiving opening and the outer cleaning body has a second receiving opening, wherein the receiving openings are designed such that the inner cleaning body is received in the second receiving opening of the outer cleaning body.

[0016] In order to drive the cleaning bodies so that they perform the eccentric movement already mentioned, the output shaft of the drive motor extends along the output axis into the first receiving opening and the second receiving opening, so that the output shaft section is arranged inside the opening. The latter means that the output shaft section is arranged inside the opening and surrounded by the cleaning bodies along a certain length between the upper end of one of the cleaning bodies in the direction of the output axis and the lower end of one of the cleaning bodies and thus along the output axis. A first eccentric element and a second eccentric element are mounted on the output shaft section, wherein the first eccentric element is connected to the first cleaning body and the second eccentric element is connected to the second cleaning body, so as to drive the cleaning bodies to perform a phase-shifted eccentric movement.

[0017] Therefore, in the structure according to the invention of the cleaning element assembly of the floor cleaning machine according to the invention, the eccentric element is arranged in a plane in which the cleaning body also extends. That is, the eccentric element is not offset from the cleaning body when viewed in the axial direction of the output axis, but is offset from the cleaning body in a region in which the cleaning body also extends axially when viewed along the output axis. Therefore, the drive device of the cleaning body according to the invention and therefore the structure of the cleaning element are associated with a very small structural height. Therefore, the drive motor can be arranged directly above the cleaning body of the cleaning element assembly, so that the overall structural height of the base is relatively small. Thus, the floor cleaning machine according to the invention can also be used in a region with relatively less space in the vertical direction.

[0018] Preferably, the first eccentric element has a first eccentric disk, which is non-rotatably connected to the output shaft section, and a first receiving element is mounted on the outer circumference of the first eccentric disk, so that the first receiving element can rotate relative to the first eccentric disk around a first rotation axis extending parallel to the output axis and arranged spaced apart therefrom, wherein the first receiving element is fastened to the inner cleaning body, wherein the second eccentric element has a second eccentric disk, which is non-rotatably connected to the output shaft section, and a second receiving element is mounted on the outer circumference of the second eccentric disk, so that the second receiving element can rotate relative to the second eccentric disk around a second rotation axis extending parallel to the output axis and arranged spaced apart therefrom, wherein the second receiving element is fastened to the outer cleaning body.

[0019] This structure allows the first cleaning body and the second cleaning body to perform an eccentric movement in a simple manner. That is, when the output shaft and thus the output shaft section are driven rotationally, the outer periphery of the eccentric disk performs an eccentric movement around the output axis. Furthermore, since the receiving element is rotatably arranged on the eccentric disk and is connected to the cleaning body element on the other side in a rotationally fixed manner, the cleaning body as a whole performs an eccentric movement.

[0020] In such a configuration, viewed along the output axis, the first eccentric disk and the second eccentric disk can be arranged one behind the other on the output shaft section in a further preferred manner and can be connected thereto.

[0021] In another preferred embodiment, the output shaft section extends over the region of the output shaft where the projection of the inner brush body or the outer brush body falls on the output shaft. In particular, viewed in the axial direction of the output shaft, the first eccentric element and the second eccentric element can be arranged in the region of the output shaft where the projection of the inner brush body or the outer brush body falls on the output shaft. Thus, in such an arrangement, the eccentric disk mounted on the output shaft section is completely located inside the region of the output shaft surrounded by the cleaning body, and the eccentric disk is therefore not arranged outside this region, thereby further minimizing the axial extension of the drive assembly.

[0022] In order to further minimize the extension size of the drive assembly and especially the cleaning element assembly in the axial direction of the output shaft, it is advantageous that the projection of the inner brush body on the output shaft overlaps the projection of the outer brush body on the output shaft at least partially. That is, in such a structure, the outer cleaning body surrounds the inner cleaning body.

[0023] In another preferred embodiment, the base has a drive motor holding element on which the drive motor is fixedly mounted, wherein first elastic elements are provided, which are fixedly connected to the inner cleaning body and the drive motor holding element, and second elastic elements are provided, which are connected to the outer cleaning body and the drive motor holding element. These elastic elements enable the cleaning element to be moved out of the rest position to a certain extent, but a rotation of the cleaning body is prevented. Therefore, based on these elastic elements, it is ensured that the cleaning body can actually only perform orbital movements, but a rotation is prevented.

[0024] In a further preferred manner, the drive motor holding element can be held on the base so as to be pivotable about a pivot axis extending parallel to the brush plane. This allows the cleaning body and thus the cleaning element to be oriented independently of the orientation of the base relative to the floor to be cleaned, wherein the orientation is to a certain extent independent of the forces exerted on the base by the operating lever if necessary.

[0025] Furthermore, guide wheels can be fixed on the base, which guide wheels can rotate around a common wheel axle. Such guide wheels make it possible that the direction of movement of the floor cleaning machine on the floor to be cleaned can be better preset by the user when an operating vertical rod is provided on the base. When the wheel axle and the pivot axis extend parallel to each other in a further preferred manner, the wheel is thus engaged with the floor to be cleaned, and a torque is applied to the base by means of the operating vertical rod, which is present if necessary, so that the wheel is pivoted relative to the drive motor holding element. Therefore, when the floor cleaning machine is moved in a direction perpendicular to the wheel axle, it is only necessary to apply a corresponding force to the base by means of the operating vertical rod. This further simplifies the operation.

[0026] It is also preferred that the eccentric movement of the inner cleaning element is phase-shifted by 180° from the eccentric movement of the outer cleaning element, so that the direction of movement of the points of the inner cleaning element is opposite to the direction of movement of the points of the outer cleaning element at any point in time, as viewed perpendicularly to the plane of the cleaning body. This achieves that the forces acting on the base by the eccentric movement of the cleaning element, which are generated by the engagement of the engagement element with the floor to be cleaned, cancel each other out, and that no restoring force is generated on the base, so that the base does not move in a specific direction. For this purpose, the output axis, the first rotation axis and the second rotation axis can extend in particular in a common plane.

[0027] In order to further ensure that the inertial forces and the restoring forces generated in the corresponding eccentric movement are offset due to the engagement of the cleaning elements with the floor to be cleaned, it is further preferred that the inner cleaning element and the outer cleaning element are designed so that their masses are the same, and / or the inner cleaning element and the outer cleaning element have engagement planes of the same size, with which the cleaning elements engage with the floor.

[0028] In a preferred embodiment of the floor cleaning machine according to the invention, the outer cleaning element has a triangular outer contour in the brush plane, wherein the sides of the triangular outer contour of the outer cleaning element can be designed to be convex in a further preferred manner. In such a structure, the floor cleaning machine according to the invention can also reach corners and angled areas of the floor to be cleaned.

[0029] It is also preferred that the second receiving opening has a triangular inner contour in the plane of the cleaning body and the inner cleaning element has a triangular outer contour in the plane of the cleaning body. This is achieved in this way: when the cleaning element is driven and the eccentric stroke is appropriately selected, there is no area between the two cleaning elements that is not touched by the cleaning elements of the cleaning element, so that the outer cleaning element and the inner cleaning element are joined together with the largest possible continuous surface. It is particularly preferred that the edges of the triangular outer contour of the outer cleaning element are designed to be convex.

[0030] However, the invention is not limited to cleaning elements having a triangular profile. It is also possible that the cleaning elements are designed as triangles, rectangles or trapezoids with straight sides in top view, wherein any tip which may be present is oriented differently from the preferred direction of movement of the machine, i.e. the tip points in the direction of movement or in the opposite direction.

[0031] In another preferred embodiment, the inner cleaning element and the outer cleaning element have bristles pointing toward the ground as coupling elements, wherein the bristles of the inner cleaning element include a first group of bristles, and wherein a portion of the first group of bristles is uniformly arranged in a first direction at an inclination relative to the output axis, while the bristles of the first group not included in the portion extend parallel to the output axis, and / or wherein the bristles of the outer cleaning element include a second group of bristles, and wherein a portion of the second group of bristles is uniformly arranged in a first direction at an inclination relative to the output axis, while the bristles of the second group not included in the portion extend parallel to the output axis.

[0032] In this embodiment, since a portion of the bristles is uniformly or in the same direction tilted relative to the output axis for a group of bristles on at least one cleaning element, this portion of the bristles resists movement on the floor with different resistances, depending on whether the movement is carried out in the tilted direction or in the opposite direction. This in turn achieves a propulsion force opposite to the tilted direction. For the non-tilted portion of the group of bristles, the resistance is always the same, so this portion does not contribute to or react to the propulsion force generated by the group. For example, in the case of a manually guided floor cleaning machine, the user can be assisted in moving and controlling the floor cleaning machine by the propulsion force generated by the group. The orientation of the inner cleaning element and / or the outer cleaning element can preferably be controlled so that the tilted bristles and therefore the propulsion force are oriented in the desired direction.

[0033] The bristle group in which part of the bristles is tilted towards a particular direction can include all bristles arranged on the cleaning element. Yet it is also conceivable that a certain amount of bristles is not a part for this group, for example those bristles obliquely installed on the cleaning element edge.

[0034] Furthermore, the floor cleaning machine according to the invention can have a cleaning liquid container in a preferred embodiment, which is preferably mounted on a base or an operating vertical rod, wherein devices are provided on the base, which are connected to the cleaning liquid container and are designed to apply cleaning liquid to the floor on which the floor cleaning machine is arranged.

[0035] In a further preferred manner, the floor cleaning machine can be provided with a suction foot mounted on the base or the operating vertical rod, so as to suck the cleaning liquid from the floor. In addition, a suction device can be mounted on the operating vertical rod or the base, which applies a suction air flow to the suction foot. In addition, a receiving container for the cleaning liquid connected to the suction device can be arranged on the operating vertical rod or the base, so that the cleaning liquid can be transported from the suction foot to the receiving container by means of the suction air flow.

[0036] However, it is also possible that a floor cleaning machine having the structure of the drive device for the cleaning element according to the invention is used together with another floor cleaning machine which is designed to be self-propelled and which supplies power to the drive motor, delivers the cleaning liquid and is used on an existing suction device to generate a suction air flow in the suction foot in order to suck away the cleaning liquid. This eliminates the need for a battery unit, a suction turbine, a cleaning liquid container and a dirty water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention is explained in more detail below with reference to the accompanying drawings which show only preferred exemplary embodiments, wherein

[0038] Figure 1 shows a perspective view of a floor cleaning machine according to the present invention,

[0039] Figure 2 Shows Figure 1 A cross-sectional view of the base of a floor cleaning machine,

[0040] Figure 3 Shown from below Figure 1 A perspective view of a cleaning element assembly of a floor cleaning machine, and

[0041] Figure 4 A cross-sectional view of a base of a floor cleaning machine is shown in an alternative embodiment. DETAILED DESCRIPTION

[0042] exist Figure 11 shows an embodiment of a floor cleaning machine 1 according to the invention, which is designed as a manually guided scrubber-suction machine and is provided with a cleaning element assembly and a suction foot, with which a floor 3 (see Figure 2 ) to apply cleaning liquid and the cleaning element assembly has a cleaning element for engaging with the floor 3 to be cleaned, with the suction foot being able to subsequently suck away the cleaning residues containing the cleaning liquid. The floor cleaning machine 1 described here has an operating lever 7, which is described in more detail below and is mounted on a base 5 of the floor cleaning machine 1, wherein the operating lever 7 is pivotally mounted on the base 5.

[0043] However, the invention is not limited to such manually guided floor cleaning machines 1 with an operating lever 7, but can also use floor cleaning machines with a chassis with which the floor cleaning machine can be moved over the floor to be cleaned, with the user either sitting or standing on the floor cleaning machine or walking behind the machine. Here, the floor cleaning machine can also be automatically controlled, so that the user does not need to guide it.

[0044] The described embodiment of the floor cleaning machine 1 according to the invention comprises the already mentioned base 5, on which the operating lever 7 is pivotably mounted via a joint 9. Here, the operating lever 7 extends from the joint 9, via which the operating lever is pivotably connected to the base 5, along the longitudinal axis 11 to the operating end 13. The joint 9 is designed here so that when the operating lever 7 is pivoted about the longitudinal axis 11, a torque is applied to the base 5, so that the base is pivoted about the vertical axis 15 relative to the ground 3, wherein the vertical axis 15 extends perpendicularly to the ground 3. The joint 9 thus makes it possible, due to its structure, that a user who grips the operating lever 7 at its operating end 13 can turn the base 5.

[0045] A cleaning liquid container 17 and a dirty water tank 19 are releasably mounted on the operating vertical rod 7, which are connected to the base 5 and the suction foot 21 pivotably held at the base 5 via lines 23, 25 in a manner to be described below. Here, the suction foot 21 can be pivoted between the position shown in the figure, in which the suction foot and the floor 3 to be cleaned are opposite, and an upwardly tilted position in which the suction foot and the floor 3 are spaced apart.

[0046] Finally, a cleaning element assembly 27 is provided on the bottom side of the base 5 facing the floor 3 to be cleaned, which is designed to engage with the floor 3 to be cleaned, wherein the cleaning element assembly 27 is driven by a drive motor 31 arranged in a housing 29 on the base. The drive motor 31 can be, for example, an electric motor powered by a battery unit not shown in the figure and mounted on the base 5 or the operating vertical rod 7. However, it is also conceivable in principle that the motor 31 is driven by compressed air. This can be the case when the floor cleaning machine 1 is used as an additional device on a self-driving machine.

[0047] A suction turbine 33 is also arranged in the housing 29 of the base 5, the suction side of which is connected to the upper end of the dirty water tank 19 via the line 25. The dirty water tank 19 is in turn connected to the suction foot 21 via the line 23. The suction turbine 33 constitutes a suction device, by means of which a suction air flow is generated from the suction foot 21 into the dirty water tank 19, so that the cleaning liquid can be sucked away from the floor 3 to be cleaned. Figure 2 It can also be seen that further lines 35 are provided in the base 5 , via which cleaning liquid can be applied from the cleaning liquid container 17 through the base 5 into the region of the cleaning element arrangement 27 and there onto the floor surface 3 to be cleaned.

[0048] As especially in Figure 2 It can be seen in the figure that the drive motor 31 has an output shaft 39 extending along the output axis 37 and driven by the drive motor 31. Observed in the axial direction of the output axis 37, the first eccentric disc 41 and the second eccentric disc 43 are sequentially mounted on the output shaft 39 in a rotationally non-rotatable manner. The first receiving element 45 is rotatably fastened to the outer periphery of the first eccentric disc 41 by means of a first bearing 47, wherein the first receiving element 45 is fixedly connected to the inner cleaning body 49 of the inner cleaning element 51. Here, the first receiving element 45 can rotate relative to the first eccentric disc 41 around the first rotation axis D1 extending parallel to the output axis 37. Here, the inner cleaning body 49 of the inner cleaning element 51 has a first receiving opening, in which the first receiving element 45 is received. In addition, the inner cleaning body 49 extends in a cleaning body plane 53, and when the floor cleaning machine is arranged on the floor 3 to be cleaned, the cleaning body plane extends substantially parallel to the plane of the floor 3 to be cleaned when the floor cleaning machine 1 is running.

[0049] In a similar manner, the second receiving element 55 is rotatably mounted on the outer periphery of the second eccentric disc 43 by means of a second bearing 57, wherein the second receiving element 55 is fixedly connected to the outer cleaning body 59 of the outer cleaning element 61. Here, the second receiving element 55 can rotate relative to the second eccentric disc 43 around the second rotation axis D2 extending parallel to the output axis 37 and the first rotation axis D1. Here, the outer cleaning body 59 has a second receiving opening, in which the second receiving element 55 is received on the one hand, and the inner cleaning body 49 of the inner cleaning element 51 is received on the other hand. Therefore, the outer cleaning body 59 surrounds the inner cleaning body 49, and the outer cleaning element 61 is arranged on the periphery of the inner cleaning element 51. In addition, the outer cleaning body 59 and therefore the outer cleaning element 61 also extend in the cleaning body plane 53.

[0050] The inner cleaning body 49 and the outer cleaning body 59 are arranged in the cleaning body plane 53, that is, at least part of the inner cleaning body 49 and the outer cleaning body 59 intersects with the cleaning body plane 53 when viewed in cross section. Figure 2 and Figure 3 It can be seen that the inner cleaning element 51 and the outer cleaning element 61 have engagement elements 63, which are fastened to the respective cleaning bodies 49, 59 and point toward the side of the cleaning body plane 53 that points toward the floor 3 to be cleaned. The engagement elements 63 are arranged to engage with the floor 3 to be cleaned. In the embodiment described here, the cleaning elements 63 are designed as bristles. However, it is also conceivable that the cleaning elements are made of pads or the like.

[0051] In the embodiment described here, the first and second eccentric discs 41, 43 are also arranged so that when the output shaft 39 rotates, the first and second rotation axes D1, D2 and the output axis 37 always extend in a common plane. In this connection, the eccentric discs 41, 43 are fastened to the output shaft 39 offset by 180° from each other.

[0052] exist Figure 2 It can also be seen in the figure that the output shaft 39 has an output shaft section 39', which extends into the first and second receiving openings of the inner cleaning body 49 and the outer cleaning body 59 and also extends over the area of ​​the output shaft 39, where the projection of the inner cleaning body or the outer cleaning body 49, 59 on the output shaft 39 falls. In this area, the first eccentric element 41 and the second eccentric element 43 are arranged in sequence as viewed in the axial direction of the output shaft 39. Finally, the cleaning bodies 49, 59 are constructed and fastened to the output shaft 39 by means of the eccentric disks 41, 43 and the receiving elements 45, 55, so that the projection of the inner cleaning body 49 on the output shaft 39 and the projection of the outer cleaning body 59 on the output shaft 39 at least partially overlap, so that the structure composed of the two cleaning bodies 49, 59 is as short as possible along the axial extension of the output axis 37.

[0053] In the embodiment described herein, the inner cleaning element 51 and the outer cleaning element 61 are also designed to have the same mass, and the inner cleaning element 51 and the outer cleaning element 61 have mating surfaces, which are composed of cleaning elements 63 connected thereto, and the cleaning elements utilize these mating surfaces to engage with the floor 3 to be cleaned, wherein the mating surfaces of the two cleaning elements 51, 61 have the same size.

[0054] In addition, especially in Figure 3 It can be seen in the figure: observe along the cleaning body plane 53, the outer cleaning element 51 has a triangular outer profile, wherein the side of the triangular outer profile is designed to be convex. In addition, the second receiving opening has a triangular inner profile in the cleaning body plane 53, and the inner cleaning element 51 also has a triangular outer profile in the cleaning body plane 53.

[0055] In addition, Figure 2 5 shows that a drive motor holding element 65 is provided on the base 5, on which the drive motor 31 is fixedly mounted. The drive motor holding element 65 is pivotably fixed relative to the base 5 by means of an elastic element 66, wherein the drive motor holding element 65 can be pivoted relative to the base 5 around a pivot axis 67 extending parallel to the cleaning body plane 53. In addition, the pivot axis 67 extends substantially perpendicularly to the direction in which the floor cleaning machine 1 moves forward during normal operation. Since the drive motor holding element 65 is pivotably fixed on the base 5 and is fixedly connected to the drive motor 31 and therefore to the cleaning element assembly 27, the cleaning elements 51, 61 can be pivoted relative to the base 5, and the orientation of the cleaning elements 51, 61 can be automatically adapted to the direction of the floor 3, without the user having to pivot the base 5 accordingly for this purpose.

[0056] exist Figure 2 It can also be seen that a first elastic element 69 is provided, which is fixedly connected to the inner cleaning body 49 on the one hand and to the drive motor holding element 65 on the other hand. In the same way, a second elastic element 71 is provided, which is fixedly connected to the outer cleaning body 59 on the one hand and to the drive body holding element 65 on the other hand. The elastic elements 69, 71 are designed here so that: even if they are fixedly connected to the drive body holding element 65 and the corresponding cleaning body 49, 59, these elastic elements still allow a limited movement of the cleaning body 49, 59 parallel to the cleaning body plane 53.

[0057] When the drive motor 31 is switched on and the output shaft 39 is rotating, the inner cleaning body 49 and the outer cleaning body 59, and therefore the inner cleaning element 51 and the outer cleaning element 61, all perform an eccentric movement around the output axis 37. Such an eccentric movement is distinguished by the fact that, viewed perpendicularly to the cleaning body plane 53, each point of the cleaning element 51 and the second cleaning element 61 moves substantially in a circle around an axis extending parallel to the output axis 37, but wherein the axes of the points that do not coincide when viewed perpendicularly to the cleaning body plane 53 are different from each other. Thus, in such an eccentric movement, for each cleaning element 51, 61, all points of the cleaning element 51, 61 move in a single direction of movement when viewed perpendicularly to the cleaning body plane 53 at any point in time.

[0058] Since the first and second rotation axes D1, D2 are arranged together with the output axis 37 in a common plane or the eccentric disks 41, 43 are simultaneously offset by 180°, the eccentric movements of the inner cleaning element 51 and the outer cleaning element 61 are phase-shifted relative to each other, so that the movement direction of the points of the inner cleaning element 51 is at any time opposite to the movement direction of the points of the outer cleaning element 61, as viewed perpendicularly to the cleaning body plane 53. As a result, the eccentric movements are phase-shifted by 180° relative to each other.

[0059] Because the cleaning bodies 49, 51 are connected to the drive motor holding element 65 via elastic elements 69, 71, these cleaning bodies can only move relative to the drive motor holding element 65 in a small range, the movement of the cleaning bodies 49, 59 is limited by the above-mentioned eccentric movement, and the cleaning bodies 49, 51 cannot rotate relative to the base 5 around their corresponding rotation axes D1, D2.

[0060] Furthermore, the masses and engagement surfaces of cleaning elements 51 , 61 are equally large, which together with the always opposing movements of cleaning elements 41 , 51 ensures that the forces and moments generated by the movement of cleaning elements 51 , 61 cancel each other out and no generated forces act on base 5 .

[0061] Finally, it can be seen in the figure that guide wheels 73 are fixed on the base 5 and can rotate about a common wheel axle 75. The wheel axle 75 extends parallel to the pivot axis 67 and therefore also parallel to the brush plane 53 and perpendicular to the direction in which the floor cleaning machine 1 moves on the floor 3 to be cleaned during normal operation. When the guide wheels 73 are placed on the floor 3 to be cleaned, the user does not have to apply a large force to the operating vertical rod 7, and the floor cleaning machine 1 can easily move in the direction defined by the wheel axle 75. Here, the guide wheels 73 can be mounted on the base 5 at such a height that these guide wheels are placed on the floor 3 to be cleaned only when a corresponding force is applied to the base 5 by means of the operating vertical rod 7 (based on this force, the base 5 is pivoted relative to the drive motor holding element 65 about the pivot axis 67). In such an arrangement of the guide wheels 73, it is up to the user to determine whether the machine should perform a linear movement or move without the guide wheels 73 contacting the floor 3.

[0062] When the above-mentioned floor cleaning machine 1 is in operation, the cleaning liquid is applied from the cleaning liquid container 17 to the floor 3 to be cleaned by the line 35, and the drive motor 31 is also in operation at the same time, so that the cleaning elements 51, 61 are driven to an eccentric motion, in which the coupling element 63 is coupled with the floor 3 to be cleaned and these coupling elements are cleaned together with the applied cleaning liquid. Since the eccentric motion of the two cleaning elements 51, 61 is phase-shifted by 180°, the generated force is not applied to the base 5 around the vertical axis 15 in particular. Thus, the user can guide the floor cleaning machine 1 in a simple manner by means of the operating vertical rod 7. Since the joint 9 is designed in the manner already described, the user can also change the orientation of the base 5 by rotating the operating vertical rod around the longitudinal axis 11 of the operating vertical rod 7. Since the cleaning bodies 51, 61 and especially the outer cleaning body 61 are designed to be triangular, the floor cleaning machine 1 can also be moved well in an angled area. Furthermore, during operation, when the floor cleaning machine 1 moves over the floor 3, the suction foot 21 again sucks cleaning fluid away from the floor 3 to be cleaned due to the suction air flow generated by the suction turbine 33. The contaminated cleaning fluid is collected in the dirty water tank 19.

[0063] However, it is also possible to implement Figure 4 In the case of the embodiment shown, the inner cleaning element 51 and the outer cleaning element 61 have bristles 77, 79 as engagement elements pointing toward the floor 3, wherein the bristles 77 of the inner cleaning element 51 comprise a first group of bristles 77. At least a portion of the first group of bristles, and in this embodiment all bristles 77 of the first group of bristles are uniformly arranged in a first direction obliquely relative to the output axis 37. In the same way, all bristles 79 of the outer cleaning element are uniformly arranged in a first direction obliquely relative to the output axis 37.

[0064] In this embodiment, since at least one group of bristles, and here even all bristles 77, 79, on the cleaning elements 51, 61 are tilted uniformly or in the same direction relative to the output axis 37, the bristles 77, 79 resist movement on the floor with different resistances, depending on whether the movement is carried out in the tilted direction or in the opposite direction. This in turn achieves a propulsion force in the opposite direction of the tilt. For example, in the case of a manually guided floor cleaning machine, the propulsion force thus generated can assist the user in moving and controlling the floor cleaning machine.

[0065] The bristle group in which at least a portion of the bristles are tilted in a particular direction may include all the bristles arranged on the cleaning element as described herein. However, it is also conceivable that a certain amount of bristles is not a part of the group, for example those bristles obliquely mounted on the edge of the cleaning element.

[0066] Since the assembly consisting of the drive motor 31 and the cleaning elements 51, 61 has only a very short structural length when viewed in the axial direction of the output axis 37, the height of the base 5 of the floor cleaning machine is very small, and the floor cleaning machine 1 can also move in a region where the space is greatly restricted in the vertical direction when the operating vertical rod 7 is pivoted greatly relative to the vertical direction. Therefore, in the structure according to the invention, the structural dimensions of the drive device of the cleaning elements 51, 61 are very small, which greatly expands the application possibilities of the floor cleaning machine 1 according to the invention. Based on the type of drive device for generating the eccentric movement of the cleaning elements 51, 61, which is preferably phase-shifted by 180°, it is also achieved that a uniform cleaning effect is achieved over the entire plane in which the cleaning elements 51, 61 engage with the floor 3 to be cleaned, and on the other hand, the generated torque is not applied to the base 5 of the floor cleaning machine 1.

[0067] In the above embodiment, the floor cleaning machine 1 has a suction turbine 33, a cleaning fluid container 17 and a dirty water tank 19 in addition to a battery unit. However, it is conceivable that the floor cleaning machine 1 having the structure of the above-mentioned drive device for the cleaning elements 51 and 61 is used together with another floor cleaning machine designed to be self-driving, and the other floor cleaning machine supplies power to the drive motor 31, conveys the cleaning fluid, and the other floor cleaning machine is used on the existing suction device to generate a suction air flow in the suction foot to suck away the cleaning fluid. As a result, there is no need to provide a battery unit, a suction turbine, a cleaning fluid container and a dirty water tank.

[0068] Reference numerals list:

[0069] 1 Floor cleaning machine

[0070] 3 Ground

[0071] 5 Base

[0072] 7 Operating lever

[0073] 9 Connectors

[0074] 11 Longitudinal axis

[0075] 13. Control end

[0076] 15 Vertical axis

[0077] 17 Cleaning fluid container

[0078] 19 Wastewater tank

[0079] 21. Foot Suction

[0080] 23 lines

[0081] 25 lines

[0082] 27 Cleaning element assembly

[0083] 29 Shell

[0084] 31 Drive motor

[0085] 33 Suction turbine

[0086] 35 lines

[0087] 37 Output axis

[0088] 39 Output shaft

[0089] 39' Output shaft section

[0090] 41 First eccentric disc

[0091] 43 Second eccentric disc

[0092] 45 first receiving element

[0093] 47 First bearing

[0094] 49 Internal Cleansing Body

[0095] 51 Internal cleaning element

[0096] 53 Cleaning body plane

[0097] 55 Second receiving element

[0098] 57 Second bearing

[0099] 59 External cleaning body

[0100] 61 External cleaning element

[0101] 63 Joint elements

[0102] 65 Drive motor holding element

[0103] 66 Elastic element

[0104] 67 Pivot axis

[0105] 69 first elastic element

[0106] 71 second elastic element

[0107] 73 Guide wheel

[0108] 75 Axle

[0109] 77 Bristles

[0110] 79 Bristles

Claims

1. A floor cleaning machine (1), comprising: base (5) and a driven cleaning element assembly (27) retained on the underside of the base (5) for engaging the floor surface (3), and a drive motor (31) having an output shaft (39) for driving the cleaning element assembly (27), wherein the output shaft (39) can be rotationally driven by the drive motor (31) and extends along an output axis (37), The cleaning element assembly (27) comprises an inner cleaning element (51) and an outer cleaning element (61) arranged on the periphery of the inner cleaning element (51). wherein the inner cleaning element and the outer cleaning element (51, 61) can be driven so that each of the cleaning elements (51, 61) performs an eccentric movement, in which each point of the cleaning element (51, 61) moves substantially in a circle around an axis extending parallel to the output axis (37) when viewed perpendicularly to the cleaning body plane (53), During the eccentric movement, the axes of the non-coincident points differ from one another, viewed perpendicularly to the cleaning body plane (53), and During the eccentric movement, for the cleaning elements (51, 61), all points move in the direction of movement when viewed perpendicularly to the plane (53) of the cleaning body at any point in time, wherein the eccentric movements of the inner cleaning element (51) and the outer cleaning element (61) are phase-shifted relative to each other, so that the direction of movement of the points of the inner cleaning element (51) is different from the direction of movement of the points of the outer cleaning element (61) at any point in time when viewed perpendicularly to the plane (53) of the cleaning body, The inner cleaning element (51) has an inner cleaning body (49), and the outer cleaning element (61) has an outer cleaning body (59), wherein the cleaning bodies (49, 59) extend together in the cleaning body plane (53), and wherein the engaging element (63) extends from the cleaning bodies (49, 59) toward a side away from the cleaning body plane (53), wherein the inner cleaning body (49) has a first receiving opening and the outer cleaning body (59) has a second receiving opening, wherein the inner cleaning body (49) is arranged in the second receiving opening, wherein the output shaft (39) extends with an output shaft section (39') into the first receiving opening and the second receiving opening, A first eccentric element (41, 45) is mounted on the output shaft section (39'), the first eccentric element is connected to the inner cleaning body (49), so that when the output shaft (39) rotates, the inner cleaning body (49) performs the eccentric movement; and a second eccentric element (43, 55) is mounted on the output shaft section (39'), the second eccentric element is connected to the outer cleaning body (59), so that when the output shaft (39) rotates, the outer cleaning body (59) performs the eccentric movement.

2. The floor cleaning machine according to claim 1, further comprising an operating vertical rod (7) mounted on the base (5) for guiding and manipulating the floor cleaning machine (1).

3. The floor cleaning machine according to claim 2, wherein the operating vertical rod (7) extends along a longitudinal axis and is pivotably mounted on the base (5) via a joint (9), so that the operating vertical rod can be pivoted relative to the base (5) in any direction, The joint (9) is designed so that when the operating lever (7) is rotated about its longitudinal axis (11), a torque is applied to the base (5), the torque being oriented so that the base (5) is thereby pivoted about a vertical axis (15) extending perpendicularly to the cleaning body plane (53).

4. A floor cleaning machine according to one of claims 1 to 3, wherein the first eccentric element has a first eccentric disc (41), the first eccentric disc is connected to the output shaft section (39') in a rotationally fixed manner, and a first receiving element (45) is mounted on the outer circumference of the first eccentric disc, so that the first receiving element can rotate relative to the first eccentric disc (41) around a first rotation axis (D1) extending parallel to the output axis (37) and arranged spaced apart therefrom, wherein the first receiving element (45) is fastened to the inner cleaning body (49), and The second eccentric element has a second eccentric disk (43), the second eccentric disk is connected to the output shaft section (39') in a rotationally fixed manner, and a second receiving element (55) is mounted on the outer circumference of the second eccentric disk, so that the second receiving element can rotate relative to the second eccentric disk (43) around a second rotation axis (D2) extending parallel to the output axis (37) and arranged spaced apart therefrom, wherein the second receiving element (55) is fastened to the outer cleaning body (59), and in, The first eccentric disk and the second eccentric disk (41, 43) are arranged one after the other on the output shaft section (39') as viewed along the output axis (37) and are connected to the output shaft section.

5. The floor cleaning machine according to one of claims 1 to 3, wherein the output shaft section (39') extends over a region of the output shaft (39) where a projection of the inner cleaning body or the outer cleaning body (59) falls on the output shaft (39).

6. A floor cleaning machine according to one of claims 1 to 3, wherein the first eccentric element (41) and the second eccentric element (43) are arranged in an area of ​​the output shaft (39) where a projection of the inner cleaning body or the outer cleaning body (49, 59) falls on the output shaft (39) when viewed in the axial direction of the output shaft (39).

7. The floor cleaning machine according to one of claims 1 to 3, wherein a projection of the inner cleaning body (49) onto the output shaft (39) at least partially overlaps a projection of the outer cleaning body (59) onto the output shaft (39).

8. The floor cleaning machine according to claim 1 , wherein a drive motor holding element ( 65 ) is provided on the base ( 5 ), on which a drive motor ( 31 ) is securely mounted, A first elastic element (69) is provided, which is fixedly connected to the inner cleaning body (49) and the drive motor holding element (65), and A second elastic element (71) is provided, which is fixedly connected to the outer cleaning body (59) and the drive motor holding element (65).

9. The floor cleaning machine according to claim 8, wherein the drive motor holding element (65) is movably held on the base (5).

10. Floor-cleaning machine according to claim 9, wherein the drive motor holding element (65) is held on the base (5) so as to be pivotable about a pivot axis (67) extending parallel to the cleaning body plane (53).

11. The floor cleaning machine according to claim 10, wherein guide wheels (73) are fixed to the base (5), the guide wheels being rotatable about a common wheel axle (75), and in, The axle (75) and the pivot axis (67) extend parallel to each other.

12. The floor cleaning machine according to claim 4, wherein the eccentric movement of the inner cleaning element (51) is phase-shifted by 180° from the eccentric movement of the outer cleaning element (61), so that when observed perpendicularly to the plane (53) of the cleaning body, the movement direction of the points of the inner cleaning element (51) is opposite to the movement direction of the points of the outer cleaning element (61) at any point in time, and in, The output axis (37), the first rotation axis (D1) and the second rotation axis (D2) extend in a common plane.

13. The floor cleaning machine according to one of claims 1 to 3 and 9 to 10, wherein the inner cleaning element (51) and the outer cleaning element (61) are designed such that their masses are of the same size, and / or The inner cleaning element (51) and the outer cleaning element (61) have engaging planes, and the cleaning elements (51, 61) engage with the ground surface (3) of the same size by means of the engaging planes.

14. Floor-cleaning machine according to one of claims 1 to 3 and 9 to 10, wherein the outer cleaning element (61) has a triangular outer contour in the cleaning body plane (53), and in, The legs (45) of the triangular outer contour of the outer cleaning element (61) are designed to be convex.

15. Floor-cleaning machine according to one of claims 1 to 3 and 9 to 10, wherein the second receiving opening has a triangular inner contour in the cleaning body plane (53), and The inner cleaning element (51) has a triangular outer contour (51) in the cleaning body plane (53).

16. The floor cleaning machine according to one of claims 1 to 3 and 9 to 10, wherein the inner cleaning element (51) and the outer cleaning element (61) have bristles as engagement elements pointing toward the floor (3), wherein the bristles of the inner cleaning element include a first group of bristles, and wherein a portion of the first group of bristles is uniformly arranged obliquely in a first direction relative to the output axis (37), while the bristles of the first group not included in the portion extend parallel to the output axis (37), and / or The bristles of the outer cleaning element include a second group of bristles, and a portion of the second group of bristles is uniformly arranged obliquely in a first direction relative to the output axis (37), while the bristles of the second group not included in the portion extend parallel to the output axis (37).

17. Floor cleaning machine according to one of claims 2 and 3, comprising a cleaning liquid container (17) which is mounted on the base or the operating vertical rod (7), A device is provided on the base, the device is connected to the cleaning liquid container (17) and is designed to apply cleaning liquid from the cleaning liquid container (17) to the floor (3) on which the floor cleaning machine (1) is arranged.

18. The floor cleaning machine according to claim 2, comprising a suction foot (21) mounted on the base (5) or the operating vertical rod (7) for sucking cleaning liquid from the floor (3), and A suction device (33) is installed on the operating vertical rod (7) or the base (5), and the suction device applies a suction air flow to the suction foot (21).

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