EP2954817B1 - Floor cleaning machine - Google Patents

Description

The present invention relates to a floor cleaning machine with a machine frame, mounted on a machine frame chassis for moving the floor cleaning machine on a floor surface to be cleaned, with a cleaning head which is so adjustably supported on the machine frame, that he in an engaged position in which the cleaning head with the Ground surface engages, lowered and can be raised therefrom, and with a squeegee that is so adjustably supported on the machine frame that it can be lowered into a contact position in which the squeegee rests on the bottom surface and raised therefrom.

Such floor cleaning machines, such as in the US-A-2558864 , are used to clean large areas of land, for example in public buildings or supermarkets. For this purpose, the machines are operated in such a way that when driving on such a floor surface to be cleaned first with the help of the cleaning head and provided thereon, preferably driven brushes with applied by the cleaning head liquid on the floor surface existing dirt is released. With the help of the squeegee then loaded with dirt liquid is sucked off again. In this case, both the cleaning head and the squeegee are height-adjustable mounted on the machine frame of the floor cleaning machine to allow both units are not necessarily in contact with the bottom surface.

During the operation of such a floor cleaning machine, the following operating modes or combinations of settings for the position of cleaning head and suction foot are basically required. First, it must be possible for both the cleaning head and the squeegee to be raised and out of contact with the floor surface, which is is necessary for a free ride the floor cleaning machine. Then a second operating mode is necessary for the pure suction operation, in which only the squeegee is lowered to the bottom surface in a contact position to still suck liquid located on the bottom surface, but the cleaning head is not in contact with the bottom surface.

Finally, a third mode of operation must be made possible in which both the cleaning head and the squeegee are in an engagement position with the bottom surface so that, on the one hand, the bottom surface is cleaned by means of the cleaning head and, on the other hand, dirt water is sucked therefrom by means of the squeegee.

Thus, in such a floor cleaning machine, lifting devices must be provided for both the squeegee and the cleaning head, and these lifting devices normally require separate drives, which involves considerable expense and space requirements.

Against this background, it is the object of the present invention to design a floor cleaning machine described above in such a way that the adjustment of the position of the cleaning head and suction in a structurally simple manner possible.

This object is achieved by a floor cleaning machine with a machine frame, with a mounted on the machine frame chassis for moving the floor cleaning machine on a floor surface to be cleaned, with a cleaning head which is mounted on the machine frame so height adjustable that he in an engaged position in which the cleaning head with the bottom surface engages, can be lowered and raised therefrom, with a squeegee, which is designed to suck liquid from the bottom surface and the machine frame is held in such a height adjustable, that it can be lowered into a contact position, in which the squeegee rests on the bottom surface and raised therefrom, with a movable adjusting element which is coupled to the cleaning head and the squeegee, and with a drive for the method of Adjusting element between a first, a second and a third position, wherein raised in the first position of the adjustment of the cleaning head from the engaged position and the squeegee are lifted from the contact position, wherein raised in the second position of the adjustment of the cleaning head from the engaged position and the squeegee is lowered into the contact position and wherein lowered in the third position of the adjustment of the cleaning head in the engaged position and the squeegee is lowered into the contact position.

• In einer ersten Position sind sowohl der Reinigungskopf als auch der Saugfuß von der Bodenfläche angehoben und entfernt davon, sodass weder der Reinigungskopf in der Eingriffsstellung noch der Saugfuß der Kontaktstellung mit der Bodenfläche ist. Bei dieser ersten Position des Verstellelements kann die Bodenreinigungsmaschine einfach über die Bodenfläche bewegt werden, ohne dass eine Reinigung davon erfolgt.

According to the floor cleaning machine has a single, movable by a drive adjustment, which is so mechanically coupled to both the cleaning head and with the squeegee that they are lowered or raised by the movement. Here, the adjusting element and the coupling with the cleaning head and the squeegee is designed so that in the at least three positions between which the adjusting element can be moved, the following settings of cleaning head and squeegee are realized:

• In a first position, both the cleaning head and the squeegee are raised from the bottom surface and away therefrom so that neither the cleaning head in the engaged position nor the squeegee is in contact with the bottom surface. In this first position of the adjustment, the floor cleaning machine can be easily moved over the bottom surface, without any cleaning done.

In the second position of the adjustment of the squeegee is lowered to the bottom surface to the extent that it is in the contact position, while the cleaning head is raised and is not in the engaged position of the bottom surface. In this position of the adjustment, the floor cleaning machine can drive over the bottom surface and thereby absorb liquid thereof by means of the squeegee, while the cleaning head is not in contact with the bottom surface.

Finally, the structure according to the invention makes it possible for the adjusting element to assume a third position, in which both are then lowered due to the coupling with the suction foot and the cleaning head and occupy the contact position or the engaged position. In this third position, on the one hand with the help of the cleaning head, the bottom surface is cleaned and on the other hand simultaneously sucked with the help of the squeegee contaminated liquid.

Thus, it is possible with the structure according to the invention to reduce by simply moving a single adjustment and with the help of a single drive, both the cleaning head and the squeegee and raise while still realize at least the three basically required combinations of positions of the cleaning head and the squeegee. Thus, it is no longer necessary to provide separate drives for the height adjustment of the cleaning head and squeegee.

Basically come as drives for moving the adjusting hydraulic and pneumatic actuators such as hydraulic or pneumatic cylinders in question. But it can also be used other mechanical drives, which have about electric motors and associated threaded spindles. The drives that can be used are also not limited to those that produce linear motion. Much more can also be used those whose output element performs a circular motion, so that the adjusting element then also performs a movement along at least a portion of a circular path.

In a preferred embodiment, the adjusting element can be moved to a fourth position, wherein in this fourth position of the adjustment of the cleaning head lowered into the engaged position with the bottom surface and the squeegee is lifted from the contact position. This fourth position may be desirable if a pre-cleaning of the soil is to be carried out in which only liquid applied to the bottom surface and the bottom surface is cleaned by possibly driven brushes of the cleaning head, but the water should initially remain on the bottom surface.

In a preferred embodiment, the squeegee and the adjusting element can be coupled to one another in such a way that an elastic element is arranged in the connection between the squeegee and the adjusting element. In the first and possibly fourth position of the adjustment in which the squeegee is raised and suspended above the floor surface, it often happens that a user, for example by means of his body weight, exerts a load on the squeegee in the direction of the floor surface. This load would, if no elastic element between adjustment and suction would be present, cause that possibly the squeegee tearing off the adjustment. However, when an elastic member is provided, it absorbs the load under elastic deformation.

Although it is conceivable that the adjusting element performs a movement along at least part of a circular path, along which the respective positions can be taken. However, it is preferred that the adjustment performs a rectilinear motion, since then the drive can be realized for example by an electromechanical linear drive, as is known from the prior art.

Further, it is preferred if the suction cup has a pivotally mounted on the machine frame holder, so that the squeegee can be raised by pivoting the holder from the contact position with the bottom surface and lowered into it, wherein the holder further comprises a lever arm, the free end of the Adjustment element is connected.

In this preferred embodiment, in which the adjusting element itself carries out a rectilinear movement, the suction cup is then raised or lowered by the adjusting element being connected to the free end of the lever arm. It is particularly preferred if this connection between the free end of the lever arm and the adjusting element has a spring element which receives by elastic deformation loads, which arise when the squeegee is raised and removed from the bottom surface.

Alternatively, it is also possible that the squeegee has a pivotally mounted on the machine frame holder so that the squeegee can be raised by pivoting the holder from the contact position and lowered into it. On the holder, a lever arm is provided, and further a pivotable coupling member is provided, which is connected to the free end of the lever arm. The coupling element in turn has a first guide track, which engages with the adjusting element, so that it can be moved therein. By moving the adjusting element in the first guide track, a pivoting position of the coupling element can be changed, which in turn results in that the holder as a result of the pivoting movement of the coupling element between the lowered Contact position and a raised position is pivoted.

Such a structure provides a simple way to implement the rectilinear movement of the adjustment in a pivoting movement of the holder. It is further preferred if between the pivotable coupling element and the lever arm of the holder in turn a spring or other elastic connecting element are provided, which can accommodate in the case of the raised suction on it exerted unforeseen loads.

In a further preferred embodiment, the cleaning head has an adjusting plate, in which a second guide track is formed, with which the adjusting element engages and is movable, so that a position of the adjusting plate is changed relative to the machine frame during the movement of the adjusting element along the second guide track. The second guide track in the actuator plate has such a course that the linear rectilinear movement of the actuator leads to a vertical movement of the actuator plate perpendicular to the plane of the bottom surface. By the course of the second guide track can be achieved in a simple manner that at a predetermined position of the adjusting along the rectilinear path of the cleaning head the desired vertical position, for example, the engaged position or a raised position occupies.

In this case, it is particularly preferred if the cleaning head is mounted on a holder which is pivotally mounted on the machine frame, wherein the setting plate is fastened to the holder so that the holder is pivoted during the movement of the adjusting element and into the engaged position in which the cleaning head engages with the bottom surface , lowered and raised from it. In this way, the vertical movement of the cleaning head can be realized in a simple manner, without the need for a complicated guide. It is only necessary to provide the pivotable support arm.

Alternatively, the cleaning head can also be connected via a cable element with the adjusting element. It is on the one hand possible that the cleaning head is in turn mounted on a pivotable holder, for example on the machine frame. Alternatively, however, a linear guide of the cleaning head is conceivable.

When the adjusting element performs a rectilinear motion, it is preferred that it is attached to the free end of the piston rod of an electromechanical linear drive. With such a linear drive, on the one hand, the desired positions can be approached reliably and, on the other hand, the required forces can also be applied in a simple manner.

Preferably, the cleaning head comprises brushes for engagement with the bottom surface in the lowered position of the cleaning head, which brushes may be driven.

Finally, it is preferred if the squeegee has a suction region defined by a sealing strip and a slit strip intended to engage the bottom surface, the suction region being connected to a vacuum source provided in the floor cleaning machine.

Fig. 1

ein erstes Ausführungsbeispiel einer erfindungsgemäßen Bodenreinigungsmaschine im Querschnitt zeigt,

Fig. 2

die Anordnung aus Reinigungskopf und Saugfuß des Ausführungsbeispiels aus Fig. 1 mit dem Verstellelement in einer ersten Position zeigt,

Fig. 3

die Anordnung des Reinigungskopfs und des Saugfußes der Ausführungsbeispiels aus Fig. 1 mit dem Verstellelement in einer zweiten Position zeigt,

Fig. 4

die Anordnung aus Reinigungskopf und Saugfuß des Ausführungsbeispiels aus Fig. 1 mit dem Verstellelement in einer dritten Position zeigt, wobei der Saugfuß ausgehoben ist,

Fig. 5

die Anordnung aus Reinigungskopf und Saugfuß des Ausführungsbeispiels aus Fig. 1 mit dem Verstellelement in einer dritten Position zeigt,

Fig. 6

eine gegenüber dem in den Fig. 2 bis 5 abgewandelte Anordnung aus Reinigungskopf und Saugfuß für das Ausführungsbeispiel aus Fig. 1 zeigt,

Fig. 7

ein zweites Ausführungsbeispiel einer Anordnung aus Reinigungskopf und Saugfuß für eine erfindungsgemäße Bodenreinigungsmaschine zeigt,

Fig. 8

eine perspektivische Teilansicht des Ausführungsbeispiels aus Fig. 7 zeigt,

Fig. 9

ein Teil des Ausführungsbeispiels aus Fig. 8 in perspektivischer Darstellung zeigt und

Fig. 10

den Saugfuß der Ausführungsbeispiele im Querschnitt zeigt.

In the following, the present invention will be explained with reference to a drawing, which shows only preferred embodiments thereof, wherein

Fig. 1

shows a first embodiment of a floor cleaning machine according to the invention in cross section,

Fig. 2

the arrangement of cleaning head and suction of the embodiment Fig. 1 with the adjusting element in a first position,

Fig. 3

the arrangement of the cleaning head and the squeegee of the embodiment Fig. 1 with the adjusting element in a second position,

Fig. 4

the arrangement of cleaning head and suction of the embodiment Fig. 1 with the adjusting element in a third position, wherein the squeegee is dug,

Fig. 5

the arrangement of cleaning head and suction of the embodiment Fig. 1 with the adjusting element in a third position,

Fig. 6

one opposite the one in the Fig. 2 to 5 modified arrangement of cleaning head and squeegee for the embodiment of Fig. 1 shows,

Fig. 7

shows a second embodiment of an arrangement of cleaning head and suction foot for a floor cleaning machine according to the invention,

Fig. 8

a partial perspective view of the embodiment Fig. 7 shows,

Fig. 9

a part of the embodiment Fig. 8 in perspective and shows

Fig. 10

shows the squeegee of the embodiments in cross section.

In the Fig. 1 to 5 a first embodiment of a floor cleaning machine according to the invention is shown. The floor cleaning machine 1 has a machine frame 3 on which a landing gear comprising three wheels 5 is provided, which makes it possible to move the floor cleaning machine 1 over a floor surface 7 to be cleaned. On the machine frame 3, a seat 9 and a steering wheel 11 are provided, which is coupled to the chassis in a conventional manner, so that the seated on the driver's seat user 9 can direct the floor cleaning machine 1 on the floor surface to be cleaned.

Thus, the embodiment shown here is a ride-on machine. However, the invention is not limited to ride-on machines, but may also be applied to floor cleaning machines that are configured such that a user guides them while walking.

Furthermore, the floor cleaning machine 1 has a cleaning head 13, which is provided with driven brushes 15 and is connected to a mounted in the floor cleaning machine 1 cleaning liquid container. The cleaning head 13 is provided with a pivotally mounted on the machine frame 3 bracket 17 to which the cleaning brushes 15 are mounted. The holder 17 is pivotable about a pivot axis 19. In addition, on the bracket 17, as well as from the FIGS. 2 to 5 recognizable, an adjusting plate 21 attached, which extends from the bracket 17 vertically upwards.

In addition, a squeegee 23 is attached to the machine frame 3, wherein the squeegee 23 has a pivotally mounted about a pivot axis 25 holder 27. On the holder 27 is the actual Saugfußanordnung with a perpendicular to the bottom surface 7 extending sealing strip 28 and a slot extending parallel thereto 28 'provided, the slot bar 28' seen in the direction of travel is arranged in front of the sealing strip 28. Between the sealing strip 28 and the slot strip 28 ', a suction region is formed, which is connected via a suction line 29 with a fan 31 designed as a vacuum source in the floor cleaning machine 1. On the holder 27, a lever arm 33 is fixedly mounted with a free end 35th

As further from the Fig. 1 to 5 can be seen, on the machine frame 3 designed as an electromechanical linear actuator 39 drive is supported, the piston rod 41 is linearly movable in a horizontal and parallel to the bottom surface 7 extending direction. Such linear drives are well known in the art. At the free end of the piston rod 41, an adjusting element 43 is provided, wherein the adjusting element 43 is guided in a straight mounted on the machine frame 3 guide 44. Thus, the adjusting element 43 in this embodiment performs a purely rectilinear motion.

The adjusting element 43 is coupled on the one hand via an elastic element in the form of a tension spring 45 with the free end 35 of the lever arm 33. On the other hand, in the positioning plate 21, a guide track 47 is formed, and the adjusting element 43 engages with a pin provided therein in the guide track 47, wherein due to the course of the guide track 47, a rectilinear movement of the piston rod 41 and thus of the adjusting element 43 to an up and Abbewegung the actuator plate 21 and thus leads to a pivoting movement of the bracket 17. As a result, the cleaning head 13 is raised or lowered by the rectilinear movement of the piston rod 41 or of the adjusting element 43, as will be explained in detail below.

The guideway 47 in the actuator plate 21 in this case has a first portion 47 'facing away from the piston rod 41 drive end 48 of the linear actuator 39, and an inclined to the first portion 47' extending second portion 47 ", the on of the Driving end 48 pioneering end of the first portion 47 'begins.

Characterized in that the piston rod 41 of the linear drive 39 is movable in a straight line and guided in the guide 44, the adjusting element 43 can be moved along a straight path and thereby assume the positions described below.

In the first position, in Fig. 2 1, the piston rod 41 of the linear drive 39 is in the retracted position, and the adjusting element 43 is positioned in the adjusting plate 21 at the end of the first section 47 'of the guide track 47 remote from the second section 47 Swivel axis 19 pivoted upward so that the brush 15 of the cleaning head spaced from the bottom surface 7 and the cleaning head 13 is not engaged with the bottom surface 7. At the same time, the lever arm 33 by the connection between the free end 35 and the adjusting element 43 via the tension spring 45 also pivoted in the direction of the linear drive 39, so that the holder 27 is pivoted upwards and the squeegee 23 is also spaced from the bottom surface.

In this first position of the adjusting element 43 so both the cleaning head 13 and the squeegee 23 are raised from the engaged position or the contact position and the floor cleaning machine 1 can be moved without contact of the cleaning elements on the bottom surface 7. By trained as a tension spring 45 elastic element, however ensures that when the squeegee 23 is loaded from above, for example, by the body weight of the user, this load is taken up by the tension spring 45, which deforms elastically, and no damage to the holder of the squeegee 23 occurs.

When the adjusting element 43 by extending the piston rod 41 in the in Fig. 3 shown second position in the guide track 47 adjacent to the transition between the first and the second section 47 ', 47 "is moved, the position of the holder 17 hardly or only so far that the cleaning head 13 just before the bottom surface 7 to a standing However, the lever arm 33 is pivoted counterclockwise about the pivot axis 25, so that the squeegee 23 is lowered and enters the contact position, in which the sealing strip 28 and the slot bar 28 'in Appendix come with the bottom surface 7. In this second position can be sucked by means of the suction cup 23 located on the bottom surface 7 liquid with the help of the suction line 29 and the fan 31.

In the third, in Fig. 1 and 5 In the position shown, the adjusting element 43 has been moved by extending the piston rod 41 to the end of the second section 47 "of the guide track 47, so that the adjusting plate 21 and thus the holder 17 perform a pivoting movement towards the bottom surface 7. As a result, the cleaning head 13 comes into the engaged position in that the brushes 15 engage with the bottom surface 7 and a cleaning movement occurs during a rotation of the brushes 15. At the same time, the suction foot 23 remains in the contact position, in which the sealing strip 28 and the slot strip 28 'are in contact with the bottom surface 7 ,

In this third position, therefore, the cleaning head 13 and the squeegee 23 are lowered into the engagement or contact position, and the floor cleaning machine 1 is operated in the normal cleaning operation.

In addition, it is still possible in this embodiment, when the adjusting element 43 is in the third position, so actually the cleaning head 13 and the squeegee 23 are lowered to hook the squeegee 23 by means of a holder 49 to a fixed to the machine frame 3 component 51, so the squeegee 23 is in the raised position away from the bottom surface 7. When this is realized, the floor cleaning machine 1 can drive with the cleaning head 13 in the engaged position on the bottom surface 7, without the squeegee 23 has contact with it.

The Fig. 6 shows a modification of the embodiment described above, in which the guide rail 47 in the adjusting plate 21 still another, pointing towards the drive end 48 of the linear actuator 39 section having a greater distance in the vertical direction to the holder 17, so that when the adjusting element 43 is moved by complete retraction of the piston rod 41 of the linear drive 39 in this section, on the one hand, the cleaning head 13 is lowered into the engaged position with the bottom surface 7 and on the other hand the lever arm 33 is pivoted so that the holder 27 is pivoted upwards and the squeegee 23 is not in the contact position with the bottom surface 7, but rather is raised. The resulting in this construction additional travel is absorbed by the tension spring 45 by elongation.

Thus, in this modification, a fourth position for the adjusting element 43 is realized, in which the cleaning head 13 is lowered into the engaged position and the squeegee 23 is lifted from the contact position. It is not necessary here to bring the squeegee 23 manually by means of a bracket by hanging in the raised position, as in the previously described embodiment with respect to Fig. 4 had been explained.

In the embodiment described above, provided on the holder 17 of the cleaning head 13 actuator plate 21 has a guide rail 47 with inclined to each other extending portions 47 ', 47 ", and by this course, the movement of the holder 17 is achieved, while the adjusting element 43 relative to the It is also conceivable, however, to provide the guide 44 with a path having different inclined sections and to pivotally support the drive end 48 of the linear drive 39. Then, with a rectilinear guide track in the adjusting plate 21, a pivoting movement of the guide can also be achieved Bracket 17 can be achieved when the piston rod 41 and the adjusting element 43 are moved, in which case, however, the linear drive is then pivoted relative to the machine frame 3.

In the in the Fig. 7 . 8 and 9 illustrated alternative embodiment, the cleaning head 13 is also connected to a retractable bracket 17, so that by pivoting the bracket 17, the cleaning head 13 can be lowered into the engaged position or raised therefrom. Likewise, as in the previously described embodiments, the squeegee 23 is mounted vertically adjustable via a holder 27 pivotally mounted on the machine frame 3 about a pivot axis 25, the holder 27 having a lever arm 33 with a free end 35. In this embodiment, in turn, a linear drive 39 is provided on the piston rod 41 at the free end thereof, the adjusting element 43 is mounted. Thus, the adjusting element 43 also performs a straight-line movement here.

On the adjusting element 43, a cable element 53 is attached, which runs over a guide roller 55 to the bracket 17. In addition, on the machine frame 3 or on a fixedly connected element about a pivot axis 57 pivotally a coupling member 59 is supported, which has two arms 61, 63 extending away from the pivot axis 57.

On the first, extending from the pivot axis 57 downwardly extending arm 61 is fixed with one end a spring-loaded connecting member 65, the other end is in turn attached to the free end 35 of the lever arm 33, so that a connection with an elastic member is formed. In the second, substantially horizontally extending arm 63 of the coupling element 59, a guide track 67 is again formed, which has a rectilinear upper edge 69 and a lower edge 71, wherein the distance of the lower edge 71 from the upper edge 69 varies and a maximum in a central portion is as the distance to the ends of the guideway 67 decreases. The adjusting element 43 is moved along the guideway 67 during the rectilinear movement of the piston rod 41, the lower edge 71 of the guideway 67 always abutting the adjusting element 43 due to the torque exerted by the suction foot 23 attached to the holder 27. Thus, when the adjusting element 43 is moved in a straight line along the guide track 67, the pivoting position of the coupling element 59 and thus also the pivoting position of the lever arm 33 changes.

When the adjusting element 43 in the in Fig. 7 is shown, wherein the piston rod 41 is fully extended, the coupling element 59 is in a pivot position in which the first arm 61 is pivoted toward the linear drive 39, so that the lever arm 33 is pivoted in this direction and the holder 27 with the squeegee 23 from the contact position is raised out. In addition, the cleaning head 13 is also raised because the cable element 53 is retracted around the guide roller 55.

When the adjusting element 43 is now moved by retraction of the piston rod 41 along the guide track 67 into the section where the lower edge 71 has a greater distance from the upper edge 69, the coupling element 59 is pivoted about the pivot axis 57 in the clockwise direction, so that the suction foot 23 is lowered becomes. At the same time, the cleaning head 13 is lowered by the cable element 53. The further the piston rod 41 is retracted, the further the cleaning head 13 is lowered. Finally, when the adjusting element 43 has moved completely past the end of the guideway 67 facing the linear drive 39 or the pivot axis 57, the coupling element 59 is pivoted back to the linear drive 39 and the suction foot 23 is lifted, while the cleaning head 13 remains in the lowered engagement position ,

• die erste Position I, bei der die Kolbenstange 41 vollständig ausgefahren ist und sich das Verstellelement 43 am von der Schwenkachse 57 entfernten Ende der Führungsbahn 67 befindet, sodass der Saugfuß 23 aus der Kontaktstellung angehoben und der Reinigungskopf 13 ebenfalls aus der Eingriffsstellung angehoben ist,
• die zweite Position II, bei der das Verstellelement 43 hin zu der Schwenkachse 57 verfahren ist, sodass der Saugfuß 23 abgesenkt wird in die Kontaktstellung, während der Reinigungskopf 13 aus der Eingriffsstellung angehoben ist,
• die dritte Position III, in der sowohl der Saugfuß 23 als auch der Reinigungskopf 13 in die Kontaktstellung bzw. die Eingriffsstellung abgesenkt sind, und
• die vierte Position IV, in der das Verstellelement 43 bis zu dem zu der Schwenkachse 57 weisenden Ende der Führungsbahn 67 verfahren ist, sodass der Saugfuß 23 aus der Kontaktstellung angehoben ist, der Reinigungskopf 13 aber in Eingriffsstellung abgesenkt ist.

Thus, the following four positions I, II, III, IV are realized one after another in this embodiment by straight-line method of the adjusting element 43:

• the first position I, in which the piston rod 41 is fully extended and the adjusting element 43 is located at the end of the guide track 67 away from the pivot axis 57, so that the suction foot 23 is lifted out of the contact position and the cleaning head 13 is likewise lifted out of the engaged position,
• the second position II, in which the adjusting element 43 is moved towards the pivot axis 57, so that the squeegee 23 is lowered into the contact position, while the cleaning head 13 is raised from the engaged position,
• the third position III, in which both the squeegee 23 and the cleaning head 13 are lowered into the contact position and the engagement position, and
• the fourth position IV, in which the adjusting element 43 is moved to the pointing to the pivot axis 57 end of the guide track 67, so that the squeegee 23 is raised from the contact position, the cleaning head 13 but lowered in the engaged position.

In the embodiments described above, it is realized in each case that only one drive in the form of the linear drive 39 must be used to move the squeegee 23 and the cleaning head 13, while the required for the operation of the floor cleaning machine 1 combinations of settings of the cleaning head 13 and of the suction cup 23 can be realized. It should be noted that in the embodiments described above, the adjustment 43 performs a linear, linear movement and both the cleaning head 13 and the squeegee 23 are pivotally hinged to the machine frame 3. But it is also conceivable that the adjusting element performs a circular movement to be moved back and forth between the individual positions. Moreover, it is also possible that the cleaning head and the squeegee are mounted geradling displaceable on the machine frame.

Claims (14)

1. Floor cleaning machine with a machine frame (3),

   with a running gear attached to the machine frame (3) to move the floor cleaning machine (1) over a floor surface (7) to be cleaned,

   with a cleaning head (13), being height-adjustable and secured to the machine frame (3) such that, in an engagement position in which the cleaning head (13) engages with the floor surface (7), it can be lowered and raised again,

   with a suction cup (23) designed to suck liquid from the floor surface (7) and being height-adjustable and secured to the machine frame such that, in a contact position in which the suction cup (23) is in close contact with the floor surface (7), it can be lowered and raised again,

   with a displaceable adjusting element (43), which is coupled to the cleaning head (13) and to the suction cup (23), and

   with a drive (39) to move the adjusting element (43) between a first, a second and a third position,

   wherein, in the first position of the adjusting element (43), the cleaning head (13) is raised from the engagement position and the suction cup (23) is raised from the contact position,
   wherein, in the second position of the adjusting element (43), the cleaning head (13) is raised from the engagement position and the suction cup (23) is lowered to the contact position and
   wherein, in the third position of the adjusting element (43), the cleaning head (13) is lowered to the engagement position and the suction cup (23) is lowered to the contact position.
2. Floor cleaning machine according to claim 1, wherein the adjusting element (43) can be moved to a fourth position and

   wherein, in the fourth position of the adjusting element (43), the cleaning head (13) is lowered to the engagement position and the suction cup (23) is raised from the contact position.
3. Floor cleaning machine to claim 1 or 2, wherein the suction cup (13) and the adjusting element (43) are coupled together such that a flexible element (45, 65) is arranged between the suction cup (23) and the adjusting element (43).
4. Floor cleaning machine to at least one of claims 1 to 3, wherein the adjusting element (43) is movable in a straight line.
5. Floor cleaning machine to claim 4, wherein the suction cup (23) has a retainer (27) pivotably attached to the machine frame (3) so that, by swivelling the retainer (27), the suction cup (23) can be raised from the contact position and lowered into it,

   wherein the retainer (27) has a lever arm (33) whose free end (35) is connected to the adjusting element (43).
6. Floor cleaning machine to claim 5, wherein a spring element (45) is arranged between the free end (35) of the lever arm (33) and the adjusting element (43).
7. Floor cleaning machine to claim 4, wherein the suction cup (23) has a retainer (27) pivotably attached to the machine frame (3) so that, by swivelling the retainer (27), the suction cup (23) can be raised from the contact position and lowered into it,

   wherein the retainer (27) has a lever arm (33),

   wherein a pivotably attached coupling element (59) is provided

   which is connected to the free end (35) of the lever arm (33),

   wherein the coupling element (59) has a first guide track (67) with which the adjusting element (43) engages and can travel in it so that a swivel position of the coupling element (59) is changed as the adjusting element (43) travels along the first guide track (67).
8. Floor cleaning machine according to claim 7, wherein a flexible connecting element (65) is provided between the free end (35) of the lever arm (33) and the coupling element (59).
9. Floor cleaning machine according to at least one of claims 4 to 8, wherein the cleaning head (13) has a positioning plate (21) in which a second guide track (47) is formed, with which the adjusting element (43) engages and in which it can travel so that a position of the positioning plate (21) relative to the machine frame (3) is changed as the adjusting element (43) travels along the second guide track (47).
10. Floor cleaning machine according to claim 9, wherein the cleaning head (13) has a bracket (17) pivotably mounted on the machine frame (3) and

    wherein the positioning plate (21) is fastened to the bracket (17) so that, as the adjusting element (43) moves, the bracket (17) is pivoted and can be lowered to and raised again from the engagement position in which the cleaning head (13) engages with the floor surface (7).
11. Floor cleaning machine according to at least one of claims 4 to 8, wherein the cleaning head (13) is connected to the adjusting element (43) by a cable element (53).
12. Floor cleaning machine according to at least one of claims 4 to 11, wherein the adjusting element (43) is provided at the free end of the piston rod (41) of an electromechanical linear drive (39).
13. Floor cleaning machine according to at least one of claims 1 to 12, wherein the cleaning head (13) has brushes (15) to engage with the floor surface (7) in the lowered position.
14. Floor cleaning machine according to at least one of claims 1 to 13, wherein the suction cup (23) has a suction region delimited by a sealing strip (28) and a slotted strip (28'), provided to be in close contact with the floor surface (7), and

    wherein the suction region is connected to a vacuum source which is provided in the floor cleaning machine (1).

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