ROBOT VACUUM

Description

[0001] The invention relates to a vacuum robot for the autonomous cleaning of floor surfaces, wherein the vacuum robot has at least one cleaning roller extending transversely to a processing direction and having an elongated roller body, wherein the cleaning roller can be removed from the vacuum robot and reinserted for changing and / or cleaning, wherein the cleaning roller used in the vacuum robot is rotatably driven on a first bearing side via a drive pin of the cleaning roller, wherein the cleaning roller used in the vacuum robot is mounted on a second bearing side via a loose bearing.

[0002] In private households and in businesses, robot vacuum cleaners are used for the autonomous cleaning of surfaces such as textile floor coverings and smooth floors.

[0003] Robot vacuum cleaners of the type mentioned above are known from the state of the art. The disadvantages of previously known robot vacuum cleaners are that the installation of the cleaning roller is not user-friendly, and the mounting of the cleaning roller lacks sufficient damping, so that operation of the robot vacuum cleaners is accompanied by considerable noise generation due to the rotating, driven cleaning rollers.

[0004] DE 10 2017 208 959 A1 discloses a vacuum robot with a removable cleaning roller, wherein the cleaning roller has a loose bearing on one side and is simultaneously driven via a drive pin.

[0005] GB 2 524 285 A discloses a suction nozzle for a vacuum cleaner with a removable cleaning roller. The cleaning roller has a bearing on one side and is driven via the opposite, second side. The cleaning roller is fixed to the non-driven bearing side via a spring-loaded pin on the suction nozzle.

[0006] The invention therefore addresses the problem of providing an improved robot vacuum cleaner. In particular, the replacement and / or cleaning of the cleaning roller should be simplified, and the acoustics of the robot vacuum cleaner during operation should be improved in a simple manner, thus reducing the noise generated by the rotating cleaning roller. According to the invention, this problem is solved by a robot vacuum cleaner having the features of claim 1.

[0007] Because the floating bearing of the cleaning roller has a spring-loaded bearing bush, wherein the bearing bush of the inserted cleaning roller is received in a bearing receptacle of the vacuum robot, wherein a spring axially displaces the bearing bush by means of spring force on the roller body of the cleaning roller against the bearing receptacle, wherein the spring force of the spring axially displaces the drive pin of the inserted cleaning roller against a drive pin receptacle of the vacuum robot, the installation of the cleaning roller in the vacuum robot can be simplified and, in addition, sufficient damping of the bearing can be achieved in a simple manner, which enables a significant reduction in noise for the operation of the vacuum robot. With the bearing bush of the floating bearing, damping of the bearing can be achieved even without changing the drive pin and the drive pin receptacle.The spring-loaded bearing bushing on the floating bearing still provides damping for the bearing on both sides, as the spring force provides damping support for the bearing bushing in the bearing mount. While supporting the bearing bushing in the bearing mount, the spring force also simultaneously provides damping support for the drive pin in the drive pin mount of the robot vacuum cleaner. Thus, the cleaning roller, including the bearing bushing and the drive pin, is clamped between the bearing mount and the drive pin by the spring force, preferably by a single spring.

[0008] The floor surface can be formed by a textile floor covering such as a carpet or rug or by a hard floor such as wooden parquet, laminate or PVC flooring.

[0009] The robot vacuum cleaner has a fan to generate a vacuum, which the robot vacuum cleaner uses to collect dust and dirt from the floor surface. To ensure that the robot vacuum cleaner cleans and maintains the floor covering as effectively as possible, the robot vacuum cleaner's suction mouth is elongated and runs essentially perpendicular to the working direction. In this context, "elongated" means that the preferably essentially rectangular suction mouth is longer transversely to the working direction than it is wide in the working direction. It can have a dust collection chamber in which the collected dust can be collected, for example, in a dust bag or dust container.

[0010] The bearing bushing on the floating bearing side is preferably elastically mounted via a compression spring, which presses axially against the roller body. This promotes low vibration of the cleaning roller during operation due to the firm, preloaded, and dampened fit of the cleaning roller in the robot vacuum. The bearing bushing can be made of an elastomer, for example, EPDM, NBR, TPU, or silicone, but also of a plastic with good damping properties, for example, POM or polyketone. In a particularly preferred embodiment, the bearing bushing consists of a combination of a hard component and a soft component.

[0011] Advantageous embodiments and further developments of the invention emerge from the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically expedient manner, thus revealing further embodiments of the invention.

[0012] According to an advantageous embodiment of the invention, the drive pin has a plurality of claws, said claws forming first axial sliding surfaces and first tangential engagement surfaces, the drive pin receptacle forming second axial sliding surfaces and second tangential engagement surfaces, the axial sliding surfaces being designed to slide past one another when the cleaning roller is inserted into the vacuum robot and to position the tangential engagement surfaces against one another, the positioned engagement surfaces being configured to transmit a drive force for rotating the cleaning roller from the drive pin receptacle to the drive pin on the inserted cleaning roller. The drive pin and the drive pin receptacle, which is mechanically connected to a drive motor, preferably form claws with the sliding surfaces and the engagement surfaces that correspond to one another.The claws are preferably formed by circular sector sections (cake slices) diagonally halved in the axial direction. When the cleaning roller is inserted, the sliding surfaces align with each other regardless of the angular position of the roller body and slide against each other into a contact position in which the engagement surfaces make mutual contact. Preferably, the edges of the self-locating claws between the sliding surfaces and the engagement surfaces are rounded to prevent the drive pin and the drive pin receptacle from becoming caught when the cleaning roller is inserted. The sliding surfaces of the drive pin and the drive pin receptacle align with each other when the cleaning roller is inserted into the robot vacuum cleaner by rotating the drive pin receptacle around the drive axis.When the cleaning roller is inserted, the sliding surfaces then slide against each other until the tangential contact surfaces of the drive pin and the drive pin holder touch and create a force-locking connection.

[0013] An advantageous embodiment of the invention is that the bearing bushing has a centering pin which is designed to be guided into a pin guide in the bearing receptacle when the cleaning roller is inserted to a pin receiving hole in the bearing receptacle, into which pin the centering pin engages. The centering pin makes it easy to precisely align the cleaning roller when inserting it into the vacuum robot, since the centering pin is guided in the pin guide. The engagement of the centering pin by means of the spring force of the spring enables optimal alignment of the bearing bushing in the bearing receptacle of the vacuum robot during cleaning operation. The engagement of the centering pin also provides haptic feedback that the cleaning roller has been inserted correctly. The locking effect of the bearing bushing mainly occurs via its conical contact surfaces.The pin guide is preferably formed by a funnel-shaped groove in the housing of the robot vacuum. The positioning of the centering pin in the pin receiving hole prevents vertical movement of the bearing bush relative to the drive pin receptacle. The centering pin thereby locks the bearing bush in an operating position in the robot vacuum.

[0014] A preferred embodiment of the invention provides that the bearing bushing has at least one conical contact surface for support in the bearing receptacle. The conical contact surface serves to guide hair or threads as far out as possible when cleaning the floor surface. For this purpose, the conical contact surface is preferably tapered towards the bearing receptacle for support.

[0015] A particularly advantageous development of the invention is that the bearing bush has a collar which adjoins the largest radius of the contact surface and protrudes at least radially from the contact surface. The collar serves to ensure a positive connection between the bearing bush and the roller body. The collar advantageously prevents the bearing bush from becoming loose, for example during maintenance of the cleaning roller: The collar forms an increased diameter, thus preventing hair from migrating into the area between the bearing bush and the roller body. In a further embodiment, the bearing bush has a second collar which extends inwards on the bearing bush in the direction of the axis. In addition, it is preferable to arrange a collar on the bearing shaft which extends radially outwards and serves to ensure a positive connection between the bearing bush and the bearing shaft.

[0016] A further advantageous embodiment of the invention is that the bearing bush is rotatably mounted on a bearing shaft via a ball or plain bearing, wherein the bearing shaft is guided by the spring so as to be axially displaceable relative to the roller body. The ball or plain bearing, which is protected in the bearing bush, enables rotation of the bearing bush relative to the roller body so that the bearing bush can remain firmly positioned in the bearing holder for rotation of the cleaning roller. The bearing shaft, which is guided axially in the roller body, allows the spring travel of the spring-loaded bearing bush. The bearing shaft can be a metal component, preferably steel, so that stable bearing is enabled. The ball bearing can be mounted on the bearing shaft with play and can be removed from the bearing shaft for cleaning, preferably against a slight resistance of the positive connection between the bearing shaft and the bearing bush.

[0017] An advantageous embodiment of the invention provides that the cylindrical roller body has a base diameter, wherein the roller body has projections adjoining the cutting circle, which protrude at least radially from the outer surface of the roller body. These projections are intended to prevent hair and threads that wrap around the cleaning roller when cleaning the floor surface from migrating beyond the cutting circles of the cylindrical roller body and into the bearing sides. The projections projecting radially beyond the outer surface of the roller body have a larger diameter than the base diameter of the roller body, which makes it more difficult for hair and threads to migrate beyond this increased diameter. This effectively protects the bearing sides from becoming clogged with tufts of hair and thread.

[0018] According to an advantageous embodiment of the invention, the cleaning roller has a plurality of rubber lamellas that project radially from the roller body and form lamella outer edges, wherein the elongated rubber lamellas have projections adjoining the axial lamella ends, which project at least radially relative to the lamella outer edges. These projections can be used to prevent hair and threads that wrap around the cleaning roller when cleaning the floor surface from migrating beyond the lamella ends into the bearing sides. The projections projecting radially relative to the lamella outer edges prevent the hair and threads from migrating beyond the lamella ends due to the greater radial distance from the roller body. This effectively protects the bearing sides from becoming clogged with tufts of hair and thread.

[0019] A preferred embodiment of the invention provides that the projections engage in the runners of the vacuum robot, with the runners forming undercuts. The undercuts prevent hair and threads that wrap around the cleaning roller during floor cleaning from migrating beyond the projections into the bearing sides. To this end, the runners preferably enclose the projections at an angle of at least 180°. The rotationally symmetrical runners nevertheless provide sufficient clearance so that the projections can rotate freely in the runners as the cleaning roller rotates.

[0020] Further features, details, and advantages of the invention will become apparent from the following description and the drawings. Embodiments of the invention are illustrated purely schematically in the following drawings and are described in more detail below. Corresponding objects or elements are provided with the same reference numerals in all figures. They show: Figure 1 Vacuum robot with two cleaning rollers, Figure 3 Cleaning roller, Figure 4 Sectional view through bearing bush, Figure 5 First version of the bearing bush, Figure 6 Second version of the bearing bush, Figure 7 Third version of the bearing bush, Figure 8 Pin guide, Figure 9 Engaged centering pin, Figure 10 Open floating bearing, Figure 11 Closed floating bearing, Figure 12 Sectional view through cleaning roller, Figure 13 Sectional view through floating bearing, Figure 14 Further version of floating bearing, Figure 15 Further version of bearing bush, Figure 16 Sectional view through floating bearing, Figure 17 Dimensions of projections, Figure 18 Dimensions of bearing bush, Figure 19 Drive pin, Figure 20 Drive pin holder, Figure 21 Sectional view through first bearing side, Figure 22 Sectional view through projection, and Figure 23 Further sectional view through projection.

[0021] The Figure 1shows a vacuum robot 1 from the underside 47. In this illustration, it can be seen that the vacuum robot 1 has two cleaning rollers 4 extending transversely to the processing direction 3. These cleaning rollers 4 have an elongated roller body 5. For replacement and / or cleaning, the cleaning rollers 4 can be removed from the vacuum robot 1 and reinserted. The cleaning roller 4 inserted into the vacuum robot 1 is mounted on a first bearing side 6 ( Fig. 20 ) via a drive pin 7 ( Fig. 20 ) of the cleaning roller 4 is rotatably driven on the vacuum robot 1. First, however, the axially opposite second bearing side 8 will be described in more detail, on which the cleaning roller 4 is mounted via a loose bearing 9 on the vacuum robot 1.

[0022] In Figure 2 is a cleaning roller 4 according to Figure 2 partially shown in a single view. Here, the spring-loaded bearing bush 10 of the floating bearing 9 ( Fig. 2) can be seen. The bearing bush 10 is in the cleaning roller 4 used, as shown in Figure 2 can be seen, in a bearing holder 11 of the vacuum robot 1.

[0023] The Figure 3 shows a sectional view through the bearing bush 10 according to Figure 2 . In this view, it can be seen that the bearing bush 10 can be displaced on the roller body 5 by means of a spring 12. The spring 12 presses the bearing bush 10 against the bearing holder 11 when the cleaning roller 4 is inserted ( Fig. 1 ) of the loose bearing 9 ( Fig. 1 ). In this state, the spring force F of the spring 12 also presses the drive pin 7 ( Fig. 20 ) of the cleaning roller 4 inserted axially against a drive pin holder 13 ( Fig. 20) of the vacuum robot 1. This makes it much easier to install the cleaning roller 4 in the vacuum robot and also makes it easy to ensure sufficient damping of the bearing, which significantly reduces noise during operation of the vacuum robot. The sectional view also shows that the bearing bush 10 is rotatably mounted on a bearing shaft 25 via a ball or plain bearing 24. The ball or plain bearing 24 is protected in the bearing bush 10 so that hair and threads that wrap around the cleaning roller 4 cannot reach the ball or plain bearing 24. The bearing shaft 25 can be axially displaced by means of the spring 12 and is guided for this purpose in the roller body 5. The bearing shaft 25 advantageously has a disk-shaped shoulder, which counteracts the migration of threads and hair.The ball or plain bearing 24 accommodated in the bearing bush 10 allows the rotation of the bearing bush 10 relative to the roller body 5, so that the bearing bush 10 is firmly held in the bearing receptacle 11 (. Fig. 1 ) can remain positioned. The bearing bush 10 is supported in the bearing support 11 ( Fig. 1 ) via conical contact surfaces 22. These conical contact surfaces 22 serve to guide hair or threads as far out as possible when cleaning the floor surface on the contact surface 22. For this purpose, the conical contact surface 22 runs for support to the bearing support 11 ( Fig. 1) tapers towards the outside. In order to protect the gap between the roller body 5 and the bearing bush 10, the bearing bush 10 is inserted into an axial bore 56 and the axial roller body 5 is continued over the bearing bush 10. A collar 23 which projects radially from the contact surface 22 is also connected to the largest radius of the contact surface 22. The collar 23 thus forms an increased diameter so that hair can be prevented from migrating into the area between the bearing bush 10 and the roller body 5. The ball or plain bearing 24 can be removed from the bearing shaft 25 together with the bearing bush 10. For this purpose, the bearing bush 10 has a shoulder 49 on the contact surfaces 22, which can be gripped behind with a fingernail to pull the bearing bush 10 together with the ball or plain bearing 24 off the bearing shaft 25.The axial freedom of movement of the bearing shaft 25 in the roller body 5 is limited by an elongated hole 50 in the bearing shaft 25 and a stop element 51 inserted therein, which is attached to the roller body 5. The stop element 51 can be a metric screw, a self-tapping screw, or a simple bolt with a locking geometry for a roller bore.

[0024] The Figure 4 shows a first embodiment of the contact surfaces 22 of the bearing bush 10. In this case, the contact surfaces 22 are smooth and rotationally symmetrical.

[0025] Out of Figure 5 a second design of the contact surfaces 22 of the bearing bush 10 is visible. Here, elevations 52 in the form of knobs are provided on the contact surfaces 22 to ensure a positive connection with the correspondingly designed bearing support 11 ( Fig. 1) can be produced. The elevations 52 prevent the bearing bush 10 from slipping when hair gets between the bearing bush 10 and the bearing seat 11 ( Fig. 2 ) slips and damages the bearing holder 11.

[0026] The Figure 6 discloses a third embodiment of the contact surfaces 22 of the bearing bush 10. In this embodiment, the elevations 52 are designed as webs which fit into correspondingly designed grooves of the bearing support 11 ( Fig. 1 ) and create a positive connection. The elevations 52 ensure that the bearing bush 10 is held in place by hairs between the bearing bush 10 and the bearing support 11 ( Fig. 1 ) does not slip and damage the bearing support 11. Furthermore, the position of the bearing bush defined by the elevation has a beneficial effect on the vibration behavior of the cleaning roller.

[0027] In Figure 7The bearing mount 11 of the floating bearing 9 is shown. A cleaning roller 4 is also shown partially before being inserted into the vacuum robot 1. A centering pin 19 on the bearing bush 10 can also be seen here. The block arrows indicate that the centering pin 19 is designed to be guided in a pin guide 20 of the bearing mount 11 to a pin receiving hole 21 of the bearing mount 11 when the cleaning roller 4 is inserted.

[0028] The Figure 8shows the centering pin 19 engaged in the pin receiving hole 21. The centering pin 19 allows for precise alignment of the cleaning roller 4 when inserted into the robot vacuum cleaner 1, as the centering pin 19 is guided by the pin guide. The engagement of the centering pin 19 is achieved via the spring force of the spring 12 and enables optimal alignment of the bearing bushing 10 in the bearing receptacle 11 of the robot vacuum cleaner 1 during cleaning operation. Furthermore, the engagement of the centering pin 19 provides haptic feedback that the cleaning roller 4 has been inserted correctly.

[0029] In Figure 9 A view of the open floating bearing 9 with the bearing receptacle 11 is shown. The bearing receptacle 11 formed in the housing of the vacuum robot 1 can be radially closed using a separate capsule part 53.

[0030] For this purpose, the capsule part 53 is placed on the floating bearing 9 on the bearing holder 11, as shown in Figure 10The capsule part 53 can be pivotally mounted on the vacuum robot 1 so that it can be used to remove the cleaning roller 4 ( Fig. 2 ) can be swung open. To secure the bearing bushing 10 in the bearing receptacle 11, the capsule part 53 can then simply be swung closed again after inserting the cleaning roller 4. The capsule part 53 can then be locked onto the vacuum robot 1.

[0031] In Figure 11 An embodiment is shown in which rubber lamellae 30 projecting radially from the roller body 5 of the cleaning roller 1 form an undercut 34 with the bearing bush 10. This prevents unintentional loosening of the bearing bush 10 together with the ball or plain bearing 24.

[0032] The Figure 12shows a design of the floating bearing 9 in which the rubber lamellae 30 projecting radially from the roller body 5 have projections 32 at the lamella ends 31. The elongated rubber lamellae 30 each form lamella outer edges 29 along the cleaning roller 1. The projections 32 adjoining the axial lamella ends 31 protrude radially relative to the lamella outer edges 29. These projections 32 on the rubber lamellae 30 prevent hair and threads from wrapping around the cleaning roller 4 when cleaning the floor surface and migrating beyond the lamella ends 31 into the bearing sides 6, 8. In this way, the bearing sides 6, 8 are effectively protected from becoming clogged with tufts of hair and thread. The projections 32 engage in grooves 33, with the grooves 33 forming undercuts 34 for this purpose.The undercuts 34 ensure that hair and threads that wrap around the cleaning roller 4 during cleaning of the floor surface do not migrate beyond the projections 32 into the bearing sides 6, 8. To this end, the guide grooves 33 preferably enclose the projections 32, as shown, at an angle of at least 180°. In the exemplary embodiment, the rotationally symmetrical guide grooves 33 are formed by the housing of the vacuum robot 1 and the capsule part 53, which secures the cleaning roller 4 in the vacuum robot 1. The labyrinth-like structure of the projection 32 and the guide groove 33 effectively prevents threads and hair from penetrating the bearing of the cleaning roller 4.

[0033] In Figure 13 Another design of the floating bearing 9 is shown. In contrast to the design according to Figure 7 , 9 and 10 The bearing support 11 has a star structure 54 on the support for the bearing bush 10 ( Fig. 14 ).

[0034] As in Figure 14 As can be seen, the corresponding bearing bush 10 also has a star structure 54 as elevations on the conical contact surface 22. The Figure 14 The cleaning roller 4 shown in detail can be found in the bearing holder 11 according to Figure 13 a particularly light positive connection via the mutually corresponding star structures 54. This enables a defined seat of the bearing bush 10 in the radial direction in the bearing receptacle 11. This prevents the bearing bush 10 from slipping due to friction in the loose bearing 9. The star structure 54 is preferably formed by rotationally arranged cylindrical pull-off bodies (female) of the conical contact surface 22 of the bearing bush 10 or raised structures (male) on the bearing receptacle 11. The pull-off bodies run in the direction of the axis of rotation of the cleaning roller 4.

[0035] The Figure 15shows a sectional view through the floating bearing 9. In the embodiment shown here, additional projections 27 are provided on the cylindrical roller body 5. Of the basic diameter d_mb1 of the roller body 5, which in Figure 16 As shown, these projections 27 project radially from the outer surface 28 of the roller body 5. Up to the diameter d_mb4, which is equal to or greater than the diameter d_c ( Fig. 16 ) of the undercut 34 of the running channel 33. The projection 27 adjoining the cutting circle 26 protrudes with the diameter d_mb3 ( Fig. 16 ) under the undercut 34 into the groove 33, whereby the diameter d_mb3 ( Fig. 16 ) is smaller than the diameter d_c ( Fig. 16 ) of the undercut 34, but larger than the diameter d_mb2 ( Fig. 16) of the projection 27 in front of the undercut 34. This makes it more difficult for hair and threads to migrate along the path indicated by the arrows during operation of the vacuum robot 1. This is because the potential increase due to the increasing diameter effectively stops the migration of the hair and threads. In the embodiment shown here, the bearing bush 10 is advantageously composed of two components. A firmer component forms the centering pin 19, while a softer component forms the collar 23 adjoining the contact surface 22. In addition, an elastic retaining collar 57 ( Fig. 16 ) is provided to prevent the bearing bush 10 from becoming detached from the bearing shaft 25.

[0036] As in Figure 17As can be seen, the diameter d_b1 of the adjoining collar 23 is larger than the diameters d_b2 and d_b3 of the conical contact surface 22. This also effectively prevents hair or threads from overcoming the adjoining collar 23 and penetrating into the area of ​​the ball or plain bearing 24.

[0037] The Figure 18 shows the drive pin 7 in a perspective view. Here, it can be seen that the drive pin 7 has several claws 14, which form first, axial sliding surfaces 15 and first, tangential engagement surfaces 16. In Figure 19However, it can be seen that the drive pin receptacle 13 forms second, axial sliding surfaces 17 and second, tangential engagement surfaces 18. The axial sliding surfaces 15, 17 of the drive pin receptacle 13 and the drive pin 7 are designed to slide past one another when the cleaning roller 4 is inserted into the vacuum robot 1 until the tangential engagement surfaces 16, 18 of the drive pin receptacle 13 and the drive pin 7 touch. The touching engagement surfaces 16, 18 are designed to transfer a drive force for rotating the cleaning roller 4 from the drive pin receptacle 13 to the drive pin 7 on the inserted cleaning roller 4.

[0038] The drive pin 7 and the drive pin receptacle 13, together with the sliding surfaces 15, 17 and the engagement surfaces 16, 18, form claws 14 that correspond to one another. The claws 14 are formed by circular sector sections (cake slices) that are diagonally halved in the axial direction. Thus, when the cleaning roller 4 is inserted, the sliding surfaces 15, 17 find each other regardless of the angular position of the roller body 5 and slide against each other into a contact position in which the engagement surfaces 16, 18 make mutual contact. The edges of the self-locating claws 14 between the sliding surfaces 15, 17 and the engagement surfaces 16, 18 are rounded, preventing the drive pin 7 and the drive pin receptacle 13 from becoming caught when the cleaning roller 4 is inserted.

[0039] In Figure 20a sectional view through the first bearing side 6 is shown. Here you can see how the drive pin 7 and the drive pin receptacle 13 engage with each other after the cleaning roller 4 has been inserted into the vacuum robot 1. In this design, projections 32 are also provided on this bearing side on the rubber slats 30 projecting radially from the roller body 5 and on the slat ends 31. The projections 32 adjoining the axial slat ends 31 also protrude radially from the slat outer edges 29. This prevents hair and threads from wrapping around the cleaning roller 4 when cleaning the floor surface and migrating over the slat ends 31 into the bearing side. Here too, the projections 32 engage in grooves 33, with the grooves 33 forming undercuts 34 for this purpose.This ensures that hair and threads that wrap around the cleaning roller 4 during cleaning of the floor surface do not migrate beyond the projections 32 into the bearing side 6. The undercuts 34 are preferably formed from an elastic material, which facilitates the insertion of the cleaning roller 4 into the vacuum robot 1.

[0040] The Figure 21 provides another detailed view of the undercut 34 of the trough 33, in which the projection 32 is accommodated. Furthermore, an overlap 58 is provided in the bearing area, which repels penetrating hair.

[0041] This overlap 58 is more clearly visible in the detailed view shown in Figure 23. The labyrinth-like structure of projection 32, groove 33, and overlap 58 particularly effectively prevents threads and hair from penetrating the bearing of the cleaning roller 4.

[0042] Of course, the invention is not limited to the illustrated embodiments. Further embodiments are possible without departing from the basic idea. Reference list:

[0043] 1 Vacuum robot 3 Processing direction 4 Cleaning roller 5 Roller body 6 First bearing side 7 Drive pin 8 Second bearing side 9 Floating bearing 10 Bearing bush 11 Bearing holder 12 Spring 13 Drive pin holder 14 Claw 15 Axial sliding surfaces (drive pin) 16 Tangential contact surfaces (drive pin) 17 Axial sliding surfaces (drive pin holder) 18 Tangential contact surfaces (drive pin holder) 19 Centering pin 20 Pin guide 21 Pin holder hole 22 Contact surface 23 Collar 24 Ball or plain bearing 25 Bearing shaft 26 Cutting circle 27 Overhang (roller body) 28 Shell surface 29 Outer edges of the slats 30 Rubber slats 31 Slat ends 32 Overhang (rubber slats) 33 Running grooves 34 Undercuts 35 Connection piece 36 Suction pipe 37 37a Vacuum cleaner housing 38 Handle 39 Suction hose 40 Connection cable 41 Suction mouth 42 Separation system 43 Dust chamber 44 Exhaust air grille 45 Foot switch 46 Manual switch 47 Underside 48 Support elements 49 Heel 50 Slotted hole 51 Stop element 52 Elevations 53Capsule part 54 Star structure 55 Retaining collar 56 Bore 57 Retaining collar 58 Overlap F Spring force d_mb1 Base diameter d_mb2 Diameter of the projection d_mb3 Diameter under the undercut d_mb4 Diameter of the projection d_b1 Diameter of the adjoining collar d_b2 Diameter of the conical contact surface d_b3 Diameter of the conical contact surface d_c Diameter of the undercut

Claims

1. Robotic vacuum cleaner comprising at least one cleaning roller (4) which extends transversely to a processing direction (3) and has an elongate roller body (5), the cleaning roller (4) being removable from the robotic vacuum cleaner (1) for changing and / or cleaning and being reinsertable, the inserted cleaning roller (4) in the robotic vacuum cleaner (1) being rotatably driven on a first bearing side (6) via a drive pin (7) of the cleaning roller (4), the inserted cleaning roller (4) in the robotic vacuum cleaner (1) being mounted on a second bearing side (8) via a floating bearing (9), characterised in that the floating bearing (9) of the cleaning roller (4) has a spring-loaded bearing bushing (10), the bearing bushing (10) of the inserted cleaning roller (4) being received in a bearing receptacle (11) of the robotic vacuum cleaner (1), with a spring (12) axially displacing the bearing bushing (10), by means of spring force (F) on the roller body (5) of the cleaning roller (4), against the bearing receptacle (11), the spring force (F) of the spring (12) axially displacing the drive pin (7) of the inserted cleaning roller (4) against a drive pin receptacle (13) of the robotic vacuum cleaner (1).

2. Robotic vacuum cleaner (1) according to claim 1, characterised in that the drive pin (7) has a plurality of claws (14), these forming first, axial sliding surfaces (15) and first, tangential engagement surfaces (16), the drive pin receptacle (13) forming second, axial sliding surfaces (17) and second, tangential engagement surfaces (18), the axial sliding surfaces (15, 17) being designed to slide past one another when the cleaning roller (4) is inserted into the robotic vacuum cleaner (1) and to position the tangential engagement surfaces (16, 18) against one another, the positioned engagement surfaces (16, 18) being designed to transmit a driving force to the inserted cleaning roller (4) for rotating the cleaning roller (4) from the drive pin receptacle (13) to the drive pin (7).

3. Robotic vacuum cleaner (1) according to claim 1 or claim 2, characterised in that the bearing bushing (10) has a centering pin (19) which is designed, when the cleaning roller (4) is inserted into a pin guide (20) of the bearing receptacle (11), to be guided to a pin receiving hole (21) of the bearing receptacle (11), in which the centering pin (19) engages.

4. Robotic vacuum cleaner (1) according to any of the preceding claims, characterised in that the bearing bushing (10) has at least one conical contact surface (22) for support in the bearing receptacle (11).

5. Robotic vacuum cleaner (1) according to claim 4, characterised in that the contact surface (22) forms at least one elevation (52) which engages, in an operating position of the bearing bushing (10), in a recess of the bearing receptacle.

6. Robotic vacuum cleaner (1) according to claim 4, characterised in that the bearing bushing (10) has a collar (23) which adjoins the largest radius of the contact surface (22) and protrudes at least radially from the contact surface (22).

7. Robotic vacuum cleaner (1) according to any of the preceding claims, characterised in that the bearing bushing (10) is rotatably mounted on a bearing shaft (25) via a ball bearing or a plain bearing (24), the bearing shaft (25) being guided by means of the spring (12) so as to be axially displaceable relative to the roller body (5).

8. Robotic vacuum cleaner (1) according to any of the preceding claims, characterised in that the cylindrical roller body (5) has a base diameter (d_mb1), the roller body (5) having projections (27) which adjoin the intersection circle (26) and protrude at least radially from the lateral surface (28) of the roller body (5).

9. Robotic vacuum cleaner (1) according to any of the preceding claims, characterised in that the cleaning roller (4) has a plurality of rubber lamellae (30) which protrude radially from the roller body (5) and form lamella outer edges (29), the elongate rubber lamellae (30) having projections (32) which adjoin the axial lamellae ends (31) and protrude at least radially relative to the lamella outer edges (29).

10. Robotic vacuum cleaner (1) according to claim 8 or claim 9, that the projections (27, 32) engage in running channels (33) of the robotic vacuum cleaner (1), wherein the running channels (33) form undercuts (34).