Rotary brush for suction head

Abstract

The invention provides a rotary brush (11) comprising: a brush body (12) having a substantially tubular shape around a central axis (A); a centering device (22) provided in the brush body (12) and configured to cooperate with a complementary centering device (23) belonging to a drive device (16) to center the brush body (12) with respect to a drive shaft (18) coupled to a drive motor (17) belonging to the drive device (16); and a coupling device (24) provided in the brush body (12) and configured to be rotatably coupled with a complementary coupling device (25) belonging to the drive device (16) and rotatably coupled to the drive shaft (18).

Description

Technical Field

[0001] This invention relates to the field of vacuum cleaners equipped with suction heads for sucking up dust and small particulate waste present on surfaces to be cleaned. Background Technology

[0002] Vacuum cleaners equipped with nozzles are well-known in the market; they allow surfaces to be cleaned by suction to remove dust and small particulate waste that has settled on them. Surfaces to be vacuumed can be, for example, tile, parquet flooring, laminate, carpet, or rugs.

[0003] The suction head comprises a body in a known manner, the body including a base plate having a bottom surface and a suction port opening on the bottom surface of the base plate. During use of the suction head, the bottom surface of the base plate is positioned near the surface to be suctioned.

[0004] To improve the cleaning performance of the suction head, it is known that the suction head is equipped with:

[0005] - A rotary brush, comprising a brush body rotatable about a rotation axis and detachably mounted in a receiving recess defined by the body of the suction head, and

[0006] - A drive unit configured to drive the brush body to rotate about a rotation axis, the drive unit including a drive motor with an output shaft.

[0007] The drive unit also includes a drive shaft substantially coaxial with the central axis of the brush body. The drive shaft may be formed from, or may be coupled to, the output shaft of a drive motor. The drive unit also includes a connecting member rotatably coupled to the drive shaft and configured to rotatably connect with a connecting device disposed on the brush body to transmit rotational torque from the output shaft of the drive motor to the brush body.

[0008] When the rotating brush is placed in its receiving recess, misalignment of the drive shaft relative to the coupling device on the brush body may make it difficult to place the rotating brush in its receiving recess, resulting in the rotating brush not locking properly in its receiving recess, or damage to the coupling device or drive device.

[0009] Furthermore, in a configuration where the drive motor is located inside the rotating brush, during the operation of the suction head while the brush is rotating, if there is misalignment between the central axis of the brush body and the output shaft of the drive motor, the brush body can easily come into contact with the outer cylindrical surface of the motor chamber, which is mounted on the main body and is typically at least partially housed within the brush body. The risk of the brush body rubbing against the motor chamber is particularly high when the radial clearance between the brush body and the motor chamber is reduced.

[0010] This friction between the brush body and the motor chamber leads to increased energy consumption and may even hinder the rotating brush from rotating around the motor chamber. Summary of the Invention

[0011] The present invention aims to overcome all or some of these disadvantages.

[0012] In particular, the fundamental technical problem of the present invention is to provide a rotating brush for a suction head that increases the service life, thereby also increasing the service life of the suction head.

[0013] Therefore, the present invention relates to a rotating brush for a suction head, comprising:

[0014] - A brush body having a generally tubular shape around a central axis, the brush body being designed to be mounted in a receiving recess provided on the suction head, the brush body being configured to be driven to rotate about a rotation axis by a drive mechanism belonging to the suction head, the rotation axis of the brush body being substantially coaxial with the central axis of the brush body.

[0015] - A centering device, disposed within the brush body and configured to cooperate with a complementary centering device belonging to the drive unit, to center the brush body relative to a drive shaft connected to a drive motor belonging to the drive unit, and

[0016] - A connecting device, which is disposed in the brush body and is configured to be rotatably connected to a complementary connecting device, which is part of the drive device and rotatably connected to the drive shaft.

[0017] This design of the rotary brush, particularly the presence of the centering device, allows for automatic centering of the brush body's central axis relative to the drive shaft connected to the drive motor from its eccentric position, especially when the brush body is inserted into the receiving recess on the suction head. This arrangement facilitates placement of the rotary brush in its receiving recess, prevents misalignment between the brush body and the drive shaft, and increases the service life of the connecting devices within the brush body and the complementary connecting devices belonging to the drive mechanism.

[0018] The term "complementary centering device" refers to a centering device having at least one shape that is complementary to the shape of a centering device disposed on a rotating brush.

[0019] The term "complementary coupling device" refers to a coupling device having at least one shape that is complementary to the shape of a coupling device disposed on a rotating brush.

[0020] Rotary brushes may also have one or more of the following features, individually or in combination.

[0021] According to an embodiment of the invention, the centering device is configured to automatically center the central axis of the brush body relative to the drive shaft from the eccentric position of the brush body, particularly when the brush body is inserted into the receiving recess provided on the suction head.

[0022] According to an embodiment of the present invention, the coupling device is offset from the centering device in a direction parallel to the central axis of the brush body.

[0023] According to an embodiment of the present invention, the connecting device includes a connecting portion configured to mate with a complementary connecting portion belonging to a complementary connecting device.

[0024] According to an embodiment of the present invention, the connecting portion extends coaxially with the central axis of the brush body.

[0025] According to an embodiment of the invention, the connecting portion includes at least one driving surface that extends substantially parallel to the central axis of the brush body and is configured to engage with at least one complementary driving surface disposed on the complementary connecting portion and extending substantially parallel to the drive shaft.

[0026] According to an embodiment of the invention, at least one driving surface is substantially flat.

[0027] According to an embodiment of the invention, the connecting portion has at least one guide surface configured to mate with at least one complementary guide surface disposed on the complementary connecting portion, so as to position at least one drive surface facing, for example, against, at least one complementary drive surface when the brush body is inserted into the receiving recess. These arrangements ensure the relative pre-positioning of the connecting portion and the complementary connecting portion before the drive motor is started.

[0028] According to an embodiment of the invention, at least one guide surface extends substantially spirally about the central axis of the brush body, and at least one complementary guide surface extends substantially spirally about the drive shaft.

[0029] According to an embodiment of the invention, at least one guide surface is defined by a drive groove disposed on the connecting portion, and at least one complementary guide surface is defined by a drive rib disposed on the complementary connecting portion.

[0030] According to an embodiment of the invention, the coupling portion includes a plurality of driving surfaces, such as three, which are angularly offset from each other relative to the central axis of the brush body, and each driving surface is configured to mate with a corresponding complementary driving surface disposed on the complementary coupling portion.

[0031] According to an embodiment of the invention, the connecting portion includes a plurality of guide surfaces, such as three or six, which are angularly offset from each other relative to the central axis of the brush body, each guide surface being configured to mate with a corresponding complementary guide surface disposed on the complementary connecting portion. Advantageously, the guide surfaces face the same direction.

[0032] According to an embodiment of the present invention, each driving surface is disposed between the leading and trailing edges of two adjacent guiding surfaces.

[0033] According to an embodiment of the invention, the guide surface is configured to be substantially equidistant from the central axis of the brush body.

[0034] According to an embodiment of the present invention, the connecting portion is a female connecting portion, and the complementary connecting portion is a male connecting portion.

[0035] According to an embodiment of the present invention, the connecting portion is a male connecting portion, and the complementary connecting portion is a female connecting portion.

[0036] According to an embodiment of the present invention, the centering device is arranged around the connecting device.

[0037] According to an embodiment of the invention, the centering device is radially disposed between the inner wall of the connecting device and the brush body. More specifically, the centering device is disposed in an annular region extending around the connecting device.

[0038] According to an embodiment of the present invention, the centering device connects the coupling device to the inner wall of the brush body.

[0039] According to embodiments of the invention, the centering device includes a truncated conical centering wall configured to converge away from the drive shaft. These arrangements provide effective centering of the brush body with a relatively simple-to-manufacture centering device.

[0040] According to an embodiment of the present invention, a truncated conical centering wall extends from the inner wall of the brush body.

[0041] According to an embodiment of the present invention, the truncated conical centering wall is coaxial with the central axis of the brush body.

[0042] According to an embodiment of the invention, the brush body defines a motor recess in which the drive motor is intended to be at least partially housed. Advantageously, the drive motor is entirely housed within the brush body.

[0043] According to an embodiment of the invention, the brush body includes a first end configured to be located near the drive device, and a second end opposite to the first end.

[0044] According to an embodiment of the invention, the first end portion at least partially defines the motor recess, and the drive motor is intended to be at least partially received in the motor recess.

[0045] According to an embodiment of the invention, the brush body is configured to be detachably mounted in a receiving recess provided on the suction head, for example along a laterally extending mounting direction, preferably perpendicular to the movement direction of the suction head.

[0046] According to an embodiment of the invention, the rotating brush includes bristles disposed on the outer surface of the brush body. Advantageously, the rotating brush includes at least one row of bristles disposed on the outer surface of the brush body.

[0047] According to an embodiment of the present invention, the brush body is a cylinder with a circular cross-section.

[0048] The present invention also relates to a suction head, comprising:

[0049] - A main body having a receiving recess with an opening in its bottom surface, the bottom surface being configured to face the surface to be cleaned.

[0050] - As described above, the rotating brush body is installed in the receiving recess, and

[0051] - A drive mechanism configured to drive the brush body to rotate about a rotation axis, the drive mechanism comprising:

[0052] • Drive motor

[0053] • The drive shaft connected to the drive motor

[0054] • A complementary centering device disposed in the brush body, which is configured to cooperate with a centering device disposed on the rotating brush to center the brush body relative to the drive shaft.

[0055] • A complementary coupling device, rotatably connected to the drive shaft and disposed in the brush body, is configured to be rotatably connected to a coupling device disposed on the rotating brush.

[0056] According to an embodiment of the present invention, the complementary coupling device is offset from the complementary centering device in a direction parallel to the central axis of the brush body.

[0057] According to an embodiment of the present invention, the complementary coupling device is different from the complementary centering device and is separate from the complementary centering device.

[0058] According to an embodiment of the invention, the drive unit includes a coupling member that is integral and includes complementary coupling devices and complementary centering devices. These arrangements allow for brush body centering without adding any additional components.

[0059] According to an embodiment of the present invention, the complementary centering device is arranged around the complementary coupling device.

[0060] According to an embodiment of the present invention, the complementary centering device includes at least one centering element that is elastically deformable.

[0061] According to an embodiment of the invention, the drive device and the rotating brush are configured such that when the brush body is inserted into the receiving recess, at least one elastically deformable centering element contacts and elastically deforms a centering device disposed on the rotating brush, thereby centering the brush body relative to the drive shaft.

[0062] According to an embodiment of the invention, at least one elastically deformable centering element is a centering collar, which is elastically deformable and substantially coaxial with the drive shaft.

[0063] According to an embodiment of the present invention, the centering collar protrudes axially from the rear edge of the complementary coupling portion, that is, from the edge of the complementary coupling portion located on the drive motor side.

[0064] According to an embodiment of the invention, at least one elastically deformable centering element comprises a plurality of elastically deformable centering vanes that are angularly offset from each other relative to the drive shaft.

[0065] According to an embodiment of the invention, each centering winglet protrudes axially from the trailing edge of the complementary connecting portion.

[0066] According to an embodiment of the present invention, the centering vane is arranged at substantially equal distances from the drive shaft.

[0067] According to an embodiment of the present invention, the plurality of centering vanes include a first group and a second group. The first group includes a plurality of first centering vanes, and the second group includes a plurality of second centering vanes. Each first centering vane is disposed between two adjacent second centering vanes. The first group of first centering vanes allows the rotating brush to be positioned by applying axial pressure thereon during the insertion of the rotating brush, while the second group of second centering vanes acts as a stop when the first group of centering vanes is compressed.

[0068] According to an embodiment of the present invention, the centering vanes are uniformly distributed around the drive shaft.

[0069] According to an embodiment of the invention, the centering wing extends from the outer periphery of the complementary connecting portion.

[0070] According to an embodiment of the invention, each centering vane is tilted relative to the drive shaft.

[0071] According to an embodiment of the present invention, in the rest position, each centering vane is tilted relative to the drive shaft by an angle greater than half an angle at the apex of the truncated conical centering wall.

[0072] According to an embodiment of the present invention, the complementary connecting portion includes a truncated conical central portion disposed at one end of the complementary connecting portion and configured to engage with a truncated conical central recess disposed on the connecting portion, thereby centering the connecting portion relative to the complementary connecting portion.

[0073] According to an embodiment of the invention, the body has a channel opening in a receiving recess, the brush body is adapted to be introduced into and removed from the receiving recess through the channel opening, and the suction head includes a sealing plug configured to at least partially close the channel opening, the brush body being rotatably mounted relative to the sealing plug.

[0074] According to an embodiment of the present invention, the channel opening is provided on the side of the main body.

[0075] According to an embodiment of the present invention, the drive shaft is the output shaft of the drive motor.

[0076] According to an embodiment of the invention, the drive motor is at least partially housed in the brush body.

[0077] According to an embodiment of the present invention, the drive shaft is connected to the output shaft of the drive motor.

[0078] According to an embodiment of the invention, the output shaft of the drive motor is parallel to the drive shaft, and the drive motor is disposed outside the rotating brush. Advantageously, the output shaft of the drive motor is parallel to the drive shaft and is connected to the drive shaft via a gear chain or possibly a toothed belt.

[0079] According to an embodiment of the invention, the second end of the brush body is supported by a sealing plug and is rotatably mounted relative to the sealing plug.

[0080] According to an embodiment of the present invention, the sealing plug includes a plug body and a locking device configured to lock the plug body onto the body.

[0081] According to an embodiment of the invention, the main body includes a base plate and a suction port. The base plate has a bottom surface configured to face the surface to be cleaned, and the suction port opens in the bottom surface. Advantageously, a receiving recess opens in the bottom surface of the base plate via the suction port.

[0082] According to an embodiment of the invention, the suction nozzle has an elongated shape and extends laterally, for example, perpendicular to the direction of movement of the suction head. Attached Figure Description

[0083] The invention will be well understood with the aid of the following description with reference to the accompanying drawings, which illustrate embodiments of such a suction tip by way of non-limiting example.

[0084] Figure 1 This is a top perspective view of the suction head according to the present invention.

[0085] Figure 2 yes Figure 1 A top-view perspective view of the suction head, showing that the rotating brush of the suction head has been partially removed.

[0086] Figure 3 yes Figure 1 A top-down 3D view of the suction head.

[0087] Figure 4 yes Figure 1 A longitudinal sectional view of the suction head.

[0088] Figure 5 yes Figure 1 A longitudinal sectional view of the suction head shows the rotating brush of the suction head partially removed.

[0089] Figure 6 yes Figure 5 A magnified view of the details.

[0090] Figure 7 It belongs to Figure 1 A three-dimensional view of the connecting components of the suction head.

[0091] Figure 8 yes Figure 7 Side view of the connecting component.

[0092] Figure 9 yes Figure 7 Front view of the connecting component. Detailed Implementation

[0093] Figures 1 to 9 A suction head 2 is shown, which includes a connecting sleeve 3, to which a connector of a rigid or flexible tube is designed to connect. The rigid or flexible tube itself is connected to the suction system of a vacuum cleaner (not shown). Various different models of vacuum cleaners are available on the market that can be used with the suction head 2 according to the invention; since these different models are known to those skilled in the art, they are not described in detail in this patent application.

[0094] The suction head 2 includes a body 4 configured to move on the surface to be cleaned. Advantageously, the connecting sleeve 3 is pivotally mounted relative to the body 4, thereby allowing the body 4 to pivot forward and backward as the suction head 2 moves in the direction of movement D1.

[0095] The main body 4 includes a base plate 5, which has a bottom surface 6 configured to face the surface to be cleaned, and a suction port 7 with an opening in the bottom surface 6. The suction port 7 is in particular connected to the connecting sleeve 3 via a connecting channel 8 formed at least partially, for example, by a flexible connecting tube. The suction port 7 may have an elongated shape and extend laterally, for example, perpendicular to the direction of movement D1 of the suction head 2.

[0096] The main body 4 also includes a receiving recess 9, which opens in the bottom surface of the base plate 5 via a suction port 7 and is fluidly connected to the connecting channel 8. Therefore, according to the embodiment shown in the figure, the receiving recess 9 forms a suction chamber.

[0097] The suction head 2 also includes a rotating brush 11, which comprises a brush body 12 having a generally tubular shape and extending along a central axis A. The brush body 12 is rotatably mounted in a receiving recess 9 about a rotation axis substantially coaxial with the central axis A of the brush body 12. Advantageously, the brush body 12 is detachably mounted in the receiving recess 9 and configured to be introduced into and removed from the receiving recess 9 along an installation direction D2. The installation direction D2 extends transversely to, and preferably perpendicularly to, the movement direction D1 of the suction head 2.

[0098] According to the embodiment shown in the accompanying drawings, the body 4 has a channel opening 13 that opens into the receiving recess 9, through which the brush body 12 can be introduced into and removed from the receiving recess 9. Advantageously, the channel opening 13 is located on the side of the body 4.

[0099] According to the embodiment shown in the accompanying drawings, the rotary brush 11 has bristles 14 disposed on the outer surface of the brush body 12. Advantageously, the brush body 12 is generally cylindrical with a circular cross-section, and the rotary brush 11 includes multiple rows of bristles, for example, spirally extending around the central axis A of the brush body 12. According to an alternative embodiment not shown in the figures, the bristle rows can be replaced with elastically deformable sheets or foam cleaning sleeves.

[0100] The suction head 2 also includes a sealing plug 15 configured to at least partially close the channel opening 13 when the brush body 12 is mounted in the receiving recess 9.

[0101] The suction head 2 also includes a drive unit 16 configured to drive the brush body 12 to rotate about a rotation axis. More specifically, the drive unit 16 includes a drive motor 17, preferably an electric motor, which includes an output shaft 18. Figures 4 to 6 In an exemplary embodiment, the output shaft 18 forms a drive shaft substantially aligned with the rotation axis of the brush body 12. The drive motor 17 is housed in a motor chamber 19 defined by the body 4, and the motor chamber 19 and the drive motor 17 are disposed in a motor recess 21 defined by the brush body 12.

[0102] In an alternative embodiment of the invention, the drive motor 17 is disposed in the suction head outside the rotating brush. According to this alternative, the output shaft of the drive motor 17 extends parallel to the drive shaft, which is aligned with the rotation axis of the brush body 12. The output shaft of the drive motor 17 can then be connected to the drive shaft via a gear chain or, for example, a toothed belt.

[0103] According to the embodiment shown in the accompanying drawings, the brush body 12 includes a first end 12.1 and a second end 12.2. The first end 12.1 is located near the drive device 16 and defines the motor recess 21. The second end 12.2 is supported by a sealing plug 15 and is rotatably mounted relative to the sealing plug 15.

[0104] The rotating brush 11 also includes a centering device 22 disposed in the brush body 12, which is configured to cooperate with a complementary centering device 23 belonging to the drive device 16, thereby centering the brush body 12 relative to the drive shaft 18; and a connecting device 24 disposed in the brush body 12 and configured to be rotatably connected to a complementary connecting device 25 belonging to the drive device 16 and rotatably connected to the drive shaft 18.

[0105] Advantageously, the complementary centering device 23 and the complementary coupling device 25 are also provided in the brush body 12. According to the embodiment shown in the figure, the coupling device 24 is axially offset from the centering device 22 in a direction parallel to the central axis A of the brush body 12, and the complementary coupling device 25 is axially offset from the complementary centering device 23 in a direction parallel to the drive shaft 18.

[0106] According to the embodiment shown in the figure, the centering device 22 includes a truncated conical centering wall 26 extending from the inner wall 27 of the brush body 12 and converging away from the drive shaft 18. Figures 4 to 6 In this embodiment, the truncated conical centering wall 26 extends from the inner wall 27 of the brush body 12 and converges away from the drive motor 17, i.e., towards the sealing plug 15. Advantageously, the truncated conical centering wall 26 is coaxial with the central axis A of the brush body 12 and is closer to the first end 12.1 than the second end 12.2.

[0107] The connecting device 24 includes a connecting portion 28 configured to mate with a complementary connecting portion 29 belonging to the complementary connecting device 25. According to the embodiment shown in the figures, the connecting portion 28 is a female connecting portion and the complementary connecting portion 29 is a male connecting portion. However, according to an alternative embodiment of the invention, the connecting portion 28 may be a male connecting portion and the complementary connecting portion 29 may be a female connecting portion.

[0108] According to the embodiment shown in the figure, a truncated conical centering wall 26 is disposed between the connecting portion 28 and the inner wall 27 of the brush body 12. Advantageously, the truncated conical centering wall 26 connects the connecting portion 28 to the inner wall 27 of the brush body 12.

[0109] According to the embodiment shown in the figure, the connecting portion 28 extends coaxially with the central axis A of the brush body 12 and includes a plurality of drive surfaces 31, for example six, which extend substantially parallel to the central axis A of the brush body 12 and are offset from each other at an angle relative to the central axis A of the brush body 12. Advantageously, the drive surfaces 31 are substantially flat and are evenly distributed around the central axis A of the brush body 12.

[0110] According to the embodiment shown in the figure, the complementary coupling portion 29 extends coaxially with the drive shaft 18 and has a plurality of complementary drive surfaces 33, for example six, that extend substantially parallel to the drive shaft 18 and are angularly offset from each other relative to the drive shaft 18. Advantageously, the complementary drive surfaces 33 are substantially flat and are evenly distributed around the drive shaft 18.

[0111] Each complementary drive surface 33 is configured to mate with a corresponding drive surface 31 in order to transmit torque from the output shaft 18 of the drive motor 17 to the coupling portion 28.

[0112] According to the embodiment shown in the figure, the complementary coupling portion 29 includes a plurality of drive ribs 35 that extend substantially parallel to the drive shaft 18 and are offset at an angle relative to each other. Advantageously, each drive rib 35 extends radially relative to the drive shaft 18.

[0113] Each drive rib 35 defines a corresponding complementary drive surface 33 and is more specifically configured to be inserted into a corresponding drive slot 36 disposed on the connecting portion 28 and defining a corresponding drive surface 31.

[0114] Advantageously, each drive rib 35 has a leading portion whose thickness decreases toward the leading end of the drive rib 35. More specifically, the leading portion of each drive rib 35 is configured to engage with the inner wall of the corresponding drive groove 36, and more specifically, to slide against the inner wall of the corresponding drive groove 36, so as to position each drive surface 31 facing, for example, against the corresponding complementary drive surface 33 when the brush body 12 is inserted into the receiving recess 9.

[0115] According to an alternative embodiment not shown in the figure, the complementary connection portion 29 may include a truncated conical central portion configured to engage with a truncated conical central recess disposed on the connection portion 28, thereby centering the connection portion 28 relative to the complementary connection portion 29.

[0116] According to the embodiment shown in the figure, the complementary centering device 23 is arranged around the complementary coupling device 25, and more specifically, around the complementary coupling portion 29, and includes a plurality of centering vanes 37, which are elastically deformable and angularly offset from each other relative to the drive shaft 18. Advantageously, the centering vanes 37 are evenly distributed around the drive shaft 18, substantially equidistant from the drive shaft 18, and extend from the outer periphery 38 of the complementary coupling portion 29.

[0117] More specifically, Figures 7 to 9 As shown, each centering vane 37 protrudes axially from the trailing edge of the complementary coupling portion 29, that is, from the edge of the complementary coupling portion 29 located on the side of the drive motor 17.

[0118] Advantageously, when the centering vane 37 is in a stationary position, i.e. when it has no elastic deformation, the centering vane 37 is tilted relative to the drive shaft 18 by an angle greater than half an angle at the apex of the truncated conical centering wall 26.

[0119] The drive unit 16 and the rotating brush 11 are more specifically configured such that when the brush body 12 is inserted into the receiving recess 9, the centering vane 37 contacts the centering device 22 disposed on the rotating brush 11, more specifically, contacts the truncated conical centering wall 26, and elastically deforms so as to automatically center the central axis A of the brush body 12 relative to the drive shaft 18 from the eccentric position of the brush body 12.

[0120] According to the embodiment shown in the accompanying drawings, the plurality of centering winglets include a first group and a second group. The first group includes a plurality of first centering winglets 37.1, and the second group includes a plurality of second centering winglets 37.2. Each first centering winglet 37.1 is disposed between two adjacent second centering winglets 37.2.

[0121] According to the embodiment shown in the figure, the drive device 16 includes a connecting member 39 (see figure). Figures 7 to 9 The connecting member is integral and includes a complementary connecting device 25 and a complementary centering device 23, more specifically, a complementary connecting portion 29 and a centering wing 37. The connecting member 39 may be made of, for example, plastic.

[0122] However, according to an alternative embodiment not shown in the figures, the complementary coupling device 25 may be different from and separate from the complementary centering device 23.

[0123] According to another alternative embodiment not shown in the figures, the centering vane 37 can be replaced by an annular centering collar, which is elastically deformable and substantially coaxial with the output shaft of the drive motor. Advantageously, the centering collar will project axially from the trailing edge of the complementary coupling portion 29.

[0124] According to another alternative embodiment not shown in the figure, the connecting portion 28 may include (instead of the aforementioned drive rib) a plurality of guide surfaces, such as three guide surfaces, which extend substantially helically about the central axis A of the brush body 12 and are angularly offset from each other relative to the central axis A of the brush body 12, and the complementary connecting portion 29 may include (instead of the aforementioned drive rib) a plurality of complementary guide surfaces, such as three, which extend substantially helically about the drive shaft 18 and are angularly offset from each other relative to the drive shaft 18, each guide surface being configured to engage with a corresponding complementary guide surface, more specifically, to slide against the corresponding complementary guide surface, so that when the brush body 12 is inserted into the receiving recess 9, each drive surface 31 is positioned facing, for example, against the corresponding complementary drive surface 33.

[0125] Advantageously, the guide surfaces are oriented in the same direction and are evenly distributed around the central axis A of the brush body 12, and each drive surface 31 is more specifically disposed between the leading and trailing edges of two adjacent guide surfaces.

[0126] Advantageously, the complementary guide surfaces are oriented in the same direction and are evenly distributed around the drive shaft 18, with each complementary drive surface positioned between the leading and trailing edges of two adjacent complementary guide surfaces.

[0127] Of course, the present invention is not limited to the embodiments described and shown, which are provided merely as examples. Modifications may be made, particularly in the configuration of various elements or through the substitution of equivalent techniques, without departing from the scope of protection of the present invention.

Claims

1. A suction head (2), comprising: - A main body (4) having a receiving recess (9) with an opening on the bottom surface of the main body (4), the bottom surface being configured to face the surface to be cleaned. - A rotating brush (11) comprising: a brush body (12) having a tubular shape around a central axis (A), the brush body (12) being intended to be mounted in a receiving recess (9) provided on the suction head, the brush body (12) being configured to be driven to rotate about a rotation axis by a drive device (16) belonging to the suction head, the rotation axis of the brush body (12) being coaxial with the central axis (A) of the brush body (12), characterized in that the rotating brush (11) further comprises: - A centering device (22), disposed in the brush body (12) and configured to cooperate with a complementary centering device (23) belonging to the drive unit (16) to center the brush body (12) relative to a drive shaft (18) connected to a drive motor (17) belonging to the drive unit (16), and - A connecting device (24), which is disposed in the brush body (12) and configured to be rotatably connected to a complementary connecting device (25), which belongs to the drive device (16) and is rotatably connected to the drive shaft (18). The brush body (12) defines a motor recess (21), and the drive motor (17) is intended to be at least partially housed within the motor recess. The brush body (12) is installed in the receiving recess (9), and - A drive device (16) configured to drive the brush body (12) to rotate about the rotation axis, the drive device (16) comprising: • Drive motor (17). • Drive shaft (18) connected to the drive motor (17). A complementary centering device (23), disposed in the brush body (12) and configured to cooperate with a centering device (22) disposed on the rotating brush (11) to center the brush body (12) relative to the drive shaft (18), and A complementary coupling device (25), rotatably connected to the drive shaft (18) and disposed in the brush body (12), is configured to be rotatably connected to a coupling device (24) disposed on the rotating brush (11). The complementary centering device (23) includes at least one elastically deformable centering element, which includes a plurality of elastically deformable centering vanes (37) that are angularly offset from each other relative to the drive shaft (18).

2. The suction head (2) according to claim 1, wherein, The complementary coupling device (25) is offset from the complementary centering device (23) in a direction parallel to the central axis (A) of the brush body (12).

3. The suction head (2) according to claim 1 or 2, wherein, The complementary connection device (25) is different from the complementary centering device (23) and is separate from the complementary centering device.

4. The suction head (2) according to claim 1 or 2, wherein, The drive unit (16) includes a connecting member (39), which is integral and includes the complementary connecting device (25) and the complementary centering device (23).

5. The suction head (2) according to claim 1 or 2, wherein, The complementary centering device (23) is arranged around the complementary connecting device (25).

6. The suction head (2) according to claim 1 or 2, wherein, The drive device (16) and the rotating brush (11) are configured such that when the brush body (12) is inserted into the receiving recess (9), the at least one elastically deformable centering element contacts the centering device (22) disposed on the rotating brush (11) and elastically deforms, thereby centering the brush body (12) relative to the drive shaft (18).

7. The suction head (2) according to claim 1 or 2, wherein, The at least one elastically deformable centering element is a centering collar, which is elastically deformable and coaxial with the drive shaft (18).

8. The suction head (2) according to claim 1 or 2, wherein, Each centering vane (37) is tilted relative to the drive shaft (18).

9. The suction head (2) according to claim 8, wherein, The centering device (22) includes a truncated conical centering wall (26) configured to converge away from the drive shaft (18), and in the rest position, each centering blade (37) is tilted relative to the drive shaft (18) by an angle greater than half an angle at the apex of the truncated conical centering wall (26).

10. The suction head (2) according to claim 1 or 2, wherein, The body (4) has a channel opening (13) that opens into the receiving recess (9), the brush body (12) being adapted to be introduced into and removed from the receiving recess through the channel opening, the suction head (2) including a sealing plug (15) configured to at least partially close the channel opening (13), and the brush body (12) being rotatably mounted relative to the sealing plug (15).

11. The suction head (2) according to claim 1 or 2, wherein, The drive shaft (18) is connected to the output shaft of the drive motor (17).

12. The suction head (2) according to claim 1 or 2, wherein, The drive shaft (18) is the output shaft of the drive motor (17).

13. The suction head (2) according to claim 1 or 2, wherein, The drive motor (17) is at least partially housed in the brush body (12).

14. The suction head (2) according to claim 1 or 2, wherein, The output shaft of the drive motor (17) is parallel to the drive shaft (18), and the drive motor (17) is located outside the rotating brush.

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