CN112934805A

CN112934805A - Cleaning head for a high-pressure cleaning appliance

Info

Publication number: CN112934805A
Application number: CN202011433393.7A
Authority: CN
Inventors: 托马斯·菲亚克
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2019-12-11
Filing date: 2020-12-10
Publication date: 2021-06-11
Anticipated expiration: 2040-12-10
Also published as: CN112934805B; DE102019133980A1

Abstract

A cleaning head (10; 110) for a high-pressure cleaning appliance has an upper part (12; 112) with a coupling body (34) for coupling to the high-pressure cleaning appliance and a lower part (14; 114) which can be brought to rest on a surface (18) to be cleaned. In order to improve the cleaning head (10; 110) in such a way that it can be handled more easily, according to the invention the lower part (14; 114) is mounted on the upper part (12; 112) in such a way that it can pivot about a virtual pivot axis (16; 116), wherein the lower part (14; 114) and the upper part (12; 112) have bearing elements (78, 80, 100, 102) which cooperate with one another, and the virtual pivot axis (16; 116) is arranged offset relative to the bearing elements (78, 80, 100, 102) in the direction of the surface (18) to be cleaned, wherein the lower part (14; 114) can be detachably connected to the upper part (12; 112), and wherein the virtual pivot axis (16; 116) is at a distance of at most + -7 mm from the surface (18) to be cleaned.

Description

Cleaning head for a high-pressure cleaning appliance

Technical Field

The invention relates to a cleaning head for a high-pressure cleaning device for cleaning a surface, having an upper part with a coupling body for coupling to the high-pressure cleaning device and a lower part which can be brought into abutment against the surface to be cleaned.

Background

A surface, in particular a floor, a glass surface or e.g. a facade of a building, can be cleaned by means of such a cleaning head. The cleaning head constitutes an attachment for a high-pressure cleaning appliance and can be moved by a user along a surface to be cleaned. The cleaning head has a coupling body arranged on an upper portion of the cleaning head and coupleable to a high pressure cleaning apparatus. The connection between the coupling body and the high-pressure cleaning device can be realized, for example, by a pressure line, via which a cleaning medium under pressure, in particular a cleaning liquid under pressure, is supplied to the cleaning head for cleaning the surface.

The lower portion of the cleaning head can be abutted against a surface to be cleaned so that a user can move the cleaning head across the surface along the surface. Such cleaning heads are known to the person skilled in the art, for example from DE 102005048092B 4 and DE 102007029245 a 1.

Disclosure of Invention

The object of the invention is to improve a cleaning head of the type mentioned above such that it has a simpler operability.

In a cleaning head of this type, this object is achieved according to the invention in that the lower part is mounted on the upper part so as to be pivotable about a virtual pivot axis, wherein the lower part and the upper part have mutually cooperating bearing elements and the virtual pivot axis is arranged offset relative to the bearing elements in the direction of the surface to be cleaned, wherein the lower part can be detachably connected to the upper part, and wherein, in the use position of the cleaning head, the virtual pivot axis is at a distance of ± 7mm at most from the surface to be cleaned.

The cleaning head according to the invention has a lower part which can be brought into abutment against a surface to be cleaned, the lower part being pivotable relative to the upper part about a virtual pivot axis. The pivotability is achieved by mutually cooperating bearing elements arranged on the lower part and the upper part. The pivotability allows the lower part to be oriented at different pivot angles relative to the upper part and relative to a coupling body arranged on the upper part. This simplifies the guidance of the cleaning head along the surface to be cleaned for the user, in particular if the surface to be cleaned is not flat.

If the cleaning head is guided in the working direction along the surface to be cleaned, friction forces arise which the user must overcome. The rougher the surface to be cleaned, the greater the friction. The friction force may cause the cleaning head to tilt forward in the working direction, so that the lower part is lifted from the surface to be cleaned in its rear region relative to the working direction, and the front region of the lower part relative to the working direction is then pressed obliquely from above against the surface to be cleaned. Thus, the cleaning force results in a considerable overturning moment. To counteract such overturning moments, the lower part can be pivoted relative to the upper part about a virtual swivel axis, wherein in the use position of the cleaning head the virtual swivel axis is offset relative to the support element in the direction of the surface to be cleaned. Thus, when the cleaning head is in the use position, the distance of the virtual swing axis from the surface to be cleaned is smaller than the distance of the support element from the surface to be cleaned. In particular, it can be provided that the virtual pivot axis is arranged very close above, within or even below the surface to be cleaned. As a result of the relatively small distance of the virtual pivot axis from the surface to be cleaned, the tilting moment occurring as a result of the friction forces can be kept very small when guiding the cleaning head along the surface to be cleaned. As already mentioned, it can be provided in particular that the virtual swivel axis is arranged below the surface to be cleaned. As a result of such a positioning of the virtual pivot axis, if the frictional forces occurring during the guidance of the cleaning head along the surface to be cleaned are high, they can lead to the lower front region rising up relative to the working direction. The lower front region rises up so that irregularities and severe roughness of the surface to be cleaned can be overcome in a simple manner. This further simplifies the operation of the cleaning head according to the invention.

In the position of use of the cleaning head according to the invention, the distance of the virtual pivot axis from the surface to be cleaned is at most ± 7mm, in particular at most ± 5 mm.

The lower part of the cleaning head according to the invention can be detachably connected to the upper part. In particular, this makes it possible for the user to use different lower parts which are each matched to a solution of a different cleaning task. In this case, the user can also replace the damaged or worn lower part with a new one.

Advantageously, the cooperating bearing elements form at least one first bearing element and at least one second bearing element, wherein each first bearing element defines a guide track of circular arc shape, and the second bearing element bears slidably against the guide track of circular arc shape, wherein the guide track is oriented concentrically to the virtual pivot axis. In such a configuration, the cleaning head has at least one first bearing element which cooperates with a second bearing element to realize a lower pivotable bearing. At least one first support element forms a guide rail for the associated second support element. The second support element can slide on the guide rail of the first support element when the lower part is pivoted. The guide rail is designed in the shape of a circular arc, wherein the center of the circle defines a virtual swivel axis about which the lower part can pivot relative to the upper part. By suitably selecting the curvature of the guide rail in the shape of a circular arc, the virtual pivot axis can be positioned at a small distance above or below the surface to be cleaned, or also within the surface to be cleaned.

Preferably, at least one first support element is arranged on the lower part and at least one second support element is arranged on the upper part.

Advantageously, the at least one first bearing element is arranged on the lower part and forms a support member, on which the upper part is supported by means of the second bearing element. In such a configuration, the at least one first supporting element of the lower part carries the weight of the upper part.

In an advantageous embodiment of the invention, at least one first bearing element has a circular-arc-shaped sliding surface which is oriented concentrically to the virtual pivot axis and forms the guide rail. The second bearing element, which cooperates with the first bearing element for the pivotable bearing, can have a complementarily designed second sliding surface, which slidably bears against the sliding surface of the first bearing element.

Alternatively or additionally, it can be provided that the second bearing element has a plurality of bearing ribs which bear against the circular-arc-shaped sliding surface of the first bearing element. The support ribs can provide the second supporting element with a particularly high mechanical load-bearing capacity.

Advantageously, the second bearing element has a retaining member from which the supporting ribs project in the direction of the circular-arc-shaped sliding surface of the first bearing element. Such a design results in additional stabilization of the upper second supporting element.

The holding member is advantageously designed in the shape of a circular arc.

In particular, it can be provided that the circular arc-shaped holding element is oriented concentrically to the virtual pivot axis.

Advantageously, the lower part can be releasably locked with the upper part. This makes it easier for the user to replace the lower part, since the user only has to disengage the snap-lock connection between the lower part and the upper part for this purpose.

It is particularly advantageous if the latching connection between the upper part and the lower part can be released without tools.

In a preferred embodiment of the invention, the lower part has at least one first latching element which can be releasably latched to a second latching element arranged on the upper part, wherein the at least one first latching element forms a circular-arc-shaped first latching projection which is oriented concentrically to the virtual pivot axis and the second latching element engages behind the first latching projection. Such a design ensures that the lower part can be pivoted about the virtual pivot axis relative to the upper part without the latching connection between the lower part and the upper part being unintentionally released in a structurally simple and cost-effective manner.

Advantageously, the second latching element arranged on the upper part forms a circular-arc-shaped second latching projection which is oriented concentrically to the virtual pivot axis. The second latching projection of the upper part can engage the first latching projection from behind and, due to the circular-arc-shaped design of the two latching projections and their concentric orientation with respect to the virtual pivot axis, ensures that the latching connection between the lower part and the upper part cannot be released when the lower part is pivoted.

In a preferred embodiment of the invention, the second latching projection is held on the upper support element.

In particular, it can be provided that the second latching projection is integrally connected to the upper bearing element, so that the second latching projection and the associated bearing element together form the upper structural element.

No design options have been given in more detail so far with respect to the coupling body. As mentioned, the coupling body can, for example, serve to guide a pressure flow, under the effect of which the surface to be cleaned is cleaned.

It is advantageous if the coupling body is rigidly connected to the upper part. This improves the mechanical load carrying capacity of the cleaning head.

The coupling body is preferably arranged on the upper side of the upper part facing away from the lower part.

In a preferred embodiment of the invention, the upper part has a hood-shaped housing which is open in the direction of the lower part, in which housing at least one spray nozzle is arranged, and the coupling body forms a tube, by means of which the cleaning liquid under pressure can be applied to the at least one spray nozzle. The cleaning liquid under pressure, for example water which, if required, can be mixed with a cleaning chemical, can be directed under pressure against the surface to be cleaned by means of at least one spray nozzle. The pressure may be, for example, greater than 30 bar, in particular greater than 70 bar. The surface can be cleaned effectively by the action of the cleaning liquid under pressure. The cleaning liquid under pressure is supplied to the spray nozzle via a coupling body, which is designed as a tube. For example, a pressure hose or a jet pipe can be coupled to the coupling body, to which cleaning liquid under pressure is supplied from the high-pressure cleaning appliance through the jet pipe.

In a preferred embodiment of the invention, the lower part of the cleaning head according to the invention forms a retaining frame which surrounds the through-opening. For example, cleaning liquid under pressure can be sprayed onto the surface to be cleaned through the through-openings.

Advantageously, the cleaning body is held on the underside of the holding frame facing away from the upper part.

In a preferred embodiment of the invention, the cleaning body has a plurality of cleaning brushes. The cleaning brush can exert a mechanical cleaning action on the surface to be cleaned. It can also be provided that the cleaning brush forms a splash-proof protection for the cleaning liquid which is applied under pressure to the surface to be cleaned.

The cleaning brush can, for example, form a brush ring.

Alternatively, it can be provided that the cleaning body forms a dimensionally stable or dimensionally variable wiping sleeve, for example a wiping pad or a wiping cloth or a wiping felt. Such wiping sleeves can be used in particular for cleaning smooth surfaces, in particular for cleaning glass surfaces.

It is particularly advantageous if the cleaning element can be detachably connected to the lower retaining frame. This allows the user to replace a damaged or worn cleaning body without having to replace the entire lower part. In addition, contaminated cleaning bodies, for example contaminated wiping sleeves, can be detached from the lower holding frame and then cleaned.

Preferably, the cleaning body is detachably held on the holding frame by a hook-and-loop connection. This allows a particularly simple replacement of the cleaning body without special tools. Hook and loop connections are known to the person skilled in the art in different designs. The hook-and-loop connection has cooperating connection elements, such as hooks and eyes or hooks and velvet material, which are in this case fastened on the one hand to the retaining frame and on the other hand to the cleaning body.

Drawings

Two advantageous embodiments of the invention are explained in detail below with reference to the drawings. The figures are as follows:

figure 1 shows a perspective illustration of an advantageous first embodiment of a cleaning head according to the invention;

figure 2 shows a top view of the cleaning head of figure 1;

FIG. 3 shows a partial cross-sectional view of the cleaning head along line 3-3 in FIG. 2;

FIG. 4 shows an enlarged illustration of detail X in FIG. 3;

FIG. 5 shows a cross-sectional view of the cleaning head along line 5-5 in FIG. 4;

FIG. 6 shows a perspective illustration of the cleaning head of FIG. 1 with the upper portion raised from the lower portion for ease of understanding;

figure 7 shows a perspective illustration of an advantageous second embodiment of a cleaning head according to the invention;

figure 8 shows a perspective illustration of the cleaning head of figure 7 in an exploded view;

fig. 9 is a perspective view of the cleaning head of fig. 6, showing the cleaning body removed from the lower portion from obliquely below for easy understanding.

Detailed Description

Fig. 1 to 6 schematically show an advantageous first embodiment of a cleaning head according to the invention. The cleaning head is generally indicated by reference numeral 10 and has an upper part 12 and a lower part 14 which are releasably connectable to each other and pivotable relative to each other about a virtual swing axis 16. The cleaning head 10 is used to clean a surface 18, such as a floor, a glass surface or e.g. a facade of a building. The cleaning head 10 can be moved to and fro along the surface 18 to be cleaned in the working direction indicated by the arrow 20, wherein the lower part 14 can rest against the surface 18 to be cleaned. To avoid irregularities and roughness of the surface 18 to be cleaned, the lower part 14 can be pivoted relative to the upper part 12 about the virtual swivel axis 16. The virtual pivot axis 16 is oriented perpendicular to the working direction 20.

The upper part 12 has a hood-shaped housing 22 which is open in the direction of the lower part 14. The housing 22 has an end side 24 and a rear side 26 oriented substantially perpendicular to the working direction. Furthermore, the housing has a first longitudinal side 28 and a second longitudinal side 30, which are oriented substantially parallel to the working direction. Furthermore, the housing 22 has an upper side 32. On the upper side 32, a coupling body 34 is fastened, which can be coupled by means of a beam tube, not shown in the figures, known per se, to a high-pressure cleaning device, also not shown in the figures, known per se. The coupling body 34 forms a tube 36 which carries a bayonet fitting 38 on its free end facing away from the upper part 12, to which bayonet fitting the beam tube can be coupled.

In the illustrated embodiment, the hood-like housing 22 encloses a spray device 40 that is coupled to the tube 36 and has a spray beam 42 to which a plurality of

spray nozzles

44, 46, 48, 50 are coupled. By means of the

spray nozzles

44, 46, 48, 50, a pressurized cleaning liquid can be sprayed onto the surface 18 to be cleaned, which cleaning liquid is supplied from the high-pressure cleaning device to the

spray nozzles

44, 46, 48, 50 via the spray beam 42 and the pipe piece 36 and the aforementioned spray beam lines.

The lower part 14 forms a retaining frame 52 which is substantially rectangular in plan view, the retaining frame 52 enclosing a central through-opening 54. The cleaning liquid supplied by the

spray nozzles

44, 46, 48, 50 can be directed through the central through-opening 54 onto the surface 18 to be cleaned.

The holding frame 52 carries on its underside facing away from the upper part 12 a cleaning body 56 which has a plurality of cleaning brushes 58 which form a brush ring 60 which surrounds the through-opening 54. The cleaning body 56 serves in particular as a splash protection, in order to prevent liquid sprayed onto the surface 18 to be cleaned from escaping outwards from the region of the surface 18 covered by the cleaning head 10.

The retaining frame 52 has an outer retaining ring 62 and an inner retaining ring 64, between which an annular receptacle 66 is formed on the upper side of the retaining frame 52 facing the upper part 12, into which the hood-shaped housing 22 is sunk with a free edge 68.

The inner retaining ring 64 is formed by a front annular wall 70, a rear annular wall 72, and first and second

longitudinal walls

74, 76. The front and rear

annular walls

70, 72 are oriented substantially perpendicular to the working direction 20, and the first and second

longitudinal walls

74, 76 are oriented substantially parallel to the working direction 20.

The lower part 14 has, on the mutually facing sides of the two

longitudinal walls

74, 76 of the inner retaining ring 64,

first bearing elements

78, 80, respectively, which have, on their upper side facing the upper part 12, circular-arc-shaped guide rails in the form of circular-arc-shaped sliding

surfaces

82 or 84.

The sliding surfaces 82, 84 are oriented concentrically to the virtual pivot axis 16, i.e. the virtual pivot axis 16 connects the imaginary centers of the circular arc-shaped sliding

surfaces

82, 84.

The outer retaining ring 62 of the lower portion 14 has an end side region 88, a rear region 90, and first and second

longitudinal regions

92, 94. The end regions 88 run substantially parallel to the front ring wall 70 of the inner holding ring 64, while the rear regions 90 run substantially parallel to the rear ring wall 72 of the inner holding ring. The first longitudinal zone 92 runs substantially parallel to the first longitudinal wall 74 of the inner retaining ring 64, while the second longitudinal zone 94 runs substantially parallel to the second longitudinal wall 94 of the outer retaining ring 64.

On the sides of the

longitudinal regions

92, 94 facing the

longitudinal walls

74, 76, the lower part 14 has a

first latching element

95, 97, respectively, which is opposite the

first support element

78 and 80 and is formed by a

first latching projection

96, 98 of the shape of a circular arc which is oriented concentrically to the virtual pivot axis 16.

The upper part 12 has second bearing

elements

100, 102 on the first longitudinal side 28 and the second longitudinal side 30 of the housing 22, respectively, which form a circular-arc-shaped holding

member

104 or 106 oriented concentrically to the virtual pivot axis 16, from the underside of the holding

member

104 or 106 facing the lower part 14 a plurality of mutually parallel oriented support ribs 108 projecting. The support ribs 108 of the retaining

members

104, 106 are located on the sliding faces 82 or 84 of the

first bearing elements

100, 102 of the lower part 14, respectively. The

first bearing elements

78, 80 of the lower part 14 thus constitute support members on which the upper part 12 is supported.

The

second bearing elements

100, 102 each carry a

second latching element

99, 101 on their free edges facing away from the

longitudinal sides

28 and 30 of the upper part 12, which second latching elements are formed by circular-arc-shaped second latching

projections

103, 105, which are oriented concentrically to the virtual pivot axis 16.

The upper portion 12 may be placed onto the lower portion 14. In this case, the

second bearing elements

100, 102 are located on the sliding

surfaces

82, 84 of the

first bearing elements

78, 80, and the

second latching projections

103, 105 engage the

first latching projections

96, 98, respectively, from behind. The upper portion 12 can also be removed from the lower portion 14 again, if desired, for example to replace the lower portion 14.

As already mentioned, the lower part 14 can pivot relative to the upper part 12 about the virtual swing axis 16. For this purpose, the

second support elements

100, 102 cooperate with the

first support elements

78, 80 by causing each

second support element

100, 102 to slide along the circular arc-shaped sliding

surfaces

82, 84 of the

first support elements

78, 80. The virtual pivot axis 16 is defined by the imaginary center of the circular arc-shaped sliding

surfaces

82, 84 and is offset relative to the

first bearing elements

78, 80 and the

second bearing elements

100, 102 in the direction of the surface 18 to be cleaned. In the illustrated embodiment, the virtual pivot axis 16 runs in the region of the cleaning brush 58 at a small distance from the surface 18 to be cleaned. The distance of the virtual pivot axis 16 from the free end of the cleaning brush 58 not in use may be less than 5mm, for example. Provision may also be made for the virtual pivot axis 16 to be arranged in the surface 18 to be cleaned or below the surface 18 to be cleaned.

As a result of the virtual pivot axis 16 occupying a small distance from the surface 18 to be cleaned, the friction forces occurring when the cleaning head 10 is guided along the surface 18 to be cleaned either cause no or only a small overturning moment, so that there is virtually no risk of the cleaning head 10 overturning forward when it is moved in the working direction 20, and the cleaning brush 58 arranged on the underside of the rear region 90 of the outer retaining ring 62 is lifted off the surface 18 to be cleaned. The low overturning moment also makes it easier for the user to move the cleaning head 10 along the surface to be cleaned. Even uneven and/or very rough surfaces 18 can be cleaned easily by means of the cleaning head 10.

An advantageous second embodiment of a cleaning head according to the invention is schematically illustrated in figures 7, 8 and 9, the cleaning head being generally indicated by reference numeral 110. The cleaning head 110 is designed substantially the same as the cleaning head 10 described above with reference to figures 1 to 6. Therefore, the same reference numerals as in fig. 1 to 6 are used in fig. 7, 8 and 9 for the same members, and the above description is avoided from being repeated with respect to these members.

The cleaning head 110 has an upper part 112 and a lower part 114, wherein the lower part 114 can be pivoted relative to the upper part 112 about a virtual swivel axis 116, which is arranged at a small distance from the surface to be cleaned, in order to keep the overturning moment occurring when guiding the cleaning head 110 along the surface 18 to be cleaned small.

The cleaning head 110 differs from the cleaning head 10 in that the lower part 114 has a retaining frame 116 on the underside of which a cleaning body 118 in the form of a wiping sleeve 120 is releasably retained. Thus, unlike the cleaner head 10, the cleaner head 110 does not have a brush ring 60, but rather the cleaner head 110 has a wiping sleeve 123 which can be disengaged from the lower portion 114 for cleaning thereof.

In order to connect the wiping sleeve 123 in a releasable manner with the retaining frame 116, a hook-and-loop connection 125 is used, which hook-and-loop connection 125 per se is known to the person skilled in the art and is therefore only schematically illustrated in fig. 9. By means of the hook-and-loop connection 125, the wiping sleeve 123 of the cleaning head 110 can be detached from the retaining frame 116 in a simple manner without special tools in order to clean the wiping sleeve 123. The cleaned wiping sleeve 123 can then be connected to the retaining frame 116 again by means of the hook-and-loop connection 125.

Claims

1. Cleaning head for a high-pressure cleaning device for cleaning a surface (18), having an upper part (12; 112) with a coupling body (34) for coupling to the high-pressure cleaning device and a lower part (14; 114) which can be brought into abutment against the surface (18) to be cleaned, characterized in that the lower part (14; 114) is mounted on the upper part (12; 112) so as to be pivotable about a virtual pivot axis (16; 116), wherein the lower part (14; 114) and the upper part (12; 112) have mutually cooperating bearing elements (78, 80, 100, 102) and the virtual pivot axis (16; 116) is arranged offset relative to the bearing elements (78, 80, 100, 102) in the direction of the surface (18) to be cleaned, wherein the lower part (14; 114) can be detachably connected to the upper part (12; 112), and wherein, in the position of use of the cleaning head (10; 110), the distance between the virtual pivot axis (16; 116) and the surface to be cleaned (18) is at most + -7 mm.

2. A cleaning head according to claim 1, characterized in that the mutually cooperating bearing elements constitute at least one first bearing element (78, 80) and at least one second bearing element (100, 102), wherein each first bearing element (78, 80) defines a guide track of circular arc shape on which the second bearing element (100, 102) is slidingly applied, wherein the guide track is oriented concentrically to the virtual swivel axis (16, 116).

3. A cleaning head according to claim 2, characterized in that the at least one first support element (78, 80) is arranged on the lower part (14; 114) and constitutes a support member on which the upper part (12; 112) is supported.

4. A cleaning head according to claim 2, characterized in that the at least one first support element (78, 80) has a sliding surface (82, 84) in the shape of a circular arc, which sliding surface (82, 84) is oriented concentrically to the virtual swivel axis (16; 116) and constitutes the guide rail.

5. A cleaning head according to claim 4, characterized in that the second support element (100, 102) has a plurality of support ribs (108) which bear against the sliding surface (82, 84).

6. A cleaning head according to claim 5, characterized in that the second support element (100, 102) has a retaining member (104, 106), from which the support rib (108) projects in the direction of the sliding face (82, 84).

7. A cleaning head according to claim 6, characterized in that the retaining member (104, 106) is designed as a circular arc.

8. A cleaning head according to claim 7, characterized in that the retaining member (104, 106) is oriented concentrically to the virtual swivel axis (16; 116).

9. A cleaning head according to claim 1, characterized in that the lower part (14; 114) is releasably lockable with the upper part (12; 112).

10. A cleaning head according to claim 9, characterized in that the lower part (14; 114) has at least one first latching element (95, 97) which can be releasably locked with a second latching element (99, 101) arranged on the upper part (12; 112), wherein the at least one first latching element (95, 97) forms a first latching projection (96, 98) of circular arc shape which is oriented concentrically to the virtual pivot axis (16, 116), and the second latching element (99, 101) engages the first latching projection (96, 98) from behind.

11. A cleaning head according to claim 10, characterized in that the second latching element (99, 101) constitutes a circular arc shaped second latching projection (103, 105) oriented concentrically to the virtual swivel axis (16; 116).

12. A cleaning head according to claim 11, characterized in that the second latching projections (103, 105) are retained on the support elements (100, 102) of the upper part (12; 112).

13. A cleaning head according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, characterized in that the coupling body (34) is arranged on an upper side (32) of the upper part (12, 112) facing away from the lower part (14).

14. A cleaning head according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, characterized in that the upper part (12; 112) has a hood-shaped housing (22) which is open in the direction of the lower part (14; 114), in which housing at least one spray nozzle (44, 46, 48, 50) is arranged, and the coupling body constitutes a tube (36) through which cleaning liquid under pressure can be applied to the at least one spray nozzle (44, 46, 48, 50).

15. A cleaning head according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, characterized in that the lower part (14; 114) constitutes a retaining frame (52; 119) which surrounds a central through opening (54).

16. A cleaning head according to claim 15, characterized in that a cleaning body (56; 121) is held on the underside of the holding frame (52; 119) facing away from the upper part (12; 112).

17. The cleaning head according to claim 16, characterized in that the cleaning body (56) has a large number of cleaning brushes (58).

18. A cleaning head according to claim 17, characterized in that the cleaning brush (58) constitutes a brush ring (60).

19. A cleaning head according to claim 16, characterized in that the cleaning body (121) constitutes a form-stable or form-variable wiping sleeve (123).

20. The cleaning head according to claim 16, characterized in that the cleaning body (56; 121) is detachably connectable with the holding frame (52).

21. The cleaning head according to claim 20, characterized in that the cleaning body (121) is releasably held on the holding frame (119) by means of a hook-and-loop connection (125).