DE102014113517B4 - Self-cleaning brush system for cleaning surfaces - Google Patents

Abstract

Device comprising a brush (1) with at least one row of brushes with bristles (12), a driver (11), at least two partial bodies (9) each with two bearing surfaces (13), wherein an elastic deformation element (14) on at least one bearing surface (14). 13) of a part body (9) is mounted, wherein the part body (9) on the brush (1) facing away from patch cams (18), wherein the part body (9) at the ends with a coupling element (15) combined one Form hollow body (4), wherein the brush (1) and the hollow body (4) about a respective rotation axis (2, 3) rotatably mounted in a housing (19), wherein the axis of rotation (2) of the hollow body (4) in the same spatial level parallel and at a distance A to the rotation axis (3) of the brush (1) is arranged, wherein the distance A is smaller than the inner radius of the hollow body (4), wherein the hollow body (4) has at least one opening (7) wherein the bristles (12) of the brush (1) protrude outwards and protrude through the opening (7) of the hollow body (4) and at least one elastic deformation element (8) at least partially fills the opening (7), wherein at least one sliding surface (20) in the housing (19) is provided for cam (18).

Description

The present invention relates to brush systems or the like, and more particularly to a brush system of a floor cleaning machine rotating by a drive.

In the US 3,079,627 A discloses an electrically driven hairbrush, here a cylindrical brush is enclosed in a one-piece cage. Cage and brush are in turn positioned in a common housing. The also cylindrical cage, is much smaller in diameter than the brush housing, and smaller in diameter than the brush. The cage itself is eccentrically arranged with respect to the brush and has a plurality of slot-like openings in the circumferential direction. The apertures are uniform in type and size and aligned in the direction of movement of the bristles or the brush. The accordingly remaining webs between the apertures thus form a kind of comb. The movement of the cage is enforced solely by the pressure of the bristles which are permanently attached to the cage. The entrainment of the cage by the bristles inevitably results in a constant contact pressure, which in connection with the axial relative movement of the cage, although a cleaning effect of the bristles achieved, but also caused by the permanent grinding on the cage and excessive wear of the bristles.

Furthermore, from the Auslegeschrift DE 12 64 700 a brush for a floor cleaning device is known, which has a plurality of arranged on a roller body brush rows with bristles, a hollow body with openings and a housing, wherein the axis of rotation of the hollow body and the brush are arranged at a distance from each other, and wherein the bristles to the outside and in Operation partially protrude through the respective breakthrough of the hollow body.

Further disclosed US 4,492,241 A a hairbrush with a brush body and a hollow body, consisting of two part bodies with openings for the bristles.

Based on this, the object is to largely prevent the disadvantage of excessive wear of the bristles or wear and to increase the self-cleaning properties of the brush system.

In particular, the object of the invention by the arrangement of the brush system, the cleaning agent (brush, brush roller, bristles) continuously free of adhesions such as hair, dandruff, dust and / or other deposits.

This object is achieved in view of the features of claim 1.

The subclaims each describe advantageous embodiments of the invention.

To solve the problem, a brush system for a floor cleaning device is proposed, which prevents excessive wear of the detergent by the arrangement of individual components described below.

For this purpose, the brush system comprises a brush, preferably a rotationally symmetrical brush roller with at least one row of brushes, which is mounted rotatably about a stationary axis of rotation of a housing.

The housing is open to the cleaning surface to allow contact of the brush with the surface to be cleaned. Optionally, the housing also has at least one further opening, preferably a suction opening to which an extraction system is connected. Through the suction accumulated dirt as well as the various attachments are brought to the bristles to a collection container.

Irrespective of the speed of the floor cleaning appliance, the brush is set in rotation by a drive integrated in the housing, preferably an electric drive. Alternatively, the rotational movement of the drive will also be transmitted from outside the housing via a flexible shaft drive to the brush system.

Further arranged in the housing, a multi-part, at least two-part, preferably four-part, hollow body encloses the brush roller. The axis of rotation of the hollow body is parallel to a distance A from the axis of rotation of the brush roller. This causes during the rotation of the hollow body and the brush roller an axial relative movement of the hollow body with the brush roller.

The division of the hollow body in part body has the additional advantage that a particularly simple assembly in production is made possible by the pitch is adapted to the geometry of the bristle rows. Accordingly, the hollow body also has a straight or helical or helical pitch.

Each partial body of the one hollow body is provided with bearing surfaces. The support surfaces also define the surfaces for mating the part bodies and the surfaces of the physical bringing together of the part body. The bearing surfaces of the part body are designed for this purpose as flat surfaces.

At least one support surface of a part body is for this purpose provided with at least one elastic deformation element, which defines the gap height h of the resulting between the two part bodies opening during assembly of the part body with a further part body. In one embodiment, elastic deformation elements are mounted on or in the support surfaces, which are preferably glued. In this context, an elastic deformation element is understood to mean a component which gives way under load and returns to its original shape after being relieved, thus behaving elastically restoring. Optionally, recesses are provided in the bearing surfaces to prevent an undesirable change in position of the elastic deformation element. Alternatively, the recesses are introduced in the form of holes in the bearing surfaces. In this embodiment, no additional fixation is required by an adhesive tool.

By the elastic deformation elements on or in the recesses of the bearing surfaces, the desired gap height h of the associated aperture is variable. As a result of the assembly, the deformation elements on the bearing surfaces are correspondingly pre-stressed or prestressed. Thus, the gap height h of the aperture in the assembly is defined as maximum.

The bristles of the brush or brush roll stand out through the opening from the hollow body. The breakthrough is adapted to the arrangement of the bristles of the brush roller, thus resulting in a straight bristle row a gap-shaped straight breakthrough. The breakthrough results from a support surface with an elastic deformation element to the next support surface with an elastic deformation element, over the length of the hollow body and thus defines the gap length l. If the row of bristles is straight, spiral or helical, the opening is accordingly also straight, spiral or helical.

The opening itself begins and ends in each case on one of the contact surfaces of a part of the body.

Each breakthrough is advantageously filled with an over the gap length l extending elastic deformation element partially. The elastic deformation element is for this purpose preferably designed as an elongated profile, particularly preferably with a wiper lip. In a particular embodiment, recesses are provided in the elastic deformation element, which give the individual bristles of the row of bristles an additional guidance.

The hollow body, is composed by the at least two, preferably tubular shell-shaped partial bodies. Thus, this results in the assembly approximately a cylindrical hollow body. Alternatively, an angle-shaped, in particular L-shaped or a U-shaped configuration of the body part is possible, which results here in the assembly of a rectangular, or cuboid hollow body.

The part bodies are summarized or coupled in the assembly respectively at the ends of the body part with a coupling element, vorzugsweiser a cap sleeve. The coupling elements, however, still allow a relative movement, in particular a relative rotation between the part bodies themselves, based on the axis of rotation of the hollow body. By inserting the partial body into the coupling elements, on the one hand the maximum outer diameter of the hollow body is defined and, on the other hand, the elastic deformation elements are pretensioned or prestressed on or in the bearing surfaces. The coupling elements themselves are rotatably mounted in the housing. Between the coupling elements and the partial bodies, a spring-groove system is provided for torque transmission.

On the radially outward-facing, d. H. from the brush roller side facing away from the partial body are provided on the curvature of the body part patch cams. By a steadily increasing increase in the cams is provided with sliding surfaces provided in the housing, in each case a sliding contact. These sliding contacts cause a radially acting on the part body force component.

The partial body transmits this resultant force component to the elastic deformation elements and sprays them in such a way that the partial body located in sliding contact is rotated and / or displaced against the one or more partial bodies within the coupling elements. This causes in particular a reduction of the gap height h of the opening, which follows the cam in the direction of rotation. Alternatively, the sliding surface provided in the housing is substituted by a mounted roller or ball in order to minimize the friction caused by the sliding contact. The cam or alternatively a wedge-shaped elevation are dimensioned in height so that they are in contact with the sliding surface at a predetermined rotation interval of the brush or the hollow body.

Under the rotation angle or the rotation interval is here understood that angle, which has covered the brush / brush row since the sweeping, the surface to be cleaned, during its movement.

For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following descriptions of embodiments taken in conjunction with the accompanying drawings.

In the figures, which are not necessarily to scale, like components denote like components in different views. Like reference numerals have different letters as suffix and represent different examples of like components. The figures depict general illustrations which are exemplary and in no way to be construed as limitations on the various embodiments described in this document.

Hereby show:

1a and 1b schematic sectional views of an embodiment of the brush system with a brush roller with hollow body in the assembly,

2a a schematic perspective view of the modules / components of a brush system,

2 B a schematic sectional view of a brush system in the stripping position and the integration of an elastic deformation element in the breakthrough in detail,

2c a schematic sectional view of a brush system in the cleaning position and the integration of an elastic deformation element in the breakthrough in detail and

3 a schematic exploded view of a hollow body with part bodies and coupling elements.

1a shows a schematic sectional view of a brush system comprising a brush roller 1 which within a hollow body 4 is positioned. Here is the rotation axis 2 the brush roller 1 and the rotation axis 3 of the hollow body 4 arranged at a distance A parallel to each other. Furthermore, the brush roller includes 1 also a driver 11 , which for transmitting the rotational movement to the hollow body 4 serves.

1a and 1b shows the embodiment with a rotation angle of 0 ° or 180 °. With the rotation angle of 0 ° is just the position of the brush roller 1 assigned in which the bristles 12 , the first (lower) bristle row of the brush roller 1 , in its almost full length through the associated breakthrough 7 protrude. The bristles are not in this position on the elastic deformation element 8th on (cf. 1b below). This position also corresponds to the optimum cleaning position, since here the substrate to be cleaned (not shown), of the bristles 12 is reached. The bristles 12 the opposite (upper) row of bristles protrude in this position, rotation angle 180 °, only minimally through the associated breakthrough 7 and are located on the elastic deformation element 8th on both sides (cf. 1b above).

The by the sliding contact of the cam 18 with the housing 19 caused force F, on the one hand causes a force component F on the body part 9 ,

The assembly of the Koppelementen 15 and the partial bodies 9 is designed such that this relative displacement as well as a relative rotation of the body part 9 to still tolerate each other in the assembly. This is a tongue and groove connection 16 . 17 between the coupling elements 15 and the partial bodies 9 provided (cf. 3 ).

The gap height h of the breakthrough 7 is thus reduced by the acting force component whereby the elastic deformation element 8th in the breakthrough 7 with the bristles 12 got in contact.

Due to the relative axial movement between the brush roller 1 and the hollow body 4 , the adhesions become when pulling the bristles 12 in the hollow body 4 in interaction with the elastic deformation element 8th in the breakthrough 7 stripped off (cf. 2 B ).

The part bodies 9 are each by a coupling element 15 , here a cap sleeve, at the respective ends of the body part 9 positioned so that these to the hollow body 4 combined or combined (cf. 3 ). The in a designated recess in the support surface 14 one or glued elastic deformation elements 13 are biased by the assembly or combining. The assembly of the partial bodies 9 and the two coupling elements 15 is in the case 19 over the coupling elements 15 stored. Here act the outer surfaces of the coupling elements 15 partially also as Innengleitflächen a sliding bearing (not shown) in the housing 19 ,

1b shows how 1a a schematic sectional view of a brush system in the axial direction, comprising a brush roller 1 with two bristle rows with bristles 12 , the two axes of rotation 2 . 3 as well as two breakthroughs 7 , In the breakthroughs 7 are each elastic deformation elements 8th inserted, with the edges of the part body 9 thereby be inflated. However, the elevation of the edges of the partial bodies is lower than that Elevation, which by the attached or inserted elastic deformation element 13 on or in the bearing surfaces 14 is caused. On the outer surface of the part body 9 are cam-shaped with each increasing in the direction of rotation increases or cams 18 intended.

2a shows a schematic representation of the modules / components of the brush system with a brush 1 with two rows of brushes with bristles 12 and a hollow body 4 , which consists of two partial bodies 9 with two coupling elements (cap sleeves) 15 is composed. Likewise, a suitable brush roller 1 with two rows of brushes and a driver 11 shown.

2 B shows an enlarged sectional view in the side view of a brush system in stripping position. In detail, the breakthrough 7 as well as the integration of an elastic deformation element 8th in the part body 9 or in the hollow body 4 shown. In this brush position (rotation angle of 180 °), the stripping position is shown in the bristles 12 only minimal through the breakthrough 7 protrude and where the bristles 12 on the elastic deformation element 8th issue. The resulting gap height h is minimal in this context.

2c shows an enlarged sectional view in the side view of a brush system in cleaning position. In detail, the breakthrough 7 as well as the integration of an elastic deformation element 8th in the part body 9 or in the hollow body 4 displayed. In this brush position (rotation angle of 0 °) is the cleaning position, shown in the bristles with approximately their full length through the opening 7 protrude and the bristles 12 on the elastic deformation element 8th not present. The resulting gap height h is maximum in this context.

3 shows in an exploded view of the hollow body in a two-part design with coupling elements 15 , The shell-shaped part body 9 are at their respective ends with bearing surfaces 13 Mistake. Here is in each case an elastic deformation element 14 on a bearing surface 13 glued. The deformation elements 14 allow a relative movement of the body parts against each other, especially in the assembled state, which also the gap, in particular the gap height h of the breakthrough 7 changes (cf. 2a ). They also serve as spacers between the adjacent part bodies 9 and thus limit the gap height h down and the freedom of movement indirectly over the part body 4 and coupling elements 15 up. As already in 2 B shown is at minimized gap height h the deformation element 8th on the bristles 12 at. By changing the gap height h accordingly the contact pressure on the bristles 12 and thus the wiping action varies.

At a rotation angle 0 ° is the breakthrough 7 positioned parallel to the cleaning surface, and the bristles 12 the brush roller 1 protrude with the maximum possible length through the breakthrough 7 ( 1b below).

Spraying of the deformation elements 14 on the bearing surfaces 13 preferably starts at 195 ° rotation angle and ends at 359 ° rotation angle. This rotation interval thus defines the stripping interval for cleaning the bristles between 195 ° and 359 ° rotation angles. In this stripping interval, the bristles 12 through the associated breakthrough 7 and over the elastic deformation element 8th drawn. Due to the spraying of the deformation elements 14 is the gap height h of the breakthrough 7 minimal, and the bristles 12 are accordingly with a contact pressure on the elastic deformation element 8th in the breakthrough 7 stripped. This will cause undesirable adhesion to the bristles 12 pushed together and transported by the rotation to a suction position on. To further improve the self-cleaning of the bristles 12 is at the suction position an additional scraper (not shown) in the housing 19 intended. The angle of rotation of the suction position is basically adapted to the housing opening provided for aspiration. Thus, rotational angles of the suction position between 300 ° and 60 ° can be realized.

In the rotation interval between 0 ° and 180 °, the bristles 12 in the opposite directions outward through the breakthrough 7 pushed. Due to the low stiffness of the bristles 12 No axial load on the bristles in this rotation interval 12 because they otherwise buckle and are not available to the following cleaning process of the surface, cf. 2c , Here it is advantageous, the gap height h of the breakthrough 7 to vary so that it reaches its maximum gap height h. These are the elastic deformation elements 14 on the corresponding bearing surfaces 13 not or only slightly additionally sprained.

The rotation axis 3 of the multipart hollow body 4 is a distance A from the axis of rotation 2 the brush roller 1 spaced, cf. 1b , However, at a synchronous angular velocity (rotational speed) of the brush roller 1 with the hollow body 4 to ensure is on the brush roller 1 a driver 11 (see. 1a and 2a ), which controls the rotational movement by means of a bearing / guide of the hollow body 4 on the brush roller 1 transfers. The driver 11 is designed as a round bar and in the brush roller 1 firmly locked. In the hollow body 4 becomes the driver 11 axially guided by a bush, so that the axial distance change due to the spacing A of the two axes of rotation 2 . 3 of the hollow body 4 and the brush roller 1 in operation compensates. The driver 11 is dimensioned in its bending stiffness such that it exceeds the bending stiffness of the bristles 12 lies. Thus, the driver leaves 11 a slight twist of the part body 9 when using the sliding contact of the cam 18 to. Alternatively, also from the brush roller 1 the rotational movement on the hollow body 4 be transmitted.

In the foregoing detailed description, various features may be summarized to streamline the disclosure. This is to be construed as meaning that it is not intended that an unclaimed disclosed feature be important in any claim. Rather, the article according to the invention may be realized in less than all features of a separately disclosed embodiment.

LIST OF REFERENCE NUMBERS

1

Brush / brush roller

2

Rotation axis of the brush / brush roller

3

Rotation axis of the hollow body

4

hollow body

5

level

6

Distance A

7

breakthrough

8th

Elastic deformation elements in the breakthrough

9

partial body

10

storage

11

takeaway

12

bristles

13

bearing surface

14

Elastic deformation elements on / in the support surface

15

Coupling element / cap sleeve

16

groove

17

feather

18

cam

19

casing

20

sliding surface

F

Power / force component

H

Height of the breakthrough

l

Length of the breakthrough

Claims (8)

Device comprising a brush ( 1 ) with at least one row of brushes with bristles ( 12 ), a driver ( 11 ), at least two partial bodies ( 9 ) each with two contact surfaces ( 13 ), wherein an elastic deformation element ( 14 ) on at least one bearing surface ( 13 ) of a partial body ( 9 ), the part bodies ( 9 ) on the brush ( 1 ) facing away from patch cams ( 18 ), wherein the partial bodies ( 9 ) at the ends, each with a coupling element ( 15 ) combines a hollow body ( 4 ), wherein the brush ( 1 ) and the hollow body ( 4 ) by one axis of rotation ( 2 . 3 ) rotatable in a housing ( 19 ), wherein the axis of rotation ( 2 ) of the hollow body ( 4 ) in the same spatial plane parallel and at a distance A to the rotation axis ( 3 ) of the brush ( 1 ) is arranged, wherein the distance A is smaller than the inner radius of the hollow body ( 4 ), wherein the hollow body ( 4 ) at least one breakthrough ( 7 ), wherein the bristles ( 12 ) of the brush ( 1 ) stand out and through the breakthrough ( 7 ) of the hollow body ( 4 protrude through and at least one elastic deformation element ( 8th ) the break through ( 7 ) at least partially fills, wherein in the housing ( 19 ) at least one sliding surface ( 20 ) for cams ( 18 ) is provided. Device according to claim 1, characterized in that the brush ( 1 ) and the hollow body ( 4 ) in its rotational movement about the axes of rotation ( 2 . 3 ) by a driver ( 11 ) are coupled together, that the brush ( 1 ) and the hollow body ( 4 ) with the same angular velocity and in the same direction of rotation. Device according to claim 2, characterized in that the brush ( 1 ) around the axis of rotation ( 3 ) assumes a rotation angle between 0 ° and 360 °, wherein the breakthrough ( 7 ) of the hollow body ( 4 ) depending on the angle of rotation of the brush ( 1 ) around the axis of rotation ( 3 ) changes in height h. Apparatus according to claim 3, characterized in that the elastic deformation element ( 8th ) depending on the angle of rotation of the brush ( 1 ) on the bristles ( 12 ) is present. Apparatus according to claim 4, characterized in that the elastic deformation element ( 8th ) is provided with recesses, wherein the recesses for the bristles ( 12 ) make a guide. Device according to claim 5, characterized in that the hollow body ( 4 ) at least two partial bodies ( 9 ), which extend over the entire length of the hollow body. Apparatus according to claim 6, characterized in that on the bearing surfaces ( 13 ) of the Partial body ( 9 ) elastic deformation elements ( 14 ) are mounted. Device according to claim 7, characterized in that the part bodies ( 9 ) are U-shaped or angular or pipe-shell-shaped.

Images