DE102010037672A1 - Sweeping brush for e.g. sweeping device utilized in household area, has bunch of bristles that run with respect to longitudinal extension at lateral distance around rotational axis of hub - Google Patents

Abstract

The sweeping brush (10) has a bunch of bristles (12) extending around a rotational axis of a hub. The bunch of bristles is held in the hub and radially accommodated outside the hub in one of bending-resistant elongated retainers. The retainers are arranged with respect to longitudinal extension of the bunch of bristles. The bunch of bristles runs with respect to the longitudinal extension at a lateral distance around the rotational axis. The rotational axis is bent in an operation direction of a floor cleaning device (1).

Description

The invention relates first of all to a sweeping brush rotatable about an axis oriented on a vertical axis and having bristle tufts extending radially outward from the axis of rotation, wherein a hub is formed in which the bristle tufts are held.

Furthermore, the invention relates to an automatically movable floor cleaning device with a rotatable about a vertical axis oriented sweeping brush with radially outward to the axis of rotation extending bristle tufts, wherein a hub is formed, in which the bristle tufts are supported.

Floor cleaning equipment of the type in question are known, so on, in particular in the form of autonomously operating suction and / or sweeping equipment, which find particular application in the household sector. In this regard, it is further known, if appropriate, in addition to a suction treatment of the floor to be cleaned to offer a brushing of the same, for which purpose more preferably a rotatable about a horizontal axis bristle roller is provided. In order to further offer an improved edge cleaning, for example along baseboards or the like, further solutions are known in which such a floor cleaning device has at least one sweeping brush whose axis of rotation is oriented oriented to a vertical, corresponding along a vertical or at an acute angle 5 ° to 15 ° to this running. In this regard, for example, on the EP 1 437 958 B1 directed. The content of this patent is hereby incorporated in full into the disclosure of the present invention, also for the purpose of including features of this patent in claims of the present invention.

In view of the above-described prior art, a technical problem of the invention is seen in a sweeping brush of the type in question or an automatically movable floor cleaning device with such sweeping brush in particular with regard to improved cleaning of the soil in an advantageous manner.

This problem is initially and essentially solved both with respect to the rotatable sweeping brush as well as respect. The automatically movable floor cleaning device by the subject of claim 1 or 2, being geared to a bristle tufts radially outside the hub in a rigid, radially externally directed, elongated recording is taken, wherein two images of two adjacent bristle tufts are arranged diverging with respect to their longitudinal extension and / or that the bristle tufts with respect to their longitudinal extension at a lateral distance in any case with regard to an imaginary extension of the bristle tufts to the axis of rotation of the hub. According to the proposed solution, an improved edge cleaning is advantageously made possible, this more preferably with respect to the known prior art lower speed of the activated sweeping brush, more preferably, according to the solution is a throw-away of particles during Kehrabreinigung counteracted. Due to the provided elongated, rigid, d. H. Under normal stress in the course of a sweeping from their elongated shape or only under increased force bendable recording, the bundled therein and preferably made of a plurality of filaments bundled bristle tufts and thus stiffened. In this case, the receptacle preferably extends directly starting from the hub in the direction of the free end of the tuft of bristles, which preferably protrudes over freely in accordance with the circumferential edge contour of the hub. Here, in one embodiment, the receptacle is attached directly to the hub and can also serve for comprehensive support and anchoring of the bristle tufts. Alternatively, the bristle tufts are anchored in the hub, so for example. According to encapsulation of the hub-side bristle tufts with a hard plastic material for forming the hub. This is in such an embodiment, for example. Tube-like design and pushed over the filaments of the bristle tufts in particular until it stops at an associated Nabenrandkante, which further example. According to heat, the holder of the recording on the bristle tufts, for example. Further, shrinkage can be ensured. The receptacles of two immediately adjacent bristle tufts are arranged, in particular in the case of an immediate anchoring of the receptacles on the hub, such that they extend in a manner diverging radially outward relative to one another. Alternatively or as further preferred in combination with the formation of a previously described receptacle, in a further embodiment the tufts of bristles - and correspondingly the receptacles preferably provided - are arranged in such a way that they deviate from a strictly radial with respect to the axis of rotation. An imaginary extension of the radially outwardly facing free end of the tufts opposite ends laterally spaced from the axis of rotation of the hub, so further preferably with respect to a projection in the vertical direction, the hub tangent or, more preferably, secant-cutting. It is thereby provided a total skewing arrangement of the bristle tufts and the further preferred provided receptacles relative to the axis of rotation of the hub.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 1 or claim 2 or with features of further claims. But they can also be in an assignment to only individual features of claim 1 or claim 2 or the respective further claim or each independently of importance.

Thus, in a further preferred embodiment, two or more, preferably less than twenty bristle tufts are provided, which are further preferably each received in a rigid, radially outwardly directed and elongated receptacle. Preferably, four to ten, more preferably six bristle tufts are provided, which are arranged distributed uniformly in the circumferential direction of the hub, so that correspondingly more preferably equal angles are enclosed between two bristle tufts adjacent in the circumferential direction. The determination of the bristle tufts directly on the hub or alternatively indirectly via the associated receptacles is preferably achieved in a common, aligned transversely to the axis of rotation of the hub plane.

The receptacle bundling the picked-up bristle tufts is further preferably provided with respect to the axis of rotation of the hub to a diameter which is one third to two thirds of the outermost diameter of the bristle tufts. It is further preferred in this context that, based on the longitudinal extent of a filament of a bristle tufts, the length of the receptacle corresponds to a quarter to three quarters, preferably half the length of a filament, in particular of the radially outwardly projecting beyond the hub portion of a filament. Preferably, find filaments having a length of about 60 mm to 80 mm, more preferably 70 mm, use, which consist of preferably in cross-section round plastic fibers with a diameter of 0.1 mm to 0.3 mm, more preferably 0.2 mm , These individual filaments are combined to form a bristle tuft, which is preferably bundled to a length of 30 mm to 40 mm, preferably 35 mm. This bundling takes place starting from the hub in the direction of the filament ends. Accordingly, a radially outer free length of the filaments or bristle tufts remains from 30 mm to 40 mm, preferably 35 mm.

Further, a good edge cleaning is achieved according to an embodiment in which the bristle tufts are inclined with respect to a transverse plane to the axis of rotation of the hub at an angle of 8 ° to 15 °, more preferably 10 ° to 12 °, such that the bristle tufts run inclined in the operating position in the direction of the ground to be cleaned. Accordingly, the free bristle ends, at least in an unloaded position, are preferably spaced apart in the direction of the rotation axis extension to the facing underside of the hub.

In a further advantageous embodiment, the axis of rotation is inclined in the usual direction of travel of the floor cleaning device, more preferably, the axis of rotation to a vertical angle of 4 ° to 8 °, more preferably 5 ° to 7 °, such as. 6 °, includes. As a result, in the usual direction of travel of the device in the course of the rotation of the sweeping brush, the front filaments engage more strongly in the ground than the further filaments of the bristle tufts in the circumferential direction.

The sweeping brush is preferably moved at a speed of 100 to 200 U / min, more preferably 150 U / min during operation, wherein in a preferred embodiment, the radially outer filament ends of the bristle tufts have a circulation speed of 0.9 m / sec. to 1.5 m / s, preferably 1.2 m / s experienced.

The filament length is tuned to a favorable edge cleaning. Despite the selected low speed of the sweeping brush a good edge cleaning is achieved, with no particles are spun at long distances.

The hub may also be provided with only one bristle tuft, which is arranged and grasped as described above. A bristle with six bristle tufts proves to be favorable, with a bristle tuft preferably comprising 170 to 250 filaments, more preferably about 200 filaments. The material of the filaments is preferably a thermoplastic such as polybutylene terephthalate, alternatively a natural material such as animal bristles.

With regard to all specified value ranges, all intermediate values, in particular in 1-degree increments and / or 1-mm increments, are both in terms of a single or multiple narrowing of the specified range limits in, for example, the specified increment, from above and / or from below, as well to represent singular values within the stated ranges, are hereby included in the disclosure.

The invention is explained in more detail below with reference to the attached drawing, which represents only one exemplary embodiment. It shows:

1 a floor cleaning device in perspective view;

2 the bottom view of this;

3 the floor cleaning device in a partially cutaway side view;

4 a sweeping brush for placement in the floor cleaning device in a partially sectioned side view;

5 the top view according to arrow V in 4 ,

Illustrated and described first with reference to the 1 to 3 a self-propelled floor cleaning device 1 in the form of a sweeper, with a chassis 2 and one the chassis 2 covering cover 3 This continues with a total with respect to a plan view circular design of the floor cleaning device 1 ,

The autonomously working floor cleaning device 1 has a bristle roller rotatable about a horizontal axis x 4 on. The drive of the bristle roller 4 takes place via an electric motor arranged in the device, which moves from one further into the device 1 arranged accumulator is fed.

In the area of the bristle roller 4 is the device bottom 5 with a window-like cutout 6 provided by which the bristles 7 the bristle roller 4 over the underside of the bottom of the device 5 in addition to the sweeping cleaning of the floor to be cared for 8th protrude.

The by means of the bristle roller 4 Collected ground dust is thrown into a non-illustrated, rear dust collector.

The floor cleaning device 1 also has two, partly the bottom of the device 5 traversing wheels 9 on, wherein preferably each Verfahrrad 9 is driven by a separate electric motor, which in addition to the usual straight-line method of the device 1 also a turning or turning the same is possible.

The bristle roller 4 is more preferably in a range between the spaced-apart traversing wheels 9 positioned.

In order to clean in corners or for example along baseboards, etc., are two in the usual direction of travel r of the floor cleaning device 1 in front of the bristle roller 4 and transverse to the direction of travel r spaced sweeping brushes 10 intended. These are essentially each composed of a drivable hub 11 with a substantially circular floor plan and in the illustrated embodiment six circumferentially equally distributed on the hub 11 arranged bristle tufts 12 ,

Every sweeping brush 10 is a over a wave 15 on the hub 11 the sweeping brush 10 acting electric motor 13 assigned. Alternatively, for the two sweeping brushes 10 only an electric motor provided, which has a corresponding translation to the two sweeping brushes 10 acts.

The arrangement of sweeping brushes 10 is here chosen further so that the hubs 11 within the floor plan of the floor cleaning device 1 lie, the bristle tufts 12 however, at least partially over, through the cover 3 protrude predetermined edge contour and thus transporting sweeping along baseboards or in corner areas the ground dust. As a result, dirt outside the device contour is detected and due to the preferred, opposite direction of rotation (see arrows d and d 'in 2 ) in the middle of the floor cleaning device 1 towards the bristle roller rotating about the horizontal axis x 4 transported. As this soft bristles protrude beyond the device contour, maneuverability and mobility of the floor cleaning device 1 not negatively affected.

The rotation axis y of each sweeping brush 10 extends with respect to a perpendicular to the preferably planar device bottom surface extending vertical at an acute angle α of preferably 6 °, wherein further the axis of rotation y according to this employment in the usual direction of travel r of the floor cleaning device 1 inclined. As a result, grab the free ends of the bristle tufts 12 or the free ends of a bristle tufts 12 forming filaments with respect to the usual direction of travel r in the forwardly directed area more into the ground or act more on the ground (here floor 8th ) as in the circumferential direction and in operation according to the direction of rotation further bristle tufts 12 , The opposite to the direction of travel r extending bristle tufts 12 are preferred from the floor 8th raised.

In addition, the bristle tufts 12 with respect to one to the axis of rotation y of the hub 11 considered transverse plane arranged inclined at an acute angle β of about 12 °, further in the operating position starting from the hub 11 inclined in the direction of the floor to be cared for 8th ,

The further preferred from a plurality of individual filaments, more preferably each consisting of about two hundred filament bristle tufts 12 roots in the illustrated embodiment in the hub 11 such that the bristle tufts 12 with reference to a top view according to 5 with respect to its longitudinal extent, further with respect to a central longitudinal extent of the bristle tufts 12 extending axis, with a lateral distance a to the axis of rotation y of the hub 11 run, at least in terms of one of the free end of the bristle tufts 12 outgoing, the hub 11 enforcing extension of the bristle tufts 12 or the central axis of the bristle tufts 12 , It is thereby a skewed arrangement of bristle tufts 12 relative to the hub 11 given. The latter are in the direction of rotation of the hub 11 tilted, with an imaginary central axis of the bristle tufts 12 the hub 11 secantally cuts.

In addition, the bristle tufts 12 or their filaments in one of the hub 11 outgoing area for stiffening a portion of the bristle tufts 12 caught. This is each bristle tufts 12 a recording 14 assigned, which is directed generally radially outward, elongated, more preferably tubular. In the illustrated embodiment, a one-piece design is uniform over the circumference of the hub 11 distributed shots 14 with the hub 11 shown.

The, the shots 14 penetrating bristle tufts 12 are inside the hub 11 anchored.

Every shot 14 extends from a circumferential hub wall radially outward over a length which is a stiffening of the bristle tufts 12 offers over half their extension length. Thus, the filaments preferably provided with a diameter of 0.2 mm have a length of about 70 mm, whereby the recording 14 these filaments or the bristle tufts formed thereby 12 bundled about a length of 35 mm and thus stiffened. So is any further recording 14 provided to a diameter b of preferably 80 mm, which is 0.4 to 0.6 times, preferably 0.5 times the outermost diameter c of the bristle tufts 12 equivalent.

Due to the defined stiffening the free filament length is adjusted to an optimal edge cleaning.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize in their optional sibling version independent inventive development of the prior art, in particular to make on the basis of these claims divisional applications.

LIST OF REFERENCE NUMBERS

1

floor unit

2

chassis

3

cover

4

bristle roller

5

Component shelf

6

neckline

7

bristles

8th

floor

9

Verfahrräder

10

sweeping brush

11

hub

12

tufts

13

electric motor

14

admission

a

distance

b

diameter

c

diameter

d

direction of rotation

d

direction of rotation

r

traversing

x

Horizontal axis

y

axis of rotation

α

angle

β

angle

15

wave

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1437958 B1 [0003]

Claims (8)

Around a vertical axis (y) rotatable sweeping brush ( 10 ) with radially outward to the axis of rotation (y) extending bristle tufts ( 12 ), whereby a hub ( 11 ) is formed, in which the bristle tufts ( 12 ) are held, characterized in that a bristle tufts ( 12 ) radially outside the hub ( 11 ) in a rigid, radially outwardly directed, elongated receptacle ( 14 ), wherein two images of two immediately adjacent bristle tufts ( 12 ) are arranged diverging with respect to their longitudinal extension and / or that the bristle tufts ( 12 ) with respect to their longitudinal extent with a lateral distance (a) in any case with regard to an imaginary extension of the bristle tufts ( 12 ) to the axis of rotation (y) of the hub ( 11 ). Automatically movable floor cleaning device ( 1 ) with a sweeping brush rotatable about a vertical axis (y) ( 10 ) with radially outward to the axis of rotation (y) extending bristle tufts ( 12 ), whereby a hub ( 11 ) is formed, in which the bristle tufts ( 12 ) are held, characterized in that a bristle tufts ( 12 ) radially outside the hub in a rigid, radially outwardly directed, elongated receptacle ( 14 ), whereby two recordings ( 14 ) of two immediately adjacent bristle tufts ( 12 ) are arranged diverging with respect to their longitudinal extension and / or that the bristle tufts ( 12 ) with respect to their longitudinal extent with a lateral distance (a) in any case with regard to an imaginary extension of the bristle tufts ( 12 ) to the axis of rotation (y) of the hub ( 11 ). Sweeping brush and / or floor cleaning appliance according to claim 1 or claim 2 or in particular according thereto, characterized in that two or more, preferably less than twenty bristle tufts ( 12 ) are provided. Sweeping brush and / or floor cleaning appliance according to one or more of the preceding claims or in particular according thereto, characterized in that the receptacle ( 14 ) to a diameter (b) which is one third to two thirds of the outermost diameter (c) of the bristle tufts ( 12 ) is. Sweeping brush and / or floor cleaning appliance according to one or more of the preceding claims or in particular according thereto, characterized in that, based on the longitudinal extension of a filament of a bristle tufts ( 12 ) the length of the recording ( 14 ) corresponds to a quarter to three quarters, preferably half the length of a filament. Sweeping brush and / or floor cleaning appliance according to one or more of the preceding claims or in particular according thereto, characterized in that the bristle tufts ( 12 ) with respect to one to the axis of rotation (y) of the hub ( 11 ) considered transverse plane at an angle (β) of 8 ° to 15 ° inclined. Sweeping brush and / or floor cleaning appliance according to one or more of the preceding claims or in particular according thereto, characterized in that the axis of rotation (y) in the usual direction of travel (r) of the floor cleaning appliance ( 1 ) inclined. Sweeping brush and / or floor cleaning appliance according to one or more of the preceding claims or in particular according thereto, characterized in that the axis of rotation (y) encloses a vertical angle to an acute angle (α) of 4 ° to 8 °.

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