EP2468130A2 - Rotating brush, in particular for hand tool machines - Google Patents

Abstract

The rotating brush has a hub (2) comprising two coaxial disks (7) which are axially fixed to each other. The radially projecting bristles (3) are provided at foot side of coaxial disks such that shorter bristles (5) are provided at edges, and longer bristles (6) are provided in middle.

Description

The invention relates to a rotating brush, in particular for handheld power tools, according to the preamble of claim 1.

State of the art

Rotating brushes are known as brush discs as well as brush rollers with radially projecting to their hub portion bristles or bristle bundles. The peripheral surfaces of these usually for grinding or cleaning purposes, the latter, for example, for rust removal, artisan brushes are continuously on the axis of rotation parallel brush width plan, possibly the edges are rounded. Depending on the intended use, bristles are steel wire bristles, polyamide bristles, fibrous bristles or the like.

For cleaning and / or processing of large areas such brushes are usually used in the form of rollers. Are the surfaces to be cleaned not flat, but structured, such as the often used as flooring for patios or terraces, surface grooved boards of mostly tropical woods, so the uniform detection of the surfaces to be cleaned and especially the cleaning in the grooves is right cumbersome. It often requires rework and not infrequently, sharp tools are used for this purpose, with a corresponding risk of injury to the user and in particular associated with the risk, for example by slipping of the tool to injure the lining structure and thus not only make unsightly or partially detached particles, like splinters causing injury. To restore the original color, the woods must now be embedded with a suitable pigment-containing oil.

After processing, this represents another time-consuming step. In addition, the oils pollute the environment.

Disclosure of the invention

The invention has for its object to design rotary brushes such that they are suitable, while avoiding the aforementioned disadvantages, especially for nourishing cleaning, for smoothing and recovery of natural wood color also provided by the surface side, preferably groove-like depressions.

This is achieved with the features of claim 1. The dependent claims indicate expedient developments.

Characterized in that the disc-shaped, in their disc width at least approximately the respective groove width corresponding brush has a formed by their bristles peripheral and over the brush width stage contour, this can be applied to the respective groove the groove bottom as well as the flanks of the groove at least into the area detect their transition into the surfaces lying between adjacent grooves. This can be achieved by the corresponding circumferential contours of the bristles of a brush and the groove into which the bristles, also a centering orientation of the brush to the respective groove. This is facilitated for hand-held machine tools their leadership and handling. This regardless of the fact that the respective groove in the entire groove area on the bristles in substantially the same manner in both the groove bottom as well as in the region of the flanks is applied, and that a complementary, otherwise stop guide can be provided.

For this purpose, it also proves particularly expedient if the bristles, regardless of their radial orientation transversely to the plane of the pane, are partially spread apart from one another. This in particular in such a way that the bristles aligned with the flanks are each inclined relative to the adjacent groove flanks with respect to the bristles facing the groove base.

With regard to the stepped circumferential contour with an elevation given in the central transverse region of the respective pane relative to the edge regions, it proves expedient for the bristles to be longer for the middle region than for the edge regions. The shorter and longer bristles may be formed in different thickness, strength and / or hardness as well as made of different materials. An expedient embodiment is that the longer bristles are thinner than the shorter bristles, preferably also thinner and more flexible than the shorter bristles. Conveniently, the bristles made of plastic, in particular polyamide, and this with a diameter of the bristles, which is of the order of one millimeter, in particular with corresponding deviations for the longer and shorter bristles.

Based on the structure of the brush, it proves to be expedient if the bristles are arranged clamped with respect to a hub, wherein the clamping can be done to the hub for all bristles on the same hub diameter, and the hub has a configuration that lying in the central transverse region Bristles on a larger diameter detected than the marginal bristles. In particular, it proves to be expedient if the hub is divided up of two axially connected hub parts, between which the bristles of a respective brush, in particular as a prefabricated bristle package, can be clamped.

In the context of the invention, it is particularly preferable to combine brushes in aforementioned disc-shaped configurations adjacent to one another to form a brush roller, wherein the spacing of the disk-shaped brushes joined to form the brush roller at least approximately corresponds to the spacing between two successive grooves in a respective surface structure. In the context of the invention is also an education as a one-piece brush roller with stepped over the roll width in the described meadow extending circumferential contour.

The axial distance between successive brush discs can be adjusted in a simple manner by spacers, in particular washers as spacers to the respective dimension, so that assemble with brushes according to the invention also brush rollers in each required dimensions to let. For this purpose, spacers are used according to the invention, which are axially elastic, so depending on the degree of optionally stop-limited elasticity and the amount of axial clamping force with which the brush discs are clamped, the respectively desired distance between the brush discs, if necessary, also on site adapt to the respective requirements.

The brushes can be clamped axially, for example, via a central clamping pin, which is also connected in a form-fitting manner with the brushes in a torque-transmitting manner as the brush-carrying shaft; This, for example, via appropriately matched non-circular cross sections or groove-like connections with, for example, along the clamping pin extending grooves and hub-side engaging lugs as springs.

When constructing such brush rollers, it proves to be particularly expedient to also form the spacers lying in the transition between successive disk-shaped brushes as brush sections, namely as brush sections with a constant circumferential contour over the respective width. For this purpose, the lying in the transition between the disc-shaped brushes spacers may for example be designed as sleeves, which are circumferentially provided in a corresponding manner with bristles which correspond in their radial length as the aligned on the flanks bristles of the disc-shaped brush parts.

In the context of the invention, it may also be expedient, both with respect to a single disc-shaped brush as well as brush rollers constructed using such disc-shaped brushes, to provide a stop guide for such a working unit, preferably in the transition between the working unit and its drive provided craft machine is, in principle, both a co-rotating stop guide as well as a stationary hand tool stop guide comes into question. The latter in particular as to be applied to the hand tool and applied against the flank of a groove guide member, comparable stop guides, as they are used as parallel guides in circular saws or the like.

Hand tool machines that are suitable for use with rotating brushes of the type according to the invention are often in their driving direction reversible, which is particularly true for drills, which also have a corresponding chuck to a rotating brush of the type according to the invention with the drill to a work unit connect. Such a switchable counter-rotating drive with a corresponding direction of rotation reversal for the brush offers in particular the possibility to work with the working unit in opposite directions of advance. This can be useful in order to take into account the respective direction of fiber flow of the workpiece to be machined with the brush, so also to remove chippings or to polish them in the opposite direction after a successful cleaning of the respective workpiece.

In particular with opposite directions of rotation for the brush, such different requirements can be accommodated in a particularly advantageous manner in that the bristles brush, relative to the respective bristle package, inclined against a radial, in the direction of the axis of rotation of the brush reference plane, in particular at an angle of only a few degrees, approximately up to 10 °, are arranged inclined, so that in one direction of rotation a more aggressive access to the respective workpiece to be machined is given as in the opposite direction, so initially, for example, a cleaning process is performed, and smoothed or polished when driven in the opposite direction becomes.

Basically, it is within the scope of the invention, a work unit of the aforementioned type, such as one consisting of a drill and the chuck and their associated chuck roller working unit to lead over the drill with this freely projecting brush roller. Depending on the size of such a unit, in particular depending on the axial length of the brush roller and the respective work-related part to be supported by the operator leadership and driving forces, but this can be very cumbersome and also lead to the work result impairing leadership inaccuracies.

According to the invention, it therefore proves to be expedient if the respective brush roller and the respective hand-held power tool connected to it connect to a working unit and via an additional, the brush roller cross-over Support structure are supported against each other. About such a support structure, for example, in a bridge-like cross-arrangement to the brush roller, a two-sided support of the brush roller can be achieved and connect with the possibility to facilitate the handling of the working unit. This is due to the fact that the support structure, similar to the handheld power tool, is also provided with access and handling surfaces, but optionally also with at least one grip part. The bridge-like cross-training of the support structure also offers the possibility of stabilizing the brush roller, so that it has the form stability required for the work and also satisfied in the vibration behavior with ease of training, especially easier training of the brush shaft forming chuck.

Relative to a drill as a hand tool and with this connected via their chuck brush roller, the support structure may preferably be designed as a bridge-like support frame, a supporting leg is supported on a guide surface of the power tool, especially in a drill whose collet is guided and the other leg of the drill stored remote free end of the clamping pin of the brush roller stock. This latter leg can be connected, for example, to the supporting leg connecting bridge web to a support angle, the support web is adjustably attached to the machine side support leg, so that on such an adjustment, the web length is adjustable, which offers mounting advantages, in particular the possibility of supporting structure in To adapt their size to the length of a respective brush.

The support structure may include at its connection end to the power tool, ie in particular to the drill, a gear unit, for example in the form of an angular gear, which makes it possible, provided for the drive of the brush roller hand tool, ie in particular drill, not only in the axial direction of the brush roller with this but also lying transversely thereto, so that there is a particularly advantageous under handling conditions working unit.

In the context of the invention, it is further to use the support structure functionally for other purposes, such as to design in a form, that it forms a dust collector, which is optionally also to be connected to a dust extraction device.

The invention thus provides a system as a whole, the use of a commercial hand tool, such as a hand drill, in conjunction with an additional tool in the form of a disc-shaped, rotating brush or brush to be cleaned and smoothing embedded in surfaces grooves, such as about the grooves of mostly made of tropical wood species decking made possible. This optionally also with simultaneous work engagement in a plurality of juxtaposed grooves by a disc-shaped brush brush roller, which can be equipped in the bridging region between successive disc-shaped brushes with additional brush sections.

Fig. 1 und 2

Ansichten einer rotierend anzutreibenden Bürste in Richtung der Rotationsachse und senkrecht hierzu,

Fig. 3

in Ansicht senkrecht zur Rotationsachse eine aus rotierend anzutreibenden Bürsten gemäß Fig. 1 und 2 aufgebaute Bürstenwalze, bei der die koaxial und beabstandet zueinander angeordneten scheibenförmigen Bürsten jeweils auf eine der zueinander benachbarten, parallel verlaufenden Nuten eines Werkstückes, insbesondere einer Bodendiele mit oberflächenseitig vorgesehenen Längsnuten, zugreifen,

Fig. 4

eine der Fig. 3 entsprechende perspektivische Darstellung, in der die Bürstenwalze mit einer Handwerkzeugmaschine antriebsverbunden ist, die im Ausführungsbeispiel als Bohrmaschine ausgebildet ist,

Fig. 5

eine stark schematisierte perspektivische Veranschaulichung des der Erfindung zugrunde liegenden Arbeitsprinzips zur Aufbereitung von ober-flächenseitig an Werkstücken vorgesehenen Nuten mithilfe von erfindungsgemäßen, rotierenden Bürsten,

Fig. 6 und 7

in einer weiteren schematisierten Darstellung eine Ausgestaltungsform einer rotierenden Bürste, die eingnreifend zu zwei nebeneinander liegenden und über einen Steg gegeneinander abgegrenzten Nuten arbeitet,

Fig. 8

eine der Fig. 1 entsprechende Ansicht, bei der die Bürste auf einen Spannzapfen aufgesetzt gezeigt und über eine Formschlussverbindung drehmomentübertragend mit diesem verbunden ist,

Fig. 9

einen Ausschnitt IX aus Fig. 3, in dem die axiale Zusammenspannung von Bürsten unter Verwendung von elastischen Distanzstücken als Zwischengliedern dargestellt ist,

Fig. 10

eine der Fig. 5 ähnliche Darstellung, in der schematisiert die Arbeitsweise einer Bürste bei entgegengesetzten Antriebsdrehrichtungen der zugehörigen, nicht dargestellten Antriebsmaschine, und bevorzugt auch bei entgegengesetzten Vorschubrichtungen gezeigt ist, und

Fig. 11 bis 13

Ausgestaltungen von Antriebseinheiten mit einer Handwerkzeugmaschine in Form einer Bohrmaschine als Antriebsmaschine einer Bürstenwalze und einer die Bürstenwalze gegen die Bohrmaschine abstützenden Tragstruktur.

Further details and features of the invention will become apparent from the claims, the description and the drawings. Show it:

Fig. 1 and 2

Views of a rotating brush to be driven in the direction of the axis of rotation and perpendicular thereto,

Fig. 3

in view perpendicular to the axis of rotation of a rotating to be driven brush according to Fig. 1 and 2 constructed brush roller, in which the coaxial and spaced-apart disc-shaped brushes each access one of the mutually adjacent, parallel grooves of a workpiece, in particular a floorboard with surface-side provided longitudinal grooves,

Fig. 4

one of the Fig. 3 corresponding perspective view in which the brush roller is drivingly connected to a hand tool, which is designed in the embodiment as a drill,

Fig. 5

a highly schematic perspective illustration of the invention of the underlying principle for the preparation of upper surface side provided on workpieces grooves using inventive, rotating brushes,

6 and 7

in a further schematic representation of an embodiment of a rotating brush, which works in tandem to two adjacent and via a web against each other delimited grooves,

Fig. 8

one of the Fig. 1 corresponding view, in which the brush is shown mounted on a clamping pin and connected via a positive connection torque-transmitting therewith,

Fig. 9

a section IX Fig. 3 in which the axial clamping of brushes using elastic spacers is shown as pontics,

Fig. 10

one of the Fig. 5 similar representation, in the schematic, the operation of a brush in opposite directions of driving the associated drive machine, not shown, and preferably also shown in opposite directions of feed, and

Fig. 11 to 13

Embodiments of drive units with a hand tool in the form of a drill as a drive machine of a brush roller and a brush roller against the drill supporting support structure.

In the Fig. 1 and 2 a first embodiment of a rotary brush 1 to be driven according to the invention is shown, which has a hub 2 and radially projecting to the hub 2 bristles 3. About the width of the brush 1 extending in the direction of the axis 4, this has a stepped circumferential contour. The gradation of the circumferential contour results from the fact that, based on the width of the brush 1, these bristles 5 at the edge shorter than in the center region with the bristles 6. In addition, the peripheral bristles 5 are preferably at a shallow angle to the vertical axis 4 Middle plane of the brush 1 is arranged, wherein this radially outwardly open angle in the Magnitude may be on average at about 20 °. Furthermore, it proves to be expedient if the middle, longer bristles 6 are thinner, and preferably also more flexible than the shorter bristles 5, wherein a diameter has proven to be expedient for the bristles 5, which is of the order of one millimeter. This relates in particular to bristles 5 made of plastic, preferably polyamide, with bristle lengths have proven to be appropriate, which are for the longer bristles 5 in the range of half the diameter of the hub 2.

The hub 2 has mutually parallel coaxial hub disks 7, which are axially fixed to one another and between which the bristles 3 are clamped with their foot-side ends. The hub disks 7 can be connected axially braced against each other, for example via radially inner collar parts.

Such a disk-shaped, rotating brush 1 may preferably be provided for cleaning groove-shaped recesses, so in particular for the cleaning and processing of surface side provided with longitudinal grooves 9 boards 8 are used, as used in particular as coverings for patio floors, outdoor seating or the like. Such planks are usually made of tropical woods, which are very resistant to rotting, but over time weathering surface gray side and embrittle. Thus, they lose the desired, even visually satisfactory smooth surface structure, associated with a certain tendency to splitting.

By using the disc-shaped brush 1 can, as in Fig. 5 in a flow chart - see arrow 31 - on a floor 8 with extending in its longitudinal direction grooves 9 and lying between the grooves 9 webs 10 illustrated in the grooves 9 and in the transition region of the grooves 9 in the webs 10 due to weathering resulting surface coverings are also removed as well as splinters are removed, as they arise, especially in the transition region of the webs 10 in the flanks of the grooves 9 by gap formation. Fig. 5 illustrated in a highly schematic form longitudinally first the abrasive Abtragen the weathering layer in the groove bottom and on the flanks by the long, middle bristles 6. In particular, the shorter, directed against the flanks bristles 5 also detect by splitting resulting chipping 11 by passing into the corresponding gap 12 intervene as in Fig. 5 shown in the middle. According to the usually in the longitudinal direction of the board 8, and thus also in the longitudinal direction of the grooves 9 extending fiber direction of the wood so the chipping 11 is detached from the flank, wherein the flank-side notch 13 resulting from this detachment is simultaneously smoothed and rounded. Thus, after removal of the coverings and the removal of such chips 11 there is a cleaned and smoothed surface, the appearance of which largely corresponds to the new condition.

Fig. 3 and 4 illustrate the construction of brush rollers 4 using disc-shaped brushes 1 in conjunction with the use of such brush rollers 14 for cleaning the grooves 9 of planks 8, as explained above using the example of the use of a brush 1.

For the construction of the brush rollers 14, the brushes 1 are axially and concentrically clamped together at a distance corresponding to the distance 15 between adjacent grooves 9, so that according to the number of clamped disc-shaped brushes 1, a number of adjacent grooves simultaneously processed and cleaned. It proves to be expedient if such a brush roller 14 comprises a number of disc-shaped brushes 1, which corresponds to the number of juxtaposed grooves 9 of a respective board 8.

Fig. 3 further illustrates a possibility of axial clamping of disc-shaped brushes 1 via a clamping pin 17 using spacers 18 located between the hubs 2 of the brushes 1, which can be formed as one-piece bushings or also formed by a plurality of spacers, which in a simple manner needs-based construction of brush rollers 14 allowed. The clamping pin 17 expediently extends beyond a clamping nut 19 protruding in a non-circular 20, for example, an n-edge, so that in the usual way the connection to a drive machine 21, in Fig. 4 a hand drill on the chuck 22 can be done. This type of connection to a conventional drilling machine also makes it possible to suitably use the depth stop or the like conventionally provided on drills as a guide element which, when engaging in a groove or attached to a longitudinal edge of the board 8, facilitates mutual alignment, taking into account is that on the engaging in the grooves brush 1 anyway a centering effect is achieved.

Corresponding to the distance 15 of adjacent grooves 9 and the relatively small spreading of the brushes 1 in the axial direction is a full-surface machining of the surface of the board 8 in the region of the webs when using disc-shaped brush according to Fig. 1 and 2 usually not given. In this regard, it is within the scope of the invention, the possibility to use as spacers 18 provided with radial bristles jacks, so that even with a corresponding length of the bristles provided on the bushes, the land areas are fully detect.

In addition is in Fig. 8 illustrates that the zusammenzusetzenden to a brush roller brush 14 1 not only via a clamping pin 17 axially clamped against rotation to each other and the clamping pin 17 can be set, but that advantageous solutions in the invention also consist in the torque-transmitting connection between the clamping pin 17 and the To make brushes 1 via a positive connection 32. Such a positive connection 32 illustrates, for example, the Fig. 8 , Namely by the hub disks 7 radially inwardly projecting projections in the form of ribs 33, which groove-shaped receptacles 34 on the part of the clamping pin 17 correspond, these groove-shaped receptacles 34 are preferably provided over the length of the clamping pin 17 continuously and so a simple assembly of Allow brushes 1 to a brush roller 14.

Fig. 9 illustrated as a detail view too Fig. 3 in that the axial clamping of brushes 1 to a brush roller 14 using a tensioning pin 17 can preferably also be designed so that the spacers 16 lying between the brushes 1 are axially elastic and thus variable in their axial support length in accordance with the tension force F so that the axial distance between brushes 1 following one another in the brush roller 14 can be adjusted as a function of the clamping force F. Such a solution is particularly suitable if, as in Fig. 8 illustrated in principle, the brushes 1 are connected to the clamping pin 17 as a shaft of the brush roller 14 torque transmitting form-fitting manner.

In the context of the invention is in particular a non-rotatable connection of the hub discs 7 to each other and / or lying between them spacers 16 on frontal locking or tooth elements, such as spur gears, corrugations or the like, so that you can work with low axial clamping forces.

In addition to Fig. 5 illustrates Fig. 10 the possibility, with opposite driving directions, ie opposite directions of rotation of the brush roller 14 with their bristles 3 erosive to engage in the respective groove 9, so that, as in Fig. 10 illustrated, chippings 11 can be detected even if this different directions of engagement along the groove are given. The different direction of rotation for the brushes 1 of the brush roller 14 is preferably used in the context of the invention in opposite, respectively the circumferential direction engaging the groove 9 corresponding feed directions 35 are used.

Another possibility in this regard is in the context of the invention when using brush 25 according to 6 and 7 given. The brushes 25 are compared to the brush 1 according to Fig. 1 to 4 wider, wherein the width 26 of a brush 25 corresponds to the distance between the centers of two adjacent grooves 9 of the workpiece to be cleaned, in particular the respective board 8.

Proceeding from this, the brush 25 is provided at the edge with longer bristles 27, and in the intermediate transition region with shorter bristles 28. As in the embodiment according to Fig. 1 to 4 engage the longer bristles 27 in the grooves 9, but only capture the adjacent to the web 10 portions 29 of the grooves 9, which over the width 26 of the brush 25 each result in a full coverage of the corresponding area of the hallway 8. Correspondingly axially subsequently clamped together brushes 25 thus enable a full-surface machining of the surfaces of grooved boards 8, wherein the axial clamping can be done in any way, for example in a in Fig. 3 illustrated way. Fig. 7 illustrates that brushes 25 can also be used across to joined planks 8. A lying between two planks 8 butt joint is indicated by dashed lines at 30.

The Fig. 11 to 13 show variants of working units 36, each constructed using a trained as a hand drill 37 drive machine 21, a brush roller 14 and a support structure 38. The latter has the function of hand drill 37 and brush roller 14 in the drive unit 36 to connect stabilizing, and this preferably in conjunction with further functions, in particular in conjunction with the improvement of the handling of the working unit 36, to allow for variations in the design of the working unit 36 and / or to act as a dust collecting or dust collecting device.

Fig. 11 shows this an embodiment of the support structure 38 as a bridge 39, which in the direction of the axis 4 of the engaged therefrom brush roller 14 to each other spaced support legs 40, 41, which are connected via a web 42. To the support legs 40, 41, the supporting support of the brush roller 14 via the clamping pin 17 at the distal end of the hand drill 37 in the support leg 40, while on the support leg 41 formed as a bridge 39 supporting structure 38 is supported on the clamping neck 43 of the hand drill 37, which in turn via its chuck, not shown, the clamping pin 17 receives at the drive end end supporting.

The bridge 39 is, as schematically illustrated in an embodiment of the invention, adjustable in the direction of the axis 4 in its span, which on the one hand facilitates the assembly and on the other hand, the use of the bridge 39 for different in their axial length brush rollers 14 allows. For this purpose, the support leg 40 is in particular integrally connected to the web 41 to a support bracket 44 which in turn in the overlapping region of the web 42 to the support leg 41 fixable, in particular fixable by bracing. It is indicated that preferably on the web 42 of the bridge 39, a handle 45 is provided. In the context of the invention, but it is also in particular, the web 42 itself in such a way that it is easy to grip as a handle, wherein expediently, the web 42 may be designed as part of the brush roller 14 at the same time. For this purpose, in particular rain gutter-like cross-sectional shapes in question, which are formed in the apex area to a longitudinally extending grip web, approximately analogous to the handle 45th

Fig. 12 shows a basic structure of Fig. 11 corresponding representation, in which case, however, the support structure 38 terminates in the direction of the hand drill 37 to be connected in a gear box 46 which receives a preferably designed as an angular gear 47 gearbox. One possible embodiment of such a transmission 47 is illustrated Fig. 12 by the formation of the protruding into the gear box 46 end of the clamping pin 17 as a gear member 48 which meshes with an angle thereto standing gear member 49. For example, the gear member 48 may be formed as a worm, in which the counter member 49, designed as a gear, in particular bevel gear, engages. The gear member 49 is rotatably connected to a shaft journal 50, which in turn can be rotatably received by the chuck of the hand tool, in particular hand drill 37, which in turn can be recorded on its clamping neck 43 in the gear box 46 fixed position and connected thereto.

Even with such an embodiment, the formation of serving as a bridge 39 part of the support structure 38 is analogous to Fig. 11 advantageous and expedient, so that reference may be made to the relevant remarks.

Fig. 13 FIG. 4 illustrates, highly schematically, a view of the processing unit 36 according to FIG Fig. 12 , wherein the bridge to the brush roller 14 cross bridge 39 of the support structure 38 is designed at least in axial sections as dust collection or dust collection 51, which may optionally in particular in the direction of the connected hand drill 37, which is not shown, may be connected to a suction device.

The dust collecting or dust collecting device is illustrated by dust pockets 52, which are then provided on the transverse to the axis 4 opposite, adjoining the web 42 side walls 53. The dust pockets 52 are formed in the schematic representation in that the side walls 53 are bent off and bent back expiring in the opposite direction, so are formed in total as U-shaped, against the web 42 open channels or as at least frontally closed boxes. Within the scope of the invention is to make such dust bags in other ways.

In particular, in the areas in which the side walls 53 are acted upon according to the direction of rotation of the brushes 1 with particles removed via their bristles 5, 6, the side walls 53 are provided with openings 54 and, for example, formed like a lattice or slotted.

Thus, the invention provides using brushes 1 or brushes 25, the possibility to achieve due to the circumferentially over the respective brush width stepped circumferential contour of their bristles cleaning and / or preparation of grooved surfaces having workpieces quickly, easily and with good surface quality, without to use expensive procedures or to use expensive and complicated tools and machines. Thus, in particular for the non-professional field, a very expedient solution has been created which, at least in terms of the quality of the result, can also be advantageously used for the professional sector.

Claims (16)

Rotating brush, in particular for handheld power tools, which is provided peripherally to its hub (2) with radially protruding bristles (3, 5, 27, 28), characterized in that the brush (1, 25) has a bristle (3, 5 ; 27, 28) has formed circumferentially and over the brush width stepped circumferential contour. Rotary brush according to claim 1, characterized in that the stepped peripheral contour of the bristles (3, 5, 27, 28) is formed in the middle transverse region of the brush (1, 25) with respect to the edge regions, or in the edge regions with respect to the central transverse region. Rotating brush according to claim 1 or 2, characterized in that the peripheral contour of the bristles (3, 5, 27, 28) to the transverse center plane of the brush (1, 25) is symmetrical. Rotary brush according to one of the preceding claims, characterized in that the bristles (3, 5, 27, 28) consist of plastic, in particular polyamide. Rotary brush according to one of the preceding claims, characterized in that the diameter of the bristles (3, 5, 27, 28) is of the order of one millimeter. Rotating brush, in particular according to one of the preceding claims, characterized in that the brushes (1) bristles (3, 5, 6) of different length, different thickness and / or different hardness and in particular that the longer and shorter bristles (5, 6) differ in thickness and hardness, and in particular the longer bristles (6) are thinner than the shorter bristles (5) are formed. Rotating brush according to one of the preceding claims, characterized in that the bristles (3, 5; 6; 27, 28) are held by axial tension over the hub (2) of the brush (1; 25), in particular radially inward to form a bristle body are connected. Rotating brush according to one of the preceding claims, characterized in that the brush (1; 25) is designed as a brush disc and that several disc-shaped brushes, in particular coaxially lined up, are clamped together to form a brush roller (14) or integrally connected to a brush roller (14). form the following peripheral contour with the contour of the brush discs. Rotary brush according to one of the preceding claims, characterized in that the disc-shaped brushes (1) connected to a brush roller are axially supported on the hub side by spacers (16), in particular such that the spacers (16) are axially elastic and the disc-shaped brushes (1 ) are adjustable in their axial distance clamping force dependent .. Rotary brush according to one of the preceding claims, characterized in that the at least one brush (1) is arranged on a shaft designed in particular as a clamping pin (17) and held torque transmitting on the shaft by a form-locking connection. Rotating brush, in particular according to one of the preceding claims, characterized in that the brush roller (14) and a support structure (38) provided for this form a working unit (36) which is provided with a drive machine (21), in particular a hand-held power tool (37). , preferably in the form of a drill, drive-connected brush roller (14) via the support structure (38) is supported to the power tool. Rotating brush according to claim 11, characterized in that the support structure (38) is connected to the hand tool (37) drivingly connected brush roller (14) on a guide collar of the power tool (37), in particular the clamping neck (43) of a hand drill, is supported. Rotary brush according to one of the preceding claims, characterized in that the supporting structure (39) is supported in a position fixed to the hand tool (37) by a shaft of the brush roller (14) which extends in extension of the output shaft of the hand tool machine. Rotary brush according to one of the preceding claims, characterized in that in the transition between the hand tool (37) and the brush roller (14) supported support structure (38) has a gear (47), in particular an angular gear, with an angle to the shaft of the brush roller (14). extending output shaft of the power tool (37) is arranged. Rotary brush according to one of claims 11 to 14, characterized in that the support structure (38) is designed as a dust-collecting device (51). Rotary brush according to one of claims 11 to 15, characterized in that the support structure (38) has a handle (45) and / or at least in partial areas as a handle (45) is formed.

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