EP3231321A1 - Circular broom and fastening device for circular broom - Google Patents

Abstract

The present invention relates to a disc brush and a fastening device for a disc brush (10), wherein the fastening means comprises a disc-shaped carrier (30) with a lower side (33), through the center of which runs an axis of rotation (1) with respect to which the carrier (30) is rotatable, wherein at one with respect to the axis of rotation (1) radially outwardly outer edge of the carrier (30) a circumferential and axially from the bottom (33) projecting side edge (36) is arranged, wherein the side edge (36) at a radially to inside directed (37) has at least one stop (46) for a torque transmitting coupling with a radial projection (14) which is arranged on a radial outer side of a plate insert (10) and wherein the side edge (36) on an axial end face (38 ) has at least one with the geometry of the projection (14) corresponding recess (40), which with respect to a circumferential direction (u) the carrier (30) offset from the at least one stop (46) is arranged.

Description

The present invention relates to a fastening device for a plate eating, in particular for the interchangeable arrangement of a plate plate to a support of a sweeping or cleaning machine, wherein the carrier is typically mounted by means of a drive rotatably mounted on a sweeping or cleaning machine.

The use of so-called plate brushes is well known for the cleaning of paved areas. Common sweeping and cleaning machines or devices have a motor driven and correspondingly rotatable head, i. a drive train on which a support for the disc brush is arranged rotationally fixed. Common disc brushes have a disk-shaped plate body on which a plurality of bristles are arranged, which faces away from the plate body with its free end, typically approximately axially relative to the axis of rotation of the plate body, or axially and radially outwardly inclined at a predetermined angle are.

For the torque-transmitting attachment of the plate plate with the carrier of sweeper or cleaning machine, it is customary to provide each other on the turntable side and carrier side corresponding bolts and through holes, so that the plate brush by means of several, extending in the axial direction of bolts or pins is detachably arranged on the carrier. Since the disc broom is a wearing part, a regular replacement of the same on the carrier is required.

For a particularly user-friendly and easy handling and replacement of plate brooms, it is desirable, as intuitive and easy as possible To provide handling quick change system for disc brush, which provides a safe and durable torque-transmitting connection between disc brush and carrier in addition to a simple and rapid replacement. In addition, such disc brushes should be as inexpensive and easy to produce.

From the DE 91 14 382 U1 already a fastening device between disc brush and rotatable drive head of a street sweeper is known. For attachment of a hub of the plate body of the plate bit a bayonet lock with several distributed over the circumference of plate body and drive head arranged bayonet members is available for this purpose on the power unit. Further, at least one clamping member for axially compressing the plate body and drive head is present and the hub of the plate body is formed as a spring washer.

Between adjacent bayonet members, a clamping member is provided, which is designed as a clamping nut with a conical clamping surface. An elongated hole of each bayonet member further has a conical seat for the respective clamping nut. To open the bayonet lock, it is always necessary to solve a clamping nut by means of a suitable tool.

In contrast, one aspect of the present invention has the object to provide an improved attachment device for a plate brush on the drive head or carrier sweeping or cleaning machine, which allows a quick and easy and intuitive replacement of a plate note. The replacement of the plate plate should be done without the aid of separate assembly or disassembly tools, ie tool-free. Furthermore, it is the objective to use novel, particularly cost-effective and easy-to-process materials for the production of a plate beech. This should reduce manufacturing costs.

Invention and advantageous embodiments

This object is achieved with a fastening device according to the independent claim 1, further comprising a disc brush according to claim 12. Advantageous embodiments are the subject of each dependent claims.

According to a first aspect, the invention relates to a fastening device for a plate brush, in particular for a tool-free assembly and disassembly of a plate plate on a disk-shaped carrier, which is typically rotatably mounted on a sweeping or cleaning machine.

The fastening device has a disk-shaped carrier, which is typically in operative connection with a drive of a sweeping or cleaning machine, for example a street sweeper. The disc-shaped carrier has an underside, through the center of which runs an axis of rotation with respect to which the carrier can be rotatably mounted, for example, on a street sweeper. At one, with respect to the axis of rotation radially outer outer edge of the carrier, a circumferential and axially projecting from the bottom side edge is formed or arranged. The side edge has on a radially inwardly directed inside at least one stop for a torque-transmitting coupling with a radial projection. The radial projection is provided on a radial outer side of a plate plate, which can be fastened to the underside of the carrier.

The side edge of the carrier also faces away from the underside of the carrier, i. a in the operating position of the plate plate facing a surface to be cleaned facing axial end face with at least one recess which is adapted in terms of their geometry to at least one radial projection of the plate plate and configured accordingly corresponding thereto. That recess in the axial end face of the side edge of the carrier is, with respect to a circumferential direction (u) of the carrier, offset from the at least one stop.

The side edge is typically formed integrally with the disc-shaped carrier. He is sometimes an integral part of a carrier body. For the formation of a bounding of the bottom and the side edge recording for The plate body of a plate plate can be provided that the disc-shaped carrier is milled on its underside.

For the mounting of the plate plate on the fastening device, thus on the support is provided that the clear width or the inner diameter of the side edge at the bottom of the carrier is about as large as the outer diameter of the correspondingly designed Tellererbesens. The clear width or inner diameter of the circumferential side edge of the carrier is typically slightly smaller than an outer circumference of the plate insert in the region of its radial projection. In this way, the circular brush can be used axially only in a preferred direction or in some selected preferred directions in a recording of the carrier formed by the underside and side edge.

For this purpose, the at least one radial projection of the plate insert must be aligned axially in alignment with the recess of the axial end face of the side edge of the carrier that is configured correspondingly. After the at least one projection of the plate plate is guided axially through the recess on the side edge of the carrier, the plate brush can be rotated relative to the carrier until the radial projection in the circumferential direction or tangentially on the stop provided for this purpose on the inside of the side edge of the carrier to the plant arrives. As soon as the radial projection of the plate plate comes to rest on the stop, which likewise extends in the radial direction, at least one unidirectional torque-transmitting coupling is formed between the carrier and the plate brush, without requiring the use of any fastening tools for this purpose.

In this way, the fastening device allows a particularly fast, smooth, intuitive learning and tool-free replacement of a plate plate on the support of the fastening device.

According to a further embodiment, a plurality of circumferentially offset from each other arranged recesses and stops are arranged on the inside of the side edge. Recesses and stops are arranged in pairs. In each case a recess is assigned in each case a stop. The distance in the circumferential direction between the recess and an associated stop of a recess-stop-pair is always identical.

It is provided in particular that at least two recesses and stops are arranged on the inside of the side edge. Preferably, at least three recesses arranged uniformly or equidistantly over the inner circumference and correspondingly equidistant and distributed stops are provided. It can also be provided far more than just two or three recesses and stops. It is conceivable to provide, for example, five, six, seven, eight, nine, ten or even twelve and more equidistantly distributed over the inner circumference of the side edge arranged recesses and associated stops. The plate broom to be fastened to the underside of the carrier can in this case have a corresponding number of radial projections. In principle, however, it is also conceivable that the disc brush has fewer projections than the carrier recesses.

By means of several distributed over the circumference of the side edge arranged stops and hereby corresponding to the disc brush arranged radial projections can be distributed from the carrier to the disc brush torque to be equally distributed to a plurality of pairs of stops and projections. Mechanical point loads between adjoining radial projections and correspondingly designed attacks on the side edge of the carrier can be reduced in this way.

Characterized that the at least one or that advantageously a plurality of stops are arranged on an inner side of a radially outer side edge of the carrier, a torque transmission between carriers and disc broom takes place radially outside the disc brush. Compared to conventional fastening concepts in which a torque transmission between the carrier and plate brush comparatively close to the axis, a force acting in the circumferential direction on the radial projection of the plate plate force can be significantly reduced.

The provision of mutually corresponding stops and projections on the outside of the plate body or on the inside on an outer side edge of a carrier enables a reduction of the forces to be transmitted between the carrier and the plate brush while maintaining the same torque. The greater the distance to the axis of rotation, the lower the force to be applied in the tangential direction to achieve a consistently high torque. In that regard, can be reduced by the radially outer and interlocking torque-transmitting structures, stop and radial projection requirements for a geared in the tangential direction power transmission. This allows the use of novel materials for the plate brush as well as for the wearer. Novel materials can be characterized in particular by lower production costs and by a lower weight. For the carrier, in particular light metals, such as aluminum, but also high-strength plastics come into question. For the plate brush, especially for the plate body also plastics, metals or wood can also be provided.

According to a further embodiment, the at least one recess extends over a substantially L-shaped groove on the inside of the side edge along to the stop. In other words, the stopper constitutes a radially inwardly projecting boundary at a longitudinal end of the groove. The longitudinal extent of the groove substantially coincides with the circumferential direction of the side edge. A radial projection on the outside of a plate body of a plate plate is so far axially inserted through the recess into the groove. Then, the radial projection in the circumferential or tangential direction along the groove can be guided to the stop. The L-shaped groove represents insofar a positive guidance for the radial projection on the circular brush.

As soon as the at least one radial projection of the plate plate is passed through the recess in the end face of the side edge, a corresponding slipping of the radial projection in the groove can be achieved by a rotation of the plate plate with respect to the said axis of rotation and relative to the carrier.

Advantageously, a plurality of circumferentially spaced-apart radial projections of the plate plate at the same time pass through hereby corresponding recesses on the axial end face of the side edge of the carrier. Each of the recesses extends over a substantially L-shaped groove to a corresponding end stop. As a result, a multiple but always identical or similar fixation and support of the Tellerbesens is achieved on the carrier.

According to a further embodiment, the groove is limited in the axial direction on the one hand by the underside of the carrier and on the other hand by a radially inwardly projecting flange portion of the side edge. The inwardly projecting flange portion coincides with the end face of the side edge. In other words, the L-shaped groove in the region of the flange portion can also form an undercut into which the radial projections provided radially on the outside of the plate body of the plate insert engage. By means of the radially inwardly projecting flange portion or by means of the groove designed as an undercut, an axial securing of the at least one projection, preferably a plurality of projections, on the radial outer side of the respective plate insert is furthermore achieved.

The radial extent of the flange portion typically corresponds to the radial extent of the at least one radial projection on the outer edge of the plate insert. In this way, the largest possible overlap area is formed in the radial direction, which ensures a secure and durable fixation in the axial direction.

By means of the L-shaped groove and the groove in the axial direction limiting flange on the side edge of the carrier is the at least one radial projection, preferably the plurality of radial projections on the outside of a Tellerbesens a multiple meaning and function. On the one hand takes place via the radially projecting from the outer periphery of the plate plate projections a torque transmitting coupling with a provided on the inside of the side edge stop. On the other hand takes place via such radial projections at the same time also an axial securing and attachment of the Tellerbesens on the carrier.

According to a further embodiment, it is provided that the axial width of the groove corresponds to the axial thickness of the radial projection of the plate plate. The groove may also be slightly larger in the axial direction than the axial thickness of the radial projections of the Tellerbessens. An at least slightly compared to the axial thickness widened groove allows a particularly simple and component tolerances compensating mounting of the plate plate on the carrier.

However, it is also conceivable that the axial thickness of the radial projection largely coincides exactly with the axial width of the groove provided on the carrier. In this way, a particularly firm and backlash-free assembly of the plate plate on the carrier can be brought about. It is also conceivable that the groove, starting from the recess towards the stop has an axial taper. The groove may be circumferentially axially tapered so that the axial width of the groove at the stop or in the vicinity of the stop is less than adjacent the recess in the end face of the side edge. A continuously tapering towards the stop, approximately conically tapered axial width of the groove can contribute to a clamping action between disc brush and carrier. In this way, a particularly simple assembly paired with a particularly firm and play-free locking of the plate insert on the carrier can be achieved.

According to a further embodiment, the flange portion is viewed on the side edge of the carrier in the circumferential direction (u), limited by at least one stop and opposite to the stop of the recess. The recess marks, as it were, one end of the flange portion in the circumferential direction, while the stop forms an opposite end of the flange portion in the circumferential direction. The stop and the flange portion may have the same radial extent. In other words, the L-shaped groove can be understood as a recess or cutout on the inside of the side edge of the carrier.

In the region of the L-shaped groove wall thickness of the side edge is reduced according to the radial extent of the groove. In the region of the groove axially delimiting flange portion as well as in the region of the stop, the side edge of the carrier has an original radial material thickness.

According to a further embodiment, the fastening device has at least one locking element with at least one locking pin.

The locking pin can cooperate in particular with at least one radial projection of the plate insert as soon as the plate brush comes to rest with its projection on the stop provided for this purpose on the inside of the side edge of the carrier. The locking pin is arranged in particular axially between a release position and a locking position movable on the carrier. In its locking position, it can at least hold a radial projection of the plate plate with the corresponding thereto stop on the inside of the side edge of the carrier in operative connection or in engagement. In this way it can be ensured that the disc brush is also fixed for different directions of rotation of the wearer on the carrier.

According to a further embodiment, the locking pin extends through the carrier into the groove. It is provided in particular that the carrier axially adjacent to the groove has a through hole for the locking pin. This can be pushed through, for example, through the corresponding passage opening. The passage opening provided for the locking pin can extend in particular in the axial direction through the disk-shaped carrier. The locking pin can finally project so far from the underside of the carrier body that it projects into the groove.

According to a development, it is further provided that the locking element is arranged on an upper side of the carrier. The locking pin of the locking element may in this case extend through a through opening through the carrier, whose lower end opens into the groove of the side edge of the carrier. The arrangement of the locking element on the top is particularly user-friendly. Since the locking element is also near the side edge or even covering the side edge and thus radially outward on the carrier, it is particularly easily accessible to the end user. For the replacement of a plate baking the carrier can remain on a sweeping or cleaning machine.

According to a further embodiment, the locking pin of the locking element relative to the circumferential direction (u) at a distance (d) to the at least one stop on the carrier can be fixed. The distance (d) is at least as large as the extent of the at least one projection of the plate plate in the circumferential direction. The distance (d) between the stop and the locking pin is selected such that the at least one radial projection of the plate bit can be placed in the circumferential direction between them. In this way, the mutual abutment of radial projection and abutment can provide torque transmission in one direction of rotation, typically along the main rotating or cleaning direction of the plate insert, while the interlocking engagement of the locking pin and the radial projection of the plate insert provides a torque transmitting coupling in the opposite direction of rotation forms. This coupling can primarily serve to secure and fix the plate plate on the carrier, in particular when the carrier is in a non-driven rest position.

A fixation of the locking pin on the carrier with respect to a radial direction and a circumferential direction can be provided by merely inserting the locking pin in an axial passage opening of the carrier provided for this purpose. An axial securing of the locking pin on the carrier can be achieved in different ways. Thus, the locking pin may be configured, for example in the form of a spring-loaded locking bolt or as a locking pin.

According to a further development of the fastening device, a centering pin for a radially centric passage opening of the plate insert is provided radially centrally on the underside of the carrier. The centering pin may have an axial extent corresponding to the axial extent of the side edge at the bottom of the carrier. But it is also conceivable that the centering pin has a greater axial extent than the side edge of the carrier. The centering pin may have a cylindrical or conical basic geometry. A provided with a conical geometry centering pin can therefore act as a centering cone. By means of a geometry corresponding to the centering pin passage opening radially centered in the plate body of the plate plate assembly of the plate plate on the carrier can be further simplified. The introduction of at least one or more radial projections in corresponding recesses in the side edge of the carrier can be simplified and facilitated by means provided in the disc brush and pushed onto the centering through hole.

The centering pin and the carrier of the fastening device can be designed in several parts. It is particularly conceivable that the carrier itself has a passage opening, which is equally penetrated by the centering pin. But it is also conceivable that the centering pin and the disk-shaped carrier are designed in one piece.

According to a further aspect, the invention further relates to a disc brush for interchangeable arrangement on a fastening device described above. The disc brush has a disk-shaped plate body for a torque-transmitting attachment to the support of the fastening device. At least some bristles or bristle bundles are arranged on the plate body, by means of which a cleaning effect can be achieved on such surfaces, over which the plate brush is guided in a rotating or rotating manner. The plate body of the plate plate has a circular outer periphery, on which at least one radially outwardly projecting projection is arranged. That projection can be guided through a recess in an axial end face of a side edge of the carrier and can be tangentially brought into contact with at least one stop arranged on a radial inner side of the side edge of the carrier.

In other words, the disc brush is formed with its disc-shaped plate body and with the at least one radially projecting from the outer periphery of the plate body radial projection corresponding to the geometry and the shaping of the inside of the side edge of the support of the fastening device. Typically, the plate body has a plurality of circumferentially distributed radial projections on its outer periphery, which at the same time passable through corresponding recesses of the side edge of the carrier and in the groove adjacent thereto on the inside of the side edge the carrier can be guided along until all the radial projections cooperate with corresponding stops on the inside of the side edge of the carrier, so as to form an at least unidirectional multiple torque-transmitting coupling between the carrier and the plate body.

According to a further embodiment, it is provided that a plurality of circumferentially arranged adjacent projections on the plate body are arranged distributed over the outer circumference, based on a circular geometry of the plate body at least 30 °, at least 40 °, at least 45 ° or at least 60 °. Intermediate sections of the outer periphery of the plate body are formed without projections. They have a circular segment-like contour. In particular, it is provided that the sum of all the protrusions on the outer circumference of the plate body make up at most 30% of the total outer circumference, at most 20% of the entire outer circumference or at most 15% of the entire outer circumference of the plate body.

It is provided in particular that the axial securing and the torque transmission of the plate body and carrier takes place via a few radial projections of the plate body and corresponding undercut structures in the side edge of the carrier. Preferably, six to ten radial projections are provided on the outer periphery of the plate body.

The individual radial projections may have a rounded, thus convex contour. The radius of curvature of individual radial projections may be less than 30% of the radius of the plate body. Advantageously, the radius of curvature of individual radial projections on the outer circumference of the plate body is less than 20% of the radius of the plate body. The geometry and contour of the provided on the side edge of the carrier recesses or stops is typically adapted to the shape of the radial projections of the plate body. Thus, the recesses in the end face of the side edge of the carrier may have an approximately curved or concave shape. The provided on the inside of the side edge stops may equally have a curved, convex and / or concave curved shape in the plane formed by the radial direction and the circumferential direction.

According to a further embodiment of the plate plate, the plate body radially centered on a passage opening for a radially centrally provided on the underside of the carrier centering. The through-opening of the plate body, in particular its opening boundary, can be beveled, for example, in order to obtain a self-centering arrangement or alignment of the plate body during fastening to the underside of the carrier.

According to a further embodiment it is further provided that the carrier is made of wood, plastic, metal or a Kunststoffmetallverbund. It should be noted here in particular that all provided for the axial fixation of the plate body and the torque transmitting coupling plate body and support plate body side geometric structures sämtlichst radially outwardly provided on the plate body and configured integrally with the plate body or are integral part of the respective plate body.

Both for the axial fixation and for the torque transmission no separate fasteners are provided on the disc brush. The basic structure of the plate plate can be radically simplified in this way, in particular by the radially outer torque-transmitting coupling of plate brush and carrier. Manufacturing and manufacturing costs as well as replacement costs for the consumable disc brush can be significantly reduced in this way.

It should be noted at this point that all described in relation to the fastening device features and advantages, in particular with respect to an arrangement of the plate plate on the support of the fastening device are related. In that regard, all the features described for fastening device all also apply equally to the plate brushes; and vice versa.

Brief description of the figures

Fig. 1

eine perspektivische Explosionsdarstellung der Befestigungseinrichtung,

Fig. 2

eine perspektivische Darstellung des Trägers der Befestigungseinrichtung von schräg unten betrachtet zusammen mit einem Tellerkörper eines Tellerbesens ohne hieran angeordnete Borsten,

Fig. 3

die Unterseite des Trägers der Befestigungseinrichtung in Draufsicht,

Fig. 4

eine Darstellung gemäß Fig. 3 jedoch mit einem in die Aufnahme des Trägers eingesetzten Tellerkörpers in einem unverriegelten Zustand,

Fig. 5

eine Darstellung gemäß Fig. 4 jedoch mit dem Tellerkörper in einer Verschlussstellung,

Fig. 6

einen horizontalen Querschnitt A-A durch einen an einem Anschlag tangential anliegenden radialen Vorsprung und

Fig. 7

einen Querschnitt B-B durch den Seitenrand des Trägers der Befestigungseinrichtung.

Other objects, features and advantageous embodiments of the fastening device and the associated Tellerbesens be in the following description of an embodiment with reference to the drawings. Hereby show:

Fig. 1

an exploded perspective view of the fastening device,

Fig. 2

a perspective view of the carrier of the fastening device viewed obliquely from below together with a plate body of a plate Beerbesens without arranged thereon bristles,

Fig. 3

the underside of the carrier of the fastening device in plan view,

Fig. 4

a representation according to Fig. 3 however, with a disc body inserted into the receptacle of the carrier in an unlatched condition,

Fig. 5

a representation according to Fig. 4 but with the plate body in a closed position,

Fig. 6

a horizontal cross section AA through a tangential to a stop radial projection and

Fig. 7

a cross section BB through the side edge of the carrier of the fastening device.

Detailed description

In the Fig. 1 fastening device 5 shown has a carrier 30 to be arranged on the machine side. The carrier 30 is configured disk-shaped. It has a carrier body 32 with one of the surface to be machined facing bottom 33 and with an opposite top 35. The bottom 33 and the top 35 are substantially planar or just designed. The carrier body 32, thus the carrier 30 has a substantially circular or circular geometry.

Radially centered, the carrier 30 is rotatably mounted with respect to a rotation axis 1 on the sweeping or cleaning machine not shown here. The disc-shaped carrier 30 has on its underside 33 a receptacle 34 for a plate brush 10, as shown in the illustration Fig. 2 evident. The receptacle 34 is in this case formed by the substantially flat underside 33 of the carrier body 32 and by a circumferential and closed side edge 36 of the carrier 30.

The side edge 36 extends in the axial direction (z), that is, parallel to the longitudinal extent of the axis of rotation 1 from the bottom 33 of the carrier body 32 down. The side edge 36 is also located on a radially outer outer edge 31 of the carrier 30. In other words, the side edge 36 at the same time forms a radial outer edge 31 of the support 30 and the support body 32. Radially inside, that is on an inner side 37 of the side edge 36 points the support 30 has at least one stop 46, which can be coupled with a corresponding radial projection 14 on the outer edge 15 of a disk-shaped disk body 12 of the disk socket 10 in a torque-transmitting manner.

In a closing or final assembly position, as exemplified in the FIGS. 5 and 6 is shown, an edge 17 of the radial projection 14 tangentially with the stop 46, that is in the circumferential direction (u) of the carrier 30 to the plant. In this way, an in Fig. 6 For example, counterclockwise directed rotational movement of the carrier 30 are transmitted directly to a corresponding rotational movement of the plate body 12 and the plate recess 10.

As in Fig. 2 can be seen, the side edge 36 of the support body 32 in the axial direction of the bottom 33 of the planar support body 32 facing away from an end face 38 is limited. The end face 38 has at least one recess 40 which, with respect to the circumferential direction (u) of the carrier 30, is arranged offset relative to the at least one stop 46. In the region of the recess 40, the side edge 36 has, so to speak, a recess on its inner side 37. The recess 40 extends axially through the end face 38. It extends over a substantially L-shaped groove along the inner side 37 of the side edge 36 to the stop 46th

In other words, the inner side 37 has an L-shaped recess in the side edge 36. A short leg of the L-shaped recess extends in the radial direction (r). A long leg of the L-shaped recess extends substantially in the circumferential direction (u), which is also referred to as a tangential direction.

As based on the FIGS. 2 and 3 illustrates, the side edge 36 of the carrier 30 a plurality of circumferentially distributed recesses 40 along with associated stops 46. Due to the nature of the presentation are in Fig. 3 only the recesses 40 are shown.

The recess 40 at the same time forms an L-shaped groove 42 on the inner side 37 of the peripheral side edge 36. The L-shaped groove is bounded axially upwards by the substantially flat underside 33 of the carrier body 32. Downwardly in the axial direction, the groove 42 is bounded by a radially inwardly projecting web or flange portion 44 of the side edge 36. In other words, the groove 42 forms an undercut on the radially inwardly directed inside 37 of the side edge 36. That undercut is used for a positive fastening of the plate plate thus fixing the radially outwardly projecting radial projections 14 of the plate body 12th

As in Fig. 3 The inner radius r1 corresponds approximately to the radius R1 of the disc-shaped plate body 12 in the region of a circular segment section 13, which is located between the two circumferentially adjacent radially disposed projections 14 is located. A radius R2 of the disk body 12 in the region of a radial projection 14 is therefore greater than the radius R1. The radius R2 corresponds essentially to the radius r2. Consequently, the radius R2 is small and smaller by a predetermined tolerance than the radius r2. The same applies to the radii R1 and R1. The radius R1 is preferably also smaller by a predetermined tolerance than the radius r1.

The radius R2 is in any case greater than the radius r1. Such geometries require that the plate body 12 is inserted axially in one or in one of several conceivable orientations with respect to the axis of rotation 1 in the receptacle 34 of the carrier 30 from below. For this purpose, all radial projections 14 are aligned axially aligned with hereby corresponding recesses 40 on the side edge 36 of the carrier 30. Then the plate body 12, thus the entire disc brush 10 axially inserted into the receptacle 34, wherein the radial projections 14 are axially passed through the corresponding recesses 40 so that the bristles 16 facing the lower end of the radial projections 14 above the recesses 40th adjacent flange portions 44 comes to rest.

Then, a rotation of the plate body 12 relative to the carrier 30 with respect to the axis of rotation 1 is provided. In the present embodiment, the plate body 12 is viewed from below counterclockwise to rotate relative to the carrier 30. By that rotational movement, the radial projections 14 are guided in the groove 42 until they come to the groove 42 in the circumferential direction (u) limiting stops 46 to the plant, as shown in FIG Fig. 6 is shown schematically. Upon reaching that final assembly position, an at least unidirectional torque transmission between the carrier 30 and plate body 12 is provided. Viewed from below on the fastening device 5, a rotation of the carrier 30 in a clockwise direction leads to a corresponding rotational movement of the plate body 12. In Fig. 6 is a cross-sectional view from above of the arrangement of plate brush 10 and carrier 30 is shown. The torque coupling is implemented counterclockwise in this illustration.

For fastening and locking of the plate element 10 on the carrier 30, a locking element 50 can furthermore be provided. The locking element 50 may be in the FIGS. 5 and 6 schematically illustrated locking pin 52 which passes through an axial passage opening in the carrier body 32. The locking pin 52 may protrude from above and thus axially into the groove 42 of the side edge 36 to clamp at least one radial projection 14 of the plate body 12 in the circumferential direction between the locking pin 52 and a stop 46. The locking pin 52 is, with respect to the circumferential direction (u), arranged at a predetermined distance d to the stop 46, wherein the distance d corresponds to the extent of the radial projection 14 in the circumferential direction (u).

The locking element 50 may be formed, for example, as a plastic injection molded component. It may, for example, clip-end or otherwise be positively attachable to the top 35 of the carrier 30. It is in this case in particular conceivable that the locking element 50 is designed in several parts, so that a movable part coupled to the locking pin 52 is, for example, pivotally or displaceably engaged with a fixed part connected to the carrier 30. In this way, a captive arrangement of the locking pin 52 on the carrier 30 is realized. As an alternative to the representation shown here, the locking element 50 may also be designed in the form of a locking pin, which is connected inseparably to the carrier 30 by means of a chain or a film hinge.

The carrier 30 and the side edge 36 are advantageously formed in one piece. The carrier 30 may be made of aluminum or of a plastic, for example of polypropylene, optionally glass fiber reinforced polypropylene or polyamide, for example. It is particularly conceivable that the receptacle 34 is milled out on the underside 33 of the carrier 30. The carrier 30 may be made in an education in plastic as injection molded component.

For the connection to a drive or to a drive head of a sweeping or cleaning machine, the carrier 30 may be provided with a hub 60. As in Fig. 1 shown, the hub 60 has a hollow shaft 61 for receiving a drive shaft, which is not shown here. The shaft 61 has, as in Fig. 3 shown, a radial and elongated groove 68 for forming a torque transmitting connection with a drive shaft. The shaft 61 is connected to a radially widened flange 63, which can be screwed onto the upper side 35 of the carrier body 32. For this purpose, the flange 63 and the support body 32 a plurality of mutually corresponding and mutually aligned in the mounting position mounting holes 64, 66, through which a fastening means, for example in the form of a screw bolt 70, can be passed.

It is also conceivable that the hub 60 is arranged on the underside 33 of the carrier body 32, so that only the shaft 61 of the hub 60 projects from below axially through a central passage opening 39 of the carrier body 32 therethrough. A screw with the carrier body can be done here from below accordingly.

At the bottom of the hub 60 is also an in Fig. 2 shown centering pin 54 is provided, which in the final assembly position of the plate insert 10 on the carrier 30 passes through a central passage opening 18 of the plate body 12 or at least comes to rest here. The centering pin 54 has a conical, downwardly tapering outer contour, which facilitates centering or centric arrangement of the plate insert 10 on the underside 33 of the carrier 30.

Notwithstanding the in Fig. 2 embodiment shown is also conceivable that the centering pin 54 and / or the hub 60 is also formed directly and integrally on the carrier body 32 or are. Instead of a multi-part design of carrier body 32 and hub 60, the hub 60 and the carrier body can also be configured in one piece or in one piece, for example in the form of a plastic injection-molded component. The axial extent of the centering pin 54 may be greater than the axial extent of the side edge 36. In this way, the plate body 12 comes in the course of assembly first with an inner edge 20 of a central through hole 18 with the centering pin 54 in investment position before the radial projections 14 on the outer edge 15 of the plate body 12 reach into the region of the recesses 40. The inner edge 20 may also be conical according to the cone of the centering pin 54 or at least provided with a chamfer.

The present fastening device 5 is characterized in particular by the fact that there are no separate attachment or coupling means to be provided on the body side. An axial securing of the plate insert 10 on the carrier 30 and a torque-transmitting coupling between the carrier 30 and plate brush 10 can be done solely by the shape and contour of the plate body 12, in particular by its radial projections 14. The use of screws or the like fasteners, which always the aid of tools for require a replacement of the Tellerbesens, is thus completely unnecessary. The radial projections 14 on the otherwise circular outer edge 15 of the plate body 12 are characterized by a convex or rounded shape.

The radial projections 14 designed in the manner of individual cams can thus have a comparatively large contact surface with the side edge 36 of the carrier 30 and by means of a corresponding rounded, curved or concavely curved shape of the stops 46 corresponding therewith. As in Fig. 6 indicated, the contact surface 56 extends between a radial projection 14 and a stop 46 corresponding thereto at a predetermined angle w to the radial direction (r) of support body 32 or plate body 12. The angle w can be between 15 ° and 75 °, preferably between 30 ° and 60 °. Such an angular range further achieves a further radial centering of the plate body 12 with respect to the carrier 30. By means of a contact surface 56 which extends at an angle to the radial direction (r) and at an angle to the tangential direction, the disc brush 10 always also experiences a radially inwardly directed radially centering force component during rotation of the carrier 30.

In cross-section of Fig. 7 through a groove 42 in the side edge 36 of the carrier 30, the undercut formed by the groove 42 for receiving and locking the radial projections 14 of the plate body 12 is clearly visible. The groove 42 is formed on the radially inwardly directed inside 37 of the side edge 36. It is bounded in the axial direction upward by the underside 33 of the substantially planar carrier body 32. Axially downward, the groove 42 is bounded by the radially inwardly projecting flange portion 44, which extends from the side edge 36 radially inwardly.

LIST OF REFERENCE NUMBERS

1

axis of rotation

5

fastening device

10

Flat whisk

12

dial body

13

Circular segment section

14

radial projection

15

outer edge

16

bristles

17

flank

18

Through opening

20

inner edge

30

carrier

31

outer edge

32

support body

33

bottom

34

admission

35

top

36

margin

37

inside

38

face

39

Through opening

40

recess

42

groove

44

flange

46

attack

50

locking element

52

locking pin

54

spigot

56

contact area

60

hub

61

shaft

63

flange

64

mounting hole

66

mounting hole

68

groove

70

bolts

Claims (15)

Fastening device for a disc brush (10), wherein the fastening means comprises a disc-shaped carrier (30) having a bottom (33) through the center of which a rotation axis (1) extends, with respect to which the carrier (30) is rotatable, wherein on a relative to the rotational axis (1) radially outer edge of the carrier (30) a circumferential and axially from the bottom (33) projecting side edge (36) is arranged, wherein the side edge (36) at a radially inwardly directed inside (37) at least one Stop (46) for a torque transmitting coupling with a radial projection (14) which is arranged on a radial outer side of a plate insert (10) and wherein the side edge (36) on an axial end face (38) at least one with the geometry of the projection (14) corresponding recess (40) which, relative to a circumferential direction (u) of the carrier (30) offset from the at least one stop (46) is arranged. Fastening device according to claim 1, wherein on the inside (37) of the side edge (36) a plurality of circumferentially (u) offset from one another arranged recesses (40) and stops (46) are arranged. Fastening device according to one of the preceding claims, wherein the at least one recess (40) extends over a substantially L-shaped groove (42) on the inside (37) of the side edge (36) along to the stop (46). Fastening device according to claim 3, wherein the groove (42) in the axial direction on the one hand from the underside (33) of the carrier (30) and on the other hand by a radially inwardly projecting flange portion (44) is limited, which with the end face (38) of the side edge ( 36) coincides. Fastening device according to claim 3 or 4, wherein the axial width of the groove (42) corresponds to the axial thickness of the radial projection (14) of the pan plate (10). Fastening device according to claim 4 or 5, wherein the flange portion (44) in the circumferential direction (u) viewed from the at least one stop (46) and opposite to the stop (46) of the recess (40) is limited. Fastening device according to one of the preceding claims, further comprising at least one locking element (50) which has at least one locking pin (52). The fastener of claims 3 and 7, wherein the lock pin (52) extends through the bracket (30) into the groove (42). Fastening device according to claim 7 or 8, wherein the locking element (50) on an upper side (35) of the carrier (30) is arranged. Fastening device according to one of the preceding claims 7 to 9, wherein the locking pin (52) with respect to the circumferential direction (u) at a distance (d) to at least one stop (46) on the carrier (30) is fixable, wherein the distance (d) is at least as large as the extent of the at least one projection (14) of the plate plate (10) in the circumferential direction (u). Fastening device according to one of the preceding claims, wherein radially centered on the underside (33) of the carrier (30) a centering pin (54) for a radially central passage opening (18) of the plate insert (10) is provided. A circular brush for interchangeable arrangement on a fastening device according to one of the preceding claims, with a disc-shaped plate body (12) for a torque-transmitting attachment to the carrier (30), wherein the plate body (12) has a circular outer periphery (15) on which at least one radially after externally projecting projection (14) is arranged, which by a recess (40) of a axial end face (38) of a side edge (36) of the carrier (30) can be guided and with at least one on a radial inner side of the side edge (36) of the carrier (30) arranged stop (46) tangentially to the plant can be brought. Disc brush according to claim 12, wherein on the plate body (12) a plurality of circumferentially distributed over the outer circumference (15) arranged radial projections (14) are arranged, wherein a distance of adjacent circumferentially arranged projections (14) based on a circular geometry of the plate body (12) at least 30 °, at least 40 °, at least 45 ° or at least 60 °. Disc brush according to claim 12 or 13, wherein the plate body (12) radially centrally has a passage opening (18) for a radially centrally on the underside (33) of the carrier (30) provided centering pin (54). Disc brush according to one of the preceding claims 12 to 14, wherein the plate body (30) is made of wood, plastic, metal or a plastic-metal composite.

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