ES2529996T3 - Coupling device comprising a brush disk and a flange - Google Patents

Abstract

Coupling device of a machine for cleaning floors comprising a brush disk (12, 46) and a flange (10, 44), where the brush disk (10, 46) has coupling sections (18), where the flange (10, 44) has clamping sections (14) and insert recesses (20), where the coupling sections (18) for coupling the brush disk (12, 46) to the flange (10, 44), can be introduced in an axially inserted position in the insertion recesses (20) of the flange side, and by turning the brush disc (12, 46) they are engaged from behind to the clamping sections (14) of the flange side, when reaching a fixing position, characterized in that at least one coupling section (18) that is hooked from behind in the fixing position, has a guide section (22, 40), which when rotating the brush disc ( 12, 46) to the fixing position can be engaged in such a way with an opposite section (28, 42) that is provided in the clamping section (14) of the flange side, which in the fixing position is also hooked from behind, which produces a centered alignment of the brush disc (12 , 46) with respect to the flange (10, 44) in the fixing position.

Description

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

E12701860

06-02-2015

DESCRIPTION

Coupling device comprising a brush disk and a flange

The invention relates to a coupling device of a machine for cleaning floors for the detachable attachment of a brush disk to a flange.

It is known from the state of the art to provide brush discs with coupling sections that are axially inserted in insertion recesses in an introduction position, for coupling the brush disc on the flange of the machine side, and which by turning of the brush disc they are hooked from behind to flange side clamping sections when reaching a fixing position. The brush disk is consequently placed first as a bayonet in the axial direction and then secured by turning it.

These brush discs, or couplings, are already known, for example, from DE 195 05 344 C1, DE 82 24 041 U1, DE 93 02 184 U1 or US 3,600,735.

From DE 44 34 520 A1 a brush disc is known, in which mushroom pins are provided, which are used for bayonet type fixing. To do this, the mushroom type pins are introduced axially in central, widened areas, of grooves formed on the flange side, and then rotated, so that the pins are carried by means of connection zones to narrower groove parts. The mushroom-shaped heads of the pins, which form the coupling sections, are then hooked from behind to the flange areas that are laterally adjacent to the narrower groove portions. In addition, the pins are held in position by means of spring.

Other brush discs or couplings are known, for example from US 2 541 526 A, DE 42 15 802 A1, US 5 645 365 A and US 4 391 548 A. In the case of these brush discs or couplings, they provide coupling sections, which are hooked from behind to flange side clamping sections for coupling the brush disc to a flange on the machine side.

US 5 645 365 discloses a coupling device of a floor cleaning machine according to the preamble of claim 1.

Since the coupling sections on the side of the brush disc on one side, and the clamping sections on the side of the flange on the other, are subject to certain manufacturing tolerances, it has been seen in practice that the brush disk it is not always oriented in a preferred position in the fixing position, particularly concentric with respect to the axis of rotation of the flange of the machine side. Because of this, annoying noises may occur, as well as a deterioration of the brush disk.

The present invention is based on the task of providing a coupling device, which is safe in operation, and yet a coupling disk can be arranged simply on a flange on the machine side.

This task is solved with a coupling device with the characteristics of claim 1. As a consequence, the coupling sections on the side of the disc to the clamping sections of the disk are not only hooked behind, as is known from the prior art. side of the flange, but the coupling sections additionally have guide sections that engage with opposite sections of the flange side, so that a better orientation of the brush disc with respect to the flange can be achieved, in a particularly axial direction and / or radial in the fixation position. Particularly a centering of the brush disc with respect to the flange is achieved, which leads to improved gait stability. Depending on the configuration of the brush disk according to the invention, actuating forces can be transmitted through the clamping section on one hand and particularly its guide section, and on the other hand the opposite section, not only in axial direction, but also in radial direction, and this particularly during the operation of the brush disk.

Unlike the state of the art according to DE 44 34 520 A1, in which the coupling sections are formed by the mushroom-shaped heads of the pins, the coupling sections according to the invention therefore have guide sections additional, which are engaged with the opposite sections of the flange side.

Preferably the at least one guide section and / or the at least one opposite section, are configured in such a way that when they are turned to the fixing position they are meshed together at least by sections in positive connection.

The guide section is advantageously provided on at least one side of the at least one coupling section, which runs transversely with respect to the direction of rotation. The direction of rotation is the direction in which the brush disk is rotated in relation to the flange, to bring it to the fixing position. Advantageously, the guide section is then engaged in the fixing position with the opposite section. In this case, a friction contact can occur particularly.

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

E12701860

06-02-2015

The guide section as such may be configured particularly as a wedge or as a wedge-shaped recess. A wedge-shaped recess is in this case a complementary recess to the wedge, in which a wedge can be engaged.

The wedge or the wedge-shaped recess particularly has two wedge surfaces that enclose a wedge angle, which run perpendicular to the plane of the brush disc. The plane of the brush disk is in this case the plane that is in the brush disk or that runs parallel to the cleaning side of the brush disk. The wedge or wedge-shaped recess, however, can also be configured such that a plane between the wedge surfaces runs parallel to the plane of the brush disk.

The provision of a wedge or a wedge-shaped recess has the advantage that when the brush disk is moved from the introduction position to the fixing position, a centering of the brush disk with respect to the wedge can occur on the flange.

It can also be thought that the wedge or wedge-shaped recess has an inclined introduction surface, which encloses with the plane of the brush disc, or a plane that runs perpendicular to it, an acute angle. By means of an inclined introduction surface of this type it can be ensured that together with a centering, an advantageous introduction of the guide sections can also be produced as far as the opposite sections are concerned. In addition, it can be ensured that in the fixing position the brush disk can reach a predetermined position with respect to the flange in the axial direction.

The inclined introduction surface may in this case be configured as a flat surface. It may also be advantageously provided that the inclined introduction surface has a bulged configuration.

In another configuration of the invention, it is provided that the coupling section has two sides that run transversely with respect to the direction of rotation, in which essentially guide sections configured in mirror symmetry with each other are provided. Such a configuration has the advantage that depending on the gear to the right or to the left of the machine, a guide section with the opposite section can be engaged respectively.

Another embodiment of the invention is characterized in that the guide section is provided on the side of the at least one coupling section that interacts with the clamping section. The guide section is configured in this case accordingly with extension in the axial direction. The guide section is in this case in such a way that when the brush disk is turned from the introduction position to the fixing position, it engages with the opposite section. The guide section can be configured in this case particularly as a rib or as a rib in the form of a rib. The rib or the rib-shaped recess can be in this case on an orbit, which runs around the axis of rotation of the brush disk. The rib or the rib-shaped recess, can be square or triangular or also be curved, in its cross section. In addition, it is thought that the surface of the cross-section of the rib or of the rib-shaped recess decreases or increases along its longitudinal extension in the direction of rotation.

In another embodiment of the invention, it is provided that the guide section is configured as a chamfer in such a way that the chamfer encloses on one side with a radial plane that runs perpendicular with respect to the axis of rotation of the brush disc, a acute angle γ, and on the other hand encloses with an axial plane that runs perpendicular to the radial plane and through the axis of rotation, an obtuse angle δ. The chamfer is therefore configured in such a way that it does not run either perpendicular with respect to the radial plane, nor transverse with respect to the axial plane. The angle γ is preferably in a value in the range of 35 ° to 55 ° and preferably in the range at 45 °. The angle γ, which is preferably measured from an axial plane that cuts or delimits the chamfer in the direction of rotation towards the chamfer, particularly has a value in the range of 95 ° to 130 ° and preferably in the range of 100 ° to 110 ° .

The chamfer can be configured as such in this case as a straight plane or as a slightly curved plane or also be slightly domed. The chamfer preferably has a triangular or trapezoidal contour in plan view.

Such a configuration has the advantage that when the opposite section is configured in a complementary manner with respect to the guide section, when the brush disc rotates the guide section and the opposite section are engaged or come into contact with friction, and one can be guaranteed on the one hand a centering in radial direction and on the other hand an adjustment without clearance in axial direction. Preferably the guide section is configured at least essentially in a complementary manner with respect to the opposite section.

The opposite section can be configured in this case as a wedge-shaped recess or as a wedge, where the wedge-shaped recess or the wedge provide two wedge surfaces that enclose a wedge angle, which run particularly perpendicular to the plane of the wedge. flange.

E12701860

06-02-2015

The wedge-shaped or wedge-shaped recess may in this case have an inclined adjustment surface, which encloses an acute angle with the plane of the flange or a plane that runs perpendicular to it. The inclined adjustment surface may in this case be configured in such a way that when the brush disc has an inclined introduction surface, the inclined adjustment surface adjusts to the inclined introduction surface in the fixing position. Preferably the inclined adjustment surface and the inclined introduction surface then enclose corresponding angles.

In the case where the inclined introduction surface has a domed configuration, the inclined adjustment surface may be configured as a straight plane. In the case where the inclined adjustment surface has a domed configuration, the inclined introduction surface may be configured as a straight plane.

The clamping section can also be configured in such a way that two sides are provided that run transversely with respect to the direction of rotation, in which essentially opposite sections configured in mirror symmetry with each other are provided.

It is particularly advantageous when the opposite section is configured at least essentially complementary to the guide section.

In another configuration, the flange is configured as a chamfer in such a way that the chamfer encloses on one side with a radial plane that runs perpendicular with respect to the axis of rotation of the flange, an acute angle γ ', and on the other hand it encloses with a axial plane that runs perpendicular to the radial plane and through the axis of rotation, an obtuse angle δ '. The angle γ ’is in this case preferably in the range of 35 ° to 55 ° and more preferably in the range of 40 ° to 45 °. The angle δ ’is preferably in the range of 95 ° to 130 ° and more preferably in the range of 100 ° to 110 °. The angle δ ’is measured in this case preferably starting from the axial plane in the direction of rotation towards the chamfer.

Particularly when the brush disc on one side and the flange on the other side have corresponding chamfers with each other, it can be achieved by moving the brush disc to the fixing position due to the gear and the sliding of the two chamfers between them, by a side, that the brush disk is centered in the radial direction and that it fits the flange in the axial direction without play. In this case it is advantageous when the flange chamfer runs in the parallel fixing position with friction contact with the brush disc chamfer.

With flange it is understood in the sense of the invention, the part on the side of the machine with which the torque is transmitted to the brush disc. The flange can be disposed in this case in an unattainable manner in the machine or in the drive shaft. As a rule, the flange is fixed to the machine by means of a screwed connection. On the other hand, it is thinkable that the flange can also be provided on the machine in an uncoupleable manner without tools. In this case, the flange can assume an adaptation function between the machine and the brush disk.

Further details and advantageous configurations of the invention are given from the following description, by means of which the embodiments shown in the figures are described and explained in greater detail.

They show:

Figure 1 a perspective view of a flange on the machine side;

Figure 2 a cut-out of a perspective view on a brush disk;

Figures 3 to 5 different views of brush disc cuts according to Figure 2;

Figures 6 to 8 different views of cutouts of the flange according to Figure 1;

Figures 9 and 10 two views of partial cuts of the brush disc with the flange just before reaching the fixing position;

Figures 11 and 12 two views of partial cuts of the brush disc and the flange upon reaching the fixing position;

Figure 13 a perspective view of a flange of another embodiment;

Figure 14 a perspective view of a brush disk for the arrangement on the flange according to Figure 13;

Fig. 15 a flange and a brush disk according to another embodiment;

Figure 16 an enlarged representation of the flange according to Figure 15;

5

10

fifteen

twenty

25

30

35

40

Four. Five

E12701860

06-02-2015

Figure 17 a cutout of a clamping section according to Figure 16;

Figure 18 a cutout of the brush disk according to Figure 15;

Figure 19 a cutout of a coupling section according to Figure 18;

Figure 20 shows a clipping of the coupling disk with the flange according to Figure 15 in the insertion position;

Figure 21 the introduction position according to Figure 20 in partial section;

figure 22 a cutout according to figure 20 in the fixing position;

Figure 23 the cutout according to Figure 22 with partially covered edges.

A flange 10 of the machine side of a floor cleaning machine is shown in Figure 1, in which a brush disc 12 can be arranged, as shown as a cutout in Figure 2.

The flange 10 provides for this purpose clamping sections 14 which extend radially.

The brush disc 12 provides a central housing 16, in which the flange 10 can be introduced axially. In the brush disc 12, in this case, coupling sections 18 are provided that project radially inwards. By joining the brush disc 12 with the flange 10, these coupling sections 18 are brought into insertion recesses 20 which are between the clamping sections 14. The brush disc 12 is then rotated with respect to the flange 10, of so that the coupling sections 18 are hooked from behind at least by sections to the clamping sections 14.

As is particularly clear from Figures 3, 4 and 5, the coupling sections 18 have wedge-shaped guide sections 22. As is particularly clear from Figure 5, the wedges 22 have wedge surfaces 23 which they enclose a wedge angle α, which run perpendicularly with respect to the plane of the brush disc 27 formed by the brush disk 12, which is represented in Figure 4. The wedges 22 are provided in this case on the side of the sections of coupling 18 that runs transversely with respect to the direction of rotation 24.

As is particularly clear from FIG. 4, the wedges 22 have an inclined introduction surface 26, which enclose with the plane of the brush disc 27 an acute angle β.

The inclined introduction surface 26 as such is configured in this case as a straight plane. It can also be thought, however, that the inclined introduction surface is domedly configured.

In addition to the wedges 21, they are provided on the flange 10, where appropriate in their clamping sections 14, opposite sections, which are configured as wedge-shaped recesses 28. The wedges 22 of the coupling sections 18 are engaged. in the fixing position, as shown in Figures 11 and 12, with the opposite sections of the flange 10, configured as wedge-shaped recesses 28.

The wedge-shaped recesses 28 also have wedge surfaces 30 that enclose a wedge angle, which can be particularly clearly recognized in Figure 8 and that run perpendicularly with respect to the plane of the flange 38. The wedge-shaped recesses 28 they also have an inclined adjustment surface 32 that runs parallel to the inclined introduction surface 26.

As is clear from Figures 2 to 5, each coupling section 18 provides two guide sections in the form of the wedges 22 that are provided on the far sides of each other that run transversely with respect to the direction of rotation. In addition, each of the clamping sections 14 on the flange side provides correspondingly - as is clear from figures 1, 6 to 8 - two opposite sections in the form of the wedge-shaped recesses 28, opposite one to the other, configured in mirror symmetry with each other.

When the disc 12 is joined with the flange 10, the coupling sections 18 are inserted as a consequence, as described above, depending on the direction in which the disc 12 or the flange 10 is rotated, they engage each other. wedges 21 and wedge-shaped recesses 28 facing each other. In this case, the clamping sections 14 essentially provide rear engagement surfaces 34 that run perpendicular to the axis of rotation of the flange 10, which interact with rear engagement surfaces 36 on the side of the coupling sections, which also run essentially perpendicularly. with respect to the axis of rotation of the disc 10 when rotating the disc 12 or the flange 10 from the position of introduction to the holding position. In figures 9 and 10 this intermediate position is represented.

5

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

E12701860

06-02-2015

In the fixing position, shown in Figures 11 and 12, the wedges 22 are engaged in the wedge-shaped recesses 28, and the inclined introduction surfaces 26 fit the inclined adjustment surfaces 32.

By means of the gear of the wedges 22 with the wedge-shaped recesses 28, the disc 12 can adopt an exact position with respect to the flange 10, and a centering of the disc 12 can be made particularly available on the flange 10. By the interaction of the inclined introduction surfaces 26 with the inclined adjustment surfaces 32, it is ensured that axial clearance between the brush disc 12 and the flange 10 is no longer provided, and in addition it can be ensured that the brush disc 12 takes a position predetermined in axial direction.

To ensure that the brush disc 12 is held in the fixation position, it is conceivable to provide fastener means that interact with each other on the flange 10 or in the brush disc 12.

The embodiment according to Figures 13 and 14, differs from the embodiment shown in Figures 1 to 12, because the guide sections on the side of the brush disc are not configured as wedges, but as notches 40, and that opposite sections of the flange side are not configured as wedge-shaped recesses, but as ribs 42. In Figures 13 and 14 the components corresponding to Figures 1 to 12 are provided with the same references.

The flange 44 shown in FIG. 13 shows the ribs 42 on the rear engagement surfaces 34 of the fastening sections 14, which are in plan view on a line that is around the axis of rotation of the flange 44. ribs 42 as such, extend in this case in axial direction away from the rear engagement surfaces 34. The ribs 42 have a slightly conical configuration in cross section.

From Fig. 14, which shows the brush disc 46, it is clear that the coupling sections 18 provide on their rear engagement surfaces 36 rib-shaped recesses 40, which are configured in a complementary manner to the ribs 42. At turn the flange 44 or the brush disc 46 from the introduction position to the fixing position, the ribs 42 are engaged with the rib-shaped recesses 40.

In the embodiment shown in FIGS. 13 and 14, inclined insertion surfaces 26 are also provided in the coupling sections 26. Corresponding inclined adjustment surfaces 32 are provided on the flange 44. In the fixing position the inclined introduction surfaces 26 act against the inclined adjustment surfaces 32.

In the embodiments shown in Figures 15 to 23, the guide sections of the brush side, as well as the opposite sections of the flange side, are configured as inclined chamfers, which are described in greater detail below. . In these embodiments, the components that have already been described above have the same references.

Figure 15 shows a flange 50 with a corresponding brush disc 52. In the flange 50 there are arranged in this case clamping sections 14 that project radially outwards. Coupling sections 18 are provided in the housing 16 of the brush disc 52 which are introduced radially inwards. When the brush disc 52 is driven with the flange 50, these coupling sections 18 are brought into insertion recesses 20 which are between the clamping sections 14. Then it is rotated, as already explained in relation to Figure 1 , the brush disc 52 with respect to the flange 50, so that the coupling sections 18 are hooked at the back at least by sections to the clamping sections 14.

As is particularly clear from Fig. 16, and also from Fig. 17, guide sections in the form of chamfers 62 that run in an inclined manner are provided in the clamping sections. As is clear from the enlargement according to Figure 17, the chamfer 62 shown there encloses a radial plane that runs perpendicularly with respect to the axis of rotation, which is indicated in Figure 17 with reference 64, an acute angle γ. In addition, the chamfer 62 encloses an axial plane 66 that is perpendicularly on the radial plane 64 and cuts the axis of rotation, an obtuse angle δ. In Figure 17, the front side 68 turned towards the direction of rotation of the clamping section 14 is in an axial plane 66 of this type. Advantageously the angle γ is in the range of 45 °, and the angle δ in the range of 100 °.

From figures 18 and 19 it is clear that the brush disc 52 has in its coupling sections 18, guide sections configured in a complementary manner to the chamfers 62, also in the form of chamfers 72. As it is clear from the enlargement according to figure 19, these chamfers 72 enclose with a radial plane that runs perpendicular to the axis of rotation, an acute angle γ ', and with an axial plane perpendicular to the radial plane and that cuts the axis of rotation, an obtuse angle δ '. In Figure 19, the section of the coupling section 74 that is connected to the chamfer 72, is placed in such a radial plane. The section 76, which is connected to the coupling section 18, is in an axial plane of this type. The angle γ ’is in this case preferably in the range of 45 °. The angle δ ’is in this case preferably in the range of 100 °.

E12701860

06-02-2015

Because the chamfers 62 and 72 are not arranged running either perpendicular to the radial planes that cut them, nor perpendicular to the axial planes that cut them, and because the chamfers 62 and 72 are arranged in the fixing position essentially limiting parallel to each other, it can be achieved by rotating the brush disc to the fixation position, on the one hand a centered in radial direction, and on the other hand a contact without

5 clearance in axial direction.

Figure 20 shows the introduction position. From the partial section according to Figure 21, it is clear that the clamping section 14 is disposed between two coupling sections 18 on the side of the brush disc. In figure 22 the brush disc 52 is in the fixing position. From figure 23 it is clear that chamfers 62 and 72 are in this position running parallel to each other in contact.

10 In the case of the flange 10, 44 and / or 50 shown in the figures, it may be a flange disposed in a detachable manner on the machine. The flange can be arranged in this case, for example, by means of fixing screws or by means of unattachable fixing types without tools, on the machine or its drive.

The invention is not limited in this case to the guide sections and corresponding counter sections in the form of wedges or wedge-shaped recesses, corresponding, or ribs or recesses in the form

15 ribs, corresponding or corresponding chamfers, shown in the embodiments. Other sections are also included according to the invention, which have a corresponding function.

In addition, it does not have to be mandatory, that the opposite sections are configured in a complementary way to the guide sections. The decisive thing is that the guide sections engage with the opposite sections to give rise to the desired effect.

twenty

Claims (13)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty

one.

Coupling device of a machine for floor cleaning comprising a brush disk (12, 46) and a flange (10, 44), where the brush disk (10, 46) has coupling sections (18), where the flange (10, 44) has clamping sections (14) and insert recesses (20), where the coupling sections (18) for coupling the brush disc (12, 46) to the flange (10, 44), can be introduced in an axially inserted position in the insertion recesses (20) of the flange side, and by turning the brush disc (12, 46) they are engaged from behind to the clamping sections (14) of the flange side, when reaching a fixing position, characterized in that at least one coupling section (18) that is hooked from behind in the fixing position, has a guide section (22, 40), which when rotating the brush disc ( 12, 46) to the fixing position can be engaged in such a way with an opposite section (28, 42) that is provided in the clamping section (14) of the flange side, which in the fixing position is also hooked from behind, which produces a centered alignment of the brush disc (12 , 46) with respect to the flange (10, 44) in the fixing position.

2.

 Device according to claim 1, characterized in that the guide section (22, 40) and the opposite section (28, 42) are configured in such a way that, when the brush disk is turned to the fixing position, the guide section fits in axial direction without play to the opposite section (28, 42).

3.

Device according to claim 1 or 2, characterized in that the guide section (22) is provided at least by sections on at least one side of the at least one coupling section (18), which runs transversely with respect to the direction of turn (24).

Four.

 Device according to one of the preceding claims, characterized in that the at least one opposite section (28, 42) is configured in a complementary manner with respect to the at least one guide section (22, 40).

5.

Device according to one of the preceding claims, characterized in that the guide section (22) is configured as a wedge or as a wedge-shaped recess, and the opposite section (28) as a wedge-shaped recess or as a wedge, where the recess Wedge-shaped or wedge provide two wedge surfaces (30) that enclose a wedge angle.

6.

Device according to claim 5, characterized in that the wedge (22) or the wedge-shaped recess has an inclined introduction surface (26), which encloses with the plane of the brush disc (27) or the plane of the flange, a acute angle (β).

7.

Device according to one of the preceding claims, characterized in that the coupling section (18) has two sides that run transversely with respect to the direction of rotation (24), in which essentially guide sections (22) configured in symmetry are provided mirror each other.

8.

Device according to one of the preceding claims, characterized in that the guide section (40) is provided on the side of the at least one coupling section (18) that interacts with the clamping section (14).

9.

Device according to one of claims 1 to 4, 7 or 8, characterized in that the guide section (40) is configured as a chamfer in such a way that the chamfer encloses on one side with a radial plane that runs perpendicularly with respect to the axis of rotation of the brush disc, an acute angle γ, and encloses on the other hand with an axial plane that runs perpendicularly with respect to the radial plane and through the axis of rotation, an obtuse angle δ.

10.

 Device according to claim 9, characterized in that the angle γ is in the range of 35 ° to 55 °, and preferably in the range of 40 ° to 50 °, and / or the angle δ in the range of 95 ° to 150 °, and preferably in the range of 100 ° to 110 °.

eleven.

Device according to one of claims 9 or 10, characterized in that the chamfer is configured as a straight, slightly curved or bulged surface and / or in plan view has a triangular or trapezoidal contour.

12.

Device according to claim 9, 10 or 11, characterized in that the opposite section (28) is configured as a chamfer in such a way that the chamfer encloses on one side with a radial plane that runs perpendicularly with respect to the axis of rotation of the flange, an acute angle γ ', and on the other hand it encloses with an axial plane that runs perpendicularly with respect to the radial plane and through the axis of rotation, an obtuse angle δ'.

13.

Device according to one of claims 1 to 4, 7 or 8, characterized in that the guide section (40) is configured as a rib or as a rib-shaped recess, and that the opposite section (28, 42) is configured as a recess in the form of a rib or as a rib.

8