BEARING ARRANGEMENT AND THUS EQUIPPED PROCESSING DEVICE

Abstract

In order for contaminants (50) that are in particular liquid or highly viscous or solid and impact in an operating portion (40b) of one or 2 processing shafts (40.1, 40.2) that rotate adjacent to each other not to reach bearings (2) of the shafts (40.1, 40.2) which are arranged axially outside of the processing portion (40b) which could damage the bearings a wiping device (6) is arranged there between which is additionally axially shielded by a bearing plate (3) and a splash guard plate (4) wherein the wiping device provides that contaminants (50) that reach the wiping section (40a) are wiped off at this location and cannot move further through the bearing plate (3) to the bearing (2) that is arranged outside of the bearing plate (3).

Claims

1. A bearing arrangement (1) for a processing shaft (40) that rotates about a rotation axis (40) of a compacting, perforating or cutting device for objects (200) to be processed, the bearing arrangement comprising: an axially fixed or an axially floating shaft bearing (2), a bearing plate (3) on whose outside (3a) the shaft bearing (2) is attached directly or at a distance therefrom, a splashguard wall (4) arranged inside (3b) of the bearing plate (3) and at a distance (5) from the bearing plate (3), wherein the bearing plate (3) and the splashguard wall (4) respectively include a passthrough opening (13, 14) for each processing shaft (40), characterized in that a wiping device (6) with a wiper (7) is arranged in between the bearing plate (3) and the splashguard wall (4) configured to wipe contaminants from a wiping section (40a) of the processing shaft (40) extending through the distance or from a shaft portion annual annular disc (17) that is attached torque proof on the shaft.

2. The bearing arrangement according to claim 1, characterized in that the wiper (7) is arranged fixed in place in a transverse direction (11) to the shaft (40) and contacts with a wiper edge (7a) at the wiping section (40a) directly or at the shaft element that is attached on the shaft torque proof so that the wiper contacts directly or indirectly radially at a circumference (8) or axially at a radial shoulder (9) of the wiping section (40a).

3. The bearing arrangement according to claim 2, characterized in that the circumference (8) is a base (12a) of a circumferential groove (12), or the radial shoulder (9) is a side flank (12b) of a circumferential groove (12) and the wiper (7) advantageously only contacts one of the side flanks (12b).

4. The bearing arrangement according to claim 1, characterized in that the wiper (7) is movably attached in the axial direction (10) directly or indirectly at the bearing plate (3), or the splash guard wall (4), at wiper support (18) attached at the bearing plate (3).

5. The bearing arrangement according to claim 1, characterized in that the wiper (7) is preloaded by a spring (16) in a radial and/or axial contact direction towards the wiping section (40a) or towards the shaft element that is attached on the shaft torque proof.

6. The bearing arrangement according to claim 2, characterized in that the wiper edge (7a) contacts the wiping section (40a) or a shaft element that is attached on the shaft torque proof below a center of the circumference (8).

7. The bearing arrangement according to claim 1, characterized in that the wiper (7) is a wiper that rotates about a rotation axis (7) that is parallel to and offset from the rotation axis (40) of the shaft (40), wherein the rotating wiper contacts a radial shoulder (9) of the wiping section (40a) or a shaft element that is attached torque proof on the shaft, and the rotating wiper (7) and the wiping section (40a) rotate counter acting.

8. The bearing arrangement according to claim 1, characterized in that, the rotating wiper (7) is a wiping disc with an approximately radially oriented, in particular radial contact surface (7b).

9. The bearing arrangement according to claim 8, characterized in that the wiping disc is attached as a separate component torque proof and sealed tight in the axial direction (10) on the shaft (40) or integrally configured therewith in one piece.

10. The bearing arrangement according to claim 8, characterized in that plural notches (19) are arranged in the wiping disc in its largest outer diameter distributed over the circumference.

11. The bearing arrangement according to claim 1, for a processing device with two parallel counter rotating shafts (40.1, 40.2) characterized in that, the rotating wiper (7) is a wiping disc which rotates about the rotation axis (40) of a first shaft (e.g. 40.1) and is connected at the first shaft at least torque proof, and a radial shoulder (9) is configured at the wiping section (40a) of a second shaft (e.g. 40.2).

12. The bearing arrangement according to claim 11, characterized in that, the radial shoulder (9) or annular face that contacts a wiping disc (7.1) is configured at another wiping disc (7.2) and/or the two wiping discs (7.1, 7.2) are configured identical and the radial shoulder (9) is a contact surface (7b) of the other wiping disc (7.2).

13. The bearing arrangement according to claim 11, characterized in that, the radial shoulder (9) or annular face that contacts a wiping disc (7.1) is configured by a side flank (12b) of a circumferential groove (12).

14. The bearing arrangement according to claim 2, characterized in that, the circumferential groove (12) is arranged either in an outer circumference of a shaft element that is slid over the wiping section (40a) and fixed at least torque proof and axially tight in the distance (5) and configured as an annular disc (17), or is formed by the axial offset (15) between two rings (17).

15. The bearing arrangement according to claim 1, characterized in that, a ring (17) with a circumferential groove (12) is arranged torque proof at a first shaft (40.1), and at least one rotating wiper (7) is arranged torque proof at the other shaft (40.2), wherein the rotating wipers respectively contact one of the side flanks (12b) of the circumferential groove (12) or one of the face side radial annular surfaces of the ring (17).

16. The bearing arrangement according to claim 1, characterized in that, the splash guard wall (4) is made from two wall elements (4a and 4b) that are connected with one another in a disengageable manner wherein the wall elements adjoin in the vertical and circumferentially envelop the at least one processing shaft (40.1, 40.2), wherein the upper wall portion (4a) includes a downward open pass through opening (14.1a) in its lower portion for each processing shaft (40) or the lower wall portion (4b) includes an upward open pass through (14.1b) for each processing shaft and advantageously in its lower portion a downward open pass through (14.2) for each wiper rod (18).

17. The bearing arrangement according to claim 16, characterized in that, at least one of the downward open pass through openings (14.1a) of the upper wall portion (4a) and/or at least one of the upward open pass through openings (14.1b) of the lower wall element (4b) engages a circumferentially extending groove in the processing shaft (40.1, 40.2), or at least one of the downward open pass through openings (14.2) of the lower wall element (4b) engages a circumferentially extending groove (27) in the wiper rod (18.1, 18.2).

18. A compacting, perforating, or cutting device including at least one processing shaft (40) that is rotatably supported by at least one bearing arrangement (1) in a housing of the processing device, characterized in that the bearing arrangement (1) of the processing shaft (40) is configured according to claim 1.

19. The device according to claim 18, characterized in that, at least one non-co rotating wiper (7) is configured identical to wipers (7) that are arranged in a processing section (40b) of the at least one processing shaft (40.1).

Description

c) EMBODIMENTS

[0056] Embodiments of the invention are subsequently described with reference to drawing figures, wherein:

[0057] FIG. 1a illustrates a first embodiment of the bearing arrangement in a perspective view

[0058] FIG. 1b illustrates a perspective view of the partially disassembled bearing arranged of FIG. 1a looking at the wiping device;

[0059] FIG. 2a illustrates a transversal view of the bearing arrangement according to FIG. 1a;

[0060] FIG. 2b illustrate an axial sectional view along the bearing arrangement of FIG. 1a;

[0061] FIGS. 2c, d illustrates a blown up alternative embodiment of the wiping device according to FIG. 2b;

[0062] FIG. 3 illustrates the partially dismounted bearing arrangement of FIG. 1b viewed in an axial direction;

[0063] FIG. 4 illustrates a perspective view of a partially dismounted second embodiment of the bearing arrangement;

[0064] FIG. 5a illustrates an axial sectional view through a second embodiment of the bearing arrangement;

[0065] FIG. 5b illustrates a transversal view of the bearing arranged according to FIG. 5a;

[0066] FIG. 6 illustrates a longitudinal sectional view of a second embodiment of the bearing arrangement that is an alternative to FIG. 5a;

[0067] FIG. 7 illustrates an axial sectional view of a processing device.

[0068] The bearing arrangement 1 is illustrated in all drawing figures with reference to the support of 2 processing shafts 40.1, 40.2 subsequently designated as shafts that are parallel and adjacent to each other and rotate about an axial direction 10 which as illustrated e.g. in FIGS. 1b and 4a have axially offset portions with larger and smaller outer diameters thus between their 2 end side bearing arrangements. Which however is operating cross section 40b thus between which however is irrelevant for the instant invention and wherein additionally the portions with the greater outer diameter are configured serrated in the circumferential direction, wherein the 2 shafts 40.1 and 40.2 are arranged so that they mesh with each other with their portions of greater and smaller diameters.

[0069] Thus, objects 200 can be pulled between the two shafts 40.1 and 40.2 running against each other as illustrated for an operating device 100 in FIG. 7 between the 2 shafts 40.1 and 40.2 which are at least compressed by the 2 shafts 40.1, 40.2 and typically also perforated. The pull through is typically performed gravity supported top down.

[0070] The housing of the operating device 100 typically includes a feed opening 100a that is open at the top side for feeding the objects 200 to be processed and at a lower end an outlet opening 100b for the objects 200 to the compacted is visible from FIG. 7.

[0071] The two shafts 40.1 40.2 are supported at each of their ends in a common bearing plate 3 and on their insides a splash guard 4 is attached that also continues over both shafts 40.1, 40.2. The shaft assembly that includes the 2 bearing plates 3, optionally longitudinal struts connecting the 2 bearing plates 3 and the two splash guard walls 4 and the shafts 40.1 40.2 including the bearings 2 and the subsequently described wipers 6 is bolted by suitable attachment lobes against the housing of the processing device 100 and can be retrieved as a sub assembly from the processing device 100 after disassembly.

[0072] Additionally wiper supports configured as wiper bars 18 are provided in all figures parallel below and with respect to the center between both shafts 40.1, 40.2 slightly further outside in the same longitudinal direction 10, thus parallel to the shafts 40.1, 40.2 wherein the wiper support has a circular outer circumference in this case.

[0073] The wiper 7 that are visible in particular in FIGS. 2b and 5a that are provided in the processing section 40b are arranged in a form locking manner between a respective wiper rod 18.1 or 18.2 in a form locking manner and one of the sections with smaller outer diameter of the adjacent shaft 40.1 or 40.2.

[0074] The plate shaped wipers 7 respectively include an approximately semicircular recess at opposite end portions wherein the outer contour of the wiper rod 18.1 or 18.2 fits into one recess and the outer circumference in the axial section of the shaft 40.1 or 40.2 where the wiper contacts fits into the other recess.

[0075] The recess that contacts the shaft 40.1 or 40.2 terminates respectively with a wiper edge 7a which contacts the respective outer circumference of the shaft 40.1, 40.2 in any case in order to remove contaminants 50 that are provided at this location even when the recess oriented towards the other circumference of the shaft 40.1, 40.2 is otherwise greater than the outer circumference of the shaft and the entire recess does not contact the outer circumference of the shaft 40.1 and 40.2.

[0076] FIGS. 1a-3 illustrate a first embodiment of the bearing arrangement 1 where a wiper 7 contacts an outer circumference of the shaft 40.1 or 40.2 in a wiping section 40a that is axially offset from the processing section 40b and arranged between the end side bearing 2 and the processing section 40b of the shaft wherein the wiper like the wiper 7 in the processing step 40b does not rotate but is supported in a form locking manner between the wiper rod 18.1 or 18.2 and the adjacent shaft 40.1 or 40.2 but move able in the axial direction 10 along a wiper rod 18.1 and 18.2 supporting it and advantageously also pivot able about the wiper rod 18.1 or 18.2.

[0077] With respect to the outer contour and/or the thickness and/or other factors like e.g. material the wiper 7 that is used in the wiping portion 40a can also be identical to the wipers 7 that are used in the operating portion 40b of the shafts 40.1 or 40.2.

[0078] As evident from FIG. 1a, 1b a splash guard 4 is arranged between the processing section 40b and the wiping section 40a wherein the shafts 40.1 and 40.2 reach through the splash guard wall 4 and furthermore the bearing plate 3 is arranged between the wiping device 6, thus the wiping section 40a of the shafts 40.1, 40.2 and the bearing 2 and its bearing receiver 22 wherein the bearing receiver 22 for the bearing 2 is arranged on an outside of the bearing plate thus on a side that is oriented away from the splash guard wall 4 and the processing section 40b.

[0079] Thus, not only the bearing plate 3 is arranged between the bearing 2 and the processing section 40b of the shafts 40.1, 40.2 but also the splash guard wall 4 both of which made the penetration or contaminants 50 from the processing section 40b to the bearing 2 more difficult and this is rendered even more difficult by the wiping device 6 which is arranged in the offset 5 between the two plates 3, 4.

[0080] This offset 5, however, in this case is not closed on all sides but advantageously respectively open on a face side in a direction in which the two shafts 40.1, 40.2 are arranged behind one another which is the first transversal direction 11.1 and only closed completely on the top side and partially closed on the bottom side.

[0081] It is evident that this is achieved in that the splash guard 4 is configured approximately U-shaped in the first transversal direction 11.1 and attached with its open side so that the open side is oriented towards the bearing plate 3. For this purpose the approximately U-shaped cross section of the splash protection wall 4 has a protrusion on the top side which protrusion extends approximately in a direction of the connecting U-shape wherein the protrusion contacts an inside of the bearing plate 3 and can be bolted together with the bearing plate 3 by bore holes 21 that are provided in this arm of the splash protection wall 4.

[0082] At the lower end the splash protection wall 4 is advantageously attached in a form locking manner at the bearing plate 3 in that a lower freely terminating arm of the profile of the splash protection wall 4 that is oriented towards the bearing plate 3 has protrusions which can be inserted bottom up into downward open recesses 3.1 in the lower end of the bearing plate 3 and which are supported in a form locking manner is 5 out of 6 dimensions in space due to a broadened inside head of the protrusions 4.1.

[0083] As evident from FIG. 2b the bearing receiver 22 is configured annular and is supported by four threaded connection 23 that are distributed over the circumference and otherwise supported at a distance from the outside 3a of the bearing plate 3 so that contaminants can drain in downward direction through the offset provided there between. The bearing receiver 22 this an outward oriented shoulder where the bearing 2 that is inserted from an outside can be applied and is secured in this position by a retaining ring that is introduced from an outside.

[0084] Furthermore downward open pass through openings 14.1, 14.2 are provided in the splash guard wall 4 wherein wiper rods 18.1, 18.2 extend through their upper ends so that the wiper rods can be pulled in downward direction out of the splash guard plates 4 after a face side threaded connection relative to the bearing plate 3 at whose inside 3a the wiper rods terminate has been disengaged.

[0085] The pass through openings 13 in the bearing plate 3 through which one of the shafts 40.1, 40.2 extends however are circumferentially closed pass through openings as well as the pass through openings 14.1 for the pass through of one respective shaft in the splash guard wall 4, both are additional sized so that they reach as close to the outer circumference of the shaft 40.1, 40.2 as possible however without touching as close to the outer circumference of the shaft as close as possible, however without touching it so that a labyrinth seal is formed.

[0086] However the configuration of the wiping device 6 is essential for the invention wherein the wiping device 6 is arranged in the intermediary space 5 between the splash guard wall 4 and the bearing plate 3.

[0087] At this location a ring groove 12 is configured in a ring 17 that is attached torque proof on an outer circumference of the respective shaft 40.1, 40.2 as illustrated in FIG. 2b, lower half, alternatively integrally in one piece directly in the outer circumference of the shaft 40 in which a plate shaped wiper 4 engages whose width measured in the axial direction 10 is slightly smaller than a width of the ring groove 12 wherein the plate shaped wiper 7 engages the ring groove 12 and is retained between the wiper rod 18 and the shaft 40.2 or 40.2 as described supra with reference to the operating portion 40b.

[0088] In this case the ring 17 penetrates the splash guard 4 however it terminates in front of the inside 3a of the bearing plate 3.

[0089] As evident in the axial view of FIG. 3 the recess 7b in the circumferential contour of the wiper 7 either contacts the outer circumference of the shaft 40.1 or 40.2 however it can also extend in portions at a distance therefrom, however at least one of the wiper edges 7a shall either contact an outer circumference of the shaft 40.1, 40.2 or a circumference 8 of the ring 17, namely the base of the ring groove 12 and thus advantageously the wiper edge 7a which is oriented against the rotation direction 20.1 or 20.2 of the shaft 40.1, 40.2, thus the wiper edges are arranged at a front end of the wiping protrusion which is arranged between the recess 7b and the rest of the circumferential contour of the wiper 7 wherein there are two wiper edges.

[0090] Since the directions of rotation of the two shafts 40.1, 40.2 are opposite to each other according to FIG. 3 and thus so that they are oriented against each other in the upper portion the lower wiper edges 7a of the two wipers 7 that are advantageously arranged between the two shafts 40.1, 40.2 shall contact the outer edge of the respective ring 17 in order to have the desired scraping effect and to wipe off contaminants 50 from the shaft 40.1, 40.2 that are provided on the outer circumference.

[0091] For this purpose the two wiper edges 7a are radially preloaded against the outer circumference of the shaft as illustrated in FIG. 3, e.g. by a compression spring 16 that is arranged between the 2 wipers 7 and presses them away from each other and thus presses the two adjacent lower wiper edged 7a radially against the respective circumference 8,

[0092] Instead or in a supplemental manner to this radial contact of the wipers 7 at the respective shaft 40.1, 40.2 also an axial contact at least at one radially flank 9, e.g. one of the flanks 12b of the ring groove 12 is desirable which in this case are annular surfaces that are parallel to each other and orthogonal to the axial direction 10 which however is not mandatory for obtaining the desired cleaning effect.

[0093] Since the wiper is preloaded in the axial direction 10 by a spring 16, against either of the flanks 12b the circumferential edge of the plate shaped wiper 7 contacts the corresponding shoulder 12 and strips contaminants 50 from the corresponding shoulder 12 as illustrated in an exemplary manner only in FIG. 2a.

[0094] FIG. 2b illustrates in the lower half that the ring 17 in which the circumferential groove 12 is fabricated can be configured integral in one piece or according to the upper half it illustrates that the ring groove 12 can also be formed by individual annular discs 17.1, 17.2 that are connected torque proof in the shaft 40.1, 40.2 which are kept at a distance e.g. by annular spacers 24 with a smaller outer diameter so that the distance 15 between the slices 17 forms the ring groove 12 and for example the outer circumference of the annular spacer 24 represents the circumference 8 where the wiper 7 that is pressed in contact in the radial direction contacts with its wiper edge 7a.

[0095] The enlarged details of FIGS. 2c and 2d of FIG. 2b show alternative solutions of the wiping device.

[0096] Thus, FIG. 2c illustrates that a stationary or rotating wiper 7 can be arranged in stead or in addition to the wiper 7 that penetrates the ring groove 12 and is stationary or rotates wherein the additional wiper contacts also on an outside of one of the two ring groove flank elements, e.g. of the discs 17 contacting their outside wherein the additional wiper 7 can contact the outside and/or also the circumferential portion of the adjacent to the outer flank.

[0097] FIG. 2d shows a solution where the ring groove 12 has a width so that two stationary or rotating wipers 7 penetrate the ring groove 12 that are arranged adjacent to each other with an axial offset there between wherein the wipers either contact one of the essentially radially extending flanks 12a, b and on the other hand side in case of a stationary wiper 7 contact their groove base 12a.

[0098] For this purpose the two wipers 7 are advantageously preloaded against each other in an outward direction in particular radially, e.g. by a spring 17.

[0099] It is appreciated for a non-exactly radial extension of the corresponding flanks 12b or of the outsides of the flank elements the side surfaces oriented in the axial direction of wipers 7 that contact at this location have to be oriented analogously and parallel to the outsides of the flank elements.

[0100] FIG. 3 furthermore illustrates that notches 19 can be provided in an outer circumference of the flank elements, e.g. of the annular discs 17.1, 17.2 which define the groove 12 and which facilitate a disengagement of contaminants 50 which the circumferential edge of the wiper 7 moves along from the annular discs 17.1, 17.2.

[0101] As illustrated for the right disc 17.2 in FIG. 3 the notches 19 can be V-shaped and oriented with a tip in particular to the rotation axis 40 of the respective shaft 40.1, 40.2, in particular they can also be configured symmetrical with respect two flanks.

[0102] On the other hand side a notch 19 is illustrated at the left disc 17.1 wherein one flank 19a of the notch extends at a much steeper angle to the radial direction than the other flank 19b, wherein the flatter flank 19b is the front flank 19b in the rotation direction so that the steeper rear flank 19a hits a piece of contamination 50 instantaneously and causes a high release force.

[0103] FIGS. 4a-7 illustrate a second embodiment where a rotating wiper 7 is used instead of a stationary wiper for cleaning the rotating surface.

[0104] As evident from FIGS. 4a, b where the bearing plate 3 and the bearing 2 is omitted relative to the illustrations according to FIGS. 5a, b in order to better show the wiping device 6 this embodiment of the wiping device 6 differs from the embodiment according to FIGS. 1a-3 in that a wiping disc 7.1, 7.2 is arranged torque proof of each of the 2 shafts 40.1, 40.2 wherein the wiping discs have an outer diameter that is large enough so that they overlap in the radial direction and so that they have a contact surface 7b that primarily extends in the radial direction advantageously exactly extends in the radial direction wherein they contact each other axially at least with the circumferential edge of the this contact surface 7b.

[0105] Advantageously the outer circumference of the discs 7.1, 7.2, however, is only sized so that they do not contact with their outer circumference at the radially opposite circumferential surface of the adjacent shaft 40.1 or 40.2 or of a ring 17 that is attached thereon torque proof but so that a radial gap 25 remains there between.

[0106] Additionally FIG. 5 illustrates the driven end of a shaft 40.1, which is implemented in that a sprocket 26 is attached torque proof on the shaft end wherein the sprocket extends axially beyond the bearing 2 and which can drive the shaft 40.1 by a non-illustrated chain that is run over the sprocket.

[0107] The described wiping devices 6 can be arranged at a driven as well as at a non-driven end of the respective adjacent bearing arrangement 1 of a shaft 40.1 and independently from the bearing 2 being an axially fixed bearing or an axially floating bearing, wherein in particular on a side of the axially loose bearing the axial preload of the wiper 7 or of the wiping disc 7.1, 7.2 against the primarily radially extending surface is important.

[0108] As illustrated in FIGS. 5a, b both wiping discs 7.1, 7.2 have a cross section that tapers conically towards a free end, wherein however a flank of the cross section continues flat over an entire radial extension, advantageously exactly in the radial direction and the flank of the cross section of the 2 wipers discs 7.1, 7.2 that are oriented towards each other and which continuously flat forming a contact surface 7b contact one another, wherein however at least a circumferential edge of this contact surface 7b functions as an axially contacting wiper edge 7a.

[0109] As evident from FIGS. 4a, b the two wiping discs 7.1, 7.2 which can have the same notches 19 at their outer circumference as described with reference to FIGS. 1a to 3 together with the shafts 40.1, 40.2 on which they are mounted torque proof so that they rotate counter acting so that they run towards each other in an upper portion.

[0110] Thus, each of the two axially contacting wiper edges 7a in this case the outer circumference which advantageously also has an axial extension as illustrated in 5a, b which however could also be configured as a cutting edge so that contaminants 50 are wiped off from the contact surface 7b and transports the contamination 50 through the gap 25 into a portion below the elevation of the shaft axes 40 where they advantageously drop gravity induced from the wiper edge 7a or remain at least at the contact surface 7b in its radially inner portion, but they cannot reach the radially outer circumference of the respective wiping disc 7.1, 7.2 or move over it in the axial direction 10.

[0111] Advantageously the lower arm of the splash guard plate 4 is also oriented against the bearing plate 3 is non continuous but interrupted also remote from the recesses 14.2 as drawn in dashed lines in FIG. 4a, so that contaminants 50 that drop down can drop through this arm in downward direction so that contaminants 50 that have just recently dropped down can collect in the free space between the bearing plate and the splash guard wall 4.

[0112] FIGS. 6a and 6b illustrate two additional wiping devices in a top view onto the 2 shafts 40.1, 40.2 that are arranged adjacent to each other.

[0113] FIG. 6a illustrates a ring 17 in the wiping section 40a that is mounted torque proof on the first shaft 40.1 and includes an annular groove 12 fabricated therein in analogy to FIGS. 1a-3.

[0114] On the other shaft 40.2, however two wiping discs 7.1, 7.2 are mounted wherein each wiping disc contacts one of the flanks 12b of the annular groove 12 with its advantageously radially extending annular contact surface 7b.

[0115] Additionally one of the wiping discs 7.1, 7.2 can have an outer circumferential surface 10 that is configured very wide in the axial direction and which functions as a radially contacting wiper edge 7a by which it radially contacts the base 12a of the groove 12.

[0116] Advantageously the two wiping discs 7.1, 7.2 are preloaded away from each other, e.g., by a spring 16 in the axial direction 10 and thus preloaded in a direction so they contact the two groove flanks 12.b.

[0117] FIG. 6b illustrates an inverse solution where a wiping disc 7 is attached torque proof on one of the shafts 40.1 and co-rotates wherein the wiping disc includes two advantageously radially extending annular contact surfaces 7b.

[0118] On the other shaft 40.2 two wiping discs 7* are arranged in this wiping section 4a and mounted so that they are movable in the axial direction 10 along the shaft 40.2. Each of the two wiping discs 7* includes an advantageously radially extending annular contact surface 7*b by which it contacts the analogously oriented, in particularly radially extending, contact surface 7b of the wiping disc 7 of the other shaft 40.1.

[0119] Thus, advantageously a preload of the two axially offset wiping discs 7* of the first shaft 40.2 relative to the outer faces of the wiping disc 7 of the other shaft 40.1 is provided, advantageously by a tension spring 16 that is arranged between the two axially offset wiping discs 7*.

REFERENCE NUMERALS AND DESIGNATIONS

[0120] 1 Bearing arrangement [0121] 2 Bearing [0122] 3 Bearing plate [0123] 3.1 Recess [0124] 3a Outside [0125] 3b Inside [0126] 4 Splashguard wall [0127] 4.1 Protrusion [0128] 5 Offset, intermediary space [0129] 6 Wiping device [0130] 7,7*,7.1, 7.2 Wiper, wiper wiping disc [0131] 7 Contact direction [0132] 7a Lower wiper edge [0133] 7b Radial contact surface [0134] 8 Circumference [0135] 9 Radial shoulder [0136] 10 Axial direction [0137] 11 Transversal direction, radial direction [0138] 12 Circumferential groove [0139] 12a, b Face, side flank [0140] 13 Passthrough opening [0141] 14 Pass through Opening [0142] 15 Offset [0143] 16 Spring [0144] 17 Ring, annular disc [0145] 18, 18.1, 18.2 Wiper support, wiper rod [0146] 18 Support direction [0147] 19 Notch [0148] 19a, b Flank [0149] 20.1, 20.2 Rotation direction [0150] 21 Bore hole [0151] 22 Bearing receiver [0152] 22a, b receiving element [0153] 23 Bolte connection [0154] 24 Spacer [0155] 25 Gap [0156] 26 Sprocket [0157] 27 Groove [0158] 40, 40.1, 40.2 Processing shaft, shaft [0159] 40 Rotation axis [0160] 40a Wiping section [0161] 40b Processing section [0162] 50 Contamination [0163] 100 Processing device [0164] 100a Feed opening [0165] 100b Drain opening [0166] 101 Housing [0167] 200 Object