DISK FOR A DISK CLUTCH OR BRAKE, DISK CLUTCH OR BRAKE WITH SUCH A DISK, AND A METHOD FOR PRODUCING SUCH A DISK

Abstract

The present invention relates to a disk (2) for a disk clutch or brake (4) comprising a first friction surface (28) and a second friction surface (34) facing away from the first friction surface (28), in which recesses and/or grooves (40, 42, 44) are provided. A first type of recesses and/or grooves (40), which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, is provided in the first friction surface (28), and a second type of recesses and/or grooves (42), which is generated by a material removing second manufacturing method, is provided in the second friction surface (34). In addition, the present invention relates to a disk clutch and brake (4) comprising such a disk (2) and a method for producing such a disk (2).

Claims

1. A disk (2) for a disk clutch or brake (4) comprising a first friction surface (28) and a second friction surface (34) facing away from the first friction surface (28), in which recesses and/or grooves (40, 42, 44) are provided, characterized in that a first type of recesses and/or grooves (40), which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, is provided in the first friction surface (28), and a second type of recesses and/or grooves (42), which is generated by a material-removing second manufacturing method, is provided in the second friction surface (34).

2. The disk (2) according to claim 1, characterized in that the first type of recesses and/or grooves (40) is generated by stamping and/or the second type of recesses and/or grooves (42) is generated by a mechanical manufacturing method, preferably by milling.

3. The disk (2) according to claim 1, characterized in that the first type of recesses and/or grooves (40) has a shallower depth than the second type of recesses and/or grooves (42).

4. The disk (2) according to claim 1, characterized in that the first and/or second friction surface (28; 34) of a friction lining (30; 32) fixed on a friction lining carrier (20) is/are preferably formed as a paper friction lining, wherein the friction lining (30; 32) is particularly preferably glued on the friction lining carrier (20) and/or, optionally while generating an interspersed third type of recesses and/or grooves (44), is fixed on the friction lining carrier (20) in a segmented way.

5. The disk (2) according to claim 1, characterized in that the first friction surface (28) has no recesses and/or grooves (42) of the second type and/or the second friction surface (34) has no recesses and/or grooves (40) of the first type, wherein particularly preferably only the first type of recesses and/or grooves (40), preferably together with the third type of recesses and/or grooves (44), is provided in the first friction surface (28), and/or particularly preferably only the second type of recesses and/or grooves (42), preferably together with the third type of recesses and/or grooves (44), is provided in the second friction surface (34).

6. A disk clutch or brake (4), preferably a wet-running disk clutch or brake (4), particularly preferably a hydraulically actuatable disk clutch or brake (4), comprising a first disk set (62), which is connected rotationally fixed to a first disk carrier (48), and comprising a second disk set (64), which is connected rotationally fixed to a second disk carrier (54), wherein the disks (2, 66) of the two disk sets (62, 64) may be brought into frictional engagement with each other via friction surfaces, characterized in that the first and/or second disk set (62; 64) has at least one disk (2) according to claim 1.

7. The disk clutch or brake (4) according to claim 6, characterized in that the disks (66) of the second disk set (64) have friction surfaces provided with no recesses and/or grooves, wherein the first friction surfaces (28) of the disks (2) of the first disk set (62) preferably face in a first axial direction (6) of the disk clutch (4) and the second friction surfaces (34) of the disks (2) of the first disk set (62) face in a second axial direction (8), opposite the first axial direction (6), of the disk clutch (4).

8. A method for producing a disk (2), in particular a disk (2) according to claim 1, comprising the method steps providing a disk comprising a first friction surface (28) and a second friction surface (34) facing away from the first friction surface (28), generating a first type of recesses and/or grooves (40) in the first friction surface (28) by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, preferably by stamping, and generating a second type of recesses and/or grooves (42) in the second friction surface (34) by a material-removing second manufacturing method, preferably by a mechanical manufacturing method, particularly preferably by milling.

9. The method according to claim 8, in which the provision of the disk comprises the provision of a friction lining carrier (20) and the fixing of a friction lining (30), optionally a paper friction lining, on the friction lining carrier (20) to form the first friction surface (28) and/or the fixing of a friction lining (32), optionally a paper friction lining, on the friction lining carrier (20) to form the second friction surface (34), wherein the fixing of the friction lining (30) to form the first friction surface (28) is carried out preferably simultaneously or chronologically overlapping with the generation of the first type of recesses and/or grooves (40) in the first friction surface (28), and/or the fixing of the friction lining (30; 32) to form the first and/or second friction surface (28; 34) preferably comprises the fixing of a segmented friction lining (30; 32) to generate an interspersed third type of recesses and/or grooves (44).

10. The method according to claim 8, in which the first type of recesses and/or grooves (40) is generated simultaneously and or chronologically overlapping with the second type of recesses and/or grooves (42), and/or the first type of recesses and/or grooves (40) is generated with a shallower depth than the second type of recesses and/or grooves (42), and/or no recesses and/or grooves (42) of the second type are provided in the first friction surface (28), and/or no recesses and/or grooves (40) of the first type are generated in the second friction surface (34), wherein particularly preferably only the first type of recesses and/or grooves (40), preferably together with the third type of recesses and/or grooves (44), is generated in the first friction surface (28), and/or particularly preferably only the second type of recesses and/or grooves (42), preferably together with the third type of recesses and/or grooves (44), is generated in the second friction surface (34).

Description

[0024] The invention will be subsequently described in greater detail with the aid of an exemplary embodiment with reference to the appended drawings. As shown in:

[0025] FIG. 1 a front view of one embodiment of a disk,

[0026] FIG. 2 a rear view of the disk from FIG. 1,

[0027] FIG. 3 a partial side view of a disk clutch with at least one disk according to FIGS. 1 and 2 in a sectional depiction.

[0028] FIGS. 1 and 2 show a disk 2 in a front or rear view for a disk clutch 4, to be described later with reference to FIG. 3. Even if a disk clutch 4 is consistently discussed herein, the subsequent embodiments also apply in a corresponding way to a disk brake.

[0029] In the figures, opposite axial directions 6, 8, opposite radial directions 10, 12, and opposite circumferential directions 14, 16 of disk 2 or of disk clutch 4 are indicated by means of corresponding arrows, wherein disk 2 or disk clutch 4 has an axis of rotation 18 extending in axial directions 6, 8, about which disk 2 or disk clutch 4 is rotatable, so that circumferential directions 14, 16 may also be designated as directions of rotation.

[0030] Disk 2 is designed as a friction lining disk, stated more precisely as a disk 2 provided with a friction lining on both sides. Thus, disk 2 has a friction lining carrier 20, designed as an annular disk shape, which may be designed as a steel or sheet metal part. Friction lining carrier 20 has an outer edge 22 facing outward in radial direction 10 and an inner edge 24 facing inward in radial direction 12. A rotary driving contour 26 is provided on inner edge 24, in this case in the shape of an inner toothing. Consequently, depicted disk 2 is an inner disk. Alternatively, however, rotary driving contour 26 might also be provided on outer edge 22 or friction lining carrier 20, so that it might be an outer disk.

[0031] On the side facing the viewer of FIG. 1 and in axial direction 6, disk 2 has a first friction surface 28, which is formed from a friction lining 30 fixed on the side of friction lining carrier 20 facing in axial direction 6. A friction lining 32 is likewise fixed on the side of friction lining carrier 20 facing in axial direction 8, which functions to form a second friction surface 34 of disk 2 facing away from first friction surface 28 and in axial direction 8, as this is gathered from FIG. 2. The two friction linings 30, 32 are paper friction linings, which are additionally glued to friction lining carrier 20. Two friction surfaces 28, 34 are additionally delimited outwardly in radial direction 10 by an outer edge 36 and inwardly in radial direction 12 by an inner edge 38, which are designed as extending circumferentially substantially in circumferential direction 14, 16. Outer edge 36 thereby substantially corresponds with outer edge 22 of friction lining carrier 20 or is at most set back marginally inwardly in radial direction 12 with respect to outer edge 22. In contrast, inner edge 38 is set back outwardly in radial direction with respect to inner edge 24 of friction lining carrier 20, in this case, preferably set back farther than is the case for outer edge 36 with respect to outer edge 22.

[0032] A first type of recesses and/or grooves 40 is provided in first friction surface 28. First type of recesses and/or grooves 40, which preferably form a groove pattern in a grid or honeycomb shape, was generated by a material shaping first manufacturing method, and thus not by a material removing manufacturing method. It is hereby preferred if first type of recesses and/or grooves 40 is generated by stamping. Thus, first type of recesses and/or grooves 40 may, for example, be generated simultaneously with the gluing of friction lining 30 to friction lining carrier 20; however, first type of recesses and/or grooves 40 might also have been stamped after friction lining 30 was fixed on friction lining carrier 20. Alternatively, the first manufacturing method may also be a material casting first manufacturing method, in which the provided friction lining 30 had already been provided with first type of recesses and/or grooves 40 during production of the same.

[0033] In contrast, a second type of recesses and/or grooves 42 is provided in second friction surface 34. Second type of recesses and/or grooves 42 again form a groove pattern, which is formed as grid or honeycomb shaped and corresponds in its dimensioning substantially to the groove pattern of first type of recesses and/or grooves 40, as this may be gathered from FIG. 2. Second type of recesses and/or grooves 42 is, in contrast to first type of recesses and/or grooves 40, generated by a material-removing second manufacturing method. This may basically be any material-removing manufacturing method; however, it is preferred if this is a mechanical manufacturing method, like grinding. It is thereby particularly preferred if second type of recesses and/or grooves 42 is generated by milling. Even if it is not obvious from FIGS. 1 and 2, first type of recesses and/or grooves 40 has a shallower depth, thus a smaller extension in axial directions 6, 8, than second type of recesses and/or grooves 42.

[0034] As already previously explained, friction linings 30, 32 were fixed on friction lining carrier 20, wherein friction linings 30, 32 were fixed on friction lining carrier 20 in a segmented way. This is carried out by generating an interspersed third type of recesses and/or grooves 44, which are formed between friction lining segments 46 of respective friction lining 30 or 32 and extend substantially from inner edge 38 outward in radial direction 10 to an outer edge 36, wherein third type of recesses and/or grooves 44 is not only formed as continuous, but also has a groove bottom which is formed by friction lining carrier 20.

[0035] With respect to the structure of disk 2, it is thus initially maintained that first friction surface 28 has no recesses and/or grooves 42 of the second type, while second friction surface 34 has no recesses and/or grooves 40 of the first type. Instead, only recesses and/or grooves 40 of the first type, with the exception of recesses and/or grooves 44 of the third type, are provided in first friction surface 28, while only recesses and/or grooves 42 of the second type, with the exception of recesses and/or grooves 44 of the third type, are provided in second friction surface 34.

[0036] FIG. 3 shows disk clutch 4. Disk clutch 4 is designed as a wet-running disk clutch 4 and may be hydraulically actuated, even if a corresponding actuating piston or actuating element is omitted in the depiction in FIG. 3. Disk clutch 4 has a first disk carrier 48, which is designed here as an inner disk carrier. First disk carrier 48 has a first disk carrier section 50 extending substantially in axial directions 6, 8, which is provided with a first rotary driving contour 52 facing outward in radial direction 10 and extending in circumferential direction 14, 16. A second disk carrier 54, which is additionally assigned to first disk carrier 48, is designed in this case as an outer disk carrier, and has a second disk carrier section 56, which likewise extends substantially in axial directions 6, 8, and is arranged nested with first disk carrier section 50 in radial direction 10, 12. Second disk carrier section 56 has a second rotary driving contour 58 facing inward in radial direction 12 and extending in circumferential direction 14, 16. The two rotary driving contours 52, 58 are preferably designed as toothings.

[0037] A disk set 60 is arranged in radial direction 10, 12 between two disk support sections 50, 56. Disk set 60 has a first disk set 62, wherein the disks of first disk set 62 are formed from disks 2 described with reference to FIGS. 1 and 2. Thus, rotary driving contours 26 of disks 2 of first disk set 62 are in rotary driving engagement with first rotary driving contour 52 of disk support section 50 of first disk carrier 48; however, are displaceable in axial direction 6, 8 relative to first disk carrier 48. In addition, disk set 60 has a second disk set 64, whose disks 66 are designed as outer disks and are in rotary driving engagement with second rotary driving contour 58 of second disk carrier 54, wherein disks 66 are displaceable in axial direction 6, 8 relative to second disk carrier 54. Disks 2 of first disk set 62 and disks 66 of second disk set 64 are arranged in such a way that these follow one another alternatingly in axial direction 6, 8, wherein disks 66 of second disk set 64 are designed as disks or steel disks without a friction lining. Consequently, disks 2 of first disk set 62 and disks 66 of second disk set 64 may be brought into frictional engagement with each other via friction surfaces facing each other through the compression of disk set 60. While disks 2 of first disk set 62 have recesses and/or grooves 40, 42, 44, previously described in greater detail, in first and second friction surfaces 28, 34, no recesses and/or grooves are provided in the corresponding friction surfaces in disks 66 of second disk set 64. First friction surfaces 28 of disks 2 of first disk set 62 also face in axial direction 6 of disk clutch 4, while their second friction surfaces 34 face in axial direction 8, opposite to axial direction 6, of disk clutch 4.

[0038] In the context of producing disks 2 according to FIGS. 1 through 3, the procedure is as follows. A disk 2 is initially provided with a first friction surface 28 and a second friction surface 34, which faces away from first friction surface 28. In the depicted embodiment, the provision of disk 2 comprises the provision of friction lining carrier 20 and the fixing of friction linings 30, 32, optionally of paper friction linings, on friction lining carrier 20 to form first friction surface 28 and second friction surface 34.

[0039] In addition, first type of recesses and/or grooves 40 are generated in first friction surface 28 by a material shaping and/or material casting and/or non-material removing first manufacturing method, preferably by stamping. It has hereby proven advantageous, if the fixing of friction lining 30 to form first friction surface 28 is carried out simultaneously or chronologically overlapping with the generation of first type of recesses and/or grooves 40 in first friction surface 28. Thus, friction lining segments 46 of friction lining 30 might be compressed or pressed on the side of friction lining carrier 20 facing in axial direction 6 with an intermediate layer of adhesive, wherein the stamp or the like used for this purpose might have a corresponding contour which simultaneously generates first type of recesses and/or grooves 40 in corresponding friction lining segment 46, preferably by stamping.

[0040] In addition, second type of recesses and/or grooves 42 is generated in second friction surface 34 by a material-removing second manufacturing method, preferably by a mechanical manufacturing method, particularly preferably by milling. In this case, the manufacturing method may also be accelerated, if first type of recesses and/or grooves 40 is generated simultaneously or chronologically overlapping with second type of recesses and/or grooves 42, in that, for example, first type of recesses and/or grooves 40 is generated in friction lining 30 in the previously described way, while the material-removing second manufacturing method for generating second type of recesses and/or grooves 42 in second friction surface 34 formed by friction lining 32 is carried out simultaneously or chronologically overlapping.

[0041] In addition, first type of recesses and/or grooves 40 should be generated with a shallower depth than second type of recesses and/or grooves 42, wherein no recesses and/or grooves 42 of the second type should be generated in first friction surface 28as already previously explainedand/or no recesses and/or grooves 40 of the first type should be generated in second friction surface 34. In order to thereby simplify the manufacturing method even farther, only recesses and/or grooves 40, 44 of the first and third type should be generated in first friction surface 28 and only recesses and/or grooves 42, 44 of the second and third type should be generated in second friction surface 34. As already previously discussed, recesses and/or grooves 44 of the third type are thereby generated in an advantageous way by fixing respective friction lining 30 or 32 on friction lining carrier 20 in a segmented way.

REFERENCE NUMERALS

[0042] 2 Disk [0043] 4 Disk clutch [0044] 6 Axial direction [0045] 8 Axial direction [0046] 10 Radial direction [0047] 12 Radial direction [0048] 14 Circumferential direction [0049] 16 Circumferential direction [0050] 18 Axis of rotation [0051] 20 Friction lining carrier [0052] 22 Outer edge [0053] 24 Inner edge [0054] 26 Rotary driving contour [0055] 28 First friction surface [0056] 30 Friction lining [0057] 32 Friction lining [0058] 34 Second friction surface [0059] 36 Outer edge [0060] 38 Inner edge [0061] 40 First type of recesses and/or grooves [0062] 42 Second type of recesses and/or grooves [0063] 44 Third type of recesses and/or grooves [0064] 46 Friction lining segment [0065] 48 First disk carrier [0066] 50 First disk support section [0067] 52 First rotary driving contour [0068] 54 Second disk carrier [0069] 56 Second disk support section [0070] 58 Second rotary driving contour [0071] 60 Disk set [0072] 62 First disk set [0073] 64 Second disk set [0074] 66 Disks