SLIDING BEARING AND METHOD FOR PRODUCING A BEARING ELEMENT FOR A SLIDING BEARING

Abstract

The present disclosure relates to a sliding bearing comprising a first bearing element and a second bearing element. The first bearing element is coated in multiple layers. An inner layer is deposited on a base material of the first bearing element by means of a vapor deposition method. The inner layer has a structure, and an outer layer designed as a PTFE impregnation layer leveling the structure of the inner layer. The second bearing element is formed of PTFE fiber-reinforced plastic or has a PTFE-containing sliding lining.

Claims

1-10. (canceled)

11. A sliding bearing, comprising: a first bearing element including: a first surface; a coating including: a vapor deposition inner layer covering the first surface; and, an outer layer: including polytetrafluoroethylene (PTFE); and, covering the vapor deposition inner layer; and, a second bearing element including: a second surface; and, a layer, including PTFE, glued to the second surface and in contact with the outer layer of the first bearing surface.

12. The sliding bearing of claim 11, wherein the vapor deposition inner layer includes an amorphous carbon.

13. The sliding bearing of claim 12, wherein the amorphous carbon includes at least one doping element.

14. The sliding bearing of claim 12, wherein the amorphous carbon includes metallic and non-metallic doping elements.

15. The sliding bearing of claim 12, wherein the amorphous carbon is free of hydrogen.

16. The sliding bearing of claim 11, wherein the vapor deposition inner layer includes a metal.

17. The sliding bearing of claim 11, wherein the vapor deposition inner layer includes at least one hard material selected from the group consisting of nitridic hard materials, carbidic hard materials, and oxidic hard materials.

18. The sliding bearing of claim 11, wherein the vapor deposition inner layer includes at least one hard material selected from the group consisting of titanium, aluminum, chromium, and molybdenum.

19. The sliding bearing of claim 11, wherein the layer of the second bearing element includes PTFE fiber-reinforced plastic.

20. The sliding bearing of claim 11, wherein the layer of the second bearing element includes: a PTFE fabric in a resin matrix; or, a metal-polymer composite material including sintered bronze and PTFE.

21. The sliding bearing of claim 11, wherein: the first surface includes a first plurality of depressions; the vapor deposition inner layer conforms to the first surface and includes a second plurality of depressions in contact with the first plurality of depressions; and, the outer layer fills the second plurality of depressions and forms a smooth outer surface of the first bearing element.

22. A sliding bearing, comprising: a first bearing element including: a first surface; a coating including: a vapor deposition inner layer covering the first surface and including an amorphous carbon; and, an outer layer: including polytetrafluoroethylene (PTFE); and, covering the vapor deposition inner layer; and, a second bearing element including: a second surface; and, a layer, including PTFE, glued to the second surface and in contact with the outer layer of the first bearing element.

23. The sliding bearing of claim 22, wherein the amorphous carbon: includes metallic and non-metallic doping elements; or, is free of hydrogen.

24. The sliding bearing of claim 22, wherein the vapor deposition inner layer includes: a metal; or, at least one hard material selected from the group consisting of nitridic hard materials, carbidic hard materials, and oxidic hard materials; or, at least one hard material selected from the group consisting of titanium, aluminum, chromium, and molybdenum.

25. The sliding bearing of claim 22, wherein the layer of the second bearing element includes: a PTFE fiber-reinforced plastic; or, a PTFE fabric in a resin matrix; or, a metal-polymer composite material including sintered bronze and PTFE.

26. A method of fabricating a sliding bearing, comprising: applying, using vapor deposition, an inner layer of a coating to a first surface of a first bearing element; applying an outer layer, including polytetrafluoroethylene (PTFE), of the coating over the inner layer; gluing a layer, including PTFE, to a surface of a second bearing element; and, contacting the outer layer of the coating with the layer of the second bearing element.

27. The method of claim 26, wherein applying, using vapor deposition, the inner layer of the coating to the first surface of the first bearing element includes applying: an amorphous carbon to the first surface of the first bearing element; or, a metal to the first surface of the first bearing element; or, at least one hard material selected from the group consisting of nitridic hard materials, carbidic hard materials, and oxidic hard materials to the first surface of the first bearing element; or, at least one hard material selected from the group consisting of titanium, aluminum, chromium, and molybdenum to the first surface of the first bearing element.

28. The method of claim 27, wherein: applying, using vapor deposition, the inner layer of the coating to the first surface of the first bearing element includes applying the amorphous carbon to the first surface of the first bearing element; and, applying the amorphous carbon to the first surface of the first bearing element includes applying: at least one doping element to the first surface of the first bearing element; or, metallic or non-metallic doping elements to the first surface of the first bearing element; or, the amorphous carbon free of hydrogen to the first surface of the first bearing element.

29. The method of claim 26, wherein gluing the layer including PTFE to the surface of the second bearing element includes gluing: a PTFE fiber-reinforced plastic to the surface of the second bearing element; or, a PTFE fabric in a resin matrix to the surface of the second bearing element; or, a metal-polymer composite material including sintered bronze and PTFE to the surface of the second bearing element.

30. The method of claim 26, wherein applying the outer layer, including PTFE, to the inner layer includes: filling depressions in the inner layer; and, forming, with the outer layer, a smooth outer surface of the first bearing element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the following, an exemplary embodiment of the invention is explained in more detail with drawings. In the figures:

[0029] FIG. 1 shows, in a schematic sectional representation, a sliding bearing according to the invention,

[0030] FIG. 2 shows, in a schematic representation, an enlarged representation of FIG. 1 in the area of the sliding contact,

[0031] FIG. 3 shows, in a representation analogous to FIG. 2, the detailed structure of the sliding bearing of the device according to FIG. 1.

DETAILED DESCRIPTION

[0032] Parts that correspond to each other or have basically the same effect are marked with the same reference symbols in all figures.

[0033] Sliding bearing 1 in FIG. 1, namely a pivot bearing, is formed from first, inner bearing element 2 and second, outer bearing element 3. Bearing element 2 has central opening 4 for connection to a connecting part (not shown). Bearing element 2 has coating 5 comprising inner layer 9 and outer layer 10 (see FIG. 3) on convex outer surface 8. Bearing element 3 has sliding lining 6 on concave inner surface 7.

[0034] FIG. 2 shows an enlarged section from FIG. 1 in the area of the sliding contact. Bearing element 2 is provided with coating 5 and Bearing element 3 is provided with sliding lining 6, which differ significantly from one another with regard to the hardness thereof. For example, coating 5 comprises inner layer 9 in the form of a hard material layer, whereas sliding lining 6, which is glued into second bearing element 3, contains, for example, a PTFE fabric in a resin matrix.

[0035] No chromium VI-containing electrolyte is required to produce sliding bearing 1 according to FIGS. 1 to 3. Rather, inner layer 9 is first deposited on the base material of Bearing element 2 by means of vapor deposition. The base material is designed to be metallic, for example made of steel. Inner layer 9 has a substantially uniform thickness. As a result, the surface of inner layer 9 adapts to the given structure of the base material, which has depressions 11 as structures.

[0036] After inner layer 9 has been deposited directly on the surface of the metallic base material of bearing element 2, a PTFE impregnation layer is applied to inner layer 9 as outer layer 10. Unevenness and depressions 11 of inner layer 9 present as structures 11 are leveled by the PTFE impregnation layer, so that a smooth, in the present case spherical, outer surface of bearing element 2 results.

[0037] In contrast to bearing element 2 coated in multiple layers, bearing element 3 is provided with sliding lining 6 which is glued on. For example, sliding lining 6 is formed from a PTFE fabric embedded in a resin matrix or from a metal-polymer composite material containing sintered bronze and PTFE. Overall, concave inner surface 7 of bearing element 3 is formed by sliding lining 6. Coating 5 of bearing element 2 forms convex outer surface 8 that contacts inner surface 7.

LIST OF REFERENCE SYMBOLS

[0038] 1 Sliding bearing, pivot bearing [0039] 2 Bearing element [0040] 3 Bearing element [0041] 4 Opening [0042] 5 Coating of the bearing element 2 [0043] 6 Sliding lining of the bearing element 3 [0044] 7 Concave inner surface [0045] 8 Convex outer surface [0046] 9 Inner layer [0047] 10 Outer layer [0048] 11 Structure, depression