Thin-walled ring bearing and computed tomography apparatus having such thin-walled ring bearing

Abstract

The present invention relates to a thin-walled ring bearing (1) particularly for a computed tomography apparatus, comprising at least one outer ring (2a, 2b), at least one inner ring (3a, 3b), and a plurality of spherical rolling elements (4), wherein at least one inner ring (3a, 3b) has an inner diameter (D i ) formed to be larger than 700 mm, at least one inner ring (3a, 3b) and at least one outer ring (2a, 2b) are formed from an uncured metal base material (6) having a hardness of less than 60 HRC, at least one inner ring (3a, 3b) and at least one outer ring (2a, 2b) each form a raceway surface (5), and the base material (6) is at least partially covered in the region of the raceway surface (5) by a functional layer (7) having a functional layer thickness in the range of 0.5 to 3 mm, and the functional layer (7) is formed from a metal functional layer material having a hardness of at least 60 HRC. The present invention relates to a thin-walled ring bearing (1).

Claims

1. A thin-walled ring bearing (1) comprising at least one outer ring (2a, 2b), at least one inner ring (3a, 3b), and a plurality of spherical rolling elements (4), wherein the at least one inner ring (3a, 3b) is formed with an inner diameter (Di) greater than 700 mm, and the at least one inner ring (3a, 3b) and the at least one outer ring (2a, 2b) are formed from an uncured metal substrate (6) having a hardness of less than 60 HRC, and the at least one inner ring (3a, 3b A thin-walled ring bearing (1), wherein the base material (6) and at least one outer ring (2a, 2b) each form a raceway bearing surface (5), and the base material (6) is at least partially covered in the region of the raceway bearing surface (5) with a functional layer (7) having a functional layer thickness in the range of 0.5 to 3 mm, the functional layer (7) is formed from a metallic functional layer material having a hardness of at least 60 HRC, and the functional layer thickness of the functional layer (7) decreases toward its periphery in the contact region with the rolling element in a direction perpendicular to the raceway bearing surface (5).

2. The thin-walled ring bearing (1) according to claim 1, wherein the metal substrate (6) is formed from steel.

3. The thin-walled ring bearing (1) according to claim 1 or 2, wherein the metallic functional layer material is formed from steel of DIN 1.3344 (X 130 WMoCrV 6-5-4-3) or from a hard metal based on tungsten carbide in a nickel-bonded matrix.

4. The thin-walled ring bearing (1) according to claim 1, wherein the functional layer (7) is applied to the substrate (6) by laser metal deposition, thereby forming a wavy transition region between the substrate (6) and the functional layer (7) when viewed in cross-section.

5. The thin-walled ring bearing (1) according to claim 1, wherein the free surface (8) of the functional layer (7) that forms a raceway for the rolling element (4) is reworked by machining and / or roller burnished.

6. The thin-walled ring bearing (1) according to claim 1, wherein the at least one outer ring (2a, 2b) and / or the at least one inner ring (3a, 3b) is heat-treated.

7. The thin-walled ring bearing (1) according to claim 1, wherein the raceway bearing surface (5) is covered with the functional layer (7) only in the contact area with the rolling element (4).

8. A thin-walled ring bearing (1) according to claim 1, comprising two outer rings (2a, 2b) and / or two inner rings (3a, 3b).

9. A computed tomography apparatus comprising at least one thin-walled ring bearing (1) as described in claim 1.

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