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US 12,584,519 B2Granted
Double-row ball bearing
AssigneeSchaeffler Technologies AG & Co. KG
InventorsJohannes Bedenk, Vittal Murti
Life of this patent
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Abstract
A double-row ball bearing, in particular for adjusting the blades of a tail rotor of a helicopter, including an inner ring and an outer ring as the bearing rings, and balls rolling off between the bearing rings and designed to transmit axial forces between the bearing rings in both directions, the outer ring being tiltably supported in a housing part.
Claims12
A double-row ball bearing comprising:
- an inner ring and an outer ring, and balls which roll between the inner ring and outer ring and configured to transmit axial forces between the inner ring and outer ring in both axial directions, wherein the outer ring is tiltably mounted in a housing part,
- wherein the outer ring has two annular, mutually spaced, convexly curved surface sections defining sliding surfaces which describe one and the same spherical surface,
- wherein the housing part is configured as a housing ring coupled to the outer ring in a rotationally fixed manner, whereby during operation the inner ring can rotate freely relative to the outer ring, and
- further comprising a predetermined breaking element rotationally coupling the housing ring to the outer ring, the predetermined breaking element allowing limited tilting, between the outer ring and the housing ring, the predetermined breaking element configured to release a relative rotation between the outer ring and the housing part when a maximum torque acting between the inner ring and the outer ring is exceeded.
1 more element
A method comprising:
- providing a double-row ball bearing having an inner ring and an outer ring, and balls which roll between the inner ring and outer ring and configured to transmit axial forces between the inner ring and outer ring in both axial directions, wherein the outer ring is tiltably mounted in a housing part, and wherein the outer ring has two annular, mutually spaced, convexly curved surface sections defining sliding surfaces which describe one and the same spherical surface, wherein the housing part is configured as a housing ring coupled to the outer ring in a rotationally fixed manner, whereby during operation the inner ring can rotate freely relative to the outer ring, and further including a predetermined breaking element rotationally coupling the housing ring to the outer ring, the predetermined breaking element allowing limited tilting, between the outer ring and the housing ring, the predetermined breaking element configured to release a relative rotation between the outer ring and the housing part when a maximum torque acting between the inner ring and the outer ring is exceeded;
- and
- using the double-row ball bearing in a tail rotor of a helicopter which has a blade adjustment system.
Dependencies are inferred from the claim text.