Corner thrust-journal fluid dynamic bearing
AssigneeSeagate Technology LLC
InventorsAnthony Joseph Aiello, Klaus Dieter Kloeppel
Life of this patent
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Abstract
A fluid dynamic bearing motor is provided comprising a an annular sleeve, a shaft disposed through the sleeve, a hub supported on a first end of the shaft, a journal between the sleeve and the shaft, and a fluid dynamic bearing in the journal, wherein the fluid dynamic bearing comprises an axial bearing and a radial bearing, the axial and radial bearings being formed on respectively angles surfaces to form one corner bearing.
Claims18
A fluid dynamic bearing motor comprising an inner and outer member defining a gap therebetween, and supported for relative rotation by a grooved corner bearing facing the gap comprising first and second adjacent grooved surfaces at an angle to each other at a corner, the grooved surfaces configured to pump fluid in the gap toward the corner.
A fluid dynamic bearing motor comprising a shaft having a first end adapted to be supported from a base, a thrust plate supported from or integrated with an end of the shaft distal from the first end, a hub supported for rotation over the shaft and thrust plate, and a fluid dynamic bearing between the thrust plate and the hub wherein the fluid dynamic bearing comprises a grooved journal bearing on an outer radial surface of the thrust plate and a grooved thrust bearing formed on an axially outer surface of the thrust plate, the grooved journal bearing and the grooved thrust bearing configured to pump fluid toward a corner.
A fluid dynamic bearing motor comprising a shaft from a first end adapted to be supported from a base, a thrust ring supported from a end of the shaft distal from the base and a hub supported for rotation relative to the shaft and thrust ring, and a fluid dynamic bearing between the thrust ring and the hub wherein the fluid dynamic bearing comprises a grooved journal bearing on an inner radial surface of the thrust ring and a grooved thrust bearing on an axial surface of the thrust ring, the grooved journal bearing and the grooved thrust bearing configured to pump fluid toward a corner.
A fluid dynamic bearing motor comprising a shaft having a first plate supported at or near a first end and a second plate supported at or near a second end, a hub supported for rotation relative to the shaft and plates, and a fluid dynamic bearing supporting the hub for rotation relative to the shaft, the fluid dynamic bearing comprising a journal bearing defined by grooves on one of the surfaces defining a gap between the shaft and the hub, and a thrust bearing defined on a surface between one of the first and second plates and the hub, the journal bearing and the thrust bearing being configured to pump fluid toward a corner.
A fluid dynamic bearing motor comprising a shaft adapted to be supported from a base, a conical bearing comprising first and second angled surfaces sloping away from the shaft and meeting at a corner distal from the shaft, a hub and a sleeve supported for rotation around the shaft and the conical bearing, each of the hub and the sleeve having a surface which cooperates at least in part with one of the angled surfaces of the cone to define a gap, fluid in the gap supporting the hub and sleeve for rotation around the shaft, each of the gaps defined by the angled surfaces and the facing surfaces of the hub and sleeve having grooves on at least one surface thereof to pump fluid toward the corner so that both of the angled surfaces are inclined relative to a spin axis of the hub and sleeve.
Dependencies are inferred from the claim text.