Rotating device
AssigneeSamsung Electro-Mechanics Japan Advanced Tech. Co. Ltd.
InventorsTakashi IKEDA, Hiroshi IWAI
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Abstract
A rotating device includes a shaft body including a portion extending in an axial direction, and a bearing body which retains a part of the shaft body, is relatively rotatable to the shaft body, and is provided with a groove formed part having an inner circumference formed with a fluid dynamic pressure generating groove. The bearing body includes, at the groove formed part, a slanted plating layer having a plating thickness gradually becoming thick toward an external side in the axial direction.
Claims20
A rotating device comprising:
- a shaft body including a portion extending in an axial direction;
- and
- a bearing body which retains a part of the shaft body, is relatively rotatable to the shaft body, and is provided with a groove formed part having an inner circumference formed with a fluid dynamic pressure generating groove,
- wherein the bearing body comprises, at the groove formed part, a slanted plating layer having a plating thickness gradually becoming thick toward an external side in the axial direction.
A rotating device comprising:
- a shaft body including a portion extending in an axial direction;
- and
- a bearing body which retains a part of the shaft body, is relatively rotatable to the shaft body, and is provided with a groove formed part having an inner circumference formed with a fluid dynamic pressure generating groove,
- wherein the bearing body comprises, at the groove formed part, a slanted plating layer having a plating thickness gradually becoming thick toward an internal side in the axial direction.
A rotating device comprising:
- a shaft body including a portion extending in an axial direction;
- and
- a bearing body which retains a part of the shaft body, is relatively rotatable to the shaft body, and is provided with a groove formed part having an inner circumference formed with a fluid dynamic pressure generating groove,
- wherein:
- the bearing body comprises, at the groove formed part, a slanted plating layer having a plating thickness gradually becoming thick toward a first direction in the axial direction;
- a difference between a maximum plating thickness of the slanted plating layer and a minimum plating thickness thereof is within a range between equal to or greater than 0.1 μm and equal to or smaller than 0.5 μm;
- and
- the fluid dynamic pressure generating groove is engraved in an external surface side of the slanted plating layer.
Dependencies are inferred from the claim text.