Fluid dynamic bearing system
AssigneeMinebea Co., Ltd.
InventorOlaf Winterhalter
Life of this patent
Estimating the term…
Abstract
The invention relates to a fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bearing bush. According to the invention at least the outside circumference of a section of the shaft extending into the bearing bush is made of a plastic material. As an alternative, a film made of a plastic material whose thickness is less than the width of the bearing gap can be disposed in the bearing gap.
Claims11
A fluid dynamic bearing system used particularly for a spindle motor having a shaft (1) that is accommodated in a bearing bush (2) and rotatably supported with respect to the bearing bush, a bearing gap (11) filled with a bearing fluid being located between the shaft and the bearing bush,
- characterized in that,
- at least the outside circumference of a section of the shaft (1) extending into the bearing bush is made of a plastic material or sheathed with plastics (10).
A fluid dynamic bearing system used particularly for a spindle motor having a shaft (1) that is accommodated in a bearing bush (2) and rotatably supported with respect to the bearing bush, a bearing gap (11) filled with a bearing fluid being located between the shaft and the bearing bush,
- characterized in that
- a film (13) made of a plastic material whose thickness is less than the width of the bearing gap is disposed in the bearing gap (11).
Dependencies are inferred from the claim text.