Fluid bearing device

A technology of fluid bearings and bearing sleeves, applied in bearings, electromechanical devices, bearing components, etc., can solve problems such as high production prices of metal products, damage to surrounding equipment, and static electricity cannot be eliminated, so as to maintain good fluidity, reduce labor, and improve The effect of job stability
CN1764792AActive Publication Date: 2006-04-26NTN CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NTN CORP
Publication Date
2006-04-26

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Abstract

The invention relates to a fluid bearing device, which can realize cost reduction and prevent itself from being charged by static electricity. A bearing sleeve is provided inside the housing, and the shaft member is inserted into the bearing sleeve. A pressure is generated in a bearing gap between the inner surface of the bearing housing and the outer peripheral surface of the shaft member by the dynamic pressure of the lubricating oil to radially support the shaft member in a non-contact state with the bearing housing. The shaft end of the shaft member is in contact with the bottom of the case, which is formed of a conductive resin compound mixed with carbon nanofibers, and whose volume resistivity is set to be 106 Ω·cm or less to conduct electricity.
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Description

technical field

[0001] The present invention relates to a fluid bearing device which supports a rotating part in a non-contact manner via a lubricating oil film formed within a radial bearing gap; the invention also relates to a dynamic bearing device (hydrodynamic bearing device) which The device supports rotating parts in a non-contact manner by means of the dynamic pressure effect of lubricating oil generated within the bearing gap. These bearing units are suitable for use in information processing equipment including: spindle motors for magnetic disk devices such as HDD and FDD; spindle motors for optical disk devices such as CD-ROM, CD-R / RW, DVD-ROM / RAM; and Spindle motors used in magneto-optical disc devices such as MD and MO; polygon scanner motors used in laser printers (LBP); or small motors used in electrical equipment such as axial fans. Background technique

[0002] In each of the above motors, in addition to high rotational accuracy, other desirable performance...

Claims

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