Dynamic pressure bearing, mfg method and motor using same

A technology of dynamic pressure bearing and bearing seat, which is used in sliding contact bearings, rotating bearings, bearings, etc.
CN1502828AActive Publication Date: 2004-06-09NIDEC CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NIDEC CORP
Publication Date
2004-06-09

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Abstract

A securing surface of a housing comprises a deformation region, which deforms radially outward by a predetermined quantity during press fitting of a thrust member, and another region. The deformation region has a tapered shape that gradually reduces in diameter in the downward direction, and is receded radially inward relative to the other region of the securing surface, by an amount equivalent to the amount of outward deformation thereof during press fitting. When the thrust member is press fitted into the inner periphery of a press fitting portion of the housing, the securing surface of the housing becomes substantially straight along entire axial region L thereof.
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Description

technical field

[0001] The present invention relates to a dynamic pressure bearing device rotatably supported in a non-contact manner by the dynamic pressure action of lubricating oil generated in a bearing gap, its manufacturing method, and a motor using the bearing device Shaft element. The bearing unit is suitable for use in information processing equipment, including magnetic disc units such as HDD and FDD, optical disc units for CD-ROM, CD-R / RM, DVD-ROM / RAM, etc., and for MD, MO, etc. The spindle motor of a magneto-optical disk device, the multi-sided scanner motor in a laser beam printer (LBP), or a small motor for an electric device such as an axial fan. Background technique

[0002] Among the various motors described above, performances such as high speed, low cost, and low noise generation are required in addition to high rotational accuracy. One of the structural components that determine these performance requirements is the bearings that support the motor shaft...

Claims

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