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Dynamic pressure bearing device, method of manufacturing the same, and motor using the same

A technology for dynamic pressure bearings and bearing housings, applied in the direction of sliding contact bearings, bearings for rotational motion, rigid supports for bearing components, etc.

Active Publication Date: 2008-03-19
NIDEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] An object of the present invention is to solve the above-mentioned problems due to the expansion deformation of the fixing surface of the outer circumference of the bearing housing, to ensure the stability of the fixed state between the bearing housing and the holding member, and to be able to obtain the required fixing strength

Method used

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  • Dynamic pressure bearing device, method of manufacturing the same, and motor using the same
  • Dynamic pressure bearing device, method of manufacturing the same, and motor using the same
  • Dynamic pressure bearing device, method of manufacturing the same, and motor using the same

Examples

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Embodiment Construction

[0045] Embodiments of the present invention are described below.

[0046] FIG. 1 shows an example of the structure of a spindle motor of an information processing apparatus equipped with a dynamic pressure bearing device 1 according to this embodiment. This spindle motor is used on a disk drive device such as an HDD, and includes: a disk hub 3 serving as a rotor, a dynamic pressure bearing device 1 for supporting the rotation of the disk hub 3, and a thrust member for holding the dynamic pressure bearing device 1. The frame 6 of the pressure bearing device 1, and the stator 4 and the rotor magnet 5 are arranged between the disk center 3 and the frame 6 and are opposed to each other with a predetermined gap provided therebetween. In this embodiment, the magnetic disk center 3 is mounted on the shaft member 2 of the dynamic pressure bearing device 1 . The stator 4 is attached to the outer circumference of the frame 6, the rotor magnet 5 is attached to the inner circumference of...

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PUM

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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.

Description

[0001] This application is a divisional application of the Chinese invention patent application with the application date of November 26, 2003, the title of the invention is "dynamic pressure bearing device, its manufacturing method, and a motor using the bearing device", and the application number is 200310115470.4. technical field [0002] 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/10F16C33/10F16C33/14F16C35/02H02K21/22H02K7/08F16C43/02
Inventor 玉冈健人中岛良一栗村哲弥
Owner NIDEC CORP
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