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Fluid bearing device and manufacturing method therefor

A fluid bearing, integrated technology, used in bearings, electromechanical devices, shafts and bearings, etc., can solve the problem of high processing costs, and achieve the effect of high cleanliness

Inactive Publication Date: 2011-09-28
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If only the high precision of the disk mounting surface is sought, high-precision processing of the disk mounting surface can be performed separately, but this will lead to high processing costs

Method used

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  • Fluid bearing device and manufacturing method therefor
  • Fluid bearing device and manufacturing method therefor
  • Fluid bearing device and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Embodiments of the present invention will be described below with reference to the drawings.

[0051] figure 1 A configuration example of a spindle motor for information equipment incorporating a fluid bearing device 1 according to an embodiment of the present invention is schematically shown. This spindle motor is used in a disk drive device such as an HDD, and includes a fluid bearing device (dynamic pressure bearing device) 1 that relatively rotatably supports a rotating member 3 having a shaft member 2 and a hub 10 in a non-contact manner. Stator coils 4 , rotor magnets 5 and brackets 6 facing each other with a gap. The stator coil 4 is mounted on the bracket 6 , and the rotor magnet 5 is fixed to the hub 10 via the yoke 12 . The bearing member 7 of the fluid bearing device 1 is fixed to the inner periphery of the bracket 6 . In addition, the hub unit 10 (not shown in the figure) holds one or a plurality of disks as information storage media. In the spindle mot...

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PUM

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Abstract

The invention provides a fluid bearing device with a hub part having high molding accuracy and dimensional stability and manufacturable at low cost. An annular gate (14) is formed at the portion of a cavity (15) corresponding to the lower end face (10c1) outer diameter end part of a flange part (10c), and a molten resin (P) is filled into the cavity (15) through the annular gate (14) to form the resin hub part (10). The hub part (10) molded by the injection molding comprises a radial resin orientation through all the periphery thereof. Furthermore, an annular gate trace (16) is formed at the lower end face (10c1) outer diameter end part of the flange part (10c) of the hub part (10).

Description

technical field [0001] The present invention relates to a fluid bearing device for supporting a shaft member so as to be relatively rotatable in the radial direction using a lubricating film of fluid generated in a radial bearing gap, a method for manufacturing the same, and a disk drive device including the fluid bearing device. Examples of the disk drive include magnetic disk drives such as HDD, optical disk drives such as CD-ROM, CD-R / RW, and DVD-ROM / RAM, and magneto-optical disk drives such as MD and MO. In addition, the fluid bearing device of the present invention can also be used as a small motor such as a multi-angle scanner motor of a laser printer (LBP), a color wheel motor of a projector, or a fan motor in information equipment other than a disk drive device. Background technique [0002] The various motors mentioned above are required to have higher speed, lower cost, lower noise, etc. in addition to high rotational accuracy. One of the constituent elements that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/14H02K5/16H02K21/14F16C17/10G11B19/20
Inventor 伊藤健二伊藤冬木
Owner NTN CORP
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