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Fluid bearing device and method of manufacturing same

A technology of fluid bearings and bearing sleeves, which is applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problems of adhesive spreading, insufficient adhesive amount, and unable to meet the fixing strength, etc., to prevent spreading and reduce the amount of spreading Effect

Active Publication Date: 2014-04-02
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, for the purpose of further improving the fixing strength, when the bearing sleeve is inserted into the inner circumference of the housing by pressing, it is easy to cause the adhesive to spread.
When this happens, the amount of adhesive that should be sandwiched between the housing and the bearing sleeve may be insufficient to satisfy the necessary fixing strength (bonding strength)
Moreover, the spreading adhesive may enter the thrust bearing gap and damage the bearing function of the thrust bearing part

Method used

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  • Fluid bearing device and method of manufacturing same
  • Fluid bearing device and method of manufacturing same
  • Fluid bearing device and method of manufacturing same

Examples

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0032] figure 1 A configuration example of a spindle motor for information equipment incorporating a fluid bearing device is conceptually shown. This spindle motor is used in a disk drive device such as an HDD, and includes a fluid bearing device 1 that rotatably supports a shaft member 2, a hub 3 fixed to the shaft member 2, and stator coils 4 facing each other with a gap in the radial direction, for example. And rotor magnet 5, and bracket 6. The stator coil 4 is installed on the outer periphery of the bracket 6 , and the rotor magnet 5 is installed on the inner periphery of the hub 3 . The housing 7 of the fluid bearing device 1 is mounted on the inner periphery of the bracket 6 . One or more (three in the illustration) disks D such as magnetic disks are held on the hub 3 . When the stator coil 4 is energized in the above structure, the rotor magnet 5 rotates under the ac...

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PUM

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Abstract

To increase fixation strength of a bearing sleeve with respect to a bottomed cylindrical housing, a fluid dynamic bearing device (1) is provided with a bottomed cylindrical housing (7), a bearing sleeve (8) fixed to an inner periphery thereof, and a shaft member (2) inserted along an inner periphery of the bearing sleeve (8). An adhesive pool (11) is provided between an inner peripheral surface (7a2) of a smaller diameter portion (7a) of the housing (7) and an outer peripheral surface (8d) of the bearing sleeve (8), which are opposed to each other. Further, an inner peripheral chamfer (7f) continuous with the adhesive pool (11) is provided on an inner peripheral portion of the housing (7), and a first tapered space (12) formed between the inner peripheral chamfer (7f) and the bearing sleeve (8) is sealed with an adhesive (13).

Description

technical field [0001] The present invention relates to a fluid bearing device and a method of manufacturing the same. Background technique [0002] The fluid bearing device is a device in which a member on the rotating side (for example, a shaft member) is rotatably supported with respect to a member on the stationary side by an oil film formed in a bearing gap. This fluid bearing device has the characteristics of high-speed rotation, high rotation accuracy, and low noise. In recent years, its characteristics have been effectively utilized, and it is suitable for use as a bearing device for electric motors mounted on various electrical equipment including information equipment. More specifically, In other words, it is suitable for use as a spindle motor of a magnetic disk device such as HDD or an optical disk device such as CD-ROM, CD-R / RW, DVD-ROM / RAM, etc., and a polygon scanner (Japanese original: Polygonsukyana) of a laser beam printer (LBP). ) Bearing devices for moto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/08F16C17/10F16C33/10F16C35/02F16C43/02
CPCF16C35/02F16C17/107F16C33/08F16C33/103F16C2370/12
Inventor 堀政治
Owner NTN CORP
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