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Hydrodynamic bearing device, motor and disc driving apparatus

A fluid bearing and generating device technology, which is applied in the field of disc drive devices and motors, and can solve problems that hinder the miniaturization, weight reduction and thinning of dynamic pressure fluid bearing devices

Inactive Publication Date: 2006-02-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, these problems become factors that hinder the miniaturization, weight reduction, and thinning of the dynamic pressure fluid bearing device and the motor for the disk drive device.

Method used

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  • Hydrodynamic bearing device, motor and disc driving apparatus
  • Hydrodynamic bearing device, motor and disc driving apparatus
  • Hydrodynamic bearing device, motor and disc driving apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0091] Reference is made to a motor for a disk drive using the hydrodynamic fluid bearing device according to the first embodiment of the present invention figure 1 Be explained. figure 1 It is a cross-sectional view showing the structure of a motor for a disk drive device using a hydrodynamic fluid bearing device in the first embodiment. Also, since the hydrodynamic fluid bearing device in the first embodiment has a substantially bilaterally symmetrical shape, the figure 1 It is shown as a cross-sectional view of the right half.

[0092] exist figure 1Among them, the rotating shaft 10 is inserted into the bearing hole 11a of the sleeve 11 so as to be relatively rotatable. A disk-shaped thrust plate 16 extending in a direction orthogonal to the central axis is disposed on the lower side of the rotating shaft 10 . The thrust plate 16 is accommodated in the recess 11e formed in the sleeve 11, and can hold the sleeve 11 in rotation. The lower end of the rotating shaft 10...

no. 2 Embodiment approach

[0116] Referring to the motor for disk drive device using the dynamic pressure fluid bearing device in the second embodiment of the present invention image 3 and Figure 4 Be explained. image 3 It is a cross-sectional view of the right half of the configuration of the motor for the disk drive device using the dynamic pressure fluid bearing device in the second embodiment of the present invention, Figure 4 It is a plan view showing the rotating shaft and the sleeve as the bearing portion of the motor for a disk drive device in the second embodiment of the present invention. exist image 3 and Figure 4 In the description, those having the same functions and configurations as those of the first embodiment described above are given the same reference numerals and their descriptions are omitted.

[0117] The disc drive motor using the dynamic pressure fluid bearing device in the second embodiment differs from the disc drive motor in the first embodiment in the sleeve config...

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Abstract

An object of the present invention is to provide a hydrodynamic bearing device having a high reliability which can achieve miniaturization and reduction of weight and thickness, and a motor and a disc driving apparatus using the same. In the hydrodynamic bearing device according to the present invention, a sleeve through which a shaft penetrates has a first opposing surface substantially orthogonal to a central axis of the shaft at one end and has a second opposing surface at the other end. A thrust plate having a disc shape which is fixed near one end of the shaft or which is integrally formed with the shaft is positioned so as to oppose the first opposing surface of the sleeve. A seal plate positioned near the other end of the shaft is positioned with a gap to the second opposing surface of the sleeve.

Description

technical field [0001] The present invention relates to a dynamic pressure fluid bearing device utilizing dynamic pressure of fluid used in a motor for rotating a disk-shaped recording medium, a motor using the dynamic pressure fluid bearing device, and a disk drive device. Background technique [0002] In recent years, the storage capacity of disk drives that rotate disk-shaped recording media such as magnetic disks, optical disks, and magneto-optical disks has increased, and the data transfer speed has also tended to increase. Therefore, as a bearing device using a motor of such a disk drive device, a hydrodynamic bearing device capable of holding a shaft rotationally driven at a high speed with high precision is used. [0003] In a general dynamic pressure fluid bearing device, a lubricant, that is, lubricating oil as a working fluid, is filled between the outer peripheral surface of the rotating shaft and the inner peripheral surface of the holding part that holds the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/10H02K5/167G11B19/20
CPCH02K5/1677F16C33/103F16C2370/12
Inventor 桐山博之吉嗣孝雄浅田隆文斋藤浩昭
Owner PANASONIC CORP