Bearing device

A bearing device and ball bearing technology, applied in the field of bearing devices, can solve the problems of large outer diameter, high processing cost, high material cost, and many cutting parts, etc., and achieve the effect of reducing the outer diameter, reducing the material cost, and improving the function

Inactive Publication Date: 2011-08-03
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the outer diameter of the rod material used to manufacture the shaft is large, so there are many cutting parts, and the processing cost and material cost are still high

Method used

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Examples

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Embodiment Construction

[0022] (structure)

[0023] Figure 1A and Figure 1B Shown is a pivot assembly bearing device 1 as a bearing device according to an embodiment. The pivot assembly bearing device 1 is used for swingably supporting a rocker arm mounted with a magnetic head for reading and writing information in a hard disk drive. The pivot unit bearing device 1 is used by being fitted into a through hole of a not-shown rocker block (E block).

[0024] The pivot unit bearing device 1 includes a shaft 2 . The shaft 2 is rotatably held by a pair of ball bearings 6 and 7 . That is, the ball bearing 6 holds the rolling elements 12 between the inner ring 8 and the outer ring 10 , and the ball bearing 7 holds the rolling elements 13 between the inner ring 9 and the outer ring 11 . Furthermore, the inner rings 8 and 9 are fixed to the outer periphery of the shaft 2, and the outer rings 10 and 11 are fixed to the inner side of the sleeve 4 which is a cylindrical structure. Lubricants such as grease...

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PUM

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Abstract

The present invention relates to a bearing device, in which one end part of a shaft (2) is provided with a flange (5), and an annular sealing plate (3) is held between the flange (5) and an inner ring (9) of a ball bearing (7). Leakage of lubricant is prevented by forming a labyrinth seal between the sealing plate (3) and a sleeve (4). An external diameter of the flange is reduced by the sealing plat (3), such that cost of material is reduced.

Description

technical field [0001] The present invention relates to a bearing device having a structure preventing leakage of lubricant sealed in a ball bearing. Background technique [0002] For example, a bearing unit used in a magnetic head bearing mechanism of a magnetic disk device has a structure to prevent leakage of lubricant sealed in a ball bearing in order to prevent damage to the magnetic disk. Regarding this technique, the following techniques are known. [0003] The structure described in Japanese Patent Application Laid-Open No. 11-166526 is that, in a bearing device having a structure for reducing lubricant scattering and leakage, a guard plate is provided on the axially outer side of the ball bearing, and a guard plate is provided between the guard plate and the housing. Set a micro gap of 200μm or less. [0004] Japanese Unexamined Patent Application Publication No. 2001-84716 describes a bearing device having a structure in which a guard plate is disposed on the axi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C35/06F16J15/447
CPCF16C33/7846F16C33/76F16C33/80F16C19/06F16C19/54
Inventor 土屋邦博
Owner MINEBEA CO LTD
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