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Bearing device

A technology of bearing device and bearing part, which is applied in the field of bearing devices, can solve problems such as difficulties, reduced rotation accuracy, and cost reduction, and achieve the effect of sufficient bonding strength

Inactive Publication Date: 2007-01-03
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, since the housing is eccentric in the radial direction with respect to the axis and vibrates, there is a problem of lowering the rotation accuracy.
In addition, each part needs to be ground with high precision so that the outer ring does not incline in the radial direction, so it is difficult to reduce the cost.

Method used

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Examples

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Embodiment Construction

[0089] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0090] figure 1 It is an axial sectional view of the bearing device according to the first embodiment of the present invention, figure 2 It is a sectional view showing the main part of the bearing device related to the same embodiment. figure 1 Among them, the bearing device 110 is composed of a pair of deep groove ball bearings 111, 111 supporting the main shaft (shaft) S of the main engine, and a cylindrical housing 112 supporting the ball bearings 111, 111 on the same axis.

[0091] The housing 112 has an inner surface tightly fitted with the outer diameter surface of the rolling bearing 111, and on the inner surface of the housing 112, a figure 2 The stepped portion 113 is shown. The ball bearing 111 is composed of an outer ring 111a, an inner ring 111b, a rotating body 111c, a cage 111d, and the like.

[0092] The fitting parts 112a, 112a of the housing 112 are resp...

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PUM

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Abstract

A bearing device in which the inner surface of a housing 112 coaxially supporting a pair of ball bearings 111 supporting a spindle shaft S is formed with a step portion 113 abutting against the end surfaces of the outer rings of the ball bearings 111, wherein the opposite ends of the housing 112 are formed with fitting portions 112a for the ball bearings 111, and the inner surface of the housing between the fitting portions 112a and the step portion 113 is larger than the outer diameter of the ball bearings 111. Further, the press fitting length of the press fitting portion between the shaft and the inner ring is not more than 1 / 3 of the shaft diameter.

Description

technical field [0001] The present invention relates to the support of rotating shafts for disk storage spindle motors such as VCR (Video Cassette Recorder), drum spindle motors for tape streaming, LBP motors, HDD (Hard Disk Drive) motors, HDD cradles, other motors Bearing device. Background technique [0002] For example, in the drum spindle motor used for VCR and tape flow, as a bearing to support its spindle, it is loaded into existing such as Figure 30 The bearing assembly shown. This bearing device is composed of a pair of rolling bearings 11, 11 supporting the main shaft S of the main engine, and a cylindrical housing 12 holding the rolling bearings 11, 11 on the same axis. [0003] The housing 12 has an inner surface tightly fitted with the outer diameter surface of the rolling bearing 11, and the inner surface of the housing 12 is formed as Figure 31 The stepped portion 13 is shown. The rolling bearing 11 is composed of an outer ring 11a, an inner ring 11b, a ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C35/067F16C35/063F16C19/54F16C19/06F16C19/16F16C25/08F16C35/06
CPCF16C25/083F16C19/54F16C35/067F16C35/061F16C35/077F16C19/548
Inventor 宫崎晴三
Owner NSK LTD
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