Bearing Structure and Spindle Motor Having the Same

a bearing structure and spindle technology, applied in the direction of bearing unit rigid support, sliding contact bearings, mechanical instruments, etc., can solve the problem of incorrect gap formed between the rotating shaft and the bearing housing

Inactive Publication Date: 2014-02-06
HITACHI LG DATA STORAGE KOREA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This design prevents the contraction of the bearing's inner diameter during press-fitting, maintains the original size of the bearing, and reduces manufacturing complexity by avoiding the need for resizing, while ensuring proper gap formation between the rotating shaft and the bearing housing, thus enhancing the rotating characteristics of the spindle motor.

Problems solved by technology

Also, even if the inner diameter is expanded by the resizing process, the gap formed between the rotating shaft and the bearing housing may be incorrect.

Method used

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  • Bearing Structure and Spindle Motor Having the Same
  • Bearing Structure and Spindle Motor Having the Same
  • Bearing Structure and Spindle Motor Having the Same

Examples

Experimental program
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Embodiment Construction

[0025]FIG. 1 is a cross-sectional view illustrating a spindle motor according to an embodiment of the present invention.

[0026]Referring to FIG. 1, the spindle motor 100 includes a base plate 110, a stator 120, a rotor 130, a rotating shaft 140, and a bearing structure. The bearing structure has a bearing 160 and a bearing housing 150.

[0027]The base plate 110 has a circuit board 115 and the circuit board 115 is disposed on an upper face of the base plate 110. The base plate 110 has a through-hole passing through the upper face and a lower face opposite to the upper face. The bearing housing 150 of the bearing structure is coupled to the base plate 110 using the through-hole formed therethrough.

[0028]The stator 120 is combined with a circumferential face of the bearing housing 150, the rotor 130 is coupled to a circumferential face of the rotating shaft 140. The rotating shaft 140 is rotatably supported to the bearing 160 disposed in the bearing housing 150.

[0029]The stator 120 includ...

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Abstract

A spindle motor is disclosed, wherein the spindle motor includes a bearing housing coupled to the base plate, a bearing disposed in the bearing housing, and a rotating shaft inserted into the bearing to rotatably support to the bearing, a portion of bearing protruded from a circumferential face of the bearing is press-fitted into an inner face of the bearing housing.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of U.S. patent application Ser. No. 12 / 870,049, filed Aug. 27, 2010, which claims the benefit under 35 U.S.C. §119 of Korean Application Number 10-2009-0080540, filed Aug. 28, 2009, which is hereby incorporated by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a bearing structure and a spindle motor having the same.[0004]2. Description of Related Art[0005]Generally, a spindle motor includes a rotating shaft that is rotatably supported by a bearing disposed in a bearing housing, a rotator, which is coupled to the rotating shaft, including a magnet, a stator having a coil providing a magnet field to the magnet of the rotator, and a base plate combined with the bearing housing.[0006]Generally, the bearing is press-fitted into the bearing housing, and in a case the bearing is press-fitted into the bearing housing, a large compression stress is applied...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F16C17/12H02K5/16
CPCH02K5/165F16C17/12F16C17/02F16C35/02H02K5/163H02K5/16H02K5/167
InventorKIM, CHANSEOK
OwnerHITACHI LG DATA STORAGE KOREA