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Spindle motor and hard disc drive including the same

A technology of spindle motor and hydrodynamic pressure, which is applied in the direction of electric components, shafts and bearings, shafts, etc., can solve the problems of increased friction loss and power consumption

Inactive Publication Date: 2014-03-26
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, if the dynamic pressure increases, the friction loss increases, eventually leading to an undesired increase in power consumption

Method used

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  • Spindle motor and hard disc drive including the same
  • Spindle motor and hard disc drive including the same
  • Spindle motor and hard disc drive including the same

Examples

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Embodiment Construction

[0057] Now, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like parts.

[0058] figure 1 is a schematic sectional view of the spindle motor according to the embodiment of the present invention.

[0059] refer to figure 1 According to the embodiment of the present invention, the spindle motor 100 may include a hydrodynamic bearing assembly 110 and a stator 130, the fluid dynamic bearing assembly 110 includes a shaft 111, a rotor 120, and a sl...

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Abstract

A spindle motor and a hard disc drive including the same are provided. The spindle motor including: a rotary member; and a fixed member rotatably supporting the rotary member by fluid dynamic pressure, wherein upper radial dynamic pressure generating grooves and lower radial dynamic pressure generating grooves are formed in at least one of surfaces of the rotary member and the fixed member facing each other in a radial direction, and thrust dynamic pressure generating grooves are formed in at least one of surfaces of the rotary member and the fixed member facing each other in an axial direction. In the thin spindle motor, a burden of slope rigidity may be transferred from the radial bearing to the thrust bearing so that the rotary member can have slope rigidity enough to be returned to its original position, when the rotary member is sloped to one side.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2012-0102155 filed with the Korean Intellectual Property Office on September 14, 2012, the disclosure of which is hereby incorporated by reference. technical field [0002] The invention relates to a spindle motor and a hard disk drive including the spindle motor. Background technique [0003] A hard disk drive (HDD), as an information storage device, is a device for reading data stored on a disk or writing data to a disk using a read / write head. [0004] A hard disk drive requires a disk drive to drive the disk, in which a small spindle motor is used. [0005] Such small spindle motors use a hydrodynamic bearing assembly in which a lubricating fluid is placed between the shaft (as the rotating member of the hydrodynamic bearing assembly) and the sleeve (as the stationary member of the hydrodynamic bearing assembly), and the shaft is Fluid pressure support created in the lubricating fluid. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16G11B19/20
CPCG11B19/2036F16C17/107F16C33/107F16C2370/12G11B19/20
Inventor 宋定桓郑新永
Owner SAMSUNG ELECTRO MECHANICS CO LTD