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Spindle motor

A spindle motor, axial technology, applied in the directions of shafts, bearings, electromechanical devices, etc., can solve problems such as deformation of cover parts, obstruction of smooth circulation of working fluid, deterioration of motor operation performance and reliability, etc.

Inactive Publication Date: 2013-06-26
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As shown in the results of each of the eight samples in each time unit, in the case where the motor rotates at a high speed, the surface of the corresponding cover is deformed according to the continuous circulation of the working fluid, thereby preventing the smooth circulation of the working fluid
[0008] In particular, in the case where the force generated by the working fluid is continuously applied to the cover, the cover is deformed, and due to the deformation of the cover, the working fluid forming the hydrodynamic bearing cannot flow smoothly
In a spindle motor using a fluid dynamic pressure bearing, serious problems such as deterioration of the operability and reliability of the motor arise in the case where the working fluid cannot circulate smoothly

Method used

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Embodiment Construction

[0024] Many features and advantages of the present invention will be more apparent from the following description of the embodiments in conjunction with the accompanying drawings.

[0025] The terms and words used in this specification and claims should not be construed as being limited to their typical meanings or dictionary definitions, but should be construed as having meanings and concepts related to the technical scope of the present invention based on the following rules, according to which, The inventor can appropriately define the concepts of the terms to best describe the best method known to him or her for carrying out the invention.

[0026] The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. In the specification, when adding reference numerals to components of all drawings, it should be noted that the same reference numera...

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Abstract

Disclosed herein is a spindle motor in which a corresponding surface of a cover member that an operating fluid circulated from a radial bearing part of the spindle motor contacts is formed to be tapered. A taper part is formed on the corresponding surface of the cover member that the operating fluid forming a fluid dynamic pressure bearing is circulated to contact to improve durability of the cover member and increase a circulation speed of the operating fluid, thereby making it possible to improve current characteristics.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2011-0138277, filed December 20, 2011, entitled "Spindle Motor", the entire contents of which are hereby incorporated by reference incorporated into this application. . technical field [0003] The invention relates to a spindle motor. Background technique [0004] In general, a spindle motor belonging to a brushless DC motor (BLDC) is widely used as a laser beam scanning motor for a laser printer, a motor for a floppy disk drive (FDD), a motor for, for example, a compact disk (CD) or a digital versatile disk (DVD) ), etc. for optical disc drives, and for hard disk drives. [0005] Recently, in devices such as hard disk drives that require large-capacity and high-speed driving force, spindle motors including fluiddynamic pressure bearings that have less driving friction than existing ball bearings are commonly used To minimize noise and the gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K5/16H02K1/27
CPCH02K5/1675F16C17/107F16C2370/12G11B19/20H02K7/088
Inventor 赵诚浮
Owner SAMSUNG ELECTRO MECHANICS CO LTD