US 7,093,346 B2Granted

Conning motor hub surface method for hard disk drives

AssigneeSamsung Electronics Co., Ltd.

InventorsWoo-Sung Kim, Sung-Wook Kim, Eui-Sup Ka

Life of this patent

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Abstract

A hard disk hub has a disk-mounting face formed at one end as a truncated conical surface of revolution symmetric about the hub axis. A cylindrical inner hub member is coaxial with the hub body outside diameter and the surrounding mounting face. The inner hub member is adapted to receive a planar disk with a central mounting hole with disk inside diameter fitted around it. The mounting face is disposed at a hub conning angle (π/2+/−Ω) relative to the hub axis. Hub conning angle Ω is selected so that a disk mounting force F applied to an inner disk portion surrounding the central mounting opening bends a portion of the disk interior to the hub inside diameter to conform contiguous facing relationship with the conical disk-mounting face. This interior bending portion reduces or eliminates the tendency of the outer disk portion to form an excessive conning angle θ.

Claims10

Dependent claims

A method for making a disk mounting hub for mounting a disk on an axial hard disk spindle in which said disk has opposite parallel faces between a disk outside diameter and a coaxial disk inside diameter defining a central opening there through, comprising:

forming a rigid cylindrical hub body having a hub outside diameter disposed along a central axis;
forming a cylindrical disk-mounting member disposed coaxial with said central axis at one end of said body and extending proximally with an inside diameter from said one end of said body, said inside diameter being sized to be received through said disk opening;
forming a coaxial hub face extending from said hub outside diameter to said member inside diameter adjacent to said one end of said hub as a truncated conical surface of revolution symmetrical about said axis, in which said conical surface is disposed at an oblique hub face angle Ω relative to said axis;
wherein said hub face angle Ω acts to minimize a disk conning angle Φ when said disk is clamped against said hub face.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/145,908Filed 3 Jun 2005 · division
Priority: 8 Sep 2003
Published: US 2005/0052782 A113 Oct 2005
Granted: 22 Aug 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

G11B 17/0287
Of discs rotating during transducing operation: by permanent connections, e.g. screws, rivets
G11B 17/028
Positioning or locking of single discs: of discs rotating during transducing operation
G11B 17/0282
Of discs rotating during transducing operation: by means provided on the turntable
G11B 19/2045
Turntables, hubs and motors for disk drives; Mounting of motors in the drive: hubs

Family

Application10/657,351Parent of this division · filed 8 Sep 2003
US 2005/0223544 A1Pre-grant publication · published 13 Oct 2005
US 2005/0052782 A1Published application
US 7,133,251 B2Related patent
US 7,093,346 B2This patent

From the US filing history. Foreign family members aren’t listed.