| US 7,474,501 B2 | ||
| Outer hub assembly and spindle motor including the same in hard disk drive and method for servo-track writing | ||
| Dong-ho Oh, Seoul (Korea, Republic of); Ja-choon Koo, Seoul (Korea, Republic of); Yong-kyu Byun, Yongin-si (Korea, Republic of); and Jae-hyuk Han, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-si (Korea, Republic of) | ||
| Filed on Jun. 23, 2005, as Appl. No. 11/159,215. | ||
| Claims priority of application No. 10-2004-0049747 (KR), filed on Jun. 29, 2004. | ||
| Prior Publication US 2005/0286164 A1, Dec. 29, 2005 | ||
| Int. Cl. G11B 17/038 (2006.01); G11B 25/04 (2006.01) | ||
| U.S. Cl. 360—98.07 [360/98.08; 360/99.08; 360/99.12] | 32 Claims |
| 1. A hub assembly comprising:
an outer hub;
a fastening member coupled to a top portion of the outer hub; and
an inner hub or a motor shaft;
wherein said outer hub is detachably coupled to an outer periphery of the inner hub or to an outer periphery of the motor
shaft, the outer hub is shaped such that a plurality of disks and at least one spacer for maintaining an interval between
adjacent disks among the plurality of disks are fitted to an outer periphery of the outer hub;
wherein said fastening member fixes the outer hub to the inner hub or the motor shaft;
wherein the outer hub comprises a cylindrical body unit, a support unit disposed on a bottom portion of the body unit and
supporting the plurality of disks, and a clamping unit disposed on a top portion of the body unit and clamping the plurality
of disks; and
wherein the body unit comprises an upper body and a lower body, the clamping unit is integrated with a top portion of the
upper body in the form of a flange, and the support unit is integrated with a bottom portion of the lower body in the form
of a flange;
wherein the clamping unit and the top portion of the upper body are parts of a first single-piece unit, and the support unit
and the bottom portion of the lower body are parts of a second single-piece unit.
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