公开(公告)号：DE3581544D1

公开(公告)日：1991-02-28

申请号：DE3581544

申请日：1985-10-31

Applicant: IBM

Inventor： CASTLE FRANK ERIC ,  HATCHETT COLIN PETER ,  HATCHETT MICHAEL ROBERT ,  HEATH JOHN STEWART

IPC: G11B17/038 ,  G11B21/02 ,  G11B25/04 ,  G11B33/14 ,  G11B23/03

Abstract: A disk file comprises a disk stack subassembly (10) and a head positioning actuator (50) each mounted on opposite sides of a central box frame (81). The disk stack subassembly (10) has a non-rotating central spindle (11) and an in-hub electric motor (30) whose stator (32) is mounted on the spindle (11). The rotor (31) of the motor (30) is mounted internally of a hub (15) supported for rotation about the spindle by two bearings (16, 17) at opposite ends of the spindle (11). A stack of disks (18) is mounted externally on the hub (15). The box frame (81) is open to one side and the opposite ends of the stationary spindle (11) are located and fixed in the frame (81) so that the disk stack subassembly (10) spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover (90) completes the enclosure.

公开(公告)号：BR8605304A

公开(公告)日：1987-07-28

申请号：BR8605304

申请日：1986-10-29

Applicant: IBM

Inventor： CASTLE FRANK ERIC ,  HATCHETT COLIN PETER ,  HATCHETT MICHAEL ROBERT ,  HEATH JOHN STEWART

IPC: G11B17/038 ,  G11B21/02 ,  G11B25/04 ,  G11B33/14 ,  G11B17/08

Abstract: A disk file comprises a disk stack subassembly (10) and a head positioning actuator (50) each mounted on opposite sides of a central box frame (81). The disk stack subassembly (10) has a non-rotating central spindle (11) and an in-hub electric motor (30) whose stator (32) is mounted on the spindle (11). The rotor (31) of the motor (30) is mounted internally of a hub (15) supported for rotation about the spindle by two bearings (16, 17) at opposite ends of the spindle (11). A stack of disks (18) is mounted externally on the hub (15). The box frame (81) is open to one side and the opposite ends of the stationary spindle (11) are located and fixed in the frame (81) so that the disk stack subassembly (10) spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover (90) completes the enclosure.