公开(公告)号：JPH11287240A

公开(公告)日：1999-10-19

申请号：JP35019998

申请日：1998-12-09

Applicant: IBM

Inventor： LEE CHEN-HSIUNG ,  NAGARAJ HOLAVANAHALLY SESHACHA ,  SHIRLE NEAL BERTRAM

IPC: F16C17/04 ,  F16C33/10 ,  F16C33/74 ,  G11B19/20 ,  G11B25/04 ,  H02K5/124 ,  H02K5/16 ,  H02K7/08

Abstract: PROBLEM TO BE SOLVED: To provide an axial bearing supporting structure by which the oil leakage can be prevented, the maintainability of a bearing under the impact can be kept, the evaporation of the oil can be reduced, and the deformation of the active bearing face can be minimized. SOLUTION: A dynamic fluid bearing comprises a thrust plate connected with a shaft, a bearing plate 214 connected with a sleeve, and a load plate 240, the load plate pushes the bearing plate toward the thrust plate, and an adhesive 250 composed of UV epoxy is applied between the load plate and the thrust plate. The sleeve is connected with a stator for the operation, and the stator rotates the sleeve when receiving a driving signal. Further a diffusion barrier 260 is mounted between the sleeve 230 and the stator, and a second diffusion barrier 270 is mounted between the load plate and the shaft. The bearing optionally includes an O-ring 222.

公开(公告)号：SG70136A1

公开(公告)日：2000-01-25

申请号：SG1998004927

申请日：1998-11-23

Applicant: IBM

Inventor： LEE CHEN-HSIUNG ,  SHIRLE NEAL BERTRAM ,  NAGARAJ HOLAVANAHALLY SESHACHA

IPC: F16C17/04 ,  F16C33/10 ,  F16C33/74 ,  G11B19/20 ,  G11B25/04 ,  H02K5/124 ,  H02K5/16 ,  H02K7/08 ,  G11B33/14

Abstract: A dynamic fluid bearing for a spindle motor is disclosed, which provides a fluid bearing seal and support structure that simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft 480 and a bearing plate 214 and load plate 240 coupled to a sleeve 430, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive 250 is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator 494, 498, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier 270 disposed between the sleeve and the stator. A second diffusion barrier 260 is disposed between the load plate and the shaft. The bearing structure may also include an O-ring 222 disposed above the bearing plate for sealing a gap between the bearing plate and the sleeve.

公开(公告)号：SG78334A1

公开(公告)日：2001-02-20

申请号：SG1999001006

申请日：1999-02-23

Applicant: IBM

Inventor： SHIRLE NEAL BERTRAM

IPC: G11B25/04 ,  G11B33/14 ,  H02K21/22 ,  G11B19/20 ,  C22C29/36 ,  G11B5/00 ,  G11B17/02

Abstract: A highly thermally conductive spindle support shaft is composed of a metal matrix composite of aluminum (Al) and silicon carbide (SiC) of substantially 53% to 63% silicon carbide by volume. The spindle support shaft supports a magnetic disk file spindle by means of rotatable bearings, replacing a steel shaft. The spindle support shaft increases the heat transfer from, and reduces the temperature of, the rotatable bearing, and matches the coefficient of thermal expansion of a conventional steel shaft, thereby maintaining the bearing preload through a range of temperatures.