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公开(公告)号：SG38936A1
公开(公告)日：1997-04-17
申请号：SG1996006287
申请日：1996-03-12
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
Abstract: A bearing design for a rotatable assembly includes two freely rotating balls mounted on the axis of rotation of the assembly and axially separated, one near each axial end of the assembly. Each ball is confined by a moving concave bearing surface of the rotatable assembly and a corresponding fixed concave bearing surface of a mounting attached to a frame, housing, or similar non-rotating structure. One of the fixed mountings is preferably attached to a compressible spring to provide a controlled axial pre-load to the assembly. The balls are substantially enclosed and lubricant provided in the enclosed cavity. In the preferred embodiment, the rotatable assembly is a rotary actuator assembly of a disk drive. Compared to conventional ball bearing designs, the present design reduces the number of parts and volume of space occupied by the bearings, reduces hysteresis, and improves shock resistance.
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12.发明专利
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公开(公告)号：CZ9701024A3
公开(公告)日：2003-06-18
申请号：CZ102497
申请日：1995-10-05
Applicant: IBM
Abstract: A direct access storage device (DASD) includes a plurality of motion limiters and/or a continuous motion limiter projecting from at least one of the base and cover, each motion limiter having faces disposed in close proximity to and confronting opposite surfaces of a data storage disk adjacent a peripheral portion of the disk that does not contain data. Preferably, the motion limiters are disposed at several points about the periphery of the disk, and may be incorporated in a load/unload ramp and/or side rails of the DASD. The faces of the motion limiters are disposed relative to the disk so that when the DASD is subjected to an acceleration, the disk contacts at least one of the faces only at the peripheral portion of the disk, outside the data zone. Accordingly, the motion limiters prevent data zone and spindle bearing damage when the DASD is dropped.
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公开(公告)号：HU221356B1
公开(公告)日：2002-09-28
申请号：HU9603626
申请日：1996-05-03
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
Abstract: A bearing design for a rotatable assembly includes two freely rotating balls mounted on the axis of rotation of the assembly and axially separated, one near each axial end of the assembly. Each ball is confined by a moving concave bearing surface of the rotatable assembly and a corresponding fixed concave bearing surface of a mounting attached to a frame, housing, or similar non-rotating structure. One of the fixed mountings is preferably attached to a compressible spring to provide a controlled axial pre-load to the assembly. The balls are substantially enclosed and lubricant provided in the enclosed cavity. In the preferred embodiment, the rotatable assembly is a rotary actuator assembly of a disk drive. Compared to conventional ball bearing designs, the present design reduces the number of parts and volume of space occupied by the bearings, reduces hysteresis, and improves shock resistance.
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公开(公告)号：HUT76704A
公开(公告)日：1997-10-28
申请号：HU9701245
申请日：1995-10-05
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
IPC: G11B17/02 , G11B17/028 , G11B17/038 , G11B19/20 , G11B25/04
Abstract: A disk drive contains an integrally-formed one-piece hub, clamp and rotor housing, which is preferably injection-molded plastic. In the preferred embodiment, the hub includes a hollow cylindrical portion for surrounding a set of bearings mounted on a central shaft, and a flange portion extending from the middle of the cylinder and supporting a single disk. Compliant clamping fingers on the upper surface of the flange engage the disk through its central hole. The fingers are inclined slightly outward, and include a pawl at the end of each finger. During assembly, the disk is forced over the pawls of the fingers until they engage the disk. The fingers, being slightly elastic, will deform to permit the disk to slide over the pawls, and then return to lock the disk in place. The fingers automatically center the disk about the hub axis, without the need for centering tools. The hub also serves as a housing for the rotor of a spindle motor which rotates the disk. A back iron ring and permanent magnets are attached to the underside of the flange at its outer edge to form the rotor. An electromagnetic stator assembly surrounds the disk axis in the annular space defined by the flange, the permanent magnets and back iron at the outer edge, and the cylindrical portion of the hub at the inner edge.
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Patent Agency Ranking
公开(公告)号：BR9504206A
公开(公告)日：1997-04-01
申请号：BR9504206
申请日：1995-09-28
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
IPC: G11B17/02 , G11B17/028 , G11B17/038 , G11B19/20 , G11B25/04 , G11B5/00
Abstract: A disk drive contains an integrally-formed one-piece hub, clamp and rotor housing, which is preferably injection-molded plastic. In the preferred embodiment, the hub includes a hollow cylindrical portion for surrounding a set of bearings mounted on a central shaft, and a flange portion extending from the middle of the cylinder and supporting a single disk. Compliant clamping fingers on the upper surface of the flange engage the disk through its central hole. The fingers are inclined slightly outward, and include a pawl at the end of each finger. During assembly, the disk is forced over the pawls of the fingers until they engage the disk. The fingers, being slightly elastic, will deform to permit the disk to slide over the pawls, and then return to lock the disk in place. The fingers automatically center the disk about the hub axis, without the need for centering tools. The hub also serves as a housing for the rotor of a spindle motor which rotates the disk. A back iron ring and permanent magnets are attached to the underside of the flange at its outer edge to form the rotor. An electromagnetic stator assembly surrounds the disk axis in the annular space defined by the flange, the permanent magnets and back iron at the outer edge, and the cylindrical portion of the hub at the inner edge.
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公开(公告)号：CA2141283A1
公开(公告)日：1995-07-29
申请号：CA2141283
申请日：1995-01-27
Applicant: IBM
Inventor： AOYAGI AKIHIKO , BOUTAGHOU ZINE-EDDINE , DAS KHANNA VIJAYESHWAR , KUMAR SURESH , SRI-JAYANTHA MUTHUTHAMBY
Abstract: A technique for preventing damage to ball bearings in small form factor device is disclosed where the device has at least one crash stop ring disposed about the shaft and inside the rotor of a device. The ring is dimensioned to permit only a small amount of movement of the rotor relative to the shaft. The permitted movement is less than the minimum movement which would cause damage to the elements of the ball bearing.
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公开(公告)号：GB2285533A
公开(公告)日：1995-07-12
申请号：GB9500060
申请日：1995-01-04
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE , COSSETTE LUKE ANTONIO , LUOMA RICHARD W
Abstract: A magnetic fluid seal is provided by mounting an annular, axially polarized magnet 35 mounted on the device base member 10 and an annular ring pole piece 36 with an inner diameter that cooperates with an outer diameter surface of the hub assembly 13 to form a fluid gap that is radially outward and within the axial extent of the spindle bearings 15, 17. The secondary gap 44 of the seal assembly is within the bearing assembly sealed volume while the principal sealing gap is within the hub assembly to confine any debris or aerosols resulting from high rotational velocity or shock to be contained in proximity to the flux fields that can recapture any magnetic material. The assembly also inherently presents an effective conductive path to provide enhanced grounding of the rotating assembly through the magnetic fluid in the second gap which is not subject to impairment caused by bonding materials. The seal assembly design also provides for self loading of the magnetic fluid without permitting escape of smeared liquid beyond the region of the seal assembly.
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公开(公告)号：ES2162852T3
公开(公告)日：2002-01-16
申请号：ES94480145
申请日：1994-11-24
Applicant: IBM
Inventor： AOYAGI AKIHIKO , BOUTAGHOU ZINE-EDDINE , KHANNA VIJAYESHWAR DAS , KUMAR SURESH , SRI-JAYANTHA MUTHUTHAMBY
Abstract: A technique for preventing damage to ball bearings in small form factor device is disclosed where the device has at least one crash stop ring disposed about the shaft and inside the rotor of a device. The ring is dimensioned to permit only a small amount of movement of the rotor relative to the shaft. The permitted movement is less than the minimum movement which would cause damage to the elements of the ball bearing.
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公开(公告)号：ES2162073T3
公开(公告)日：2001-12-16
申请号：ES96919665
申请日：1996-05-03
Applicant: IBM
Inventor： BOUTAGHOU ZINE-EDDINE
Abstract: A bearing design for a rotatable assembly includes two freely rotating balls mounted on the axis of rotation of the assembly and axially separated, one near each axial end of the assembly. Each ball is confined by a moving concave bearing surface of the rotatable assembly and a corresponding fixed concave bearing surface of a mounting attached to a frame, housing, or similar non-rotating structure. One of the fixed mountings is preferably attached to a compressible spring to provide a controlled axial pre-load to the assembly. The balls are substantially enclosed and lubricant provided in the enclosed cavity. In the preferred embodiment, the rotatable assembly is a rotary actuator assembly of a disk drive. Compared to conventional ball bearing designs, the present design reduces the number of parts and volume of space occupied by the bearings, reduces hysteresis, and improves shock resistance.
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