公开(公告)号：US20210012797A1

公开(公告)日：2021-01-14

申请号：US17037308

申请日：2020-09-29

申请人： Western Digital Technologies, Inc.

发明人： Diep Nguyen ,  David K. Myers ,  Bikash Sukla

IPC分类号： G11B5/58 ,  G11B5/60

摘要： An approach to a reduced-head hard disk drive (HDD) involves an actuator elevator subsystem that includes a ball screw cam assembly with a hybrid permanent magnet (PM)-variable reluctance (VR) stepper motor disposed therein, to rotate the cam screw, which vertically translates an actuator arm assembly so that a corresponding pair of read-write heads can access different magnetic-recording disks of a multiple-disk stack. A suitably configured hybrid stepper motor can provide 200 full steps/rev for a 3.8 mm translation. Thus, to meet or surpass a step resolution of 6 μm/μstep or 0.5625°/μstep, the hybrid stepper motor would only need to be operated at 4 micro-step mode in order to achieve a 0.45°/μstep or 0.00475 mm/μstep, which enables a smoother motion since the available holding torque at the 4th micro-step provides sufficient torque margin to overcome load torque, frictional torque, and detent torque.

公开(公告)号：US09171583B1

公开(公告)日：2015-10-27

申请号：US14666184

申请日：2015-03-23

申请人： Western Digital Technologies, Inc.

发明人： Nicholas D. Smyth ,  David K. Myers

IPC分类号： G11B19/20 ,  G11B33/14 ,  G11B33/02

CPC分类号： G11B33/1466 ,  G11B19/20 ,  G11B25/043

摘要： A disk drive has a disk drive base with a central cavity surrounded by a peripheral wall that has a peripheral top face. The disk drive has a top cover with an outer periphery spaced from the peripheral wall by a peripheral clearance gap. A foil seal is adhered to a central top face of the top cover and the peripheral top face of the peripheral wall, and spans the peripheral clearance gap. The top cover includes a first channel that is depressed relative to the central top face. The foil seal covers the first channel, and the first channel is vented to the central cavity by a venting channel that connects the first channel to the peripheral clearance gap.

摘要翻译： 磁盘驱动器具有磁盘驱动器基座，其中心腔被外围壁包围，外围壁具有外围顶面。 磁盘驱动器具有顶盖，其外周与周壁间隔开周边的间隙。 箔密封件粘附到顶盖的中心顶面和周壁的周边顶面，并跨越周边间隙。 顶盖包括相对于中央顶面凹陷的第一通道。 箔密封件覆盖第一通道，并且第一通道通过将第一通道连接到外周间隙的通风通道排放到中心空腔。

公开(公告)号：US08760816B1

公开(公告)日：2014-06-24

申请号：US13860505

申请日：2013-04-10

申请人： Western Digital Technologies, Inc.

发明人： David K. Myers ,  Daniel T. Nguyen

IPC分类号： G11B5/39

CPC分类号： G11B5/5573 ,  G11B21/22

摘要： A disk drive includes a disk drive base and a disk rotatably mounted to the disk drive base. First and second permanent magnets are fixed to the disk drive base. An actuator is pivotably mounted to the disk drive base. The actuator defining an actuator pivot axis about which the actuator pivots. The actuator includes an actuator coil disposed between the first and second permanent magnets. An actuator latch is disposed adjacent to the actuator. The actuator latch includes a biasing element that comprises a ferromagnetic material. An overlapping portion of the first permanent magnet overlaps the second permanent magnet as viewed from a viewing direction that is parallel to the actuator pivot axis. A protruding portion of the first permanent magnet does not overlap the second permanent magnet as viewed from the viewing direction.

摘要翻译： 磁盘驱动器包括盘驱动器基座和可旋转地安装到盘驱动器基座的盘。 第一和第二永磁体被固定到磁盘驱动器基座。 致动器可枢转地安装到盘驱动器底座。 致动器限定致动器枢轴，致动器枢轴围绕致动器枢轴枢转。 致动器包括设置在第一和第二永磁体之间的致动器线圈。 致动器闩锁邻近致动器设置。 致动器闩锁包括包含铁磁材料的偏置元件。 从与致动器枢转轴线平行的观察方向观察，第一永磁体的重叠部分与第二永磁体重叠。 当从观察方向观察时，第一永磁体的突出部分不与第二永磁体重叠。

公开(公告)号：US10930307B2

公开(公告)日：2021-02-23

申请号：US16731740

申请日：2019-12-31

申请人： Western Digital Technologies, Inc.

发明人： Bikash Sukla ,  David K. Myers ,  Jon M. Garbarino ,  Garold W. Plonczak

IPC分类号： G11B5/48

摘要： An approach to a reduced-head hard disk drive (HDD) involves an actuator elevator assembly for moving an actuator assembly along at least one support feature to provide a head slider access to at least two different disk media of a disk stack. The HDD includes a piezoelectric-based locking mechanism, including at least one piezoelectric actuator, movably coupled with the support feature, such that actuation of the actuator either locks or unlocks the locking mechanism relative to the support feature. When unlocked, the actuator assembly can be translated along the length of the disk stack via the actuator elevator assembly.

公开(公告)号：US10978100B1

公开(公告)日：2021-04-13

申请号：US16933802

申请日：2020-07-20

申请人： Western Digital Technologies, Inc.

发明人： David K. Myers

IPC分类号： G11B5/48 ,  G11B33/12

摘要： An approach to a reduced-head hard disk drive involves an actuator subsystem that includes a ball screw cam assembly wherein the number of starts of a multi-start lead screw equals the number of balls riding in a corresponding start. A stepper motor may be employed to drive rotation of a pulley or gear to which a drive belt or drive chain is attached, to transmit power to the lead screw via the drive belt or chain, thereby driving rotation of the lead screw to drive translation of an actuator arm assembly along the axis of the lead screw so that a corresponding pair of read-write heads can access different magnetic-recording disks of a multiple-disk stack.

公开(公告)号：US10916271B1

公开(公告)日：2021-02-09

申请号：US16912514

申请日：2020-06-25

申请人： Western Digital Technologies, Inc.

发明人： Jon Jacoby ,  David K. Myers ,  Jon M. Garbarino

IPC分类号： G11B21/22 ,  G11B21/12 ,  G11B5/54 ,  G11B5/48

摘要： An approach to a reduced-head hard disk drive (HDD) includes a load/unload (LUL) ramp subsystem that includes a translatable ramp assembly that includes a biasing member and a magnet coupled thereto, which is magnetically engaged with a guide post to provide a bias force at an interface of a lead screw and the ramp assembly. The bias force acts upon the interface by reducing a gap between outer threads of the lead screw and inner threads of a mating threaded interface structure of the ramp assembly that would otherwise cause lead screw hysteresis without the bias force.

公开(公告)号：US09183889B1

公开(公告)日：2015-11-10

申请号：US14666168

申请日：2015-03-23

申请人： Western Digital Technologies, Inc.

发明人： Nicholas D. Smyth ,  David K. Myers

IPC分类号： G11B19/20 ,  G11B33/14 ,  G11B33/02

CPC分类号： G11B33/1466 ,  G11B19/2036 ,  G11B25/043 ,  G11B33/02

摘要： A disk drive has a disk drive base with a central cavity surrounded by a peripheral wall. The disk drive also includes a top cover attached to the disk drive base and disposed over the central cavity to define a disk drive enclosure. A disk is rotatably attached to the disk drive base within the central cavity, and is disposed within the disk drive enclosure. The top cover has a central top face that defines a central top face plane. A foil seal is adhered to the central top face. The central top face of the top cover includes a first channel that has a bottom land that is depressed towards the disk relative to the central top face plane, and the foil seal covers the first channel. The first channel is vented to the central cavity by a hole through the bottom land of the first channel.

摘要翻译： 磁盘驱动器具有磁盘驱动器基座，其中心腔被周壁围绕。 磁盘驱动器还包括附接到磁盘驱动器底座并设置在中心空腔上的顶盖，以限定磁盘驱动器外壳。 磁盘可旋转地附接到中央空腔内的磁盘驱动器基座，并且设置在磁盘驱动器外壳内。 顶盖具有限定中心顶面平面的中心顶面。 箔密封件粘附到中心顶面。 顶盖的中心顶面包括第一通道，该第一通道具有相对于中心顶面平面朝向盘压下的底部平台，并且箔密封件覆盖第一通道。 第一通道通过穿过第一通道底部底部的孔而排放到中心空腔。

公开(公告)号：US11037590B2

公开(公告)日：2021-06-15

申请号：US17037308

申请日：2020-09-29

申请人： Western Digital Technologies, Inc.

发明人： Diep Nguyen ,  David K. Myers ,  Bikash Sukla

IPC分类号： G11B5/48 ,  G11B5/58 ,  G11B5/60

摘要： An approach to a reduced-head hard disk drive (HDD) involves an actuator elevator subsystem that includes a ball screw cam assembly with a hybrid permanent magnet (PM)-variable reluctance (VR) stepper motor disposed therein, to rotate the cam screw, which vertically translates an actuator arm assembly so that a corresponding pair of read-write heads can access different magnetic-recording disks of a multiple-disk stack. A suitably configured hybrid stepper motor can provide 200 full steps/rev for a 3.8 mm translation. Thus, to meet or surpass a step resolution of 6 μm/μstep or 0.5625°/μstep, the hybrid stepper motor would only need to be operated at 4 micro-step mode in order to achieve a 0.45°/μstep or 0.00475 mm/μstep, which enables a smoother motion since the available holding torque at the 4th micro-step provides sufficient torque margin to overcome load torque, frictional torque, and detent torque.

公开(公告)号：US20200227077A1

公开(公告)日：2020-07-16

申请号：US16731740

申请日：2019-12-31

申请人： Western Digital Technologies, Inc.

发明人： Bikash Sukla ,  David K. Myers ,  Jon M. Garbarino ,  Garold W. Plonczak

IPC分类号： G11B5/48

摘要： An approach to a reduced-head hard disk drive (HDD) involves an actuator elevator assembly for moving an actuator assembly along at least one support feature to provide a head slider access to at least two different disk media of a disk stack. The HDD includes a piezoelectric-based locking mechanism, including at least one piezoelectric actuator, movably coupled with the support feature, such that actuation of the actuator either locks or unlocks the locking mechanism relative to the support feature. When unlocked, the actuator assembly can be translated along the length of the disk stack via the actuator elevator assembly.

公开(公告)号：US09099153B2

公开(公告)日：2015-08-04

申请号：US13897655

申请日：2013-05-20

申请人： Western Digital Technologies, Inc.

发明人： Nicholas D. Smyth ,  Daniel T. Nguyen ,  David K. Myers

IPC分类号： G11B33/02 ,  G11B25/04 ,  G11B21/22

CPC分类号： G11B25/043 ,  G11B5/012 ,  G11B21/22

摘要： A disk drive assembly having a base, a cover, a post extending from the base toward the cover, and a latch movably mounted on the post such that the post extends there through, wherein the post comprises a cover supporting portion configured to support the cover, and prevent the cover from compressing the latch and causing the latch from contacting both the cover and the base simultaneously when a load is applied to a portion of the cover above the latch.

摘要翻译： 一种磁盘驱动器组件，具有底座，盖子，从基座朝向盖子延伸的支柱，以及可移动地安装在柱上的闩锁，使得支柱延伸到那里，其中支柱包括盖支撑部分， 并且当负载施加到闩锁上方的盖的一部分时，防止盖压缩闩锁并使闩锁同时接触盖和基座两者。