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公开(公告)号：US5757101A
公开(公告)日：1998-05-26
申请号：US689477
申请日：1996-08-08
CPC分类号： H02K1/2786
摘要： A rigid disk drive spindle motor includes a bobbin carried by the motor hub which has a permanent magnet attached to the inner cylindrical surface and a laminated back iron mounted at the outer cylindrical surface. The laminated back iron may be in the form of concentric cylinders or a spiral wound strip with adjoining cylinders or convolutions secured to and electrically separated from one another by an adhesive material. In another form, the back iron may be formed as a series of washer like rings mounted on the bobbin which is a configuration similar to the laminations used in the motor stator and would permit fabrication using the same manufacturing techniques. The back iron is formed of high resistance silicon steel so that both the back iron material and the laminated structure discourage Eddy current formation. The spiral wound embodiment may also be modified by having the spiral strip periodically, axially interrupted to further reduce undesired induced currents. Use of the bobbin serves to assure the concentricity of the closely adjoining stationary and rotary parts of the spindle motor and to facilitate easier manufacture and assembly. To further confine the magnetic fields, laminated fringe ring assemblies are provided at each axial end of the back iron structure. These assemblies are formed of washer like rings of permeable material that are secured to one another and electrically separated by adhesive material.
摘要翻译： 刚性盘驱动主轴电动机包括由马达轮毂承载的线轴，该线轴具有附接到内圆柱形表面的永磁体和安装在外圆柱形表面上的层叠后铁。 层压的后铁可以是同心圆筒形的形式，也可以是具有相邻的气缸或螺旋圈的螺旋缠绕的条带，其通过粘合剂材料固定并彼此电分离。 在另一种形式中，后铁可以形成为安装在线轴上的一系列垫圈，类似于在电动机定子中使用的叠片的构造，并且将允许使用相同的制造技术进行制造。 背铁由高电阻硅钢形成，使得后铁材料和层压结构都阻止涡流形成。 螺旋缠绕实施例也可以通过使螺旋带周期性地轴向中断以进一步减少不期望的感应电流而被修改。 线轴的使用用于确保主轴电机的紧密相邻的固定和旋转部件的同心度，并且便于制造和组装。 为了进一步限制磁场，在后铁结构的每个轴向端部设置层压边缘环组件。 这些组件由可渗透材料的垫圈形成，彼此固定并通过粘合剂材料电分离。
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2.发明授权
公开(公告)号：US5394284A
公开(公告)日：1995-02-28
申请号：US959007
申请日：1992-10-09
CPC分类号： G11B25/043 , F16C33/3843 , G11B19/2009 , G11B5/48 , F16C2370/12
摘要： The instability of a cage in a precision ball bearing at high speeds may be eliminated by controlling the position of the cage. The control of a position of a cage is accomplished by forming three ball pockets or holes in the cage for the balls of the ball bearing assembly to a dimension that will result in a tight running fit between the ball and the ball pocket. A tight running fit between the ball and the cage is found in three of the ball pockets in a ball bearing assembly while the diameter of the large ball pockets or other remaining ball pockets is enlarged to provide a clearance between the balls and the cage which is at least twice the clearance between the ball and the guide ball pocket having the tight running fit, and preferably three to five times that clearance. When properly lubricated, the tight running fit will insure stabilization and control of the cage so that the cage remains stable at high rotational speeds.
摘要翻译： 可以通过控制保持架的位置来消除高精度滚珠轴承中的保持架的不稳定性。 保持架位置的控制是通过在滚珠轴承组件的滚珠的保持架中形成三个球窝或孔，以达到球与球袋之间的紧密配合的尺寸。 在滚珠轴承组件中的三个球袋中发现球和保持架之间的紧密配合，而大的球窝或其他剩余的球窝的直径被扩大以提供滚珠和保持架之间的间隙， 球与具有紧密配合的导向球袋之间的间隙的至少两倍，并且优选为该间隙的三到五倍。 在适当润滑的情况下，紧密的运动配合将确保保持架的稳定和控制，使得保持架在高转速下保持稳定。
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公开(公告)号：US4439699A
公开(公告)日：1984-03-27
申请号：US340169
申请日：1982-01-18
申请人： Arthur P. Brende , Richard W. Luoma
发明人： Arthur P. Brende , Richard W. Luoma
IPC分类号： H02K33/18 , G11B5/54 , H02K41/035 , H02K41/02
CPC分类号： G11B5/54 , H02K41/0356
摘要： The magnetic head actuator includes a substantially totally enclosed self-shielding voice coil linear motor which includes a continuous, cylindrical permanent magnet of flexible material which is sealed against the inner cylindrical wall of the outer core by a flared copper sleeve that also serves as a non-magnetic, conductive shorted turn to reduce instantaneous inductance of the drive coil. An annular reluctance gap in the outer core provides symmetrical distribution of the permanent magnet flux.
摘要翻译： 磁头致动器包括基本上全封闭的自屏蔽音圈线性电动机，其包括柔性材料的连续的圆柱形永久磁体，该永磁体通过也用作非磁性材料的扩口铜套密封在外芯的内圆柱形壁上 - 导磁短路转，降低驱动线圈的瞬时电感。 外芯中的环形磁阻间隙提供永久磁通量的对称分布。
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公开(公告)号：US4724499A
公开(公告)日：1988-02-09
申请号：US787933
申请日：1985-10-16
CPC分类号： G11B25/043 , G11B17/038 , G11B33/14
摘要： An enclosure for a rigid disk data file is shown which includes a base casting and a cover that interface along planar surface that is not perpendicular to the axis of the spindle supporting the data disks. The base casting at one side extends axially along the disk stack and has the transducer positioning actuators mounted through openings therein. At the opposite side, the disk stack is fully exposed to permit easy access to the disk surface for procedures such as servo writing during manufacture of the drive. This structure makes possible concurrent operation of the product heads and servo writing heads.
摘要翻译： 示出了用于刚性盘数据文件的外壳，其包括底座铸件和与平面不相垂直于支撑数据盘的心轴的轴线的盖。 一侧的基底铸件沿盘堆叠轴向延伸，并且具有通过其中的开口安装的换能器定位致动器。 在相反的一侧，磁盘堆叠被完全暴露以允许容易地访问磁盘表面，用于在制造驱动器期间的诸如伺服写入的过程。 这种结构使产品头和伺服写头的并行操作成为可能。
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公开(公告)号：US4700246A
公开(公告)日：1987-10-13
申请号：US798041
申请日：1985-11-14
CPC分类号： H02K41/0356 , G11B5/5521
摘要： An actuator for positioning transducers with respect to a disk storage device data surface provides a substantially sealed head-disk enclosure from which the voice coil motor permanent magnets are excluded. The mounting flange-inner core member, end cap and collar and shorted turn provide a sealed enclosure about the transducer carriage, voice coil and working air gap of the voice coil motor (VCM) with the permanent magnet and outer core pieces assembled to the device thereafter. The permanent magnets can be excluded from the clean room assembly area and this source of the most destructive particulate contamination are outside the head-disk enclosure.
摘要翻译： 用于将换能器相对于磁盘存储装置数据表面定位的致动器提供基本上密封的磁头 - 磁盘外壳，排除音圈电机永磁体。 安装法兰 - 内芯构件，端盖和套环和短路匝围绕传感器支架，音圈电机（VCM）的音圈和工作气隙提供密封外壳，其中永磁体和外芯片组装到装置 之后 永磁体可以从洁净室组装区域排除，并且最具破坏性的颗粒污染物的来源在磁头外壳外。
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公开(公告)号：US5812341A
公开(公告)日：1998-09-22
申请号：US861237
申请日：1997-05-21
CPC分类号： H02K1/2786
摘要： A rigid disk drive spindle motor includes a bobbin carried by the motor hub which has a permanent magnet attached to the inner cylindrical surface and a laminated back iron mounted at the outer cylindrical surface. The laminated back iron may be in the form of concentric cylinders or a spiral wound strip with adjoining cylinders or convolutions secured to and electrically separated from one another by an adhesive material. In another form, the back iron may be formed as a series of washer like rings mounted on the bobbin which is a configuration similar to the laminations used in the motor stator and would permit fabrication using the same manufacturing techniques. The back iron is formed of high resistance silicon steel so that both the back iron material and the laminated structure discourage Eddy current formation. The spiral wound embodiment may also be modified by having the spiral strip periodically, axially interrupted to further reduce undesired induced currents. Use of the bobbin serves to assure the concentricity of the closely adjoining stationary and rotary parts of the spindle motor and to facilitate easier manufacture and assembly. To further confine the magnetic fields, laminated fringe ring assemblies are provided at each axial end of the back iron structure. These assemblies are formed of washer like rings of permeable material that are secured to one another and electrically separated by adhesive material.
摘要翻译： 刚性盘驱动主轴电动机包括由马达轮毂承载的线轴，该线轴具有附接到内圆柱形表面的永磁体和安装在外圆柱形表面上的层叠后铁。 层压的后铁可以是同心圆筒形的形式，也可以是具有相邻的气缸或螺旋圈的螺旋缠绕的条带，其通过粘合剂材料固定并彼此电分离。 在另一种形式中，后铁可以形成为安装在线轴上的一系列垫圈，类似于在电动机定子中使用的叠片的构造，并且将允许使用相同的制造技术进行制造。 背铁由高电阻硅钢形成，使得后铁材料和层压结构都阻止涡流形成。 螺旋缠绕实施例也可以通过使螺旋带周期性地轴向中断以进一步减少不期望的感应电流而被修改。 线轴的使用用于确保主轴电机的紧密相邻的固定和旋转部件的同心度，并且便于制造和组装。 为了进一步限制磁场，在后铁结构的每个轴向端部设置层压边缘环组件。 这些组件由可渗透材料的垫圈形成，彼此固定并通过粘合剂材料电分离。
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公开(公告)号：US5818661A
公开(公告)日：1998-10-06
申请号：US689476
申请日：1996-08-08
CPC分类号： H02K1/2786
摘要： A rigid disk drive spindle motor includes a bobbin carried by the motor hub which has a permanent magnet attached to the inner cylindrical surface and a laminated back iron mounted at the outer cylindrical surface. The laminated back iron may be in the form of concentric cylinders or a spiral wound strip with adjoining cylinders or convolutions secured to and electrically separated from one another by an adhesive material. In another form, the back iron may be formed as a series of washer like rings mounted on the bobbin which is a configuration similar to the laminations used in the motor stator and would permit fabrication using the same manufacturing techniques. The back iron is formed of high resistance silicon steel so that both the back iron material and the laminated structure discourage Eddy current formation. The spiral wound embodiment may also be modified by having the spiral strip periodically, axially interrupted to further reduce undesired induced currents. Use of the bobbin serves to assure the concentricity of the closely adjoining stationary and rotary parts of the spindle motor and to facilitate easier manufacture and assembly. To further confine the magnetic fields, laminated fringe ring assemblies are provided at each axial end of the back iron structure. These assemblies are formed of washer like rings of permeable material that are secured to one another and electrically separated by adhesive material.
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公开(公告)号：US5550689A
公开(公告)日：1996-08-27
申请号：US512073
申请日：1995-08-07
IPC分类号： G11B19/20 , F16J15/43 , G11B25/04 , G11B33/14 , G11B17/028
CPC分类号： F16J15/43 , G11B25/043 , G11B33/1493
摘要： A magnetic fluid seal is provided by mounting an annular, axially polarized magnet mounted on the device base member and an annular ring pole piece with an inner diameter that cooperates with an outer diameter surface of the hub assembly to form a fluid gap that is radially outward and within the axial extent of the spindle bearings. The secondary gap 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.
摘要翻译： 通过安装安装在装置基座构件上的环形的轴向极化磁体和具有与毂组件的外径表面配合的内径的环形环极片来提供磁性流体密封，以形成径向向外的流体间隙 并在主轴轴承的轴向范围内。 密封组件的次级间隙在轴承组件的密封体积内，而主要密封间隙在轮毂组件内，以限制由高转速或冲击导致的任何碎屑或气溶胶被包含在可以重新捕获任何 磁性材料。 组件也固有地呈现有效的导电路径，以通过第二间隙中的磁性流体提供增强的旋转组件的接地，其不受由接合材料造成的损害。 密封组件设计还提供磁性流体的自载，而不允许模糊液体超出密封组件的区域。
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公开(公告)号：US4471395A
公开(公告)日：1984-09-11
申请号：US378967
申请日：1982-05-17
IPC分类号： G11B33/14 , G11B17/038 , G11B23/02 , G11B23/50 , G11B5/012
CPC分类号： G11B23/021 , G11B17/038 , G11B23/507
摘要： Shown and described is a recirculating air system for a disk drive assembly wherein air moves radially over the disk surfaces, over the transducer carriage at an increased velocity, past the actuator mechanism and through a filter before recirculation is induced by the hub assembly on which the disks are mounted and which functions also as an impeller. The hub-disk assembly also forms an integral part of the drive motor rotor assembly. Also, a breather filter and breather opening communicate with the recirculating air path at the low pressure location of the recirculating path to assure that air entering the system passes through the breather filter.
摘要翻译： 所示和描述的是一种用于磁盘驱动器组件的再循环空气系统，其中空气以增加的速度在传感器托架上方径向移动超过传感器托架，超过致动器机构并通过过滤器，在轮毂组件引起再循环之前， 盘被安装并且还用作叶轮。 轮毂盘组件也构成驱动电动机转子组件的组成部分。 此外，通气过滤器和通气开口在再循环路径的低压位置与再循环空气路径连通，以确保进入系统的空气通过通气过滤器。
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