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1. 发明授权

US4346416A Rotary actuator assembly for disk drive head positioner 失效
标题翻译：用于磁盘驱动器头定位器的旋转执行器组件
公开(公告)号：US4346416A
公开(公告)日：1982-08-24
申请号：US126129
申请日：1980-02-29
申请人： Charles M. Riggle , John D. Read , William B. Noe , Richard Winfrey , Christopher A. Pollard , Frank W. Bernett
发明人： Charles M. Riggle , John D. Read , William B. Noe , Richard Winfrey , Christopher A. Pollard , Frank W. Bernett
IPC分类号： H02K35/00 , G11B5/55 , G11B21/02 , H01F7/14
CPC分类号： H01F7/14 , G11B5/5521
摘要： A rotary actuator assembly for positioning read/write heads in disk drive mass storage systems. The actuator assembly includes an actuator motor and one or more actuator arms secured thereto. The motor provides rotary motion of the arms, to move the heads. The stator magnet of the motor is an electromagnet wound on an arcuate core; a pair of elongate permanent magnets are attached to the rotor member, for coaction with the stator magnet. The rotor member has a U-shaped cross sectional area in a plane perpendicular to its axis of rotation; the permanent magnets are fixed to the outside, bottom corners of the U and the actuator arms are mounted across the open end of the U. The rotor is of a very small radius, to minimize inertia. The permanent magnets have a flat face facing the stator, with a channel running longitudinally down the middle, to minimize flux density variations in the permanent magnet-coil gap. The rotor balances the arm relative to the rotor's axis. The arms are of a substantially symmetrical tapered truss design, presenting low inertia; each is cantilevered to the rotor by one bolt which is passed through and pulls the arm against the rotors. Additionally, a spirol-type cylindrical spiral spring, received in a slot in the arm, prevents lateral slippage of the arm relative to the rotor. A pair of cantilevered leaf spring crash stops fixed to the stator decelerate the rotor at the ends of its range of travel.
摘要翻译：用于将读/写头定位在磁盘驱动器大容量存储系统中的旋转致动器组件。致动器组件包括致动器马达和固定到其上的一个或多个致动器臂。电机提供臂的旋转运动，以移动头部。电动机的定子磁体是缠绕在弧形芯上的电磁体; 一对细长永久磁铁连接到转子构件上，用于与定子磁体共同作用。转子构件在与其旋转轴线垂直的平面中具有U形横截面积; 永磁体被固定到外部，U的底角和致动器臂跨越U的开口端安装。转子具有非常小的半径，以最小化惯性。永磁体具有面向定子的平坦面，通道沿中间纵向延伸，以最小化永磁体线圈间隙中的通量密度变化。转子相对于转子的轴平衡臂。臂具有基本对称的锥形桁架设计，呈现低惯性; 每个通过一个螺栓悬挂在转子上，螺栓穿过并将臂拉向转子。此外，容纳在臂中的槽中的螺旋形圆柱形螺旋弹簧防止臂相对于转子的侧向滑动。固定在定子上的一对悬臂弹簧碰撞止动器在其行程范围的末端减速转子。

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