摘要:
An improved disk drive system that employs a lubricant with improved charge control is provided. The disk drive system is comprised of a rotatably mounted magnetic disk. A rotor is coupled to the disk and rotatably retained by a stator. A bearing is formed that serves as an interface between the stator and the rotor. A motor coupled to the rotor rotates the magnetic disk via the rotor. Located in the bearing is a lubricant having a low relative electrical permittivity.
摘要:
An apparatus and method for correcting single plane and coupled plane imbalance with a single mass in a hard disk drive. The method provides for measuring a single-plane imbalance of a hard disk assembly and for measuring a coupled-plane imbalance of the hard disk assembly. A greater imbalance from the single-plane imbalance and the coupled-plane imbalance is determined. A single mass is applied to the hard disk assembly to correct the greater imbalance.
摘要:
An apparatus and method for correcting static and dynamic imbalance with a single mass in a hard disk drive is disclosed. The method provides for determining a static imbalance of a hard disk assembly and for determining a dynamic imbalance of the hard disk assembly. A greater imbalance from the static imbalance and the dynamic imbalance is determined. A single mass is applied to the hard disk assembly to correct the greater imbalance.
摘要:
A disk clamp for securing data storage disks to the hub of a spindle motor in a hard disk drive has a circumferential rib protruding from a lower surface of the disk clamp. A complementary recess is formed in the hub of the spindle motor for closely receiving the rib on the disk clamp. The inner diameter of the rib and the outer diameter of the recess are closely toleranced to provide a very precise centering feature for mounting and aligning the disk clamp with respect to the hub and spindle motor. This design reduces the complexity of the tooling and fixtures required to complete the assembly and the overall part cost is reduced.
摘要:
An improved disk drive system that employs a lubricant with improved charge control is provided. The disk drive system is comprised of a rotatably mounted magnetic disk. A rotor is coupled to the disk and rotatably retained by a stator. A bearing is formed that serves as an interface between the stator and the rotor. A motor coupled to the rotor rotates the magnetic disk via the rotor. Located in the bearing is a lubricant having a low relative electrical permittivity.
摘要:
A method of enabling a reliable, motor-to-base merge process is designed for motors that are attached to a base with screws that mount from outside of the base. An assembly fixture receives the motor, which has a tooling hole for circumferentially locating the motor relative to the base. The assembly fixture closely receives the motor and has a tooling pin that engages the tooling hole to prevent rotation of the motor relative to the assembly fixture. During the motor-to-base merge process, the motor is inverted with the tooling pin in the tooling hole. The assembly fixture aligns the threaded screw holes in the motor with the mounting holes on the base.
摘要:
A device for centering and securing data storage disks to the hub of a spindle motor in a hard disk drive has a chamfer and a countersink on the top of the spindle motor shaft center. During the hard disk drive assembly process, a disk centering tool engages and uses these features to locate and center the disks that are installed on the spindle motor. The features are closely toleranced to provide a very precise centering feature for mounting and aligning the media disks with respect to the hub and the spindle motor. The present design reduces the complexity of the tooling and fixtures required to complete the assembly. As a result, the overall part cost is reduced and the manufacturing yield is improved.
摘要:
A balance clip in a hard disk drive spindle motor facilitates improved disk pack balance correction. The balance clip has one end that is offset from the semi-circular shape of the body of the balance clip. The offset end is located opposite the precise bent tab that provides tooling engagement in the balance clip. The offset end of the balance clip is offset at a radius that is less than the radius of the balance clip, or at a pre-determined, lesser radial offset from the original circular shape. Consequently, the cross-sectional edge of the clip at the offset end does not make contact with the surface of the groove in which the balance clip is seated. This design eliminates scratching between the offset end and motor hub, and thereby greatly reduces friction and particle generation during clip adjustment in the disk pack balancing process.
摘要:
A hard disk drive has a motor mounting bracket with mounting screws that attach from outside the drive and external to the seal with a screw bolt pattern diameter that is larger than an outer diameter of the motor hub. This configuration greatly reduces contamination inside the disk drive since all contaminants due to the screws are sealed from entering the disk drive. Consequently, the bottom of the mounting bracket is extended to the form factor limit to increase the internal space that is provided for the stator/winding of the motor. In relatively high platter count disk drives, the bottom disk is positioned very close to the motor bracket with this approach, which normally would cause the air drag to increase drastically and thereby impede the performance of the disk drive. Bosses may be used on the bracket to accommodate blind tap hole depths from the external surface of the bracket.
摘要:
A system and apparatus for enabling a reliable, motor-to-base merge process is designed for motors that are attached to a base with screws that mount from outside of the base. An assembly fixture receives the motor, which has a tooling hole for circumferentially locating the motor relative to the base. The assembly fixture closely receives the motor and has a tooling pin that engages the tooling hole to prevent rotation of the motor relative to the assembly fixture. During the motor-to-base merge process, the motor is inverted with the tooling pin in the tooling hole. The assembly fixture aligns the threaded screw holes in the motor with the mounting holes on the base.