Disk Arm Damper Layout for Vibration Control and Disk Clearance
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Solution Overview
Problem
The challenge in manufacturing disk devices such as hard disk drives is the difficulty in setting a larger gap between dampers and magnetic disks, which can lead to manufacturing issues.
Innovation Solution
The solution involves designing arms with first and second depressions on each arm to accommodate first and second dampers, respectively, which are attached along these depressions to dampen vibration while maintaining a sufficient distance from the magnetic disks, allowing for accurate positioning of magnetic heads even at high recording densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a larger gap is set between the damper and the magnetic disk to prevent contact during vibration, then the reliability of the magnetic disk is improved, but the manufacturing precision deteriorates due to difficulty in maintaining consistent larger gaps
Solution Approach 1:
The patent transitions from controlling the gap distance (one-dimensional parameter) to controlling the positional relationship through centerline alignment (spatial dimension). By requiring the centerline of the damper to coincide with the centerline of the magnetic disk, the invention establishes a geometric constraint that is easier to manufacture and maintain than precise distance control, while still ensuring adequate clearance to prevent contact during vibration.
2Object-generated harmful factors
If the damper is positioned closer to the magnetic disk to improve vibration damping effectiveness, then the vibration damping performance is improved, but the risk of contact during vibration increases, worsening the reliability
Solution Approach 1:
The patent introduces the centerline alignment as an intermediary geometric constraint that mediates between the conflicting requirements of vibration damping effectiveness and contact prevention. By aligning the centerlines of the damper and magnetic disk, the system achieves optimal vibration damping through controlled positioning while the radial clearance naturally provides the safety margin needed to prevent contact during vibration excursions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively dampens arm vibrations, enabling precise positioning of magnetic heads and improving recording density in disk devices.
Implementation Method 1
The first dampers are configured to dampen vibration of the plurality of arms
Data Source
AI summary
A disk device according to one embodiment includes magnetic disks, arms each with a first depression, suspensions, and first dampers. The magnetic disks are aligned along a first rotation axis. The arms are aligned along a second rotation axis. Each arm includes a first side surface, a second side surface with a slit, a first surface, a second surface, a first seating surface, and a second seating surface. The first depression is open to the first side surface and the first surface, and located closer to the first rotation axis than the slit. Each of the suspensions is supported by the first seating surface or the second seating surface and partially accommodated in the slit. Each of the first dampers is attached to each of the arms along the first depression.