Disk Drive Suspension Damper for Flexure Wobble Control
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Solution Overview
Problem
Existing disk drive suspensions face challenges in suppressing flexure wobbling while maintaining low rigidity, which affects gimbal movement precision and recording density.
Innovation Solution
A suspension design incorporating first and second damper members attached to the load beam, with branch portions extending through openings to interpose between the damper members and the flexure, providing viscoelastic material layers for effective vibration damping without increasing rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a damper member is attached to the outrigger to suppress wobbling of the flexure, then the wobbling of the flexure is suppressed, but the rigidity of the flexure is increased
Solution Approach 1:
The damper member is divided into multiple independent damping portions (first damping portion and second damping portion) that are attached to different locations on the load beam. Each damping portion independently suppresses vibrations, allowing effective wobbling suppression while distributing the rigidity impact across multiple attachment points rather than concentrating it on the outrigger structure.
Solution Approach 2:
The damper member is attached to the load beam (an intermediary structure) rather than directly to the outrigger. The load beam acts as a mediator that transmits damping forces to suppress flexure wobbling without directly increasing the rigidity of the flexure assembly, as the damping action is applied at a different structural level.
2Stability of the object's composition
If the rigidity of the flexure is increased to suppress wobbling, then the wobbling is reduced, but the gimbal movement is adversely affected
Solution Approach 1:
The damping function is segmented into multiple independent damping portions attached to different locations on the load beam. This segmentation allows vibrations to be suppressed at multiple points along the flexure structure without creating a single rigid constraint that would interfere with the gimbal's natural movement characteristics.
Solution Approach 2:
The load beam serves as an intermediary structure that provides vibration damping without directly constraining the gimbal mechanism. By attaching dampers to the load beam rather than to components directly involved in gimbal movement, the system achieves wobbling suppression while preserving the ease of gimbal operation.
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
Effectively suppresses flexure wobbling and maintains low rigidity, enhancing gimbal movement precision and recording density by converting vibration energy into thermal energy through internal resistance.
Implementation Method 1
providing viscoelastic material layers for effective vibration damping
Implementation Method 2
convertting vibration energy into thermal energy through internal resistance
Data Source
AI summary
A suspension for a disk device includes a load beam, a flexure and first and second damper members. The load beam includes a first surface, a second surface and first and second openings. The flexure includes first and second outriggers. The first outrigger includes a first branch portion through the first opening, a distal end thereof being interposed between the second surface and the first damper member. The second outrigger includes a second branch portion through the second opening, a distal end thereof being interposed between the second surface and the second damper member.