Rotating Drive Tray Assembly for Space-Saving HDD Mounting
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Solution Overview
Problem
Existing computer chassis designs face limitations in space utilization due to the longitudinal space occupied by drives, drive trays, and drive backplanes, which restricts the installation of other components and cable management within the chassis.
Innovation Solution
A drive tray assembly that allows drives to be oriented perpendicularly within the chassis, utilizing a rotatable outer tray and a slidable inner tray mechanism, enabling tool-free installation and removal, and incorporating retention pegs for secure alignment and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HDD trays are oriented longitudinally parallel to the y-axis to maximize drive installation through the front, then the number of HDDs that can be installed is improved, but the y-axis space occupied by trays and backplane increases significantly
Solution Approach 1:
The patent rotates the drive tray assembly from a longitudinal orientation (parallel to y-axis) to a perpendicular orientation (aligned with x-axis). This dimensional change allows drives to be installed through the front while occupying minimal y-axis space, as the tray extends horizontally rather than vertically along the chassis depth.
Solution Approach 2:
The drive tray assembly incorporates a rotatable outer tray that can rotate between an open position (for access) and a closed position (for installation). This dynamic mechanism enables the tray to transition between operational states while maintaining a compact footprint when closed, resolving the space occupation issue.
2Ease of operation
If the outer tray is made rotatable for easy drive access, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The drive tray assembly is divided into distinct functional segments: an outer tray for rotation and access, an inner tray for drive placement, a lever for actuation, and a handle for operation. This segmentation allows each component to perform its specific function independently, simplifying the overall mechanism while maintaining ease of operation.
Solution Approach 2:
The lever mechanism is designed to automatically engage and disengage the inner tray from the outer tray through simple rotational motion. The handle and lever work together to provide tool-free installation and removal, making the system self-servicing without requiring complex locking mechanisms or additional tools.
3Ease of operation
If the inner tray is made slidable for tool-free installation, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The lever acts as an intermediary mechanism between the handle and the inner tray. Instead of requiring direct precise sliding, the lever translates simple handle motion into controlled inner tray movement. This intermediary mechanism reduces the precision requirements of the sliding interface while maintaining ease of operation.
Solution Approach 2:
The inner tray is pre-positioned in a disengaged state within the outer tray, with alignment features already in place. The sliding interface is pre-configured with guide rails and retention pegs that ensure proper alignment during insertion. This preliminary preparation reduces the precision requirements during actual installation, as the components are designed to self-align.
4Reliability
If retention pegs are added for secure alignment, then the reliability of drive fixation is improved, but the device complexity increases
Solution Approach 1:
The retention pegs are integrated directly into the inner tray structure, merging the fixation function with the tray itself rather than adding separate components. The guide rails are also combined with the tray assembly, creating a unified structure that provides both alignment and retention functions without increasing overall complexity.
Data Source
AI summary
A drive tray assembly is disclosed for placing drives (e.g., hard disk drives) in a computer chassis in a rotated orientation and without the need for additional tools. The drive tray assembly includes an outer tray on a hinge capable of being rotated away from the computer chassis during drive changes. An inner tray, upon which a drive may be placed, is coupled to the outer tray. When the outer tray is moved to a closed position within the computer chassis, pressing on a handle can cause the inner tray to move from a disengaged position to an engaged position, thus connecting the drive to a drive backplane within the computer chassis.