Server Chassis Self-Locking Tray Mechanism
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Solution Overview
Problem
Conventional server chassis designs are inconvenient for maintenance due to the need for a single operator to handle a heavy subsidiary tray and operate a latch, making it difficult to access and manage HDDs within the compact space.
Innovation Solution
A self-positionable and self-unlockable server chassis design featuring a first tray, a second tray, a position latch, and a position cam, where the trays are pivoted and the position cam rotates to engage and disengage the latch automatically, allowing for easy locking and unlocking without manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the subsidiary tray is fixed by a latch and arranged compactly in the drawer tray, then the HDDs can be arranged compactly to efficiently use space, but an operator cannot easily maintain the HDDs due to the heavy weight and difficulty of operating the latch
Solution Approach 1:
The position cam is designed to automatically engage with the protrusion on the position latch during the natural rotation of the first tray, causing the position cam to rotate and the engaging structures to automatically engage or disengage. This self-service mechanism eliminates the need for manual latch operation, allowing a single operator to easily maintain HDDs without having to manually operate the heavy subsidiary tray or the latch.
Solution Approach 2:
The position cam is designed with rotational freedom around a pivot axis, allowing it to dynamically rotate as the protrusion passes through its moving route. This dynamic rotation enables the engaging structures to automatically transition between engaged and disengaged states based on the tray's position, providing ease of operation while maintaining compact arrangement.
2Reliability
If a latch is used to fix the subsidiary tray, then the tray can be securely held in position, but a single operator finds it difficult to operate the latch on the heavy tray
Solution Approach 1:
The mechanism uses the natural motion of the first tray during insertion or removal to automatically drive the position cam, which in turn automatically engages or disengages the latch. The operator simply needs to move the tray, and the system self-performs the locking or unlocking action, eliminating the difficulty of manual latch operation on a heavy tray.
Solution Approach 2:
The position cam acts as an intermediary between the first tray and the position latch. It translates the linear or rotational motion of the tray into rotational motion that engages or disengages the latch. This intermediary mechanism provides reliable locking while requiring minimal effort from the operator.
3Ease of operation
If the subsidiary tray is raised to allow operator maintenance, then access to HDDs is improved, but the operator must handle the full weight of the loaded tray
Solution Approach 1:
The system separates the lifting function from the locking function. The first tray can be independently raised or lowered to provide access to HDDs, while the position latch and position cam mechanism independently handle the locking/unlocking. This segmentation allows the operator to raise the tray for maintenance without needing to simultaneously control the heavy locking mechanism.
Solution Approach 2:
The position cam automatically engages or disengages the latch during the tray's natural movement, requiring minimal force from the operator. This self-service locking mechanism reduces the effective effort needed to handle the heavy tray, as the locking system assists rather than hinders the operator's movements.
Data Source
AI summary
A server chassis includes a first tray, a second tray, a position latch and a position cam. The second tray and the first tray are pivoted with each other. The position latch is fixed on the first tray and moved accompany with the first tray. A protrusion and a first engaging structure are formed at an edge of the position latch. The position cam is pivoted on the second tray. An actuating nose and a second engaging structure are formed at an edge of the position cam. The actuating nose is located in a moving interval of the protrusion. The second engaging structure and the first engaging structure are contour matched with each other. Thereby, the position cam can be rotated to self-lock or self-unlock the position latch.