Rack-Chassis Interlock System to Prevent Multi-Chassis Tipping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In systems with multiple rack-mounted devices, the partial insertion of chassis during service or seismic events can create a tipping moment that threatens the stability of the rack, as each chassis may be partially inserted, potentially causing the rack to topple.
Innovation Solution
An interlock system that limits the number of chassis that can be partially removed from the rack by using blocks and hooks, where the removal of one chassis triggers the engagement of blocks in front of the remaining hooks, preventing further chassis from being partially removed and thus stabilizing the rack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple chassis are partially removed from the rack for service or installation, then accessibility and ease of operation are improved, but the stability of the rack deteriorates due to tipping moments
Solution Approach 1:
The interlock system is pre-configured with blocks and hooks that automatically engage when a chassis is removed. The blocks are positioned in advance to block the hooks, creating a preliminary mechanical constraint that prevents multiple chassis from being partially removed simultaneously. This preliminary action ensures rack stability is maintained before any instability can occur.
2Stability of the object's composition
If an interlock system with blocks and hooks is implemented to prevent multiple chassis removal, then rack stability is improved, but device complexity increases
Solution Approach 1:
The interlock system is segmented into multiple independent block-hook pairs, with each pair corresponding to a specific chassis slot. Each block is associated with a specific hook, creating modular units that can be independently analyzed and manufactured. This segmentation simplifies the overall design by breaking down the complex interlock mechanism into manageable, repeating elements.
Solution Approach 2:
The blocks serve as intermediary elements between the chassis and the rack structure. When a chassis is removed, the blocks automatically engage with the hooks as intermediary components to prevent other chassis from being partially removed. This intermediary mechanism provides a simple mechanical solution that avoids complex electronic sensors or control systems.
Data Source
AI summary
An interlock system is provided that limits the ability of a user or seismic event to dislodge or partially remove more than one chassis from a rack at any one time. Thus, embodiments reduce the potential for the rack to be toppled by the weight of too many chassis extending from the rack at the same time. The interlock system includes a dynamic rail with locking blocks that move to engage hooks on the rear of the chassis. A trigger at each chassis slot is depressed with installation of a chassis. Upon the removal of any chassis, the associated trigger extends and causes the dynamic rail to be pulled down into a locking position in which the locking blocks engage the hooks on the remaining chassis, which prevents their removal.