Alignment Pin Retaining Mechanism for Split Chassis Assembly
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Solution Overview
Problem
The assembly of modular chassis components in Information Handling Systems (IHS) faces challenges due to misalignment caused by manufacturing tolerances and imperfections in the assembly table, leading to cross-threading and structural issues, which can result in permanent damage to the chassis and its components.
Innovation Solution
The implementation of alignment pins and retaining mechanisms, such as retaining plates and latches, that lock the alignment pins into seated positions, ensuring accurate alignment of assembly holes and allowing for proper fastening without cross-threading, using features like upper and lower protrusions or angled faces to secure the alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If modular chassis components are assembled using traditional alignment methods on an assembly table, then the assembly process is simple and quick, but misalignment occurs due to manufacturing tolerances and surface imperfections, leading to cross-threading and structural issues
Solution Approach 1:
The patent introduces alignment pins as intermediary elements that mediate between the first and second chassis components. These pins provide precise positioning references that eliminate misalignment caused by manufacturing tolerances and assembly table surface imperfections, ensuring accurate alignment while maintaining efficient assembly
Solution Approach 2:
The alignment pins are pre-installed on the chassis components before the assembly process begins. This preliminary action establishes precise alignment references in advance, allowing the components to be quickly and accurately positioned during assembly without requiring complex adjustment procedures
2Manufacturing precision
If alignment pins are used to ensure precise alignment, then alignment precision improves, but the device complexity increases due to additional components
Solution Approach 1:
The alignment system is segmented into separate, modular components: alignment pins attached to one chassis component and corresponding alignment slots in the other component. This segmentation allows each element to be independently manufactured and installed, simplifying the overall implementation while achieving precise alignment
Solution Approach 2:
The alignment pins and slots are strategically positioned at specific critical locations on the chassis components where precise alignment is most needed. This localized approach ensures high alignment precision at key interfaces without adding unnecessary complexity to the entire chassis structure
Data Source
AI summary
A modular IHS (Information Handling System) chassis system includes a first module and a second module. An alignment pin is fixed to the sidewall of the first module. An alignment slot is cut from the corresponding sidewall of the second module. The second module also includes a retaining mechanism that receives the alignment pin during assembly of the first module and the second module. The retaining mechanism locks the alignment pin into a seated position in the first alignment slot, thus preventing separation of the first module and second module during the assembly process. The retaining mechanism may be a retaining plate that includes upper and lower protrusions that extend into the alignment slot and lock the alignment pin in place. The retaining mechanism may also be a latch that opens by pushing the alignment pin into the alignment slot and closes to lock the alignment pin in place.