Cable Backplane Tray Guide System for High-Density Assembly
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Solution Overview
Problem
High-density cable backplane systems face challenges in cost-effective and reliable assembly due to complex cable management, limited space, and difficulty in accessing components, particularly in designs where individual cable assemblies must independently reference a datum within the chassis, leading to issues with signal integrity and assembly complexity.
Innovation Solution
A cable backplane system with a chassis supporting a backplane, featuring upper and lower supports with guides, and a cable rack with trays that have frames surrounding raceways for cable connector assemblies, allowing for precise alignment and support of cables, which interact with corresponding chassis guides for easy loading and secure mounting, thereby simplifying assembly and improving signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If cable trays are stacked directly adjacent one another in high-density systems, then space utilization is improved, but access to components becomes difficult or impossible
Solution Approach 1:
The cable management system is divided into multiple stacked trays that are physically segmented yet functionally integrated. Each tray can be independently accessed through the guide system, allowing component maintenance without disrupting other trays. The segmentation enables vertical stacking for space efficiency while maintaining individual access paths through the guide structure.
Solution Approach 2:
The guide system acts as an intermediary mechanism between the stacked trays and the external environment. It provides a controlled access path that allows technicians to reach components on any tray level without having to disassemble the entire stacked structure, thus maintaining both compact arrangement and component accessibility.
2Manufacturing precision
If individual cable assemblies independently reference a datum within the chassis, then positioning precision is improved, but assembly complexity increases
Solution Approach 1:
The guide system serves multiple functions simultaneously: it provides the datum reference for positioning, guides the cable assemblies during installation, supports the trays mechanically, and ensures alignment with the backplane. This multi-functionality eliminates the need for separate positioning mechanisms, reducing assembly complexity while maintaining precision.
Solution Approach 2:
The guide system is pre-configured with the datum reference and alignment features during manufacturing. This preliminary action establishes the positioning precision before assembly begins, allowing cable assemblies to be simply guided into place without requiring complex measurement or adjustment procedures during the assembly process.
3Strength
If cable trays are made heavy to support cable connector assemblies, then structural strength is improved, but ease of support and positioning deteriorates
Solution Approach 1:
The guide system acts as a mechanical intermediary that supports the weight of heavy cable trays during installation and positioning. By transferring the load through the guide structure to the chassis, it eliminates the need for manual support of heavy trays, making installation easier while maintaining the structural strength required to support cable connector assemblies.
Solution Approach 2:
The guide system provides excessive support capability beyond what is strictly necessary for static support. This ensures that even very heavy trays can be easily positioned and installed without requiring proportionally heavy support structures, as the guide mechanism distributes and manages the loads efficiently during the installation process.
Data Source
AI summary
A cable backplane system includes a backplane and a chassis supporting the backplane. A cable rack is coupled to the chassis and backplane. The cable rack includes upper trays and lower trays each having a frame and cable connector assemblies held by the corresponding frame. The upper trays have upper tray guides configured to interact with corresponding upper chassis guides on the upper support for supporting the upper trays relative to the backplane. The lower trays have lower tray guides configured to interact with corresponding lower chassis guides on the lower support for aligning the lower trays to the backplane. The upper trays have upper hanging guides and the lower trays have lower hanging guides coupled to corresponding upper hanging guides to support the lower trays with the corresponding upper trays relative to the backplane.