Busbar Cable Adapter With Keyed Latching for ORV3 Power Clips
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Solution Overview
Problem
Open Rack v3 (ORV3) server designs rely on a rear 48V/54V DC busbar infrastructure with floating busbar clips that lack inherent latching, necessitating a reliable and safe power connector for server chassis in bench environments.
Innovation Solution
A cable adapter with a latching mechanism is designed to secure the power connector to the server chassis, featuring a keying mechanism for polarity prevention and spring-loaded latch arms that engage with latching ribs or holes on the chassis to ensure proper connection and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a floating busbar clip design is used without inherent latching, then the device complexity is reduced and ease of manufacture is improved, but the reliability of the power connection deteriorates due to lack of secure latching
Solution Approach 1:
A cable adapter is introduced as an intermediary component between the power cable and the busbar clip. The adapter includes latch arms that engage with latching ribs on the busbar clip blades, providing the necessary securing function without modifying the simple floating busbar clip design. This mediator approach maintains the simplicity of the original design while adding the required reliability through the adapter's latching mechanism.
2Ease of operation
If no latching mechanism is provided on the busbar clip, then the ease of operation for connection is improved, but the safety deteriorates due to risk of accidental disconnection or polarity reversal
Solution Approach 1:
The cable adapter incorporates asymmetric keying features including a key slot on the adapter that receives a key rib on the busbar clip blade. This asymmetric design allows the adapter to be connected only in the correct orientation, preventing accidental polarity reversal. The latch arms are positioned asymmetrically to engage with specific latching ribs, ensuring proper alignment and connection safety while maintaining ease of operation through a simple connect-and-lock action.
3Reliability
If latch arms are added to secure the connection, then the reliability of the power connection is improved, but the device complexity increases
Solution Approach 1:
The cable adapter is segmented into distinct functional components: a body portion, multiple latch arms (first and second latch arms), and keying features. Each latch arm can be independently analyzed and manufactured. The segmentation allows the latching mechanism to be added as discrete elements rather than a complex integrated system, reducing overall device complexity while maintaining reliability through the distributed latching function across multiple independent arms.
Data Source
AI summary
A cable adapter for a server chassis is disclosed. The cable adapter comprises an adapter body having a first surface with a key slot. The key slot is configured to receive a key rib on a busbar clip of the server chassis. A pair of latches are pivotably attached to opposite sides of the adapter body. Each latch has a latch arm that extends across an open end of the adapter body when in a closed position. The latch arms are configured to engage one or more latching ribs on the blades of the busbar clip such as by hooking around the latching ribs. A pair of connectors inside the adapter body configured to engage blades of the busbar clip.