Bus Bar Retention Snap for Load Center Base Pan
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Solution Overview
Problem
Conventional base pan configurations for load centers cause bus bars to be pulled out of their desired mounting position when wire connectors are tightened, due to the distance of wire connectors from the bus bar attachment points.
Innovation Solution
A retention snap arrangement with moveable arms and snap elements that form a channel to secure the bus bar, preventing upward movement by capturing the bus bar's edge and allowing insertion by deflecting to accommodate different bus bar widths and amperage capacities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wire connectors are tightened against the wire at a substantial distance from the bus bar attachment point, then the wire connector can be positioned for ease of access and operation, but the bus bar is undesirably pulled up and out of its desired mounting position
Solution Approach 1:
The retention snap applies a preliminary counteracting force to prevent the bus bar from moving upward when the wire connector is tightened. The snap element engages with the bus bar edge and deflects to provide resistance against upward movement, thereby counteracting the pulling force generated during wire connector installation.
Solution Approach 2:
The retention snap acts as an intermediary component between the bus bar and the wire connector assembly. It mediates the interaction by providing a mechanical constraint that allows the wire connector to be tightened without directly transmitting the pulling force to the bus bar mounting position.
2Stability of the object's composition
If the retention snap is designed to securely hold the bus bar, then the bus bar mounting position is stabilized, but the installation process becomes more complex
Solution Approach 1:
The retention snap incorporates a moveable arm with a snap element that can deflect between engaged and disengaged positions. This dynamic characteristic allows the snap to automatically engage with the bus bar edge during installation and provide secure retention, while also allowing for easy release if needed.
Solution Approach 2:
The retention snap is divided into distinct functional segments: the arm portion that provides leverage, the snap element that engages with the bus bar, and the mounting portion that attaches to the base pan. This segmentation allows each part to be optimized for its specific function while keeping the overall structure relatively simple.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively secures bus bars in place, preventing upward movement and allowing for a range of bus bar widths and amperage capacities, ensuring reliable connection and distribution in load centers.
Implementation Method 1
The first and second arms extend from the first and second walls, respectively, each forming a cantilever. In a first position, the first and second bottom surfaces are located above an edge of the bus bar for inhibiting movement of the bus bar. In a second position, the first and second bottom surfaces are not located above the edge of the bus bar to enable insertion of the bus bar in the channel.
Data Source
AI summary
A retention snap arrangement for attaching a bus bar to a base pan. The arrangement includes first and second walls for forming a channel for receiving the bus bar. The arrangement further includes a first moveable arm having a first snap element that includes a first bottom surface and a second moveable arm having a second snap element that includes a second bottom surface. The first and second arms extend from the first and second walls, respectively, each forming a cantilever. In a first position, the first and second bottom surfaces are located above an edge of the bus bar for inhibiting movement of the bus bar. In a second position, the first and second bottom surfaces are not located above the edge of the bus bar to enable insertion of the bus bar in the channel.