Rotatable Compression Ground Contact for Bonding Block
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Solution Overview
Problem
Conventional electrical bonding blocks for grounding coaxial cables suffer from unreliable connections due to small contact areas and complex assembly processes, which can damage the ground wire and require additional components.
Innovation Solution
A bonding block with a rotatable compression ground contact mechanism, featuring a screw assembly with a contacting element that compresses the ground wire between flat surfaces, simplifying assembly and enhancing contact reliability by eliminating the need for separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw is used to ground the wire, then the grounding connection is established, but the contact area is small which may damage the ground wire and create unreliable connection
Solution Approach 1:
The contacting element is divided into multiple lobes (typically three lobes) that wrap around the ground wire, distributing the compressive force across multiple contact points rather than concentrating it at a single small area. This segmentation increases the effective contact area while maintaining reliable electrical connection.
Solution Approach 2:
The contacting element features a compressed resilient material with locally optimized properties - the material is soft enough to conform to and protect the wire surface, yet sufficiently resilient to maintain consistent contact pressure. The lobe structure creates localized high-contact-area zones that improve reliability without damaging the wire.
2Reliability
If an additional movable wedge component is added to increase contact area, then the contact area increases, but the assembly process becomes complicated requiring additional steps and components
Solution Approach 1:
The contacting element is integrated directly with the screw head as a single unified component. The lobed contacting element is formed as one piece with the screw, eliminating the need for separate movable wedge components and reducing assembly steps to simply inserting and tightening the screw.
Solution Approach 2:
The resilient lobed contacting element automatically adjusts and conforms to the wire geometry when the screw is tightened, creating its own optimal contact configuration without requiring additional adjustment steps or separate positioning components.
3Reliability
If a separate piece is attached to the screw to increase contact area, then the contact area increases, but the separate piece may be dropped or become lost
Solution Approach 1:
The contacting element and screw are manufactured as a single integrated component, eliminating the risk of the contacting element becoming separated or lost during assembly or operation. The unified structure ensures the grounding component remains permanently attached to the screw.
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 provides a secure, reliable electrical connection that reduces the risk of wire damage and simplifies the assembly process, ensuring effective grounding without additional steps or components.
Implementation Method 1
The screw assembly compresses a ground wire extending through the ground wire channel between the first contact surface and the second contact surface as the screw is tightened in the threaded hole
Data Source
AI summary
A bonding block has a block body configured to be secured to a structure, a threaded hole extending in an axial direction, and a ground wire channel extending through the threaded hole in a direction perpendicular to the axial direction. The bonding block also has a screw assembly having a screw and a contacting element having a substantially flat first contact surface. The contacting element is rotatable relative to the screw such that the contacting element traverses axially without rotating while the screw is tightened in the threaded hole. The block body has a substantially flat second contact surface positioned at a bottom of the threaded hole and the ground wire channel. The screw assembly compresses a ground wire extending through the ground wire channel between the first contact surface and the second contact surface as the screw is tightened in the threaded hole.