Rotating Welding Torch Power Connector for Cable Twist Relief
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Solution Overview
Problem
Conventional fixed connections in welding torch cables lead to torsional stress and mechanical failure due to rotational torque, especially in robotic welding systems, causing premature wear and electrical connection issues.
Innovation Solution
A rotating power connector that allows the welding torch body to rotate relative to the unicable while maintaining electrical contact, featuring a cylindrical housing with a connector pin and rotating stud, electrical contact rings with spring-loaded fins, and needle roller bearings for mechanical stability and smooth rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed connections are used in welding torch cables, then electrical connection is maintained, but torsional stress and mechanical failure occur due to rotational torque
Solution Approach 1:
The patent applies the dynamics principle by introducing a rotating connector assembly that allows the torch body to rotate relative to the unicable. The connector includes a rotating member with bearings that enable smooth rotational movement, transforming the static fixed connection into a dynamic rotating connection. This resolves the contradiction by allowing the electrical connection to remain reliable while accommodating rotational torque through controlled rotation rather than fixed resistance.
2Adaptability or versatility
If the torch body rotates during robotic welding, then welding flexibility is improved, but severe mechanical wear occurs on the fixed cable connections
Solution Approach 1:
The rotating connector assembly enables the torch body to rotate dynamically during robotic welding operations, improving welding flexibility and adaptability. The bearings in the rotating member support smooth rotation while the spring-loaded contact rings maintain continuous electrical contact throughout the rotation, preventing mechanical wear and connection failure.
Solution Approach 2:
The rotating connector assembly acts as an intermediary between the unicable and the torch body. It mediates the rotational movement by providing a dedicated rotating interface that isolates the unicable from direct rotational stress while allowing the torch body to rotate freely. The spring-loaded contact rings serve as intermediaries for electrical contact, maintaining connection through the rotation.
3Ease of manufacture
If fixed cable connections are used, then cable installation is simplified, but stress concentration leads to eventual failure of the electrical connection
Solution Approach 1:
The rotating connector assembly maintains ease of installation through its modular design that integrates into the existing torch structure. The rotating member with bearings and spring-loaded contact rings is assembled as a complete unit that replaces the fixed connection, keeping the installation process simple while fundamentally improving connection longevity through dynamic rotation capability.
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 stable electrical contact and reduces mechanical wear on the unicable by allowing rotation without twisting, thereby extending the life of the assembly and preventing premature failure.
Implementation Method 1
one or more contact extensions biased to contact the rotating stud
Implementation Method 2
needle roller bearings for mechanical stability and smooth rotation
Data Source
AI summary
A rotating power connection for connecting an electrical supply power cable to an electric welding torch body is provided. In the rotating power connection, the mechanical load is carried by steel bearings, and the electric load is carried by multi-contact, spring loaded fins made out of highly conductive materials or coatings. In some examples, a rotating power connector is affixed to a torch before the power connection to a wire feeder. The rotating power connector advantageously allows for rotation of the welding torch relative to the unicable while providing continual electrical connection at the high current levels employed in welding applications.