Welding Torch Drive Unit Axis Alignment
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Solution Overview
Problem
Handheld welding torches with integrated wire feed units suffer from increased weight, unfavorable ergonomic design, and thermal issues due to large and bulky drive units, which hinder handling and efficiency.
Innovation Solution
A handheld welding torch design with a gear stage and drive unit where the rotation axis aligns with the welding wire conveying axis, using a brushless external-rotor motor and a two-staged spur gear, allowing for a compact and ergonomic layout with the drive unit positioned outside the handle region to minimize heat transfer and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drive unit is integrated into the torch handle, then wire feeding function is achieved, but weight increases and ergonomics deteriorate
Solution Approach 1:
The drive unit is extracted from the handle region and positioned in the front region of the torch housing, separating the heavy component from the user's hand area. This extraction maintains the wire feeding function while reducing the weight burden on the operator.
Solution Approach 2:
The drive unit is arranged in the front region of the torch housing rather than within the handle, utilizing spatial redistribution in three-dimensional space. This dimensional repositioning allows the wire feed unit to be integrated without compromising handle ergonomics.
2Adaptability or versatility
If drive unit is placed in handle region, then wire feed unit integration is achieved, but heat transfer to hand increases
Solution Approach 1:
The drive unit generating heat is extracted from the handle region and relocated to the front region of the torch housing. This spatial separation removes the heat source from proximity to the user's hand, eliminating the harmful thermal effect while preserving wire feed functionality.
3Reliability
If drive unit is made large for integration, then wire feed function is reliable, but torch housing space requirements increase
Solution Approach 1:
The wire feed unit components are redistributed within the torch housing volume, with the drive unit positioned in the front region and the wire feed rollers arranged in the lower region. This spatial reorganization allows adequate component size for reliable operation without increasing overall torch housing volume.
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
This design results in a lighter, more ergonomic, and efficient welding torch with reduced thermal stress on the handle, enabling longer wire feeding distances and improved performance without obstructive elevations, achieving up to 50% weight reduction and enhanced wire conveying stability.
Implementation Method 1
a brushless external-rotor motor
Implementation Method 2
a two-staged spur gear
Implementation Method 3
a drive roller with a rotation axis and a counter roller with a rotation axis
Data Source
AI summary
A handheld welding torch for electric-arc welding with a melting welding wire has a wire feed unit for conveying the welding wire along a conveying axis arranged within a torch housing with a handle region, the wire feed unit including a drive unit with a rotation axis arranged vertically with respect to the conveying axis of the welding wire, a drive roller with a rotation axis and a counter roller with a rotation axis, and having a torch push-button. The wire feed unit has a gear stage and the rotation axis of the drive unit is arranged aligning with the conveying axis of the welding wire.