Digging Implement Plug Transverse Welding for Shock Load
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Solution Overview
Problem
Digging implements used for tough materials like hardened clay or stony ground face rapid weld failure due to high shock loading, as existing welds are subjected to longitudinal shear stress, limiting their durability and effectiveness.
Innovation Solution
A digging implement design featuring a plug with precision-fitting sections that distribute impact forces transversely, providing a larger weld surface area and using multiple physical connections to enhance strength, including a sliding hammer mechanism that transfers forces directly to the implement head, reducing longitudinal stress on the shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If re-enforced welds with large weld surface areas are used, then weld strength is improved, but the welds are still subjected to longitudinal sheer stress which reduces their effectiveness
Solution Approach 1:
The patent inverts the conventional longitudinal weld arrangement by using transverse welds that run perpendicular to the direction of impact force. This inversion allows the welds to resist shock loading more effectively, as transverse welds are substantially stronger than longitudinal welds when subjected to forces along the length of the shaft.
Solution Approach 2:
The patent transitions from a one-dimensional longitudinal weld arrangement to a two-dimensional transverse weld configuration. By positioning welds at right angles to the force direction and distributing them around the shaft circumference, the solution adds dimensional complexity that enables better stress distribution and resistance to shock loading.
2Area of stationary object
If the available contact area of the shaft is used for welding, then weld surface area is increased, but the welds remain vulnerable to longitudinal shear stress
Solution Approach 1:
Instead of welding along the longitudinal axis of the shaft, the patent inverts the weld orientation to run transversely across the shaft. This allows the full contact area of the shaft to be utilized for welding while the transverse orientation ensures the welds are positioned to resist shock loading forces effectively.
3Reliability
If a plug structure with precision fit is used, then impact forces are distributed transversely, but the device complexity increases
Solution Approach 1:
The patent segments the connection system into distinct components: a plug fitted into the shaft and a head attached to the plug. This segmentation allows the plug to serve as an intermediary that distributes impact forces transversely across multiple weld points, improving robustness while keeping each individual component relatively simple in design.
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 design significantly improves the robustness and durability of digging implements by distributing impact forces transversely, reducing weld failure and maintaining performance in hard conditions.
Implementation Method 1
A digging implement design featuring a plug with precision-fitting sections that distribute impact forces transversely, providing a larger weld surface area and using multiple physical connections to enhance strength
Implementation Method 2
including a sliding hammer mechanism that transfers forces directly to the implement head, reducing longitudinal stress on the shaft
Data Source
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AI summary
An implement including: - a shaft; - a plug; - a tool portion, the implement characterised in that the plug is received and retained at one end of the shaft and wherein the plug and/or the tool portion are adapted to engage with one another.