Shoulder Harness Intermediary Plate for Portable Machine Weight Distribution
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Solution Overview
Problem
Existing shoulder harnesses for portable working machines cause localized, imbalanced pulling forces on the operator's chest due to excessive movement of the hook and suspension belts or strings, leading to increased fatigue as the weight distribution becomes uneven.
Innovation Solution
A shoulder harness design featuring an intermediary member positioned between the harness network and the hanging element, allowing the hook to sway freely while distributing the weight more evenly and reducing localized pulling forces by acting as a fulcrum for the hip pad, thus alleviating torsion and deflection in the harness network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hook is directly connected to the harness network via suspension belts, then the working machine can be hung and carried, but excessive movement of the hook causes localized, imbalanced pulling forces on the operator's chest
Solution Approach 1:
The patent introduces an intermediary member (plate) positioned between the harness network and the hook. This plate acts as a mediator that receives the weight of the working machine and distributes it to multiple suspension belts, preventing the hook from directly transmitting excessive movement forces to any single point on the harness network or operator's chest.
2Adaptability or versatility
If the hook is allowed to sway freely to accommodate wide-range movements, then the working machine has greater mobility, but the weight distribution becomes uneven and operator fatigue increases
Solution Approach 1:
The plate member serves as a stable intermediary that maintains balanced weight distribution while allowing the hook to sway freely. The plate is connected to multiple suspension belts that can accommodate movement, yet the plate itself distributes the load evenly across these belts, preventing uneven weight distribution even when the hook moves through wide ranges.
3Force
If multiple suspension belts are used to distribute weight, then the load is dispersed, but the complexity of the harness network increases
Solution Approach 1:
The patent segments the weight distribution function by introducing a separate plate member that handles the load distribution task. This plate is then connected to multiple suspension belts, allowing the weight to be dispersed across multiple belts while keeping each individual connection simple. The complexity is managed by separating the distribution function into a distinct component rather than creating a complex interconnected harness network.
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 intermediary member effectively disperses the weight of the working machine across the harness network, reducing operator fatigue by minimizing localized pulling forces and allowing for a more stable and balanced distribution of weight, even during wide-range movements of the working machine.
Implementation Method 1
allowing the hook to sway freely while distributing the weight more evenly and reducing localized pulling forces by acting as a fulcrum for the hip pad
Data Source
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AI summary
A harness network (102) includes a back plate (112), right and left shoulder belts (114) and side-fitting belt (116) extending laterally along one side of the chest of an operator. The side-fitting belt (116) joins the front ends of the shoulder belts (114) in front of a central portion of the operator's breast. The intermediary plate (106) is connected to the harness network (102) via the holding member (120). The hook (110) for retaining the working machine is suspended on the intermediary plate (106).