Working Machine Harness Center of Gravity Positioning
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Solution Overview
Problem
Existing working machines with wearable harnesses experience degraded workability when the operation rod is tilted such that the front portion is higher than the rear, as the user's shoulder acts as a fulcrum, leading to inefficient tool operation.
Innovation Solution
A working machine design with a harness that positions the center of gravity on the first harness connector side of a plane perpendicular to the line connecting the harness connectors, ensuring the front portion of the operation rod is lower than the rear, enhancing user workability by leveraging gravitational force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operation rod is tilted such that the front portion is higher than the rear portion, then the working machine can be operated with a harness, but workability is degraded
Solution Approach 1:
The patent changes the physical parameter of the center of gravity position to resolve the contradiction. By positioning the center of gravity forward of the harness connector line, the gravitational force creates a moment that naturally tilts the operation rod to the desired angle (front portion lower than rear portion), improving workability while maintaining harness operation capability
Solution Approach 2:
The patent creates a balanced gravitational field effect by strategically positioning the center of gravity relative to the harness connectors. This creates a natural equilibrium position for the operation rod that aligns with the desired working angle, eliminating the need for active control or additional mechanical components
2Ease of operation
If the center of gravity is positioned forward, then the front portion of the operation rod is lower improving workability, but the harness connector positioning becomes more constrained
Solution Approach 1:
The patent applies local quality by specifically positioning the center of gravity in the forward region relative to the harness connectors. This localized gravitational effect creates the desired operation rod tilt without affecting other parts of the machine, and the harness connectors are positioned at specific locations (frontward and rearward of center of gravity) to achieve the optimal balance
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 configuration improves workability by ensuring the front portion of the operation rod is lower than the rear, reducing the likelihood of component collision and minimizing weight increase through strategic placement of connectors and materials, thus enhancing operational efficiency.
Implementation Method 1
since a downward force (that is, gravitational force) acts on the center of gravity of the working machine, the center of gravity serves as a point of effort
Data Source
AI summary
A working machine may include an operation rod; a tool disposed on a front portion of the operation rod; a prime mover configured to drive the tool; a first harness connector disposed frontward of a center of gravity of the working machine and configured to be connected to a first end of the harness; and a second harness connector disposed rearward of the center of gravity of the working machine and configured to be connected to a second end of the harness opposite to the first end. In a side view of the working machine, the center of gravity of the working machine may be positioned on a first harness connector side with respect to a plane that passes through a midpoint of a line connecting the first harness connector with the second harness connector and is perpendicular to the line.