Work Vehicle Control Lever Linkage for Wider Potentiometer Range
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Solution Overview
Problem
Existing work vehicles with potentiometers to detect manual operation members do not effectively utilize the full detection range, leading to inefficiencies and inaccuracies in position detection.
Innovation Solution
A configuration where a potentiometer with a detection arm, swingable about a second axis parallel to the manual operation member's axis, is positioned to amplify the operation angle, allowing for more effective use of the detection range and improved accuracy in detecting the position of the manual operation member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the potentiometer is positioned on the axis of the manual operation member, then the detection range is maximized, but the operation range cannot be fully utilized leading to unused detection range
Solution Approach 1:
The patent introduces a second axis parallel to the first axis (manual operation member axis) and positions the potentiometer's detection arm to swing about this second axis. By offsetting the second axis from the first axis, the detection arm traces a larger circular arc, thereby expanding the detection range without requiring the potentiometer to be positioned directly on the manual operation member axis.
2Device complexity
If the manual operation member has a small operation angle, then the structure is compact, but the detection accuracy is reduced
Solution Approach 1:
The patent introduces the detection arm as an intermediary element between the manual operation member and the potentiometer's measurement mechanism. The detection arm amplifies the small operation angle of the manual operation member by tracing a larger circular arc around the offset second axis, thereby converting a small input angle into a larger detection angle without compromising structural compactness.
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 enhances the accuracy of detecting manual operation member positions and reduces the unused portion of the potentiometer's detection range, enabling precise operation even with small movements.
Implementation Method 1
a second distance from the second axis to the connection portion is smaller than a first distance from the first axis to the connection portion... allows the operation of the manual operation member to be amplified before being transmitted to the detection arm, increasing the operation angle of the detection arm
Data Source
AI summary
A work vehicle includes a manual operation member swingable about a first axis and a potentiometer including a detection arm swingable about a second axis parallel to the first axis and having a free end connected to the manual operation member at a connection portion. The potentiometer is configured to detect the position of the manual operation member in response to the detection arm swinging about the second axis as a result of the manual operation member swinging about the first axis. The second distance from the second axis to the connection portion is smaller than the first distance from the first axis to the connection portion.