Work Vehicle Lever-Potentiometer Layout for Accurate Position Sensing
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Solution Overview
Problem
Existing work vehicles with potentiometers positioned on the axis of manual operation members have an unused portion of the detection range, leading to inefficient use of the potentiometer's detection capabilities.
Innovation Solution
A work vehicle configuration with a manual operation member swingable about a first axis and a potentiometer with a detection arm swingable about a parallel second axis, where the second distance to the connection portion is shorter than the first distance, amplifying the operation of the manual operation member and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the potentiometer is positioned on the axis of the manual operation member, then the structure is simple and easy to manufacture, but the detection range is not fully utilized
Solution Approach 1:
The invention moves the potentiometer from the first axis (manual operation member axis) to a parallel second axis, creating a dimensional shift that enables lever arm amplification. This positional change in a different spatial dimension allows the detection arm to sweep through a larger angle while maintaining structural simplicity.
Solution Approach 2:
The detection arm acts as an intermediary between the manual operation member and the potentiometer. By positioning the potentiometer on a parallel axis, the detection arm translates the operation member's movement into amplified rotational motion, mediating the connection and enabling full utilization of the detection range.
2Measurement precision
If the detection arm operation angle is increased to utilize the full detection range, then the detection accuracy improves, but the device complexity increases
Solution Approach 1:
The detection arm serves as a mechanical intermediary that naturally amplifies the operation angle through its geometric configuration. This passive amplification mechanism achieves higher detection accuracy without requiring complex active control systems or additional sensors.
Solution Approach 2:
The invention changes the geometric parameters of the detection system by positioning the potentiometer on a parallel second axis with a shorter distance to the connection portion. This parameter change creates lever arm amplification that increases the detection arm's operation angle relative to the manual operation member's movement range.
3Device complexity
If the potentiometer is positioned closer to the axis, then the device complexity is reduced, but the detection sensitivity may decrease
Solution Approach 1:
The detection arm mediates between the compact potentiometer positioning and the need for high detection sensitivity. By positioning the potentiometer closer to the axis on the parallel second axis, the detection arm's lever arm effect amplifies the operation angle, compensating for the reduced distance and maintaining detection sensitivity.
Solution Approach 2:
The invention optimizes the geometric parameters by setting the second distance (from second axis to connection portion) to be shorter than the first distance. This parameter configuration creates mechanical amplification that maintains detection sensitivity while allowing compact potentiometer placement, thus reducing device complexity.
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 effective use of the potentiometer's detection range, allowing for accurate detection of the manual operation member's position, even with small operations, and reduces the risk of potentiometer damage by positioning them closer to the axis.
Implementation Method 1
The first axis and the second axis are located such that 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. This configuration 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
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AI summary
A work vehicle includes a manual operation member 12 swingable about a first axis P1 and a potentiometer 25 including a detection arm 25b swingable about a second axis P2 parallel to the first axis P1 and having a free end connected to the manual operation member 12 at a connection portion. The potentiometer 25 is configured to detect the position of the manual operation member 12 in response to the detection arm 25b swinging about the second axis P2 as a result of the manual operation member 12 swinging about the first axis P1. The second distance L2 from the second axis P2 to the connection portion is smaller than the first distance L1 from the first axis P1 to the connection portion.