Torsion Bar Biasing Device for Agricultural Row Units
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Solution Overview
Problem
Existing biasing devices for row units in agricultural implements are complex, have a large number of parts, and are difficult to adjust, which complicates their functionality and effectiveness in applying sufficient pressure to the ground.
Innovation Solution
A simplified biasing device using a torsion bar with parallel torsion portions and a lever mechanism, where the torsion bar is arranged between a fixed and movable abutment, and a link arrangement with upper and lower link elements, allowing for adjustable biasing force and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional biasing devices are used, then sufficient biasing force can be applied, but the device complexity and number of parts increase
Solution Approach 1:
The patent combines the biasing function with the link arrangement structure itself. The link arrangement serves dual purposes: connecting the tool part to the transverse bar and providing the biasing mechanism through its geometric configuration and movement characteristics, eliminating the need for separate complex biasing devices while maintaining sufficient biasing force
Solution Approach 2:
The link arrangement is designed to perform multiple functions simultaneously: structural connection, force transmission, and biasing application. This multi-functional design reduces the overall number of components while ensuring the row unit receives adequate biasing force against the ground
2Force
If traditional biasing devices are used, then sufficient biasing force can be applied, but the number of parts increases
Solution Approach 1:
The biasing function is merged into the link arrangement structure. The link arrangement's geometric configuration and movement characteristics inherently provide the biasing mechanism, eliminating the need for separate springs, hydraulics, or other dedicated biasing components while maintaining sufficient biasing force
Solution Approach 2:
The link arrangement serves multiple functions including structural connection, force transmission, and biasing application. This multi-functional design significantly reduces the total number of parts while ensuring the row unit receives adequate biasing force against the ground
3Force
If traditional biasing devices are used, then sufficient biasing force can be applied, but the adjustment difficulty increases
Solution Approach 1:
The link arrangement is designed with dynamic characteristics that allow automatic adaptation to different ground conditions. The geometric configuration enables the system to self-adjust the biasing force based on the terrain and operational requirements, eliminating the need for manual adjustment mechanisms while maintaining effective biasing
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 solution provides effective resilient biasing of the tool part relative to the ground with fewer parts, enabling easy adjustment and a stronger biasing force, thus improving the operational efficiency of row units without the complexity of existing systems.
Implementation Method 1
a spring means arranged between a first abutment, which is fixed relative to the transverse bar, and a second abutment, which is movable relative to the transverse bar
Implementation Method 2
A simplified biasing device using a torsion bar with parallel torsion portions and a lever mechanism
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A row unit (1) to be attached to a transverse bar (2) of an agricultural implement (20) comprises a tool part (3) having at least one soil working part, and a biasing device (4) for biasing the tool part (3) against the ground, the biasing device comprising a spring means (5) arranged between a first abutment (6), which is fixed relative to the transverse bar (2), and a second abutment (7), which is movable relative to the transverse bar (2), and a link arrangement (13) adapted to be connected between the transverse bar (2) and the tool part (3), the link arrangement (13) extending substantially in the direction of travel of the row unit and the movable abutment (7) being attached to said link arrangement (13), the link arrangement (13) comprising an upper link element (14) and a lower link element (15), which are adapted to move parallel to each other, wherein the spring means (5) comprises a torsion bar (8) whose main extension is substantially parallel to the ground.