Agricultural Row Unit Down Pressure Assembly with Torsion Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing down pressure systems for agricultural implements lack discrete adjustment capabilities and require frequent maintenance, particularly in the adjustment mechanism for torsional bias, which can be inconvenient and prone to environmental degradation.
Innovation Solution
A down pressure assembly featuring a torsion element with a fixed and adjustable mounting, an adjustment mechanism with detents for precise control, and a down pressure bar that applies a downward force, allowing for complete disablement and reduced maintenance needs, utilizing a coiled spring or elastomeric torsion element with a pivot shaft and extension arms for controlled rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a threaded stem and knob adjustment mechanism is used for down pressure bias, then adjustment capability is provided, but the mechanism requires lubrication and maintenance when exposed to the environment over time
Solution Approach 1:
The patent replaces the threaded stem and knob mechanical adjustment mechanism with a spring-loaded cam and follower system. The cam rotates on a pivot point and uses its contour shape to directly adjust the down pressure bias on the row unit. This eliminates threaded connections that require lubrication and reduces maintenance needs while maintaining adjustment capability through the cam's rotational movement.
Solution Approach 2:
The spring-loaded cam mechanism is designed to be self-lubricating through the use of low-friction materials and geometry. The spring provides continuous contact pressure between the cam and follower, ensuring consistent force transmission without requiring external lubrication. The system serves itself by using the spring force to maintain optimal contact and reduce wear over time.
2Measurement precision
If discrete adjustment indicators are added to the adjustment mechanism, then visual indication of adjustments is improved, but the device complexity increases
Solution Approach 1:
The patent incorporates color-coded indicators on the cam or associated components to show discrete adjustment positions. Different colors or color patterns indicate different down pressure settings, providing immediate visual feedback to the operator. This uses color coding rather than complex mechanical indicators or digital displays, maintaining simplicity while achieving precise visual indication.
3Adaptability or versatility
If the down pressure bias is made adjustable to completely disable torsional force, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent uses a dynamic cam mechanism where the cam's contour profile can be designed to provide different force characteristics at different rotational positions. By rotating the cam to specific positions, the operator can enable or disable the down pressure bias entirely. The spring-loaded design allows the cam to naturally return to neutral positions, providing automatic adaptability without complex control systems.
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
Enables precise and discrete adjustment of down pressure, reduces maintenance requirements, and allows for complete disablement of the torsional force, improving the operational efficiency and reliability of agricultural implements.
Implementation Method 1
at least one torsion element disposed on the frame, said torsion element having one fixed mounting to the frame and one adjustable mounting to the frame
Implementation Method 2
The torsion element can be disabled by releasing the torsion spring from pressure at the adjustable mounting
Data Source
AI summary
A down pressure assembly for incorporation into an agricultural implement to be pulled by a tractor (10) has an attachment frame (21) for attachment between a portion of the agricultural implement and at least two wheels (22) of a row unit (18) for traveling along the ground, the row unit (18) also having a tool (23) disposed between the two wheels (22) for engaging the ground, the down pressure assembly also having at least one torsion element (41, 50) disposed on the frame (21), with the torsion element (41, 50) having one fixed mounting to the frame (21) and one adjustable mounting to the frame (21), and the assembly further having an adjustment mechanism (37, 60) for varying the torsion of the torsion element (41, 50) at the adjustable mounting; and at least one down pressure member (36, 56, 57) for receiving a force from the torsion element to apply a downward force to the top members (26, 27) of the frame (21).