Agricultural Toolbar Support Adjustment With Eccentric Bushings
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Solution Overview
Problem
Existing agricultural implements suffer from assembly and fixing gaps between supports and toolbars, leading to vibrations, reduced productivity, and safety risks due to loose fasteners, primarily caused by imprecise manufacturing and welding of components.
Innovation Solution
An adjustment system with upper and lower support blocks and eccentric bushings that allow vertical movement to eliminate gaps, ensuring precise positioning and secure fastening of planting row units on toolbars using fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If supports are mounted on toolbars using conventional fastening methods, then assembly is simplified, but gaps between components are formed due to manufacturing variations, causing vibrations and fastener loosening
Solution Approach 1:
The mounting system incorporates movable mounting blocks that can shift position along the toolbar to compensate for dimensional variations. The blocks move vertically and horizontally within mounting guides to eliminate gaps between the support and toolbar, transforming a static rigid connection into a dynamic adaptive one that self-corrects assembly errors.
Solution Approach 2:
The system changes the positional parameters of the mounting blocks through controlled movement within the mounting guides. By allowing the blocks to move to different positions, the system adjusts the effective dimensions and alignment, compensating for manufacturing tolerances and eliminating gaps without requiring high-precision manufacturing.
2Manufacturing precision
If precise manufacturing and welding are used to eliminate gaps, then assembly precision is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of requiring high-precision static manufacturing, the system uses dynamic movable mounting blocks that can adjust their position during assembly and operation. This shifts the requirement from manufacturing precision to mechanical design complexity, which is more manageable and less costly.
Solution Approach 2:
The movable mounting blocks act as intermediary elements between the toolbar and the support. These intermediaries absorb dimensional variations and eliminate gaps, serving as a buffer that compensates for manufacturing tolerances without requiring the main components to be manufactured with high precision.
3Stability of the object's composition
If supports are fixed rigidly on toolbars, then structural stability is maintained, but vibrations from ground conditions cause fastener loosening and safety risks
Solution Approach 1:
The mounting blocks can move within the mounting guides in response to vibrations, allowing the system to dynamically adapt to ground conditions. This movement capability prevents stress concentration at fixed points, reducing the likelihood of fastener loosening while maintaining overall structural stability.
Solution Approach 2:
The movable mounting blocks provide a form of mechanical cushioning by allowing controlled movement before vibrations cause fastener loosening. The blocks can shift position to absorb vibration energy, preventing the harmful effect of vibration-induced loosening from occurring in the first place.
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
Eliminates assembly gaps, ensuring stable operation, improved productivity, and enhanced safety by preventing vibrations and fastener loosening.
Implementation Method 1
at least one of said support blocks comprises at least one opening for accommodating an eccentric bushing whose the passing hole is offset from the center of that bushing
Data Source
AI summary
An adjustment system for mounting and fixing a support on a toolbar of an agricultural implement includes an upper mounting assembly having an upper support block. The upper support block is configured to couple to the support via first fasteners, and the upper support block is configured to engage an upper mounting guide of the toolbar. The adjustment system also includes a lower mounting assembly having a lower support block. The lower support block is configured to couple to the support via second fasteners, and the lower support block is configured to engage a lower mounting guide of the toolbar. Furthermore, the adjustment system includes one or more eccentric bushings, and each eccentric bushing has a passing hole displaced from a center of the eccentric bushing. At least one support block has at least one opening, and a respective eccentric bushing is disposed within each opening.