Toolbar Wheel Linkage for Narrow Row Spacing and Transport Stability
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Solution Overview
Problem
Existing planting implements face challenges in positioning wheel assemblies between row units due to insufficient distance, leading to interference and instability during transport and working configurations, particularly for narrow row spacing.
Innovation Solution
A linkage assembly is introduced that allows wheels to transition between working and transport positions, positioning the wheel pivot forward or rearward of the toolbar's longitudinal centerline, enabling tight row spacing without interference and enhancing stability during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If wheel assemblies are positioned between row units, then narrow row spacing is achieved, but wheel interference with row units occurs
Solution Approach 1:
The wheel assembly incorporates a linkage mechanism with pivot points that allow the wheel to dynamically change its longitudinal position relative to the toolbar. The linkage assembly includes a first link and second link that enable the wheel to move between a forward position (during planting) and a rearward position (during transport), resolving the conflict between narrow row spacing and wheel interference by making the wheel position adjustable rather than fixed
2Stability of the object's composition
If wheel assemblies are positioned rearward of the toolbar, then transport stability is improved, but upward loads on the work vehicle hitch increase
Solution Approach 1:
The linkage assembly enables dynamic repositioning of the wheel assembly along the longitudinal axis of the toolbar. During transport, the wheel can be positioned rearward to improve stability, while during planting operations, the wheel moves forward to reduce upward loads on the hitch. This dynamic adjustment resolves the contradiction between transport stability and hitch load reduction
3Force
If wheel assemblies are positioned forward of the toolbar centerline, then upward loads on the hitch are reduced, but transport stability decreases
Solution Approach 1:
The linkage mechanism with its mount, first link, and second link provides dynamic control over the wheel's longitudinal position. The system can shift the wheel forward of the toolbar centerline during planting to reduce upward hitch loads, then move the wheel rearward during transport to enhance stability, thereby resolving the trade-off between these two opposing requirements
Data Source
AI summary
A wheel assembly for an agricultural implement includes a linkage assembly having a mount configured to be non-rotatably coupled to a toolbar of the agricultural implement. The linkage assembly also includes a first link pivotally coupled to the mount and a second link pivotally coupled to the mount. Furthermore, the linkage assembly includes a wheel support pivotally coupled to the first link and to the second link, in which the wheel support is configured to rotatably couple to a wheel at a wheel pivot. The linkage assembly is configured to transition between a raised position and a lowered position to control a vertical position of the wheel pivot relative to the toolbar, and the linkage assembly is configured to position the wheel pivot at a first longitudinal location forward of a longitudinal centerline of the toolbar while in the raised position.