Furrow Opener Wings Overlap Body to Block Soil
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Solution Overview
Problem
Current furrow openers with replaceable tips face issues with soil entering the interface between the tip and the body, leading to blockages in the product passageway, which can result in unseeded areas and reduced crop productivity due to the inability to deposit seed or fertilizer effectively.
Innovation Solution
The design incorporates a soil shield portion that extends upwardly alongside the side surfaces of the opener body, lengthening the path for soil to penetrate and diverting its trajectory, thereby minimizing soil penetration and plugging by increasing the overlap and reducing the gap width between the tip and opener body, ensuring granular products flow unimpeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the gap between the tip and opener body is minimized to block soil, then soil penetration is reduced, but manufacturing precision requirements increase due to casting tolerances
Solution Approach 1:
A soil shield portion is introduced as an intermediary element between the tip and opener body. This shield extends into the gap region and actively redirects soil flow away from the tip-body interface, serving as a mediator that manages soil penetration without requiring ultra-precise manufacturing tolerances.
Solution Approach 2:
The gap region is segmented into multiple zones: an upper region blocked by the soil shield, a middle region where soil is redirected, and a lower region near the tip interface. This segmentation allows each zone to handle soil differently, reducing the need for uniformly tight tolerances throughout the entire interface.
2Reliability
If the gap between tip and opener body is reduced to prevent soil entry, then product passageway blockage is reduced, but the complexity of the device increases due to additional shielding structures
Solution Approach 1:
The soil shield portion is merged with the existing tip structure, forming an integrated component rather than a separate attachment. The shield is formed as part of the tip body itself, combining the sealing function with the existing geometry to minimize additional complexity.
Solution Approach 2:
The soil shield is positioned locally at the critical interface region where soil penetration would cause blockage. Rather than adding shielding structures throughout the entire device, the shield is concentrated only where needed at the tip-body gap, providing targeted protection with minimal added complexity.
3Ease of manufacture
If conventional casting methods are used for manufacturing, then production cost is reduced, but the gap between parts is too large allowing soil to penetrate and plug the passageway
Solution Approach 1:
The soil shield portion is designed to protrude outward from the tip body into the gap region, effectively extracting or extending the blocking function beyond the basic tip geometry. This extraction allows the shield to intercept soil before it reaches the tip-body interface, compensating for larger casting tolerances.
Solution Approach 2:
The design changes the geometric parameters of the tip assembly by adding the soil shield extension. This parameter change (adding the shield height and overlap dimensions) transforms the system from one relying on tight gap tolerances to one that actively manages soil flow with a protruding shield element.
Data Source
AI summary
A furrow opener on an agricultural ground working implement has an opener body supported on a tool supporting shank of the implement and a replaceable furrowing tip body on the opener body. A delivery passage extends through the opener body and the tip body to deposit granular material in a furrow formed in the ground by the furrow opener. The tip body has a vertical knife portion and laterally protruding wings. Each wing further includes a soil shield portion projecting upwardly from the inner edge of the respective wing alongside the corresponding side surface of the opener body so as to resist penetration of soil into the chamber through a seam between the inner edge of the wing and the corresponding side surface of the opener body.