Pivot Scraper for Coulter Disc Blade Deflection
Solution Overview
Problem
Disc openers in agricultural settings face reduced scraper effectiveness and debris accumulation due to deflection of the disc blade, causing a gap between the scraper and the disc, which reduces soil removal efficiency and consistency.
Innovation Solution
A scraper configured to pivot about an axis extending through the central portion of the disc blade, with a leading edge having both an upper and lower section that maintain contact with the disc blade during deflection, ensuring continuous soil removal and minimizing debris accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the disc is angled relative to the direction of travel to increase the width of the excavated trench, then the trench width is improved, but the scraper effectiveness is reduced due to disc deflection creating a gap between the scraper and disc
Solution Approach 1:
The scraper is made movable relative to the disc through a pivot mounting mechanism, allowing it to dynamically adjust its position and maintain contact with the disc surface despite deflection forces. This dynamic configuration enables the scraper to follow the disc's arcuate movement and remain effective throughout the cutting cycle.
Solution Approach 2:
The scraper's position and orientation parameters are changed through the pivot mechanism, allowing it to adapt to the changing geometric relationship between the scraper and disc during operation. This parameter adjustment maintains optimal contact and scraping effectiveness under varying disc deflection conditions.
2Length of moving object
If the disc is angled relative to the direction of travel to increase the width of the excavated trench, then the trench width is improved, but debris becomes lodged between the scraper and disc
Solution Approach 1:
The movable scraper design continuously adjusts its position to maintain clearance and contact with the disc, preventing debris from becoming lodged between the two components. The dynamic movement ensures that the scraper surface remains clear and effective despite the presence of soil and debris in the working environment.
3Device complexity
If a fixed scraper configuration is used, then the device complexity is low, but the scraper cannot maintain contact with the disc during deflection
Solution Approach 1:
The scraper mounting structure incorporates a pivot mechanism that adds controlled mobility to the system. This dynamic element allows the scraper to maintain reliable contact with the disc during deflection while adding minimal complexity to the overall device structure.
Solution Approach 2:
The scraper mounting system is divided into separate pivotable components that can move independently relative to each other and the disc. This segmentation allows the scraper to be decoupled from the disc assembly, enabling it to move freely to maintain contact without being rigidly constrained by the disc's position.
Data Source
AI summary
A scraper for a coulter assembly is provided. One coulter assembly includes a scraper having an upper leading edge section positioned adjacent to a central portion of a disc blade and configured to contact the disc blade while the disc blade is substantially undeflected, and a lower leading edge section positioned adjacent to an outer portion of the disc blade and configured to contact the disc blade while the disc blade is substantially undeflected. The upper leading edge section and the lower leading edge section are configured to maintain contact with the disc blade as the outer portion of the disc blade is deflected relative to the central portion of the disc blade along a substantially arcuate path.