Frustoconical Bowl Scraper for Agricultural Wheel Mud Removal
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Solution Overview
Problem
Existing agricultural scraper designs for cleaning mud from ground-engaging wheels or discs are inefficient due to lack of effective scraping edges and adjustable positioning, leading to incomplete mud removal and increased maintenance needs.
Innovation Solution
A bowl-shaped scraper with a frustoconical peripheral wall and a support arm that allows for adjustable positioning and effective mud removal, featuring a sharpened edge and elongated slot holes for sliding adjustments, ensuring optimal contact with the ground-engaging members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional scrapers are used to clean mud from ground-engaging wheels, then the scraping function is provided, but the scraping effectiveness is insufficient due to lack of effective scraping edges
Solution Approach 1:
The scraper member is designed with a bowl-shaped body having a frustoconical peripheral wall that flares outward from a smaller end to a wider end. The frustoconical shape with its curved surface provides effective scraping action against the ground-engaging wheel, while the curvature allows the scraper to conform to the wheel surface for complete mud clearance.
Solution Approach 2:
The scraper member features an asymmetric design with a frustoconical peripheral wall that flares at a specific angle (30-60 degrees) from the axis. This asymmetric geometry creates a sharpened edge at the wider end that provides effective scraping action, while the asymmetric shape allows optimal positioning relative to the rotating wheel.
2Adaptability or versatility
If fixed-position scrapers are used, then the structure is simple, but the positioning cannot be adjusted for optimal contact with ground-engaging members
Solution Approach 1:
The support arm incorporates elongated slot-shaped holes that allow the scraper member to be positioned at multiple locations along the slot. This dynamic positioning capability enables adjustment of the scraper's rotational axis position to achieve optimal contact with the ground-engaging wheel, while the slot mechanism provides a simple yet effective adjustment system.
3Reliability
If scrapers are not rotatably supported, then the structure is simpler, but the scraping action is less effective for removing mud buildup
Solution Approach 1:
The scraper member is rotatably supported on the support arm about a rotational axis that passes through the support arm. This rotation capability allows the scraper to effectively engage with and remove mud buildup from the ground-engaging wheel, while the rotational support mechanism remains relatively simple in design.
Data Source
AI summary
A scraper employs a support arm for mounting to a frame of an agricultural implement and a frustoconically bowl-shaped scraper member rotatably supported on the support arm in a position facing the open end of the bowl toward a ground-engaging wheel or disc. Different embodiments disclose unique mounting arrangements, including embodiments where a bearing has its outer race affixed to a closed end wall of the bowl, a bushing is fastened between the inner race of the bearing and a support arm situated outside the bowl to support the bowl in a manner rotatable about the bushing at an axial distance from the support arm, and a separate outer sleeve is disposed around the bushing in a freely rotatable manner to prevent wrapped straw accumulation between the bowl and the support arm during rotating use of the scraper.