Modular Harrow Disc Assembly for Weld-Free Soil Conditioning
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Solution Overview
Problem
Existing harrow devices face issues with improper removal of weeds and stubble, frequent jamming, breakage due to high tension and stress, complex construction leading to high costs and impractical replacement, and the need for multiple units for conditioning and leveling.
Innovation Solution
A harrow device with a simple construction featuring flexible cables and removable harrow discs, allowing single-step soil conditioning and leveling, reducing stress on parts, and enabling easy assembly and replacement without welding, using connecting members like flexible cables or crossheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welded links are used to join harrow discs, then the structure is strong and stable, but the replacement becomes complex and time-consuming requiring cutting and welding
Solution Approach 1:
The harrow disc assembly is segmented into modular components: the disc plate, connecting members, and links are separate replaceable parts. This allows individual components to be replaced without affecting the entire structure, eliminating the need for welding while maintaining structural integrity through standardized connection interfaces.
Solution Approach 2:
The connection system transitions from static welded joints to dynamic removable connections using connecting members that pass through aligned holes in the disc plate and links. This enables quick assembly and disassembly while maintaining strength during operation through proper mechanical fastening.
2Adaptability or versatility
If multiple harrow units are used for conditioning and leveling, then the functions are performed adequately, but the device complexity and cost increase
Solution Approach 1:
The harrow disc assembly is designed as a universal module that can perform multiple soil preparation functions. By adjusting the configuration and arrangement of the disc plates and connecting members, the same basic structure can serve for both conditioning and leveling operations, eliminating the need for separate specialized units.
3Ease of operation
If complex tensioning assemblies with multiple parts are used, then the harrow discs are properly tensioned, but the parts are subjected to high stresses leading to breakage
Solution Approach 1:
The complex multi-component tensioning assembly is extracted and replaced with a simplified system using resilient means such as springs or elastic elements integrated into the connection structure. This reduces the number of parts subjected to high stresses and eliminates the vertical column and arm structure that were prone to breakage.
4Strength
If welded construction is used for harrow discs, then the structure is strong, but the manufacturing cost and production time increase
Solution Approach 1:
The harrow disc is segmented into separately manufacturable components (disc plate, connecting members, links) that can be produced independently using standard machining operations. This eliminates costly welding operations while maintaining structural strength through precision-machined connection interfaces and proper fastening mechanisms.
Data Source
AI summary
A harrow device for the conditioning and leveling of sowing soils in a single step, and a disc for the harrow, which allows these processes to be carried out in the proper way, guaranteeing a better quality of subsequent sowing, and also preventing premature wear of parts, jamming of materials, and/or emergency stops, and which, in turn, is constituted and built in a simple way, in order to reduce costs and facilitate both its realization and its replacement.