Harrow Tine Tip Reinforcement for Wear Resistance
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Solution Overview
Problem
Conventional harrow tines in soil cultivation devices experience wear and shortening due to high load, leading to impaired performance and reduced service life, especially on the lower penetration part.
Innovation Solution
The harrow tine features a reinforced tip with an elevation, providing increased resistance and maintaining shape, combined with a wedge-shaped design that penetrates the soil easily and minimizes lateral pressure, allowing for improved depth control and reduced plant damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the harrow tine uses a simple bent wire design, then the manufacturing cost is low and structure is simple, but the wear resistance at the lower penetrating part is poor leading to short service life
Solution Approach 1:
The harrow tine is divided into functionally distinct segments: an upper bearing leg for mounting, a middle section for flexibility, and a lower penetrating part with a reinforced tip for soil engagement. This segmentation allows each part to be optimized for its specific function, particularly the tip which is designed with enhanced wear resistance to extend service life without significantly complicating the overall structure.
Solution Approach 2:
The tip of the penetrating part is given special local quality through reinforcement design, making it more resistant to wear and deformation compared to the rest of the harrow tine. This localized enhancement focuses material and structural resources where they are most needed (at the soil-contact point) while keeping the rest of the structure relatively simple, thus extending service life without proportionally increasing overall complexity.
2Shape
If the harrow tine penetrating part has a simple shape, then the manufacturing is easy, but the shape retention is poor due to wear leading to impaired working quality
Solution Approach 1:
The tip geometry is locally optimized with a reinforced design that maintains its wedge shape even under wear conditions. The reinforcement features are designed to wear in a controlled manner that preserves the essential penetrating geometry, ensuring long-term shape retention without requiring complex manufacturing processes.
Solution Approach 2:
The tip is pre-formed with a reinforced geometry during manufacturing that anticipates future wear. The initial shape includes additional material at critical wear zones, creating a 'wear reserve' that maintains functional geometry throughout the service life, thereby ensuring consistent performance without requiring complex real-time adjustments.
3Force
If the harrow tine tip is sharp and pointed, then the soil penetration capability is high, but the lateral pressure increases causing soil smearing and erosion
Solution Approach 1:
The tip geometry employs asymmetric design elements where the wedge angle and reinforcement distribution are optimized to direct forces vertically into the soil for effective penetration while minimizing lateral soil displacement. The asymmetric reinforcement pattern helps channel soil particles downward rather than allowing them to smear laterally, reducing erosion.
Solution Approach 2:
The reinforced tip design serves multiple functions simultaneously: it provides sharp penetration capability, maintains shape retention under wear, and controls soil particle flow to minimize smearing. This multi-functional design achieves effective soil penetration while reducing harmful lateral pressure effects through integrated geometric features.
Data Source
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AI summary
A harrow tine for a soil cultivation implement comprising a base body (1) and a penetration part (2) arranged on the base body (1), wherein the penetration part (2) has a plate-shaped base with a tip which is reinforced at least in its front area by means of a projection having a larger cross-section than the plate-shaped base.