Twisted Disc Implement for Soil Cultivation and Residue Breakdown
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Solution Overview
Problem
Existing agricultural machines with obliquely positioned conical discs are ineffective in breaking up harvest residues and achieving substantial soil cultivation, while knife rollers struggle with depth penetration and soil irregularities.
Innovation Solution
A disc device with a twisted disc element, featuring protruding parts slit along its outer edge and twisted up to 60 degrees, combined with adjustable suspension and hydraulic depth control, allowing for efficient soil cultivation and residue breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If obliquely positioned conical discs are used for soil cultivation, then soil cutting and breaking effectiveness is improved, but harvest residue breakdown capability deteriorates
Solution Approach 1:
The disc element is segmented by slitting it at several places along its outer edge to form multiple protruding parts. This segmentation transforms a single solid disc into a multi-functional structure where each protruding part acts as an independent cutting or breaking element, enabling both soil cultivation and harvest residue breakdown
Solution Approach 2:
The protruding parts are twisted by approximately 60 degrees relative to the plane of the disc element, creating an asymmetric configuration. This asymmetry allows the protruding parts to engage with both soil and harvest residues effectively, providing dual functionality that symmetric designs cannot achieve
2Adaptability or versatility
If knife rollers are used for breaking up harvest residues, then residue threshing effectiveness is improved, but soil penetration depth capability deteriorates
Solution Approach 1:
The invention merges the functions of knife rollers (residue breaking) and oblique discs (soil cultivation) into a single hybrid disc device. The protruding parts on the disc element combine the cutting action of knives with the penetrating capability of discs, allowing simultaneous residue threshing and soil penetration without requiring separate implements
3Adaptability or versatility
If a single disc design is used for both soil cultivation and residue breakdown, then device versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The disc element can be manufactured by changing parameters such as heating the metal and plasticizing it, then pressing it into the desired twisted shape with protruding parts. This parameter-based manufacturing approach (using heat and pressure) simplifies production compared to traditional methods like welding protruding parts onto a disc hub
Data Source
AI summary
A disc device for an agricultural machine includes at least one disc implement, an arm, at one end of which the implement is journalled in bearings at an axle, and a bearing, which is arranged at the opposite end of the arm and is adapted to be fastened at a transverse beam on the frame of the agricultural machine. The disc device includes in the circumference direction of the disc implement mainly equally distributed, freestanding, out towards the periphery radially extending, protruding parts, wherein each protruding part has an outer edge, which extends in the range 15-75 degrees in relation to the plane of the disc implement.