Elastic Press Wheel for Seeder Furrow Guidance
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Solution Overview
Problem
Existing seed pressure rollers face issues with sticking or blocking in sticky soil conditions and unwanted deformation in non-rectangular furrows, leading to poor guiding and self-cleaning properties, especially when cornering or in wet conditions.
Innovation Solution
A pressure roller with a smaller tire cross-section, featuring radially and laterally elastic properties, is designed with web elements and an elastic filler material to ensure form-fitting connections, allowing for improved guidance and self-cleaning, and a hollow tire chamber for even seed distribution and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid rim body with a clamping groove for the tire is used, then the pressure roller can be constructed with a defined structure, but unwanted deformation of the hollow tire occurs leading to poor guiding and self-cleaning properties
Solution Approach 1:
The patent replaces the rigid rim body with a flexible tire structure that has elastic properties. The tire is designed with a specific aspect ratio (height/width ≤ 1:1) and is mounted on a rim without a clamping groove that would restrict deformation. This flexible structure allows the tire to adapt to non-rectangular furrow cross-sections and provides self-cleaning through elastic deformation during rotation, resolving the contradiction between structural stability and operational flexibility.
Solution Approach 2:
The patent changes the geometric parameters of the tire, specifically setting the height/width ratio to 1:1 or smaller (wider than high). This parameter change allows the tire to better conform to the furrow cross-section while maintaining stability, and enables improved guiding properties through controlled deformation during operation.
2Adaptability or versatility
If the pressure roller is designed to fold up or be removed in wet and sticky floor conditions, then adaptability to difficult soil conditions is improved, but device complexity and ease of operation are reduced
Solution Approach 1:
The patent designs the pressure roller to automatically adapt to different soil conditions through the elastic deformation of the tire structure itself, without requiring manual intervention to fold or remove components. The tire's inherent elasticity provides self-cleaning action and automatic adaptation to wet or sticky conditions, maintaining simplicity while improving adaptability.
3Ease of operation
If an elastic hollow tire with length-width ratio of at least 2:1 is used, then self-cleaning flexing effect is achieved, but the tire cannot be guided cleanly over deposited seeds and comes out of the furrow cross-section
Solution Approach 1:
The patent inverts the aspect ratio parameter from the prior art (length-width ≥ 2:1) to a height/width ratio of 1:1 or smaller (wider than high). This parameter change allows the tire to maintain self-cleaning through elastic deformation while providing better lateral stability and guiding properties, preventing the tire from coming out of the furrow cross-section during operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides enhanced guiding and self-cleaning capabilities, ensuring precise seed placement and stability even in challenging conditions, while being durable and cost-effective to produce.
Implementation Method 1
ensures elastic deformation between the tire element and the hub laterally and/or radially to the running axis of the pressure roller
Implementation Method 2
a flattening of the tire onto its contact surface in the furrow is achieved directly at the bottom of the furrow by designing the tire with at least one elastic hollow chamber, which ensures safe braking of the deposited tires Grains and an even pressure on them is guaranteed
Data Source
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AI summary
The invention relates to a press wheel (1) comprising an outer, circular tyre element (3), for an agricultural sowing machine (2), wherein ribs (6) enclosed by an elastic filler material (7) ensure improved radial and lateral guidance and suspension for said press wheel.