Adjustable Seed Drill Coulter Trailing End
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing seed coulters are not adaptable to different soil conditions and metering devices, leading to handling complexity in production and spare parts management, as well as suboptimal seed deposition in the furrow, especially in wet conditions where clogging occurs or air flow entrains seeds.
Innovation Solution
A coulter with an adjustable closure device for the trailing end portion of the discharge opening, allowing variable coverage from 0% to 100%, enabling the same coulter to be used for both pneumatic and mechanical metering devices, and adaptable to soil moisture and seed type, ensuring proper seed placement and germination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed trailing end portion is used in the discharge opening, then the coulter can be optimized for either pneumatic or mechanical metering devices, but it cannot be adapted to different soil conditions and seed types
Solution Approach 1:
The trailing end portion of the discharge opening is made movable instead of fixed. It can be adjusted between different positions to change the effective discharge area, allowing the same coulter to adapt to different operating conditions such as pneumatic versus mechanical metering devices and different soil moisture conditions.
Solution Approach 2:
The discharge characteristics of the coulter are modified by changing the effective area of the trailing end portion. By adjusting the position of the trailing end portion, the discharge parameters (area, shape) can be optimized for different seed types, soil conditions, and metering device configurations.
2Object-affected harmful factors
If a large trailing end portion is used, then air flow can escape without entraining seeds, but seeds may exit through the trailing end portion and not be placed correctly in the base of the furrow
Solution Approach 1:
The trailing end portion position is dynamically adjustable based on the type of metering device and soil conditions. For pneumatic metering devices, the trailing end portion can be positioned to allow air escape while preventing seed exit. For mechanical metering devices, it can be positioned to ensure precise seed placement in the furrow base.
Solution Approach 2:
Different sections of the discharge opening can have different functions optimized for different purposes. The trailing end portion can be designed to control air flow while the bottom portion ensures seed placement, with the ability to adjust the contribution of each section based on operating conditions.
3Manufacturing precision
If a small trailing end portion is used, then seeds are placed correctly in the base of the furrow, but the bottom portion may clog in wet soil conditions
Solution Approach 1:
The trailing end portion can be adjusted to a more open position when operating in wet soil conditions or with pneumatic metering devices. This provides an alternative discharge path that prevents clogging of the bottom portion while maintaining reliable seed discharge.
Solution Approach 2:
The discharge opening is designed to serve multiple functions through the adjustable trailing end portion. It can function as a primary seed discharge path, an air escape path, or a backup discharge path depending on the position of the trailing end portion, making the coulter universally applicable to different operating conditions.
4Object-affected harmful factors
If multiple different coulters are manufactured for different metering devices and soil conditions, then optimal performance is achieved for each condition, but handling complexity in production and spare parts management increases
Solution Approach 1:
A single coulter design incorporates an adjustable trailing end portion that can be configured for different operating conditions. This universal design eliminates the need to manufacture and manage multiple different coulter types for pneumatic versus mechanical metering devices and different soil conditions, simplifying production and spare parts inventory.
Solution Approach 2:
The discharge opening is segmented into the bottom portion and the trailing end portion, with the trailing end portion being independently adjustable. This segmentation allows the same coulter body to be adapted for different functions by repositioning the trailing end portion, rather than requiring completely different coulter designs.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Coulter (10) for a seed drill comprising: an elongate pipe (11) having an inlet opening (12) at one end for introducing seeds or fertilizer into the pipe (11) and a discharge opening (13) at the opposite end, the discharge opening (13) comprising a bottom portion (14) and a trailing end portion (15), the trailing end portion (15) extending from the bottom portion (14) in the longitudinal direction of the pipe (11), and an adjustable closure device (20) configured to adjustably cover a proportion of the area of the trailing end portion (15) of the discharge opening (13).