Rod Weeder Quick-Change Assembly and Hydraulic Depth Control
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Solution Overview
Problem
Current rod weeders face issues with inconsistent depth due to varying ground levels, non-adjustable down-pressure, difficulty in replacing rods, and debris entrapment, which reduces effectiveness and operational efficiency.
Innovation Solution
A rod weeder with a quick-change rod assembly and hydraulic system for adjustable down-pressure, along with disc openers to prevent debris entrapment, allowing for easy rod replacement and ground-level following.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rod weeder uses a fixed rod depth design, then the structure is simple, but the rod depth varies on uneven ground reducing effectiveness
Solution Approach 1:
The rod depth is made dynamically adjustable through a telescopic rod design with multiple extendable sections. Each section can be independently extended or retracted to maintain consistent rod tip depth across uneven terrain, transforming a static structure into a dynamic one that adapts to ground variations.
Solution Approach 2:
The rod is divided into multiple telescopic sections that can be independently adjusted. This segmentation allows each portion of the rod to be positioned at the optimal depth for its specific location, ensuring uniform weed control effectiveness across the entire working width despite ground irregularities.
2Reliability
If the rod weeder has non-adjustable down-pressure, then the structure is simple, but the rod placement depth is inconsistent in different soil types
Solution Approach 1:
The down-pressure parameter is made adjustable through a spring-loaded mechanism with varying spring rates. Different soil conditions (light vs. heavy soil) require different pressure levels, and the system allows selection of appropriate spring rates to optimize rod placement depth for each soil type, transforming a fixed-parameter system into a variable-parameter one.
3Ease of repair
If the rod weeder uses a fixed rod design, then the structure is simple, but rod replacement is difficult and requires workshop conditions
Solution Approach 1:
The rod is designed as a modular telescopic structure with standardized connection interfaces between sections and between the rod assembly and support beam. This segmentation with standardized connectors enables rapid field replacement of individual rod sections or the entire rod assembly without requiring workshop conditions or specialized tools.
Solution Approach 2:
The rod replacement process is transformed from a static, time-consuming operation to a dynamic, rapid-change operation. The quick-change mechanism with release latches and telescopic sections allows the rod to be quickly detached and replaced in the field, minimizing downtime and enabling maintenance to be performed during normal operations rather than requiring workshop visits.
4Object-affected harmful factors
If the rod weeder has fixed gauge wheel and rod shank positions, then the structure is simple, but plant debris gets caught between components
Solution Approach 1:
The gauge wheel and rod shank positions are made dynamically adjustable rather than fixed. The support beam can be tilted and positioned at different angles and heights, allowing the operator to create sufficient clearance between the gauge wheels and rod shanks to prevent plant debris from becoming entrapped, thereby eliminating a source of operational problems.
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
Enables efficient weed control by ensuring consistent rod depth, adjustable pressure, and easy maintenance, preventing debris entrapment and improving operation on uneven terrain.
Implementation Method 1
A hydraulic cylinder moves the rod weeder between a raised position and an operating position and for providing down-pressure during operation
Implementation Method 2
The rod is driven by a suitable drive mechanism such that it rotates about a longitudinal axis thereof at a rate of approximately 100 to 150 rpm
Data Source
AI summary
A rod weeder wherein the rotatable rod is provided as a quick-change rod assembly comprising the rod and rod shoes for being mounted to the rod shanks resulting in the ability to quickly release and change the quick-change rod assembly from the tool frame and the remainder of the implement. Optionally, the rod weeder may comprise disk openers placed in proximity to the gauge wheels, or the support beam may be pivotally movable mounted to the connecting structure such that the same is enabled to oscillate about an axis through a centre pivot and oriented parallel to a forward moving direction of the rod weeder.