Quick Fit Blade Attachment for Agricultural Soil Tilling Machines
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Solution Overview
Problem
Agricultural soil tilling machines face challenges with blade wear and frequent replacement due to harsh conditions, leading to complex and time-consuming blade replacement procedures, often requiring machines to be taken to a workshop, resulting in prolonged stopping periods and additional economic expenses.
Innovation Solution
A quick fit system for blades using a bayonet lock or neodymium magnet retention mechanism that allows for easy and in-situ blade replacement, reducing the need for high torque screws and minimizing the impact of humidity and dirt, enabling operators to change blades directly on the farm with minimal interruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to secure blades, then the blades can be firmly fixed during soil tilling, but the blade replacement becomes complicated and time-consuming due to jamming and head wear
Solution Approach 1:
The attachment means is divided into a fixed part and a movable part that can rotate relative to each other. The blade is secured by the fixed part while the movable part provides a quick-release mechanism through rotation, separating the functions of secure fixation and easy removal into distinct structural components.
Solution Approach 2:
The attachment means transitions from a static screw connection to a dynamic system where the movable part can rotate between locked and unlocked positions. This rotational movement allows the operator to quickly release the blade by simply rotating the movable part, eliminating the need for tools to unscrew jammed screws.
2Reliability
If high tightening torque is applied to prevent screw loosening, then the blade remains secure during operation, but special tools are required for blade replacement that are not available in the field
Solution Approach 1:
The movable part is designed to be manually operable by the operator without requiring external tools. The rotation mechanism allows the operator to directly engage or disengage the blade by hand, making the system self-sufficient for blade replacement operations in the field without needing specialized workshops or toolkits.
3Reliability
If conventional screw systems are used, then blades can be securely fastened, but the damp and dusty environment causes screw heads to wear and jam
Solution Approach 1:
Instead of using threads that can accumulate dirt and moisture in their crevices, the invention uses a smooth rotational interface between the fixed and movable parts. The rotation mechanism lacks the threaded structures that trap contaminants, making it resistant to the damp and dusty environmental conditions that cause conventional screws to jam.
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
Facilitates rapid and reliable blade replacement with reduced force requirements and increased robustness, allowing for continuous soil tilling operations without the need for workshop visits, thereby reducing downtime and economic burdens.
Implementation Method 1
the retention means is a neodymium magnet
Data Source
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AI summary
Quick fit system for fitting a blade (2) to the attachment support (4) of an agricultural soil tilling machine. The blade (2) has an attachment end (8) inserted into a housing (10) of the support (4) and secured by means of a positive fit connection by attachment means (12). The attachment means (12) comprises a fixed part (14) provided with a first supporting end stop (20), a movable part (16) provided with a second supporting end stop (22). The fixed and movable parts (14, 16) are mutually lockable with respect to one another by retention means (18) via a relative rotation of less than 360º starting from a release position in which blade (2) can be dismantled, to a locking position in which said blade (2) remains secured in service position. The invention also relates to an agricultural machine that comprises the quick fit system.