Disc Mower Knife Mounting with Spring Plate Stop Against Binding
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Solution Overview
Problem
Existing knife mounting assemblies in agricultural mowers are prone to issues where knives bind due to contact with spring plates, leading to reduced functionality and increased risk of knife damage when striking obstacles.
Innovation Solution
A spring plate with a recess that holds a portion of the knife nut, where the nut's bottom acts as a stop to prevent the spring plate from contacting the knife, allowing free rotation and quick knife changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring plate is used to hold the knife nut in known mounting assemblies, then the knife can be quickly changed, but the spring plate contacts the knife and causes binding when the knife rotates to protect from obstacles
Solution Approach 1:
The harmful contact function between the spring plate and knife is extracted by introducing an intermediate element (the knife nut with recess). The spring plate no longer directly contacts the knife, eliminating the binding problem while maintaining the quick-change capability through the recess mechanism.
Solution Approach 2:
The knife nut acts as an intermediary element between the spring plate and the knife. The recess in the knife nut receives the spring plate, preventing direct contact between the spring plate and knife, thus allowing the knife to rotate freely without binding while still maintaining secure mounting.
2Stability of the object's composition
If the spring plate contacts the knife to secure it, then the knife is held firmly in position, but the knife cannot freely rotate when striking obstacles
Solution Approach 1:
The knife nut with recess serves as a mediator that decouples the stabilizing function from the rotation function. The recess provides a controlled interface that allows the spring plate to hold the knife nut firmly while permitting the knife to rotate freely on the knife nut, thus resolving the conflict between stability and adaptability.
3Device complexity
If the spring plate moves freely towards the mounting bar, then the mounting structure is simple, but the spring plate contacts the knife causing binding and potential damage
Solution Approach 1:
The harmful contact between spring plate and knife is extracted by introducing the recess in the knife nut. This allows the spring plate to maintain its simple, free-moving design toward the mounting bar while the recess intercepts the spring plate before it can contact the knife, eliminating the binding and damage risk without adding significant complexity.
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
Prevents knife binding and maintains quick and convenient mounting, ensuring knives can freely rotate and return to cutting position without damage.
Implementation Method 1
a spring plate biased towards the mounting bar
Data Source
AI summary
A disc cutter for an agricultural implement includes: a mounting bar including a bar opening; a bolt disposed in the bar opening; a knife nut including a nut opening in which the bolt is disposed; a knife including a knife opening in which the knife nut is disposed, the knife being configured to rotate about a rotation axis defined by the knife nut; and a spring plate biased towards the mounting bar and having a recess formed therein. The knife nut has a portion held in the recess and a bottom of the portion acts as a stop against movement of the spring plate towards the mounting bar.