Cutting Mechanism with Leaf Spring Assembly for Ground Adaptation
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Solution Overview
Problem
Existing cutting mechanisms struggle to adapt to uneven ground conditions, particularly when crops are close to the ground, leading to inefficiencies and potential damage, and lack the ability to maintain cutting elements close to the ground without uncontrolled swinging.
Innovation Solution
A cutting mechanism using a leaf spring assembly composed of multiple spring leaves, where some leaves are connected to the cutting elements and others to the frame, with dampening and friction mechanisms to control movement, and tension rods to limit compression and rebound movements, ensuring precise ground adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid frame with fixed cutter bar is used, then structural stability is improved, but adaptability to ground contours deteriorates
Solution Approach 1:
The rigid cutter bar is divided into multiple rocker arms that can independently pivot relative to the frame. Each rocker arm segment can adapt to local ground variations while the overall structure maintains stability through the frame connection.
Solution Approach 2:
The cutter bar transitions from a fixed rigid structure to a dynamic system with rocker arms that can pivot and adjust their position. This allows the cutting elements to follow ground contours while maintaining structural integrity through controlled movement.
2Adaptability or versatility
If rocker arms are fastened in a rotary joint at the rear frame, then adaptability to ground contours is improved, but control over cutting element position deteriorates
Solution Approach 1:
The leaf spring assembly provides continuous feedback through its elastic deformation, automatically adjusting the rocker arm position based on ground conditions. The spring's mechanical properties create a self-regulating system that maintains optimal cutting element position without complex control mechanisms.
Solution Approach 2:
The leaf spring assembly changes the mechanical parameters of the rocker arm support, transitioning from a rigid fixed position to a compliant position that can elastically deform. This allows the cutting elements to maintain close ground contact while the spring's stiffness characteristics provide controlled resistance to movement.
3Ease of operation
If a single leaf spring is used as rocker arm, then freedom of movement is improved, but guidance strength on ground deteriorates
Solution Approach 1:
Multiple spring leaves are combined into a single leaf spring assembly that functions as one integrated rocker arm support. The individual leaves work together to provide both the necessary freedom of movement and collective guidance strength, merging the advantages of flexibility with sufficient control force.
Solution Approach 2:
The leaf spring assembly uses a composite structure of multiple spring leaves with different properties. The combination of multiple leaves creates a composite mechanical system that provides both flexibility for movement and sufficient stiffness for ground guidance, effectively combining contradictory properties in a single assembly.
4Adaptability or versatility
If all spring leaves are connected to cutting elements, then ground adaptation is improved, but control over swinging motion deteriorates
Solution Approach 1:
Different spring leaves have different connection configurations - some leaves are connected to cutting elements while others are not. This local differentiation allows certain leaves to provide ground adaptation through movement while other leaves remain connected to provide stabilizing influence and control over excessive swinging motions.
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 allows for quick and controlled adaptation to ground contours, minimizing swinging and maintaining cutting elements close to the ground, reducing crop loss and damage, while enhancing the response speed and flexibility of the cutting mechanism.
Implementation Method 1
a plurality of or all rocker arms are each embodied as a leaf spring assembly assembled of one or a plurality of spring leaves
Implementation Method 2
Due to friction that occurs at the facing surfaces of the spring leaves during spring movements, the spring movements are additionally dampened
Implementation Method 3
the spring movements are additionally dampened, in particular such spring movements in which the spring leaves swing downwardly
Data Source
AI summary
The invention relates to a cutting mechanism (4) for installing on a harvesting machine (2). The aim of the invention is to provide a cutting mechanism which comprises a mounting for the cutting elements and which adapts easily to the soil contour without thereby tilting into an uncontrolled swing. This is achieved in that multiple or all of the rocker arms (16) are designed as a respective leaf spring assembly (20) composed of multiple leaf springs (22), multiple or all of the leaf springs (22) lying flatly one on top of the other as a leaf spring assembly (20) are held together on the frame (6) between clamping elements (24) at the frame-side leaf spring ends, and only one or multiple leaf springs (22) arranged in the upper region of the leaf spring assembly (20) are connected to the cutting elements (18). One or more of the leaf springs (22) which are held on the frame (6) between the clamping elements (24) and are arranged in the lower region of the leave spring assembly (20) terminate, when viewed in the working direction, in front of the connection zone (26) of the leave springs (22) which are arranged in the upper region of the leaf spring assembly (20) and comprise the cutting elements (18).