Harvester Header Cutter Bar Flotation Mechanism
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Solution Overview
Problem
Existing harvester headers face inefficiencies in cutter bar flotation due to inadequate damping mechanisms, leading to ineffective stress discharge and high maintenance requirements.
Innovation Solution
The improved harvester header features an adjustable first connector with a hinge allowing controlled rotation and a second connector with a telescopic actuator that supports the cutter bar arm, enabling efficient floating and reduced maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damping mechanism with actuator is used to control cutter bar rotation, then the cutter bar flotation is controlled, but the mechanism becomes complex and requires continuous maintenance
Solution Approach 1:
The patent removes the complex oleo-dynamic damping actuator from the system entirely. Instead of using an active damping mechanism, the invention uses a passive triangular hinged mechanism with support arms that naturally provide flotation control through their geometric configuration and hinge connections, eliminating the need for continuous maintenance of damping components.
Solution Approach 2:
The triangular hinged mechanism with support arms provides self-regulating flotation control. The hinges and support arms automatically adjust to ground conditions and crop resistance without requiring external actuators or damping mechanisms, making the system self-sufficient and maintenance-free.
2Reliability
If a triangular hinged mechanism with lifting piston is used to balance roughness, then the cutter bar flotation is improved, but the mechanism complexity increases and maintenance becomes critical
Solution Approach 1:
The patent simplifies the triangular hinged mechanism by removing the lifting piston component. The support arms with hinge connections alone provide sufficient flotation control by allowing passive rotation and adjustment, eliminating the complexity and maintenance requirements of piston-based lifting mechanisms.
Solution Approach 2:
Instead of using an active lifting piston to force the cutter bar into position, the invention uses passive hinges that allow the support arms to naturally rotate and adjust to ground conditions. This inverts the approach from active control to passive adaptation, reducing complexity while maintaining effectiveness.
3Productivity
If the cutter bar is constrained to float above the ground, then cutting efficiency is improved, but the structure requires high stiffness and complex constraints
Solution Approach 1:
The patent uses dynamic hinge connections that allow the cutter bar to passively follow ground contours and crop resistance variations. The hinges provide rotational freedom while maintaining cutting contact, eliminating the need for high-stiffness rigid constraints and complex floating control mechanisms.
Solution Approach 2:
The invention changes the constraint parameter from rigid high-stiffness connections to flexible hinge-based rotational constraints. This parameter change allows the cutter bar to adapt to varying ground conditions while maintaining cutting efficiency, without requiring complex high-stiffness structural constraints.
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
This design allows for controlled and effective floating of the cutter bar, reducing maintenance needs and operational costs while maintaining cutting efficiency.
Implementation Method 1
a second connector (3), constrained between said arm (10) and said frame (11), comprising at least a second component (30) capable of varying its extension
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
It is provided a combine harvester header (1), comprising an arm (10) to which at least one cutter bar (10a) and a frame (11) are associated to support the arm (10) on a ground comprising a plurality of crops to be cut, a first connector (2) including a first component (20) constrained between the frame (11) and the arm (10) and defining at least a first axis of rotation (2a) parallel to the ground around which the arm (10) can rotate with respect to the frame (11), a second connector (3) including a second component (30) with variable extension constrained between the frame (11) and the arm (10), in which the second connector (3) is arranged at the above said first connector (2) with respect to the ground so as to support the arm (10) in traction with respect to the frame (11).