Cutter bar form-fitting partial rail connection
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Solution Overview
Problem
Existing cutter bars with complex coupling devices face challenges in securely maintaining coaxial position under tensile forces during vertical deflection, which can lead to misalignment and impaired movement of the cutting system.
Innovation Solution
A form-fitting connection at the end faces of partial rails absorbs tensile forces, ensuring coaxial alignment and preventing bending or twisting, allowing for easy assembly and exchange of sub-rails, and enabling flexible length adjustment of the knife rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a complex coupling device is used to connect partial rails, then the coaxial position is maintained, but the device complexity increases significantly
Solution Approach 1:
The coupling device is segmented into a coupling element with a receiving opening and a coupling arm with a projection. This segmentation allows each component to have a simple, focused function while working together to maintain coaxial position, reducing overall device complexity compared to a monolithic complex coupling mechanism.
Solution Approach 2:
The invention extracts the essential function of maintaining coaxial position from a complex coupling device and implements it through a simplified geometric relationship between the coupling arm's projection and the receiving opening's contour. This extraction eliminates unnecessary components while preserving the core functionality.
2Strength
If a locking mechanism with locking bolt and locking sleeve is used, then the connection is secure, but the structural complexity and additional operating means are required
Solution Approach 1:
The coupling connection is designed to be self-aligning and self-securing. The contour of the receiving opening and the projection's geometry automatically guide the coupling arm into the correct position and maintain it there, eliminating the need for separate locking bolts, sleeves, or operating mechanisms while ensuring secure connection.
Solution Approach 2:
The functions of alignment, connection, and locking are merged into a single geometric relationship between the coupling elements. The contour-matched geometry simultaneously provides alignment guidance and secure connection without requiring separate locking components.
3Stability of the object's composition
If the knife rail is made as a single long piece, then the structural integrity is maintained, but the handling and shipping becomes difficult
Solution Approach 1:
The knife rail is segmented into multiple partial rails that can be separately handled and shipped. The coupling device enables these segments to be easily connected on-site, combining the handling advantages of small components with the structural integrity of a long continuous rail when assembled.
Data Source
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AI summary
The present invention relates to a cutter bar (1) for a cutting unit comprising a cutter bar (8) comprising at least two partial rails (9, 10) which can be connected to each other at their end faces, and to a cutting system (2) which can be attached to the cutter bar (8) and which can be moved oscillatingly back and forth and which can be deflected transversely to its longitudinal axis in a vertical direction, characterized in that the partial rails (9, 10) can be connected to each other in a form-fitting manner at their mutually facing end faces.