Crop Lifter Bow-Shaped Locking Mechanism
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Solution Overview
Problem
Existing cutting units with grain lifters are complex to assemble and disassemble, requiring tools and multiple components, which complicates maintenance and replacement processes.
Innovation Solution
A cutting unit design featuring a flexible support rail with a bow-shaped locking mechanism made of spring steel, allowing for tool-free assembly and disassembly, and a fastening element that combines mounting and fixation functions, reducing the number of components and simplifying the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional grain lifter design with multiple components (locking pin, receiving guide, support rail) is used, then the grain lifter can be securely attached to the cutter bar, but the assembly and disassembly process becomes complex and requires tools
Solution Approach 1:
The locking means is integrated directly into the receiving guide as a single unit, eliminating the need for separate locking pins and multiple fastening components. The receiving guide itself forms the locking structure, reducing the total component count while maintaining secure attachment functionality.
Solution Approach 2:
The bow-shaped locking means utilizes the inherent elasticity of spring steel to automatically engage and disengage from the support rail without requiring external tools. The spring force provides automatic locking when components are assembled and automatic release when disassembled, making the process tool-free and simplified.
2Ease of operation
If a bow-shaped locking means made of spring steel is used, then tool-free assembly and disassembly is enabled, but the reliability of the locking connection must be ensured
Solution Approach 1:
The locking means is designed with specific geometric parameters (bow shape, thickness, curvature radius) that optimize the spring force characteristics. By carefully selecting these parameters, the locking mechanism achieves sufficient engagement force for reliable connection while maintaining the ability to be easily released when needed.
Solution Approach 2:
The locking means is made from spring steel, a composite material that combines high elastic strength with ductility. This material property allows the locking means to maintain a strong, reliable connection during operation while still being flexible enough to be manually engaged and disengaged without tools.
3Adaptability or versatility
If the support rail is made of spring steel to follow ground unevenness, then the grain lifter can adapt to terrain variations, but the overall structure becomes more complex
Solution Approach 1:
The support rail is constructed from spring steel, a flexible material that can bend and deform to follow ground unevenness while maintaining its structural integrity. This flexible design allows the grain lifter to adapt to terrain variations without requiring additional suspension components or complex mechanisms.
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
Enables quick and tool-free assembly and disassembly of the grain lifter, reducing the complexity and time required for maintenance and replacement, while ensuring secure hold and alignment with the mowing finger.
Implementation Method 1
a bow-shaped locking means (33) is arranged on the receiving guide (29), which is positively connected to the receiving guide (29) in the locked position and is loaded with a spring force, the spring force acting on the locking means (33) being able to be applied by it
Implementation Method 2
The properties of a bow-shaped locking means made of a spring-elastic material, in particular a spring steel, are used to apply a spring force which reliably holds the locking means in its locking position
Data Source
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AI summary
The present invention relates to a crop lifter (22) for a cutting unit, which has a cutter bar (5) with cutter fingers (7) projecting from it, comprising: - a flexible support rail (23) with a first end (24) for mounting on the cutter bar (5) and a second end (25), - a crop lifter (26) arranged at the second end (25) of the support rail (23), - a receiving guide (29, 50) arranged on the side of the support rail (23) facing the crop lifter (26), which sectionally encloses a cutter finger (7) in the position of the crop lifter (22) mounted on the cutter bar (5), wherein a U-shaped locking means (33) is arranged on the receiving guide (29, 50), which engages positively with the receiving guide (29, 50) in the locked position and is subjected to a spring force. is, wherein the spring force acting on the locking means (33) can be applied by it.