Mulching Blade Segmented Cutting Planes
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Solution Overview
Problem
Conventional mulching blades exhibit unsatisfactory cutting performance, particularly with longer mowing materials, as they fail to effectively cut and shred vegetation efficiently.
Innovation Solution
The mulching blade features two separate, leaf-shaped knife blades at its wing end, forming distinct cutting planes oriented differently relative to the axis of rotation, allowing for cutting at various angles to enhance the probability of cutting through crop elements like stalks and branches, with one plane aligned radially and the other parallel to the axis, and adjustable via screw or rivet connections for adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional single-blade wings are used, then the device complexity is low, but the mowing performance deteriorates with longer vegetation
Solution Approach 1:
The blade wing is divided into multiple separate blade sections (first blade section, second blade section, third blade section) instead of using a single conventional blade. Each section has its own cutting edge oriented at different angles, allowing simultaneous cutting of vegetation at multiple orientations, thereby improving mowing performance while maintaining manageable structural complexity through modular segmentation.
Solution Approach 2:
The invention introduces multiple cutting edges oriented in different spatial dimensions and angles relative to the rotation axis. The first cutting edge is oriented at a first angle, the second cutting edge at a second angle, and the third cutting edge at a third angle, creating a multi-dimensional cutting approach that effectively handles vegetation of various orientations and lengths, thus improving productivity.
2Productivity
If multiple cutting edges at different angles are added, then the cutting effectiveness improves, but the manufacturing complexity increases
Solution Approach 1:
The blade is manufactured as separate blade sections that can be individually produced and then assembled together. This segmentation allows each section to be optimized and manufactured independently using standard processes, reducing overall manufacturing complexity despite the presence of multiple cutting edges at different angles.
Solution Approach 2:
Multiple blade sections with different cutting edge orientations are combined into a single integrated blade wing assembly. This merging allows the complex multi-angle cutting functionality to be achieved while maintaining ease of manufacture through modular assembly of standardized components rather than creating a single complex monolithic blade.
3Adaptability or versatility
If fixed blade orientation is used, then the device simplicity is maintained, but the adaptability to different vegetation types decreases
Solution Approach 1:
The blade is segmented into multiple independently oriented blade sections, each with its own cutting edge at a specific angle. This segmentation provides inherent adaptability to different vegetation types and orientations without requiring complex adjustable mechanisms, as the multiple fixed orientations collectively cover a range of cutting angles suitable for various plant configurations.
Solution Approach 2:
The multi-section blade design provides universal cutting capability for different vegetation types, orientations, and lengths. The first, second, and third cutting edges at different angles can handle upright vegetation, horizontal vegetation, and vegetation at various intermediate angles, making the blade universally effective across diverse mowing conditions without adding complex adjustment mechanisms.
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to a mulching blade (10) for a mowing device (22), with a hub (16) rotatable about an axis of rotation and at least one blade wing (26) projecting radially from the hub (16), which has a wing end region (30) facing away from the hub (16), wherein the at least one blade wing (26) has two blades (32, 34) projecting from its wing end region, which form a first cutting plane (36) and a second cutting plane (38), wherein the two cutting planes are oriented differently from each other with respect to the axis of rotation (20).