Cutter Blade Intersection Part for Grass Transport
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Solution Overview
Problem
Existing rotary lawn mowers struggle to efficiently transport long or wet heavy grass clippings, leading to poor lawn quality and potential rotting due to dropped grass not being effectively caught by the transportation wind.
Innovation Solution
A cutter blade design with a radial blade proximal part, a clipping part, a falling part curved downward, and a warping part that rises in the reverse rotation direction, featuring an intersection part where the falling and warping parts intersect, creating a cup-shaped portion to catch and transport clipped grass efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cutter blade uses a conventional design without an intersection part between falling and warping parts, then the structure is simpler, but long and wet heavy lawn grass cannot be efficiently caught and transported on transportation wind
Solution Approach 1:
The patent merges the falling part and warping part to form an intersection part, combining two functional elements into a unified structure. This intersection part creates a cup-shaped recess that effectively catches and transports long and wet heavy lawn grass on the transportation wind, resolving the contradiction between transportation efficiency and structural simplicity.
Solution Approach 2:
The intersection part introduces a three-dimensional cup-shaped recess structure that adds vertical dimension to the blade design. This dimensional change creates a catching area that accommodates long and wet heavy lawn grass, improving transportation efficiency without significantly increasing overall structural complexity.
2Reliability
If the falling part and warping part do not intersect, then the blade structure is simpler, but lawn grass is dropped directly onto the ground causing poor lawn quality and potential rotting
Solution Approach 1:
By merging the falling part and warping part into an intersection part, the patent creates a unified cup-shaped structure that reliably catches and transports lawn grass. This prevents grass from being dropped directly onto the ground, ensuring consistent lawn quality and preventing rotting while maintaining acceptable structural complexity.
3Object-affected harmful factors
If the intersection part has a flat surface, then manufacturing is easier, but air resistance and wind noises increase during blade rotation
Solution Approach 1:
The patent applies curvature to the intersection part by forming a cup-shaped recess with rounded surfaces. This curved geometry reduces air resistance and wind noises during blade rotation compared to flat surfaces. The curvature is integrated into the forming process, maintaining ease of manufacture while effectively reducing harmful aerodynamic factors.
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 design allows for effective catching and transportation of long or wet heavy grass clippings on the transportation wind, improving lawn quality by reducing air resistance and noise, and enhancing the generation of transportation wind for efficient clipping and collection.
Implementation Method 1
it becomes possible to transport the clipped lawn grass efficiently on transportation wind
Implementation Method 2
the cup shaped portion may be recessed toward a lower surface of the cutter blade
Data Source
AI summary
A cutter blade for a mower includes a blade base part, a cutting part positioned further outward radially than the blade base part, a descending part formed between the blade base part and the cutting part, and a curved part formed so as to curve upward from the cutting part. The descending part and the curved part have an intersection part at which an end of the descending part in the counter-rotating direction and a radially inner end of the curved part intersect.