Mower Working Drum with Helicoidal Blades for Material Flow
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Solution Overview
Problem
Existing working drums in mowing machines suffer from plant wrapping, low material flow, excessive accumulation of cut mass, and high impurity levels, leading to irregular overloads, reduced performance, and lower quality of cut material.
Innovation Solution
A working drum with a cylindrical or conical sidewall and detachable cover, featuring helicoidal limiting and lifting blades that direct cut plants clockwise during rotation, preventing wrapping and enhancing material flow, and equipped with ejecting elements to ensure efficient ejection and reduced impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional working drums with simple cylindrical or conical sidewalls are used, then the structure is simple and easy to manufacture, but cut plants wrap around the drum and material flow is insufficient
Solution Approach 1:
The drum sidewall is segmented into multiple functional zones: lower lifting blades (counter-clockwise orientation), upper ejecting elements, and limiting blades (helicoidal orientation). This segmentation allows each zone to perform a specific function in the material flow process, improving overall productivity while maintaining manufacturing simplicity through modular blade attachment.
Solution Approach 2:
The drum employs dynamically oriented blades with specific rotational directions (counter-clockwise for lifting, helicoidal for limiting, and ejecting elements for discharge) that work in sequence during drum rotation. This dynamic arrangement optimizes material flow at different stages of the rotation cycle, enhancing productivity without complicating the basic drum structure.
2Device complexity
If traditional working drums without limiting elements are used, then the structure is simple, but cut plants wrap around the drum and accumulate excessively
Solution Approach 1:
Limiting blades are positioned at the upper section of the drum to preemptively prevent cut plants from wrapping around the drum perimeter. These blades create a physical barrier that guides material flow before wrapping can occur, reducing overload risk on the drum structure and improving reliability without significantly increasing device complexity.
Solution Approach 2:
The limiting blades convert the potentially harmful wrapping action into a beneficial guiding function. By orienting these blades helicoidally, they utilize the natural tendency of material to wrap around the drum and redirect it into a controlled flow pattern that enhances material ejection while preventing excessive accumulation and overload.
3Ease of manufacture
If traditional working drums with basic sidewall shapes are used, then manufacturing is simple, but impurity levels in cut material are high and drying is slow
Solution Approach 1:
The drum sidewall incorporates locally differentiated functional elements: lifting blades at the lower section with counter-clockwise orientation, ejecting elements at the upper section, and limiting blades with helicoidal orientation. Each local zone is designed with specific blade characteristics optimized for its function, improving cut material quality and drying efficiency while maintaining simple overall drum fabrication.
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 solution improves material flow, reduces overloading, and enhances cut quality, leading to increased machine efficiency and purity, as well as faster drying of crops by effectively lifting and directing cut plants away from the cutting bar.
Implementation Method 1
The drum rotates around own axis and transports not only cut plants but also undesired impurities... lifting blades that direct cut plants clockwise during rotation
Implementation Method 2
ejecting elements to ensure efficient ejection and reduced impurities... ejecting clockwise towards the drum rotation
Data Source
Figure 1~2
Figure 3~4
AI summary
A mower working drum located on a cutting bar is mounted detachably to a hub and is provided at the bottom with cutting knives in a cutting disc, and above the disc is provided axially a drum sidewall (8). On the drum wall are provided ejecting elements. From the top, the drum has a cover (12) provided detachably. Under the cover and between the ejecting elements (10) mounted on the drum are limiting blades (11), and in the bottom section of the drum, in a counter-clockwise direction to the limiting blades mounted are lifting blades (9).