Mowing Machine Skid Dirt Guide Element
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Solution Overview
Problem
Existing mowing machines with cutter bars experience poor cutting quality and increased wear due to dirt accumulation between skids, leading to rapid skid degradation and complex replacement processes.
Innovation Solution
Incorporating a dirt-guiding element on the skid that directs dirt to the central contact area, preventing lateral displacement and accumulation, and using a sloping or curved skid contour to buffer small unevenness, with optional dirt channels and guide elements to protect fastening units from abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mowing machine slides on the field with skids, then the skids protect the mowing devices from damage, but dirt accumulates in the intermediate area between skids causing poor cutting quality and increased wear
Solution Approach 1:
The skid is divided into functional zones: a bearing area that contacts the field and a protected intermediate area between skids. The bearing area is specifically designed to bear the harmful effect of dirt sliding, while the intermediate area is protected from dirt accumulation through the V-shaped contour design.
Solution Approach 2:
The skid features a V-shaped cross-sectional contour with a rounded bearing area at the front. This curved geometry naturally guides dirt away from the intermediate area between skids and directs it toward the bearing area, preventing accumulation that would otherwise harm cutting quality.
2Stability of the object's composition
If the skid rests on the field during mowing, then it provides stability and protection, but dirt is displaced to lateral edge areas and accumulates between skids
Solution Approach 1:
The V-shaped cross-sectional contour with rounded front edge creates a self-cleaning effect. As the skid moves forward, this curved geometry naturally directs dirt away from lateral edge areas and toward the central bearing area, preventing the harmful displacement of dirt to edge zones where it would accumulate between skids.
3Ease of repair
If fastening elements are used to attach skids, then the skids can be replaced when worn, but dirt causes greater wear and tear on the mounting bore and fastening elements
Solution Approach 1:
The skid design segments the contact zones: the bearing area at the front bears the full force of sliding and dirt impact, while the fastening elements located in the protected intermediate area are shielded from direct dirt contact. This spatial separation protects the fastening elements from accelerated wear while maintaining replaceability.
Solution Approach 2:
The bearing area acts as an intermediary that absorbs the harmful effects of dirt and field contact. By positioning this sacrificial bearing area between the dirt source and the fastening elements, the design protects the critical fastening components from direct exposure to abrasive dirt while maintaining the ability to replace skids when needed.
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
Prevents dirt accumulation between skids, improves cutting quality, reduces wear on skids and fastening elements, and simplifies maintenance by directing dirt under the skid, thus extending the service life of the skid and reducing maintenance complexity.
Implementation Method 1
the skid has at least one dirt guiding element for guiding dirt. Advantageously, the debris is directed to a bearing area of the skid, i.e. to an area which rests on or touches the field during mowing operation
Implementation Method 2
the skid has at least partially a sloping or curved contour in cross section and/or viewed along the direction of travel, so that the front edge of the skid is arranged close to the mower blade and a rear contact area of the skid rests on the field or the ground or glides
Data Source
Figure 1
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AI summary
The machine has a cutter bar (7) comprising two mowing devices (5) for mowing stalked crop in a field. The mowing devices comprise blades (8) rotating on a rotational axis. A skin plate i.e. protective wall, is arranged at the cutter bar in a vertical direction below the mowing devices for sliding on the field. The skin plate has a dirt guide element for conducting dust. The dirt guide element comprises a longitudinal axis and/or a longitudinal extension that is arranged with respect to a travel direction (F) of the mowing devices at an acute angle.