Segmented Snowplow Knife Adapting to Uneven Surfaces
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Solution Overview
Problem
Conventional snowplow blades are inefficient on non-flat road surfaces with concavities and convexities, as segments of the lower edge slide off raised areas, leaving compacted snow that poses security issues due to uneven cleaning.
Innovation Solution
A snowplow blade design featuring a modular scraping knife with elastically yielding mounting blocks and independent plates that adapt to surface geometry, allowing the knife to maintain contact and clear the surface uniformly by sliding and rotating with the surface profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a straight lower edge of the knife is used, then the blade structure is simple, but the cleaning uniformity deteriorates on non-flat surfaces
Solution Approach 1:
The knife is divided into multiple independent plate-like portions (first plate portion, second plate portion, third plate portion) that can move independently relative to each other and the rolling element. This segmentation allows each plate to adapt to local surface variations while maintaining overall structural simplicity.
Solution Approach 2:
The plate portions are designed to slide vertically relative to the rolling element and can rotate independently about axes perpendicular to their scraping edges. This dynamic capability enables the knife to conform to non-flat surfaces while maintaining a relatively simple mounting structure.
2Stability of the object's composition
If the knife plates are fixed rigidly, then the structure is stable, but the adaptability to surface variations deteriorates
Solution Approach 1:
The plate portions are mounted on elastically yielding blocks that allow vertical sliding and rotational movement. This dynamic mounting provides structural stability through controlled movement rather than rigid fixation, enabling adaptation to surface variations while maintaining overall structural integrity.
Solution Approach 2:
The mounting blocks are designed to be elastically yielding, allowing the plate portions to change their position and orientation parameters in response to surface variations. This enables the structure to adapt dynamically while maintaining stability through elastic deformation rather than rigid connection.
3Device complexity
If a single rigid knife is used, then the device complexity is low, but the cleaning accuracy on varied surfaces deteriorates
Solution Approach 1:
The knife is segmented into multiple independent plate portions that can move independently, improving cleaning accuracy on varied surfaces while keeping each individual plate simple in design. The segmentation distributes the complexity across multiple simple components rather than one complex rigid structure.
Solution Approach 2:
The plate portions automatically adjust their positions and orientations through sliding and rotating movements in response to surface variations, eliminating the need for complex control systems. The structure serves itself by using the surface variations to drive the adaptive movements.
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 ensures uniform clearing of road surfaces regardless of their flatness, effectively removing snow and ice by adjusting to the surface's curvature, thereby improving safety and efficiency.
Implementation Method 1
an upper rolling element (5) coupled to the mounting frame (4) and in rotating contact with the surface (2)
Implementation Method 2
The plate portions (12) are mounted on elastically yielding blocks (16) which allow the plate portions (12) to slide and rotate independently
Data Source
AI summary
In a snowplow blade (1), an upper elongated rolling element (S) is associated with a lower elongated knife (8) having a free sliding lower edge, in use, in contact with a surface (2) to be cleared; the knife (8) comprising a plurality of elongated plate portions (12) independent from one another and juxtaposed in a direction (13) transverse to the advancement direction of the blade; at least a guide and slide assembly of relative mobility being interposed between each elongated plate portion (12) and the rolling element (5) to allow at least a translation of the elongated plate portion (12) towards the rolling element (5) against the action of at least one removal elastic block (36) of the late portion (12) from the rolling element 5 itself.