Concave-Convex Road Marking Cutter for Noise and Stability
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Solution Overview
Problem
Existing road markings produce noise and vibrations that can be disturbing, and pose a risk to two-wheeler stability due to sharp transitions and water accumulation in depressions, leading to potentially dangerous steering corrections and unstable driving situations.
Innovation Solution
A cutting body with a concave cutting area adjacent to a convex cutting area, allowing for smooth transitions and reduced water accumulation, and featuring interchangeable cutting elements to create continuous, sinusoidal-like road markings that minimize noise and lateral instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a convex cutting curve is used to create road markings, then the road marking function is achieved, but noise and vibrations are produced that disturb the environment
Solution Approach 1:
The cutting body uses a concave cutting curve instead of a convex one, creating a different geometric profile for the road marking indentations. This curvature change modifies how the tire interacts with the marking, reducing the impact shock and resulting noise while maintaining the acoustic warning function
2Manufacturing precision
If sharp-edged transitions are created between road surface and road marking, then the road marking is clearly defined, but two-wheeler stability is compromised
Solution Approach 1:
The concave cutting curve creates rounded, smooth transitions instead of sharp edges. The indentation profile features a concave bottom with smooth curved walls, allowing two-wheeler tires to roll over gradually without sudden lateral forces that would cause instability or steering corrections
3Shape
If deep depressions are milled into the road surface, then the road marking is prominent, but water accumulation increases
Solution Approach 1:
The concave cutting curve creates a specific indentation geometry with a concave bottom that prevents water pooling. The curved profile allows water to drain more effectively compared to deep sharp-edged depressions, reducing water accumulation while maintaining visible road markings
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 reduces noise and haptic disturbance, improves two-wheeler stability by gentle tire entry into depressions, and decreases water accumulation, providing a safer and less annoying driving experience.
Implementation Method 1
When a vehicle tire rolls over, noises and vibrations are produced
Implementation Method 2
The chisels cut out an indentation in the roadway
Implementation Method 3
The cutting bodies grind into the road surface
Implementation Method 4
The cutting bodies are set in rotation while the tool is being used and placed on the road surface to be machined. The rotational movement is overlaid with a linear movement
Data Source
Figure 1
Figure 2~4
Figure 5a~7c
AI summary
The unit has a drum shaped rotary unit (10) rotatable about a rotation axis, where the rotary unit receives cutting elements defining a cutting curve (15). The cutting curve forms a convex cutting region (15.2) in direction of the rotation axis, where a respective concave cutting region (15.1) is indirectly or directly adjacent to the convex cutting region on both sides. A mounting surface comprises a convex mounting portion (14.2) associated with the convex cutting region and a concave mounting portion (14.1) associated with the concave cutting region. Independent claims are also included for the following: (1) a road marking comprising longitudinal walls transversely to longitudinal direction of the road (2) a rumble strip cutting apparatus comprising a rotary unit rotatable about a rotational axis (3) a method for cutting a rumble strip in a road surface.