Variable Length Protective Cover With Convex Scraping Edge
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Solution Overview
Problem
Existing protective covers with uniformly wide, angled wiping edges fail to maintain close contact with varying surface contours, allowing chip penetration due to material elasticity and stiffening effects, leading to inadequate protection against foreign bodies during workpiece processing.
Innovation Solution
A length-variable protective cover with a convex scraping edge profile, where the edge width varies over the length, ensuring continuous contact even in extended states, achieved through curved or segmented designs with kinks and varying radii, promoting effective sealing against foreign body ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniformly wide scraping edges are used on slats, then the structure is simple and manufacturing is easy, but the edges cannot maintain close contact with varying surface contours allowing chip penetration
Solution Approach 1:
The scraping edge is designed with non-uniform width along its length, creating different local geometries. The edge is narrower at the fastening end and wider at the free end, allowing each section to adapt to different surface conditions and maintain contact during slat movement
Solution Approach 2:
The scraping edge features a convex curvature profile rather than a straight line. This curved geometry allows the edge to conform to the varying contours of adjacent slat surfaces during extension and retraction, ensuring continuous contact and effective sealing
2Length of moving object
If the protective cover is extended, then the covering area increases, but the scraping edges lose contact with adjacent slats allowing foreign body ingress
Solution Approach 1:
The convex curvature of the scraping edge enables it to maintain contact with the adjacent slat surface during extension. The curved profile acts as a cam that keeps the edge pressed against the slat, preventing gaps from forming even when the cover is fully extended
Solution Approach 2:
The scraping edge width varies along its length, being narrower at the fastening end and wider at the free end. This parameter variation compensates for the bulging effect of the lamellar body during extension, maintaining consistent contact pressure across the entire edge length
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
Significantly reduces the penetration of chips and foreign bodies by maintaining close contact between slats, enhancing the sealing effect and preventing accumulation on adjacent slats.
Implementation Method 1
the lamellar body bends due to material elasticity can bulge
Data Source
Figure 1~3
Figure 2
Figure 4
AI summary
The invention relates to a variable length protective cover comprising a plurality of lamellae (10). Said lamellae (10) have sharply angled fastening edges (12) and flat angled wiping edges (22) which rest on neighboring lamellae (10). In order to achieve improved impermeability of such a protective cover against penetration by foreign bodies, according to the invention the width of the wiping edges (22) varies over the length of the lamellae (10). The edge (24) of the wiping edges (22) has a convex course over the entire length thereof.