Segmented Clamping Mechanism for Height-Adjustable Street Cap
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Solution Overview
Problem
Existing height-adjustable street boxes with complex clamping mechanisms face difficulties in handling and require high forces for height adjustment due to the use of continuous clamping rings or sealing lips, making them structurally complex and challenging to operate.
Innovation Solution
The implementation of slotted or segmented circular clamping means that are inwardly protruding, allowing for easier insertion and positioning of the upper part, reducing manufacturing costs and tolerances, while maintaining a sealing effect against coarse particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If continuous clamping rings or sealing lips are used to fix the upper part, then the clamping effect is strong, but the handling becomes difficult and high forces are required for height adjustment
Solution Approach 1:
The continuous clamping ring is divided into multiple separate clamping elements (U-shaped clamping elements with legs) that are distributed around the circumference. This segmentation allows each element to be independently deformable, reducing the overall force required for insertion and adjustment while maintaining effective clamping at each contact point.
2Device complexity
If continuous clamping rings are used, then the structure is simple, but the device complexity increases due to additional components
Solution Approach 1:
The clamping function is segmented into multiple independent U-shaped elements that can be integrated into the lower part structure. Each element acts as an independent clamping unit, simplifying the overall design while improving operability through reduced insertion forces and easier height adjustment.
3Reliability
If radial sealing lips are provided, then the clamping securing is effective, but the manufacturing tolerances required are small and handling is problematic
Solution Approach 1:
The clamping elements are designed with specific geometric parameters including leg spacing, leg curvature, and engagement surface orientation. These parameter optimizations allow the elements to self-adjust during insertion, compensating for manufacturing tolerances while maintaining reliable clamping and sealing effects.
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 simplified clamping mechanism enables easy handling and adjustment of the street box with reduced effort, allowing for larger tolerances and lower production costs, while maintaining a sufficient sealing effect for road construction applications.
Implementation Method 1
The clamping means are designed as a slotted or segmented circular ring protruding inwards... the individual clamping segments can be bent or deformed more easily
Data Source
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AI summary
The height-adjustable street-cap has an upper part (1) serving for incorporation of a cover and a lower part (2) supporting the upper part. The upper part with a cylindrical pipe section (3) is inserted into the lower part for height adjustment and is telescopically movable. The clamping units (6) that are projecting inwards are assigned to the upper edge of the lower part. The clamping units generate a lower clamping effect between the upper part and the lower part. The clamping units are designed as slotted or segmented circular ring projecting inwards.