Tubing Formwork Chassis with Spring Suspension
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Solution Overview
Problem
The geometry of segments produced using segment molds deviates from the desired shape due to uneven running wheels, leading to increased mechanical stress and impaired seal effectiveness when used in tunnel linings.
Innovation Solution
Incorporating a chassis arrangement with spring elements that resiliently support the base body, allowing for compensation of unevenness in the subsurface without transmitting torsional forces, ensuring consistent geometry and stability during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the segment formwork is moved on a subsurface with unevenness, then the formwork can be transported to different positions, but torsional forces are transmitted to the base body causing geometry deviations
Solution Approach 1:
The patent introduces a chassis arrangement with spring elements as an intermediary between the running gear and the base body. This mediator absorbs torsional forces generated by uneven subsurface, preventing them from being transmitted to the base body while still allowing the formwork to be moved to different positions.
Solution Approach 2:
The spring elements are pre-installed in the chassis arrangement to cushion and absorb torsional forces before they can be transmitted to the base body. This beforehand cushioning prevents geometry deviations by neutralizing the harmful effects of uneven subsurface in advance.
2Stability of the object's composition
If rigid support is used to ensure stability during movement, then the formwork remains stable, but torsional forces are transmitted causing segment geometry deviations
Solution Approach 1:
The patent changes the mechanical parameter of the support system from rigid to resilient by introducing spring elements. This allows the system to maintain stability through the elastic properties of the springs while simultaneously absorbing torsional forces that would otherwise cause geometry deviations.
3Manufacturing precision
If spring elements are added to compensate for unevenness, then geometry consistency is improved, but device complexity increases
Solution Approach 1:
The patent divides the chassis arrangement into modular components with individual spring elements assigned to specific running wheels. This segmentation allows for targeted compensation of unevenness while keeping each module relatively simple and manageable.
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 maintains a consistent segment formwork geometry, reducing mechanical stress and preserving seal effectiveness by isolating unevenness through spring elements, rather than torsional deformation of the base body.
Implementation Method 1
the chassis arrangement has at least one spring element which resiliently supports the base body
Implementation Method 2
at least one spring element is formed by a helical spring
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The tubbing shell (2) has a base (4), where side panels (6) of the tubbing shell are fastened in a movable manner and is supported on a chassis arrangement with impellers (14a,14c). The chassis arrangement has a suspension element (15), which supports a base (4) in a flexible manner.