Rolling Assembly Expander with Segmented Inserts for Shock Fixation
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Solution Overview
Problem
Existing extensors for rolling sets suffer from detachment issues during large deformations, such as shocks, and are vulnerable to temperature-related mechanical hold failures due to material dilation differences.
Innovation Solution
The extensor design features several cavities on its circumference, equipped with removable fixing interfaces for independent rigid inserts. These inserts are securely held in place by elastomeric bridges, allowing for deformation absorption during shocks while maintaining a robust fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single decorative ring is attached to the extender periphery, then aesthetic customization is achieved, but the fixation becomes vulnerable to detachment during large deformations
Solution Approach 1:
The patent divides the single decorative ring into multiple independent inserts distributed around the extender periphery. Each insert is independently fixed within its own cavity, allowing local deformation without compromising the fixation of other inserts. This segmentation transforms a single-point failure risk into a distributed system where individual components can move independently during shocks while maintaining overall structural integrity.
2Strength
If rigid materials are used for the decorative ring, then structural strength is improved, but temperature-related mechanical hold failures occur due to material dilation differences
Solution Approach 1:
The patent applies different material properties to different components: rigid inserts provide structural strength and aesthetic appearance, while the elastomeric material of the extender body provides flexibility and thermal compliance. The elastomeric bridges within cavities allow for differential thermal expansion between the rigid inserts and the extender, absorbing expansion forces and preventing detachment during temperature variations.
3Reliability
If the extender uses elastomeric material for flexibility, then shock absorption is improved, but the fixation of rigid inserts becomes vulnerable during high-speed rolling
Solution Approach 1:
The patent creates a composite structure where rigid inserts are embedded within elastomeric material. The elastomeric bridges surrounding each insert provide both flexibility for shock absorption and sufficient mechanical interlocking for secure fixation during high-speed rolling. The composite design allows the rigid inserts to maintain their shape and position while the elastomeric material deforms to absorb impacts.
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 provides a robust and customizable extensor design that maintains fixation even under large deformations and high-speed conditions, while allowing for aesthetic customization and protection from external damage.
Implementation Method 1
The extender undergoes significant deformation, for example, when impacting a curb
Data Source
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AI summary
The invention relates to an expander for a rolling assembly, comprising a tyre (2), having two beads (21) and a rim (3), the expander (1) being intended to join one of the beads (21) and the rim (3). Said expander (1) comprises an axially inner end (10), an axially outer end (11) and a body (12) such that, when it is mounted within the assembly, said axially inner end (10) is intended to be immobilised on said rim using an inner reinforcing element (14), said axially outer end comprising an outer reinforcing element (15) being intended to receive a bead (21) of the tyre (2). According to the invention, said axially outer end (11) comprises a front face (30) provided with a plurality of cavities (20) distributed over the circumference thereof, said cavities being open at said face and being produced so as to cooperate with means (35) for removably attaching a plurality of adjacent inserts (40).