Flanged Roller Cover-Plate Clip Structure for Impact Retention
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Solution Overview
Problem
Existing casters used for moving items like furniture and baggage face difficulties in securely fastening and retaining protective cover-plates due to impacts, especially when subjected to rough handling.
Innovation Solution
A caster design featuring an intermediate cover-plate with radial hooks that deform elastically to clip onto the hub, combined with a main cover-plate that secures the intermediate plate using adhesive and protuberances to block the hooks, providing a secure and impact-resistant attachment system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If clips are directly connected to the tread of the wheel to fasten the cover-plate, then the cover-plate can be easily attached, but the clips are directly subjected to impacts which can cause them to fail
Solution Approach 1:
The patent introduces an intermediate cover-plate as a mediator between the wheel hub and the main cover-plate. This intermediate plate absorbs and distributes impact forces, protecting the clips from direct impact while maintaining easy attachment. The intermediate plate is secured to the hub and provides a protected mounting surface for the main cover-plate, thus resolving the contradiction between ease of attachment and impact resistance.
2Reliability
If multiple cover-plates are used to protect the hub, then protection is improved, but the structure becomes more complex
Solution Approach 1:
The patent divides the cover-plate system into two segments: an intermediate cover-plate secured to the hub, and a main cover-plate that covers the intermediate plate. This segmentation allows each plate to perform a specific function - the intermediate plate provides structural support and impact absorption, while the main plate provides aesthetic coverage and additional protection. The segmented design achieves better protective coverage while keeping the overall structure relatively simple through functional specialization.
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 design enhances the ease of assembly and durability of the cover-plate attachment, ensuring the caster remains securely fastened even under impact, while maintaining a simple and cost-effective structure.
Implementation Method 1
two hooks (31, 32) mounted to project from the intermediate cover-plate (21) in such a manner that when the intermediate cover-plate (21) is clipped on the face (12) of the hub (10), the two hooks (31, 32) deform elastically and catch respectively on the first and second radial edge portions (34-1, 34-2) of the hole (30)
Implementation Method 2
at least one spot of adhesive (29) arranged respectively on the intermediate cover-plate (21), these six spots of adhesive (29) being suitable for bonding the main cover-plate (24) to the intermediate cover-plate (21)
Data Source
AI summary
The caster is essentially characterized by the fact that it includes at least one wheel 1 including a hub 10 and a train 11 situated around the hub 10, a cover-plate 21, clip elements 22 suitable for clipping the cover-plate to the hub 10, the clip elements 22 for clipping the cover-plate to the hub 10 including at least one hole 30 made in the hub 10, at least two hooks 31, 32 mounted to project from the intermediate cover-plate 21 so that when the cover-plate 21 is clipped to the hub 10, the two hooks 31, 32 deform elastically and catch on the edge 34 of the hole 30 defining between them an inter-hook empty space 35. Application to casters used for making it easier to move items such as pieces of furniture, suitcases mounted on casters, or the like.