Slotted Axle Bearing Web for Quieter Wheeled Waste Bins
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Solution Overview
Problem
Wheeled waste-collection bins produce noise due to vibrations transmitted by the axle and wheels, especially over rough surfaces, which existing solutions attempt to mitigate with tight bearing tolerances or additional parts like springs and elastomer linings, but these solutions increase manufacturing costs and complexity.
Innovation Solution
A wheeled waste-collection bin design featuring a bearing with a radial slot web that deforms elastically to maintain the axle in place, reducing vibration transmission and noise without requiring additional parts or complex assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If tight bearing tolerances are used to reduce radial clearance, then noise is reduced, but mounting difficulty increases significantly
Solution Approach 1:
The patent changes the tolerance parameters of the bearing opening, initially providing a relatively large radial clearance to facilitate easy mounting of the axle, while compensating for noise through the elastic deformation capability of the web structure rather than relying on tight tolerances
Solution Approach 2:
The web acts as an intermediary element between the bearing opening and the axle, absorbing vibrations and reducing noise transmission through its elastic deformation, thereby eliminating the need for tight tolerance mounting
2Ease of manufacture
If radial clearance is increased to ease mounting, then mounting becomes easier, but noise increases due to axle movement
Solution Approach 1:
The web is designed with elastic deformation capability beforehand to cushion and absorb the vibrations and movements of the axle within the bearing opening, preventing noise generation while maintaining easy mounting conditions with larger radial clearance
3Object-generated harmful factors
If additional parts like springs or elastomer linings are added to reduce noise, then noise is reduced, but device complexity and manufacturing cost increase
Solution Approach 1:
The noise reduction function is merged into the web structure that is already part of the bearing assembly, eliminating the need for separate springs or elastomer linings. The web itself provides the vibration absorption and noise reduction through its elastic deformation capability
Solution Approach 2:
The web structure serves dual purposes: supporting the bearing opening structure and simultaneously absorbing vibrations to reduce noise, making the system self-sufficient without requiring additional dedicated noise reduction components
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 web effectively absorbs vibrations and reduces noise generation, simplifying manufacturing and assembly while avoiding the drawbacks of previous solutions, resulting in a significant decrease in noise levels during bin operation.
Implementation Method 1
a web comprising at least one radial slot, such that the web it is able to receive and maintain the axle within the opening by deforming elastically when the axle is introduced into the opening
Implementation Method 2
By virtue of the presence of such a web, the axle is maintained within the opening by a flexible element such that the mechanical vibrations of the axle and/or of the wheels are not transmitted, or at best faintly, to the container
Data Source
Figure 1
Figure 2
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AI summary
The invention concerns a wheeled waste-collection bin comprising : - an axle carrying at least one wheel; and - a container provided with at least one bearing (22) for supporting the axle, said bearing being provided with an opening (24) in which said axle can be introduced. The bearing (22) also comprises, around the opening (24), a web (30) comprising at least one radial slot (34), such that the web (30) is able to receive and maintain the axle within the opening (24) by deforming elastically when the axle is introduced into the opening (24).