Serviceable Wheel Tread Assembly for Sealed Housing
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Solution Overview
Problem
Non-motorized vehicle wheels incur significant wear and damage, leading to the need for frequent replacements, especially when they contain expensive electronic components, and existing methods often require complete disassembly of the wheel to replace the tread, which can compromise the integrity of sealed components.
Innovation Solution
A wheel assembly with a serviceable tread assembly that can be axially removed and installed without disassembling the housing assembly, using fastening devices and locking features arranged around the circumference to secure the tread to the housing, allowing for easy replacement without opening sealed chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire wheel is replaced when the tread is worn, then the wheel functionality is restored, but the cost increases substantially due to replacing expensive electronic components
Solution Approach 1:
The wheel is divided into two main segments: a reusable housing assembly containing expensive electronic components and a replaceable tread assembly. This segmentation allows the tread to be replaced independently without replacing the entire wheel, thereby reducing cost while maintaining functionality.
Solution Approach 2:
The tread assembly is extracted as a separate serviceable component from the wheel. This extracted tread assembly can be removed and replaced independently, allowing the expensive housing assembly with electronic components to be retained and reused.
2Ease of repair
If the wheel is completely disassembled to replace the tread, then the tread can be accessed, but the sealed chamber containing electronic components must be opened compromising its integrity
Solution Approach 1:
The wheel design segments the tread assembly from the sealed housing assembly. The tread assembly includes its own frame and mounting features that allow it to be accessed and replaced without disassembling the sealed housing, thereby maintaining chamber integrity while enabling easy tread replacement.
Solution Approach 2:
The tread assembly is extracted as a separate serviceable unit that can be removed independently from the sealed housing assembly. This extraction allows tread replacement without opening the sealed chamber, preserving its integrity and protecting electronic components.
3Strength
If the tread is made permanently attached to the wheel, then structural strength is improved, but replacement complexity increases requiring complete wheel disassembly
Solution Approach 1:
The attachment between tread assembly and housing assembly is designed to be dynamically changeable - permanently attached during normal operation for strength, but easily separable when replacement is needed. This is achieved through removable fastening devices and complementary mating features that provide both strong attachment and controlled separability.
Data Source
AI summary
A wheel for a non-motorized vehicle (e.g., a shopping cart) can include a housing assembly and a tread assembly. The housing assembly can be configured to sealingly house electronics or other components. The tread assembly can removably mate with the housing assembly such that the electronics or other components remain closed and/or sealed within the housing assembly when the tread assembly is mated or unmated with the housing assembly.