Replaceable Luggage Caster Shaft With Anti-Rotation Tool Access
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Solution Overview
Problem
Existing luggage cases with non-removable casters are discarded when damaged, leading to waste due to the lack of replaceable options, despite their simple structure and low processing costs.
Innovation Solution
A luggage caster design featuring a vertical shaft with a riveting hole and anti-rotation tool hole, allowing for easy disassembly and replacement using common tools, integrated with a wheel frame and limiting fasteners for secure installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-removable casters are used with simple structure and low processing costs, then manufacturing cost is reduced, but replacement and maintenance become impossible leading to waste
Solution Approach 1:
The caster is divided into separable components: the wheel assembly and the vertical shaft with installation head. The installation head can be removed from the luggage bottom support, allowing the caster to be detached and replaced while keeping other parts intact.
Solution Approach 2:
The caster design transitions from a fixed non-removable state to a dynamically replaceable state. The installation head with threaded structure and limiting fastener enables the caster to be installed and removed as needed, providing operational flexibility.
2Strength
If riveting method is used to secure the caster, then installation is simple and strong, but replacement requires drilling equipment and is complex
Solution Approach 1:
The fixation mechanism is segmented into removable components: the installation head with threaded structure and the limiting fastener. This allows the caster to be secured strongly during use but easily removed by simply unscrewing the fastener without drilling.
Solution Approach 2:
The fixation method changes from permanent riveting to a reversible threaded connection. The limiting fastener can be screwed in to provide strong fixation during use, and unscrewed for easy replacement, changing the parameter of fixation permanence.
3Ease of manufacture
If traditional riveting casters are designed, then structure is simple and processing cost is low, but adaptability for different luggage types is limited
Solution Approach 1:
The installation head with threaded structure and limiting fastener design makes the caster adaptable to different luggage bottom support types. The same caster can be installed on various luggage cases, enhancing universality while maintaining simple structure.
Data Source
AI summary
A luggage caster for maintenance and replacement includes a wheel frame, a vertical shaft, and trolley wheels in a clearance fit with the wheel frame. The vertical shaft is configured to rotate axially within a vertical shaft hole of the wheel frame. a bottom end of the vertical shaft defines a riveting hole for forming a riveting flange. A top end of the vertical shaft is provided with a limiting plate that cooperates with the riveting flange to achieve an axial limitation of the vertical shaft in the vertical shaft hole. The top end of the vertical shaft is further provided with an installation head that protrudes from the limiting plate. The installation head is configured to insert into a shaft hole of a luggage bottom support. The riveting hole of the vertical shaft extends axially along the vertical shaft to define an anti-rotation tool hole.