Movable Shelving Retractable Wheelsets
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Solution Overview
Problem
Conventional shelving units with single wheelsets are inadequate for traversing varied terrain, leading to contamination issues and requiring manual handling or multiple wheelset changes, which are cumbersome and inefficient.
Innovation Solution
A movable base with two interchangeable wheelsets and a mode selector allows the shelving unit to switch between two operational modes, enabling smooth transition over different terrains without contaminating indoor spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single wheelset is provided on shelving units, then the structure is simple and easy to manufacture, but the shelving unit cannot traverse varied terrain and causes contamination issues
Solution Approach 1:
The wheelset system is segmented into multiple independent wheelsets (first wheelset and second wheelset) that can be selectively deployed. Each wheelset is designed with specific characteristics for different terrains, and they operate independently through separate actuators, allowing the shelving unit to adapt to varied terrain without requiring a completely complex redesign of the entire mobility system.
Solution Approach 2:
The wheelset configuration is made dynamic through retractable mechanisms controlled by actuators. The wheelsets can be extended or retracted based on terrain requirements, transforming the static single-wheelset design into a dynamic multi-wheelset system that adapts its configuration in real-time to optimize performance on different surfaces.
2Adaptability or versatility
If multiple wheelsets are provided for different terrains, then terrain adaptability improves, but the device complexity and operation difficulty increase
Solution Approach 1:
The wheelset switching system incorporates self-service features through automated or semi-automated actuator mechanisms that reduce manual intervention. The system can automatically detect terrain conditions or provide intuitive controls that simplify the wheelset switching process, allowing users to change wheelsets without complex procedures or extensive training.
Solution Approach 2:
The actuator system serves multiple functions: it controls both the first and second wheelsets, provides retractable mechanisms for terrain adaptation, and potentially integrates with contamination prevention systems. This multi-functionality reduces the need for separate control mechanisms for each wheelset, simplifying the overall operation despite having multiple wheelsets.
3Object-affected harmful factors
If wheelsets are made retractable, then contamination prevention improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The retractable wheelsets are designed with nested structures where wheel components can be stored within or alongside each other when not in use. The actuators and supporting mechanisms are integrated into the shelving unit's existing structure, nesting control elements within available spaces to minimize additional manufacturing complexity while achieving contamination prevention through retractability.
4Speed
If heavy-duty wheels are used for outdoor terrain, then outdoor mobility improves, but indoor use becomes problematic due to size and potential damage
Solution Approach 1:
Different wheelsets are designed with locally optimized qualities: the first wheelset has large, rugged characteristics specifically tailored for outdoor terrain with its rough surfaces and debris, while the second wheelset has smaller, smoother characteristics optimized for indoor hard floors. Each wheelset's material composition, tread pattern, and size are locally adapted to its intended environment, allowing the shelving unit to excel in both outdoor and indoor settings without compromise.
Data Source
AI summary
A movable shelving unit for moving over ground surfaces in two different modes of operation consisting of a shelving unit and a movable base. The movable base includes a first set of wheels and a second set of wheels, each set of wheels having a first position wherein none of the wheels comprising the wheelset contacts a ground surface and a second position wherein each of the wheels comprising the respective wheelset contacts the ground surface. The movable base also contains a mode selector for moving the various wheelsets between the first and second positions. A brake mechanism is included to reduce movement of a wheelset. The shelving unit can be collapsible to allow for easier transportation and storage. The first wheelset is for moving the shelving unit over rough ground surfaces and the second wheelset is for smooth ground surfaces.