Detachable Power Module for Electric Wheelchairs
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Solution Overview
Problem
Conventional electric wheelchairs are cumbersome due to the weight of their components, such as motors, control circuits, and batteries, making them difficult to transport and limiting the mobility of disabled individuals to desired locations.
Innovation Solution
A detachable power module system that includes a central shaft, power module, engaging unit, and releasing unit, allowing the power module to be easily assembled and disassembled from the wheel shaft, reducing the overall weight of the wheelchair by enabling the removal of the power module when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a power module is installed in the wheel chair to reduce physical energy consumption, then the convenience of use is improved, but the weight of the wheel chair increases
Solution Approach 1:
The power module is designed as a detachable component that can be separated from the wheel chair body. This segmentation allows the power module to be removed when not in use, reducing the overall weight of the wheel chair while maintaining the option to use electric assistance when needed.
Solution Approach 2:
The power module transitions from a fixed installation to a dynamic, removable configuration. The engaging unit and releasing unit enable the power module to be easily attached and detached, allowing the wheel chair to adapt its weight and functionality based on user needs.
2Power
If a power module is installed in the wheel chair to reduce physical energy consumption, then the power is improved, but the device complexity increases
Solution Approach 1:
The power module is segmented into distinct functional components (engaging unit, releasing unit, central shaft) that can be independently manufactured and assembled. This modular approach simplifies the overall system design and maintenance while providing sufficient power assistance.
Solution Approach 2:
The complex power module components are extracted as separate detachable units from the wheel chair structure. This extraction reduces the permanent complexity of the wheel chair system while maintaining the capability to add power assistance when needed.
3Ease of operation
If the power module is made detachable to reduce weight, then the ease of transport is improved, but the reliability may worsen
Solution Approach 1:
The engaging unit is designed with preliminary positioning features that guide the central shaft into proper alignment with the wheel shaft before final engagement. This preliminary action ensures reliable connection while maintaining ease of attachment and detachment for transport.
Data Source
AI summary
A disassembled and assembled power module includes: a wheel shaft; a power module; a central shaft, arranged in the power module and passing through the wheel shaft; and an engaging unit, capable of fastening the central shaft to the wheel shaft. In an embodiment when the detachable power module is applied in an electric driven wheelchair, it enables the weight of the wheelchair to be reduced by simply detach and remove the detachable power from the wheelchair so that the electric driven wheelchair without the heavy power module can be carry and transport easily, and also the moving range of the electric driven wheelchair can be increased as its power module can be easily detached and replaced with another fully charged power module so that the range anxiety of the disabled person using the same or the assistant can be relieved.