Stair-Climbing Stroller Retractable Wheel and Track Mechanism
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Solution Overview
Problem
Conventional baby strollers are unable to traverse inclined surfaces such as staircases effectively, lacking the necessary mechanisms to adapt to different terrain types.
Innovation Solution
A stair-climbing stroller with retractable front and rear wheels for flat surfaces and a pair of tracks for inclined surfaces, powered by motors and batteries, allowing it to transition between wheel-based and track-based movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional baby strollers use fixed wheels for flat surfaces, then they are simple and easy to operate, but they cannot traverse inclined surfaces such as staircases
Solution Approach 1:
The stroller employs dynamically reconfigurable movement mechanisms where wheels can retract and tracks can deploy based on terrain detection. The front and rear wheels are coupled to pivoting support shafts that allow them to retract, while tracks coupled to the stroller body can extend to contact inclined surfaces, enabling the stroller to adapt its configuration from wheel-based to track-based movement
Solution Approach 2:
The stroller integrates multiple movement modes within a single device: wheel-based movement for flat surfaces and track-based movement for inclined surfaces. This multi-functionality is achieved through retractable wheels and deployable tracks, allowing the same stroller to effectively navigate both horizontal and vertical terrains without requiring separate devices
2Adaptability or versatility
If retractable wheels and tracks are added to enable stair climbing, then terrain adaptability improves, but device complexity increases
Solution Approach 1:
The stroller system is divided into independent functional modules: front wheels coupled to a front wheel support shaft, rear wheels coupled to a rear wheel support shaft, left and right tracks, and separate motors for wheel retraction and track drive. This segmentation allows each component to be controlled independently and simplifies the overall system architecture by distributing functions across modular units
Solution Approach 2:
The retractable wheels are nested within the stroller structure, with front and rear wheel support shafts that can pivot to retract the wheels into the stroller body. Similarly, the tracks are coupled to the stroller body in a nested configuration, allowing them to deploy outward when needed and retract when not in use, optimizing space utilization
3Ease of operation
If motors and batteries are added for automated control, then ease of operation improves, but weight and complexity increase
Solution Approach 1:
The stroller incorporates automated control systems where a motor coupled to the stroller body automatically performs wheel retraction and track deployment based on terrain detection, eliminating the need for manual operation. The system can autonomously transition between wheel-based and track-based movement modes, reducing the physical effort required by the operator
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
Enables safe and efficient navigation over flat and inclined surfaces, including staircases, by retracting wheels to lower tracks for stable ascent and descent, utilizing motors and batteries for control.
Implementation Method 1
A wheel retract motor located on the underside of the stroller may cause a retraction drive shaft to pivot the front and rear wheel support shafts, retracting the wheels
Implementation Method 2
Left and right track motors may then be used to drive the stroller up an inclined travel surface using the tracks
Data Source
AI summary
The stair-climbing stroller is a baby stroller with retractable front and rear wheels for use on flat travel surfaces and a pair of tracks for use on inclined travel surfaces including, but not limited to, staircases. The front wheels are coupled to a pivoting front wheel support shaft and the rear wheels are coupled to a pivoting rear wheel support shaft. A wheel retract motor located on the underside of the stroller may cause a retraction drive shaft to pivot the front and rear wheel support shafts, retracting the wheels. When the front and rear wheels retract, the stroller may be lowered such that the left and right track rest on the ground. Left and right track motors may then be used to drive the stroller up an inclined travel surface using the tracks.