Rail Transit Safety Footboard with Retractable Sliding Frame
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Solution Overview
Problem
The existing solutions for reducing the gap between rail transit platforms and train bodies fail to adequately address safety hazards for passengers, particularly for disabled individuals, infants, and those wearing high heels, and also lead to high maintenance costs due to friction damage.
Innovation Solution
A safety footboard system comprising a fixed frame base, a sliding frame, and a footboard member, where the sliding frame is connected to the fixed frame base via guide rails and a guiding device, driven by a motor with racks to extend or retract, reducing friction and allowing for adjustable extension to accommodate different gap widths without obstructing the train's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed rubber footboards are installed at the platform edge to reduce the gap between platform and train body, then passenger safety is improved by reducing tripping hazards, but the train body and footboard rub and impact during train movement causing damage and high maintenance costs
Solution Approach 1:
The footboard is designed to be movable rather than fixed, allowing it to dynamically adjust its position. The movable footboard can retract from the platform edge when the train arrives, eliminating friction and impact damage during train movement, while still providing gap coverage when needed for passenger safety.
Solution Approach 2:
The harmful friction and impact effects are eliminated by removing the footboard from the platform edge during train arrival. The footboard is extracted or retracted away from the interaction zone between the train body and platform, preventing damage while maintaining safety functionality when repositioned.
2Length of stationary object
If fixed rubber footboards are installed to reduce the gap between platform and train body, then the gap is reduced, but the footboards cause high damage rates and maintenance costs due to repeated friction and impact
Solution Approach 1:
The footboard transitions from a static fixed position to a dynamic movable position. By retracting the footboard during train arrival and only deploying it when the train is stationary, the system maintains gap reduction benefits while eliminating the repeated friction and impact that cause damage and high maintenance costs.
3Ease of repair
If a movable footboard system is implemented to reduce friction damage, then maintenance costs are reduced, but the device complexity increases due to additional driving mechanisms and control systems
Solution Approach 1:
The complex mechanical driving mechanisms are replaced with simpler actuation systems. The patent employs straightforward motor-driven rack and pinion mechanisms or similar simple actuators that provide reliable footboard movement without requiring complex mechanical linkages, control systems, or maintenance-intensive components.
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
The safety footboard effectively mitigates safety hazards by adjusting to different gap widths, reduces the fault rate of the drive system, and ensures stability and safety during operation, while minimizing damage and maintenance costs.
Implementation Method 1
a gear is fixed on the driving rod of the driving motor and engaged with the racks on the sliding frame, driving the racks
Implementation Method 2
racks are fixed on the sliding frame along the extending or retracting direction of the sliding frame, the racks are driven by the driving motor, pushing or pulling the sliding frame
Implementation Method 3
the guide rails and guiding device is a guide rails and roller type slider assembly
Implementation Method 4
the sliding frame is arranged within the fixed frame base, being in sliding connection with the fixed frame base through guide rails and guiding device
Data Source
AI summary
A safety footboard for a rail transit station comprises a fixed frame base, a sliding frame, and a footboard member, the footboard member being fixed in the front of the sliding frame. The sliding frame is arranged within the fixed frame base, being in sliding connection with the fixed frame base, and horizontally extending from and retracting to the fixed frame base with the guidance of guide rails and guiding means. A driving motor is fixed on the fixed frame base, and racks are fixed on the sliding frame, the racks being driven by the driving motor, pushing or pulling the sliding frame to extend from or retract to the fixed frame base.