Paddle Shaft Locking Mechanism for Fare Gate Torque Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fare gates in transit systems face mechanical degradation due to constant use, leading to malfunctions, longer queues, operational costs, and security vulnerabilities from fare evasion and unauthorized access.
Innovation Solution
A transmission system with a protection device that includes a locking mechanism integrated at the paddle shaft, activated by a solenoid when torque exceeds a preset threshold, to lock the shaft and stop the gate paddle, preventing unauthorized passage and protecting internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gate paddle is made freely rotatable to allow efficient passage during peak volumes, then ease of operation is improved, but mechanical degradation and fare evasion increase
Solution Approach 1:
The system dynamically changes the state of the paddle shaft between locked and unlocked positions based on operational conditions. During normal operation, the shaft rotates freely to allow efficient passage. When abnormal torque is detected (indicating fare evasion or mechanical abuse), the solenoid engages to lock the shaft, preventing further rotation and protecting the internal components from damage.
Solution Approach 2:
The system incorporates a torque sensing mechanism that continuously monitors the torque applied to the paddle shaft. When the torque exceeds a predetermined threshold, the system automatically activates the solenoid to lock the shaft. This feedback loop enables the system to respond to abnormal conditions in real-time, preventing mechanical degradation while maintaining ease of operation during normal use.
2Reliability
If the gate paddle is locked to prevent fare evasion and mechanical damage, then reliability and security are improved, but ease of operation deteriorates
Solution Approach 1:
The locking mechanism is not static but dynamically activated only when abnormal torque is detected. During normal operation with valid fares, the paddle shaft remains unlocked and rotates freely, maintaining ease of operation. The lock engages only when torque exceeds the predetermined threshold, providing security against fare evasion and mechanical abuse without impacting normal passage.
Solution Approach 2:
The patent replaces traditional mechanical locking mechanisms with a solenoid-actuated system. The solenoid uses electromagnetic force to engage the locking mechanism, providing more precise and reliable control compared to purely mechanical systems. This substitution enables automatic activation based on torque sensing, improving both security and operational ease.
3Reliability
If a locking mechanism is added to the paddle shaft to detect and respond to excessive torque, then protection against mechanical degradation is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is integrated directly into the paddle shaft assembly, merging the protection function with the existing structural components. The solenoid is positioned to directly engage with the paddle shaft, eliminating the need for separate locking assemblies and reducing overall system complexity despite adding protective functionality.
Solution Approach 2:
The system is designed to automatically detect abnormal torque conditions and activate the locking mechanism without requiring external intervention or complex control systems. The torque sensing mechanism and solenoid work together in a self-contained manner, with the paddle shaft itself participating in the locking action, thereby minimizing additional complexity.
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
Prevents fare evasion and reduces mechanical damage, ensuring smooth operation and safety by stopping the gate paddle when excessive force is applied, thus reducing maintenance costs and enhancing security.
Implementation Method 1
The locking mechanism pulls shaft arms of the paddle shaft via a solenoid when torque applied to the paddle shaft reaches a preset threshold
Data Source
AI summary
A transmission system with a protection device to enable access and damage control at a fare gate. The transmission system includes a motor, a gate paddle, and the protection device. The motor rotates a paddle shaft to drive the gate paddle. The gate paddle is operable to allow transmission through the fare gate. The protection device locks the paddle shaft in case of fare evasion at the fare gate. The protection device includes a locking mechanism integrated at the paddle shaft. The locking mechanism pulls shaft arms of the paddle shaft via a solenoid when torque applied to the paddle shaft reaches a preset threshold. The locking mechanism further locks the paddle shaft to stop rotation of the gate paddle and blocks transmission through the fare gate.