Impact-Rotating Barrier Boom Hinge for Railway Crossing Safety
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Solution Overview
Problem
Existing mobile barriers face issues such as the need for structural modifications based on installation side, potential dangerous situations due to complete breakage, and cumbersome visual inspection for continuity checks, particularly at railway level crossings.
Innovation Solution
A mobile barrier with a modular, lightweight boom structure and connection means that allow the boom to rotate relative to a mounting end portion around a third axis when impacted, featuring a hinge mechanism and an alarm system to detect impacts, ensuring the boom remains connected up to a predefined threshold force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the barrier is designed to break completely upon impact to protect the drive unit, then the drive unit is protected from damage, but the broken part may end over the rails causing potentially dangerous situations
Solution Approach 1:
The barrier is divided into modular sections that can rotate independently relative to each other upon impact, rather than breaking completely. This segmentation allows the barrier to absorb impact energy through controlled rotation while maintaining connection to the mounting end portion, preventing parts from ending up in dangerous positions.
Solution Approach 2:
The hinge mechanism is pre-configured to allow controlled rotation upon impact, acting as a cushioning element that absorbs impact energy before it can cause complete breakage or dangerous positioning. This beforehand preparation of the rotation capability protects both the drive unit and prevents hazardous situations.
2Adaptability or versatility
If the barrier structure is modified for different installation sides (left or right), then the barrier can be adapted to various installation locations, but the device complexity increases
Solution Approach 1:
The hinge mechanism is designed as a universal component that can accommodate installation on either the left or right side of the path without requiring structural modifications to the barrier itself. The rotation capability and connection means are configured to work independently of the installation side, allowing the same barrier design to be used universally.
Solution Approach 2:
The hinge mechanism introduces dynamic rotation capability that allows the barrier to adapt to different installation configurations without requiring static structural modifications. The rotational degrees of freedom enable the barrier to function correctly whether installed on the left or right side, providing adaptability through motion rather than structural variation.
3Reliability
If sheer wires are used to check structural continuity, then the continuity of the barrier can be monitored, but the realization becomes cumbersome and visual inspection is required
Solution Approach 1:
The mechanical hinge mechanism with defined rotation thresholds replaces the need for sheer wires and visual inspection systems. The hinge's mechanical design inherently provides continuity information through its rotation capability, eliminating the need for separate continuity monitoring mechanisms and their associated complexity.
4Stability of the object's composition
If the barrier is designed to remain fully connected upon impact, then structural continuity is maintained, but the drive unit may be damaged by impact forces
Solution Approach 1:
The hinge mechanism transforms the static connection into a dynamic system that allows controlled rotation upon impact. This dynamic capability maintains barrier continuity for normal operation while providing a release mechanism for impact forces, protecting the drive unit from damage without requiring complete disconnection.
Solution Approach 2:
The hinge mechanism changes the mechanical parameters of the connection, allowing rotation beyond a certain threshold force. This parameter-based design maintains connection stability under normal conditions while automatically adjusting to allow rotation when impact forces exceed the hinge's designed threshold, protecting the drive unit.
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 solution enables easy installation on either side of the path, reduces potential dangers by preventing complete disconnection, and enhances continuity checks with automatic alerts, improving safety and ease of reassembly.
Implementation Method 1
connection means (20) configured to connect the barrier (3) to the mounting end portion (4) so that they rotate substantially solidly with each other... allowing the barrier (3) to rotate relative to the mounting end portion (4) around a third axis (Z) when the barrier (3) is hit by a body which exerts on the barrier a force higher than a predefined threshold; wherein the connection means comprise an elastic element (7)
Data Source
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AI summary
Mobile barrier (1) for allowing/blocking the flow of traffic along a transit path (P), comprising: - a mounting end portion (4) configured to be coupled to a drive unit suitable for rotating the mobile barrier (1) around a first axis (X) between a raised position where the flow of traffic along the transit path (P) is allowed and a lowered position where the flow of traffic is at least temporarily blocked; - a barrier boom (3) which extends longitudinally along a second axis (Y) transversal to the first axis (X); and - connection means (20, 6, 7, 8) which interconnect mechanically the mounting end portion (4) to one end of the barrier boom (3). The connection means (20, 6, 7, 8) are configured to connect the barrier boom (3) to the mounting end portion (4) so that they rotate substantially solidly with each other around the first axis (X) between the raised position and the lowered position, and further to allow the barrier boom (3) to rotate relative to the mounting end portion (4) around a third axis (Z) transversal to the first and second axes (X, Y) when the barrier boom (3) is hit by a body which exerts on the barrier boom (3) a force whose component directed along the transit path (P) is higher than a predefined threshold.