Barrier Arm Counterweight Segmentation for Manual Operation
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Solution Overview
Problem
Existing traffic barriers, especially those at railway and motorway crossings, are hindered by the inability to operate without electric or hydraulic drives, and they lack adjustability in opening forces, making them unreliable in emergency situations or power outages.
Innovation Solution
A barrier system with a counterweight mechanism that allows the barrier arm to pivot from a closed to an open position without electric or hydraulic drives, featuring a separate counterweight with a lever arm and weight body that adjusts the force and leverage ratio, enabling compact design and easy manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed counterweight is arranged on the barrier arm, then the barrier can be balanced for manual operation, but the lever arm must be very long which requires a larger opening in the road
Solution Approach 1:
The barrier arm is divided into two separate lever sections: a first lever section that serves as the barrier arm and a second lever section that serves as the counterweight lever. This segmentation allows the counterweight function to be separated from the barrier arm, enabling compact design without requiring a long lever arm embedded in the road.
Solution Approach 2:
A bearing is introduced as an intermediary element between the first lever section and the second lever section. This bearing allows the two lever sections to work together mechanically while maintaining independence, enabling the counterweight effect without requiring the barrier arm itself to be excessively long.
2Ease of operation
If the barrier arm is made longer to provide counterweight, then balancing is achieved, but the retention level decreases
Solution Approach 1:
By separating the barrier arm into two lever sections with distinct functions, the first lever section can be optimized for retention strength while the second lever section provides the counterweight effect. This allows the barrier arm to be shorter and more massive for better retention, while the counterweight lever provides balancing.
Solution Approach 2:
The first lever section is designed with different properties than the second lever section. The first lever section can be made more massive and shorter for high retention, while the second lever section is optimized for counterweight function. This local differentiation of properties resolves the contradiction between retention and ease of operation.
3Extent of automation
If electric or hydraulic drives are used to operate the barrier, then automated operation is achieved, but the barrier cannot be opened in case of drive failure or power outage
Solution Approach 1:
The barrier system uses a passive counterweight mechanism that automatically balances the barrier arm through gravitational force. This self-service mechanical system requires no external power source and can be operated manually at any time, ensuring reliability in emergency situations while still allowing for optional automated operation.
4Ease of operation
If the second lever section is made longer to provide counterweight, then balancing is achieved, but the overall profile of the barrier expands across the longitudinal axis
Solution Approach 1:
The counterweight mechanism is arranged in a configuration that optimizes space utilization. The second lever section and counterweight are positioned to work within the existing profile constraints, using the vertical and depth dimensions rather than expanding the longitudinal width. This allows balancing to be achieved without increasing the overall profile area.
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 system provides a compact, reliable, and easily operable barrier that can be manually opened in emergencies, maintaining high retention levels and reducing the need for deep road recesses, while allowing for fine adjustments in force and leverage for balanced operation.
Implementation Method 1
a counterweight (7) acting on the second lever section (4). The counterweight (7) is designed separately from the barrier arm (2) and has a lever arm (17), which acts with an active section (11) on the second lever section (4), and a weight body (12), which is connected to the lever arm (17)
Implementation Method 2
a pivot bearing (6, 8) arranged stationary to the road, on which the barrier arm (2) with the bearing point (5) is pivotally mounted about a pivot axis (S6)
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A restraint barrier (1) for arrangement on a roadway (F) with a road surface (O) comprises a barrier arm (2) extending along a longitudinal axis (L) with a first lever section (3) in the form of a barrier arm, a second lever section (4) and a bearing point (5) located between the two lever sections (3, 4), a pivot bearing (6) fixed to the roadway (F) on which the barrier arm (2) with the bearing point (5) is pivotably mounted about a pivot axis (S6), the pivot axis being substantially parallel to the roadway (F), and a counterweight (7) acting on the second lever section (4).The barrier arm (2) can be pivoted about the pivot bearing (6) from a closed position, in which the first lever section (3) is oriented substantially parallel to the road surface (O), to an open position, in which the first lever section (3) is inclined at an angle, in particular perpendicular, to the road surface (O). The counterweight (7) is designed separately from the barrier arm (2) and comprises a lever arm (17) with a weight body (12), which acts on the second lever section (4) via an actuating section (11). The actuating section is connected to the second lever section (4) via a bearing (8), and when the barrier arm (2) pivots, the angle between the lever arm (17) of the counterweight (7) and the barrier arm (2) changes.