Monorail Cross-Over Switch Using Articulated Beams
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Solution Overview
Problem
Conventional cross-over guideway switches for monorails require significant space and are expensive due to the need for large, movable curved beams that must be positioned outside the guideway beams during switching, limiting the minimum distance between parallel guideway beams and increasing installation costs.
Innovation Solution
A cross-over switch system with articulated beams and a median beam that pivot to form a continuous segmented beam, allowing for closer spacing of guideway beams by using longitudinally staggered discontinuities and optional clearance segments operated by linkages or actuators to manage clearance, reducing the overall space required for switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional curved replacement beams are used for cross-over switching, then the switch can perform the switching function, but the installation space required is large and the minimum distance between parallel guideway beams is increased
Solution Approach 1:
The beam structure is divided into multiple straight segments that can articulate relative to each other. Instead of using a single large curved beam, the invention employs a series of smaller straight beam segments connected by articulation points, allowing the beam to change configuration from straight to curved through segment movement rather than requiring a large pre-formed curved structure.
Solution Approach 2:
The beam structure transitions from a static curved replacement beam to a dynamic articulated beam system. The articulated beams can change their configuration from a straight aligned position to a curved switching position through articulation at designated points, enabling the switching function without requiring large fixed installation space.
2Ease of operation
If large movable curved beams are positioned outside the guideway beams during switching, then the switching position can be achieved, but the minimum distance between parallel guideway beams is increased
Solution Approach 1:
Instead of positioning the curved replacement beam outside the guideway beams as in conventional designs, the articulated beam segments articulate and abut against each other in a compact configuration that fits within the space between the parallel guideway beams, inverting the conventional spatial arrangement.
Solution Approach 2:
The articulated beam segments nest together in a compact configuration during switching, with each segment fitting within the spatial envelope defined by the parallel guideway beams. The segments abut against each other in a nested arrangement that minimizes the required distance between the outer guideway beams.
3Ease of operation
If two pivotable straight portions of guideway beams are moved out of the way towards the exterior, then the switching position is achieved, but the space consumption and installation cost increase
Solution Approach 1:
The guideway beam is segmented into fixed portions and movable articulated portions. Instead of moving entire straight portions of the guideway beam outward, the invention segments the beam into smaller articulated sections that can pivot and abut against each other in a compact switching configuration, reducing the space required for the switching operation.
4Ease of operation
If conventional cross-over switch design is used, then the switching function is provided, but the installation cost is high
Solution Approach 1:
The beam structure is segmented into multiple straight sections that can be manufactured separately using standard beam fabrication processes and then assembled through articulation connections. This segmentation allows for simpler, more economical manufacturing compared to fabricating large custom-shaped curved replacement beams, thereby reducing installation costs.
Solution Approach 2:
The invention changes the geometric parameters from large-radius curved beams to a series of smaller straight segments with specific articulation angles. This parameter change allows the use of standard beam dimensions and fabrication methods, reducing manufacturing and installation costs while achieving the same switching function.
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 enables monorail vehicles to switch between parallel guideway beams with reduced space requirements, minimizing installation costs and allowing for closer beam spacing without compromising safety or operational efficiency.
Implementation Method 1
Each one of the two articulated beams is made of a chain of pivotably interconnected segments
Implementation Method 2
When in a switching mode, the median beam is pivoted and each segment of each articulated beam is pivoted so that each one of said articulated beam abuts an opposed end of said median beam
Data Source
AI summary
A cross-over switch system for switching a monorail vehicle between two fixed guideway beams is provided. The cross-over switch system includes two articulated beams and a median beam. Each one of the two articulated beams, constructed of a chain of pivotably interconnected segments, and is pivotably connected to a different one of the two parallel fixed guideways. The median beam, which is pivotable in its center, is located at a median distance between the two parallel fixed guideway beams. When in a switching mode, the median beam is pivoted and each segment of each articulated beam is also pivoted so that each one of the articulated beam abuts an opposed end of the median beam.