Bogie Curve Detection Sensor Wedge Mechanism
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Solution Overview
Problem
Existing systems for detecting entry into a curve of a rail vehicle body structure equipped with bogies are complex, bulky, and difficult to calibrate, necessitating a simpler and more adaptable solution.
Innovation Solution
A mechanical sensor system positioned on the bogie, which transitions from an inactive to an active position as the bogie pivots relative to the body structure during a curve, utilizing a spring-loaded mechanism and pneumatic energy to trigger an ancillary system, such as wheel flange lubrication, by changing its contact with a wedge mounted on the body structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical rod return system is used to detect curve entry, then the detection function is achieved, but the system becomes complex and bulky
Solution Approach 1:
The patent extracts the essential detection function from the complex mechanical rod return system. Instead of using the entire complex mechanism, only the critical pivot movement is detected through a simplified sensor-wedge arrangement mounted on the bogie frame, eliminating unnecessary mechanical components while preserving curve detection capability
Solution Approach 2:
The patent replaces the complex mechanical rod return system with a simpler mechanical sensor and wedge arrangement. The sensor detects the pivot position of the bogie frame relative to the vehicle body through direct contact with the wedge, substituting the elaborate rod mechanism with a more compact and manageable detection system
2Reliability
If a mechanical sensor with wedge is used to trigger lubrication system, then curve detection is achieved, but the system remains bulky and difficult to calibrate
Solution Approach 1:
The mechanical sensor and wedge system is designed to be self-calibrating through the natural pivot movement of the bogie frame. As the bogie pivots during curve entry, the sensor automatically engages and disengages from the wedge at the appropriate positions, eliminating the need for manual calibration while ensuring accurate detection
Solution Approach 2:
The detection system is segmented into independent modular components: the sensor mounted on the bogie frame, the wedge mounted on the vehicle body, and the spring mechanism. This segmentation allows each component to be independently adjusted and calibrated, simplifying the overall calibration process while maintaining detection accuracy
3Reliability
If the sensor is positioned to detect bogie pivot, then curve entry is detected, but the system becomes bulky
Solution Approach 1:
The patent merges the detection function with the existing bogie pivot mechanism. The sensor and wedge are positioned to utilize the natural pivot movement of the bogie frame relative to the vehicle body, combining the detection function with the existing mechanical motion without requiring separate bulky detection mechanisms
Solution Approach 2:
The wedge acts as an intermediary element between the sensor and the bogie pivot movement. The sensor detects the position of the wedge, which in turn reflects the pivot position of the bogie frame, creating a compact detection arrangement that translates mechanical motion into detectable sensor signals without requiring bulky 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 system effectively detects curve entry with reduced bulk and complexity, ensuring reliable operation across various curve radii and vehicle configurations, while providing efficient activation of ancillary systems like wheel flange lubrication only during curve traversal.
Implementation Method 1
A mechanical sensor system positioned on the bogie, which transitions from an inactive to an active position as the bogie pivots relative to the body structure during a curve, utilizing a spring-loaded mechanism
Data Source
Figure 1~1A
Figure 2~5
Figure 6~9
AI summary
The invention relates mainly to a system for detecting the entry into a curve of a railway vehicle body structure equipped with bogies, and is essentially characterized in that it comprises at least one mechanical sensor (1) capable of connecting a pneumatic energy source (23) to an auxiliary system (25), and capable of adopting a first inactive position corresponding to a straight-line movement of the body structure and in which said sensor (1) prohibits the supply of pneumatic energy to the auxiliary system (25), and a second active position corresponding to a movement of the body structure in a curve and in which the sensor (1) allows the supply of pneumatic energy to the auxiliary system (25), and in that the sensor (1) attached to a bogie is in its first inactive position in contact with a wedge (3) attached to the body structure, and in its second active position free from said wedge (3),the transition from the first to the second position and vice versa occurs through the change in contact pressure of the sensor (1) on the wedge (3) caused by the relative displacement of said body structure with respect to the bogie when the body structure enters or exits a curve.