Rail Vehicle Shaft Sensor Mounting Strap Design
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Solution Overview
Problem
Rail vehicles present challenges in attaching monitoring devices due to varied and changing structures, requiring complex adaptations and safety checks, making existing attachment methods expensive and inefficient.
Innovation Solution
A device is designed to be coupled to the axle or shaft of a rail vehicle using a strap arrangement that minimizes contact surface, avoids corrosion, and allows for simple and universal attachment, incorporating sensors for data recording and position determination using radio location, satellite navigation, and location filtering methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If measuring devices are attached to the upper outer region of the rail vehicle, then access for data transmission is improved, but attachment complexity increases due to varied structures
Solution Approach 1:
The patent applies universality by using the wheel shaft as a standardized mounting location that can accommodate various measuring devices (speed sensors, location filters, GPS receivers) across different rail vehicle types. The shaft's uniform diameter (160mm or 173mm) worldwide allows a single attachment design to work universally, eliminating the need for complex adaptations to different vehicle structures while maintaining good radio transmission conditions.
2Ease of manufacture
If devices are attached using straps wrapped around the shaft, then installation simplicity is improved, but corrosion risk increases due to contact with the shaft
Solution Approach 1:
The patent introduces an intermediary protective layer (paint or polymer coating) between the strap and the shaft surface. This mediator prevents direct contact between the metal strap and the shaft, eliminating corrosion while maintaining the simple strap-based attachment method. The coating acts as a barrier that preserves both the ease of installation and the structural integrity of the shaft.
3Reliability
If the device is coupled tightly to the shaft, then displacement prevention is improved, but paint damage and notch effects increase
Solution Approach 1:
The patent changes the material parameter of the strap, making it softer than both the paint layer and the shaft material. This parameter change allows the strap to deform and conform to the shaft surface without exerting excessive localized pressure that would damage the paint or create notch effects, while still maintaining sufficient friction and normal force to prevent displacement during operation.
4Ease of manufacture
If the device is arranged off-center on the shaft, then assembly space is improved, but mechanical balance may be affected
Solution Approach 1:
The patent applies the counterweight principle by placing a counterbalancing mass on the opposite side of the shaft from the mounted device. This counterweight compensates for the mass imbalance created by the off-center device arrangement, preventing mechanical vibrations and ensuring stable operation while maintaining the assembly space benefits of off-center positioning.
Data Source
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AI summary
The invention relates to devices and to methods concerning the arrangement of a sensor on the shaft of a rail vehicle.