Rail Vehicle Bogie Current Collector Mounting on Axle Box
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Solution Overview
Problem
The existing bogie designs for rail vehicles experience significant displacements and vibrations of the current collector relative to the third rail, leading to increased construction costs and operational issues due to the elastic suspension device's buffering action.
Innovation Solution
A bogie design where the current collector is fixedly connected to the axle box, reducing displacements by synchronizing its motion with the axle box, and incorporating a current collector mounting plate with elastic members and sliding shoes to maintain contact with the third rail, thereby minimizing vibrations and impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the current collector is mounted on the frame, then the current collector can be easily installed, but the current collector experiences large displacements and vibrations relative to the third rail
Solution Approach 1:
The patent divides the mounting structure into two independent parts: the frame (for easy installation) and the axle box (for stable contact). The current collector is detached from the frame and mounted on the axle box instead, allowing each component to fulfill its optimal function without compromising the other.
Solution Approach 2:
The axle box serves as an intermediary mounting platform between the wheel set and the current collector. By using the axle box as the mounting base, the system achieves both ease of installation (through modular design) and contact stability (through the axle box's fixed connection to the wheel set).
2Ease of operation
If the elastic suspension device is used, then the rail vehicle achieves smooth operation, but the current collector suffers from increased impact and vibration
Solution Approach 1:
The patent extracts the current collector from the frame's motion cycle and relocates it to the axle box, which has a different motion characteristic. This separation allows the elastic suspension to continue providing smooth operation while the current collector experiences reduced displacement and vibration.
Solution Approach 2:
Instead of mounting the current collector on the frame (which moves significantly), the patent inverts the mounting approach by fixing it to the axle box (which moves less). This inversion of the mounting hierarchy fundamentally changes the motion characteristics experienced by the current collector.
3Device complexity
If the current collector is fixedly mounted on the frame, then the structure is simple, but the steel rail construction requires higher quality and larger costs
Solution Approach 1:
The patent segments the mounting system into frame and axle box components, allowing the current collector to be mounted on the axle box. This segmentation reduces the displacement and vibration transmitted to the third rail, thereby lowering the quality requirements and construction costs of the steel rail infrastructure.
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
This design significantly reduces the displacements and vibrations of the current collector, lowering construction costs and improving operational reliability by ensuring consistent contact with the third rail, thus enhancing the power supply to the rail vehicle.
Implementation Method 1
the connecting shaft is further provided with an elastic member for forcing the top surface of the sliding block against the third rail
Data Source
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AI summary
The present invention provides a bogie for a rail vehicle, including: two pairs of wheel sets arranged frontward and backward (51), axle boxes (52) respectively fixedly arranged at both ends of a central rotating shaft of the wheel set, and a frame arranged on two axle boxes on the same side (50), and further including: a current collector mounting plate (53) that is fixedly mounted with a current collector, with both ends of the current collector mounting plate being respectively fixedly connected to the two axle boxes on the same side. In the bogie for the rail vehicle according to the present invention, the current collector is fixedly connected on the axle box, and thus the current collector has the same state of motion as the axle box, effectively reducing the displacements of the current collector in all directions relative to the third rail during operation, and reducing vibration and impact suffered by the current collector.