Gauge-Changing Rail Structure With Lateral Wheelset Positioning
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Solution Overview
Problem
Current gauge-changing bogies face issues with inaccurate positioning due to guide rail gaps, leading to increased lateral pressure and vertical friction, which can cause locking and unlocking problems and potentially damage the wheelset.
Innovation Solution
A ground gauge-changing structure with a gauge-changing bogie that includes a pair of support rails, guide rails, and a pushing and positioning device that applies a lateral thrust to the gauge-changing wheelset through unlocking and locking sections, ensuring precise positioning and smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wheels are directly laterally positioned through guide rails, then the structure is simple, but inaccurate positioning occurs due to guide rail gaps causing increased lateral pressure and vertical friction
Solution Approach 1:
A pushing device is introduced as an intermediary mechanism between the guide rails and the wheelset. This device actively pushes the wheelset laterally to compensate for positioning errors caused by guide rail gaps, thereby achieving accurate positioning without requiring extremely tight gap tolerances that would increase structural complexity.
Solution Approach 2:
The pushing device performs preliminary positioning action before the wheelset enters the locking section. By pre-positioning the wheelset accurately, the system prevents excessive lateral pressure on the locking mechanism, ensuring smooth locking operation without requiring overly complex tolerance control in the guide rail gaps.
2Measurement precision
If guide rail gaps are reduced to improve positioning accuracy, then positioning precision improves, but manufacturing complexity and cost increase
Solution Approach 1:
The pushing device serves as a mediator that decouples the relationship between guide rail gap size and positioning accuracy. Instead of relying solely on small guide rail gaps to achieve accurate positioning, the pushing device actively corrects positional deviations, allowing larger, easier-to-manufacture guide rail gaps while maintaining high positioning accuracy.
3Reliability
If lateral pressure on locking pins is increased to ensure secure locking, then locking reliability improves, but vertical friction increases causing blocking of unlocking and locking actions
Solution Approach 1:
The pushing device performs preliminary positioning to ensure the wheelset is accurately positioned before entering the locking section. This preliminary action reduces misalignment between the locking pins and their receptacles, thereby reducing vertical friction during locking and unlocking operations while maintaining secure locking through proper alignment rather than excessive lateral pressure.
4Measurement precision
If the gauge-changing wheelset is forcibly positioned to overcome positioning errors, then positioning accuracy improves, but damage to the gauge-changing wheelset occurs
Solution Approach 1:
The pushing device performs preliminary positioning in a controlled manner before the wheelset enters the locking section. This gradual, controlled positioning prevents sudden forced positioning that could damage the wheelset, while still achieving the required positioning accuracy for successful locking.
Solution Approach 2:
The pushing device acts as a cushioning mechanism that gradually adjusts the wheelset position rather than allowing sudden impacts or forced positioning. This beforehand cushioning protects the wheelset structural integrity while achieving accurate positioning for the locking operation.
Data Source
Figure 1~3(b)
Figure 4(a)~7(b)
Figure 8(a)~10(b)
AI summary
A ground gauge-changing structure for a gauge-changing bogie includes a pair of support rails (10) provided in parallel and a pair of first guide rails (20), a pair of gauge-changing guide rails (30), and a pair of second guide rails (40) provided in sequence along interior sides of the pair of support rails (10); an unlocking section (50) is provided between each of the first guide rails (20) and each of the gauge-changing guide rails (30), and a locking section (60) is provided between each of the gauge-changing guide rails (30) and each of the second guide rails (40); an inner/exterior side of the unlocking section (50) and an inner/exterior side of the locking section (60) are respectively provided with a pushing and positioning device (70) which applies a lateral thrust to a gauge-changing wheelset (80) passing through the unlocking section (50) and the locking section (60). The lateral thrust is applied by the pushing and positioning device (70) to the gauge-changing wheelset (80), so that both sides of the gauge-changing wheelset (80) are slightly displaced relative to the guide rails on which the gauge-changing wheelset runs, so as to readjust the positional relation between the components matched with each other on the gauge-changing wheelset (80), and facilitate improvement of the positioning precision, and ensure smooth unlocking and locking of the gauge-changing wheelset.