Rail Vehicle Coupling Locking Mechanism Prevents Unintended Decoupling
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Solution Overview
Problem
Existing coupling mechanisms for rail vehicles fail to maintain a blocked coupling position when there is a slight traction between coupled clutch heads, leading to unintended decoupling.
Innovation Solution
The control lever and guidance part are designed to lock the coupling mechanism in the coupled position, ensuring it remains locked across all operational conditions by utilizing a cam and spring mechanism that maintains tension and prevents unintended decoupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locking mechanism is designed to allow uncoupling when a slight pulling force is present, then uncoupling becomes possible under light tension, but the non-operated coupling head is not blocked and turns back to the coupled position unintentionally
Solution Approach 1:
The control lever is designed to preemptively block the coupling rod in the uncoupled position before any unintended movement can occur. When one coupling head is actuated to uncouple, the control lever of the non-operated coupling head simultaneously engages to prevent its coupling rod from moving back to the coupled position, thus counteracting the potential harmful effect of light tension pulling it back.
Solution Approach 2:
The control lever acts as an intermediary blocking element between the coupling rod and the coupled position. It physically intervenes to prevent the coupling rod from returning to the coupled position under light tension, thereby ensuring that the uncoupling state is maintained reliably even when slight pulling forces are present.
2Ease of operation
If the control lever is released during uncoupling to allow the coupling rod to escape, then uncoupling can proceed, but the locking mechanism fails to remain blocked under all uncoupling conditions
Solution Approach 1:
The control lever is designed to automatically engage and block the coupling rod in the uncoupled position as a preliminary action that occurs simultaneously with the uncoupling process. This ensures that once uncoupling is initiated, the locking mechanism is already in place to maintain the blocked state, preventing any reversal to the coupled position.
Solution Approach 2:
The control lever provides automatic feedback-based locking: when the coupling rod moves to the uncoupled position, the control lever detects this position change and automatically engages to block further movement. This self-regulating mechanism ensures the locked position is maintained without requiring additional control inputs.
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 ensures secure coupling and decoupling in all scenarios, including slight tractions, by maintaining the locked position through a cam and spring mechanism, preventing unintended decoupling and ensuring safe operation.
Implementation Method 1
The control lever and the guide part form a locking means which, except in the coupled position, is locked
Implementation Method 2
utilizing a cam and spring mechanism that maintains tension and prevents unintended decoupling
Implementation Method 3
a locking element pivotable about an axis therein and a coupling rod movable by said locking element into or out of the housing
Data Source
Figure 1~2
Figure 3~4
AI summary
A device for locking and unlocking a coupling of a rail vehicle is arranged in a housing (11, 21) of a coupling head (10, 20). This device (30) comprises a locking element (33) rotatable therein about a pivot axis (A), a coupling rod (31, 32) movable by the locking element in or out of the housing (11, 21) for coupling with a coupling head to be coupled, a control lever (35) articulated to the locking element (33), and a guide element (38) cooperating with it. This control lever (35) and the guide element (38) form a locking means which is designed such that, except in the coupled position, it causes the control lever (35) to lock onto the guide element (38) and thus the device (30) of the respective coupling head in every uncoupled position. This ensures safe coupling and uncoupling in all operating scenarios.