Rail Switch Locking Mechanism With Single-Actuator Ball Wedging
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Solution Overview
Problem
Existing mechanisms for maneuvering and locking rail switches or moving points in track apparatuses require separate devices for moving and locking needles, which can be inefficient and prone to vibration sensitivity, lacking a unified actuation solution.
Innovation Solution
A mechanism that uses a single actuation device to both move and lock rail needles or mobile tips, incorporating a ball wedging system for enhanced stability and resistance to vibrations, allowing the unlocking element to interact with the locking device for alternating translations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for moving and locking rail needles, then the locking function can be provided, but the device complexity increases and efficiency decreases
Solution Approach 1:
The patent combines the moving and locking functions into a single integrated mechanism. The actuator simultaneously performs both the movement of the rail needle and the engagement/disengagement of the locking element, eliminating the need for separate devices and reducing overall system complexity while maintaining reliable locking functionality.
Solution Approach 2:
The actuator is designed as a multi-functional component that performs multiple operations: moving the rail needle laterally, unlocking the locking element, and enabling the locking element to engage with the stop. This universal component replaces what would traditionally require separate specialized devices, improving efficiency while providing complete locking and moving functionality.
2Device complexity
If a single actuation device is used for both moving and locking, then device complexity is reduced, but the locking stability under vibration may worsen
Solution Approach 1:
The locking element is designed to engage with the stop in advance, creating a pre-established mechanical interlock that secures the rail needle in its target position. This preliminary locking action, combined with the mechanical wedge geometry, ensures that the locking relationship is established before vibrational forces can act on the system, maintaining stability despite the simplified single-actuator design.
3Measurement precision
If the locking device is sensitive to vibrations, then precise positioning can be achieved, but the reliability under vibrational conditions worsens
Solution Approach 1:
The patent converts the potential harm of vibrations into a beneficial self-locking mechanism. The wedge-shaped geometry of the locking element and stop creates a mechanical advantage where vibrational forces and operational forces both contribute to maintaining the locked position. The geometry ensures that forces tending to separate the locking elements also tend to wedge them tighter together, transforming vibrational instability into enhanced locking reliability.
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
Enables efficient and stable operation by using a single device for both translation and locking, providing enhanced resistance to vibrations and ensuring precise positioning of rail switches, thus improving the overall performance and reliability of the track apparatus.
Implementation Method 1
a ball bearing system, the ball bearing system comprising: at least one ball 4a capable of making a radial displacement relative to the axis of translation of the moving element 2 so as to cooperate with at least one groove 2a of the moving element 2
Data Source
Figure 1~1
Figure 2~3
Figure 4a~5
AI summary
The present invention relates to a mechanism for moving / locking in position point switches, characterised in that the mechanism comprises: - an element fixed in position (1) with at least one stock rail, - a translationally movable element (2) fixedly mounted with at least one point switch and capable of being movable in translation by an actuating device (5), - a device (4) for locking the movable element with the fixed element when the movable element is in an end-of-travel position relative to the fixed element so that the point switch of the translationally movable element abuts against its stock rail, - an element (3) for unlocking the locking device, this unlocking element being movable and capable of being moved by an actuating device (5) when the movable element is fixedly locked with the fixed element.