Railway Coupling Play Limitation via Adjustable Pressure Means
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Solution Overview
Problem
The existing coupling systems for rail vehicles face challenges in limiting play between components and ensuring stability under tension or pressure, which affects the functionality and security of the pulling and pushing devices.
Innovation Solution
An adjustable pressing means is integrated into the connecting head, comprising a pressure plate, connecting elements, and a guide disk, allowing for selective play adjustment between the connecting head and spring elements, and the housing structure is fixed in the vehicle body using clamping wedges for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adjustable pressing means is integrated into the connecting head to limit play between components, then the stability and reliability of the coupling system is improved, but the device complexity increases
Solution Approach 1:
The pressing means is nested within the connecting head assembly, with the pressure plate, connecting elements, and guide disk integrated into the existing structure. This nesting approach allows the pressing function to be incorporated without significantly increasing overall device complexity, as the components are housed within the connecting head's existing spatial envelope.
Solution Approach 2:
The pressing means is divided into discrete functional segments: the pressure plate for applying force, the connecting elements for structural linkage, and the guide disk for positioning. This segmentation allows each component to be optimized independently while maintaining overall system reliability, and facilitates easier manufacturing and assembly.
2Reliability
If the housing structure is fixed in the vehicle body using clamping wedges for enhanced stability, then the reliability of the mounting is improved, but the ease of assembly and maintenance deteriorates
Solution Approach 1:
The clamping wedges are designed with adjustable positioning capabilities, allowing them to be dynamically positioned during assembly and then locked into place. This dynamic adjustment feature enables reliable fixation while maintaining ease of assembly, as the wedges can be easily repositioned and secured without complex tools or procedures.
Solution Approach 2:
The clamping wedges act as intermediary elements between the housing structure and the vehicle body recess. These wedges provide a mechanical mediation that simplifies the connection process, allowing the housing to be securely fixed through a simple wedging action rather than requiring complex fastening mechanisms.
3Adaptability or versatility
If the pressure plate is designed to be adjustable in the axial direction to limit play, then the adaptability of the coupling system is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The pressure plate incorporates self-adjusting mechanisms that allow it to automatically position itself in the axial direction based on the assembly conditions and load requirements. This self-service capability reduces the need for high-precision manufacturing, as the system can compensate for manufacturing tolerances through its own adjustment mechanisms during assembly or operation.
Solution Approach 2:
The pressure plate's axial position is designed to be variable rather than fixed, allowing the system to adapt to different play requirements by changing the positional parameter. This parameter variability enables the coupling system to accommodate different operating conditions and wear states without requiring high-precision manufacturing tolerances.
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 effectively limits play and enhances the stability of the coupling system, ensuring secure operation under various loads by allowing adjustable compression and damping of forces, while facilitating easy assembly and maintenance.
Implementation Method 1
spring elements absorbing tension or compression
Implementation Method 2
pressure means rests on the rear side against the spring element with a compressive force
Implementation Method 3
at least one wedge surface is formed, which interacts with adjustable wedges and by means of which the spacer element can be permanently braced
Data Source
Figure 1~2
Figure 3~5
AI summary
A device (10) comprising a bracket and a pull and push device of a coupling system for a rail vehicle is provided with a housing structure (15), a support element (16) arranged therein, a drawbar (11) mounted axially (A) on the latter, a connecting head (20) connected to the drawbar (11), and preferably several spring elements (13) arranged in series on the drawbar (11) between it and the support element (16). A connecting member (29) for a coupling head is pivotally attached to the connecting head (20), while an axially (A) adjustable pressure element is mounted in it, which bears against the spring element (13") supporting the end face of the connecting head (20) at its rear and forms a contact surface at its front. This contact surface can be brought into contact with an end face of this connecting member (29), which is pivotally attached to the connecting head (20), at least when the latter pivots.This creates a play limitation between the connecting link, the connecting head and the spring elements.