Forged Fork Coupling Component for Simpler Rail Force Transfer

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Solution Overview

Problem

Existing coupling arrangements for track-bound vehicles face challenges in efficiently transmitting high tensile and compressive forces while requiring complex manufacturing processes and assembly, leading to increased costs and maintenance complexity.

Innovation Solution

A one-piece coupling component that integrates the coupling head housing and coupling rod, featuring a partially open design with a fork structure, is designed as a forged component, allowing for simplified assembly and manufacturing by optimizing force distribution and reducing contact areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If a modular design with detachable end plate and coupling rod is used, then ease of maintenance and serviceability are improved, but device complexity and assembly effort increase

Engineering Contradiction:
Improveease of maintenanceVSAvoiddevice complexity
Core Design Contradiction:
Ease of repairVSDevice complexity

Solution Approach 1:

The coupling head housing is segmented into a main body and an integrated end plate structure, where the end plate forms a one-piece forged component with the coupling rod. This segmentation allows the end plate to be detached for maintenance while keeping the overall structure simpler than traditional modular designs, as the integrated end plate-coupling rod assembly reduces the number of separate components.

Inventive Principle:
Principle #1Segmentation

2Device complexity

If an integral design with single-piece casting is used, then device complexity and assembly effort are reduced, but manufacturing complexity and production time increase

Engineering Contradiction:
Improvedevice complexityVSAvoidmanufacturing complexity
Core Design Contradiction:
Device complexityVSEase of manufacture

Solution Approach 1:

The end plate and coupling rod are merged into a single forged component, creating an integrated structure that eliminates the need for separate manufacturing and assembly of these parts. This merging reduces device complexity and assembly effort while avoiding the manufacturing complexities of traditional single-piece casting by using forging processes that are more suitable for this application.

Inventive Principle:
Principle #5Merging (Combining)

3Adaptability or versatility

If traditional cast coupling head housing is used, then manufacturing flexibility is maintained, but production time and cost increase

Engineering Contradiction:
Improvemanufacturing flexibilityVSAvoidproduction time
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The manufacturing process is changed from casting to forging for the end plate and coupling rod assembly. This parameter change in the manufacturing process reduces production time and cost while maintaining the ability to adapt to different design requirements through the forging process, which offers greater flexibility in creating complex geometries with optimized grain structure.

Inventive Principle:
Principle #35Parameter changes

4Manufacturing precision

If complex quality control measures are implemented, then manufacturing precision and reliability are improved, but production time and cost increase

Engineering Contradiction:
Improvemanufacturing precisionVSAvoidproduction time
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The forged structure of the end plate and coupling rod provides inherent quality advantages through its grain structure and uniform material properties, reducing the need for extensive post-manufacturing quality control measures. The forging process itself creates a self-verifying structure where defects are more easily detected and the material properties are more consistent, thereby reducing production time while maintaining high manufacturing precision.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4392305B1Coupling component and coupling assembly having a coupling component, in particular a central buffer coupling
Publication Date: 2025.12.24 VOITH PATENT GMBH
  • EP4392305B1 patent drawingFigure 1a~2
  • EP4392305B1 patent drawingFigure 3~4a
  • EP4392305B1 patent drawingFigure 4b~5

AI summary

The invention relates to a coupling component (1) for a coupling assembly (16) for mechanically coupling track-bound vehicles, having a main body (2) which extends in a longitudinal direction, in particular along a longitudinal axis (L), is formed as a single piece, and comprises a first axial end region (3), a second axial end region (4) and a shaft region (10) formed between the end regions (3, 4), the first axial end region (3) being designed to provide a receiving region (6) for receiving coupling elements (19) and to form at least one connection region (5) for connecting or fastening a face plate (17). The first axial end region (3) is formed by a fork structure (7), comprising a fork base (12) and at least two fork parts (8.1, 8.2), which extend from the fork base (12) at a distance from each other along both sides of the longitudinal axis and form, at the end region pointing away from the fork base (12), the at least one connection region (5) for fastening a face plate (17).