Railway Cantilever With Shaped Coupling For Insulator Adjustment

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Solution Overview

Problem

Existing cantilevers for supporting live cables in railway and subway lines are cumbersome, difficult to assemble, and challenging to position correctly due to their complex design and circular cross-members, which complicates the adjustment of insulators.

Innovation Solution

A cantilever with a cross-member featuring anti-rotation shaped couplings and sliding mechanisms allows for precise angular positioning and longitudinal adjustment of electric cable supports without the need for special attachment means, reducing the number of components and enabling pre-assembly, using a 'U' shaped profile and skids for secure alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If traditional cantilevers with circular cross-members and multiple components are used, then structural strength is ensured, but assembly complexity and weight increase significantly

Engineering Contradiction:

Improvenumber of componentsVSAvoidstructural strength

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The patent merges multiple separate components (cross-member, support arms, insulator mounting structures) into an integrated cantilever assembly with a single main body. The cross-member features integrated attachment points and shaped couplings that combine structural support and positioning functions, reducing the total number of parts while maintaining structural integrity through unified design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cantilever cross-member is designed with multi-functional features: the shaped coupling serves both structural connection and angular positioning functions, the skids provide both guidance and adjustment capability, and the integrated design combines support, positioning, and adjustment functions into single components, reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If cantilevers are mounted on site with traditional methods, then installation flexibility is maintained, but positioning accuracy and assembly time are compromised

Engineering Contradiction:

Improvepositioning accuracyVSAvoidassembly time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The cantilever is designed with pre-integrated features including pre-positioned shaped couplings, pre-formed skid ways, and pre-configured attachment points. These features are manufactured in advance with precise geometries that enable accurate positioning during assembly without requiring complex field adjustments or specialized tools.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The shaped coupling and skid system are designed to self-align and self-position the insulators and support arms during assembly. The geometric constraints of the shaped coupling automatically guide components into correct angular positions, while the skids provide self-generating guidance paths, eliminating the need for external positioning tools or complex adjustment procedures.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If insulators are attached to circular cross-members using metal bands and hammers, then attachment simplicity is achieved, but positioning precision and worker safety are reduced

Engineering Contradiction:

Improveattachment simplicityVSAvoidinsulator positioning precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent replaces the traditional mechanical attachment method (metal bands and hammers) with a shaped coupling system that uses geometric interlocking and friction-based holding. The shaped coupling engages with the insulator support in a predefined angular position through form-fit connection, eliminating the need for impact tools while providing precise and repeatable positioning.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Stability of the object's composition

If traditional cantilever designs are used, then structural stability is maintained, but weight and assembly difficulty increase

Engineering Contradiction:

Improvestructural stabilityVSAvoidcantilever weight

Core Design Contradiction:

Stability of the object's compositionVSWeight of moving object

Solution Approach 1:

The cantilever is designed as a modular assembly with distinct functional segments (cross-member, support arms, insulator mounts) that are integrated but can be independently manufactured and assembled. This segmentation allows optimization of each component's weight while maintaining overall structural stability through the unified connection system.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8752684B2Cantilever for supporting live cables of railway, trolley and subway lines

Publication Date: 2014.06.17 GCF GENERAL COSTR FERROVIARIE SPA

AI summary

A cross arm for supporting live railway, trolley and subway lines comprising a cross-member (8) fitted with means of connection to an associable support structure (16), at least a first electric insulator (20) joined to the cross-member (8) and able to support a first live electric cable, electrically insulating it from said cross-member (8). Advantageously, the cross-member (8) comprises a body (24) having a mainly longitudinal (X-X) extension and at least a first attachment portion (28) fitted with a ‘U’ shaped profile able to form a shaped coupling with said first electric insulator (20). The first attachment portion (28) defines a first seat (32) for the continuous adjustment of the longitudinal position of the electric insulator (20) along the cross-member itself.