Three-Element Telescopic Rail with Traction-Driven Automation

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Solution Overview

Problem

Existing telescopic rails with power-assisted or motor-driven mechanisms are limited to two rail elements, requiring high design effort, increased installation space, and higher production costs. Additionally, they lack efficient integration of the drive into existing rail element designs.

Innovation Solution

A telescopic rail system comprising a first, second, and third rail element, where the first and second rail elements are linearly displaceable, and the third rail element is coupled to the second rail element via a traction element. This system allows for power-assisted or motor-driven pull-out or push-in movements of three or more rail elements with a minimal number of components, optimized for cost-effectiveness and reduced design space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If power-assisted or motor-driven mechanisms are integrated into telescopic rails with three or more rail elements, then automated handling capability is improved, but device complexity increases

Engineering Contradiction:

Improveautomated handling capabilityVSAvoiddevice complexity

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The drive device is designed to perform multiple functions: it directly drives the second rail element and simultaneously drives the third rail element through the traction element, eliminating the need for separate drive mechanisms for each rail element pair

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The traction element acts as an intermediary that transmits the driving force from the drive device to the third rail element, enabling indirect driving without adding complex mechanical linkages

Inventive Principle:

Principle #24Intermediary (Mediator)

2Extent of automation

If traditional drive integration methods are used in existing rail element designs, then drive functionality is achieved, but design effort and production costs increase

Engineering Contradiction:

Improvedrive functionalityVSAvoiddesign effort and production costs

Core Design Contradiction:

Extent of automationVSEase of manufacture

Solution Approach 1:

The drive system is segmented into independent modular components (drive device, traction element, guide elements) that can be manufactured separately and assembled, reducing overall design effort and production complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The traction element is guided by guide elements that are integrated into the rail element structures, creating a nested arrangement where the guide elements are contained within or attached to the rail elements, simplifying assembly

Inventive Principle:

Principle #7Nested doll (Nesting)

3Extent of automation

If complex drive integration is implemented to achieve power-assisted movement, then drive functionality is improved, but installation space increases

Engineering Contradiction:

Improvepower-assisted movement capabilityVSAvoidinstallation space

Core Design Contradiction:

Extent of automationVSArea of stationary object

Solution Approach 1:

The guide elements redirect the traction element in directions parallel to the pull-out direction, utilizing the existing linear space of the telescopic rail rather than requiring additional perpendicular installation space

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

The proposed telescopic rail system enables efficient power-assisted or motor-driven movement of three or more rail elements with a reduced component count, lower production costs, and minimal design space requirements, while ensuring seamless integration of the drive into existing rail element designs.

Implementation Method 1

rolling elements are received in the rolling element cage in order to reduce the friction between the rail elements during a pull-out movement

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS20250113918A1Telescopic rail

Publication Date: 2025.04.10 ACCURIDE INTERNATIONAL GMBH

AI summary

A telescopic rail has first, second, and third rail elements, and a drive device. The first and second rail elements are mounted together such that the first and second rail elements are linearly displaceable relative to one another in and counter to a pull-out direction. The third and second rail elements are mounted together such that the third and second rail elements are linearly displaceable relative to one another. The drive device, mounted on the first rail element, causes a linear movement of the second rail element relative to the first rail element. A traction element, fixed to the first and third rail elements, is guided on the second rail element parallel to the pull-out direction such that a displacement movement of the second rail element relative to the first rail element leads to a displacement movement of the third rail element relative to the second rail element.