Telescoping Cylinder With Central Transmission Passage

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Solution Overview

Problem

Existing telescoping cylinder devices require separate mechanisms for various operations, contributing to bulkiness and inefficiency in industrial applications such as cranes and vehicles.

Innovation Solution

A hollow telescoping cylinder device with a central passage for transmission means, allowing for multiple functions like linear motion, rotational motion, and fluid or signal transmission, eliminating the need for external mechanisms and reducing bulkiness by integrating these functions within the cylinder structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate devices or mechanisms are added to perform additional operations, then functionality is improved, but device complexity and bulkiness increase

Engineering Contradiction:
ImprovefunctionalityVSAvoidbulkiness
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The telescoping cylinder device is designed to perform multiple functions through a single integrated structure. The hollow cylindrical configuration allows the same device to provide linear motion through telescoping action while simultaneously serving as a conduit for fluid transmission, electrical wiring, or rotational motion transmission, eliminating the need for separate mechanisms for each function

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The device employs a nested structure where inner cylinders are telescoped within outer cylinders, creating a compact multi-stage configuration. This nesting approach allows multiple functional elements to be housed within the same spatial envelope, reducing overall bulkiness while maintaining multiple operational capabilities

Inventive Principle:
Principle #7Nested doll (Nesting)

2Ease of manufacture

If transmission means are placed outside the telescoping cylinder device, then installation and maintenance are simplified, but the device becomes bulkier and transmission means are exposed to damaging factors

Engineering Contradiction:
Improveinstallation and maintenanceVSAvoidbulkiness
Core Design Contradiction:
Ease of manufactureVSVolume of moving object

Solution Approach 1:

The transmission means are merged with the telescoping cylinder structure by placing them inside the hollow cylindrical passages. This integration protects the transmission means from external damaging factors while the hollow design ensures that the transmission components do not add significant bulk to the overall device volume

Inventive Principle:
Principle #5Merging (Combining)

3Speed

If a piston is placed at the central axis of the first cylinder, then linear motion is achieved, but the central passage is blocked and transmission means cannot pass through

Engineering Contradiction:
Improvelinear motionVSAvoidcentral passage
Core Design Contradiction:
SpeedVSLength of moving object

Solution Approach 1:

The piston is relocated from the central axial position to the peripheral region between the inner and outer cylindrical walls. This dimensional relocation allows the central axis to remain open as a passage for transmission means while the piston continues to function in the peripheral space, achieving both linear motion and unobstructed central passage

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

Enables controlled length of stroke and multiple functionalities without adding bulk, allowing for efficient operation in vehicles and industrial applications by using a pressure medium to displace cylinders and transmit motions or signals through the central passage.

Implementation Method 1

a second cylinder having a cylindrical wall which is axially displaceable in said space in response to a pressure exerted by a pressure medium

Methodology Applied
Scientific EffectPressure: Pressure Increase

Data Source

PatentEP2612039B1Telescoping cylinder device and vehicle
Publication Date: 2019.08.07 EMTW PRODN AB
  • EP2612039B1 patent drawingFigure 1
  • EP2612039B1 patent drawingFigure 2
  • EP2612039B1 patent drawingFigure 3a

AI summary

The present invention relates to a telescoping cylinder device, comprising double-walled cylinders. By means of a pressure medium, the cylinders are displaceable relative to each other by moving inside the space formed between the two walls. A central through hole extends axially through the cylinders and provide a passage for transmission means. The invention also relates to a vehicle comprising a plurality of telescoping cylinder devices.