Actuating Cylinder Rod Sensor Wiring via Telescopic Linkage

Solution Overview

Problem

Existing actuating cylinders with electric motors and worm-and-nut mechanisms lack effective integration of sensors and secure, flexible wiring solutions for transmitting pressure and position data, particularly in environments where mechanical movement and rotation are involved.

Innovation Solution

The integration of a pressure sensor on the cylinder rod with a longitudinally deformable linking mechanism and a coiled electric connecting wire within a variable length channel, secured by telescopic tubes and annular seals, allows for secure transmission of electrical signals during longitudinal movement while avoiding contact with rotating parts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a sensor is integrated on the cylinder rod to measure pressure and position, then measurement precision is improved, but the complexity of wiring and electrical connection increases

Engineering Contradiction:

Improvepressure and position measurementVSAvoidwiring and electrical connection

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The electric connecting wire is nested within the telescopic linking means, specifically housed inside the tubular wall structure. The wire is routed through the hollow interior of the telescopic tubes, protecting it from external mechanical stress while maintaining electrical connectivity between the sensor on the rod and the control system.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The telescopic linking means with tubular walls acts as a flexible protective sheath for the electric connecting wire. The telescopic structure allows the tube to expand and contract with rod movement, accommodating wire length changes while protecting the wire from mechanical damage and rotation.

Inventive Principle:

Principle #30Flexible shells and thin films

2Ease of operation

If the electric connecting wire is made flexible to accommodate rod movement, then ease of operation is improved, but the wire becomes vulnerable to mechanical stress and rotation

Engineering Contradiction:

Improverod movement accommodationVSAvoidwire protection from mechanical stress

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The electric connecting wire is nested within the telescopic linking means, specifically housed inside the tubular wall structure. The wire is routed through the hollow interior of the telescopic tubes, protecting it from external mechanical stress while maintaining electrical connectivity between the sensor on the rod and the control system.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The telescopic linking means is designed to dynamically adjust its length during rod movement. The telescopic tubes expand and contract to accommodate the changing distance between the rod and cylinder body, allowing the wire to remain taut without excessive tension while protecting it from lateral mechanical stress and rotation.

Inventive Principle:

Principle #15Dynamics

3Stability of the object's composition

If the linking means is made rigid to ensure structural stability, then stability of the object's composition is improved, but the ability to accommodate longitudinal movement decreases

Engineering Contradiction:

Improvestructural stabilityVSAvoidlongitudinal movement accommodation

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The telescopic linking means is designed to dynamically adjust its length during rod movement. The telescopic tubes expand and contract to accommodate the changing distance between the rod and cylinder body, allowing the wire to remain taut without excessive tension while protecting it from lateral mechanical stress and rotation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The linking means is segmented into multiple telescopic tubular sections that can extend and retract relative to each other. This segmentation allows the structure to maintain rigidity in the radial direction (providing structural stability) while accommodating longitudinal movement through the telescopic action of the segmented tubes.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS7856900B2Actuating cylinder with sensor associated with its rod

Publication Date: 2010.12.28 EWELLIX AB

AI summary

Actuating cylinder including a longitudinal cylinder body, a longitudinal cylinder rod traversing a front transverse wall of the cylinder body and a longitudinal means of operating the cylinder rod relative to the cylinder body, the cylinder body including a rear transverse wall situated at a distance from a rear end of the cylinder rod inside the body. The cylinder includes a sensor supported by a front end portion of the cylinder rod; longitudinally deformable linking means to delimit a longitudinal channel of variable length coupling the front end portion of the cylinder rod and the rear transverse wall of the cylinder body and emerging at the rear of this rear transverse wall; and at least one electric connecting wire which is connected to the sensor, which extends in the longitudinal channel and which emerges via the rear end of this longitudinal channel.