Multicore Cable Seal Structure with Point-Symmetric Wire Arrangement

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Solution Overview

Problem

Existing seal structures for multicore cables with non-uniformly arranged electrical wires face insufficient sealing due to uneven pressure distribution, leading to potential water or oil intrusion.

Innovation Solution

A seal structure featuring a rubber plug with a sheath fitting portion and electrical wire through-hole portion, where electrical wire groups are arranged point-symmetrically to ensure even pressure application across the sheath, enhancing the seal between the sheath and the rubber plug, and incorporating twisted pairs to reduce noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If electrical wires are arranged non-uniformly in the sheath, then the cable structure can accommodate varying wire diameters and routing requirements, but the sealing property deteriorates due to uneven pressure distribution when the rubber plug is fitted

Engineering Contradiction:

Improveadaptability to varying wire diameters and routingVSAvoidsealing property

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies asymmetry by allowing non-uniform arrangement of electrical wires within the sheath to accommodate different wire diameters and routing requirements, while the rubber plug's elastic material properties compensate for the asymmetric pressure distribution to maintain sealing effectiveness

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent changes the physical state of the sealing material by using an elastic material that can deform and adapt its shape to match the non-uniform wire arrangement, allowing the material to flow and conform to asymmetric pressure distributions while maintaining seal integrity

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a rigid sealing structure is used to ensure uniform pressure distribution, then the sealing property improves, but the ability to adapt to non-uniform wire arrangements deteriorates

Engineering Contradiction:

Improvesealing propertyVSAvoidadaptability to non-uniform wire arrangements

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent uses a flexible sealing material that can deform and adapt its shape to conform to non-uniform wire arrangements within the sheath, allowing the material to maintain sealing contact across varying geometries while accommodating different cable configurations

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

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 point-symmetric arrangement of electrical wire groups within the seal structure ensures even pressure distribution across the sheath, improving the seal integrity and reducing noise interference, effectively preventing liquid intrusion while maintaining a symmetrical arrangement of electrical wire groups.

Implementation Method 1

the sheath pressed by the rubber plug deforms inward in the radial direction of the sheath

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS10298004B2Seal structure for multicore cable, and rubber plug

Publication Date: 2019.05.21 AUTONETWORKS TECH LTD

AI summary

A seal structure for a multicore cable includes a multicore cable in which a plurality of electrical wires are enveloped by a sheath, the plurality of electrical wires extending out from an end portion of the sheath, and a rubber plug having a sheath fitting portion that is fitted around the end portion of the sheath, in which the plurality of electrical wires in a power electrical wire pair, a first signal electrical wire pair, and a second signal electrical wire pair are arranged point-symmetrically in a region in which the sheath fitting portion is fitted around the end portion of the sheath, in a cross section of the sheath that is orthogonal to a longitudinal direction of the multicore cable.