Pipe Splitter Cable Locking Assembly for Quick Release

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Solution Overview

Problem

Existing pipe bursting methods face difficulties in decoupling the cable from the pipe splitter due to the strong coupling caused by pulling forces, making it challenging to disengage the cable from the pipe splitting assembly.

Innovation Solution

A cable locking assembly with a cable gripping device and a jack mechanism that provides a mechanical advantage coupling, allowing for easy disengagement of the cable from the cable gripping device collar by applying a force input that is multiplied through a mechanical advantage coupling, enabling quick release without the need for heavy equipment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the cable is tightly coupled with the pipe splitter during pulling operation, then the reliability of force transmission is improved, but the ease of operation for decoupling the cable deteriorates

Engineering Contradiction:

Improvereliability of force transmissionVSAvoidease of decoupling cable

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cable gripping device transitions from a static tight coupling state during pulling to a dynamic release state through the jack mechanism. The device can adapt its gripping force - maintaining strong coupling during operation and enabling easy release afterward, resolving the contradiction between reliable force transmission and ease of decoupling.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The jack mechanism acts as an intermediary device between the operator and the cable gripping device. By inserting the jack and applying force, the operator can overcome the tight coupling forces without needing excessive direct force, making the decoupling process easier while maintaining reliable coupling during operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a simple cable holding mechanism is used, then the device complexity is reduced, but the reliability of immobilizing the pipe splitting assembly deteriorates

Engineering Contradiction:

Improvecomplexity of cable holding mechanismVSAvoidreliability of immobilizing pipe splitting assembly

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The cable gripping device is nested within the pipe splitting assembly, with the jack mechanism integrated into the same structure. This nested arrangement allows for a reliable immobilization system without adding significant external complexity, as components are contained within the existing assembly structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The cable gripping device uses the pulling force itself to enhance its gripping action on the cable. As the motorized spool pulls the cable, the tension automatically tightens the cable gripping device's hold on the cable, providing self-reinforcing immobilization without requiring additional complex active control mechanisms.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If excessive force is applied to decouple the cable, then the ease of operation for release is improved, but the risk of damaging components increases

Engineering Contradiction:

Improveease of cable releaseVSAvoidrisk of component damage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The jack serves as a force-multiplying intermediary that allows operators to release the cable grip without applying excessive direct force. The mechanical advantage provided by the jack enables controlled release forces that are sufficient to overcome the tight coupling but low enough to prevent damage to the cable or gripping device components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The release process is made dynamic and controlled through the jack mechanism rather than requiring static excessive force. The jack allows progressive application of release force, enabling the operator to control the decoupling process and stop if resistance is encountered, thereby preventing damage while maintaining ease of operation.

Inventive Principle:

Principle #15Dynamics

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 reliable immobilization of the pipe splitting assembly during operation while allowing for quick and easy disassembly of the pipe splitting assembly from the cable, reducing the need for power tools and simplifying the process of decoupling the cable from the pipe splitter.

Implementation Method 1

Methodology Applied

Scientific EffectMechanical advantage: Mechanical Advantage

Data Source

PatentUS11448353B2Method and device for holding and releasing a cable in a pipe splitter

Publication Date: 2022.09.20 TT TECHNOLOGY INC

AI summary

A cable retention and release mechanism includes a cable gripping device including a cable passage. A cable extends through the cable passage. A cable gripping device collar is movably coupled around the cable gripping device. An outer cable gripping device surface is seated against a cable gripping device receiving inner surface preventing movement of the cable gripping device relative to the cable gripping device collar. The cable gripping device receiving inner surface clamps the cable gripping device on the cable and prevents sliding movement of the cable. A jack is movably coupled with the cable gripping device collar. In a first engaged position the jack is engaged against the cable gripping device proximal end. In a second engaged position the jack unseats the outer cable gripping device surface from the cable gripping device receiving inner surface and releases the clamping of the cable.