Cable Connection With Internal Thread And Smooth Cap Nut

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing cable and hose fittings struggle to securely seal cables or hoses of varying diameters while preventing dirt and deposit accumulation on the external thread of the socket, which is particularly problematic in clean industries like pharmaceutical and food sectors.

Innovation Solution

The sliding element is designed separately from the clamping element with an inclined conical surface, allowing the pressure element to rotate relative to the socket without displacing it axially, converting rotational movement into longitudinal movement within the screw connection to apply radial force on the cable or hose, and incorporating a cap nut with a smooth outer surface and nano-coating to minimize contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the pressure element is screwed onto the socket with an external thread, then the clamping element and sealing element can be pressed radially inwards to securely hold cables or hoses of different diameters, but dirt and deposits can settle on the external thread of the socket

Engineering Contradiction:

Improvesecure holding of cable or hoseVSAvoiddirt and deposit accumulation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The external thread is extracted from the socket and transferred to the pressure element. The socket is designed with an internally threaded recess that receives the externally threaded pressure element, eliminating the external thread from the socket's outer surface where dirt could accumulate.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The threading arrangement is inverted: instead of the socket having an external thread, the socket now has an internal threaded recess, and the pressure element has the external thread. This inversion moves the threaded interface inside the socket structure, preventing dirt accumulation on external surfaces.

Inventive Principle:

Principle #13The other way round (Inversion)

2Object-affected harmful factors

If the pressure element is designed to completely cover the socket thread when screwed on, then dirt accumulation is prevented, but the pressure element cannot be screwed on sufficiently to allow the clamping element and sealing element to fit tightly on the cable or hose

Engineering Contradiction:

Improvedirt accumulation preventionVSAvoidtight fit of clamping and sealing elements

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The threading interface is moved from the external dimension to an internal dimension. The internal threaded recess in the socket and external thread on the pressure element create a threaded connection that occurs within the socket's structure rather than on its external surface, allowing complete coverage while maintaining threading functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Stability of the object's composition

If the pressure element is fixed to the connecting piece to prevent axial displacement, then rotation about the longitudinal axis is prevented, but rotation of the cable around the longitudinal axis becomes difficult

Engineering Contradiction:

Improveaxial position stabilityVSAvoidcable rotation capability

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The connection between the pressure element and connecting piece is segmented into two independent degrees of freedom: axial displacement is prevented through the threaded engagement with the sliding element, while rotational movement about the longitudinal axis remains permitted. This segmentation allows the pressure element to maintain axial stability while enabling cable rotation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection between the pressure element and connecting piece is designed to be dynamically selective: it constrains axial movement through the threaded mechanism while allowing rotational freedom. This dynamic design enables the system to maintain stability in one dimension while providing flexibility in another.

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

This design ensures even radial force application, prevents dirt accumulation, and maintains high hygiene standards by relocating the clamping mechanism inside the screw connection, making the outer surface smooth and easy to clean, while providing effective sealing and protection against moisture and contaminants.

Implementation Method 1

a surface of the sliding element directed in the direction of the clamping element is formed as an inclined, conical sliding surface

Methodology Applied

Scientific EffectMechanical advantage through inclined plane: Inclined Plane

Data Source

PatentEP1898506B1Cable or tube connection

Publication Date: 2011.10.19 BIMED TEKNIK A S ISTANBUL

Figure 1~2
Figure 3

AI summary

The cable or tube connection (1) has a hollow-cylindrical connecting piece (2), which is connected with a housing, The pressure element (9) effects on a cable or on a tube passed through the connection, by rotating relative to the connecting piece on the clamping element (15,16) and the sealing element (18) for fitting the clamping element and the sealing element. The pressure element is connected with the connecting piece toward the longitudinal axis (13) of the connecting piece in a firm, also non-changeable reference to the connecting piece by rotating relative to the connecting piece.