Cable Fixing Device with Inner Pressure Distributor
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Solution Overview
Problem
Existing cable fixing devices often cause undesired deformations in cables, leading to impaired properties and potential damage due to high point loads, especially under torsional and bending stresses, which reduces the service life and necessitates the use of more resilient, costly cables.
Innovation Solution
A fixing device comprising an outer and inner fixing unit, where the inner unit is designed to absorb contact pressure and prevent mechanical deformation of the cable core assembly, with shaped elements that engage with the cable jacket to distribute forces evenly and prevent punctiform loads on the core assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional fixing devices are used to securely hold cables, then mechanical stability is improved, but cable deformation and damage occur due to high point loads
Solution Approach 1:
The fixing device is divided into two separate functional units: an outer fixing unit that provides mechanical stability and an inner fixing unit that distributes contact pressure. This segmentation allows each unit to perform its specific function optimally without causing harm to the cable.
Solution Approach 2:
The inner fixing unit acts as an intermediary between the outer fixing unit and the cable. It absorbs and distributes the contact pressure from the outer unit across a larger area of the cable jacket, preventing high point loads from reaching the cable cores and insulation layers.
2Stability of the object's composition
If cables are held securely under tensile forces, then fixation stability is improved, but service life is reduced due to severe stresses
Solution Approach 1:
The inner fixing unit is designed beforehand to cushion and distribute mechanical stresses before they can reach the cable cores. By providing this protective function in advance, the cable can withstand tensile forces and repeated torsional/bending loads without damage, extending its service life.
3Strength
If high point loads are applied to fix the cable, then mechanical stability is improved, but cable damage occurs due to concentrated forces
Solution Approach 1:
The fixing device segments the force application: the outer fixing unit provides fixation strength while the inner fixing unit segments and distributes the contact pressure across multiple contact points on the cable jacket, converting concentrated forces into distributed loads.
Solution Approach 2:
The inner fixing unit is specifically designed with local properties (shaped elements, surface geometry) that enable it to distribute pressure locally across the cable jacket, preventing concentrated forces from being transmitted to the cable cores while maintaining overall fixation strength.
Data Source
Figure 1~1a
Figure 2
Figure 3a~3f
AI summary
The device (1) serves to fix an electrical cable (9), particularly in the area of a cable entry (8), which has one or more conductors (92) and optionally a metallic shield (93) enclosed by a cable sheath (91). The fixing device (1) comprises an outer fixing unit (12) by means of which the cable (9) can be at least partially enclosed and a contact pressure can be exerted on the cable sheath (91) by means of which the cable (9) can be fixed. According to the invention, the outer fixing unit (12) has a passage opening (120) which serves for the passage of the cable (9) and for receiving a sleeve-shaped inner fixing unit (11) which is designed in such a way that it can be inserted between the cable sheath (91) and the conductors (92) so that it can at least partially absorb the contact pressure exerted on the cable sheath (91) by the outer fixing unit (12).