U-Shaped Cable Strain Relief for High-Force Electrical Assemblies
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Solution Overview
Problem
Existing electrical assemblies lack an effective strain relief mechanism to absorb and manage high forces without compromising the connection between cables and electrical components.
Innovation Solution
An electrical assembly with a u-shaped cable strain relief element featuring spaced clamp sections and ribs that enhance clamping, allowing for perpendicular mounting and absorption of forces, using an electrically isolating material like plastic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional strain relief element is used, then the cable connection is secured, but it cannot compensate for high forces without damaging the cable or electrical component
Solution Approach 1:
The strain relief element is divided into multiple functional sections: a base section for mounting, clamp sections for gripping the cable, and ribs for enhanced clamping. This segmentation allows each part to perform its specific function optimally, distributing the mechanical stress across multiple contact points rather than concentrating it at a single location, thereby enabling high force compensation while maintaining connection integrity.
Solution Approach 2:
The clamp sections are equipped with ribs that extend into the clamping space and protrude into the cable sheath. This local enhancement of clamping quality at critical contact points increases the friction and mechanical interlocking between the strain relief element and the cable, allowing the element to withstand higher forces without compromising the overall connection reliability.
2Strength
If the clamp sections are positioned close together, then the clamping space is small and easy to install, but the clamping effect is insufficient for high forces
Solution Approach 1:
Instead of increasing the distance between clamp sections along the cable axis, the invention adds ribs that extend radially into the cable sheath. This dimensional change from linear spacing to radial protrusion significantly enhances the clamping effect without increasing the overall size of the clamping space, allowing strong clamping while maintaining compact installation dimensions.
3Force
If the strain relief element is mounted parallel to the cable axis, then the mounting is simple, but it cannot effectively absorb forces acting on the cable
Solution Approach 1:
The strain relief element features an asymmetric U-shaped configuration with a base section and two clamp sections arranged to create a reception area. This asymmetric design naturally guides the cable into the clamping space and allows the element to be mounted perpendicular to the cable axis, optimizing force absorption in the direction of cable tension while maintaining ease of installation through the self-aligning geometry.
Data Source
AI summary
Electrical assembly having a housing with an interior space, an electrical component that is arranged at least partly in the interior space, at least one cable having at least one wire to be electrically connected to the electrical component and an electrically isolating cable sheath encompassing the at least one wire, and at least one cable strain relief element. The at least one cable strain relief element is of u-shaped configuration with at least one base section from which two clamp sections extend, which clamp sections are arranged spaced apart from each other such that a clamping space is provided. The cable extends through the clamping space between the two clamp sections. At least one of the clamp sections is provided with at least one rib extending into the clamping space and protruding in the cable sheath.