Cable Strain Relief Using Rotating Spring Element
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Solution Overview
Problem
Existing cable fixation devices fail to provide secure twisting and tensile security without requiring special tools, and often do not effectively seal against media.
Innovation Solution
A cable fixation system comprising a clamping sleeve, a spring element, and a locking ring, where the spring element is designed as an open ring clamped between the sleeve and the locking ring, allowing its diameter to change with the locking ring's rotation, integrated with a strain relief and sealing system featuring a helical strain relief element and a disc-shaped sealing element with lamellae, providing secure cable fixation and sealing without the need for special tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a clamping band is used to clamp the cable sheath, then the cable is secured against tension, but the cable remains vulnerable to rotation and requires special tools for installation
Solution Approach 1:
The spring element is designed to automatically clamp the cable sheath when the locking ring is rotated, eliminating the need for special installation tools. The spring's elastic force is activated simply by rotating the locking ring, which moves the support contour relative to the driver contour, causing the spring to narrow and secure the cable.
2Strength
If flexible clamping tongues are pressed together to clamp the seal and cable, then the cable is secured, but the pressure may be insufficient to prevent rotation and tension
Solution Approach 1:
The spring element provides dynamic clamping force that automatically adjusts to the cable's position and tension. As the locking ring rotates and the spring narrows, it exerts increasing radial pressure on the cable sheath, ensuring sufficient force to prevent both tension and rotation without requiring excessive initial clamping pressure.
3Reliability
If the spring element diameter is changed by rotating the locking ring, then the cable fixation security is improved, but the device complexity increases
Solution Approach 1:
The locking ring serves multiple functions: it acts as a rotational adjustment mechanism to change the spring element's diameter, provides the clamping action on the cable, and simultaneously secures the entire assembly to the cable outlet. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
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 system securely fixes cables to cable outlets, offering both twisting and tensile security while sealing against media, with the ability to be easily assembled and disassembled without tools, ensuring effective strain relief and sealing.
Implementation Method 1
the spring element is designed as an open ring, the ends of which are clamped between a support contour of the clamping sleeve and a driver contour of the locking ring, and the diameter of the spring element can be changed by moving the locking ring relative to the clamping sleeve
Data Source
AI summary
The invention relates to a device for fixing a cable to a cable outlet connector (30), consisting of an adapter sleeve (2), a spring element (10) and a locking ring (20), wherein the spring element (10) is designed as an open ring, the ends (11b, 12) of which are clamped between a supporting contour (3) of the adapter sleeve (2) and a driving contour (21) of the locking ring (20), and the diameter (D) of the spring element (10) can be varied by a movement of the locking ring (20) relative to the adapter sleeve (2).