Cable Clamp with Segmented Fingers for Twist-Free Fixation
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Solution Overview
Problem
Existing cable fixation devices for connectors often cause cable twisting during assembly, leading to potential wire damage and require separate components for different cable diameters.
Innovation Solution
A device featuring a cylindrical cable holder with a clamping element that includes guide and pinch fingers, which are axially displaced using a pressure screw, preventing twisting by interacting with wedges in the holder, allowing for secure fixation of cables across various diameters without specialized parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a crown spring or sealing insert is pressed into a conical sleeve using a pressure screw, then the cable is held securely in the connector, but twisting of the crown spring or sealing insert occurs during assembly, which can lead to twisting and damage of the clamped cable
Solution Approach 1:
The clamping element is divided into multiple individual clamping fingers (at least three fingers) that are arranged radially around the cable holder. Each finger can be independently positioned and deformed, allowing the cable to be clamped without twisting. The fingers are segmented along the circumference, enabling uniform distribution of clamping force while preventing rotational stress on the cable.
Solution Approach 2:
The clamping fingers have different structural characteristics at different locations: the inner side surfaces facing the cable are designed to be smooth and cable-friendly to prevent damage, while the outer sides can engage with guide structures in the cable holder. The fingers have varying thicknesses and flexibilities, with thicker sections for structural integrity and thinner sections for controlled deformation during clamping.
2Manufacturing precision
If different crown springs or sealing inserts are used for different cable diameters, then accurate clamping for each diameter is achieved, but the device complexity and number of required parts increase
Solution Approach 1:
The clamping element is designed as a universal component that can accommodate cables of different diameters. The cable holder includes guide structures (such as grooves or surfaces) that can be positioned at different locations, allowing the same clamping element to be properly guided and clamped for various cable sizes. This eliminates the need for multiple specialized clamping elements for different cable diameters.
Solution Approach 2:
The clamping fingers are designed to be flexible and deformable under axial load. When the pressure screw is tightened, the fingers dynamically adjust their position and deformation degree based on the cable diameter, providing adaptive clamping force. This dynamic response allows a single clamping element design to handle a range of cable sizes effectively.
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
Prevents cable twisting during assembly and accommodates a range of cable diameters with a single device, ensuring secure and damage-free cable fixation.
Implementation Method 1
The thickening flattens out in the front part that is to be introduced first into the cable receptacle, as a result of which a wedge-shaped end is formed on the clamping fingers
Implementation Method 2
a pressure screw, by means of which the clamping element can be displaced axially in the cable holder
Implementation Method 3
In the rear area, the clamping fingers are attached to the ring structure via a thin, flexible bar
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The device has a clamping element (10) which is inserted into cable receptacle (2) mounted on a connector housing (1). The clamping element has guiding fingers and clamping fingers which are arranged alternatively to form ring structure (11). The fingers are axially guided in the longitudinal recess of thread. The wedge-shaped ends of clamping element are in contact with wedges of cable receptacle to reduce the diameter when the clamping element is screwed into receptacle such that cable is fixed between clamping elements.