Cable Screw Connection Non-Rotatable Flange Design
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Solution Overview
Problem
Cable screw connections often fail to secure cables effectively in housings due to rotation issues, especially in angled or heavy-duty applications, and existing solutions are costly and complex to produce.
Innovation Solution
A non-rotatable cable screw connection system using a flange with a specific contour that fits into a housing shell, allowing the insert element to be locked with a locknut without rotating, eliminating the need for internal threads and enabling flexible assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cable screw connection with an externally threaded insert element is used, then the cable can be secured to the housing, but the cable rotates within the housing during the screwing operation, making it difficult or impossible to position the cable correctly
Solution Approach 1:
The cable is pre-positioned and pre-assembled with the insert element before the housing is closed. The cable and insert element are inserted through the housing opening in a predetermined position, allowing the cable to be positioned correctly before the screwing operation begins. This preliminary positioning prevents rotation issues during assembly.
Solution Approach 2:
The housing is divided into two separable half-shells that can be assembled independently. The cable and insert element are first assembled together as a separate unit, then the half-shells are joined around this pre-assembled unit. This segmentation allows the cable to be positioned correctly without being constrained by the closed housing structure during assembly.
2Ease of manufacture
If the housing is composed of two longitudinally divided half-shells with internal threads formed in the opening, then the cable screw connection can be assembled, but the formation of internal threads is complex and expensive
Solution Approach 1:
Instead of forming internal threads in the housing opening as conventionally done, the solution inverts the approach by providing external threads on the insert element that screws into the housing. The housing receives the externally threaded insert element rather than the insert element having internal threads, simplifying the manufacturing process and reducing costs.
Solution Approach 2:
The threading function is extracted from the housing structure and transferred to the insert element. Rather than requiring complex internal thread formation in the housing opening, the housing simply receives the pre-threaded insert element, eliminating the need for expensive and complex thread forming operations in the housing manufacturing process.
Data Source
AI summary
Disclosed is a cable screw connection with a cable screw connection insert for inserting into a housing opening of a housing having at least two housing shells, and for securing the cable screw connection insert to the housing. The cable screw connection insert includes an insert element which is equipped with a thread on the exterior of the housing, wherein a mating nut sits on the thread such that the cable screw connection insert can be fixed to the housing by the screw connection of the mating nut against the outer wall in the surroundings of the housing opening. The flange is equipped with a contour which corresponds to an inner contour of at least one of the housing shells in a formfitting and rotationally fixed manner.