Partial Thread Cable Entry for Fast Installation
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Solution Overview
Problem
Existing cable/line entries require precise and time-consuming thread formation and twisting to secure into wall openings, which is inefficient, especially in hazardous areas where higher accuracy is demanded.
Innovation Solution
A cable/line entry design featuring a partially circumferential thread on the fastening section allows for easy attachment by a clamping piece that presses the contact flange against the opening edge without needing to twist the insertion sleeve into a wall thread, simplifying the installation process and reducing time expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insertion sleeve is screwed into a threaded hole in the wall opening using conventional methods, then the entry point is securely fastened, but the assembly process becomes time-consuming and requires high precision thread manufacturing
Solution Approach 1:
The thread is segmented into a partial circumferential thread rather than a complete circular thread. This segmentation allows the clamping element to be engaged and pressed against the opening edge without requiring full 360-degree rotation, significantly reducing assembly time while maintaining secure fastening through the distributed clamping force of the partial thread segments
Solution Approach 2:
Instead of using a complete circumferential thread requiring full rotation for engagement, the patent employs a partial circumferential thread that requires only partial rotation (less than 360 degrees). This partial action is sufficient to achieve the required clamping force and secure fastening, thereby reducing the time and precision required for assembly
2Reliability
If high precision threads are manufactured for secure fastening in hazardous areas, then the connection reliability is improved, but the manufacturing complexity and precision requirements increase
Solution Approach 1:
The partial circumferential thread design requires less manufacturing precision compared to a complete circular thread. Since the thread only needs to engage for a portion of the circumference, tolerances can be more relaxed while still achieving the necessary clamping force and connection reliability, thereby reducing manufacturing complexity
Solution Approach 2:
The thread structure is optimized locally by providing multiple partial thread segments around the circumference rather than one continuous thread. This local distribution of threading allows each segment to be manufactured with reduced precision while the cumulative effect of multiple segments maintains overall connection reliability
3Reliability
If the insertion sleeve requires rotation relative to the housing wall for threading, then the fastening is achieved, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The clamping element is pressed onto the insertion sleeve with only partial rotation (less than 360 degrees) to engage the partial circumferential thread. This partial rotation is sufficient to achieve secure fastening, greatly simplifying the installation process compared to conventional full-rotation threading while maintaining reliable connection
Solution Approach 2:
Instead of rotating the insertion sleeve into a pre-formed wall thread as in conventional designs, the clamping element is rotated onto the insertion sleeve to engage the partial circumferential thread. This inversion of the rotation direction and sequence simplifies installation by eliminating the need to form threads in the wall opening
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
This design enables quick and efficient installation of cable/line entries, particularly in hazardous areas, with reduced rotation effort and improved sealing, ensuring reliable strain relief and protection against loosening or loss.
Implementation Method 1
a clamping element (11) which can be attached to the fastening section (8) by pressing the mounting flange (6) against the opening edge (31)
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
The invention relates to a cable/lead insertion unit (1) for inserting and leading through at least one lead (2) into and through a wall opening (3) in a housing wall (4). An insertion sleeve is used for the insertion (5) into the wall opening (3) and a supporting flange (6) projects radially outward from the latter, at least at some points. Furthermore, a clamping part that can in particular be screwed onto the insertion sleeve (5) in the direction of the supporting flange (6) is used, as is a fixing section (8) of the insertion sleeve (5) that is arranged opposite to the clamping part (7). The fixing section (8) has on the outer side (9) thereof a partially circumferential thread (10), by means of which a clamping piece (11) for pressing on the supporting flange (6) can be brought into engagement with an opening edge (31) of the wall opening (3).