Modular Line Bushing Sealing Modules
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Solution Overview
Problem
Existing cable bushings have limited sealing effectiveness due to moisture and dust entering through the joints and passage openings, compromising the integrity of the interior housing environment.
Innovation Solution
The cable bushing design incorporates additional seals with rough surfaces that nestle against cables and grommets, featuring multiple contact surfaces to enhance sealing between modules and the wall, and utilizes a single self-contained seal with varying contact surfaces for improved adhesion and fit, including a groove configuration to prevent moisture bridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single seal with multiple contact surfaces is used, then sealing quality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sealing functions into a single seal element that features a first contact surface for sealing against the wall and a second contact surface for sealing between modules. This integration eliminates the need for separate seals at each interface, reducing the total number of components while maintaining comprehensive sealing coverage across all critical joints.
Solution Approach 2:
The seal is designed as a multi-functional component that simultaneously performs sealing at the wall interface and sealing between modular sections. The single seal structure incorporates both the first contact surface for radial sealing against the wall opening and the second contact surface for axial sealing between modules, making it a universal sealing solution for the entire cable bushing assembly.
2Reliability
If seals with rough surfaces are used, then adhesion and sealing are improved, but manufacturing precision requirements increase
Solution Approach 1:
The seal incorporates a rough surface specifically at the second contact surface that interfaces with the modules, while other surfaces maintain appropriate finishes for their functions. This localized application of surface roughness enhances sealing effectiveness at the critical module interface without unnecessarily complicating the manufacturing of the entire seal component.
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 significantly improves sealing quality by preventing moisture and dust ingress, ensuring a gapless fit and enhanced strain relief, thus protecting the interior of the housing from environmental contaminants.
Implementation Method 1
the seal of the cable bushing according to the invention could have a rough surface, so that the stronger adhesion also improves the sealing result
Implementation Method 2
the modules are pressed together to fix the cables. The then intermediate seals, which advantageously also have a rough surface with respect to the second contact surface, achieve a very good sealing result
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a line bushing to be mounted in an opening (1) in a wall (2) of a housing or the like, comprising at least two interconnectable modules (3, 4) that have cavities (5, 6) and at least one seal (7, 8); the cavities (5, 6) of two adjacent modules (3, 4) form passages for bushing a line, and the seal (7, 8) seals the line bushing relative to the wall (2); the line bushing improves the sealing effect for the interior of a housing or the like as a result of the fact that the modules (3, 4) are sealed relative to each other.