Two-Piece Cable Screw Connection With Integrated Elastomer Seal
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Solution Overview
Problem
Existing cable screw connections for leading cables through wall openings are complex to assemble and may not provide a reliable seal against dirt and moisture, as they require multiple parts and screw connections.
Innovation Solution
A cable screw connection comprising a two-piece housing system with a cable lead-through housing and a sealing body made of different plastics materials, where the sealing body is integrally formed on one of the housing components and deforms to create a seal when the components are connected, using a screw or clip connection to clamp the wall section and provide a circumferential contact with the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple housing parts and sealing bodies are used to form a cable screw connection, then the sealing effect against dirt and moisture is improved, but the assembly complexity increases
Solution Approach 1:
The sealing body is integrally formed on the cable lead-through housing, merging two previously separate components (housing and sealing body) into a single integrated structure. This reduces the number of parts and simplifies assembly while maintaining the sealing function against dirt and moisture
Solution Approach 2:
The invention uses different plastics materials for the cable lead-through housing and the sealing body. The housing is made of a harder plastics material while the sealing body is made of a softer thermoplastic elastomer, creating a composite material solution that provides both structural integrity and effective sealing
2Reliability
If a sealing body is pressed and deformed to create a seal, then the sealing effect is improved, but the force required for connection increases
Solution Approach 1:
The sealing body is made of a softer plastics material (thermoplastic elastomer) compared to the housing material. This parameter change in material hardness allows the sealing body to deform more easily under compression, creating an effective seal with lower connection forces
Solution Approach 2:
The sealing body is designed as a flexible component made of thermoplastic elastomer that can be deformed under compression to create a circumferential contact seal with the cable and wall opening, providing reliable sealing without requiring excessive connection force
3Reliability
If the sealing body is made of a softer plastics material, then the sealing capability is improved, but the structural strength decreases
Solution Approach 1:
The invention applies different material properties to different parts of the system: the cable lead-through housing is made of a harder plastics material for structural strength, while the sealing body is made of a softer thermoplastic elastomer for sealing capability. This local differentiation of material quality allows each component to optimize its function
Solution Approach 2:
The system uses a composite material approach with two different plastics materials: a harder structural material for the housing and a softer elastomeric material for the sealing body. This composite solution simultaneously provides both structural strength and sealing capability
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 solution simplifies assembly and ensures a reliable seal against dirt and moisture, using a thermoplastic elastomer sealing body for effective strain relief and sealing, while allowing for easy disassembly and reassembly.
Implementation Method 1
When the first and second housing components are connected, the sealing body is pressed and thus deformed in order to develop the sealing effect
Implementation Method 2
The sealing body can be made of a thermoplastic elastomer
Data Source
AI summary
The invention relates to a cable screw connection having a cable leadthrough housing which is formed in two parts from a first housing component (10) and a second housing component (11), which components are arranged, during assembly, at a wall aperture on opposite sides of the wall aperture and are releasably connected to one another in order to clamp between them a wall portion surrounding the wall aperture; a cable passage which is formed through the cable leadthrough housing when the first and second housing components (10, 11) are connected to one another; and a cable seal which is formed on the cable leadthrough housing with a sealing body (19) which is formed around the cable passage and accommodates a cable received therein in a sealing manner; wherein the cable leadthrough housing and the sealing body (19) are made of different synthetic materials and the sealing body (19) is formed.