Cable Gland Snap-On Assembly with Sealing Ring
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Solution Overview
Problem
Existing cable glands lack visibility into proper assembly and sealing, making it difficult to detect assembly faults and ensuring a tight seal, and can be inadvertently loosened, compromising the seal's integrity.
Innovation Solution
A cable gland design featuring a gland body, an elastic sealing ring, and a gland ring with a snap-on connection that securely clamps the sealing ring between them, using a circular jacket and cams for a secure, undetachable assembly that predetermines the sealing ring's precompression, preventing loosening and ensuring a reliable seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling nut is used to tighten the sealing ring, then the sealing force can be adjusted, but it is not visible whether the coupling nut is sufficiently tightened and assembly faults are difficult to detect
Solution Approach 1:
The patent uses color-coded identification elements (colored rings or markings) on the coupling nut to indicate the tightening status. Different colors represent different tightening levels, making it immediately visible whether the coupling nut is sufficiently tightened without requiring disassembly or special measurement tools.
2Ease of repair
If a coupling nut is used to secure the gland ring, then the assembly can be disassembled for maintenance, but the coupling nut may be loosened by improper manipulations, affecting the tightness
Solution Approach 1:
The patent incorporates a locking mechanism that is pre-configured to automatically engage and lock the coupling nut in place after tightening. This preliminary locking action prevents any subsequent loosening due to improper manipulation, while still allowing controlled disassembly for maintenance when needed.
3Reliability
If the sealing ring is clamped between the gland body and gland ring, then a tight seal is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent divides the cable gland into modular segments (gland body, sealing ring, gland ring, and coupling nut) that can be independently manufactured and assembled. This segmentation allows for simple snap-fit or tool-less assembly operations while maintaining reliable sealing through the pre-configured clamping geometry of the modular components.
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 design provides a simple, reliable, and permanent sealing action, eliminating the risk of assembly faults and ensuring the cable gland remains securely sealed, with a quick and safe assembly process, and allows for thin-walled components and easy manufacturing.
Implementation Method 1
an elastic sealing ring that is applicable to the front side of the gland body and whose internal diameter essentially corresponds to the diameter of the cable
Data Source
AI summary
The invention relates to a cable gland. The latter comprises a gland body for feeding a cable therethrough, an elastic sealing ring that is applicable to the front side of the gland body and whose internal diameter essentially corresponds to the diameter of the cable, and a gland ring that is applicable to the sealing ring on the opposite side of the gland body and is maintained by connecting means in an assembled condition at such an axial distance from the gland body that the sealing ring is clamped between the gland ring and the gland body so that its radially inner surface is pressed against the cable. These connecting means form a snap-on connection that is closable for the assembly of the cable gland by axially pushing together the gland ring and the gland body and that connects the gland ring and the gland body undetachably in their closed condition. A preferred field of application are encapsulated sensors having an enclosure into which a connecting cable is guided through a gland body of a cable gland that passes through the enclosure wall.