Cable Gland Contact Ring for Vibration-Resistant Shielding
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Solution Overview
Problem
Existing cable gland technologies fail to reliably connect and maintain high current-carrying capacity shielding, especially under strong vibrations and dynamic loads, and are prone to damage from cable movements.
Innovation Solution
A cable gland design featuring a hollow-cylindrical, electrically conductive body with a longitudinally mounted contacting ring and an annular contact groove, allowing secure mechanical decoupling and high-current contact, combined with an externally circumferential contact element and O-rings for sealing and protection, and a tightening strap for secure shielding attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple press contact is used to connect the shielding, then the assembly is simple, but the contact is too sensitive to cable movements and friction can damage the shield
Solution Approach 1:
The contact ring is designed to be longitudinally displaceable within the cable gland body, allowing it to dynamically adjust to cable movements while maintaining continuous electrical contact. This dynamic capability prevents the contact from becoming too sensitive to movements while keeping the assembly relatively simple.
Solution Approach 2:
The contact ring material and geometry are designed to change the contact pressure parameters adaptively. The contact ring can deform and adjust its contact pressure to maintain reliable electrical connection without excessive friction that would damage the shield, resolving the contradiction between simple assembly and stable contact.
2Reliability
If the shielding is firmly clamped to ensure high current-carrying capacity, then the electrical connection is reliable, but the cable becomes sensitive to vibrations and dynamic loads
Solution Approach 1:
The longitudinally displaceable contact ring provides a dynamic connection that can absorb vibrations and dynamic loads while maintaining firm electrical contact for high current-carrying capacity. This resolves the contradiction by allowing the connection to be both reliable and vibration-resistant through its ability to move and adapt.
3Reliability
If a rigid contact structure is used to maintain stable electrical contact, then the contact stability is high, but the cable gland cannot accommodate cable deflections and movements
Solution Approach 1:
The contact ring's longitudinal displacability transforms the rigid contact structure into a dynamic one that can accommodate cable deflections and movements while maintaining stable electrical contact. This principle directly resolves the contradiction between contact stability and adaptability to cable movements.
4Manufacturing precision
If the contact ring is fixed in position to ensure precise contact, then the electrical contact precision is high, but the cable gland body cannot absorb rubbing movements
Solution Approach 1:
The contact ring is designed to be longitudinally displaceable within the cable gland body, allowing it to absorb rubbing movements through controlled movement while maintaining precise electrical contact. This dynamic design resolves the contradiction between contact precision and movement absorption 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
Ensures reliable and durable electrical contact for high currents, absorbing rubbing movements and protecting against external influences while maintaining secure attachment under dynamic conditions.
Implementation Method 1
an electrically conductive, essentially hollow-cylindrical contacting ring (14), which is received by the cable gland body (11) in a contacting manner and is designed for receiving and contacting attachment of the shielding (26) of the cable
Implementation Method 2
O-rings for sealing and protection
Implementation Method 3
a tightening strap for secure shielding attachment
Implementation Method 4
allowing secure mechanical decoupling and high-current contact
Implementation Method 5
absorbing rubbing movements
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a cable gland (10) for a cable (20), comprising an outer shield (26), a cable sleeve (21) enclosing the outer shield (26) and an anti-kink grommet (22) which is injection moulded externally onto the cable sleeve (21) and has stop means for the cable gland (10). Simple and reliable contact is achieved in that the cable gland (10) a. has a substantially hollow cylindrical electrically conductive cable gland body (11) which is pushed from one side as far as the stop means over the anti-kink grommet (22) and projects over the anti-kink grommet (22) with the end opposite the stop means, b. has a union nut (12) which can be screwed on the cable gland body (11) and is pushed from the other side as far as the stop means over the anti-kink grommet (22), and c. has an electrically conductive substantially hollow cylindrical contact ring (14) which can be pushed over the cable (20) in a contacting manner into the projecting end of the cable gland body (11) and is designed for receiving and fastening the outer shielding (26) of the cable (20) with contact.