Ventilation Hose Pin Locking in a Cylindrical End Segment
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Solution Overview
Problem
Current air ventilation hose installation methods are unstable, as hoses are not securely locked in end segments, leading to detachment under tension, and existing solutions are not suitable for permanent mounting due to reliability issues.
Innovation Solution
An installation mechanism using an installing pin and guide channel within the cylindrical end segment of the hose, allowing the hose to be securely fixed without irreversible damage, while allowing rotation for ease of installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the hose is only seated by sealing it into the cylindrical end, then the installation is simple, but the hose is not locked and the assembly is unstable
Solution Approach 1:
A pin is introduced as an intermediary element to connect the hose to the end segment. The pin passes through the hose wall and engages with the end segment, providing a reliable mechanical connection while maintaining installation simplicity. The pin acts as a mediator that transforms the simple sealing connection into a stable locked connection.
Solution Approach 2:
The connection system is divided into separate functional elements: the sealing element that provides the initial seal, and the pin that provides the locking function. This segmentation allows each element to perform its specific function optimally - the seal ensures airtight connection while the pin prevents detachment.
2Reliability
If screws are drilled against each other into the end segment to anchor the hose, then the hose is fixed, but the screws are pulled out under tension and the hose comes loose
Solution Approach 1:
The pin serves as a superior intermediary element compared to screws. It distributes the mechanical load across a larger surface area of the hose wall and engages with the end segment in a way that prevents pull-out under tension, eliminating the weakness of screw-based fixation.
3Reliability
If a locking pin with a recess is used to fix the hose in one position, then the hose is locked, but the pin can twist itself and release the hose
Solution Approach 1:
The pin design incorporates asymmetric features including a head at one end and a pointed tip at the other, creating a non-rotatable configuration. The pin engages with the end segment in a specific orientation that prevents twisting and self-release, ensuring stable locking in the desired position.
Solution Approach 2:
The pin is pre-configured with a head and tip geometry that determines its insertion direction and locking orientation. This preliminary design ensures that when inserted, the pin automatically assumes the correct locking position and cannot twist to release, providing stable fixation.
4Reliability
If the installing pin passes through the guide channel and between the ribs, then the hose is securely fixed, but the hose cannot rotate during installation
Solution Approach 1:
The system transitions from a static guide channel to a dynamic installation process. The guide channel provides initial guidance and constraint during insertion, but once the pin passes through and the hose is secured, the hose gains rotational freedom. The guide channel's constraint function is temporary, serving only during the installation phase.
Data Source
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AI summary
The installation mechanism comprising at least a installation pin and a guide channel located in the wall of the cylindrical end part of the end segment into which the air ventilation hose is inserted. An installation pin is inserted into the guide channel. Thus, the inserted air ventilation hose in the cylindrical end segment is secured against re-ejection in one position, but at the same time it is rotatable in the cylindrical end segment.