Backlash-Free Plug-In Connection With Inclined Fixing Ring
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Solution Overview
Problem
Existing plug-in connections for pipelines or hose lines experience axial backlash and wear due to relative movement of components under dynamic pressure and vibrations, leading to a shorter service life, as the securing ring abuts against the transitional corner of the recess steps and only secures properly under pressure.
Innovation Solution
Incorporating a fixing ring with an inclined contact surface between the securing ring and gasket, which self-locks when pressurized, preventing backlash in both axial and radial directions, even when unpressurized, by using a high-strength plastic fixing ring that is clamped in place by the gasket's pressure, ensuring a secure fixation without additional assembly steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stepped recess is used to accommodate the securing ring during insertion, then the pipe piece can be easily inserted, but axial backlash occurs when unpressurized leading to component wear
Solution Approach 1:
A fixing ring is introduced as an intermediary element between the securing ring and the gasket. This fixing ring engages with an inclined contact surface on the union nut to prevent axial backlash, while not interfering with the insertion process through the stepped recess. The fixing ring acts as a mediator that maintains precise axial positioning under both pressurized and unpressurized conditions.
Solution Approach 2:
The system utilizes pressure as a parameter to activate the backlash prevention mechanism. When pressurized, the medium pushes the pipe piece and securing ring axially, causing the fixing ring to engage with the inclined contact surface. This parameter-based activation allows easy insertion when unpressurized while providing backlash-free operation when pressurized.
2Device complexity
If the securing ring abuts against the transitional corner of the recess steps, then the structure remains simple, but relative movement occurs under dynamic pressure and vibrations
Solution Approach 1:
The fixing ring serves as a stabilizing intermediary that engages with the inclined contact surface to prevent relative movement between components. It maintains stable axial positioning of the pipe piece and securing ring under dynamic pressure and vibrations, while the overall structure remains relatively simple through the addition of this single element.
Solution Approach 2:
The inclined contact surface is designed to preemptively counteract axial movements caused by dynamic pressure and vibrations. By providing a pre-configured inclined surface, the system prepares the structural framework to resist harmful axial displacements before they occur, preventing component wear and maintaining stability.
3Reliability
If additional assembly steps are added to prevent backlash, then reliability improves, but ease of operation decreases
Solution Approach 1:
The fixing ring is integrated into the existing assembly sequence, combining the backlash prevention function with the standard insertion process. The fixing ring is positioned and engaged in the same operational flow as the securing ring installation, eliminating the need for separate assembly steps while ensuring reliable backlash-free operation.
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 provides a backlash-free, wear-reducing fixation that maintains the pipe piece in a locked position without relative movement, enhancing the service life by preventing axial and radial movement of components under varying pressures and vibrations.
Implementation Method 1
the pipe piece can be transferred by pressurizing the medium from its inserted position against the insertion direction relative to the threaded-connection body
Implementation Method 2
a contact surface formed on the threaded-connection body and/or union nut and inclined with an axial progression in the direction of the securing ring relative to the longitudinal axis of the pipe piece
Data Source
AI summary
A backlash-free plug-in connection for a pipe or hose line includes a threaded-connection body, a union nut, a pipe piece insertable into the threaded-connection body, and a securing ring supported against the pipe piece. Stepped recesses are provided for holding the securing ring. A gasket seals the pipe piece against the threaded-connection body. By pressurizing a medium flowing through the pipe or hose line, the pipe piece moves from an inserted position against an insertion direction to a locked position. A fixing ring abuts the securing ring and the gasket, and is supported between the pipe piece and a contact surface formed on the threaded-connection body or union nut. The contact surface is inclined and the gasket moves the fixing ring to a fixed position when the pipe piece moves to the locked position so that the pipe piece is fixed in place.