Valve Coupling Device Fluid-Displacement Sealing Mechanism
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Solution Overview
Problem
Existing tire inflation devices suffer from a defective sealing effect between the tire valve and the elastic sealing element, leading to air leakage during attachment and removal, resulting in imprecise tire inflation and increased wear, which affects fuel efficiency, tire life, and safety.
Innovation Solution
A valve coupling device with a fluid-filled working space that uses pressure displacement to generate forces, creating a self-retaining and gas-tight fitting mechanism by moving a hollow body within the housing, which increases pressure and generates forces to clamp the valve receiving element, ensuring a secure seal without manual twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual twisting and tightening via the valve thread is used to improve the sealing effect, then the sealing effect is temporarily improved, but the device complexity increases and manual operation becomes more tedious
Solution Approach 1:
The coupling device automatically generates clamping force through a spring mechanism that engages with the valve thread. When the coupling device is attached to the valve, the spring automatically winds around the valve thread and generates radial clamping force on its own, without requiring manual twisting or tightening operations by the user.
Solution Approach 2:
The manual mechanical twisting operation is replaced by an automatic spring-based mechanical system. The spring mechanism converts axial movement during attachment into radial clamping force automatically, eliminating the need for manual twisting while maintaining reliable sealing.
2Reliability
If high manual seating or pressing force is applied to improve the sealing effect, then the sealing effect is temporarily improved, but the loss of substance increases due to air escape during attachment and removal
Solution Approach 1:
The coupling device automatically generates and maintains clamping force through its spring mechanism during both attachment and removal operations. This self-sustaining clamping force ensures continuous sealing without requiring additional manual pressing force, thereby preventing air loss during the entire operation cycle.
Solution Approach 2:
The spring mechanism dynamically adjusts the clamping force based on the engagement state with the valve thread. During attachment, the spring winds and generates increasing clamping force; during removal, the spring maintains sufficient clamping force until the coupling device is fully detached, ensuring sealing is maintained throughout the dynamic process and minimizing air loss.
3Ease of operation
If the lever plug is attached without self-retaining mechanism, then the ease of operation is improved, but the reliability deteriorates due to air leakage and imprecise tire inflation
Solution Approach 1:
The coupling device features a self-retaining mechanism where the spring automatically engages with the valve thread and generates radial clamping force without requiring manual locking or tightening operations. This self-retaining capability ensures reliable sealing while maintaining ease of operation, as the device automatically secures itself upon attachment.
Solution Approach 2:
The spring mechanism changes the clamping force parameter dynamically as it engages with the valve thread. The radial clamping force increases automatically during attachment and is maintained at an optimal level for reliable sealing, eliminating the need for manual adjustment while ensuring consistent sealing reliability.
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 device achieves a precise and efficient tire inflation with minimal air loss, maintaining a secure seal even under high internal pressures, allowing for accurate pressure measurement and extended tire life.
Implementation Method 1
fluid is displaced in a working space of the device by a user pushing in a hollow body with little effort. The displacement of the fluid volume leads to an increase in pressure in the working space
Implementation Method 2
fluid is displaced in a working space of the device by a user pushing in a hollow body with little effort
Data Source
Figure 1
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AI summary
A valve coupling device comprises a housing (110, 120), a fluid-filled working chamber (114) in the housing (110, 120), a hollow body (130), which is movably accommodated in the housing (110, 120) in the working chamber (114) and which provides a fluid-free flow channel for a gas inside the hollow body, said flow channel extending through the valve coupling device (100), and a retaining-force generating element (140), which is arranged in the working chamber (114) in operative connection with the hollow body (130). When the hollow body is moved from a first position to a second position in the working chamber (114), the hollow body (130) generates a first force (F2) acting on a wall of the housing (110, 120) in a first direction by means of the fluid, the housing (110, 120) generates a valve stressing force (FK) on a valve accommodating element (150) from the first force (F2), and, when the second position is reached, the retaining-force generating element (140) in the working chamber (114) generates a second force (F3) in a second direction, which second force retains the hollow body (130) and the retaining-force generating element in the second position.