Breather Device Pressure Relief Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing breather devices fail to discharge air from a case when the internal pressure is low, as the blocking mechanism requires a combined force exceeding the self-weight and spring bias, preventing effective air release.
Innovation Solution
A breather device with a cylindrical body, stopper, and spherical blocking body that allows air discharge when internal pressure exceeds a predetermined value, allowing the blocking body to move upward and unblock the communicating hole, enabling air release at lower pressures while preventing external air from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring applies downward bias force to the spherical body to block the communicating hole, then outside air or foreign matter is prevented from entering the case, but air cannot be discharged when the pressure inside the case is low
Solution Approach 1:
The invention extracts the spring component that applies downward bias force from the system. By removing this component, the blocking body is no longer subjected to additional downward force, allowing it to be lifted by smaller pressure differentials. This enables air discharge at lower internal pressures while maintaining the blocking function through the weight of the blocking body alone.
2Reliability
If the blocking body is held down by self-weight and spring bias force, then the communicating hole remains blocked at low pressure, but air discharge is prevented when pressure is low
Solution Approach 1:
The invention converts the blocking body's self-weight, which previously worked against air discharge by adding to the downward force, into a beneficial feature. By removing the spring, the self-weight becomes the sole retaining force, which is sufficient to block the hole at low pressure but can be overcome by smaller pressure differentials, thus lowering the pressure threshold for discharge.
3Reliability
If a spring is used to apply bias force to the spherical body, then the blocking mechanism is more reliable, but the device complexity increases
Solution Approach 1:
The invention removes the spring component from the blocking mechanism, reducing the number of parts and simplifying the device structure. The blocking function is maintained through the weight of the blocking body alone, which eliminates the need for additional elastic components while still providing reliable blocking at low pressures.
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
Enables air discharge at lower internal pressures, stabilizes shift response performance, and reduces oil flow loss by allowing quick air release and controlled oil flow management.
Implementation Method 1
the blocking body may be a spherical body having a larger diameter than the communicating hole. The blocking body may be configured to block the communicating hole when the blocking body sinks along the inclined portion.
Implementation Method 2
the communicating hole ceases to be blocked when a pressure inside the case exceeds a first predetermined value, and the blocking body moves upward in the vertical direction in the space.
Data Source
AI summary
A breather device that communicates an inside of a case with an outside of the case in a vertical direction includes a cylindrical body having a hollow portion that extends in the vertical direction, a stopper inserted in the hollow portion, and a blocking body that is located in a space defined by the stopper in the hollow portion, and blocks a communicating hole provided in a lower part of the cylindrical body as viewed in the vertical direction. The communicating hole ceases to be blocked when the pressure inside the case exceeds a first predetermined value, and the blocking body moves upward in the vertical direction in the space.