Anti-Vibration Device Sealed Gas Chamber Switching
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Solution Overview
Problem
Existing anti-vibration devices require filters to prevent foreign objects and moisture from entering the switching valve, which complicates the design and increases the risk of intrusion.
Innovation Solution
The anti-vibration device configures the switching section to place the first and second gas chambers in communication, with the second gas chamber being only communicable with the first, maintaining a sealed state and suppressing foreign object and moisture intrusion without external filters, and by setting the second gas chamber's capacity greater than the first, allowing for a large change in static spring constant within limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the switching valve is configured in communication with the exterior, then the switching function can be achieved, but foreign objects or moisture may intrude into the switching valve
Solution Approach 1:
The patent introduces a communication pathway that mediates between the first gas chamber and the exterior environment. This pathway allows the switching valve to control gas flow while preventing direct exposure to foreign objects and moisture, thus resolving the contradiction between operational functionality and protection from environmental hazards.
Solution Approach 2:
The patent employs a nested structure where the first gas chamber is positioned within the cylinder body, and the communication pathway is integrated into the cylinder body structure. This nesting arrangement allows the switching valve to access the gas chamber while remaining protected from external contaminants.
2Reliability
If a filter is provided at the exterior communication portion, then foreign object intrusion is prevented, but device complexity increases
Solution Approach 1:
The patent extracts the filtering function from a separate external filter component and integrates it into the communication pathway structure itself. The pathway is designed to inherently prevent intrusion of foreign objects and moisture without requiring an additional filter element, thus maintaining reliability while reducing device complexity.
3Power
If the second gas chamber capacity is increased, then static spring constant change is enhanced, but device volume increases
Solution Approach 1:
The patent optimizes the spatial arrangement of the second gas chamber within the cylinder body by utilizing three-dimensional space efficiently. The chamber is configured to extend in multiple directions from the diaphragm, maximizing capacity while maintaining a compact overall device volume. This dimensional optimization allows enhanced spring constant change without proportionally increasing device size.
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
This configuration effectively prevents foreign objects and moisture from entering the switching section, enhancing the anti-vibration device's performance by maintaining a sealed state and allowing for a significant change in static spring constant without the need for external filters.
Implementation Method 1
when the elastic body deforms due to vibration from the engine
Implementation Method 2
the elastic body deforms due to vibration from the engine
Implementation Method 3
the diaphragm configuring the wall face of the sub liquid chamber deforms
Data Source
Figure 1
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Figure 3
AI summary
An anti-vibration device includes: a cylinder body coupled to a vibration receiver; a support body coupled to a vibration source; an elastic body that attaches the support body to the cylinder body such that the support body is capable of moving relative to the cylinder body; a first liquid chamber sectioned by an orifice pathway and the elastic body; a second liquid chamber that a liquid flows to and from the first liquid chamber through the orifice pathway; a first gas chamber with a wall configured by a diaphragm; a second gas chamber capable of communicating with the first gas chamber; and a switching section that switches a state of communication of the first gas chamber and the second gas chamber.