Fluid-Filled Damper Bracket Window for Flexible Bolt Positioning
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Solution Overview
Problem
Conventional fluid-filled vibration damping devices face limitations in setting the fixing position of the mounting bracket due to the need for a fixing bolt on the bottom wall, restricting the degree of freedom in mounting, especially when the bolt needs to be arranged on the extension of the peripheral wall.
Innovation Solution
A fluid-filled vibration damping device with a mounting bracket featuring a notch window formed by outward punching from the inside to the outside at the outer peripheral corner, allowing the outer fixing bolt to be positioned within the window, and an inner fixing bolt for enhanced stability, along with a manufacturing method that prevents burrs and simplifies processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixing bolt is provided on the bottom wall of the mounting bracket, then the mounting structure can be constituted, but the degree of freedom in setting the fixing position is limited
Solution Approach 1:
The mounting bracket is divided into multiple functional parts: the bottomed tubular body, the bracket leg with mounting plate, and the notched window structure. This segmentation allows the fixing bolt to be positioned on the extension of the peripheral wall through the notched window, rather than being constrained to the bottom wall only, thereby increasing the degree of freedom in setting the fixing position.
Solution Approach 2:
The fixing position is extended from the two-dimensional bottom wall to a three-dimensional space that includes the extension of the peripheral wall. The notched window provides a passage that allows the fixing bolt to be arranged on the extension of the peripheral wall, effectively adding another dimension for position flexibility.
2Ease of manufacture
If punching is performed from the outside toward the inside, then the notch window can be formed, but burrs are generated that may damage the flexible film
Solution Approach 1:
The punching direction is inverted from the conventional outside-to-inside approach to an inside-to-outside approach. The punch penetrates from the inner surface of the mounting bracket through the peripheral wall to form the notched window. This inversion ensures that burrs are generated on the outer surface away from the flexible film, eliminating the risk of burr-induced damage while maintaining ease of manufacture.
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 flexible fixing positions for the mounting bracket, prevents damage to the flexible film, and enhances structural integrity by reducing burrs and stress concentration during manufacturing, thereby improving the mounting stability and durability of the damping device.
Implementation Method 1
a pressure receiving chamber, including a main body rubber elastomer in a wall, the main body rubber elastomer being elastically deformed upon receiving a vibration
Implementation Method 2
a fluid-filled vibration damping device which utilizes vibration damping effects of the flow action of fluid sealed inside
Data Source
AI summary
In a fluid-filled vibration damping device in which a pressure receiving chamber and an equilibrium chamber including a flexible film in a wall are communicated by a fluid passage, a bottomed tubular mounting bracket covering the flexible film includes a notch window that partially opens in a circumferential direction at an outer peripheral corner. The notch window includes an outward punched window formed by punching from the inside toward the outside in an oblique direction in a region extending across a bottom wall and a peripheral wall of the mounting bracket. A mounting plate of a bracket leg fixed to the mounting bracket enters from the outside to the inside of the mounting bracket through the outward punched window, and an outer fixing bolt for fixing to a vibration damping target member is mounted on the mounting plate and located within the outward punched window.