Fluid-Filled Vibration Damping Device Rubber Buffer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluid-filled vibration damping devices with liquid pressure transmission mechanisms experience striking noise due to movable member contact with the housing surface, which affects vibration damping performance and durability.
Innovation Solution
Incorporating a rubber buffer on the inner surfaces of the housing space to reduce impact force and prevent striking noise by limiting deformation and displacement of the movable member, and using elastic projections and grasping projections to enhance vibration damping through elastic deformation and energy attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable member is allowed to move freely in the housing space, then the vibration damping effect is improved, but the movable member contacts the housing surface causing striking noise
Solution Approach 1:
A rubber buffer is introduced as an intermediary element between the movable member and the housing surface. The rubber buffer absorbs impact energy through elastic deformation when the movable member contacts the housing, preventing direct hard contact and eliminating striking noise while allowing the movable member to maintain its vibration damping function
Solution Approach 2:
The rubber buffer is pre-installed at the contact location between the movable member and housing surface to provide cushioning before impact occurs. This beforehand cushioning prepares the system to absorb impact energy through elastic deformation, preventing the harmful striking noise from generating in the first place
2Force
If the movable member contacts the housing surface, then the impact force is transmitted to the partition member, but this causes striking noise and reduces durability
Solution Approach 1:
The rubber buffer serves as a mediator between the movable member and housing surface, intercepting the impact force and transforming it into elastic deformation energy. This prevents the direct transmission of high-impact forces to the partition member and housing structure, reducing wear and improving durability
3Object-affected harmful factors
If the movable member is constrained to prevent contact, then striking noise is reduced, but the vibration damping performance decreases
Solution Approach 1:
The rubber buffer is strategically placed only at specific contact locations where the movable member may contact the housing surface, rather than constraining the entire movable member. This localized cushioning approach allows the movable member to maintain its freedom of movement for vibration damping while preventing contact only where necessary to eliminate striking noise
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
Effectively reduces striking noise and maintains vibration damping performance while ensuring durability by minimizing direct contact and allowing controlled deformation of the movable member within the fluid-filled vibration damping device.
Implementation Method 1
a rubber buffer arranged on wall inner surfaces of the housing space to be struck by the movable member, wherein the movable member is grasped partially in a thickness direction between the wall inner surfaces of the housing space via the rubber buffer
Implementation Method 2
the liquid pressure of the pressure-receiving chamber and the liquid pressure of the equilibrium chamber are applied to both surfaces of the movable member through a communicating hole (fluid flow path) formed by piercing through a wall part of a housing space
Implementation Method 3
the pressure-receiving chamber and the equilibrium chamber are in communication with each other through an orifice passage, and the target vibration damping effect is exhibited based on the fluid flow action of the fluid that flows through the orifice passage
Data Source
AI summary
A fluid-filled vibration damping device including: first and second mounting members elastically connected by a main rubber elastic body; a partition member supported by the second mounting member; a pressure-receiving chamber and an equilibrium chamber disposed on either side of the partition member; a housing space formed within the partition member; a plate-shaped movable member arranged in the housing space with liquid pressures of the pressure-receiving chamber and the equilibrium chamber applied to the respective faces of the movable member; and a rubber buffer arranged on wall inner surfaces of the housing space to be struck by the movable member. The movable member is grasped partially in a thickness direction between the wall inner surfaces of the housing space via the rubber buffer at surfaces facing the wall inner surfaces of the housing space.