Vibration Absorber Inverting Mount to Avoid Tensile Stress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration absorption devices for vehicles, such as engine mounts, face durability issues when subjected to tensile deformation under engine load, compromising their ability to effectively damp vibrations in two directions.
Innovation Solution
A vibration absorption device featuring a tubular first mounting member, a second mounting member, first and second elastic bodies, pressure receiving chambers filled with liquid, and restriction channels that allow liquid movement between chambers, optimizing elastic deformation and internal friction to absorb vibrations while maintaining durability by reversing the joining configuration under load, thus avoiding tensile deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the first elastic body is subjected to tensile deformation under engine load, then the vibration absorption device can maintain its structure, but the durability of the first elastic body deteriorates
Solution Approach 1:
The patent inverts the conventional joining configuration by positioning the inner side joining portion (joining to second mounting member) at the opposite direction to the loading direction relative to the outer side joining portion (joining to first mounting member). This inversion transforms the stress state from tensile to compressive under engine load, thereby improving durability while maintaining structural stability
2Reliability
If liquid moves between pressure receiving chambers and secondary chamber through restriction channels, then vibrations in two directions are damped, but the device complexity increases
Solution Approach 1:
The secondary chamber serves multiple functions: it acts as a common liquid reservoir for both pressure receiving chambers, provides vibration damping in two directions through controlled liquid movement, and simplifies the overall structure by eliminating the need for separate damping mechanisms for each direction. The restriction channels enable universal liquid flow control for both chambers through a single shared space
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 effectively dampens vibrations in two directions while enhancing durability by utilizing liquid movement and elastic deformation to absorb input vibrations and reducing stress concentrations through a configuration that reverses the joining orientation under load, improving the overall durability and performance.
Implementation Method 1
internal volumes of the pressure receiving chambers changing in accordance with elastic deformations of the first elastic body
Implementation Method 2
Vibrations in two directions may be damped by liquid moving between the first cavity portion and the second cavity portion
Implementation Method 3
a first restriction channel that enables movements of liquid between the primary chamber and the secondary chamber; and a second restriction channel that enables movements of liquid between each of the pressure receiving chambers and the secondary chamber
Data Source
AI summary
A vibration absorption that is both capable of damping vibrations in two directions and high in durability. A pair of pressure receiving chambers (102A) and (102B) at symmetrical positions sandwiching an axis S are structured between a first rubber elastic body (24) and a second rubber elastic body (38). The shape of a first rubber elastic body (18) in an unloaded state is determined such that a region between an inner side joining portion (24B) and an outer side joining portion (24A) becomes substantially horizontal in a loaded state in which the first rubber elastic body (24) supports the weight of an engine.