Vibration Isolation Device with Nested Stopper Mechanism
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Solution Overview
Problem
Conventional vibration isolation devices for vehicles face challenges in effectively absorbing vibrations along the backward and forward or sideway directions due to restricted displacement, leading to high vibration transmission rates and reduced durability, and require increased dimensions to accommodate stopper mechanisms, which complicates design and functionality.
Innovation Solution
A vibration isolation device with a ring-shaped main body, a rod-like connection member, and a tubular elastic body with a cavity and stopper rubber, allowing elastic deformation and displacement control without expanding the device's axial dimension, utilizing different rubber materials for optimal vibration absorption and isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection member is elongated to reduce vibration transmission, then vibration isolation performance improves, but the device dimension along the axial direction must be expanded
Solution Approach 1:
The stopper rubber is placed inside the cavity part formed at the central part of the elastic body, with the connection member penetrating through it. This nested arrangement allows the stopper mechanism to be integrated within the existing structure without increasing the axial dimension of the device, while still providing the necessary displacement restriction to improve vibration isolation performance.
Solution Approach 2:
Instead of extending the connection member along the axial direction, the stopper mechanism is arranged radially within the cavity part of the elastic body. The stopper rubber restricts displacement in the radial direction while the connection member maintains its penetration through the elastic body, effectively utilizing the radial dimension rather than expanding the axial dimension.
2Reliability
If a stopper mechanism is added to restrict excessive displacement, then durability improves, but device complexity increases
Solution Approach 1:
The stopper mechanism is merged with the elastic body by forming a cavity part at the central part of the elastic body and placing the stopper rubber within it. The connection member penetrates through both the stopper rubber and the elastic body, integrating multiple functions into a unified structure rather than adding separate components, thereby improving durability without significantly increasing device complexity.
Solution Approach 2:
The elastic body serves multiple functions: it provides the main elastic support for vibration isolation and simultaneously houses the cavity part that contains the stopper mechanism. The connection member also serves dual purposes by being connected to both the stopper rubber and the elastic body, providing both structural support and displacement restriction functionality.
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 solution enables sufficient elongation of the connection member's axial length without increasing device size, effectively attenuating vibrations and enhancing durability by incorporating a stopper mechanism that restricts excessive displacement, thereby improving ride comfort and handling stability.
Implementation Method 1
a substantially tubular elastic body placed on the outer circumferential side of the connection member and between the first main body member and the second main body member, and elastically connecting the first main body member and the second main body member
Implementation Method 2
a stopper rubber is placed in the cavity part, and the stopper rubber is fixed to the outer circumferential side of the connection member, such that the outer circumferential surface of the stopper rubber faces the inner circumferential surface of the first main body member with a prescribed gap interposed therebetween
Data Source
AI summary
In a vibration isolation device 10, a connection rod 12 penetrates through a cavity part 104 of a rubber elastic body 44 and the inner circumferential side of a main body plate 14. In addition, a stopper rubber 98 fixed on the outer circumferential side of a rod main body 13 of the connection rod 12 is placed in the cavity part 104 of the rubber elastic body 44. This allows the rod main body 13 aligned in overlying relation with the rubber elastic body 44 along the axial direction of the connection rod 12 to be stored in the device. Thus, a stopper member 96 fixed to the rod main body 13 of the connection rod 12 can form a stopper mechanism. Therefore, while suppressing the increase in dimension along the axial direction of the device, the dimension along the axial direction of the device can be prevented from expanding by the stopper mechanism for preventing the excessive displacement along the direction orthogonal to the axis of the connection rod 12.