Dual Stopper Vibration Isolation Device Load Distribution
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Solution Overview
Problem
Conventional vibration isolation devices face durability issues due to excessive load on the stopper elastic body, which restricts their ability to maintain effectiveness over time.
Innovation Solution
The vibration isolation device incorporates two stopper elastic bodies with different distances between their surfaces and a hollow portion for the first stopper elastic body, allowing for distributed load absorption and reduced spring constant fluctuations, enhancing durability by sharing the load between the first and second stopper elastic bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single stopper elastic body is used to restrict relative movement between mounting members, then the device structure is simple, but the stopper elastic body bears excessive load resulting in poor durability
Solution Approach 1:
The single stopper elastic body is divided into two separate stopper elastic bodies (first and second). Each stopper elastic body has its own stopper surface and is disposed at different positions. This segmentation distributes the load that previously fell entirely on one body, reducing the burden on each individual stopper elastic body and improving overall durability.
Solution Approach 2:
The two stopper elastic bodies are positioned at different locations with different distances from their respective opposing surfaces. The first stopper elastic body is positioned closer to its opposing surface than the second stopper elastic body is to its opposing surface. This creates local differences in load distribution characteristics, allowing each stopper to handle loads optimally based on its position.
2Force
If the stopper elastic body is positioned close to the opposing surface for effective load bearing, then the load bearing capability is improved, but the spring constant increases suddenly reducing durability
Solution Approach 1:
The load bearing function is segmented between two stopper elastic bodies at different positions. The first stopper elastic body positioned closer to its opposing surface handles loads more effectively, while the second stopper elastic body positioned farther away provides additional support. This segmentation prevents sudden spring constant increases by distributing the progressive loading across two elements.
Solution Approach 2:
The second stopper elastic body is positioned farther from its opposing surface, creating a larger initial gap. This acts as a cushioning mechanism that engages before the first stopper elastic body reaches its limit, providing progressive load absorption and preventing sudden force spikes that would reduce durability.
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 improves durability by distributing the load and reducing sudden increases in spring constant, ensuring reliable vibration absorption across varying loads, thereby extending the device's operational lifespan.
Implementation Method 1
an elastic body that is disposed between the mounting members
Implementation Method 2
the stopper surface of the stopper elastic body comes into contact with the opposing surface opposing that stopper surface, and relative movement between the mounting members is restricted
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A vibration isolation device (10) includes a first mounting member (11) connected to one of a vibration generating portion and a vibration receiving portion, and a second mounting member (12) connected to the other; an elastic body (13) disposed between the mounting members (11, 12); a first stopper elastic body (27) having a first stopper surface (26) which is disposed on either one of opposing surfaces (24, 25) that oppose each other, respectively on the first mounting member (11) and the second mounting member (12), and which faces the other surface such as to be capable of coming into contact therewith; and a second stopper elastic body (29) having a second stopper surface (28) which is disposed on either one of the opposing surfaces (24, 25), respectively on the first mounting member (11) and the second mounting member (12), and which faces the other surface such as to be capable of coming into contact therewith. The distance between the first stopper surface (26) and the opposing surface (24) facing the first stopper surface (26) is smaller than the distance between the second stopper surface (28) and the opposing surface (24) facing the second stopper surface (28).