Vibration-Proofing Device Displacement Regulation
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Solution Overview
Problem
Conventional vibration-proofing devices, such as engine mounts, face high manufacturing costs and complex processes due to the need for rigid members and flanges, which complicate the molding of elastic bodies and increase the spring constant abruptly.
Innovation Solution
A vibration-proofing device with a cylindrical shape, featuring an elastic body with convex portions that abut a displacement regulating member, eliminating the need for a rigid member connected to the second member, thus allowing cost-effective regulation of displacement without forming a flange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flange is formed on the inner cylinder fitting to support the rebound stopper mechanism, then the displacement of the elastic body can be regulated, but the manufacturing cost increases and the molding process becomes complicated
Solution Approach 1:
The invention extracts the displacement regulation function from the rigid flange structure and transfers it to the elastic body itself through the rebound stopper mechanism. The elastic body is directly molded with the rebound stopper structure, eliminating the need for a separate flange component on the inner cylinder fitting. This allows the elastic body to perform both its primary vibration isolation function and the secondary displacement regulation function, thereby simplifying the molding process while maintaining displacement regulation capability.
2Reliability
If a rigid member is used to regulate displacement, then the displacement can be controlled, but the spring constant increases abruptly and the device complexity increases
Solution Approach 1:
The invention merges the displacement regulation function with the elastic body structure by directly molding the rebound stopper mechanism into the elastic body. This integration eliminates the need for separate rigid members and flanges, reducing device complexity while maintaining effective displacement control. The elastic body with integrated rebound stopper performs both vibration isolation and displacement regulation in a unified structure.
3Reliability
If a flange is added to the inner cylinder fitting, then the rebound stopper can be supported, but the manufacturing cost of the inner cylinder fitting increases
Solution Approach 1:
The elastic body is designed to be self-sufficient by directly molding the rebound stopper structure into it. This allows the elastic body to support its own rebound stopper mechanism without requiring additional structural elements like flanges on the inner cylinder fitting. The elastic body serves both its primary function of vibration isolation and the secondary function of supporting the rebound stopper, thereby eliminating the need for costly modifications to the inner cylinder fitting.
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 allows for the regulation of elastic body displacement at a lower cost, preventing abrupt increases in spring constant and simplifying the manufacturing process by eliminating the need for a rigid member, while maintaining durability and effective vibration damping.
Implementation Method 1
an elastic body which elastically connects the inner cylinder fitting and the outer cylinder fitting
Implementation Method 2
a vibration-proofing device including a first member connected to a vibration receiving portion and formed in a substantially cylindrical shape, a second member connected to a vibration generating portion and disposed on the inner peripheral side of the first member, an elastic body which elastically connects the first member and the second member, a plurality of liquid chambers disposed around the central axis of the second member
Data Source
AI summary
This vibration-proofing device is a vibration-proofing device 12 including an elastic body 28 which elastically connects an intermediate cylinder fitting 130 and an inner cylinder fitting 20, a first liquid chamber 161 and a second liquid chamber 162 disposed around the central axis of the inner cylinder fitting 20, and a partition wall 29 made of the elastic body 28, which is disposed between the adjacent liquid chambers 161 and 162. The initial load is input in a +Z-direction substantially parallel to the central axis of the intermediate cylinder fitting 130. When the inner cylinder fitting 20 has been displaced in the −Z-direction, a displacement regulating member 71 which abuts a formation area of the partition wall 29 in the elastic body 28 to regulate the displacement of the elastic body 28 is connected to the intermediate cylinder fitting 130. It is thus possible to regulate the displacement of the elastic body at low cost.