Vibration Isolating Device Layout Flexibility
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Solution Overview
Problem
Existing vibration isolating devices for motor vehicle engines face limitations in layout flexibility due to projections that interfere with the vehicle body and surrounding members, and these projections increase the weight of the inner member, thereby reducing vibration characteristics.
Innovation Solution
A vibration isolating device with a cylindrical part and an inner member connected by an elastic body, featuring a projecting part and a Y-direction supporting part that are connected by a Y-direction elastic part, allowing for heightened spring constant without projecting outwardly, thus preventing interference with the vehicle body and surrounding members, and maintaining reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the inner member side projection and the projection are connected by a Y direction elastic part to heighten the spring constant, then the spring constant in the Y direction is improved, but the projections interfere with the vehicle body and surrounding members, restricting layout flexibility
Solution Approach 1:
The invention changes the spatial arrangement from a downward projection configuration to a lateral projection configuration within the cylindrical part. The projecting part is arranged on the outer side of the inner member in the radial direction, and the Y direction elastic part extends in the Y direction connecting the projecting part to the inner member. This dimensional reconfiguration allows the elastic part to function effectively without requiring downward projections that would interfere with the vehicle body, thus resolving the contradiction between achieving high spring constant and maintaining layout flexibility.
2Strength
If a relatively large inner member side projection is provided in the inner member to connect to the engine, then the connection strength is improved, but the weight of the inner member is increased, reducing vibration characteristics
Solution Approach 1:
The invention applies local quality by providing the projecting part only at the specific location where connection to the engine is needed, rather than increasing the overall size or weight of the inner member. The projecting part is a localized structural feature that provides the necessary connection strength while minimizing additional weight. This localized approach allows the inner member to maintain its lightweight properties while still achieving strong engine connection through the strategically positioned projecting part.
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 enhances the spring constant in the Y-direction while maintaining layout flexibility and reducing the weight of the inner member, preventing interference with the vehicle body and surrounding members, thereby improving vibration isolation and reducing the impact on the engine bracket's vibration characteristics.
Implementation Method 1
an elastic body (20) providing an elastic connection between the inner member (30) and the cylindrical part (12)
Implementation Method 2
the Y direction elastic part (24) which functions as a main body at the time of receiving a vibration in the Y direction
Data Source
AI summary
A bracket has a cylindrical part which opens in the Y direction. An inner member is arranged within the cylindrical part and faces in the Y direction. An elastic body connects the inner member and the cylindrical part and includes a pair of X direction elastic parts, a projecting part, and a Y-direction elastic part. The X direction elastic parts connect the inner member and the cylindrical part in an X direction. The projecting part is provided in an end in the Y direction of the cylindrical part. The Y direction elastic part is connected to a Y direction supporting part of a bottom wall. The projecting part partially overlaps with the Y direction supporting part of the inner member in the Y direction. No part projects outwardly of the cylindrical part and interferes with the vehicle body or surrounding members, increasing a degree of freedom in layout.