Bracketed Vibration Isolator Structure for Stronger Friction Fixing
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Solution Overview
Problem
Conventional vibration isolation devices with brackets face issues with holding force, where the separation distance from the first attachment member to the lower surface of the fitting portions can be large, leading to reduced fixing force due to external forces and reaction forces from the rubber member, resulting in instability.
Innovation Solution
The vibration isolation device incorporates a holding rubber compressed on the lower surface of the fitting portions, formed integrally with the main body rubber elastomer, and a fixed surface exposed on the upper surface of the fitting portions, which is pressed and fixed by static friction onto the inner surface of the fitting grooves, reducing the separation distance and enhancing the fixing force. Additionally, the main body rubber elastomer penetrates through a through hole in the second attachment member, ensuring a stable path and durable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the separation distance from the first attachment member to the lower surface of the fitting portions is large, then the assembly is easier, but the fixing force is reduced due to external forces and reaction forces
Solution Approach 1:
A holding rubber is introduced as an intermediary element between the fitting portions and the bracket. This holding rubber is compressed in a state where the fitting portions are embedded in the fitting grooves, and it is formed integrally with the main body rubber elastomer on the lower surface of the fitting portions. The holding rubber acts as a mediator that transmits and stabilizes the fixing force, allowing for adequate separation distance for assembly while maintaining strong fixation through the friction and compression provided by the holding rubber.
2Device complexity
If the holding rubber is formed integrally with the main body rubber elastomer, then the structure is simplified, but the manufacturing precision becomes more difficult to control
Solution Approach 1:
The holding rubber is formed integrally with the main body rubber elastomer in a single molding process, merging two components into one. This integration simplifies the overall structure by eliminating the need for separate assembly of the holding rubber and main body rubber elastomer, reducing the number of parts and assembly steps. The integral formation ensures consistent material properties and reliable bonding throughout the structure.
Solution Approach 2:
The molding parameters of the integral structure are optimized to control the formation of the holding rubber and main body rubber elastomer as a unified component. By adjusting parameters such as injection pressure, temperature, and cooling rates during molding, the patent achieves precise control over the integration quality, ensuring proper density, bonding strength, and dimensional accuracy of the combined structure.
3Strength
If the fixed surface is exposed without being covered by the main body rubber elastomer, then the static friction fixing is improved, but the protection of the fixed surface is reduced
Solution Approach 1:
The fixed surface is selectively exposed only in the specific region where it contacts the inner surface of the fitting grooves, while other portions of the second attachment member remain covered by the main body rubber elastomer. This local exposure strategy maximizes the static friction fixing force at the critical contact interface between the fixed surface and fitting grooves, while the covered portions continue to provide protection against wear, corrosion, and environmental damage. The holding rubber also provides additional protective coverage to the exposed fixed surface area.
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 the fixing force between the fitting portions and grooves, stabilizes the attachment, and ensures efficient assembly and operation by reducing moment generation from external forces and maintaining the fixing force through static friction, even when accommodating rubber members.
Implementation Method 1
the fitting portions are biased downward by elasticity of the upper and lower biasing rubber which is compressed between the fitting portions and the fitting grooves in an up-down direction
Implementation Method 2
the fixed surface is exposed without being covered by the main body rubber elastomer, directly superimposed on an inner surface of the fitting grooves, and pressed and fixed by static friction to the inner surface of the fitting grooves
Data Source
AI summary
A vibration isolation device with bracket includes a first attachment member and a second attachment member coupled by a main body rubber elastomer. The second attachment member has a frame shape with a through hole. The main body rubber elastomer is fastened to an upper surface side of the second attachment member. The main body rubber elastomer penetrates to a lower surface side of the second attachment member through the through hole. A holding rubber is formed integrally with the main body rubber elastomer on a lower surface of fitting portions of the second attachment member. A fixed surface is arranged on an upper surface of the fitting portions. The fixed surface is exposed by the main body rubber elastomer, directly superimposed on an inner surface of the fitting grooves, and pressed and fixed by static friction to the inner surface of the fitting grooves by the holding rubber.