Segmented Rubber Mounting Bush for Multi-Directional Load Support
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Solution Overview
Problem
Conventional mounting bushes for electric compressors suffer from large bending angles and strains due to their integral structure, which limits their ability to withstand external forces uniformly in various directions, and restricts design freedom.
Innovation Solution
The mounting bush is designed with an inner pipe, outer pipe, and rubber that includes X-axis and Z-axis bridges, each supporting horizontal and vertical loads respectively, with asymmetric and curved shapes to disperse loads and minimize bending moments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rubber is formed in an integral structure, then the manufacturing is simple, but the bending angle and strain are large
Solution Approach 1:
The rubber is divided into multiple independent bridges (first bridge, second bridge, third bridge, fourth bridge) instead of using an integral structure. Each bridge is positioned at different locations between the inner and outer pipes, creating a segmented configuration that reduces bending angles and strains while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
Each bridge is designed with specific local characteristics including different cross-sectional areas, curvature radii, and positioning. The first and second bridges have different properties from the third and fourth bridges, allowing each region to optimally handle specific load directions and magnitudes, thereby reducing overall bending moments while maintaining manufacturing simplicity
2Reliability
If the mounting bush is designed for uniform load distribution, then the durability is improved, but the design freedom is restricted
Solution Approach 1:
Each bridge is designed with unique local characteristics including varying cross-sectional areas, different curvature radii, and specific positioning angles. The first bridge has a first cross-sectional area and first curvature radius, while the second bridge has a second cross-sectional area and second curvature radius, allowing optimized load distribution across different directions without restricting design freedom
Solution Approach 2:
The bridges are designed with asymmetric properties where opposite bridges have different characteristics. The first bridge differs from the second bridge, and the third bridge differs from the fourth bridge, creating an asymmetric configuration that enables durable load distribution in multiple directions while maintaining high design freedom for adapting to different compressor characteristics
3Strength
If the bridges are formed with curved shape, then the elastic support is enhanced, but the manufacturing precision is reduced
Solution Approach 1:
The curved elastic structure is divided into multiple discrete bridges rather than a single continuous curved element. This segmentation allows each bridge to be manufactured with standard curvature tolerances while collectively providing the required elastic support, balancing manufacturing precision with enhanced elastic capability
Solution Approach 2:
The curvature radius and cross-sectional area of each bridge are carefully controlled within specific parameter ranges. By optimizing these parameters, the bridges achieve sufficient elastic support capability while remaining manufacturable with conventional precision tolerances, resolving the contradiction between elastic performance and manufacturing precision
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 design reduces bending angles and strains, enhancing durability and design freedom by dispersing loads in various directions, minimizing damage from deformation and bending moments.
Implementation Method 1
an X-axis bridge formed on each opposite side between the inner side surface and the outer side surface such that the X-axis bridge elastically supports against a horizontal load
Implementation Method 2
a Z-axis bridge which is formed in a direction perpendicular to the X-axis bridge and which is formed on each opposite side between the inner side surface and the outer side surface such that the Z-axis bridge elastically supports against a vertical load
Implementation Method 3
Each of the X-axis bridge and the Z-axis bridge may be formed in a curved shape, thereby having an elastic force
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Proposed is a mounting bush including an inner pipe (10), an outer pipe (20), and a rubber (30) mounted between the inner pipe and the outer pipe. The rubber includes an inner side surface (32) formed along an outer circumferential surface of the inner pipe, an outer side surface (34) formed along an inner circumferential surface of the outer pipe, and a bridge connecting between the inner side surface and the outer side surface. The bridge includes an X-axis bridge (36) formed on each opposite side between the inner side surface and the outer side surface such that the X-axis bridge elastically supports against a horizontal load, and a Y-axis bridge (38) which is formed in a direction perpendicular to the X-axis bridge and which is formed on each opposite side between the inner side surface and the outer side surface such that the Y-axis bridge elastically supports against a vertical load.