Stabilizer Bush Oval Bore for Uniform Bonding Pressure
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Solution Overview
Problem
The bonding strength between a bush and a stabilizer bar is inadequate due to uneven surface pressure distribution, leading to potential misalignment and interference issues, which affect the vehicle's stability and ride quality.
Innovation Solution
The bush features a hole part with a first and second arc part, where the second arc part has a smaller curvature radius, located at the opening side of the bracket, and the first arc part is opposite the opening, ensuring uniform surface pressure distribution by controlling the gap between their centers, or a bonding tool with a pressing part that directs the bush's ends inward, preventing material flow and enhancing surface pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a sliding bush is used to allow relative movement along the axial direction of the torsion part, then the bush can accommodate movement, but it may interfere with other parts, generate noise, and allow mud and water penetration
Solution Approach 1:
The invention extracts the sliding function by providing clearance between the bush outer circumferential surface and the torsion part, eliminating the need for direct contact while maintaining movement accommodation. This removes the source of noise and contamination from mud and water penetration.
Solution Approach 2:
The invention provides beforehand cushioning by designing the bush with sufficient length and appropriate clearance dimensions to prevent interference with other parts while accommodating axial movement. The structural design anticipates and prevents potential interference issues before they occur.
2Reliability
If adhesive bonding is used to fix the bush to the torsion part, then relative movement is prevented, but surface pressure becomes uneven due to bush shape, resulting in insufficient bonding strength
Solution Approach 1:
The invention applies local quality by providing different clearance dimensions at different locations of the bush. The first clearance dimension differs from the second clearance dimension, creating non-uniform clearance distribution that compensates for the bush shape irregularities and achieves uniform surface pressure during bonding.
Solution Approach 2:
The invention changes the clearance parameter from a single uniform dimension to two different clearance dimensions (first and second clearance dimensions). This parameter change allows optimization of surface pressure distribution while maintaining the bonding function.
3Device complexity
If the bush volume is uneven along the circumferential direction of the torsion part, then the bush structure is compact, but surface pressure during bonding becomes uneven, reducing bonding strength
Solution Approach 1:
The invention resolves the contradiction by applying local quality through differentiated clearance dimensions. The first clearance dimension and second clearance dimension are set differently to compensate for the uneven bush volume distribution, achieving uniform surface pressure while maintaining structural compactness.
Solution Approach 2:
The invention employs asymmetry by setting the first clearance dimension different from the second clearance dimension. This asymmetric clearance design matches the asymmetric bush volume distribution, transforming the disadvantage of uneven volume into an advantage for achieving uniform bonding pressure.
Data Source
AI summary
Bonding the bush to the stabilizer bar, by surface pressure in the bonding surface (inner circumferential surface) of the hole-part of the bush being made uniform, bonding strength is obtained. The first arc part is formed at the opposite side of the opening of the U-shaped part of the bracket in the bonding and second arc part is formed in the opening side, in the hole-part of the bush. The first and second arc parts are circular arc parts being formed in circular arc shape or approximately circular arc shape or are ellipse arc part being formed in the ellipse arc shape or approximately ellipse arc shape. In the hole-part, the center of the first and second arc parts are separated. The curvature radius of the second arc part gets smaller than the curvature radius of the first arc part. The hole-part is formed in an oval shape.