Asymmetric Bearing Bracket Structure for Lower Weld Tension
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Solution Overview
Problem
Existing bearing brackets for vehicle axles face challenges in achieving weight reduction while maintaining a sufficient life of the welding connection between the bracket and the chassis beam, particularly at the front side where peak tensions occur.
Innovation Solution
The bearing bracket design features two separate side plates welded to the chassis at the upper edge, with a narrowed front side and optional reinforcement plates, and a closed contour at the top end portion to reduce weld tension, allowing for a continuous weld with reduced material thickness and omission of reinforcement plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the bearing bracket uses standard width front side design, then the structural strength is sufficient, but the weld tension is high reducing the service life
Solution Approach 1:
The bearing bracket employs an asymmetric design where the front side width is reduced compared to the rear side width. Specifically, the front side width is made smaller than the rear side width, creating an asymmetric cross-sectional profile. This asymmetry strategically places less material at the front where weld tensions are highest, thereby reducing the weld tension and extending the service life of the welded connection between the bearing bracket and the vehicle body.
2Weight of moving object
If the bearing bracket uses reduced material thickness for weight reduction, then the vehicle weight decreases, but the structural integrity and weld strength may be compromised
Solution Approach 1:
The bearing bracket applies local quality by varying the material thickness and width at different locations based on the local stress requirements. The front side has reduced width and optimized thickness where weld tensions are highest, while the rear side maintains sufficient width and thickness for overall structural support. This localized optimization reduces the total material usage and vehicle weight while preserving structural integrity at critical areas.
3Duration of action of stationary object
If the bearing bracket uses narrow front side design, then the weld tension is reduced extending weld life, but the manufacturing complexity increases
Solution Approach 1:
The bearing bracket is designed as a single integrated piece with distinct width variations along its length, segmented into different width zones (narrower front side, wider rear side). This segmentation approach allows the complex asymmetric shape to be manufactured as one piece using stamping or bending processes, avoiding the need for multiple separate components and welds, thereby managing manufacturing complexity while achieving the narrow front side design for reduced weld tension.
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 extends the life of the welded connection, reduces material and weight, and maintains structural integrity by distributing load effectively, thereby enhancing the durability of the vehicle's wheel axle suspension.
Implementation Method 1
two opposite side plates (10A, 10B) each having a top end portion (11A, 11B) adapted to be welded to a chassis beam (2)
Data Source
Figure 1~4
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Figure 9~11
AI summary
A bearing bracket (1) for a vehicle axle assembly comprises two opposite side plates (10A, 10B) for pivotally mounting a trailing arm (3). The side plates have a top end portion (11A, 11B) to be welded to a chassis beam (2), each of which has a curved front end protrusion (16A, 16B) and a curved rear end protrusion (17A, 17B). The front end protrusion (16A, 16B) and rear end protrusion (17A, 17B) are curved towards the other side plate (10A, 10B) in the width direction (Y). The front end protrusions (16A, 16B) form a front side (16) of a top end portion (11) of the bearing bracket (1) and the rear end protrusions (17A, 17B) form a rear side (17) of the top end portion (11) of the bearing bracket (1). The rear side (17) is wider than said front side (16).