Z-Shaped Arm Suspension Axle Bracket Load Transfer
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Solution Overview
Problem
Existing leading and trailing arm vehicle suspension systems lack features such as efficient load transfer, stress distribution, and ease of assembly, which can lead to increased stress risers, assembly complexity, and reduced product integrity.
Innovation Solution
The use of a z-shaped arm assembly with an axle bracket that includes attachment locations for shock absorbers, air springs, rack and pinion systems, and transverse torque rods, along with slotted caster adjustment holes and voided bushings, to enhance load transfer, reduce stress, and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional arm assemblies are used with separate brackets and multiple attachment points, then assembly flexibility is maintained, but assembly complexity increases and stress distribution deteriorates
Solution Approach 1:
The patent combines the arm, axle bracket, and multiple attachment points into a single integrated Z-shaped arm assembly. The vertical mounting plane surface is directly formed as part of the arm structure, eliminating the need for separate brackets and multiple fasteners. This merging of components simplifies assembly while maintaining all necessary attachment functions for shock absorbers, air springs, rack and pinion systems, and transverse torque rods.
2Reliability
If conventional arm fastening methods are used, then assembly is straightforward, but stress risers develop around fasteners reducing product integrity
Solution Approach 1:
The integrated Z-shaped arm assembly eliminates separate fasteners by incorporating the vertical mounting plane directly into the arm structure. This removes stress concentration points that would otherwise exist around fastener holes and connections, improving both stress distribution and product integrity.
Solution Approach 2:
The patent converts the potential harm of stress risers into a benefit by designing the Z-shaped arm with optimized geometry that naturally distributes stresses. The vertical mounting plane is positioned and dimensioned to create favorable stress flow patterns, turning what would be stress concentration zones into areas of efficient load transfer.
3Adaptability or versatility
If multiple separate suspension components are used, then attachment versatility is achieved, but assembly time and complexity increase
Solution Approach 1:
The Z-shaped arm assembly incorporates multiple attachment locations directly into its structure, including the vertical mounting plane for the arm, additional mounting surfaces for shock absorbers, air springs, rack and pinion systems, and transverse torque rods. This multi-functional design allows a single component to perform multiple attachment functions that would otherwise require several separate parts, thereby reducing assembly time while maintaining versatility.
4Force
If traditional arm designs are used, then manufacturing is simple, but load transfer efficiency is reduced due to stress risers
Solution Approach 1:
The patent optimizes the geometry of the Z-shaped arm, including the orientation and positioning of the vertical mounting plane, to improve load transfer efficiency. The arm cross-section and mounting surface dimensions are specifically designed to create favorable stress distribution patterns, maximizing the efficiency of load transfer from the arm to the axle bracket while minimizing stress concentrations.
Data Source
AI summary
A leading or trailing arm vehicle suspension system comprised of a fabricated vehicle axle and an arm assembly. The arm assembly includes an axle bracket attached to the axle and a leading or trailing arm attached to the axle bracket. The arm provides bending stiffness to control axle windup and longitudinal stiffness to control axle position is disclosed. The axle bracket is attached to the vehicle axle with a through-bolt connection. The axle bracket or the arm includes rack and pinion mounting attachment holes and also includes other built-in features providing efficient transfer of loads into the vehicle axle.