Omega-Shaped Spring Control Arm for Vehicle Suspension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spring control arms for vehicle wheel suspensions face challenges in achieving high stability and rigidity while minimizing weight and installation space, particularly in single-shell steel sheet constructions.
Innovation Solution
A spring control arm with an omega-shaped cross-section is designed, featuring a widened back for support and a central side wall region that remains straight to maximize section modulus, combined with flared upper side walls that create a smooth transition to the spring plate region, reducing stress peaks and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the spring control arm is made as a single-shell construction from steel sheet to reduce weight and installation space, then weight and installation space are reduced, but stability and rigidity (section modulus) may be compromised
Solution Approach 1:
The patent applies local quality by varying the cross-sectional shape along the length of the spring control arm. The omega-shaped cross-section with flared upper side walls is implemented specifically in the spring plate region where high section modulus is needed to support the spring, while other regions maintain a simpler U-shaped profile. This localized optimization provides high stability where required while minimizing weight overall.
Solution Approach 2:
The patent transitions from conventional two-dimensional flat or simple U-shaped cross-sections to a three-dimensional omega-shaped cross-section with flared upper side walls. This dimensional enhancement creates additional material distribution in the critical spring plate region, increasing the section modulus and thus the stability and load-bearing capacity without proportionally increasing weight.
2Stability of the object's composition
If the spring plate region is widened to increase section modulus and load-bearing capacity, then stability is improved, but weight and installation space increase
Solution Approach 1:
The omega-shaped cross-section with flared upper side walls is implemented specifically in the spring plate region where high section modulus is needed to support the spring, while other regions maintain a simpler U-shaped profile. This localized optimization provides high stability where required while minimizing weight overall.
Solution Approach 2:
The spring control arm is divided into different longitudinal sections with different cross-sectional characteristics. The spring plate region has the omega-shaped cross-section with flared walls for high section modulus, while the end sections and central region have simpler profiles. This segmentation allows weight optimization by providing structural complexity only where needed.
3Ease of manufacture
If sudden transitions are made from the spring plate region to adjacent regions to simplify manufacturing, then ease of manufacture is improved, but stress peaks occur reducing reliability
Solution Approach 1:
The patent employs curved, rounded transitions between the spring plate region and adjacent sections instead of sudden angular changes. The omega-shaped cross-section provides smooth geometric transitions that distribute stress evenly, eliminating stress concentration points while remaining compatible with standard sheet metal forming processes.
Data Source
AI summary
A spring control arm for a wheel suspension of a motor vehicle is formed as a single-shell, essentially U-shaped sheet metal part and includes a back, spaced-apart side walls adjoining the back and each having an upper side wall region connected to the back, a lower side wall region distal from the back, and a central side wall region arranged between the upper and lower side wall regions. The spring control arm has first and a second end sections for attachment and a wider spring plate region disposed therebetween. The spring control arm has a substantially omega-shaped cross section in the spring plate region, which is more pronounced in a central longitudinal section due to outwardly projecting upper side wall sections than in an end longitudinal section of the spring plate region.