Motor Vehicle Suspension Arm With Transverse Edges
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Solution Overview
Problem
Existing motor vehicle suspension arms face challenges in achieving a balance between low mass and sufficient stiffness, with traditional methods resulting in reduced joint fixing options and hazardous shell positioning during assembly.
Innovation Solution
A suspension arm design featuring two half-shells fixed along a mean junction plane with first edges extending parallel and second edges extending transversely, facilitating assembly and providing internal volume for stiffness, using laser welding for fixation and incorporating transverse and longitudinal sleeves for articulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the suspension arm is formed by assembling two metal walls with central portions, then the mass is reduced, but the stiffness is limited and joint fixing options are reduced
Solution Approach 1:
The suspension arm is divided into two half-shells that are assembled together along a mean junction plane. This segmentation allows the arm to maintain low mass while the assembly provides sufficient stiffness through the combined structure and multiple fixing edges.
Solution Approach 2:
The invention adds a third dimension to the assembly by introducing edges that extend both in the mean junction plane and transversely to it. This multi-directional edge configuration creates a three-dimensional assembly structure that enhances stiffness in multiple directions while maintaining low mass.
2Weight of moving object
If the suspension arm is formed by assembling two metal walls with central portions, then the mass is reduced, but the joint fixing options are significantly reduced
Solution Approach 1:
The half-shells are designed with multiple types of edges (first edges extending in the mean junction plane, second edges extending transversely) that can serve different functions. These edges can be assembled by welding or other joining methods, providing multiple joint fixing options and enhancing the versatility of the suspension arm design.
3Reliability
If the two shells are fixed by welding, then the assembly is secure, but the positioning of shells during fixing is hazardous
Solution Approach 1:
The half-shells are designed with first and second edges that extend in different directions, creating inherent geometric constraints that guide the positioning of shells during assembly. This preliminary geometric arrangement ensures correct positioning before welding, reducing assembly hazards while maintaining secure fixation.
4Strength
If the suspension arm requires high stiffness to withstand driving stresses, then the mass increases, but low mass is favorable for acceleration conditions
Solution Approach 1:
The suspension arm is constructed as a composite structure formed by assembling two half-shells with multiple edges. This composite assembly provides high stiffness to withstand driving stresses while maintaining low mass, as the distributed edge configuration efficiently resists bending moments without requiring excessive material.
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
The design enables the production of a lightweight suspension arm with improved stiffness and simplified assembly, enhancing the arm's ability to withstand bending moments while maintaining low mass, thus improving road holding and handling.
Implementation Method 1
the first edges and / or second edges are assembled to each other by welding, preferably by laser welding
Data Source
Figure 1~3
Figure 4~6
AI summary
The invention relates to a motor vehicle suspension arm (4) including two shell halves (14, 16) attached to one another along a median joining plane (L) and forming the structure of the arm (4); the two shell halves (14, 16) include first attachment edges (18, 20) extending in the median joining plane (L) and in mutual contact in said plane, and second attachment edges (22, 24) extending transversely, preferably perpendicularly, to said plane (L), said second attachment edges being in mutual contact in the transverse area thereof. The invention also relates to a motor vehicle including such a suspension arm (4), the arm being hingedly mounted to the structure of the vehicle and to a wheel of said vehicle.