Modular Vehicle Cradle Segmentation for Weight Reduction
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Solution Overview
Problem
Monolithic metallic cradles used in motor vehicles are heavy, bulky, and costly, affecting handling, performance, and fuel efficiency, while requiring excessive material and energy for manufacturing.
Innovation Solution
A modular cradle assembly method that divides the cradle into lightweight, pre-fabricated elements, including a base and two modules, allowing for separate manufacturing and assembly, reducing material usage and simplifying handling and assembly processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If monolithic metallic cradles are used to ensure operational rigidity and limit manufacturing operations, then structural strength and manufacturing simplicity are improved, but weight and bulk increase complicating handling and undermining vehicle performance
Solution Approach 1:
The cradle is divided into multiple modular components including a base, steering housing, and axle carrier that can be manufactured separately and assembled together. This segmentation allows each component to be optimized independently for strength-to-weight ratio, reducing overall cradle weight while maintaining operational rigidity through precise assembly interfaces and selective use of high-strength materials in critical load-bearing areas.
2Ease of manufacture
If monolithic metallic cradles are used to limit manufacturing operations, then manufacturing process simplicity is improved, but material consumption and energy requirement increase
Solution Approach 1:
The cradle system is segmented into manufacturable modules (base, steering housing, axle carrier) that can be produced using optimized processes for each component size and material requirement. This allows use of lighter, more efficient manufacturing processes such as aluminum casting or extrusion for individual parts rather than requiring large-scale monolithic steel casting, thereby reducing total material consumption and energy requirements while maintaining manufacturing feasibility.
Solution Approach 2:
The modular cradle allows combination of different materials optimized for specific functions - such as aluminum alloys for the base and housing to reduce weight, and high-strength steels only where structurally necessary. This composite material approach reduces overall material consumption compared to monolithic metallic construction while maintaining or improving ease of manufacture through specialized processes for each material type.
3Strength
If monolithic metallic cradles are used to ensure structural integrity, then structural strength is improved, but handling difficulty and vehicle performance decrease
Solution Approach 1:
The cradle is segmented into modular components of manageable size and weight that can be easily handled, transported, and assembled by standard factory equipment and personnel. The base, steering housing, and axle carrier can be moved independently, improving ease of operation during assembly and maintenance while maintaining structural integrity through precision-machined mounting interfaces and rigid connection points that ensure proper alignment and load transfer.
4Weight of moving object
If modular cradle components are used to reduce weight and simplify handling, then handling ease and material efficiency are improved, but assembly complexity increases
Solution Approach 1:
The modular cradle components are designed with standardized mounting interfaces, alignment features, and fastening systems that simplify the assembly process despite the increased number of parts. The base includes pre-configured mounting areas for the steering housing and axle carrier with standardized bolt patterns and locating features, reducing assembly complexity to straightforward mechanical connections that can be performed with standard tools and procedures.
Data Source
AI summary
The present invention concerns a method for assembling a modular cradle (1) for a vehicle steering axle, said method comprising a prefabrication step (a), which involves separately producing a base (3), a first module (10) that comprises a first section (2A) of a steering housing (2) for guiding a rack, and a first bearing (11) for receiving a stabilizer bar (13), a second module (20), separate from the base (3) and from the first module (10), which comprises a second section (2B) of the steering housing (2) for guiding the rack and a second bearing (21) for receiving the stabilizer bar (13), followed by an assembly step (b), which involves mounting and securing the first module (10) on a left-hand receiving area (7) of the base (3), and the second module (20) on a right-hand receiving area (8) of said base (3).