Differential Carrier Rib Structure for Beaming Load Fatigue
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Solution Overview
Problem
Differential carriers in vehicle drivetrains face challenges with fatigue life due to beaming loads, which are not effectively addressed by existing materials, leading to increased material usage and weight.
Innovation Solution
A differential carrier design featuring a forward surface with asymmetrically positioned vertical ribs, which are attached to beaming ribs, enhancing robustness and fatigue resistance without excessive material addition, potentially made from cast aluminum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum material is used to reduce weight, then weight savings are achieved, but fatigue life due to beaming loads is compromised
Solution Approach 1:
The carrier is segmented into multiple functional ribs including vertical ribs, beaming ribs, and cross members that work together to distribute and manage loads. This segmentation allows the aluminum carrier to maintain structural integrity and fatigue resistance while keeping weight low.
Solution Approach 2:
The carrier employs a composite structural design combining multiple rib types and structural elements within the aluminum casting. This composite approach creates a multi-functional structure that simultaneously addresses weight reduction, fatigue resistance, and load distribution requirements.
2Reliability
If increased materials are added to improve fatigue life, then fatigue resistance is enhanced, but weight savings are negated
Solution Approach 1:
The carrier features local quality variations through differently positioned and dimensioned ribs. Vertical ribs provide localized support for fatigue resistance in high-stress areas, while beaming ribs handle lateral loads, allowing material to be concentrated where needed rather than uniformly distributed.
Solution Approach 2:
The carrier design incorporates vertical ribs that extend in the vertical dimension, creating a three-dimensional structural network. This vertical dimensionality allows the structure to absorb beaming loads through vertical deflection and distribution, enhancing fatigue resistance without adding excessive material.
3Strength
If vertical ribs are added to absorb beaming loads, then robustness is improved, but structural complexity increases
Solution Approach 1:
The vertical ribs are merged with beaming ribs and cross members to form an integrated structural system. This merging combines multiple load-bearing functions into a unified rib network that enhances robustness while avoiding the complexity of separate, isolated structural elements.
Solution Approach 2:
The rib structure serves multiple functions simultaneously: vertical ribs absorb beaming loads, beaming ribs handle lateral forces, and the interconnected network provides torsional stiffness and structural support. This multi-functionality reduces the need for additional specialized components.
Data Source
AI summary
An article of manufacture is provided having a differential carrier, the differential carrier including a forward surface having an input, the forward surface including a plurality of vertical ribs. In an example, the differential carrier may be used in a vehicle system for a rear differential of a drivetrain of the vehicle.