Drive Unit Assembly Universal Differential Housing
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Solution Overview
Problem
The existing drive unit assemblies for heavy vehicles require two distinct axle housings due to differences in component count, leading to increased manufacturing complexity and costs, as the forward-rear axle housing must accommodate more components than the rear-rear axle housing.
Innovation Solution
A drive unit assembly with a differential unit housed in a single drive unit housing that includes mounting features for external securing to an axle assembly, allowing the same differential carrier to be used for both forward-rear and rear-rear axle assemblies, thereby simplifying manufacturing and assembly by reducing the need for separate housing designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the forward-rear axle housing accommodates both inter-axle differential unit and forward-rear differential unit, then power transmission function is achieved, but the housing size and manufacturing complexity increase
Solution Approach 1:
The patent divides the differential unit into two separate functional components: the inter-axle differential unit housed in the drive unit housing, and the axle differential unit housed in the axle housing. This segmentation allows each housing to be optimized independently, reducing the size and complexity of individual components while maintaining the complete power transmission function.
Solution Approach 2:
The drive unit housing with the inter-axle differential unit is designed as a universal component that can be applied to both forward-rear and rear-rear axle assemblies. This multi-functionality eliminates the need for different housing designs for different axle positions, reducing manufacturing complexity and inventory requirements.
2Reliability
If two different axle housings are designed for forward-rear and rear-rear axles, then specific functional requirements are met, but manufacturing complexity and costs increase
Solution Approach 1:
The patent designs the drive unit housing and differential carrier as universal components that can be used in both forward-rear and rear-rear axle assemblies. The standardized interface and mounting features allow the same housing design to serve multiple functions, eliminating the need for separate manufacturing lines and reducing production costs.
Solution Approach 2:
The patent combines the inter-axle differential function and axle differential function into a integrated drive unit assembly that can be applied to both axle types. By merging these functions into a standardized module, the system reduces the number of unique housing designs required while maintaining all necessary functional capabilities.
3Ease of operation
If the drive unit housing is secured externally to the axle assembly, then assembly flexibility is improved, but connection complexity increases
Solution Approach 1:
The patent separates the drive unit housing from the axle housing, allowing them to be manufactured and assembled independently. The external securing arrangement with mounting features on both components enables modular assembly, improving flexibility while keeping the connection structure simple through standardized mounting interfaces.
Data Source
AI summary
A drive unit assembly including an input element, a first output element, a second output element and a drive unit housing containing a differential unit, the differential unit drivingly coupling the input element, the first output element and the second output element, the input element having input coupling features positioned externally of the drive unit housing, the first output element having output coupling features positioned externally of the drive unit housing, wherein the drive unit housing includes at least one mounting feature for securing the drive unit housing externally relative to an axle assembly and the second output element is suitable for driving an axle assembly.