Modular Gearbox Housing Using Identical Cast Shells
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Solution Overview
Problem
Current transmission housing designs are costly to produce and require a large number of parts, with existing solutions not effectively reducing production costs while maintaining structural integrity and stability.
Innovation Solution
A modular transmission housing system using two identical housing shells with identical interface features, including boreholes, contact surfaces, and centering aids, allowing for secure assembly and reduced material usage, along with oil catch pockets and reinforcing ribs to enhance lubrication and structural support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two identical housing shells are used to form a transmission housing, then production costs are reduced and the number of parts is minimized, but structural integrity and mounting stability must be maintained
Solution Approach 1:
The transmission housing is divided into two identical housing shells that can be manufactured separately using the same mold, then assembled together. This segmentation allows for simplified manufacturing processes and reduced tooling costs while maintaining the overall structural integrity through proper interface design with centering aids and mounting features.
Solution Approach 2:
The housing shells are designed with universal mounting features including foot flanges with fastening boreholes and integrated oil catch pockets. These multi-functional elements serve both structural support and lubrication functions, reducing the need for additional components and simplifying the overall design.
2Loss of substance
If housing shells are made with reduced wall thickness to minimize material usage, then production costs decrease, but load-bearing capacity may be compromised
Solution Approach 1:
The housing shells incorporate local reinforcement features such as bearing thickenings at critical load-bearing locations and reinforcing ribs on the inner surface. These localized quality enhancements provide necessary structural strength at specific points while maintaining reduced wall thickness in non-critical areas, optimizing material usage throughout the housing.
3Device complexity
If identical interface features are provided on both housing shells, then assembly is simplified and part inventory is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The housing shells are equipped with pre-formed centering aids including centering pins and corresponding pin bores that are integrated into the shell structure during manufacturing. These preliminary centering features ensure precise alignment during assembly, compensating for any variations in manufacturing precision and simplifying the assembly process.
Data Source
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AI summary
The invention relates to variants of a gearbox series having housings comprising housing shells, wherein in one variant the housing shells are produced from an identical cast body, in a second, weight-reduced variant the housing shells are produced from different cast bodies, and in a third, further weight-reduced variant the housing shells are produced from identical cast bodies identical to the cast body having reduced weight from the second variant.