Transfer Case Oil Pump Assembly Alignment
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Solution Overview
Problem
The existing transfer case oil pump assembly process is prone to defects and complex assembly due to imprecise alignment of components, which affects the lubrication and operation of planetary gear sets in vehicles.
Innovation Solution
The proposed solution involves a transfer case oil pump assembly layout that utilizes alignment members, locating flanges, and anti-rotation members to ensure precise alignment and secure positioning of the gear set within the housing and cover, using a ring with securing tabs and channels to maintain radial positioning and apply retention forces, thereby simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional die cast process is used for transfer case oil pump assembly, then manufacturing simplicity is maintained, but alignment precision and assembly quality deteriorate due to defects and imprecise component alignment
Solution Approach 1:
The housing is divided into multiple segments with individual locating flanges and tabs for each component (gear set, cover, etc.). This segmentation allows each part to be precisely positioned and aligned during assembly, eliminating the alignment precision problems associated with traditional die cast processes while maintaining manufacturing feasibility through modular construction.
Solution Approach 2:
Locating flanges and alignment tabs serve as intermediary elements between the housing and other components (gear set, cover). These intermediaries provide precise geometric references that ensure accurate alignment and positioning, resolving the contradiction between manufacturing simplicity and alignment precision by introducing dedicated alignment features rather than relying on imprecise die cast surfaces.
2Manufacturing precision
If alignment members and locating flanges are added to improve component alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The locating flanges are merged with the housing structure itself rather than being separate components. The tabs are integrated into the housing and cover designs, eliminating the need for additional standalone alignment members. This merging approach provides precise alignment functionality while minimizing the increase in device complexity by using the existing structural elements for dual purposes (structural support and alignment reference).
Data Source
AI summary
An exemplary assembly includes a housing including a flange extending from a perimeter of the housing, a cover including an edge tab extending from a perimeter of the cover, a gear set positioned between the housing and the cover, an alignment member positioned between the flange and the edge tab, the alignment member adjacent to an exterior surface of the gear set, and a ring at least partially encircling the housing, the ring including an anti-rotation member and a securing tab. The edge tab and the alignment member are enclosed by the anti-rotation member to maintain a radial position of the gear set.