Differential Clutch Layout With One-Side Plate Assembly
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Solution Overview
Problem
The existing differential apparatus has a high number of components and increased manufacturing costs due to the multi-plate clutch being provided on both sides of the pair of output gears, requiring special tools for assembly and maintenance.
Innovation Solution
The differential apparatus is designed with the multi-plate clutch provided only on the side of the opening of the case main body, with outer clutch plates engaged with the differential case and inner clutch plates engaged with one of the output gears, reducing the number of components and eliminating the need for special tools in assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the multi-plate clutch is provided on both sides of the pair of output gears, then the differential limiting function is ensured, but the number of components increases and manufacturing cost increases
Solution Approach 1:
The patent applies asymmetry by providing the multi-plate clutch only on one side of the output gears rather than symmetrically on both sides. The differential case has an opening formed on one side, and the multi-plate clutch is positioned only on that side, creating an asymmetric structure that reduces component count while maintaining the essential differential limiting function through the engagement between outer clutch plates with the differential case and inner clutch plates with the output gear.
2Reliability
If the multi-plate clutch is provided on the back side of the case main body, then the differential limiting function is ensured, but special tools are required for assembly and maintenance
Solution Approach 1:
The patent applies preliminary action by pre-forming an opening on one side of the differential case main body during manufacturing. This opening is prepared in advance to provide direct access to the multi-plate clutch components, eliminating the need for special disassembly tools during assembly and maintenance operations. The opening allows technicians to access and service the clutch from the exterior without complex tooling requirements.
Data Source
AI summary
A differential apparatus includes a differential unit and a multi-plate clutch. The differential unit includes a differential case, a differential gear and a pair of output gears. The differential case includes a case main body and a cover body to close an opening of the case main body. The opening of the case main body is formed on a side of one of the pair of output gears. The multi-plate clutch is provided only on a side of the opening of the case main body. Outer clutch plates of the multi-plate clutch are engaged with the differential case. Inner clutch plates of the multi-plate clutch are engaged with the one of the pair of the output gears.