Differential Case Assembly With Shaft-Supporting Protrusion
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Solution Overview
Problem
Existing power transmission devices face challenges in assembly flexibility, particularly in accommodating shaft members within differential cases, which limits assembly efficiency and precision.
Innovation Solution
The power transmission device incorporates a design where a first case member with a protrusion and a second case member with a recess are assembled, supporting a shaft member, allowing for improved assembly freedom by pre-arranging the shaft member in the recess and using connecting portions and support grooves for stable support and efficient oil passage management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional differential case structure is used, then the structural simplicity is maintained, but the assembly freedom and efficiency are limited
Solution Approach 1:
The differential case is divided into a first case member and a second case member that can be assembled separately. The first case member includes a protrusion while the second case member includes a corresponding recess, allowing modular assembly and improved assembly freedom without significantly increasing overall structural complexity.
2Manufacturing precision
If the shaft member is supported in a traditional manner, then the support stability is adequate, but the assembly precision and freedom are reduced
Solution Approach 1:
The protrusion on the first case member acts as an intermediary element that fits into the recess on the second case member, providing precise positioning and support for the shaft member. This intermediary structure enables accurate assembly without requiring complex support mechanisms.
Data Source
AI summary
A power transmission device having: a case formed by assembling a first case member and a second case member; and a shaft member supported by the case, the power transmission device comprising: a protrusion provided to the first case member and protruding in the axial direction along to the direction of assembling the case; and a recess provided to the second case member and recessed in the axial direction. The shaft member is supported by the protrusion in the recess.