Transmission Press Member Assembly With Visual Spline Alignment
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Solution Overview
Problem
The assembly of the press member in existing vehicle drive transmission devices is cumbersome due to the need to rotate it relative to the outer support to align splines, making it difficult for assemblers to match the splines in phase, especially when they are hard to see.
Innovation Solution
Incorporating an intermediate member with protrusions and a press member having insertion holes, which restricts rotation and allows the assembler to visually align and insert the protrusions, facilitating easier assembly by providing a clear view of the alignment through the insertion holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the press member is assembled to the outer support through the opening from the first side in the axial direction, then the assembly can be performed from an accessible side, but the assembler needs to rotate the press member to align the splines which makes the assembly troublesome
Solution Approach 1:
The intermediate member is prepared in advance with a protrusion that extends in the axial direction. This protrusion is designed to be inserted into an insertion hole of the press member before final assembly, pre-establishing the rotational alignment reference that simplifies the subsequent assembly operation.
Solution Approach 2:
The intermediate member acts as an intermediary between the press member and the second support. By coupling the press member to the intermediate member (which is coupled to the second support), the alignment function is separated from the support structure, making the assembly process simpler while maintaining functional integrity.
2Volume of moving object
If the splines are positioned as to be difficult to see, then the structural design can be compact, but the assembler needs to press and rotate the press member simultaneously which makes alignment difficult
Solution Approach 1:
The protrusion of the intermediate member serves as a visual alignment indicator that can be seen through the insertion hole from the first side in the axial direction. This visual cue system allows the assembler to accurately determine when the splines are aligned without needing to see the splines themselves, maintaining compact design while improving alignment precision.
3Manufacturing precision
If the press member is rotated relative to the outer support during assembly, then the splines can be aligned in phase, but unnecessary movements occur which increase the risk of damage to seal members
Solution Approach 1:
The protrusion of the intermediate member is designed to guide the press member into the correct rotational position before final assembly. This preliminary alignment action occurs in a controlled manner through the insertion hole, minimizing unnecessary rotations and reducing the risk of seal member damage.
Data Source
AI summary
A first support is open toward a first side in an axial direction. A press member is at such a position as to press a first friction plate and second friction plate of a friction clutch device from the first side in the axial direction. An intermediate member includes a body between the press member and a second support in the axial direction and a protrusion protruding toward the first side of the body in the axial direction. The press member has an insertion hole extending through the press member in the axial direction and configured to receive the protrusion.