Shift Rod Form-Fit Connection for Tool-Free Axial Fixation
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Solution Overview
Problem
The existing connection methods for shifting elements in manual transmissions are structurally complex and require additional components for axial fixation, making maintenance and installation cumbersome and costly.
Innovation Solution
A shift track selection rod with a connection geometry that forms a form-fit fixation with the shifting element along its axis, using corresponding geometries such as depressions, protrusions, or cam shapes, allowing for simple production and installation without additional elements, and enabling rotational movement for gear shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components are used to fix the shifting element axially on the shift track selection rod, then the fixation is secure and reliable, but the device complexity increases and maintenance becomes more difficult
Solution Approach 1:
The connection geometry is integrated directly into the shift track selection rod, combining the fixation function with the rod structure itself. The depression and protrusion features are formed as part of the rod's geometry, eliminating the need for separate fixation components while maintaining secure axial fixation of the shifting element.
2Reliability
If additional components are provided to fix the shifting element, then the axial fixation is secure, but the removal and installation work becomes extensive and complex
Solution Approach 1:
The fixation components are extracted from the system by integrating them directly into the shift track selection rod structure. The depression and protrusion features are built-in geometric elements rather than separate parts, allowing the shifting element to be secured without additional components that would complicate maintenance operations.
3Device complexity
If a form-fit connection geometry is used to fix the shifting element without additional elements, then the device complexity is reduced and production is simplified, but the fixation must still be secure and reliable
Solution Approach 1:
The connection geometry employs asymmetric features including a depression with specific dimensional relationships and a protrusion with corresponding asymmetric shape. The protrusion has a width and length that create a form-fit connection, with the asymmetric geometry ensuring proper orientation and secure fixation of the shifting element on the shift track selection rod.
Data Source
AI summary
A shift track selection rod and a shifting element are provided which can be connected to one another without additional fastening elements. A system consists of the shift track selection rod and the shifting element. A transmission actuator includes the system. A transmission includes the system or the transmission actuator.