Gear-Change Selector Plug-In Sealing for Low Mounting Force
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Solution Overview
Problem
Existing gear-change selector modules are costly to produce due to the high requirements for tightness and complexity in connecting hydraulic fluid channels, leading to unreliable function if leaks occur.
Innovation Solution
A gear-change selector module design featuring a pipeline module with pipes connected to a gear-change selector housing via plug-in connections, utilizing seals at multiple levels to ensure tightness while reducing mounting force, thereby simplifying production and maintaining high tightness standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seals are arranged at a single level in plug-in connections, then the connection is simple, but the mounting force is high and tightness requirements are difficult to meet
Solution Approach 1:
The seal arrangement is segmented into multiple levels (at least two different levels) along the plug-in direction. This segmentation distributes the sealing function across different positions, reducing the concentration of mounting force at any single point while maintaining overall tightness.
Solution Approach 2:
The seal arrangement transitions from a single-plane (2D) configuration to a multi-level (3D) configuration along the plug-in direction. This dimensional change allows seals to be distributed at different positions, effectively reducing mounting force while ensuring tightness through multiple sealing contact points.
2Force
If multiple seals are arranged at different levels, then mounting force is reduced, but the plug-in connection becomes more complex
Solution Approach 1:
The plug-in connection is segmented into multiple sealing levels, with each level containing seals at specific positions. This segmentation allows the complex sealing function to be divided into manageable sections, reducing mounting force while organizing complexity in a structured manner.
Solution Approach 2:
Different levels of seals are positioned at specific locations within the plug-in connection based on local requirements. This local quality approach ensures that complexity is introduced only where necessary for force distribution, rather than uniformly throughout the entire connection.
3Length of stationary object
If seals are arranged closely together, then the plug-in connection is compact, but mounting force concentrates and causes tilt moments
Solution Approach 1:
Seals are arranged in multiple levels along the plug-in direction rather than being confined to a single plane. This dimensional arrangement distributes mounting force across different positions, preventing concentration and tilt moments while maintaining a compact overall structure.
Solution Approach 2:
The multi-level seal arrangement acts as a counterbalancing mechanism against tilt moments. By distributing seals at different levels, the system creates opposing forces that counteract potential tilting, ensuring even force distribution without requiring a longer connection structure.
Data Source
Figure 1
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Figure 4~5
AI summary
A gear-change selector module has a pipeline module (14) comprising a plurality of pipes (22) for providing a working fluid, and a gear-change selector housing (12) having a plurality of channels (20) which are each assigned to one of the pipes (22). The pipes (22) are coupled to the channels (20) via a respective plug-in connection (24). Each plug-in connection (24) has a seal (30). Viewed in the plug-in direction (S), the seals (30) are arranged at different levels (31, 32, 33).