Gear Selector Module Sealing Layout for Low-Force Hydraulic Assembly
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Solution Overview
Problem
Existing gear-change selector modules are costly to produce and require high tightness, which is difficult to achieve due to the need for reliable hydraulic fluid sealing.
Innovation Solution
A gear-change selector module design with a pipeline module and gear-change selector housing, featuring plug-in connections with seals at multiple levels to ensure tightness and reduce mounting forces, using O-rings arranged in a zigzag pattern to facilitate assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-level seal connections are used to ensure tightness, then high tightness can be achieved, but the mounting force required is very high and production cost increases
Solution Approach 1:
The seal connection is segmented into multiple levels (first level, second level, third level) along the plug-in direction. Each level has seals arranged at different positions, distributing the sealing function across multiple stages rather than relying on a single high-force connection point. This segmentation allows the mounting force to be distributed across multiple seal engagement points.
Solution Approach 2:
The seal arrangement extends along the plug-in direction (axial dimension) rather than concentrating seals at a single plane. By arranging seals at different levels (first level, second level, third level) spaced at specific distances, the connection transitions from a single-plane seal to a multi-level axial seal configuration, reducing the force required at each individual seal.
2Stability of the object's composition
If multiple seals are arranged at the same level to distribute force, then even force transfer is achieved, but tilt moments occur causing misalignment
Solution Approach 1:
The seal arrangement moves from a single-level two-dimensional configuration to a multi-level three-dimensional configuration along the plug-in direction. By spacing seals at different levels (first level, second level, third level) with specific distances between them, the design eliminates tilt moments that would occur with co-planar seals, maintaining both even force transfer and proper alignment.
Solution Approach 2:
The seals are arranged in a predetermined sequence along the plug-in direction, with specific distances between levels. This preliminary arrangement ensures that as the pipeline module is inserted, seals engage in a controlled sequence, preventing tilt moments and misalignment before they can occur during the connection process.
3Ease of manufacture
If seals are arranged at different levels to reduce mounting force, then cost-effective production is enabled, but the plug-in connection length increases
Solution Approach 1:
The seal configuration utilizes the axial dimension (plug-in direction) by arranging seals at multiple levels rather than spreading them radially or in a single plane. This vertical stacking of seal levels achieves force reduction while minimizing the lateral footprint, making the plug-in connection as compact as possible in the radial direction while accepting controlled axial length.
Solution Approach 2:
The seal levels are positioned at specific local distances from one another along the plug-in direction, with each level serving a specific sealing function. This localized arrangement optimizes the balance between reducing mounting force and minimizing overall connection length, ensuring compact design while achieving the force distribution benefits of multi-level sealing.
Data Source
AI summary
A gear-change selector module has a pipeline module including a plurality of pipes for providing a working fluid, and a gear-change selector housing having a plurality of channels which are each assigned to one of the pipes. The pipes are coupled to the channels via a respective plug-in connection. Each plug-in connection has a seal. Viewed in the plug-in direction, the seals are arranged at different levels.