Sliding Window Removable Track Bearing Alignment
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Solution Overview
Problem
Existing sliding window mechanisms for train cars often jam or tilt due to misalignment issues, particularly when the top and bottom rails have differing lengths, causing operational difficulties.
Innovation Solution
A sliding window assembly with laterally offset channels and a removable track assembly featuring bearings that support the sliding sash over its entire travel range, preventing tilting by distributing the weight and maintaining alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a typical horizontal rail mechanism is used for sliding window movement, then the window can be mounted for horizontal movement, but the sliding mechanism may become jammed or cause the window to tilt leading to misalignment
Solution Approach 1:
The patent introduces removable track assemblies as intermediary components between the window sash and the fixed frame. These track assemblies include guide portions with bearing surfaces that properly guide the sliding movement, preventing jamming and tilting. The track assemblies act as mediators that translate the sliding motion while maintaining proper alignment throughout the entire travel range.
Solution Approach 2:
The patent changes the geometric parameters of the sliding mechanism by providing guide portions with specific bearing surfaces oriented at different angles. The guide portions have top bearing surfaces and bottom bearing surfaces that are angled differently to accommodate the asymmetric window geometry (where top rail portion is shorter than bottom rail portion), ensuring proper guidance and preventing tilting throughout the sliding range.
2Adaptability or versatility
If a window with differing lengths on the top and bottom of the sliding window is used, then the window frame can accommodate asymmetric design, but tilting when opening and closing the window is an issue
Solution Approach 1:
The patent applies local quality by providing different guide portions for different parts of the window sash. Specifically, the guide portions have bearing surfaces with different orientations tailored to the local geometric requirements - the top guide portion accommodates the shorter top rail while the bottom guide portion accommodates the longer bottom rail, ensuring proper guidance at each location.
Solution Approach 2:
The patent embraces asymmetry by designing guide portions that are specifically configured for asymmetric window frames. The guide portions have bearing surfaces oriented at different angles to match the asymmetric geometry of the window sash and frame, converting the asymmetric design from a source of instability into a properly guided sliding mechanism.
3Reliability
If bearings are attached to the top sash portion and slidingly engaged with the removable track, then the sliding sash is supported over the entire travel range preventing tilting, but the device complexity increases
Solution Approach 1:
The patent segments the sliding mechanism into modular components: the fixed frame, removable track assemblies, and bearing elements attached to the sash. This segmentation allows each component to be optimized independently and facilitates easy replacement and maintenance. The track assemblies can be removed and replaced without affecting the entire window system, reducing the practical complexity despite the increased component count.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents jamming and tilting of the sliding window, ensuring smooth operation and reliable movement between open and closed positions, while allowing for easy servicing and maintenance.
Implementation Method 1
The at least one bearing is slidingly engaged with the removable track supporting the sliding sash over an entire travel range between open and closed positions preventing tilting of the sliding sash relative to the window frame
Data Source
AI summary
A sliding window assembly for a vehicle includes a window frame having a top rail portion coupled to a bottom rail portion by side rail portions. The top rail portion has a shorter length than the bottom rail portion. A fixed window is attached to the window. A sliding window is mounted in a sliding sash. The sliding sash is moveable relative to the fixed window. The sliding sash includes a top sash portion coupled to a bottom sash portion by side sash portions. The top sash portion has a shorter length than the bottom sash portion. A removable track assembly is attached to the top rail portion. At least one bearing is attached to the top sash portion of the sliding window sash. The at least one bearing is slidingly engaged with the removable track supporting the sliding sash over an entire travel range between open and closed positions preventing tilting of the sliding sash relative to the window frame.