Telescopic Hinge Height Compensation for Rail Guidance
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Solution Overview
Problem
Existing rail guidance systems for sliding devices on inclined surfaces are not robust enough to withstand large wind loads and do not provide sufficient flexibility in motion, particularly for heavier or larger devices, and they often disconnect unintentionally due to height differences and wind forces.
Innovation Solution
A telescopic hinge system that allows for both translation and rotation of the sliding device along a guide rail, with a coupling piece that can tilt to adapt to varying ground slopes and maintain contact with the guide rail, ensuring robust and flexible motion while compensating for height differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed hinge system is used to support the sliding device, then the structure is simple, but it cannot compensate for height differences caused by inclined surfaces or temperature variations
Solution Approach 1:
The hinge spindle is made slidable along the longitudinal axis of the bush instead of being fixed, allowing dynamic adjustment to compensate for height differences. The spring mechanism provides continuous force to maintain contact between the roller and guide rail despite varying heights caused by inclination or thermal expansion.
Solution Approach 2:
The spindle is nested within the bush, with the roller nested within the guide rail. This nested configuration allows the spindle to slide vertically within the bush while maintaining the overall compact structure, enabling height compensation without significantly increasing device footprint.
2Ease of operation
If a telescopic hinge with spring-loaded roller contact is used to allow efficient mounting and removal, then the ease of operation is improved, but the reliability deteriorates due to risk of unintentional disconnection under wind load
Solution Approach 1:
The hinge design applies different local qualities to different parts: the spindle-bush connection allows vertical sliding for mounting/removal, while the roller-guide rail contact provides horizontal guidance and stability. The spring provides localized force only where needed to maintain roller contact, creating a balance between ease of operation and reliability.
Solution Approach 2:
The spring exerts a continuous upward force on the roller that exceeds the minimal force needed for contact, ensuring reliable engagement with the guide rail even under wind load. This excessive action (continuous spring force) prevents unintentional disconnection while still allowing easy mounting and removal when the spring force is overcome by deliberate user action.
3Strength
If the sliding device is supported at a single point by a fixed hinge, then the device complexity is reduced, but the strength and stability worsen particularly for heavier or larger devices on inclined surfaces
Solution Approach 1:
The single hinge point is transformed into a dynamic support system where the spindle can slide vertically within the bush. This dynamic capability allows the hinge to adapt to height variations on inclined surfaces while maintaining support for heavier devices, effectively distributing forces through the sliding mechanism and spring.
Solution Approach 2:
The spring acts as an intermediary element between the spindle and roller, providing continuous force to maintain roller contact with the guide rail. This intermediary mechanism enables the single hinge to support heavier devices by ensuring consistent engagement with the guide rail, distributing loads more effectively than a rigid fixed hinge.
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 telescopic hinge system provides a robust and flexible solution that maintains contact with the guide rail across varying slopes, preventing unintentional disconnection and ensuring secure fastening of heavier or larger sliding devices, even on inclined surfaces.
Implementation Method 1
A spindle is mounted in this cylindrical bush, with a roller at its top, which connects to a guide rail above the folding door. The spindle with the roller is slidable along the longitudinal axis of the bush, and, in the fastened state, is forced upward by means of a spring to make contact with the guide rail.
Data Source
AI summary
A telescopic hinge (30) is described for a rail guidance system (1) for guiding a sliding device (20) along an elongated guide rail (10) with a longitudinal axis (12). The telescopic hinge (30) comprises a first hinge part (32) and a second hinge part (34) that is mounted rotatably in the first hinge part (32) for rotation about a hinge-rotation axis (38). The second hinge part (34) is mounted slidably in the direction of the hinge-rotation axis (38); and configured for being mounted onto the guide rail (10) at an end (342) slidably along the longitudinal axis (12).