Sliding Door Carriage Pivoting to Prevent Rolling Body Flattening
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Solution Overview
Problem
Existing sliding door guiding arrangements suffer from flattening of rolling bodies due to prolonged inactivity, leading to noise and increased wear when the door is moved again, as the rolling body is pressed against the running surface.
Innovation Solution
The arrangement allows the rolling body to pivot about a vertical axis parallel to the rail profile, with a concave running surface and convex peripheral surface configurations to prevent flattening, and includes a delimitation profile for overload prevention, enabling minimal friction and maintaining contact only during pivotal movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the rolling body is pressed against the running surface to support the sliding door, then the sliding door can be supported stably, but the rolling body flattens over time causing noise and increased wear
Solution Approach 1:
The carriage is made pivotable about a vertical pivot axis, allowing it to dynamically adjust its position. When the sliding door is moved, the carriage pivots to align the rolling body with the running surface, preventing flattening. This dynamic adjustment maintains both support stability and rolling body integrity throughout operation.
Solution Approach 2:
The invention changes the geometric parameters of the contact interface by introducing a concave running surface and convex peripheral surface on the rolling body. This parameter change allows the rolling body to maintain point contact rather than surface contact, preventing flattening while ensuring stable support during pivotal movements.
2Reliability
If the rolling body is allowed to pivot freely to prevent flattening, then the rolling body integrity is maintained, but the carriage becomes more complex
Solution Approach 1:
The carriage incorporates a simple pivotal connection to the rail profile that allows automatic adjustment. This dynamic feature enables the rolling body to realign with the running surface during door movement, preventing flattening without requiring complex active control systems or multiple moving parts.
Solution Approach 2:
The carriage mechanism is designed to self-adjust and self-align during operation. The pivotal connection automatically positions the rolling body correctly as the door moves, eliminating the need for external control systems, sensors, or actuators to prevent flattening.
3Stability of the object's composition
If the rolling body maintains continuous contact with the running surface, then support stability is ensured, but friction increases causing wear
Solution Approach 1:
The pivotal carriage allows the rolling body to dynamically adjust its contact with the running surface. During normal operation, the rolling body maintains optimal contact for support stability. During pivotal movements, the carriage rotates to minimize friction and wear by allowing controlled separation and realignment.
Solution Approach 2:
The rolling body is designed with a convex peripheral surface and the running surface has a corresponding concave configuration. This curved geometry enables smooth rolling contact that maintains stability while reducing friction and wear compared to flat surfaces, allowing gentle displacement without energy loss.
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
This solution significantly reduces or prevents flattening of the rolling body, minimizing noise and wear, and allows for gentle displacement without lifting off the surface, effectively addressing the issue of noise and wear in sliding door systems.
Implementation Method 1
the at least one rolling body is displaceable on the at least one running surface transversely to the longitudinal direction of the at least one rail profile so that the at least one carriage is pivotable about a pivot axis extending substantially parallel to the longitudinal direction of the at least one rail profile
Implementation Method 2
The at least one running surface is at least region-wise of a concave configuration in cross-section and/or wherein the at least one rolling body has a peripheral surface, by way of which the at least one rolling body is at least region-wise supported on the at least one running surface and wherein the peripheral surface is at least region-wise of a convex configuration in cross-section
Data Source
AI summary
An arrangement includes a rail profile and a running carriage movably mounted relative to the rail profile in the longitudinal direction and to which a sliding door can be fastened. The running carriage has a rolling body, and the rail profile has a running surface extending in the longitudinal direction of the rail profile and supporting the rolling body. The rolling body is displaceable on the running surface transversely to the longitudinal direction of the rail profile. Therefore, the running carriage can be pivoted about a pivot axis extending substantially parallel to the longitudinal direction of the rail profile. The rail profile has a vertical web extending in the longitudinal direction and oriented substantially perpendicularly to the running surface. The running carriage can be pivoted about the pivot axis such that a distance from the vertical web increases under loading by the sliding door.