Pivot-Sliding Door Mechanism for Slimmer Pivot Column Design
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Solution Overview
Problem
Existing pivot-sliding door systems for vehicles, particularly rail vehicles, face issues with mechanical damage to the pivot column due to direct transmission of pressure surges, requiring large material and space dimensions to withstand these forces.
Innovation Solution
A pivot-sliding door system with a decoupled pivot arm and drive system, where pressure surges are absorbed by the drive system rather than the pivot column, allowing for a slim and cost-effective design by minimizing reaction torque on the pivot column.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pivot column is dimensioned to withstand pressure surges directly, then the reliability and strength are improved, but the material and space requirements increase
Solution Approach 1:
The patent introduces a pivot arm as an intermediary component between the door leaf and the pivot column. The pivot arm absorbs pressure surges through its articulation with the door leaf via an end area, preventing direct transmission of these forces to the pivot column. This mediator allows the pivot column to be dimensioned more economically while maintaining structural integrity.
Solution Approach 2:
The patent extracts the pressure surge absorption function from the pivot column and assigns it to the pivot arm mechanism. By separating the functions, the pivot column is relieved of the burden of withstanding direct pressure loads, allowing for a more compact design while the pivot arm handles the dynamic pressure forces through its rotational articulation.
2Reliability
If the pivot column is dimensioned larger to prevent mechanical damage, then the reliability is improved, but the device complexity and space occupation increase
Solution Approach 1:
The pivot arm serves as a mediator that simplifies the design by handling dynamic pressure loads through its articulated connection with the door leaf. This intermediary mechanism protects the pivot column from direct pressure surge transmission, allowing for a more straightforward dimensioning process while maintaining high reliability.
3Weight of stationary object
If the pivot column is made slimmer to save material and space, then the material and space requirements are reduced, but the strength and reliability deteriorate under pressure surges
Solution Approach 1:
The pivot arm acts as a protective intermediary that absorbs and redirects pressure surge forces, enabling the pivot column to be designed with reduced dimensions. The articulation between the pivot arm and door leaf through an end area creates a mechanical advantage that protects the slimmer pivot column from direct pressure loads.
Solution Approach 2:
The patent segments the force transmission path by introducing the pivot arm as a separate functional element. This segmentation allows the pressure surge absorption function to be separated from the pivot column, enabling the column to be optimized for its primary rotational function with reduced material requirements while maintaining overall system strength.
Data Source
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AI summary
Swing-sliding door system (1) for a vehicle, comprising a door leaf (2) extending in a plane, which can be moved from a closed position (3) to a release position (4) and vice versa by means of a pivoting mechanism, wherein the closed position and the release position are spaced apart from each other in a first direction (5), wherein the door leaf in the release position is displaceable parallel to a second direction (6) and wherein the pivoting mechanism comprises a pivot column (8) which extends along a third direction (7) and is rotatable about a first axis of rotation (9) which is parallel to the third direction.According to the invention, the pivoting mechanism further comprises a pivoting arm (10) and a drive system (25) for the pivoting arm (10), wherein the pivoting arm is rotatably mounted on the pivot column about it and is operatively connected to the door leaf via an end region (29), and wherein the drive system is provided for rotating the pivoting arm about the pivot column in order to cause the movement of the door leaf from the closed position to the release position and vice versa.