Pulling-Element Synchronization for Multi-Column Lifting Tables
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Solution Overview
Problem
Height-adjustable devices, particularly lifting tables in VIP aircraft, face challenges in synchronizing the lifting movement between multiple lifting columns and securely locking at desired heights without torsion or uneven force application.
Innovation Solution
A height-adjustable device with synchronously adjustable lifting elements connected via pulling elements, secured through non-positive and positive-locking mechanisms, featuring a central locking device that synchronizes and locks the movement of pulling elements, ensuring uniform force distribution and secure height adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual height adjustment is performed by cabin crew from the front ends of the table, then the lifting operation can be carried out, but non-uniform application of force to the lifting pillars occurs and synchronization becomes problematic
Solution Approach 1:
A pulling element acts as an intermediary mechanical connector between the lifting columns. When one lifting column is adjusted, the pulling element transmits the force and movement synchronously to the other lifting column, ensuring uniform force distribution and synchronized lifting movement across all columns without requiring manual coordination from cabin crew
Solution Approach 2:
The pulling element merges the independent lifting operations of multiple lifting columns into a single synchronized system. By mechanically coupling the lifting columns through the pulling element, the system ensures that force application and height adjustment occur uniformly across all columns simultaneously
2Adaptability or versatility
If lifting columns are adjusted independently, then individual height control is possible, but torsion and synchronization problems arise
Solution Approach 1:
The pulling element serves as a mediator that couples the lifting columns mechanically. It transmits movement and force between columns, ensuring they rise and fall synchronously while maintaining structural stability and preventing torsion, yet still allows the table to achieve different height positions
3Reliability
If locking mechanisms are added to secure lifting columns, then height stability is improved, but device complexity increases
Solution Approach 1:
The locking function is merged with the existing pulling element structure. The pulling element itself is configured to provide both the synchronization function and the locking function, eliminating the need for separate complex locking mechanisms while maintaining height stability and reliability
Data Source
AI summary
A height-adjustable device has synchronously height-adjustable lifting devices each having a standing and lifting element, which are height-adjustable relative thereto. The height adjustment is configured to be carried out via pulling elements, formed by redirection devices, to raise the lifting element relative to the standing element. Each pulling element is secured in a non-positive or positive locking manner to lifting devices, and each are configured such that a lengthening in the region of the first lifting device brings about a synchronous shortening in the region of the second lifting device. Each pulling element is constructed to raise only the one lifting element relative to the standing element. The height-adjustable device has a locking device that locks the pulling elements by a non-positive or positive locking engagement on the corresponding one of the pulling elements. The locking device is constructed to synchronise the movement of the pulling elements.