Lifting Door Cable Pull Stability via Piston Housing Guide
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Solution Overview
Problem
Lifting doors with cable pulls and pressure media face stability issues due to transverse loads, which can compromise weight relief and lead to a non-compact design, especially during larger lifts.
Innovation Solution
A door leaf guide with a guide carriage and a coupling piece fastened to the piston housing and guide carriage, along with a linear guide acting on the piston housing, helps alleviate transverse loads, ensuring stability and compactness by allowing the piston housing to be guided linearly with respect to the piston rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear guide is provided on the piston rod to reduce lateral loads, then the stability of weight relief is improved, but the overall size of the cable pull increases
Solution Approach 1:
The patent relocates the linear guide from the piston rod axis to the piston housing, guiding it along a different spatial dimension (parallel to the cable pull direction rather than along the piston rod). This dimensional shift allows the guide to function without extending the cable pull's overall envelope, resolving the contradiction between stability and compactness.
Solution Approach 2:
The piston housing serves as an intermediary element that houses both the pressure medium and the linear guide. By placing the guide on the piston housing rather than the piston rod, the system uses the housing as a mediating structure to provide guidance while maintaining a compact cable pull design.
2Duration of action of stationary object
If a comparatively long guide is provided along the piston rod's range of motion to keep hydraulic fluid free from transverse loads, then the service life of the pressure medium is improved, but the design becomes less compact
Solution Approach 1:
The linear guide is repositioned to guide the piston housing along a path parallel to the cable pull direction rather than along the piston rod's range of motion. This dimensional change eliminates the need for a long guide while still protecting the hydraulic fluid from transverse loads, thus extending service life without increasing size.
Solution Approach 2:
The patent replaces the traditional mechanical guide along the piston rod with a guided linear movement of the piston housing itself. This substitution changes the mechanical arrangement from guiding the rod to guiding the housing, achieving the same protective function with a more compact design.
3Ease of operation
If the piston rod engages the door frame with a linear guide to simplify installation, then the ease of installation is improved, but the device complexity increases
Solution Approach 1:
The patent merges the linear guide function with the existing connection between the piston housing and door frame. By having the piston housing engage the door frame through the linear guide, the system combines guidance and mounting functions into a single integrated arrangement, simplifying installation without adding complexity.
Solution Approach 2:
The piston housing serves multiple functions: it houses the pressure medium, provides the linear guide engagement, and connects to the door frame. This multi-functionality eliminates the need for separate guidance and mounting components, reducing overall device complexity while maintaining ease of installation.
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 configuration enhances the stability and compactness of the lifting door, allowing for a long service life of the pressure medium and facilitating assembly and maintenance, while maintaining structural simplicity and precision.
Implementation Method 1
a pressure medium connected to the deflection pulley, comprising a piston housing and a piston rod
Implementation Method 2
a cable pulley acting between the door leaf and the door frame with at least one deflection pulley
Implementation Method 3
a linear guide for guiding the pressure medium
Implementation Method 4
combining the door leaf guide with a guide carriage
Implementation Method 5
one with roller bearings, is slidably mounted
Data Source
Figure 1
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AI summary
A lifting door (1, 100) is described, comprising a door leaf (2), a door frame (3), a door leaf guide (17, 117) between the door leaf (2) and the door frame (3), and a device (4) for moving the door leaf (2) along the door leaf guide (17, 117) and/or for weight relief. The device includes a cable pull (5) acting between the door leaf (2) and the door frame (3), with at least one deflection pulley (6), a pressure medium (7) connected to the deflection pulley (6) comprising a piston housing (8) and a piston rod (9), and a linear guide (10) for guiding the pressure medium (7). To create a particularly stable lifting door (1, 100), it is proposed that the deflection pulley (6) be attached to the piston housing (8), with the linear guide (10) engaging the piston housing (8) to guide it linearly towards the piston rod (9).