Door Leaf Guide System with Decoupled Cam and Spring
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Solution Overview
Problem
Existing door leaf guidance systems face issues with increased material costs, friction-induced noise, and required force for retraction due to the dependence of the control cam on door leaf width and cavity depth, as well as limited movement flexibility in existing guide systems.
Innovation Solution
The coupling piece and control cam are decoupled for most of the carrier's movement, allowing independent movement and coupling only towards the end of the insertion, enabling efficient energy storage and retraction using an energy accumulator, with the carrier being locked and unlocked to facilitate smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the control cam depends on door leaf width and cavity depth, then the door leaf can be guided through the full range of motion, but material expenditure increases
Solution Approach 1:
The guide system is divided into two separate guide rails instead of one complex control cam. The first guide rail handles horizontal movement while the second guide rail handles depth movement, allowing each component to be simpler and use less material while maintaining full guidance capability.
Solution Approach 2:
The two guide rails are designed as universal components that can accommodate different door leaf widths and cavity depths without requiring custom-sized control cams. This standardized design reduces material expenditure while maintaining adaptability through the coordinated action of both rails.
2Ease of operation
If the pressure roller rolls along the control cam across the entire depth of the cavity, then the door leaf can be retracted fully, but friction produces undesirable noise
Solution Approach 1:
The single rolling contact is segmented into two separate guide rails where the carrier moves along both rails simultaneously. This distributes the rolling contact and reduces friction concentration, thereby minimizing noise generation while maintaining full retraction capability.
Solution Approach 2:
The carrier acts as an intermediary mechanism that translates the coordinated movement along both guide rails into smooth door leaf retraction. This intermediary structure reduces direct friction between moving parts and the guide system, minimizing noise while enabling complete retraction.
3Use of energy by moving object
If the pressure roller is manually moved a long distance toward the end of the retraction movement against the force of the energy storage device, then the energy storage device is recharged, but increased force is required
Solution Approach 1:
The energy storage device is dynamically engaged only during the final phase of retraction when the coupling element contacts the control cam. During the majority of the retraction distance, the carrier moves freely along the guide rails without opposing spring force, significantly reducing the manual force required while still enabling energy recharge.
Solution Approach 2:
The energy storage device is recharged through partial action rather than continuous opposition. The spring is compressed only during the final portion of the retraction movement when the coupling element engages the control cam, reducing the overall force requirement while still achieving sufficient energy storage for ejection.
4Quantity of substance
If the coupling piece and control cam are decoupled over a large part of the movement, then material costs are reduced and noise is minimized, but the energy accumulator must be efficiently utilized
Solution Approach 1:
The coupling element is designed to automatically engage the control cam at the optimal moment during retraction, preliminarily preparing the energy storage device for efficient charging. This preliminary engagement ensures that the spring is compressed effectively during the final movement phase, maximizing energy accumulator utilization while maintaining the decoupled design benefits.
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 reduces material costs, minimizes noise, and requires less manual force for retraction, allowing for smoother and more efficient movement of the door leaf, while ensuring the energy accumulator is effectively utilized for both retraction and ejection.
Implementation Method 1
a drive device with at least one energy accumulator, wherein the carrier can be ejected by the drive device, starting from the retracted position of the carrier, by the force of the energy accumulator
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The invention relates to a guide system (5) for guiding at least one movably mounted door leaf (3a), comprising: a first guide rail (6) with a longitudinal direction (L) for guiding the door leaf (3a), a second guide rail (11) for guiding the at least one door leaf (3a), with the second guide rail (11) running transversely relative to the longitudinal direction (L) of the first guide rail (6) in the installed position, a support (14), by which the at least one door leaf (3a) is movably mounted in the direction running transversely to the longitudinal direction (L) of the first guide rail (6) relative to the second guide rail (11) between an extended and a retracted position in the installed state, a driving device (28) having at least one force accumulator (20), wherein the support (14) may be driven by the driving device (28) proceeding from the retracted position of the support (14) by the force of the force accumulator (20) at least in sections in the direction of the extended position of the support (14). The driving device (28) has a coupling piece (21) and a control cam (12), wherein the coupling piece (21) and the control cam (12) are decoupled from one another over the majority of the movement of the support (14) between the extended position and the retracted position and the support (14) may be drawn in, proceeding from a position directly upstream of the retracted position, into the retracted position on coupling of the coupling piece (21) to the control cam (12).