Sliding Door Driver Resilient Mounting for Reliable Damping
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Solution Overview
Problem
Existing sliding window and door retraction devices, especially those for lift-and-slide doors, face issues with functional reliability as the damping function is disabled when the sliding sash is lowered, causing the driver to be decoupled from the projection, leading to incomplete engagement and potential damage.
Innovation Solution
The driver and projection are resiliently mounted perpendicular to the damping direction, ensuring engagement in a closed position, with a connecting element and gas pressure damper design that allows for stable damping forces without pivoting, and optional spring bias for secure coupling, using a T-shaped section or other mechanical connections for secure alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver is rigidly coupled to the projection in the damping direction, then the damping function is reliable, but the device cannot accommodate perpendicular movements without damage
Solution Approach 1:
The driver is made movable relative to the housing in a direction perpendicular to the damping direction, allowing dynamic adjustment during operation. This enables the driver to decouple from the projection without damage when perpendicular movements occur, while maintaining reliable damping coupling when properly engaged
Solution Approach 2:
The driver is divided into separate functional parts: a damping function unit that remains coupled to the housing, and a projection engagement unit that can move perpendicular to the damping direction. This segmentation allows independent optimization of damping reliability and damage resistance
2Strength
If the driver is allowed to move perpendicular to damping direction, then damage during decoupling is prevented, but damping force stability may be compromised
Solution Approach 1:
A guide rail serves as an intermediary structure that constrains the driver's perpendicular movement while allowing it to move freely in the damping direction. The guide rail ensures the driver remains properly aligned with the projection engagement area, maintaining damping force stability during perpendicular movements
Solution Approach 2:
The perpendicular movement freedom is extracted as a separate degree of freedom from the damping function. The driver can move perpendicular to the damping direction without affecting the damping coupling, which remains stable and reliable
3Adaptability or versatility
If the damper is pivoted to achieve driver movement, then coupling flexibility is improved, but the device complexity and space requirements increase
Solution Approach 1:
The pivoting mechanism is replaced with a linear guide system. Instead of rotating the damper to achieve driver movement, the driver slides linearly along a guide rail perpendicular to the damping direction, simplifying the mechanical structure while maintaining coupling flexibility
Solution Approach 2:
The driver movement is shifted from rotational motion (pivoting) to translational motion in a perpendicular dimension. This dimensional change allows the driver to engage and disengage from the projection without pivoting the entire damper assembly, reducing complexity
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 design enhances functional reliability by ensuring secure coupling and stable damping forces, preventing damage during decoupling and allowing for compact, concealed installation, maintaining effective operation even under heavy impact forces.
Implementation Method 1
a gas pressure damper that prestresses the driver in the direction of retraction
Implementation Method 2
The projection can be biased into a protruding position by a spring and then pressed into the holder against the force of the spring
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A retraction device for a sliding window or a sliding door (3), in particular a lift-and-slide door, comprises a driver (7) that is movable along a guide track (71, 72) on a housing (6); a linear damper (12) coupled to the driver (7), with a damper housing (13) and a piston and piston rod (14) movable in the damping direction within the damper housing (12); a projection (8) that can be coupled to the driver over a certain range of motion in order to decelerate a movement of the driver (7) relative to the housing (6);wherein the driver (7) has a receptacle (75) into which the projection (8) can be inserted, and a chamfer (76) is formed at least on one side of the driver (7) adjacent to the receptacle (75), wherein the driver (7) is resiliently mounted in a direction substantially perpendicular to the damping direction and/or the projection (8) is resiliently mounted in a direction substantially perpendicular to the damping direction.