Window Fitting Assembly with Longitudinal Adjustment Play
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Solution Overview
Problem
Conventional fitting arrangements for windows and doors require iterative and time-consuming adjustment processes due to mechanical stress between hardware assemblies, making it difficult to correctly position the sash within the frame, especially with longitudinal adjustment mechanisms.
Innovation Solution
The fitting arrangement incorporates a longitudinal adjustment mechanism with an assembly play that allows initial free movement of frame and sash parts, enabling correct positioning without interference, and a self-locking worm gear mechanism to ensure precise adjustment and load transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hardware assemblies are used to mount the sash in the frame, then the sash can be securely mounted, but the adjustment process becomes iterative and time-consuming due to mechanical stress between hardware assemblies
Solution Approach 1:
The fitting arrangement is divided into independent hardware assemblies, each with its own adjustment unit. The key innovation is that each adjustment unit operates independently through the play mechanism, allowing one assembly to be adjusted without affecting others. This segmentation enables parallel adjustment of multiple assemblies without iterative interference.
Solution Approach 2:
The patent introduces a variable parameter - the play (clearance) in the longitudinal adjustment mechanism. This play allows the adjustment unit to move freely initially, and only engages when needed for fine positioning. By changing the state from rigidly connected to having controlled clearance, the system eliminates mechanical stress transmission between assemblies during adjustment.
2Manufacturing precision
If longitudinal adjustment mechanisms are used to move frame and sash parts parallel to the pivot axis, then positioning accuracy can be improved, but mechanical stress blocks adjustment when multiple hardware assemblies are used
Solution Approach 1:
The play (clearance) acts as an intermediary element between the adjustment unit and the base element. This intermediary allows free movement during most of the adjustment process and only transmits force when the adjustment unit reaches its travel limit or when fine positioning is required. This mediator prevents direct mechanical stress transmission that would block adjustment of other assemblies.
3Manufacturing precision
If adjustment units are used to correct position of frame part and sash part, then positioning errors can be compensated, but the adjustment process becomes complex and iterative
Solution Approach 1:
Each hardware assembly is segmented with its own independent adjustment unit that has internal play. This allows position correction to be performed locally at each assembly without requiring coordinated adjustment of multiple assemblies. The segmentation simplifies the overall adjustment process from a complex iterative system to independent, straightforward adjustments.
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 simplifies the adjustment process by allowing independent positioning of the sash without interfering with other hardware assemblies, reducing installation time and ensuring accurate alignment and load distribution.
Implementation Method 1
the longitudinal adjustment mechanism cooperates with a carriage, the frame part and/or the wing part being movable relative to the carriage. The adjusting shaft interacts with the carriage via a thread, in particular an external thread/internal thread pairing.
Implementation Method 2
The longitudinal adjustment mechanism comprises a worm gear, which preferably has self-locking properties.
Data Source
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Figure 5~6
AI summary
The fitting assembly (10) has a wing part (14) and a frame part (12), where the wing part or the frame part has a base element, which is firmly connected with the frame or with the wing. A mounting clearance is provided between components of the base element interacting in the loaded state of the fitting assembly and components of a length adjustment mechanism interacting in an unloaded state of the fitting assembly in a direction parallel to a swivel axis. The mounting clearance defines a maximum relative displacement between the frame part and the wing part.