Grooved Faceplate Rail for Window Fitting Weight Reduction
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Solution Overview
Problem
Conventional window and door fitting arrangements require solid faceplates to support drive rods, leading to high material usage and manufacturing costs, as well as increased weight and potential wear due to friction.
Innovation Solution
The faceplate features a series of longitudinal grooves that reduce its weight by allowing the drive rod to rest on a thinner surface, minimizing friction and wear, while maintaining functionality through extended groove lengths and strategic lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid faceplate is used to support the drive rod, then the structural strength is sufficient, but the material usage is high and the weight is increased
Solution Approach 1:
The faceplate is segmented by introducing multiple longitudinal grooves that divide the solid structure into separated regions. These grooves reduce the material quantity while maintaining the structural integrity needed to support the drive rod, thereby reducing weight without compromising strength.
Solution Approach 2:
The grooves are strategically positioned and dimensioned to provide local structural reinforcement where needed while removing material where it is not required. This creates a non-uniform structure that optimizes the strength-to-weight ratio by concentrating material only where structurally necessary.
2Strength
If a solid faceplate is used to support the drive rod, then the structural integrity is maintained, but the manufacturing cost is high
Solution Approach 1:
The grooves are formed as integral features of the faceplate structure, allowing the entire component to be manufactured in a single extrusion process. This eliminates the need for separate manufacturing steps to create recesses or cavities, thereby reducing manufacturing complexity and cost while maintaining structural integrity.
Solution Approach 2:
The faceplate geometry is modified by changing the cross-sectional parameters through the introduction of grooves. This allows the structure to be optimized for both strength and manufacturability, as the grooved profile can be directly extruded using standard manufacturing processes without requiring additional machining or assembly steps.
3Force
If the drive rod rests on the faceplate surface, then the coupling is effective, but the friction causes wear and reduces service life
Solution Approach 1:
The grooves act as intermediaries between the drive rod and the faceplate structure. By creating a controlled interface within the grooves, the design reduces direct friction and wear while maintaining the necessary coupling effectiveness, thereby extending the service life of the mechanical connection.
Solution Approach 2:
The grooves create a localized contact interface that optimizes the friction characteristics between the drive rod and faceplate. The geometry and positioning of the grooves ensure that the drive rod maintains effective coupling while minimizing the contact area and friction-induced wear, thereby improving reliability and service life.
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 achieves material savings, reduces manufacturing costs, minimizes wear, and ensures smooth operation by reducing friction and acting as a lubricant reservoir, thereby extending the service life of the fitting arrangement.
Implementation Method 1
friction between the track and drive rod is reduced, minimizing wear and maximizing the service life of the fitting
Implementation Method 2
the grooves can be at least partially filled with a lubricant, which may, for example, be a preferably synthetically produced grease
Data Source
Figure 1
AI summary
The present invention relates to a fitting arrangement for doors or windows as well as for lift-and-slide elements, such as lift-and-slide doors or lift-and-slide windows, comprising a faceplate rail for covering a fitting groove formed in a door or window and a drive rod which rests against a surface of the faceplate rail and is guided translationally displaceable along the same, wherein several straight grooves extending in the longitudinal direction of the faceplate rail are formed in the surface of the faceplate rail against which the drive rod rests.