Corner Bearing Fitting Intermediate Link Design
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Solution Overview
Problem
Existing corner bearings for windows and doors protrude into the free space when opened, impairing the appearance and functionality, and suffer from wear and stability issues due to bearing and frictional forces.
Innovation Solution
The corner bearing incorporates an intermediate link that does not protrude beyond the base plate in either position, allowing for a compact design and eliminating the need for sliding or rotary sliding couplings, ensuring smooth operation and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sliding and rotary sliding couplings are used to connect the opening arm, control arm and frame part, then the fitting arrangement can achieve the desired movement, but the bearing forces and frictional forces cause increased wear and reduced stability
Solution Approach 1:
The patent replaces sliding and rotary sliding couplings with a pure rotary coupling mechanism. The opening arm and control arm are connected to the frame part and sash respectively through rotary couplings only, eliminating sliding movements. This substitution removes the harmful frictional forces and bearing forces associated with sliding couplings, thereby improving wear resistance and stability while maintaining smooth operation through the rotary coupling mechanism.
2Ease of operation
If the X-scissors formed by the opening arm and control arm are used in known fitting arrangements, then the sash can be opened by rotation, but the X-scissors protrudes considerably into the free space between the sash and fixed frame, impairing optics and accessibility
Solution Approach 1:
The patent repositions the rotary coupling connections in the depth dimension (between the sash and fixed frame) rather than allowing the X-scissors to protrude forward into the free space. The opening arm and control arm are arranged such that their rotary coupling connections are located in the space between the sash plane and fixed frame plane, effectively utilizing the third dimension to accommodate the mechanism without increasing the forward protrusion, thereby maintaining both functionality and aesthetic appearance.
3Adaptability or versatility
If sliding couplings are used to connect the opening arm and control arm to the frame part and sash, then the fitting arrangement can control the parking and rotational movement, but the frictional forces lead to sluggishness of the fitting arrangement
Solution Approach 1:
The patent replaces sliding couplings with rotary couplings to eliminate frictional forces that cause sluggishness. The controlled movement paths are achieved through the geometric arrangement of the opening arm and control arm with pure rotary connections, allowing the sash to follow the desired trajectory through rotational movement alone, without the resistance and delay introduced by sliding friction.
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 maintains a visually appealing appearance, enhances accessibility, and improves stability and wear resistance by minimizing protrusion into the open space and eliminating wear from bearing forces, resulting in smooth and resistance-free handling of the sash during rotation.
Implementation Method 1
the intermediate link being rotatably connected both to the deployment arm and to the base plate
Data Source
Figure 1
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AI summary
The fitting assembly has an arm (14) and control arm (16) that are rotatably coupled to form X-scissors and are movable between closed position corresponding to closed position of sash, and open position corresponding to rotationally open position of a wing. The arm is connected to base plate (12) through intermediate link (22) which is pivotally connected to arm and base plate. The link is constructed and arranged such that it is neither in closed position nor in opening position of opening arm and control arm protrudes from base plate in opening direction. An independent claim is included for door and window.