Bevelled Eccentric Corner Bearing for Stable Sash Tilting
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Solution Overview
Problem
Existing corner bearings either lack the ability to tilt or are unstable during continuous operation, leading to issues such as sinking or sagging of the sash.
Innovation Solution
A corner bearing design featuring a support bolt with an axially extending contour at an acute angle and a partially eccentric longitudinal axis, combined with a bracket arrangement, allows for both tilting and stable pivoting movements, ensuring secure guidance and support even under high loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a support bolt is firmly connected to a tab of a corner bearing to ensure stability, then the corner bearing becomes stable during continuous operation, but the sash cannot tilt
Solution Approach 1:
The support bolt is designed with an eccentric mounting position relative to the tab's rotation axis, creating a dynamic mechanism where the bolt's distance from the rotation axis changes during sash movement. This eccentric arrangement allows the bolt to maintain stable contact during normal operation while enabling tilting motion when needed, resolving the contradiction between stability and versatility.
Solution Approach 2:
The invention changes the geometric parameter of the support bolt's position relative to the tab, specifically placing it at an eccentric distance from the rotation axis. This parameter change enables the bolt to serve dual functions: providing stable support during closed position operation and allowing tilting movement when the sash is opened, thus resolving the contradiction between reliability and adaptability.
2Adaptability or versatility
If a support bolt is pivotably mounted on a tab to enable tilting function, then the sash can tilt, but the corner bearing is not stable enough to support the sash during continuous operation without sinking
Solution Approach 1:
The eccentric positioning of the support bolt creates a dynamic system where the bolt's relationship to the tab changes during operation. The bolt remains pivotably mounted to enable tilting, but its eccentric position ensures stable support during continuous operation by maintaining optimal contact geometry, thus resolving the contradiction between versatility and reliability.
3Shape
If a corner bearing is designed as a concealed corner bearing to be visually appealing, then it is largely invisible when the sash is closed, but the complexity of the mechanism increases
Solution Approach 1:
The corner bearing components are nested within each other to create a compact, concealed design. The support bolt is integrated into the tab structure, and the bracket arrangement is positioned to be hidden when the sash is closed. This nesting approach achieves the aesthetic goal of a concealed corner bearing while managing the inherent complexity through efficient spatial arrangement.
Data Source
Figure 1a~1b
Figure 2
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AI summary
The invention relates in particular to a corner hinge (16) with a frame part (18) and a sash part (20) that is pivotable horizontally relative to the frame part (18). The sash part (20) is supported on a support bolt (34). The support bolt (34) can be attached, in particular in a rotationally fixed manner, at its lower end to a support bracket (26) of a bracket assembly (24). At its upper end, the support bolt (34) is preferably formed eccentrically to its lower end above the support bracket (34) and has a chamfered contour (46). The eccentric design of the support bolt (34) with respect to its longitudinal axis (40) prevents the sash part (20) from tilting in the open position of the corner hinge (16), even under high loads on the sash part (20). The chamfered contour (46) allows the sash part (20) to tilt in the closed position of the corner hinge (16).The support bolt (34) is preferably received in an opening (38), in particular in the form of an axial through-opening, of the sash part (20), which may have a constriction (54) in the lower region of the support bolt (34), i.e., a narrowing of the radial width of the opening (38). The invention further relates to a window (10) or a door with such a corner hinge (16).