Link-Adjustable Door Hinge for Large-Door Axis Alignment
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Solution Overview
Problem
Existing biaxial hinges for large-sized doors face challenges in maintaining uniform pressure during closure, leading to unstable movable ranges and difficulty in adjusting the door's axis inclination, resulting in cumbersome installation and reduced rigidity.
Innovation Solution
A hinge design featuring an elongated fulcrum shaft and adjustment shaft, with adjustable body fixing portions and link adjustment members, allowing for centralized rotation and easy alignment, enhancing rigidity and facilitating smooth operation of large-sized doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a biaxial hinge is used for large-sized doors, then the door can be supported with enhanced rigidity, but the adjustment of axis inclination becomes extremely difficult and cumbersome
Solution Approach 1:
The hinge is divided into multiple independent components: a first hinge body with a first pivot shaft, a second hinge body with a second pivot shaft, and a link mechanism connecting them. This segmentation allows each component to be adjusted independently, making the overall adjustment process manageable despite the enhanced rigidity provided by the multi-component structure.
Solution Approach 2:
The link mechanism includes adjustable linkages that can be modified during installation to change the inclination of the second pivot shaft relative to the first pivot shaft. This dynamic adjustability enables the hinge to adapt to different installation requirements while maintaining the structural rigidity needed for large-sized doors.
2Stability of the object's composition
If multiple biaxial hinges are disposed on a door suspension side, then the rigidity is enhanced, but the alignment of axis inclinations becomes extremely difficult
Solution Approach 1:
The link mechanism incorporates adjustable linkages that allow the inclination of the second pivot shaft to be modified relative to the first pivot shaft. This adjustability enables precise alignment of multiple hinges during installation, ensuring that all axes are properly aligned while maintaining the enhanced stability provided by multiple hinges.
3Ease of operation
If a biaxial hinge with adjustment member is used, then the movable range can be narrowed to a predetermined range, but the structure becomes more complex
Solution Approach 1:
The adjustment function is segmented into a separate adjustment member that is part of the link mechanism, distinct from the main hinge bodies. This allows the narrowing of the movable range to be achieved through a dedicated component rather than complicating the entire hinge structure, thereby limiting the movable range while minimizing overall structural complexity.
4Force
If a large-sized door is manually closed, then uniform pressure application is difficult, but mechanical assistance increases structural complexity
Solution Approach 1:
The link mechanism with adjustable linkages creates a mechanical advantage system that assists in distributing closure force uniformly across the door. The adjustable nature of the linkages allows optimization of the force distribution mechanism, achieving uniform pressure application through a relatively simple mechanical assistance system rather than a complex one.
Data Source
AI summary
Provided is a hinge and a door mechanism that are mounted on a large-sized and heavy door that requires sealing property and difficult adjustment. The hinge includes: a fulcrum shaft; an adjustment shaft that is disposed adjacently to and parallel to the fulcrum shaft; a housing-side fixing portion that supports the fulcrum shaft; a door-side fixing portion that supports the adjustment shaft; and a link portion that allows the fulcrum shaft and the adjustment shaft to pass therethrough and connects the housing-side fixing portion and the door-side fixing portion to each other, wherein the body fixing portion includes an adjustment-use body fixing portion provided with a link adjustment portion that approximately fixes the link portion to an arbitrary angle with respect to the door-side fixing portion, and the body fixing portion includes at least two adjustment-use body fixing portions.