Door Hinge Eccentric Bushing Alignment Adjustment
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Solution Overview
Problem
Current door hinges for external gates that require airtight, watertight seals or electromagnetic radiation blocking are not adjustable enough and do not withstand the necessary load cycles, failing to provide precise guidance and positional adjustment.
Innovation Solution
A door hinge design featuring a bolt with offset pins and an eccentric bushing system that allows for precise positional adjustment in a plane transverse to the door leaf, enabling precise alignment between the door leaf and frame through the interaction of two eccentric components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional door hinges are used, then the structure is simple, but the adjustment precision and guidance accuracy are insufficient
Solution Approach 1:
The hinge is divided into multiple functional components: a first receptacle with a pin, a second receptacle with an eccentric bushing, and a bearing assembly. This segmentation allows each component to perform a specific function (rotation support, eccentric adjustment, load bearing) while collectively achieving precise positional adjustment of the door leaf relative to the frame
Solution Approach 2:
The eccentric bushing acts as an intermediary component between the two receptacles. By rotating the eccentric bushing, the relative position between the first and second receptacles is adjusted with high precision, enabling fine-tuning of the door leaf position without directly modifying the main hinge structure
2Adaptability or versatility
If adjustable door hinges are used, then the positional adjustment is possible, but the load-bearing capacity and durability are insufficient
Solution Approach 1:
The bearing assembly is pre-installed to support the pin and absorb loads before the hinge undergoes operational stress. This prior cushioning through proper load distribution ensures the hinge can withstand millions of load cycles while maintaining adjustment capability
Solution Approach 2:
The invention merges the adjustment function (eccentric bushing) with the load-bearing function (bearing assembly and pin support) into a single integrated hinge structure. This combination ensures that positional adjustment and load-bearing durability work together synergistically rather than as separate, compromising functions
3Manufacturing precision
If simple hinge structure is used, then the manufacturing is easy, but the seal precision and alignment accuracy are insufficient
Solution Approach 1:
The eccentric bushing mechanism allows the hinge to self-adjust during installation and operation. By simply rotating the eccentric bushing, the hinge automatically compensates for installation tolerances and achieves precise alignment, reducing the need for complex manufacturing tolerances and specialized assembly procedures
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
Enables precise adjustment and alignment of the door leaf relative to the door frame in all spatial directions, ensuring airtight, watertight seals and durability across millions of load cycles.
Implementation Method 1
The second receptacle (25) accommodates an eccentric bushing (24) which is rotatable about its central axis and which holds the second pin (7) so that it can be rotated about its central axis
Implementation Method 2
The first seat (23) receives a bearing assembly (13, 14) which supports a first pin (6) for rotation about its central axis
Data Source
Figure 1
Figure 2
Figure 3A~3D
AI summary
The hinge (1) has two bolts (4) comprising two pins (6, 7), and a support (2) accommodating bearing arrangements (13, 14) that rotatably holds one of the pin around a middle axis (12). The support and another support (3) are designed for fastening to a door frame and/or door leaf. Two headless screws (32, 37) are screwed in an upper part and/or lower part for fixing in defined rotation position of an eccentric bushing (24) and another pin, respectively. The screws are engaged in a recess (36) in the eccentric bushing and the latter pin, respectively. An independent claim is also included for a door comprising a door frame.