Adjustable Door Hinge With Slot And Shim Mechanism
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Solution Overview
Problem
Existing door hinge installations face challenges such as misalignment, friction, and screw stripping issues, requiring time-consuming shimming and potential costly replacements, especially in older buildings where door frames may be out of square or affected by moisture changes.
Innovation Solution
An adjustable door hinge design featuring two hinge plate leaves coupled by a pin with an adjustable screw cap, allowing for elevation and lateral adjustment using crescent shim discs without removing screws, and incorporating gear teeth for mechanical adjustment from the exterior to accommodate door sag and expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shimming is used to adjust door alignment, then door fit and clearance can be improved, but the process becomes time-consuming and requires repeated removal and reinstallation of hinges
Solution Approach 1:
The hinge incorporates adjustable mounting plates with slots that allow the mounting position to be dynamically changed without removing the hinge. The slot in the mounting plate enables lateral adjustment, while the adjustable thickness insert allows elevation adjustment, making the hinge adaptable to different alignment requirements.
Solution Approach 2:
The hinge is divided into separate adjustable components including the mounting plate, adjustable thickness insert, and knuckle assembly. This segmentation allows independent adjustment of each component to achieve proper door alignment without affecting other parts.
2Manufacturing precision
If screws are repeatedly removed and reinstalled for shimming adjustments, then door alignment can be corrected, but screw stripping in the door or frame occurs
Solution Approach 1:
The hinge uses adjustable mounting plates with slots that allow the mounting position to be changed without removing screws. The slot enables lateral movement, and the adjustable thickness insert allows elevation changes, eliminating the need to remove and reinstall screws multiple times.
3Manufacturing precision
If thick shims are used to elevate the door, then door clearance can be improved, but the shims become visible and affect aesthetics
Solution Approach 1:
The adjustable thickness insert is nested within the hinge mounting plate, concealed behind the hinge leaves. This allows clearance adjustment through the insert thickness while keeping the adjustment mechanism hidden, maintaining aesthetic appearance without visible shims.
4Adaptability or versatility
If door frames are adjusted for out-of-square conditions or moisture-related swelling, then door fit can be improved, but the complexity of the hinge system increases
Solution Approach 1:
The hinge incorporates adjustable mounting plates with slots and adjustable thickness inserts that allow the door to be repositioned to accommodate out-of-square frames or moisture-related dimensional changes. The slot position and insert thickness can be adjusted to adapt to various frame conditions.
Solution Approach 2:
The adjustable mounting plate with slot and adjustable thickness insert serves multiple functions: lateral positioning, elevation adjustment, and adaptation to different frame conditions. This multi-functionality provides versatility without proportionally increasing complexity.
5Ease of operation
If conventional hinges are used without adjustment capability, then the hinge structure remains simple, but door misalignment and friction cannot be corrected
Solution Approach 1:
The hinge uses adjustable mounting plates with slots and adjustable thickness inserts that enable door repositioning to eliminate misalignment and friction. The adjustment mechanism allows the door to swing freely by correcting alignment issues without requiring complex mechanical systems.
Data Source
AI summary
An adjustable door hinge having asymmetric leaves, one leaf on the door plane and a gap between leaf knuckles for vertical adjusting crescent disc shims and a leaf having a slot for positioning a fastener along the slot for lateral adjustments.