Concealed Hinge Multi-Directional Adjustment Non-Metallic Housing
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Solution Overview
Problem
Concealed door hinges currently require stable metallic materials for housings due to high fatigue strength requirements, limiting the use of non-metallic materials and allowing only two-directional adjustments.
Innovation Solution
The design incorporates a multi-axis joint with slidably guided and pivotably mounted joint bodies, using high-strength threaded plates to accommodate adjusting spindles and clamping screws, allowing for adjustments in multiple directions while enabling housings to be made from materials like plastic or aluminum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If housings are made of non-metallic materials, then manufacturing cost and weight are reduced, but fatigue strength requirements cannot be met
Solution Approach 1:
The housing is divided into two parts: a non-metallic housing body and separate metallic threaded plates. The non-metallic housing provides structural containment and reduces weight, while the metallic threaded plates provide the necessary fatigue strength for adjusting spindles and clamping screws. This segmentation allows each component to be optimized for its specific function.
Solution Approach 2:
The door hinge uses a composite construction combining non-metallic housing material with metallic threaded plates. This composite approach allows the housing to be made from lighter, more cost-effective non-metallic materials while the metallic plates provide the required mechanical strength and durability for withstanding cyclic loads.
2Device complexity
If only two-directional adjustment is implemented, then device complexity is reduced, but adaptability is limited
Solution Approach 1:
The adjustment mechanism is segmented into multiple independent adjustment systems: adjusting spindles for perpendicular adjustment and clamping screws for in-plane adjustment. Each adjustment direction has its own dedicated mechanism, allowing multi-directional adjustment without creating a single complex integrated system.
Solution Approach 2:
The adjustment capabilities are extended from two dimensions to three dimensions by adding adjustment perpendicular to the mounting plate surface through adjusting spindles, while clamping screws provide adjustment within the plane of the mounting plates. This multi-dimensional adjustment capability is achieved through separate, manageable adjustment mechanisms.
3Reliability
If metallic materials are used for housings, then fatigue strength requirements are met, but manufacturing cost and weight increase
Solution Approach 1:
The housing is segmented into a non-metallic body and separate metallic threaded plates. The non-metallic housing body reduces manufacturing cost and weight while the metallic threaded plates are only used where high fatigue strength is required for securing adjusting spindles and clamping screws, optimizing the balance between cost and strength.
Solution Approach 2:
Metallic material is applied locally only to the threaded plates that require high fatigue strength, rather than the entire housing. This localized application of metallic material provides the necessary strength exactly where needed while minimizing overall material cost and weight.
Data Source
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AI summary
A concealed hinge for pivotally mounting a door leaf to a door frame comprises a first housing (2) that can be inserted into a narrow side of the door leaf or the door frame and a second housing (3) that can be inserted into the door frame or the narrow side of the door leaf, a multi-axis joint with two joint bodies (4, 5) that connects the two housings (2, 3) to each other, first and second mounting plates (6, 7) by means of which one of the housings (2, 3) is connected to the door frame or the door leaf, wherein the joint bodies (3, 4) are slidably guided at a first end via a longitudinal guide (5) in a joint receptacle (29, 39) of the housings (2, 3) and pivotably mounted at a second end via a pivot axis (11), wherein the first housing (2) has bores (27) for receiving an adjusting spindle (8) and the second housing (3) has bores (37) for receiving a Clamping screw (9) for aligning the housing (1,2) relative to the mounting plates (6, 7), wherein at least one of the housings (2, 3) has, in an overlap area with the mounting plates (6, 7), viewed perpendicular to the surfaces of the respective housing (2, 3) into which the bores (27, 37) are provided, respective insertion pockets (28, 38) in which threaded plates (13, 14) are received, in whose threaded bores (131, 141) the adjusting spindles (10) or the clamping screws (9) can be fixed.